registry command placeholder

go.mod

@@ -3,7 +3,7 @@ module github.com/docker-slim/docker-slim
 go 1.13
 
 require (
-	github.com/Microsoft/hcsshim v0.8.22 // indirect
+	github.com/Microsoft/go-winio v0.5.1 // indirect
 	github.com/PuerkitoBio/goquery v1.5.1 // indirect
 	github.com/andybalholm/cascadia v1.2.0 // indirect
 	github.com/antchfx/htmlquery v1.2.3 // indirect
@@ -16,38 +16,49 @@ require (
 	github.com/c-bata/go-prompt v0.2.3
 	github.com/c4milo/unpackit v0.0.0-20170704181138-4ed373e9ef1c
 	github.com/compose-spec/compose-go v0.0.0-20210916141509-a7e1bc322970
+	github.com/containerd/containerd v1.5.8 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect
 	github.com/docker-slim/go-update v0.0.0-20190422071557-ed40247aff59
 	github.com/docker-slim/uilive v0.0.2 // indirect
 	github.com/docker-slim/uiprogress v0.0.0-20190505193231-9d4396e6d40b
-	github.com/docker/docker v20.10.8+incompatible
+	github.com/docker/docker v20.10.12+incompatible
 	github.com/docker/go-connections v0.4.0
 	github.com/dsnet/compress v0.0.1 // indirect
 	github.com/dustin/go-humanize v1.0.0
-	github.com/fatih/color v1.10.0
+	github.com/fatih/color v1.13.0
 	github.com/fsouza/go-dockerclient v1.7.4
 	github.com/getkin/kin-openapi v0.19.0
 	github.com/ghodss/yaml v1.0.0
 	github.com/gocolly/colly/v2 v2.0.1
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
 	github.com/gorilla/websocket v1.4.2
 	github.com/gosuri/uilive v0.0.3 // indirect
 	github.com/hooklift/assert v0.0.0-20170704181755-9d1defd6d214 // indirect
+	github.com/klauspost/compress v1.13.6 // indirect
 	github.com/klauspost/pgzip v1.2.4 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/mattn/go-colorable v0.1.12 // indirect
 	github.com/mattn/go-runewidth v0.0.9 // indirect
 	github.com/mattn/go-tty v0.0.3 // indirect
+	github.com/mitchellh/mapstructure v1.4.3 // indirect
 	github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6
-	github.com/opencontainers/runc v1.0.2 // indirect
+	github.com/opencontainers/image-spec v1.0.2-0.20211117181255-693428a734f5 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/pkg/term v0.0.0-20200520122047-c3ffed290a03 // indirect
 	github.com/sirupsen/logrus v1.8.1
+	github.com/stretchr/testify v1.7.0 // indirect
 	github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635
 	github.com/ulikunitz/xz v0.5.7 // indirect
 	github.com/urfave/cli/v2 v2.3.0
 	go.opencensus.io v0.23.0 // indirect
-	golang.org/x/net v0.0.0-20210226172049-e18ecbb05110
+	golang.org/x/net v0.0.0-20211216030914-fe4d6282115f
-	golang.org/x/sys v0.0.0-20210921065528-437939a70204
+	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e
-	google.golang.org/appengine v1.6.6 // indirect
+	golang.org/x/text v0.3.7 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )
 
 replace github.com/compose-spec/compose-go => ./pkg/third_party/compose-go

go.sum

@@ -48,6 +48,8 @@ github.com/Microsoft/go-winio v0.4.17-0.20210324224401-5516f17a5958/go.mod h1:JP
 github.com/Microsoft/go-winio v0.4.17/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
 github.com/Microsoft/go-winio v0.5.0 h1:Elr9Wn+sGKPlkaBvwu4mTrxtmOp3F3yV9qhaHbXGjwU=
 github.com/Microsoft/go-winio v0.5.0/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
+github.com/Microsoft/go-winio v0.5.1 h1:aPJp2QD7OOrhO5tQXqQoGSJc+DjDtWTGLOmNyAm6FgY=
+github.com/Microsoft/go-winio v0.5.1/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
 github.com/Microsoft/hcsshim v0.8.6/go.mod h1:Op3hHsoHPAvb6lceZHDtd9OkTew38wNoXnJs8iY7rUg=
 github.com/Microsoft/hcsshim v0.8.7-0.20190325164909-8abdbb8205e4/go.mod h1:Op3hHsoHPAvb6lceZHDtd9OkTew38wNoXnJs8iY7rUg=
 github.com/Microsoft/hcsshim v0.8.7/go.mod h1:OHd7sQqRFrYd3RmSgbgji+ctCwkbq2wbEYNSzOYtcBQ=
@@ -56,8 +58,8 @@ github.com/Microsoft/hcsshim v0.8.14/go.mod h1:NtVKoYxQuTLx6gEq0L96c9Ju4JbRJ4nY2
 github.com/Microsoft/hcsshim v0.8.15/go.mod h1:x38A4YbHbdxJtc0sF6oIz+RG0npwSCAvn69iY6URG00=
 github.com/Microsoft/hcsshim v0.8.16/go.mod h1:o5/SZqmR7x9JNKsW3pu+nqHm0MF8vbA+VxGOoXdC600=
 github.com/Microsoft/hcsshim v0.8.18/go.mod h1:+w2gRZ5ReXQhFOrvSQeNfhrYB/dg3oDwTOcER2fw4I4=
-github.com/Microsoft/hcsshim v0.8.22 h1:CulZ3GW8sNJExknToo+RWD+U+6ZM5kkNfuxywSDPd08=
+github.com/Microsoft/hcsshim v0.8.23 h1:47MSwtKGXet80aIn+7h4YI6fwPmwIghAnsx2aOUrG2M=
-github.com/Microsoft/hcsshim v0.8.22/go.mod h1:91uVCVzvX2QD16sMCenoxxXo6L1wJnLMX2PSufFMtF0=
+github.com/Microsoft/hcsshim v0.8.23/go.mod h1:4zegtUJth7lAvFyc6cH2gGQ5B3OFQim01nnU2M8jKDg=
 github.com/Microsoft/hcsshim/test v0.0.0-20201218223536-d3e5debf77da/go.mod h1:5hlzMzRKMLyo42nCZ9oml8AdTlq/0cvIaBv6tK1RehU=
 github.com/Microsoft/hcsshim/test v0.0.0-20210227013316-43a75bb4edd3/go.mod h1:mw7qgWloBUl75W/gVH3cQszUg1+gUITj7D6NY7ywVnY=
 github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ=
@@ -119,6 +121,7 @@ github.com/c-bata/go-prompt v0.2.3 h1:jjCS+QhG/sULBhAaBdjb2PlMRVaKXQgn+4yzaauvs2
 github.com/c-bata/go-prompt v0.2.3/go.mod h1:VzqtzE2ksDBcdln8G7mk2RX9QyGjH+OVqOCSiVIqS34=
 github.com/c4milo/unpackit v0.0.0-20170704181138-4ed373e9ef1c h1:aprLqMn7gSPT+vdDSl+/E6NLEuArwD/J7IWd8bJt5lQ=
 github.com/c4milo/unpackit v0.0.0-20170704181138-4ed373e9ef1c/go.mod h1:Ie6SubJv/NTO9Q0UBH0QCl3Ve50lu9hjbi5YJUw03TE=
+github.com/cenkalti/backoff/v4 v4.1.1/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
@@ -171,6 +174,8 @@ github.com/containerd/containerd v1.5.0-rc.0/go.mod h1:V/IXoMqNGgBlabz3tHD2TWDoT
 github.com/containerd/containerd v1.5.1/go.mod h1:0DOxVqwDy2iZvrZp2JUx/E+hS0UNTVn7dJnIOwtYR4g=
 github.com/containerd/containerd v1.5.5 h1:q1gxsZsGZ8ddVe98yO6pR21b5xQSMiR61lD0W96pgQo=
 github.com/containerd/containerd v1.5.5/go.mod h1:oSTh0QpT1w6jYcGmbiSbxv9OSQYaa88mPyWIuU79zyo=
+github.com/containerd/containerd v1.5.8 h1:NmkCC1/QxyZFBny8JogwLpOy2f+VEbO/f6bV2Mqtwuw=
+github.com/containerd/containerd v1.5.8/go.mod h1:YdFSv5bTFLpG2HIYmfqDpSYYTDX+mc5qtSuYx1YUb/s=
 github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
 github.com/containerd/continuity v0.0.0-20190815185530-f2a389ac0a02/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
 github.com/containerd/continuity v0.0.0-20191127005431-f65d91d395eb/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
@@ -204,6 +209,7 @@ github.com/containerd/ttrpc v0.0.0-20190828172938-92c8520ef9f8/go.mod h1:PvCDdDG
 github.com/containerd/ttrpc v0.0.0-20191028202541-4f1b8fe65a5c/go.mod h1:LPm1u0xBw8r8NOKoOdNMeVHSawSsltak+Ihv+etqsE8=
 github.com/containerd/ttrpc v1.0.1/go.mod h1:UAxOpgT9ziI0gJrmKvgcZivgxOp8iFPSk8httJEt98Y=
 github.com/containerd/ttrpc v1.0.2/go.mod h1:UAxOpgT9ziI0gJrmKvgcZivgxOp8iFPSk8httJEt98Y=
+github.com/containerd/ttrpc v1.1.0/go.mod h1:XX4ZTnoOId4HklF4edwc4DcqskFZuvXB1Evzy5KFQpQ=
 github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd/go.mod h1:Cm3kwCdlkCfMSHURc+r6fwoGH6/F1hH3S4sg0rLFWPc=
 github.com/containerd/typeurl v0.0.0-20190911142611-5eb25027c9fd/go.mod h1:GeKYzf2pQcqv7tJ0AoCuuhtnqhva5LNU3U+OyKxxJpk=
 github.com/containerd/typeurl v1.0.1/go.mod h1:TB1hUtrpaiO88KEK56ijojHS1+NeF0izUACaJW2mdXg=
@@ -239,7 +245,10 @@ github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfc
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0 h1:EoUDS0afbrsXAZ9YQ9jdu/mZ2sXgT1/2yyNng4PGlyM=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.1 h1:r/myEWzV9lfsM1tFLgDyu0atFtJ1fXn261LKYj/3DxU=
+github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/creack/pty v1.1.11 h1:07n33Z8lZxZ2qwegKbObQohDhXDQxiMMz1NOUGYlesw=
 github.com/creack/pty v1.1.11/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/cyphar/filepath-securejoin v0.2.2/go.mod h1:FpkQEhXnPnOthhzymB7CGsFk2G9VLXONKD9G7QGMM+4=
@@ -268,6 +277,8 @@ github.com/docker/distribution v2.7.1-0.20190205005809-0d3efadf0154+incompatible
 github.com/docker/distribution v2.7.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v20.10.8+incompatible h1:RVqD337BgQicVCzYrrlhLDWhq6OAD2PJDUg2LsEUvKM=
 github.com/docker/docker v20.10.8+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v20.10.12+incompatible h1:CEeNmFM0QZIsJCZKMkZx0ZcahTiewkrgiwfYD+dfl1U=
+github.com/docker/docker v20.10.12+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-events v0.0.0-20170721190031-9461782956ad/go.mod h1:Uw6UezgYA44ePAFQYUehOuCzmy5zmg/+nl2ZfMWGkpA=
@@ -294,8 +305,8 @@ github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1m
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/evanphx/json-patch v4.9.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
-github.com/fatih/color v1.10.0 h1:s36xzo75JdqLaaWoiEHk767eHiwo0598uUxyfiPkDsg=
+github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
-github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
+github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
 github.com/felixge/httpsnoop v1.0.1/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/form3tech-oss/jwt-go v3.2.2+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
 github.com/frankban/quicktest v1.11.3/go.mod h1:wRf/ReqHper53s+kmmSZizM8NamnL3IM0I9ntUbOk+k=
@@ -376,6 +387,8 @@ github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
 github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.5.0 h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
+github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/gomodule/redigo v1.8.2/go.mod h1:P9dn9mFrCBvWhGE1wpxx6fgq7BAeLBk+UUUzlpkBYO0=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
@@ -467,6 +480,8 @@ github.com/klauspost/compress v1.4.1/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0
 github.com/klauspost/compress v1.11.3/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
 github.com/klauspost/compress v1.11.13 h1:eSvu8Tmq6j2psUJqJrLcWH6K3w5Dwc+qipbaA6eVEN4=
 github.com/klauspost/compress v1.11.13/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
+github.com/klauspost/compress v1.13.6 h1:P76CopJELS0TiO2mebmnzgWaajssP/EszplttgQxcgc=
+github.com/klauspost/compress v1.13.6/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
 github.com/klauspost/cpuid v1.2.0/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
 github.com/klauspost/pgzip v1.2.4 h1:TQ7CNpYKovDOmqzRHKxJh0BeaBI7UdQZYc6p7pMQh1A=
 github.com/klauspost/pgzip v1.2.4/go.mod h1:Ch1tH69qFZu15pkjo5kYi6mth2Zzwzt50oCQKQE9RUs=
@@ -482,6 +497,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/pty v1.1.5/go.mod h1:9r2w37qlBe7rQ6e1fg1S/9xpWHSnaqNdHD3WcMdbPDA=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/mailru/easyjson v0.0.0-20190614124828-94de47d64c63/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
 github.com/mailru/easyjson v0.0.0-20190626092158-b2ccc519800e/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
@@ -489,13 +506,16 @@ github.com/mailru/easyjson v0.7.0/go.mod h1:KAzv3t3aY1NaHWoQz1+4F1ccyAH66Jk7yos7
 github.com/marstr/guid v1.1.0/go.mod h1:74gB1z2wpxxInTG6yaqA7KrtM0NZ+RbrcqDvYHefzho=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
-github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
+github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
-github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
+github.com/mattn/go-colorable v0.1.12 h1:jF+Du6AlPIjs2BiUiQlKOX0rt3SujHxPnksPKZbaA40=
+github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
 github.com/mattn/go-isatty v0.0.4/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
 github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
 github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84=
 github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
+github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
 github.com/mattn/go-runewidth v0.0.2/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
 github.com/mattn/go-runewidth v0.0.6/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
@@ -513,6 +533,8 @@ github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrk
 github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/mitchellh/mapstructure v1.4.1 h1:CpVNEelQCZBooIPDn+AR3NpivK/TIKU8bDxdASFVQag=
 github.com/mitchellh/mapstructure v1.4.1/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
+github.com/mitchellh/mapstructure v1.4.3 h1:OVowDSCllw/YjdLkam3/sm7wEtOy59d8ndGgCcyj8cs=
+github.com/mitchellh/mapstructure v1.4.3/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/mitchellh/osext v0.0.0-20151018003038-5e2d6d41470f/go.mod h1:OkQIRizQZAeMln+1tSwduZz7+Af5oFlKirV/MSYes2A=
 github.com/moby/locker v1.0.1/go.mod h1:S7SDdo5zpBK84bzzVlKr2V0hz+7x9hWbYC/kq7oQppc=
 github.com/moby/sys/mount v0.2.0 h1:WhCW5B355jtxndN5ovugJlMFJawbUODuW8fSnEH6SSM=
@@ -560,6 +582,8 @@ github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3I
 github.com/opencontainers/image-spec v1.0.0/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
 github.com/opencontainers/image-spec v1.0.1 h1:JMemWkRwHx4Zj+fVxWoMCFm/8sYGGrUVojFA6h/TRcI=
 github.com/opencontainers/image-spec v1.0.1/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
+github.com/opencontainers/image-spec v1.0.2-0.20211117181255-693428a734f5 h1:q37d91F6BO4Jp1UqWiun0dUFYaqv6WsKTLTCaWv+8LY=
+github.com/opencontainers/image-spec v1.0.2-0.20211117181255-693428a734f5/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
 github.com/opencontainers/runc v0.0.0-20190115041553-12f6a991201f/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
 github.com/opencontainers/runc v0.1.1/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
 github.com/opencontainers/runc v1.0.0-rc8.0.20190926000215-3e425f80a8c9/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
@@ -624,6 +648,8 @@ github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6So
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/safchain/ethtool v0.0.0-20190326074333-42ed695e3de8/go.mod h1:Z0q5wiBQGYcxhMZ6gUqHn6pYNLypFAvaL3UvgZLR0U4=
 github.com/saintfish/chardet v0.0.0-20120816061221-3af4cd4741ca h1:NugYot0LIVPxTvN8n+Kvkn6TrbMyxQiuvKdEwFdR9vI=
 github.com/saintfish/chardet v0.0.0-20120816061221-3af4cd4741ca/go.mod h1:uugorj2VCxiV1x+LzaIdVa9b4S4qGAcH6cbhh4qVxOU=
@@ -669,6 +695,8 @@ github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81P
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/syndtr/gocapability v0.0.0-20170704070218-db04d3cc01c8/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635 h1:kdXcSzyDtseVEc4yCz2qF8ZrQvIDBJLl4S1c3GCXmoI=
@@ -806,6 +834,8 @@ golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.0.0-20201224014010-6772e930b67b/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 h1:qWPm9rbaAMKs8Bq/9LRpbMqxWRVUAQwMI9fVrssnTfw=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20211216030914-fe4d6282115f h1:hEYJvxw1lSnWIl8X9ofsYMklzaDs90JI2az5YMd4fPM=
+golang.org/x/net v0.0.0-20211216030914-fe4d6282115f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -884,11 +914,14 @@ golang.org/x/sys v0.0.0-20201201145000-ef89a241ccb3/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201202213521-69691e467435/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210324051608-47abb6519492/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210426230700-d19ff857e887/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210921065528-437939a70204 h1:JJhkWtBuTQKyz2bd5WG9H8iUsJRU3En/KRfN8B2RnDs=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210921065528-437939a70204/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
+golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b h1:9zKuko04nR4gjZ4+DNjHqRlAJqbJETHwiNKDqTfOjfE=
 golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
@@ -899,6 +932,9 @@ golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.4 h1:0YWbFKbhXG/wIiuHDSKpS0Iy7FSA+u45VtBMfQcFTTc=
 golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -962,8 +998,8 @@ google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/appengine v1.6.6 h1:lMO5rYAqUxkmaj76jAkRUvt5JZgFymx/+Q5Mzfivuhc=
+google.golang.org/appengine v1.6.7 h1:FZR1q0exgwxzPzp/aF+VccGrSfxfPpkBqjIIEq3ru6c=
-google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
+google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/cloud v0.0.0-20151119220103-975617b05ea8/go.mod h1:0H1ncTHf11KCFhTc/+EFRbzSCOZx+VUbRMk55Yv5MYk=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@@ -1014,6 +1050,8 @@ google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlba
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -1021,6 +1059,8 @@ gopkg.in/check.v1 v1.0.0-20141024133853-64131543e789/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
@@ -1044,6 +1084,8 @@ gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=

pkg/app/master/cli.go

@@ -18,6 +18,7 @@ import (
 	"github.com/docker-slim/docker-slim/pkg/app/master/commands/lint"
 	"github.com/docker-slim/docker-slim/pkg/app/master/commands/probe"
 	"github.com/docker-slim/docker-slim/pkg/app/master/commands/profile"
+	"github.com/docker-slim/docker-slim/pkg/app/master/commands/registry"
 	"github.com/docker-slim/docker-slim/pkg/app/master/commands/run"
 	"github.com/docker-slim/docker-slim/pkg/app/master/commands/server"
 	"github.com/docker-slim/docker-slim/pkg/app/master/commands/update"
@@ -43,6 +44,7 @@ func registerCommands() {
 	xray.RegisterCommand()
 	lint.RegisterCommand()
 	build.RegisterCommand()
+	registry.RegisterCommand()
 	profile.RegisterCommand()
 	version.RegisterCommand()
 	help.RegisterCommand()

pkg/app/master/commands/registry/cli.go

@@ -0,0 +1,97 @@
+package registry
+
+import (
+	"fmt"
+
+	"github.com/docker-slim/docker-slim/pkg/app"
+	"github.com/docker-slim/docker-slim/pkg/app/master/commands"
+
+	"github.com/urfave/cli/v2"
+)
+
+const (
+	Name  = "registry"
+	Usage = "Execute registry operations"
+	Alias = "r"
+
+	PullCmdName      = "pull"
+	PullCmdNameUsage = "Pull a container image from registry"
+	PushCmdName      = "push"
+	PushCmdNameUsage = "Push a container image to a registry"
+	CopyCmdName      = "copy"
+	CopyCmdNameUsage = "Copy a container image from one registry to another"
+)
+
+func fullCmdName(subCmdName string) string {
+	return fmt.Sprintf("%s.%s", Name, subCmdName)
+}
+
+type PullCommandParams struct {
+	SaveToDocker bool
+}
+
+func PullCommandFlagValues(ctx *cli.Context) (*PullCommandParams, error) {
+	values := &PullCommandParams{
+		SaveToDocker: ctx.Bool(FlagSaveToDocker),
+	}
+
+	return values, nil
+}
+
+var CLI = &cli.Command{
+	Name:    Name,
+	Aliases: []string{Alias},
+	Usage:   Usage,
+	Subcommands: []*cli.Command{
+		{
+			Name:  PullCmdName,
+			Usage: PullCmdNameUsage,
+			Flags: []cli.Flag{
+				cflag(FlagSaveToDocker),
+			},
+			Action: func(ctx *cli.Context) error {
+				gcvalues, err := commands.GlobalFlagValues(ctx)
+				if err != nil {
+					return err
+				}
+
+				cparams, err := PullCommandFlagValues(ctx)
+				if err != nil {
+					return err
+				}
+
+				xc := app.NewExecutionContext(fullCmdName(PullCmdName))
+				OnPullCommand(xc, gcvalues, cparams)
+				return nil
+			},
+		},
+		{
+			Name:  PushCmdName,
+			Usage: PushCmdNameUsage,
+			Action: func(ctx *cli.Context) error {
+				gcvalues, err := commands.GlobalFlagValues(ctx)
+				if err != nil {
+					return err
+				}
+
+				xc := app.NewExecutionContext(fullCmdName(PushCmdName))
+				OnPushCommand(xc, gcvalues)
+				return nil
+			},
+		},
+		{
+			Name:  CopyCmdName,
+			Usage: CopyCmdNameUsage,
+			Action: func(ctx *cli.Context) error {
+				gcvalues, err := commands.GlobalFlagValues(ctx)
+				if err != nil {
+					return err
+				}
+
+				xc := app.NewExecutionContext(fullCmdName(CopyCmdName))
+				OnCopyCommand(xc, gcvalues)
+				return nil
+			},
+		},
+	},
+}

pkg/app/master/commands/registry/flags.go

@@ -0,0 +1,34 @@
+package registry
+
+import (
+	log "github.com/sirupsen/logrus"
+	"github.com/urfave/cli/v2"
+)
+
+// Registry command flag names
+const (
+	FlagSaveToDocker = "save-to-docker"
+)
+
+// Registry command flag usage info
+const (
+	FlagSaveToDockerUsage = "Save pulled image to docker"
+)
+
+var Flags = map[string]cli.Flag{
+	FlagSaveToDocker: &cli.BoolFlag{
+		Name:    FlagSaveToDocker,
+		Value:   true, //defaults to true
+		Usage:   FlagSaveToDockerUsage,
+		EnvVars: []string{"DSLIM_REG_PULL_SAVE_TO_DOCKER"},
+	},
+}
+
+func cflag(name string) cli.Flag {
+	cf, ok := Flags[name]
+	if !ok {
+		log.Fatalf("unknown flag='%s'", name)
+	}
+
+	return cf
+}

pkg/app/master/commands/registry/handler.go

@@ -0,0 +1,196 @@
+package registry
+
+import (
+	"fmt"
+
+	"github.com/docker-slim/docker-slim/pkg/app"
+	"github.com/docker-slim/docker-slim/pkg/app/master/commands"
+	"github.com/docker-slim/docker-slim/pkg/app/master/docker/dockerclient"
+	"github.com/docker-slim/docker-slim/pkg/app/master/version"
+	"github.com/docker-slim/docker-slim/pkg/command"
+	"github.com/docker-slim/docker-slim/pkg/report"
+	"github.com/docker-slim/docker-slim/pkg/util/errutil"
+	"github.com/docker-slim/docker-slim/pkg/util/fsutil"
+	v "github.com/docker-slim/docker-slim/pkg/version"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const appName = commands.AppName
+
+type ovars = app.OutVars
+
+// OnPullCommand implements the 'registry pull' docker-slim command
+func OnPullCommand(
+	xc *app.ExecutionContext,
+	gparams *commands.GenericParams,
+	cparams *PullCommandParams) {
+	cmdName := fullCmdName(PullCmdName)
+	logger := log.WithFields(log.Fields{"app": appName, "command": cmdName})
+	prefix := fmt.Sprintf("cmd=%s", cmdName)
+
+	viChan := version.CheckAsync(gparams.CheckVersion, gparams.InContainer, gparams.IsDSImage)
+
+	cmdReport := report.NewRegistryCommand(gparams.ReportLocation, gparams.InContainer)
+	cmdReport.State = command.StateStarted
+
+	xc.Out.State("started")
+
+	client, err := dockerclient.New(gparams.ClientConfig)
+	if err == dockerclient.ErrNoDockerInfo {
+		exitMsg := "missing Docker connection info"
+		if gparams.InContainer && gparams.IsDSImage {
+			exitMsg = "make sure to pass the Docker connect parameters to the docker-slim container"
+		}
+
+		xc.Out.Info("docker.connect.error",
+			ovars{
+				"message": exitMsg,
+			})
+
+		exitCode := commands.ECTCommon | commands.ECNoDockerConnectInfo
+		xc.Out.State("exited",
+			ovars{
+				"exit.code": exitCode,
+				"version":   v.Current(),
+				"location":  fsutil.ExeDir(),
+			})
+		xc.Exit(exitCode)
+	}
+	errutil.FailOn(err)
+
+	if gparams.Debug {
+		version.Print(prefix, logger, client, false, gparams.InContainer, gparams.IsDSImage)
+	}
+
+	xc.Out.State("completed")
+	cmdReport.State = command.StateCompleted
+	xc.Out.State("done")
+
+	vinfo := <-viChan
+	version.PrintCheckVersion(xc, "", vinfo)
+
+	cmdReport.State = command.StateDone
+	if cmdReport.Save() {
+		xc.Out.Info("report",
+			ovars{
+				"file": cmdReport.ReportLocation(),
+			})
+	}
+}
+
+// OnPushCommand implements the 'registry push' docker-slim command
+func OnPushCommand(
+	xc *app.ExecutionContext,
+	gparams *commands.GenericParams) {
+	cmdName := fullCmdName(PushCmdName)
+	logger := log.WithFields(log.Fields{"app": appName, "command": cmdName})
+	prefix := fmt.Sprintf("cmd=%s", cmdName)
+
+	viChan := version.CheckAsync(gparams.CheckVersion, gparams.InContainer, gparams.IsDSImage)
+
+	cmdReport := report.NewRegistryCommand(gparams.ReportLocation, gparams.InContainer)
+	cmdReport.State = command.StateStarted
+
+	xc.Out.State("started")
+
+	client, err := dockerclient.New(gparams.ClientConfig)
+	if err == dockerclient.ErrNoDockerInfo {
+		exitMsg := "missing Docker connection info"
+		if gparams.InContainer && gparams.IsDSImage {
+			exitMsg = "make sure to pass the Docker connect parameters to the docker-slim container"
+		}
+
+		xc.Out.Info("docker.connect.error",
+			ovars{
+				"message": exitMsg,
+			})
+
+		exitCode := commands.ECTCommon | commands.ECNoDockerConnectInfo
+		xc.Out.State("exited",
+			ovars{
+				"exit.code": exitCode,
+				"version":   v.Current(),
+				"location":  fsutil.ExeDir(),
+			})
+		xc.Exit(exitCode)
+	}
+	errutil.FailOn(err)
+
+	if gparams.Debug {
+		version.Print(prefix, logger, client, false, gparams.InContainer, gparams.IsDSImage)
+	}
+
+	xc.Out.State("completed")
+	cmdReport.State = command.StateCompleted
+	xc.Out.State("done")
+
+	vinfo := <-viChan
+	version.PrintCheckVersion(xc, "", vinfo)
+
+	cmdReport.State = command.StateDone
+	if cmdReport.Save() {
+		xc.Out.Info("report",
+			ovars{
+				"file": cmdReport.ReportLocation(),
+			})
+	}
+}
+
+// OnCopyCommand implements the 'registry copy' docker-slim command
+func OnCopyCommand(
+	xc *app.ExecutionContext,
+	gparams *commands.GenericParams) {
+	cmdName := fullCmdName(CopyCmdName)
+	logger := log.WithFields(log.Fields{"app": appName, "command": cmdName})
+	prefix := fmt.Sprintf("cmd=%s", cmdName)
+
+	viChan := version.CheckAsync(gparams.CheckVersion, gparams.InContainer, gparams.IsDSImage)
+
+	cmdReport := report.NewRegistryCommand(gparams.ReportLocation, gparams.InContainer)
+	cmdReport.State = command.StateStarted
+
+	xc.Out.State("started")
+
+	client, err := dockerclient.New(gparams.ClientConfig)
+	if err == dockerclient.ErrNoDockerInfo {
+		exitMsg := "missing Docker connection info"
+		if gparams.InContainer && gparams.IsDSImage {
+			exitMsg = "make sure to pass the Docker connect parameters to the docker-slim container"
+		}
+
+		xc.Out.Info("docker.connect.error",
+			ovars{
+				"message": exitMsg,
+			})
+
+		exitCode := commands.ECTCommon | commands.ECNoDockerConnectInfo
+		xc.Out.State("exited",
+			ovars{
+				"exit.code": exitCode,
+				"version":   v.Current(),
+				"location":  fsutil.ExeDir(),
+			})
+		xc.Exit(exitCode)
+	}
+	errutil.FailOn(err)
+
+	if gparams.Debug {
+		version.Print(prefix, logger, client, false, gparams.InContainer, gparams.IsDSImage)
+	}
+
+	xc.Out.State("completed")
+	cmdReport.State = command.StateCompleted
+	xc.Out.State("done")
+
+	vinfo := <-viChan
+	version.PrintCheckVersion(xc, "", vinfo)
+
+	cmdReport.State = command.StateDone
+	if cmdReport.Save() {
+		xc.Out.Info("report",
+			ovars{
+				"file": cmdReport.ReportLocation(),
+			})
+	}
+}

pkg/app/master/commands/registry/init/init.go

@@ -0,0 +1,9 @@
+package init
+
+import (
+	"github.com/docker-slim/docker-slim/pkg/app/master/commands/server"
+)
+
+func init() {
+	server.RegisterCommand()
+}

pkg/app/master/commands/registry/prompt.go

@@ -0,0 +1,10 @@
+package registry
+
+import (
+	"github.com/c-bata/go-prompt"
+)
+
+var CommandSuggestion = prompt.Suggest{
+	Text:        Name,
+	Description: Usage,
+}

pkg/app/master/commands/registry/register.go

@@ -0,0 +1,10 @@
+package registry
+
+import (
+	"github.com/docker-slim/docker-slim/pkg/app/master/commands"
+)
+
+func RegisterCommand() {
+	commands.CLI = append(commands.CLI, CLI)
+	commands.CommandSuggestions = append(commands.CommandSuggestions, CommandSuggestion)
+}

pkg/command/command.go

@@ -13,6 +13,7 @@ const (
 	Probe        Type = "probe"
 	Run          Type = "run"
 	Server       Type = "server"
+	Registry     Type = "registry"
 	Version      Type = "version"
 	Update       Type = "update"
 )

pkg/report/command_report.go

@@ -233,6 +233,15 @@ type RunCommand struct {
 	TargetReference string `json:"target_reference"`
 }
 
+// Output Version for 'registry'
+const OVRegistryCommand = "1.0"
+
+// RegistryCommand is the 'registry' command report data
+type RegistryCommand struct {
+	Command
+	TargetReference string `json:"target_reference"`
+}
+
 func (cmd *Command) init(containerized bool) {
 	cmd.Containerized = containerized
 	cmd.Engine = version.Current()
@@ -410,6 +419,21 @@ func NewRunCommand(reportLocation string, containerized bool) *RunCommand {
 	return cmd
 }
 
+// NewRegistryCommand creates a new 'registry' command report
+func NewRegistryCommand(reportLocation string, containerized bool) *RegistryCommand {
+	cmd := &RegistryCommand{
+		Command: Command{
+			reportLocation: reportLocation,
+			Version:        OVRegistryCommand, //registry command 'results' version (report and artifacts)
+			Type:           command.Registry,
+			State:          command.StateUnknown,
+		},
+	}
+
+	cmd.Command.init(containerized)
+	return cmd
+}
+
 func (p *Command) ReportLocation() string {
 	return p.reportLocation
 }

vendor/github.com/Microsoft/go-winio/README.md

@@ -11,12 +11,27 @@ package.
 
 Please see the LICENSE file for licensing information.
 
-This project has adopted the [Microsoft Open Source Code of
+## Contributing
-Conduct](https://opensource.microsoft.com/codeofconduct/). For more information
-see the [Code of Conduct
-FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact
-[opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional
-questions or comments.
 
+This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA)
+declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.
+
+When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR
+appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.
+
+We also require that contributors sign their commits using git commit -s or git commit --signoff to certify they either authored the work themselves
+or otherwise have permission to use it in this project. Please see https://developercertificate.org/ for more info, as well as to make sure that you can
+attest to the rules listed. Our CI uses the DCO Github app to ensure that all commits in a given PR are signed-off.
+
+
+## Code of Conduct
+
+This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
+For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
+contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
+
+
+
+## Special Thanks
 Thanks to natefinch for the inspiration for this library. See https://github.com/natefinch/npipe
 for another named pipe implementation.

vendor/github.com/Microsoft/go-winio/pkg/security/syscall_windows.go

@@ -2,6 +2,6 @@ package security
 
 //go:generate go run mksyscall_windows.go -output zsyscall_windows.go syscall_windows.go
 
-//sys getSecurityInfo(handle syscall.Handle, objectType uint32, si uint32, ppsidOwner **uintptr, ppsidGroup **uintptr, ppDacl *uintptr, ppSacl *uintptr, ppSecurityDescriptor *uintptr) (err error) [failretval!=0] = advapi32.GetSecurityInfo
+//sys getSecurityInfo(handle syscall.Handle, objectType uint32, si uint32, ppsidOwner **uintptr, ppsidGroup **uintptr, ppDacl *uintptr, ppSacl *uintptr, ppSecurityDescriptor *uintptr) (win32err error) = advapi32.GetSecurityInfo
-//sys setSecurityInfo(handle syscall.Handle, objectType uint32, si uint32, psidOwner uintptr, psidGroup uintptr, pDacl uintptr, pSacl uintptr) (err error) [failretval!=0] = advapi32.SetSecurityInfo
+//sys setSecurityInfo(handle syscall.Handle, objectType uint32, si uint32, psidOwner uintptr, psidGroup uintptr, pDacl uintptr, pSacl uintptr) (win32err error) = advapi32.SetSecurityInfo
-//sys setEntriesInAcl(count uintptr, pListOfEEs uintptr, oldAcl uintptr, newAcl *uintptr) (err error) [failretval!=0] = advapi32.SetEntriesInAclW
+//sys setEntriesInAcl(count uintptr, pListOfEEs uintptr, oldAcl uintptr, newAcl *uintptr) (win32err error) = advapi32.SetEntriesInAclW

vendor/github.com/Microsoft/go-winio/pkg/security/zsyscall_windows.go

@@ -45,26 +45,26 @@ var (
 	procSetSecurityInfo  = modadvapi32.NewProc("SetSecurityInfo")
 )
 
-func getSecurityInfo(handle syscall.Handle, objectType uint32, si uint32, ppsidOwner **uintptr, ppsidGroup **uintptr, ppDacl *uintptr, ppSacl *uintptr, ppSecurityDescriptor *uintptr) (err error) {
+func getSecurityInfo(handle syscall.Handle, objectType uint32, si uint32, ppsidOwner **uintptr, ppsidGroup **uintptr, ppDacl *uintptr, ppSacl *uintptr, ppSecurityDescriptor *uintptr) (win32err error) {
-	r1, _, e1 := syscall.Syscall9(procGetSecurityInfo.Addr(), 8, uintptr(handle), uintptr(objectType), uintptr(si), uintptr(unsafe.Pointer(ppsidOwner)), uintptr(unsafe.Pointer(ppsidGroup)), uintptr(unsafe.Pointer(ppDacl)), uintptr(unsafe.Pointer(ppSacl)), uintptr(unsafe.Pointer(ppSecurityDescriptor)), 0)
+	r0, _, _ := syscall.Syscall9(procGetSecurityInfo.Addr(), 8, uintptr(handle), uintptr(objectType), uintptr(si), uintptr(unsafe.Pointer(ppsidOwner)), uintptr(unsafe.Pointer(ppsidGroup)), uintptr(unsafe.Pointer(ppDacl)), uintptr(unsafe.Pointer(ppSacl)), uintptr(unsafe.Pointer(ppSecurityDescriptor)), 0)
-	if r1 != 0 {
+	if r0 != 0 {
-		err = errnoErr(e1)
+		win32err = syscall.Errno(r0)
 	}
 	return
 }
 
-func setEntriesInAcl(count uintptr, pListOfEEs uintptr, oldAcl uintptr, newAcl *uintptr) (err error) {
+func setEntriesInAcl(count uintptr, pListOfEEs uintptr, oldAcl uintptr, newAcl *uintptr) (win32err error) {
-	r1, _, e1 := syscall.Syscall6(procSetEntriesInAclW.Addr(), 4, uintptr(count), uintptr(pListOfEEs), uintptr(oldAcl), uintptr(unsafe.Pointer(newAcl)), 0, 0)
+	r0, _, _ := syscall.Syscall6(procSetEntriesInAclW.Addr(), 4, uintptr(count), uintptr(pListOfEEs), uintptr(oldAcl), uintptr(unsafe.Pointer(newAcl)), 0, 0)
-	if r1 != 0 {
+	if r0 != 0 {
-		err = errnoErr(e1)
+		win32err = syscall.Errno(r0)
 	}
 	return
 }
 
-func setSecurityInfo(handle syscall.Handle, objectType uint32, si uint32, psidOwner uintptr, psidGroup uintptr, pDacl uintptr, pSacl uintptr) (err error) {
+func setSecurityInfo(handle syscall.Handle, objectType uint32, si uint32, psidOwner uintptr, psidGroup uintptr, pDacl uintptr, pSacl uintptr) (win32err error) {
-	r1, _, e1 := syscall.Syscall9(procSetSecurityInfo.Addr(), 7, uintptr(handle), uintptr(objectType), uintptr(si), uintptr(psidOwner), uintptr(psidGroup), uintptr(pDacl), uintptr(pSacl), 0, 0)
+	r0, _, _ := syscall.Syscall9(procSetSecurityInfo.Addr(), 7, uintptr(handle), uintptr(objectType), uintptr(si), uintptr(psidOwner), uintptr(psidGroup), uintptr(pDacl), uintptr(pSacl), 0, 0)
-	if r1 != 0 {
+	if r0 != 0 {
-		err = errnoErr(e1)
+		win32err = syscall.Errno(r0)
 	}
 	return
 }

vendor/github.com/Microsoft/go-winio/vhd/vhd.go

@@ -13,11 +13,11 @@ import (
 
 //go:generate go run mksyscall_windows.go -output zvhd_windows.go vhd.go
 
-//sys createVirtualDisk(virtualStorageType *VirtualStorageType, path string, virtualDiskAccessMask uint32, securityDescriptor *uintptr, createVirtualDiskFlags uint32, providerSpecificFlags uint32, parameters *CreateVirtualDiskParameters, overlapped *syscall.Overlapped, handle *syscall.Handle) (err error) [failretval != 0] = virtdisk.CreateVirtualDisk
+//sys createVirtualDisk(virtualStorageType *VirtualStorageType, path string, virtualDiskAccessMask uint32, securityDescriptor *uintptr, createVirtualDiskFlags uint32, providerSpecificFlags uint32, parameters *CreateVirtualDiskParameters, overlapped *syscall.Overlapped, handle *syscall.Handle) (win32err error) = virtdisk.CreateVirtualDisk
-//sys openVirtualDisk(virtualStorageType *VirtualStorageType, path string, virtualDiskAccessMask uint32, openVirtualDiskFlags uint32, parameters *OpenVirtualDiskParameters, handle *syscall.Handle) (err error) [failretval != 0] = virtdisk.OpenVirtualDisk
+//sys openVirtualDisk(virtualStorageType *VirtualStorageType, path string, virtualDiskAccessMask uint32, openVirtualDiskFlags uint32, parameters *OpenVirtualDiskParameters, handle *syscall.Handle) (win32err error) = virtdisk.OpenVirtualDisk
-//sys attachVirtualDisk(handle syscall.Handle, securityDescriptor *uintptr, attachVirtualDiskFlag uint32, providerSpecificFlags uint32, parameters *AttachVirtualDiskParameters, overlapped *syscall.Overlapped) (err error) [failretval != 0] = virtdisk.AttachVirtualDisk
+//sys attachVirtualDisk(handle syscall.Handle, securityDescriptor *uintptr, attachVirtualDiskFlag uint32, providerSpecificFlags uint32, parameters *AttachVirtualDiskParameters, overlapped *syscall.Overlapped) (win32err error) = virtdisk.AttachVirtualDisk
-//sys detachVirtualDisk(handle syscall.Handle, detachVirtualDiskFlags uint32, providerSpecificFlags uint32) (err error) [failretval != 0] = virtdisk.DetachVirtualDisk
+//sys detachVirtualDisk(handle syscall.Handle, detachVirtualDiskFlags uint32, providerSpecificFlags uint32) (win32err error) = virtdisk.DetachVirtualDisk
-//sys getVirtualDiskPhysicalPath(handle syscall.Handle, diskPathSizeInBytes *uint32, buffer *uint16) (err error) [failretval != 0] = virtdisk.GetVirtualDiskPhysicalPath
+//sys getVirtualDiskPhysicalPath(handle syscall.Handle, diskPathSizeInBytes *uint32, buffer *uint16) (win32err error) = virtdisk.GetVirtualDiskPhysicalPath
 
 type (
 	CreateVirtualDiskFlag uint32

vendor/github.com/Microsoft/go-winio/vhd/zvhd_windows.go

@@ -47,60 +47,60 @@ var (
 	procOpenVirtualDisk            = modvirtdisk.NewProc("OpenVirtualDisk")
 )
 
-func attachVirtualDisk(handle syscall.Handle, securityDescriptor *uintptr, attachVirtualDiskFlag uint32, providerSpecificFlags uint32, parameters *AttachVirtualDiskParameters, overlapped *syscall.Overlapped) (err error) {
+func attachVirtualDisk(handle syscall.Handle, securityDescriptor *uintptr, attachVirtualDiskFlag uint32, providerSpecificFlags uint32, parameters *AttachVirtualDiskParameters, overlapped *syscall.Overlapped) (win32err error) {
-	r1, _, e1 := syscall.Syscall6(procAttachVirtualDisk.Addr(), 6, uintptr(handle), uintptr(unsafe.Pointer(securityDescriptor)), uintptr(attachVirtualDiskFlag), uintptr(providerSpecificFlags), uintptr(unsafe.Pointer(parameters)), uintptr(unsafe.Pointer(overlapped)))
+	r0, _, _ := syscall.Syscall6(procAttachVirtualDisk.Addr(), 6, uintptr(handle), uintptr(unsafe.Pointer(securityDescriptor)), uintptr(attachVirtualDiskFlag), uintptr(providerSpecificFlags), uintptr(unsafe.Pointer(parameters)), uintptr(unsafe.Pointer(overlapped)))
-	if r1 != 0 {
+	if r0 != 0 {
-		err = errnoErr(e1)
+		win32err = syscall.Errno(r0)
 	}
 	return
 }
 
-func createVirtualDisk(virtualStorageType *VirtualStorageType, path string, virtualDiskAccessMask uint32, securityDescriptor *uintptr, createVirtualDiskFlags uint32, providerSpecificFlags uint32, parameters *CreateVirtualDiskParameters, overlapped *syscall.Overlapped, handle *syscall.Handle) (err error) {
+func createVirtualDisk(virtualStorageType *VirtualStorageType, path string, virtualDiskAccessMask uint32, securityDescriptor *uintptr, createVirtualDiskFlags uint32, providerSpecificFlags uint32, parameters *CreateVirtualDiskParameters, overlapped *syscall.Overlapped, handle *syscall.Handle) (win32err error) {
 	var _p0 *uint16
-	_p0, err = syscall.UTF16PtrFromString(path)
+	_p0, win32err = syscall.UTF16PtrFromString(path)
-	if err != nil {
+	if win32err != nil {
 		return
 	}
 	return _createVirtualDisk(virtualStorageType, _p0, virtualDiskAccessMask, securityDescriptor, createVirtualDiskFlags, providerSpecificFlags, parameters, overlapped, handle)
 }
 
-func _createVirtualDisk(virtualStorageType *VirtualStorageType, path *uint16, virtualDiskAccessMask uint32, securityDescriptor *uintptr, createVirtualDiskFlags uint32, providerSpecificFlags uint32, parameters *CreateVirtualDiskParameters, overlapped *syscall.Overlapped, handle *syscall.Handle) (err error) {
+func _createVirtualDisk(virtualStorageType *VirtualStorageType, path *uint16, virtualDiskAccessMask uint32, securityDescriptor *uintptr, createVirtualDiskFlags uint32, providerSpecificFlags uint32, parameters *CreateVirtualDiskParameters, overlapped *syscall.Overlapped, handle *syscall.Handle) (win32err error) {
-	r1, _, e1 := syscall.Syscall9(procCreateVirtualDisk.Addr(), 9, uintptr(unsafe.Pointer(virtualStorageType)), uintptr(unsafe.Pointer(path)), uintptr(virtualDiskAccessMask), uintptr(unsafe.Pointer(securityDescriptor)), uintptr(createVirtualDiskFlags), uintptr(providerSpecificFlags), uintptr(unsafe.Pointer(parameters)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(handle)))
+	r0, _, _ := syscall.Syscall9(procCreateVirtualDisk.Addr(), 9, uintptr(unsafe.Pointer(virtualStorageType)), uintptr(unsafe.Pointer(path)), uintptr(virtualDiskAccessMask), uintptr(unsafe.Pointer(securityDescriptor)), uintptr(createVirtualDiskFlags), uintptr(providerSpecificFlags), uintptr(unsafe.Pointer(parameters)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(handle)))
-	if r1 != 0 {
+	if r0 != 0 {
-		err = errnoErr(e1)
+		win32err = syscall.Errno(r0)
 	}
 	return
 }
 
-func detachVirtualDisk(handle syscall.Handle, detachVirtualDiskFlags uint32, providerSpecificFlags uint32) (err error) {
+func detachVirtualDisk(handle syscall.Handle, detachVirtualDiskFlags uint32, providerSpecificFlags uint32) (win32err error) {
-	r1, _, e1 := syscall.Syscall(procDetachVirtualDisk.Addr(), 3, uintptr(handle), uintptr(detachVirtualDiskFlags), uintptr(providerSpecificFlags))
+	r0, _, _ := syscall.Syscall(procDetachVirtualDisk.Addr(), 3, uintptr(handle), uintptr(detachVirtualDiskFlags), uintptr(providerSpecificFlags))
-	if r1 != 0 {
+	if r0 != 0 {
-		err = errnoErr(e1)
+		win32err = syscall.Errno(r0)
 	}
 	return
 }
 
-func getVirtualDiskPhysicalPath(handle syscall.Handle, diskPathSizeInBytes *uint32, buffer *uint16) (err error) {
+func getVirtualDiskPhysicalPath(handle syscall.Handle, diskPathSizeInBytes *uint32, buffer *uint16) (win32err error) {
-	r1, _, e1 := syscall.Syscall(procGetVirtualDiskPhysicalPath.Addr(), 3, uintptr(handle), uintptr(unsafe.Pointer(diskPathSizeInBytes)), uintptr(unsafe.Pointer(buffer)))
+	r0, _, _ := syscall.Syscall(procGetVirtualDiskPhysicalPath.Addr(), 3, uintptr(handle), uintptr(unsafe.Pointer(diskPathSizeInBytes)), uintptr(unsafe.Pointer(buffer)))
-	if r1 != 0 {
+	if r0 != 0 {
-		err = errnoErr(e1)
+		win32err = syscall.Errno(r0)
 	}
 	return
 }
 
-func openVirtualDisk(virtualStorageType *VirtualStorageType, path string, virtualDiskAccessMask uint32, openVirtualDiskFlags uint32, parameters *OpenVirtualDiskParameters, handle *syscall.Handle) (err error) {
+func openVirtualDisk(virtualStorageType *VirtualStorageType, path string, virtualDiskAccessMask uint32, openVirtualDiskFlags uint32, parameters *OpenVirtualDiskParameters, handle *syscall.Handle) (win32err error) {
 	var _p0 *uint16
-	_p0, err = syscall.UTF16PtrFromString(path)
+	_p0, win32err = syscall.UTF16PtrFromString(path)
-	if err != nil {
+	if win32err != nil {
 		return
 	}
 	return _openVirtualDisk(virtualStorageType, _p0, virtualDiskAccessMask, openVirtualDiskFlags, parameters, handle)
 }
 
-func _openVirtualDisk(virtualStorageType *VirtualStorageType, path *uint16, virtualDiskAccessMask uint32, openVirtualDiskFlags uint32, parameters *OpenVirtualDiskParameters, handle *syscall.Handle) (err error) {
+func _openVirtualDisk(virtualStorageType *VirtualStorageType, path *uint16, virtualDiskAccessMask uint32, openVirtualDiskFlags uint32, parameters *OpenVirtualDiskParameters, handle *syscall.Handle) (win32err error) {
-	r1, _, e1 := syscall.Syscall6(procOpenVirtualDisk.Addr(), 6, uintptr(unsafe.Pointer(virtualStorageType)), uintptr(unsafe.Pointer(path)), uintptr(virtualDiskAccessMask), uintptr(openVirtualDiskFlags), uintptr(unsafe.Pointer(parameters)), uintptr(unsafe.Pointer(handle)))
+	r0, _, _ := syscall.Syscall6(procOpenVirtualDisk.Addr(), 6, uintptr(unsafe.Pointer(virtualStorageType)), uintptr(unsafe.Pointer(path)), uintptr(virtualDiskAccessMask), uintptr(openVirtualDiskFlags), uintptr(unsafe.Pointer(parameters)), uintptr(unsafe.Pointer(handle)))
-	if r1 != 0 {
+	if r0 != 0 {
-		err = errnoErr(e1)
+		win32err = syscall.Errno(r0)
 	}
 	return
 }

vendor/github.com/Microsoft/hcsshim/go.mod

@@ -4,18 +4,19 @@ go 1.13
 
 require (
 	github.com/Microsoft/go-winio v0.4.17
+	github.com/cenkalti/backoff/v4 v4.1.1
 	github.com/containerd/cgroups v1.0.1
 	github.com/containerd/console v1.0.2
 	github.com/containerd/containerd v1.4.9
 	github.com/containerd/continuity v0.1.0 // indirect
 	github.com/containerd/fifo v1.0.0 // indirect
 	github.com/containerd/go-runc v1.0.0
-	github.com/containerd/ttrpc v1.0.2
+	github.com/containerd/ttrpc v1.1.0
 	github.com/containerd/typeurl v1.0.2
 	github.com/gogo/protobuf v1.3.2
 	github.com/opencontainers/runtime-spec v1.0.3-0.20200929063507-e6143ca7d51d
 	github.com/pkg/errors v0.9.1
-	github.com/sirupsen/logrus v1.7.0
+	github.com/sirupsen/logrus v1.8.1
 	github.com/urfave/cli v1.22.2
 	go.opencensus.io v0.22.3
 	golang.org/x/sync v0.0.0-20201207232520-09787c993a3a

vendor/github.com/Microsoft/hcsshim/go.sum

@@ -8,6 +8,8 @@ github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRF
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/cenkalti/backoff/v4 v4.1.1 h1:G2HAfAmvm/GcKan2oOQpBXOd2tT2G57ZnZGWa1PxPBQ=
+github.com/cenkalti/backoff/v4 v4.1.1/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cilium/ebpf v0.4.0/go.mod h1:4tRaxcgiL706VnOzHOdBlY8IEAIdxINsQBcU4xJJXRs=
@@ -24,8 +26,8 @@ github.com/containerd/fifo v1.0.0 h1:6PirWBr9/L7GDamKr+XM0IeUFXu5mf3M/BPpH9gaLBU
 github.com/containerd/fifo v1.0.0/go.mod h1:ocF/ME1SX5b1AOlWi9r677YJmCPSwwWnQ9O123vzpE4=
 github.com/containerd/go-runc v1.0.0 h1:oU+lLv1ULm5taqgV/CJivypVODI4SUz1znWjv3nNYS0=
 github.com/containerd/go-runc v1.0.0/go.mod h1:cNU0ZbCgCQVZK4lgG3P+9tn9/PaJNmoDXPpoJhDR+Ok=
-github.com/containerd/ttrpc v1.0.2 h1:2/O3oTZN36q2xRolk0a2WWGgh7/Vf/liElg5hFYLX9U=
+github.com/containerd/ttrpc v1.1.0 h1:GbtyLRxb0gOLR0TYQWt3O6B0NvT8tMdorEHqIQo/lWI=
-github.com/containerd/ttrpc v1.0.2/go.mod h1:UAxOpgT9ziI0gJrmKvgcZivgxOp8iFPSk8httJEt98Y=
+github.com/containerd/ttrpc v1.1.0/go.mod h1:XX4ZTnoOId4HklF4edwc4DcqskFZuvXB1Evzy5KFQpQ=
 github.com/containerd/typeurl v1.0.2 h1:Chlt8zIieDbzQFzXzAeBEF92KhExuE4p9p92/QmY7aY=
 github.com/containerd/typeurl v1.0.2/go.mod h1:9trJWW2sRlGub4wZJRTW83VtbOLS6hwcDZXTn6oPz9s=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
@@ -56,7 +58,6 @@ github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/me
 github.com/godbus/dbus/v5 v5.0.3/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
-github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
@@ -69,14 +70,16 @@ github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
-github.com/golang/protobuf v1.3.5 h1:F768QJ1E9tib+q5Sc8MkdJi1RxLTbRcTf8LJV56aRls=
 github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
+github.com/golang/protobuf v1.5.0 h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.4 h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
@@ -86,11 +89,9 @@ github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANyt
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
-github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
-github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
@@ -125,8 +126,8 @@ github.com/prometheus/common v0.0.0-20181113130724-41aa239b4cce/go.mod h1:daVV7q
 github.com/prometheus/common v0.4.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
-github.com/prometheus/procfs v0.0.0-20190522114515-bc1a522cf7b1 h1:Lo6mRUjdS99f3zxYOUalftWHUoOGaDRqFk1+j0Q57/I=
+github.com/prometheus/procfs v0.6.0 h1:mxy4L2jP6qMonqmq+aTtOx1ifVWUgG/TAmntgbh3xv4=
-github.com/prometheus/procfs v0.0.0-20190522114515-bc1a522cf7b1/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
+github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
@@ -134,9 +135,9 @@ github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQD
 github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
-github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
-github.com/sirupsen/logrus v1.7.0 h1:ShrD1U9pZB12TX0cVy0DtePoCH97K8EtX+mg7ZARUtM=
 github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
+github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
@@ -194,10 +195,8 @@ golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200120151820-655fe14d7479/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200916030750-2334cc1a136f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -210,7 +209,6 @@ golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190624222133-a101b041ded4/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
@@ -226,6 +224,9 @@ google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63 h1:YzfoEYWbODU5Fbt
 google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/grpc v1.27.1 h1:zvIju4sqAGvwKspUQOhwnpcqSbzi7/H6QomNNjTL4sk=
 google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=

vendor/github.com/cpuguy83/go-md2man/v2/md2man/roff.go

@@ -15,7 +15,7 @@ type roffRenderer struct {
 	extensions   blackfriday.Extensions
 	listCounters []int
 	firstHeader  bool
-	defineTerm   bool
+	firstDD      bool
 	listDepth    int
 }
 
@@ -42,7 +42,8 @@ const (
 	quoteCloseTag    = "\n.RE\n"
 	listTag          = "\n.RS\n"
 	listCloseTag     = "\n.RE\n"
-	arglistTag       = "\n.TP\n"
+	dtTag            = "\n.TP\n"
+	dd2Tag           = "\n"
 	tableStart       = "\n.TS\nallbox;\n"
 	tableEnd         = ".TE\n"
 	tableCellStart   = "T{\n"
@@ -90,7 +91,7 @@ func (r *roffRenderer) RenderNode(w io.Writer, node *blackfriday.Node, entering
 
 	switch node.Type {
 	case blackfriday.Text:
-		r.handleText(w, node, entering)
+		escapeSpecialChars(w, node.Literal)
 	case blackfriday.Softbreak:
 		out(w, crTag)
 	case blackfriday.Hardbreak:
@@ -150,40 +151,21 @@ func (r *roffRenderer) RenderNode(w io.Writer, node *blackfriday.Node, entering
 		out(w, codeCloseTag)
 	case blackfriday.Table:
 		r.handleTable(w, node, entering)
-	case blackfriday.TableCell:
-		r.handleTableCell(w, node, entering)
 	case blackfriday.TableHead:
 	case blackfriday.TableBody:
 	case blackfriday.TableRow:
 		// no action as cell entries do all the nroff formatting
 		return blackfriday.GoToNext
+	case blackfriday.TableCell:
+		r.handleTableCell(w, node, entering)
+	case blackfriday.HTMLSpan:
+		// ignore other HTML tags
 	default:
 		fmt.Fprintln(os.Stderr, "WARNING: go-md2man does not handle node type "+node.Type.String())
 	}
 	return walkAction
 }
 
-func (r *roffRenderer) handleText(w io.Writer, node *blackfriday.Node, entering bool) {
-	var (
-		start, end string
-	)
-	// handle special roff table cell text encapsulation
-	if node.Parent.Type == blackfriday.TableCell {
-		if len(node.Literal) > 30 {
-			start = tableCellStart
-			end = tableCellEnd
-		} else {
-			// end rows that aren't terminated by "tableCellEnd" with a cr if end of row
-			if node.Parent.Next == nil && !node.Parent.IsHeader {
-				end = crTag
-			}
-		}
-	}
-	out(w, start)
-	escapeSpecialChars(w, node.Literal)
-	out(w, end)
-}
-
 func (r *roffRenderer) handleHeading(w io.Writer, node *blackfriday.Node, entering bool) {
 	if entering {
 		switch node.Level {
@@ -230,15 +212,20 @@ func (r *roffRenderer) handleItem(w io.Writer, node *blackfriday.Node, entering
 		if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
 			out(w, fmt.Sprintf(".IP \"%3d.\" 5\n", r.listCounters[len(r.listCounters)-1]))
 			r.listCounters[len(r.listCounters)-1]++
+		} else if node.ListFlags&blackfriday.ListTypeTerm != 0 {
+			// DT (definition term): line just before DD (see below).
+			out(w, dtTag)
+			r.firstDD = true
 		} else if node.ListFlags&blackfriday.ListTypeDefinition != 0 {
-			// state machine for handling terms and following definitions
+			// DD (definition description): line that starts with ": ".
-			// since blackfriday does not distinguish them properly, nor
+			//
-			// does it seperate them into separate lists as it should
+			// We have to distinguish between the first DD and the
-			if !r.defineTerm {
+			// subsequent ones, as there should be no vertical
-				out(w, arglistTag)
+			// whitespace between the DT and the first DD.
-				r.defineTerm = true
+			if r.firstDD {
+				r.firstDD = false
 			} else {
-				r.defineTerm = false
+				out(w, dd2Tag)
 			}
 		} else {
 			out(w, ".IP \\(bu 2\n")
@@ -251,7 +238,7 @@ func (r *roffRenderer) handleItem(w io.Writer, node *blackfriday.Node, entering
 func (r *roffRenderer) handleTable(w io.Writer, node *blackfriday.Node, entering bool) {
 	if entering {
 		out(w, tableStart)
-		//call walker to count cells (and rows?) so format section can be produced
+		// call walker to count cells (and rows?) so format section can be produced
 		columns := countColumns(node)
 		out(w, strings.Repeat("l ", columns)+"\n")
 		out(w, strings.Repeat("l ", columns)+".\n")
@@ -261,28 +248,41 @@ func (r *roffRenderer) handleTable(w io.Writer, node *blackfriday.Node, entering
 }
 
 func (r *roffRenderer) handleTableCell(w io.Writer, node *blackfriday.Node, entering bool) {
-	var (
-		start, end string
-	)
-	if node.IsHeader {
-		start = codespanTag
-		end = codespanCloseTag
-	}
 	if entering {
+		var start string
 		if node.Prev != nil && node.Prev.Type == blackfriday.TableCell {
-			out(w, "\t"+start)
+			start = "\t"
-		} else {
-			out(w, start)
 		}
+		if node.IsHeader {
+			start += codespanTag
+		} else if nodeLiteralSize(node) > 30 {
+			start += tableCellStart
+		}
+		out(w, start)
 	} else {
-		// need to carriage return if we are at the end of the header row
+		var end string
-		if node.IsHeader && node.Next == nil {
+		if node.IsHeader {
-			end = end + crTag
+			end = codespanCloseTag
+		} else if nodeLiteralSize(node) > 30 {
+			end = tableCellEnd
+		}
+		if node.Next == nil && end != tableCellEnd {
+			// Last cell: need to carriage return if we are at the end of the
+			// header row and content isn't wrapped in a "tablecell"
+			end += crTag
 		}
 		out(w, end)
 	}
 }
 
+func nodeLiteralSize(node *blackfriday.Node) int {
+	total := 0
+	for n := node.FirstChild; n != nil; n = n.FirstChild {
+		total += len(n.Literal)
+	}
+	return total
+}
+
 // because roff format requires knowing the column count before outputting any table
 // data we need to walk a table tree and count the columns
 func countColumns(node *blackfriday.Node) int {
@@ -309,15 +309,6 @@ func out(w io.Writer, output string) {
 	io.WriteString(w, output) // nolint: errcheck
 }
 
-func needsBackslash(c byte) bool {
-	for _, r := range []byte("-_&\\~") {
-		if c == r {
-			return true
-		}
-	}
-	return false
-}
-
 func escapeSpecialChars(w io.Writer, text []byte) {
 	for i := 0; i < len(text); i++ {
 		// escape initial apostrophe or period
@@ -328,7 +319,7 @@ func escapeSpecialChars(w io.Writer, text []byte) {
 		// directly copy normal characters
 		org := i
 
-		for i < len(text) && !needsBackslash(text[i]) {
+		for i < len(text) && text[i] != '\\' {
 			i++
 		}
 		if i > org {

vendor/github.com/fatih/color/README.md

@@ -78,7 +78,7 @@ notice("Don't forget this...")
 ### Custom fprint functions (FprintFunc)
 
 ```go
-blue := color.New(FgBlue).FprintfFunc()
+blue := color.New(color.FgBlue).FprintfFunc()
 blue(myWriter, "important notice: %s", stars)
 
 // Mix up with multiple attributes
@@ -127,14 +127,16 @@ fmt.Println("All text will now be bold magenta.")
  
 There might be a case where you want to explicitly disable/enable color output. the 
 `go-isatty` package will automatically disable color output for non-tty output streams 
-(for example if the output were piped directly to `less`)
+(for example if the output were piped directly to `less`).
 
-`Color` has support to disable/enable colors both globally and for single color 
+The `color` package also disables color output if the [`NO_COLOR`](https://no-color.org) environment
-definitions. For example suppose you have a CLI app and a `--no-color` bool flag. You 
+variable is set (regardless of its value).
-can easily disable the color output with:
+
+`Color` has support to disable/enable colors programatically both globally and
+for single color definitions. For example suppose you have a CLI app and a
+`--no-color` bool flag. You can easily disable the color output with:
 
 ```go
-
 var flagNoColor = flag.Bool("no-color", false, "Disable color output")
 
 if *flagNoColor {
@@ -156,6 +158,10 @@ c.EnableColor()
 c.Println("This prints again cyan...")
 ```
 
+## GitHub Actions
+
+To output color in GitHub Actions (or other CI systems that support ANSI colors), make sure to set `color.NoColor = false` so that it bypasses the check for non-tty output streams. 
+
 ## Todo
 
 * Save/Return previous values
@@ -170,4 +176,3 @@ c.Println("This prints again cyan...")
 ## License
 
 The MIT License (MIT) - see [`LICENSE.md`](https://github.com/fatih/color/blob/master/LICENSE.md) for more details
-

vendor/github.com/fatih/color/color.go

@@ -15,9 +15,11 @@ import (
 var (
 	// NoColor defines if the output is colorized or not. It's dynamically set to
 	// false or true based on the stdout's file descriptor referring to a terminal
-	// or not. This is a global option and affects all colors. For more control
+	// or not. It's also set to true if the NO_COLOR environment variable is
-	// over each color block use the methods DisableColor() individually.
+	// set (regardless of its value). This is a global option and affects all
-	NoColor = os.Getenv("TERM") == "dumb" ||
+	// colors. For more control over each color block use the methods
+	// DisableColor() individually.
+	NoColor = noColorExists() || os.Getenv("TERM") == "dumb" ||
 		(!isatty.IsTerminal(os.Stdout.Fd()) && !isatty.IsCygwinTerminal(os.Stdout.Fd()))
 
 	// Output defines the standard output of the print functions. By default
@@ -33,6 +35,12 @@ var (
 	colorsCacheMu sync.Mutex // protects colorsCache
 )
 
+// noColorExists returns true if the environment variable NO_COLOR exists.
+func noColorExists() bool {
+	_, exists := os.LookupEnv("NO_COLOR")
+	return exists
+}
+
 // Color defines a custom color object which is defined by SGR parameters.
 type Color struct {
 	params  []Attribute
@@ -108,7 +116,14 @@ const (
 
 // New returns a newly created color object.
 func New(value ...Attribute) *Color {
-	c := &Color{params: make([]Attribute, 0)}
+	c := &Color{
+		params: make([]Attribute, 0),
+	}
+
+	if noColorExists() {
+		c.noColor = boolPtr(true)
+	}
+
 	c.Add(value...)
 	return c
 }
@@ -387,7 +402,7 @@ func (c *Color) EnableColor() {
 }
 
 func (c *Color) isNoColorSet() bool {
-	// check first if we have user setted action
+	// check first if we have user set action
 	if c.noColor != nil {
 		return *c.noColor
 	}

vendor/github.com/fatih/color/doc.go

@@ -118,6 +118,8 @@ the color output with:
     	color.NoColor = true // disables colorized output
     }
 
+You can also disable the color by setting the NO_COLOR environment variable to any value.
+
 It also has support for single color definitions (local). You can
 disable/enable color output on the fly:
 

vendor/github.com/fatih/color/go.mod

@@ -3,6 +3,6 @@ module github.com/fatih/color
 go 1.13
 
 require (
-	github.com/mattn/go-colorable v0.1.8
+	github.com/mattn/go-colorable v0.1.9
-	github.com/mattn/go-isatty v0.0.12
+	github.com/mattn/go-isatty v0.0.14
 )

vendor/github.com/fatih/color/go.sum

@@ -1,7 +1,9 @@
-github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
+github.com/mattn/go-colorable v0.1.9 h1:sqDoxXbdeALODt0DAeJCVp38ps9ZogZEAXjus69YV3U=
-github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
+github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
-github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
+github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepxRw6jWvR5iDRdvjHgy8=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

vendor/github.com/klauspost/compress/LICENSE

@@ -26,3 +26,279 @@ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+------------------
+
+Files: gzhttp/*
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
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+
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+      direction or management of such entity, whether by contract or
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+          of the NOTICE file are for informational purposes only and
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
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+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+------------------
+
+Files: s2/cmd/internal/readahead/*
+
+The MIT License (MIT)
+
+Copyright (c) 2015 Klaus Post
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+---------------------
+Files: snappy/*
+Files: internal/snapref/*
+
+Copyright (c) 2011 The Snappy-Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+-----------------
+
+Files: s2/cmd/internal/filepathx/*
+
+Copyright 2016 The filepathx Authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/klauspost/compress/flate/deflate.go

@@ -440,8 +440,7 @@ func (d *compressor) deflateLazy() {
 			// index and index-1 are already inserted. If there is not enough
 			// lookahead, the last two strings are not inserted into the hash
 			// table.
-			var newIndex int
+			newIndex := s.index + prevLength - 1
-			newIndex = s.index + prevLength - 1
 			// Calculate missing hashes
 			end := newIndex
 			if end > s.maxInsertIndex {
@@ -645,7 +644,7 @@ func (d *compressor) init(w io.Writer, level int) (err error) {
 		d.fill = (*compressor).fillBlock
 		d.step = (*compressor).store
 	case level == ConstantCompression:
-		d.w.logNewTablePenalty = 8
+		d.w.logNewTablePenalty = 10
 		d.window = make([]byte, 32<<10)
 		d.fill = (*compressor).fillBlock
 		d.step = (*compressor).storeHuff

vendor/github.com/klauspost/compress/flate/fast_encoder.go

@@ -45,7 +45,7 @@ const (
 
 	bTableBits   = 17                                               // Bits used in the big tables
 	bTableSize   = 1 << bTableBits                                  // Size of the table
-	allocHistory = maxStoreBlockSize * 10                           // Size to preallocate for history.
+	allocHistory = maxStoreBlockSize * 5                            // Size to preallocate for history.
 	bufferReset  = (1 << 31) - allocHistory - maxStoreBlockSize - 1 // Reset the buffer offset when reaching this.
 )
 
@@ -215,24 +215,15 @@ func (e *fastGen) Reset() {
 func matchLen(a, b []byte) int {
 	b = b[:len(a)]
 	var checked int
-	if len(a) >= 4 {
+
-		// Try 4 bytes first
+	for len(a) >= 8 {
-		if diff := binary.LittleEndian.Uint32(a) ^ binary.LittleEndian.Uint32(b); diff != 0 {
+		b = b[:len(a)]
-			return bits.TrailingZeros32(diff) >> 3
+		if diff := binary.LittleEndian.Uint64(a) ^ binary.LittleEndian.Uint64(b); diff != 0 {
-		}
+			return checked + (bits.TrailingZeros64(diff) >> 3)
-		// Switch to 8 byte matching.
-		checked = 4
-		a = a[4:]
-		b = b[4:]
-		for len(a) >= 8 {
-			b = b[:len(a)]
-			if diff := binary.LittleEndian.Uint64(a) ^ binary.LittleEndian.Uint64(b); diff != 0 {
-				return checked + (bits.TrailingZeros64(diff) >> 3)
-			}
-			checked += 8
-			a = a[8:]
-			b = b[8:]
 		}
+		checked += 8
+		a = a[8:]
+		b = b[8:]
 	}
 	b = b[:len(a)]
 	for i := range a {

vendor/github.com/klauspost/compress/flate/huffman_bit_writer.go

@@ -6,6 +6,7 @@ package flate
 
 import (
 	"encoding/binary"
+	"fmt"
 	"io"
 )
 
@@ -27,7 +28,7 @@ const (
 	// after which bytes are flushed to the writer.
 	// Should preferably be a multiple of 6, since
 	// we accumulate 6 bytes between writes to the buffer.
-	bufferFlushSize = 240
+	bufferFlushSize = 246
 
 	// bufferSize is the actual output byte buffer size.
 	// It must have additional headroom for a flush
@@ -59,19 +60,31 @@ var offsetExtraBits = [64]int8{
 	14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20,
 }
 
-var offsetBase = [64]uint32{
+var offsetCombined = [32]uint32{}
-	/* normal deflate */
-	0x000000, 0x000001, 0x000002, 0x000003, 0x000004,
-	0x000006, 0x000008, 0x00000c, 0x000010, 0x000018,
-	0x000020, 0x000030, 0x000040, 0x000060, 0x000080,
-	0x0000c0, 0x000100, 0x000180, 0x000200, 0x000300,
-	0x000400, 0x000600, 0x000800, 0x000c00, 0x001000,
-	0x001800, 0x002000, 0x003000, 0x004000, 0x006000,
 
-	/* extended window */
+func init() {
-	0x008000, 0x00c000, 0x010000, 0x018000, 0x020000,
+	var offsetBase = [64]uint32{
-	0x030000, 0x040000, 0x060000, 0x080000, 0x0c0000,
+		/* normal deflate */
-	0x100000, 0x180000, 0x200000, 0x300000,
+		0x000000, 0x000001, 0x000002, 0x000003, 0x000004,
+		0x000006, 0x000008, 0x00000c, 0x000010, 0x000018,
+		0x000020, 0x000030, 0x000040, 0x000060, 0x000080,
+		0x0000c0, 0x000100, 0x000180, 0x000200, 0x000300,
+		0x000400, 0x000600, 0x000800, 0x000c00, 0x001000,
+		0x001800, 0x002000, 0x003000, 0x004000, 0x006000,
+
+		/* extended window */
+		0x008000, 0x00c000, 0x010000, 0x018000, 0x020000,
+		0x030000, 0x040000, 0x060000, 0x080000, 0x0c0000,
+		0x100000, 0x180000, 0x200000, 0x300000,
+	}
+
+	for i := range offsetCombined[:] {
+		// Don't use extended window values...
+		if offsetBase[i] > 0x006000 {
+			continue
+		}
+		offsetCombined[i] = uint32(offsetExtraBits[i])<<16 | (offsetBase[i])
+	}
 }
 
 // The odd order in which the codegen code sizes are written.
@@ -88,15 +101,16 @@ type huffmanBitWriter struct {
 	bits            uint64
 	nbits           uint16
 	nbytes          uint8
+	lastHuffMan     bool
 	literalEncoding *huffmanEncoder
+	tmpLitEncoding  *huffmanEncoder
 	offsetEncoding  *huffmanEncoder
 	codegenEncoding *huffmanEncoder
 	err             error
 	lastHeader      int
 	// Set between 0 (reused block can be up to 2x the size)
 	logNewTablePenalty uint
-	lastHuffMan        bool
+	bytes              [256 + 8]byte
-	bytes              [256]byte
 	literalFreq        [lengthCodesStart + 32]uint16
 	offsetFreq         [32]uint16
 	codegenFreq        [codegenCodeCount]uint16
@@ -128,6 +142,7 @@ func newHuffmanBitWriter(w io.Writer) *huffmanBitWriter {
 	return &huffmanBitWriter{
 		writer:          w,
 		literalEncoding: newHuffmanEncoder(literalCount),
+		tmpLitEncoding:  newHuffmanEncoder(literalCount),
 		codegenEncoding: newHuffmanEncoder(codegenCodeCount),
 		offsetEncoding:  newHuffmanEncoder(offsetCodeCount),
 	}
@@ -745,9 +760,31 @@ func (w *huffmanBitWriter) writeTokens(tokens []token, leCodes, oeCodes []hcode)
 	offs := oeCodes[:32]
 	lengths := leCodes[lengthCodesStart:]
 	lengths = lengths[:32]
+
+	// Go 1.16 LOVES having these on stack.
+	bits, nbits, nbytes := w.bits, w.nbits, w.nbytes
+
 	for _, t := range tokens {
 		if t < matchType {
-			w.writeCode(lits[t.literal()])
+			//w.writeCode(lits[t.literal()])
+			c := lits[t.literal()]
+			bits |= uint64(c.code) << nbits
+			nbits += c.len
+			if nbits >= 48 {
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
+			}
 			continue
 		}
 
@@ -759,38 +796,99 @@ func (w *huffmanBitWriter) writeTokens(tokens []token, leCodes, oeCodes []hcode)
 		} else {
 			// inlined
 			c := lengths[lengthCode&31]
-			w.bits |= uint64(c.code) << w.nbits
+			bits |= uint64(c.code) << nbits
-			w.nbits += c.len
+			nbits += c.len
-			if w.nbits >= 48 {
+			if nbits >= 48 {
-				w.writeOutBits()
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
 			}
 		}
 
 		extraLengthBits := uint16(lengthExtraBits[lengthCode&31])
 		if extraLengthBits > 0 {
+			//w.writeBits(extraLength, extraLengthBits)
 			extraLength := int32(length - lengthBase[lengthCode&31])
-			w.writeBits(extraLength, extraLengthBits)
+			bits |= uint64(extraLength) << nbits
+			nbits += extraLengthBits
+			if nbits >= 48 {
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
+			}
 		}
 		// Write the offset
 		offset := t.offset()
-		offsetCode := offsetCode(offset)
+		offsetCode := offset >> 16
+		offset &= matchOffsetOnlyMask
 		if false {
 			w.writeCode(offs[offsetCode&31])
 		} else {
 			// inlined
-			c := offs[offsetCode&31]
+			c := offs[offsetCode]
-			w.bits |= uint64(c.code) << w.nbits
+			bits |= uint64(c.code) << nbits
-			w.nbits += c.len
+			nbits += c.len
-			if w.nbits >= 48 {
+			if nbits >= 48 {
-				w.writeOutBits()
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
 			}
 		}
-		extraOffsetBits := uint16(offsetExtraBits[offsetCode&63])
+		offsetComb := offsetCombined[offsetCode]
-		if extraOffsetBits > 0 {
+		if offsetComb > 1<<16 {
-			extraOffset := int32(offset - offsetBase[offsetCode&63])
+			//w.writeBits(extraOffset, extraOffsetBits)
-			w.writeBits(extraOffset, extraOffsetBits)
+			bits |= uint64(offset&matchOffsetOnlyMask-(offsetComb&0xffff)) << nbits
+			nbits += uint16(offsetComb >> 16)
+			if nbits >= 48 {
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
+			}
 		}
 	}
+	// Restore...
+	w.bits, w.nbits, w.nbytes = bits, nbits, nbytes
+
 	if deferEOB {
 		w.writeCode(leCodes[endBlockMarker])
 	}
@@ -825,13 +923,28 @@ func (w *huffmanBitWriter) writeBlockHuff(eof bool, input []byte, sync bool) {
 		}
 	}
 
+	// Fill is rarely better...
+	const fill = false
+	const numLiterals = endBlockMarker + 1
+	const numOffsets = 1
+
 	// Add everything as literals
 	// We have to estimate the header size.
 	// Assume header is around 70 bytes:
 	// https://stackoverflow.com/a/25454430
 	const guessHeaderSizeBits = 70 * 8
-	estBits := histogramSize(input, w.literalFreq[:], !eof && !sync)
+	histogram(input, w.literalFreq[:numLiterals], fill)
-	estBits += w.lastHeader + len(input)/32
+	w.literalFreq[endBlockMarker] = 1
+	w.tmpLitEncoding.generate(w.literalFreq[:numLiterals], 15)
+	if fill {
+		// Clear fill...
+		for i := range w.literalFreq[:numLiterals] {
+			w.literalFreq[i] = 0
+		}
+		histogram(input, w.literalFreq[:numLiterals], false)
+	}
+	estBits := w.tmpLitEncoding.canReuseBits(w.literalFreq[:numLiterals])
+	estBits += w.lastHeader
 	if w.lastHeader == 0 {
 		estBits += guessHeaderSizeBits
 	}
@@ -839,33 +952,31 @@ func (w *huffmanBitWriter) writeBlockHuff(eof bool, input []byte, sync bool) {
 
 	// Store bytes, if we don't get a reasonable improvement.
 	ssize, storable := w.storedSize(input)
-	if storable && ssize < estBits {
+	if storable && ssize <= estBits {
 		w.writeStoredHeader(len(input), eof)
 		w.writeBytes(input)
 		return
 	}
 
-	reuseSize := 0
 	if w.lastHeader > 0 {
-		reuseSize = w.literalEncoding.bitLength(w.literalFreq[:256])
+		reuseSize := w.literalEncoding.canReuseBits(w.literalFreq[:256])
 
 		if estBits < reuseSize {
+			if debugDeflate {
+				//fmt.Println("not reusing, reuse:", reuseSize/8, "> new:", estBits/8, "- header est:", w.lastHeader/8)
+			}
 			// We owe an EOB
 			w.writeCode(w.literalEncoding.codes[endBlockMarker])
 			w.lastHeader = 0
+		} else if debugDeflate {
+			fmt.Println("reusing, reuse:", reuseSize/8, "> new:", estBits/8, "- header est:", w.lastHeader/8)
 		}
 	}
 
-	const numLiterals = endBlockMarker + 1
+	count := 0
-	const numOffsets = 1
 	if w.lastHeader == 0 {
-		if !eof && !sync {
+		// Use the temp encoding, so swap.
-			// Generate a slightly suboptimal tree that can be used for all.
+		w.literalEncoding, w.tmpLitEncoding = w.tmpLitEncoding, w.literalEncoding
-			fillHist(w.literalFreq[:numLiterals])
-		}
-		w.literalFreq[endBlockMarker] = 1
-		w.literalEncoding.generate(w.literalFreq[:numLiterals], 15)
-
 		// Generate codegen and codegenFrequencies, which indicates how to encode
 		// the literalEncoding and the offsetEncoding.
 		w.generateCodegen(numLiterals, numOffsets, w.literalEncoding, huffOffset)
@@ -876,34 +987,47 @@ func (w *huffmanBitWriter) writeBlockHuff(eof bool, input []byte, sync bool) {
 		w.writeDynamicHeader(numLiterals, numOffsets, numCodegens, eof)
 		w.lastHuffMan = true
 		w.lastHeader, _ = w.headerSize()
+		if debugDeflate {
+			count += w.lastHeader
+			fmt.Println("header:", count/8)
+		}
 	}
 
-	encoding := w.literalEncoding.codes[:257]
+	encoding := w.literalEncoding.codes[:256]
+	// Go 1.16 LOVES having these on stack. At least 1.5x the speed.
+	bits, nbits, nbytes := w.bits, w.nbits, w.nbytes
 	for _, t := range input {
 		// Bitwriting inlined, ~30% speedup
 		c := encoding[t]
-		w.bits |= uint64(c.code) << w.nbits
+		bits |= uint64(c.code) << nbits
-		w.nbits += c.len
+		nbits += c.len
-		if w.nbits >= 48 {
+		if debugDeflate {
-			bits := w.bits
+			count += int(c.len)
-			w.bits >>= 48
+		}
-			w.nbits -= 48
+		if nbits >= 48 {
-			n := w.nbytes
+			binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
-			binary.LittleEndian.PutUint64(w.bytes[n:], bits)
+			//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
-			n += 6
+			bits >>= 48
-			if n >= bufferFlushSize {
+			nbits -= 48
+			nbytes += 6
+			if nbytes >= bufferFlushSize {
 				if w.err != nil {
-					n = 0
+					nbytes = 0
 					return
 				}
-				w.write(w.bytes[:n])
+				_, w.err = w.writer.Write(w.bytes[:nbytes])
-				n = 0
+				nbytes = 0
 			}
-			w.nbytes = n
 		}
 	}
+	// Restore...
+	w.bits, w.nbits, w.nbytes = bits, nbits, nbytes
+
+	if debugDeflate {
+		fmt.Println("wrote", count/8, "bytes")
+	}
 	if eof || sync {
-		w.writeCode(encoding[endBlockMarker])
+		w.writeCode(w.literalEncoding.codes[endBlockMarker])
 		w.lastHeader = 0
 		w.lastHuffMan = false
 	}

vendor/github.com/klauspost/compress/flate/huffman_code.go

@@ -21,9 +21,13 @@ type hcode struct {
 }
 
 type huffmanEncoder struct {
-	codes     []hcode
+	codes    []hcode
-	freqcache []literalNode
+	bitCount [17]int32
-	bitCount  [17]int32
+
+	// Allocate a reusable buffer with the longest possible frequency table.
+	// Possible lengths are codegenCodeCount, offsetCodeCount and literalCount.
+	// The largest of these is literalCount, so we allocate for that case.
+	freqcache [literalCount + 1]literalNode
 }
 
 type literalNode struct {
@@ -132,6 +136,21 @@ func (h *huffmanEncoder) bitLengthRaw(b []byte) int {
 	return total
 }
 
+// canReuseBits returns the number of bits or math.MaxInt32 if the encoder cannot be reused.
+func (h *huffmanEncoder) canReuseBits(freq []uint16) int {
+	var total int
+	for i, f := range freq {
+		if f != 0 {
+			code := h.codes[i]
+			if code.len == 0 {
+				return math.MaxInt32
+			}
+			total += int(f) * int(code.len)
+		}
+	}
+	return total
+}
+
 // Return the number of literals assigned to each bit size in the Huffman encoding
 //
 // This method is only called when list.length >= 3
@@ -291,12 +310,6 @@ func (h *huffmanEncoder) assignEncodingAndSize(bitCount []int32, list []literalN
 // freq  An array of frequencies, in which frequency[i] gives the frequency of literal i.
 // maxBits  The maximum number of bits to use for any literal.
 func (h *huffmanEncoder) generate(freq []uint16, maxBits int32) {
-	if h.freqcache == nil {
-		// Allocate a reusable buffer with the longest possible frequency table.
-		// Possible lengths are codegenCodeCount, offsetCodeCount and literalCount.
-		// The largest of these is literalCount, so we allocate for that case.
-		h.freqcache = make([]literalNode, literalCount+1)
-	}
 	list := h.freqcache[:len(freq)+1]
 	// Number of non-zero literals
 	count := 0
@@ -330,10 +343,14 @@ func (h *huffmanEncoder) generate(freq []uint16, maxBits int32) {
 	h.assignEncodingAndSize(bitCount, list)
 }
 
+// atLeastOne clamps the result between 1 and 15.
 func atLeastOne(v float32) float32 {
 	if v < 1 {
 		return 1
 	}
+	if v > 15 {
+		return 15
+	}
 	return v
 }
 
@@ -346,31 +363,12 @@ func fillHist(b []uint16) {
 	}
 }
 
-// histogramSize accumulates a histogram of b in h.
+func histogram(b []byte, h []uint16, fill bool) {
-// An estimated size in bits is returned.
-// len(h) must be >= 256, and h's elements must be all zeroes.
-func histogramSize(b []byte, h []uint16, fill bool) (bits int) {
 	h = h[:256]
 	for _, t := range b {
 		h[t]++
 	}
-	total := len(b)
 	if fill {
-		for _, v := range h {
+		fillHist(h)
-			if v == 0 {
-				total++
-			}
-		}
 	}
-
-	invTotal := 1.0 / float32(total)
-	shannon := float32(0.0)
-	for _, v := range h {
-		if v > 0 {
-			n := float32(v)
-			shannon += atLeastOne(-mFastLog2(n*invTotal)) * n
-		}
-	}
-
-	return int(shannon + 0.99)
 }

vendor/github.com/klauspost/compress/flate/inflate.go

@@ -9,10 +9,10 @@ package flate
 
 import (
 	"bufio"
+	"compress/flate"
 	"fmt"
 	"io"
 	"math/bits"
-	"strconv"
 	"sync"
 )
 
@@ -41,11 +41,7 @@ var fixedOnce sync.Once
 var fixedHuffmanDecoder huffmanDecoder
 
 // A CorruptInputError reports the presence of corrupt input at a given offset.
-type CorruptInputError int64
+type CorruptInputError = flate.CorruptInputError
-
-func (e CorruptInputError) Error() string {
-	return "flate: corrupt input before offset " + strconv.FormatInt(int64(e), 10)
-}
 
 // An InternalError reports an error in the flate code itself.
 type InternalError string
@@ -55,26 +51,12 @@ func (e InternalError) Error() string { return "flate: internal error: " + strin
 // A ReadError reports an error encountered while reading input.
 //
 // Deprecated: No longer returned.
-type ReadError struct {
+type ReadError = flate.ReadError
-	Offset int64 // byte offset where error occurred
-	Err    error // error returned by underlying Read
-}
-
-func (e *ReadError) Error() string {
-	return "flate: read error at offset " + strconv.FormatInt(e.Offset, 10) + ": " + e.Err.Error()
-}
 
 // A WriteError reports an error encountered while writing output.
 //
 // Deprecated: No longer returned.
-type WriteError struct {
+type WriteError = flate.WriteError
-	Offset int64 // byte offset where error occurred
-	Err    error // error returned by underlying Write
-}
-
-func (e *WriteError) Error() string {
-	return "flate: write error at offset " + strconv.FormatInt(e.Offset, 10) + ": " + e.Err.Error()
-}
 
 // Resetter resets a ReadCloser returned by NewReader or NewReaderDict to
 // to switch to a new underlying Reader. This permits reusing a ReadCloser

vendor/github.com/klauspost/compress/flate/level5.go

@@ -182,12 +182,27 @@ func (e *fastEncL5) Encode(dst *tokens, src []byte) {
 		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
 		// them as literal bytes.
 
-		// Extend the 4-byte match as long as possible.
 		if l == 0 {
+			// Extend the 4-byte match as long as possible.
 			l = e.matchlenLong(s+4, t+4, src) + 4
 		} else if l == maxMatchLength {
 			l += e.matchlenLong(s+l, t+l, src)
 		}
+
+		// Try to locate a better match by checking the end of best match...
+		if sAt := s + l; l < 30 && sAt < sLimit {
+			eLong := e.bTable[hash7(load6432(src, sAt), tableBits)].Cur.offset
+			// Test current
+			t2 := eLong - e.cur - l
+			off := s - t2
+			if t2 >= 0 && off < maxMatchOffset && off > 0 {
+				if l2 := e.matchlenLong(s, t2, src); l2 > l {
+					t = t2
+					l = l2
+				}
+			}
+		}
+
 		// Extend backwards
 		for t > 0 && s > nextEmit && src[t-1] == src[s-1] {
 			s--

vendor/github.com/klauspost/compress/flate/level6.go

@@ -211,6 +211,31 @@ func (e *fastEncL6) Encode(dst *tokens, src []byte) {
 			l += e.matchlenLong(s+l, t+l, src)
 		}
 
+		// Try to locate a better match by checking the end-of-match...
+		if sAt := s + l; sAt < sLimit {
+			eLong := &e.bTable[hash7(load6432(src, sAt), tableBits)]
+			// Test current
+			t2 := eLong.Cur.offset - e.cur - l
+			off := s - t2
+			if off < maxMatchOffset {
+				if off > 0 && t2 >= 0 {
+					if l2 := e.matchlenLong(s, t2, src); l2 > l {
+						t = t2
+						l = l2
+					}
+				}
+				// Test next:
+				t2 = eLong.Prev.offset - e.cur - l
+				off := s - t2
+				if off > 0 && off < maxMatchOffset && t2 >= 0 {
+					if l2 := e.matchlenLong(s, t2, src); l2 > l {
+						t = t2
+						l = l2
+					}
+				}
+			}
+		}
+
 		// Extend backwards
 		for t > 0 && s > nextEmit && src[t-1] == src[s-1] {
 			s--

vendor/github.com/klauspost/compress/flate/regmask_other.go

@@ -1,4 +1,5 @@
-//+build !amd64
+//go:build !amd64
+// +build !amd64
 
 package flate
 

vendor/github.com/klauspost/compress/flate/token.go

@@ -13,14 +13,17 @@ import (
 )
 
 const (
+	// From top
 	// 2 bits:   type   0 = literal  1=EOF  2=Match   3=Unused
 	// 8 bits:   xlength = length - MIN_MATCH_LENGTH
-	// 22 bits   xoffset = offset - MIN_OFFSET_SIZE, or literal
+	// 5 bits    offsetcode
-	lengthShift = 22
+	// 16 bits   xoffset = offset - MIN_OFFSET_SIZE, or literal
-	offsetMask  = 1<<lengthShift - 1
+	lengthShift         = 22
-	typeMask    = 3 << 30
+	offsetMask          = 1<<lengthShift - 1
-	literalType = 0 << 30
+	typeMask            = 3 << 30
-	matchType   = 1 << 30
+	literalType         = 0 << 30
+	matchType           = 1 << 30
+	matchOffsetOnlyMask = 0xffff
 )
 
 // The length code for length X (MIN_MATCH_LENGTH <= X <= MAX_MATCH_LENGTH)
@@ -187,7 +190,7 @@ func (t *tokens) indexTokens(in []token) {
 			t.AddLiteral(tok.literal())
 			continue
 		}
-		t.AddMatch(uint32(tok.length()), tok.offset())
+		t.AddMatch(uint32(tok.length()), tok.offset()&matchOffsetOnlyMask)
 	}
 }
 
@@ -232,7 +235,7 @@ func (t *tokens) EstimatedBits() int {
 		for _, v := range t.litHist[:] {
 			if v > 0 {
 				n := float32(v)
-				shannon += -mFastLog2(n*invTotal) * n
+				shannon += atLeastOne(-mFastLog2(n*invTotal)) * n
 			}
 		}
 		// Just add 15 for EOB
@@ -240,7 +243,7 @@ func (t *tokens) EstimatedBits() int {
 		for i, v := range t.extraHist[1 : literalCount-256] {
 			if v > 0 {
 				n := float32(v)
-				shannon += -mFastLog2(n*invTotal) * n
+				shannon += atLeastOne(-mFastLog2(n*invTotal)) * n
 				bits += int(lengthExtraBits[i&31]) * int(v)
 				nMatches += int(v)
 			}
@@ -251,7 +254,7 @@ func (t *tokens) EstimatedBits() int {
 		for i, v := range t.offHist[:offsetCodeCount] {
 			if v > 0 {
 				n := float32(v)
-				shannon += -mFastLog2(n*invTotal) * n
+				shannon += atLeastOne(-mFastLog2(n*invTotal)) * n
 				bits += int(offsetExtraBits[i&31]) * int(v)
 			}
 		}
@@ -270,11 +273,13 @@ func (t *tokens) AddMatch(xlength uint32, xoffset uint32) {
 			panic(fmt.Errorf("invalid offset: %v", xoffset))
 		}
 	}
+	oCode := offsetCode(xoffset)
+	xoffset |= oCode << 16
 	t.nLits++
-	lengthCode := lengthCodes1[uint8(xlength)] & 31
+
+	t.extraHist[lengthCodes1[uint8(xlength)]]++
+	t.offHist[oCode]++
 	t.tokens[t.n] = token(matchType | xlength<<lengthShift | xoffset)
-	t.extraHist[lengthCode]++
-	t.offHist[offsetCode(xoffset)&31]++
 	t.n++
 }
 
@@ -286,7 +291,8 @@ func (t *tokens) AddMatchLong(xlength int32, xoffset uint32) {
 			panic(fmt.Errorf("invalid offset: %v", xoffset))
 		}
 	}
-	oc := offsetCode(xoffset) & 31
+	oc := offsetCode(xoffset)
+	xoffset |= oc << 16
 	for xlength > 0 {
 		xl := xlength
 		if xl > 258 {
@@ -294,12 +300,11 @@ func (t *tokens) AddMatchLong(xlength int32, xoffset uint32) {
 			xl = 258 - baseMatchLength
 		}
 		xlength -= xl
-		xl -= 3
+		xl -= baseMatchLength
 		t.nLits++
-		lengthCode := lengthCodes1[uint8(xl)] & 31
+		t.extraHist[lengthCodes1[uint8(xl)]]++
-		t.tokens[t.n] = token(matchType | uint32(xl)<<lengthShift | xoffset)
-		t.extraHist[lengthCode]++
 		t.offHist[oc]++
+		t.tokens[t.n] = token(matchType | uint32(xl)<<lengthShift | xoffset)
 		t.n++
 	}
 }

vendor/github.com/mattn/go-colorable/.travis.yml

@@ -1,15 +0,0 @@
-language: go
-sudo: false
-go:
-  - 1.13.x
-  - tip
-
-before_install:
-  - go get -t -v ./...
-
-script:
-  - ./go.test.sh
-
-after_success:
-  - bash <(curl -s https://codecov.io/bash)
-

vendor/github.com/mattn/go-colorable/README.md

@@ -1,6 +1,6 @@
 # go-colorable
 
-[![Build Status](https://travis-ci.org/mattn/go-colorable.svg?branch=master)](https://travis-ci.org/mattn/go-colorable)
+[![Build Status](https://github.com/mattn/go-colorable/workflows/test/badge.svg)](https://github.com/mattn/go-colorable/actions?query=workflow%3Atest)
 [![Codecov](https://codecov.io/gh/mattn/go-colorable/branch/master/graph/badge.svg)](https://codecov.io/gh/mattn/go-colorable)
 [![GoDoc](https://godoc.org/github.com/mattn/go-colorable?status.svg)](http://godoc.org/github.com/mattn/go-colorable)
 [![Go Report Card](https://goreportcard.com/badge/mattn/go-colorable)](https://goreportcard.com/report/mattn/go-colorable)

vendor/github.com/mattn/go-colorable/colorable_appengine.go

@@ -1,3 +1,4 @@
+//go:build appengine
 // +build appengine
 
 package colorable

vendor/github.com/mattn/go-colorable/colorable_others.go

@@ -1,5 +1,5 @@
-// +build !windows
+//go:build !windows && !appengine
-// +build !appengine
+// +build !windows,!appengine
 
 package colorable
 

vendor/github.com/mattn/go-colorable/colorable_windows.go

@@ -1,5 +1,5 @@
-// +build windows
+//go:build windows && !appengine
-// +build !appengine
+// +build windows,!appengine
 
 package colorable
 
@@ -452,18 +452,22 @@ func (w *Writer) Write(data []byte) (n int, err error) {
 	} else {
 		er = bytes.NewReader(data)
 	}
-	var bw [1]byte
+	var plaintext bytes.Buffer
 loop:
 	for {
 		c1, err := er.ReadByte()
 		if err != nil {
+			plaintext.WriteTo(w.out)
 			break loop
 		}
 		if c1 != 0x1b {
-			bw[0] = c1
+			plaintext.WriteByte(c1)
-			w.out.Write(bw[:])
 			continue
 		}
+		_, err = plaintext.WriteTo(w.out)
+		if err != nil {
+			break loop
+		}
 		c2, err := er.ReadByte()
 		if err != nil {
 			break loop

vendor/github.com/mattn/go-colorable/go.mod

@@ -1,8 +1,8 @@
 module github.com/mattn/go-colorable
 
 require (
-	github.com/mattn/go-isatty v0.0.12
+	github.com/mattn/go-isatty v0.0.14
-	golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae // indirect
+	golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6 // indirect
 )
 
 go 1.13

vendor/github.com/mattn/go-colorable/go.sum

@@ -1,5 +1,5 @@
-github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
+github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
-github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
-golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepxRw6jWvR5iDRdvjHgy8=
+golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6 h1:foEbQz/B0Oz6YIqu/69kfXPYeFQAuuMYFkjaqXzl5Wo=
-golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

vendor/github.com/mattn/go-colorable/noncolorable.go

@@ -18,18 +18,22 @@ func NewNonColorable(w io.Writer) io.Writer {
 // Write writes data on console
 func (w *NonColorable) Write(data []byte) (n int, err error) {
 	er := bytes.NewReader(data)
-	var bw [1]byte
+	var plaintext bytes.Buffer
 loop:
 	for {
 		c1, err := er.ReadByte()
 		if err != nil {
+			plaintext.WriteTo(w.out)
 			break loop
 		}
 		if c1 != 0x1b {
-			bw[0] = c1
+			plaintext.WriteByte(c1)
-			w.out.Write(bw[:])
 			continue
 		}
+		_, err = plaintext.WriteTo(w.out)
+		if err != nil {
+			break loop
+		}
 		c2, err := er.ReadByte()
 		if err != nil {
 			break loop
@@ -38,7 +42,6 @@ loop:
 			continue
 		}
 
-		var buf bytes.Buffer
 		for {
 			c, err := er.ReadByte()
 			if err != nil {
@@ -47,7 +50,6 @@ loop:
 			if ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '@' {
 				break
 			}
-			buf.Write([]byte(string(c)))
 		}
 	}
 

vendor/github.com/mattn/go-isatty/.travis.yml

@@ -1,14 +0,0 @@
-language: go
-sudo: false
-go:
-  - 1.13.x
-  - tip
-
-before_install:
-  - go get -t -v ./...
-
-script:
-  - ./go.test.sh
-
-after_success:
-  - bash <(curl -s https://codecov.io/bash)

vendor/github.com/mattn/go-isatty/go.mod

@@ -2,4 +2,4 @@ module github.com/mattn/go-isatty
 
 go 1.12
 
-require golang.org/x/sys v0.0.0-20200116001909-b77594299b42
+require golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c

vendor/github.com/mattn/go-isatty/isatty_bsd.go

@@ -1,3 +1,4 @@
+//go:build (darwin || freebsd || openbsd || netbsd || dragonfly) && !appengine
 // +build darwin freebsd openbsd netbsd dragonfly
 // +build !appengine
 

vendor/github.com/mattn/go-isatty/isatty_others.go

@@ -1,4 +1,5 @@
-// +build appengine js nacl
+//go:build appengine || js || nacl || wasm
+// +build appengine js nacl wasm
 
 package isatty
 

vendor/github.com/mattn/go-isatty/isatty_plan9.go

@@ -1,3 +1,4 @@
+//go:build plan9
 // +build plan9
 
 package isatty

vendor/github.com/mattn/go-isatty/isatty_solaris.go

@@ -1,5 +1,5 @@
-// +build solaris
+//go:build solaris && !appengine
-// +build !appengine
+// +build solaris,!appengine
 
 package isatty
 
@@ -8,10 +8,9 @@ import (
 )
 
 // IsTerminal returns true if the given file descriptor is a terminal.
-// see: http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libbc/libc/gen/common/isatty.c
+// see: https://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libc/port/gen/isatty.c
 func IsTerminal(fd uintptr) bool {
-	var termio unix.Termio
+	_, err := unix.IoctlGetTermio(int(fd), unix.TCGETA)
-	err := unix.IoctlSetTermio(int(fd), unix.TCGETA, &termio)
 	return err == nil
 }
 

vendor/github.com/mattn/go-isatty/isatty_tcgets.go

@@ -1,4 +1,5 @@
-// +build linux aix
+//go:build (linux || aix || zos) && !appengine
+// +build linux aix zos
 // +build !appengine
 
 package isatty

vendor/github.com/mattn/go-isatty/isatty_windows.go

@@ -1,5 +1,5 @@
-// +build windows
+//go:build windows && !appengine
-// +build !appengine
+// +build windows,!appengine
 
 package isatty
 
@@ -76,7 +76,7 @@ func isCygwinPipeName(name string) bool {
 }
 
 // getFileNameByHandle use the undocomented ntdll NtQueryObject to get file full name from file handler
-// since GetFileInformationByHandleEx is not avilable under windows Vista and still some old fashion
+// since GetFileInformationByHandleEx is not available under windows Vista and still some old fashion
 // guys are using Windows XP, this is a workaround for those guys, it will also work on system from
 // Windows vista to 10
 // see https://stackoverflow.com/a/18792477 for details

vendor/github.com/mattn/go-isatty/renovate.json

@@ -1,8 +0,0 @@
-{
-  "extends": [
-    "config:base"
-  ],
-  "postUpdateOptions": [
-    "gomodTidy"
-  ]
-}

vendor/github.com/mitchellh/mapstructure/CHANGELOG.md

@@ -1,6 +1,16 @@
-## unreleased
+## 1.4.3
 
-* Fix regression where `*time.Time` value would be set to empty and not be sent 
+* Fix cases where `json.Number` didn't decode properly [GH-261]
+
+## 1.4.2
+
+* Custom name matchers to support any sort of casing, formatting, etc. for
+  field names. [GH-250]
+* Fix possible panic in ComposeDecodeHookFunc [GH-251]
+
+## 1.4.1
+
+* Fix regression where `*time.Time` value would be set to empty and not be sent
   to decode hooks properly [GH-232]
 
 ## 1.4.0

vendor/github.com/mitchellh/mapstructure/decode_hooks.go

@@ -62,7 +62,8 @@ func DecodeHookExec(
 func ComposeDecodeHookFunc(fs ...DecodeHookFunc) DecodeHookFunc {
 	return func(f reflect.Value, t reflect.Value) (interface{}, error) {
 		var err error
-		var data interface{}
+		data := f.Interface()
+
 		newFrom := f
 		for _, f1 := range fs {
 			data, err = DecodeHookExec(f1, newFrom, t)

vendor/github.com/mitchellh/mapstructure/mapstructure.go

@@ -192,7 +192,7 @@ type DecodeHookFuncType func(reflect.Type, reflect.Type, interface{}) (interface
 // source and target types.
 type DecodeHookFuncKind func(reflect.Kind, reflect.Kind, interface{}) (interface{}, error)
 
-// DecodeHookFuncRaw is a DecodeHookFunc which has complete access to both the source and target
+// DecodeHookFuncValue is a DecodeHookFunc which has complete access to both the source and target
 // values.
 type DecodeHookFuncValue func(from reflect.Value, to reflect.Value) (interface{}, error)
 
@@ -258,6 +258,11 @@ type DecoderConfig struct {
 	// The tag name that mapstructure reads for field names. This
 	// defaults to "mapstructure"
 	TagName string
+
+	// MatchName is the function used to match the map key to the struct
+	// field name or tag. Defaults to `strings.EqualFold`. This can be used
+	// to implement case-sensitive tag values, support snake casing, etc.
+	MatchName func(mapKey, fieldName string) bool
 }
 
 // A Decoder takes a raw interface value and turns it into structured
@@ -376,6 +381,10 @@ func NewDecoder(config *DecoderConfig) (*Decoder, error) {
 		config.TagName = "mapstructure"
 	}
 
+	if config.MatchName == nil {
+		config.MatchName = strings.EqualFold
+	}
+
 	result := &Decoder{
 		config: config,
 	}
@@ -675,16 +684,12 @@ func (d *Decoder) decodeUint(name string, data interface{}, val reflect.Value) e
 		}
 	case dataType.PkgPath() == "encoding/json" && dataType.Name() == "Number":
 		jn := data.(json.Number)
-		i, err := jn.Int64()
+		i, err := strconv.ParseUint(string(jn), 0, 64)
 		if err != nil {
 			return fmt.Errorf(
 				"error decoding json.Number into %s: %s", name, err)
 		}
-		if i < 0 && !d.config.WeaklyTypedInput {
+		val.SetUint(i)
-			return fmt.Errorf("cannot parse '%s', %d overflows uint",
-				name, i)
-		}
-		val.SetUint(uint64(i))
 	default:
 		return fmt.Errorf(
 			"'%s' expected type '%s', got unconvertible type '%s', value: '%v'",
@@ -1340,7 +1345,7 @@ func (d *Decoder) decodeStructFromMap(name string, dataVal, val reflect.Value) e
 					continue
 				}
 
-				if strings.EqualFold(mK, fieldName) {
+				if d.config.MatchName(mK, fieldName) {
 					rawMapKey = dataValKey
 					rawMapVal = dataVal.MapIndex(dataValKey)
 					break

vendor/github.com/opencontainers/image-spec/specs-go/v1/annotations.go

@@ -53,4 +53,10 @@ const (
 
 	// AnnotationDescription is the annotation key for the human-readable description of the software packaged in the image.
 	AnnotationDescription = "org.opencontainers.image.description"
+
+	// AnnotationBaseImageDigest is the annotation key for the digest of the image's base image.
+	AnnotationBaseImageDigest = "org.opencontainers.image.base.digest"
+
+	// AnnotationBaseImageName is the annotation key for the image reference of the image's base image.
+	AnnotationBaseImageName = "org.opencontainers.image.base.name"
 )

vendor/github.com/opencontainers/image-spec/specs-go/v1/config.go

@@ -89,9 +89,20 @@ type Image struct {
 	// Architecture is the CPU architecture which the binaries in this image are built to run on.
 	Architecture string `json:"architecture"`
 
+	// Variant is the variant of the specified CPU architecture which image binaries are intended to run on.
+	Variant string `json:"variant,omitempty"`
+
 	// OS is the name of the operating system which the image is built to run on.
 	OS string `json:"os"`
 
+	// OSVersion is an optional field specifying the operating system
+	// version, for example on Windows `10.0.14393.1066`.
+	OSVersion string `json:"os.version,omitempty"`
+
+	// OSFeatures is an optional field specifying an array of strings,
+	// each listing a required OS feature (for example on Windows `win32k`).
+	OSFeatures []string `json:"os.features,omitempty"`
+
 	// Config defines the execution parameters which should be used as a base when running a container using the image.
 	Config ImageConfig `json:"config,omitempty"`
 

vendor/github.com/opencontainers/image-spec/specs-go/v1/index.go

@@ -21,6 +21,9 @@ import "github.com/opencontainers/image-spec/specs-go"
 type Index struct {
 	specs.Versioned
 
+	// MediaType specificies the type of this document data structure e.g. `application/vnd.oci.image.index.v1+json`
+	MediaType string `json:"mediaType,omitempty"`
+
 	// Manifests references platform specific manifests.
 	Manifests []Descriptor `json:"manifests"`
 

vendor/github.com/opencontainers/image-spec/specs-go/v1/manifest.go

@@ -20,6 +20,9 @@ import "github.com/opencontainers/image-spec/specs-go"
 type Manifest struct {
 	specs.Versioned
 
+	// MediaType specificies the type of this document data structure e.g. `application/vnd.oci.image.manifest.v1+json`
+	MediaType string `json:"mediaType,omitempty"`
+
 	// Config references a configuration object for a container, by digest.
 	// The referenced configuration object is a JSON blob that the runtime uses to set up the container.
 	Config Descriptor `json:"config"`

vendor/github.com/opencontainers/image-spec/specs-go/v1/mediatype.go

@@ -34,6 +34,10 @@ const (
 	// referenced by the manifest.
 	MediaTypeImageLayerGzip = "application/vnd.oci.image.layer.v1.tar+gzip"
 
+	// MediaTypeImageLayerZstd is the media type used for zstd compressed
+	// layers referenced by the manifest.
+	MediaTypeImageLayerZstd = "application/vnd.oci.image.layer.v1.tar+zstd"
+
 	// MediaTypeImageLayerNonDistributable is the media type for layers referenced by
 	// the manifest but with distribution restrictions.
 	MediaTypeImageLayerNonDistributable = "application/vnd.oci.image.layer.nondistributable.v1.tar"
@@ -43,6 +47,11 @@ const (
 	// restrictions.
 	MediaTypeImageLayerNonDistributableGzip = "application/vnd.oci.image.layer.nondistributable.v1.tar+gzip"
 
+	// MediaTypeImageLayerNonDistributableZstd is the media type for zstd
+	// compressed layers referenced by the manifest but with distribution
+	// restrictions.
+	MediaTypeImageLayerNonDistributableZstd = "application/vnd.oci.image.layer.nondistributable.v1.tar+zstd"
+
 	// MediaTypeImageConfig specifies the media type for the image configuration.
 	MediaTypeImageConfig = "application/vnd.oci.image.config.v1+json"
 )

vendor/github.com/opencontainers/image-spec/specs-go/version.go

@@ -22,10 +22,10 @@ const (
 	// VersionMinor is for functionality in a backwards-compatible manner
 	VersionMinor = 0
 	// VersionPatch is for backwards-compatible bug fixes
-	VersionPatch = 1
+	VersionPatch = 2
 
 	// VersionDev indicates development branch. Releases will be empty string.
-	VersionDev = ""
+	VersionDev = "-dev"
 )
 
 // Version is the specification version that the package types support.

vendor/github.com/russross/blackfriday/v2/README.md

@@ -1,4 +1,6 @@
-Blackfriday [![Build Status](https://travis-ci.org/russross/blackfriday.svg?branch=master)](https://travis-ci.org/russross/blackfriday)
+Blackfriday
+[![Build Status][BuildV2SVG]][BuildV2URL]
+[![PkgGoDev][PkgGoDevV2SVG]][PkgGoDevV2URL]
 ===========
 
 Blackfriday is a [Markdown][1] processor implemented in [Go][2]. It
@@ -16,19 +18,21 @@ It started as a translation from C of [Sundown][3].
 Installation
 ------------
 
-Blackfriday is compatible with any modern Go release. With Go 1.7 and git
+Blackfriday is compatible with modern Go releases in module mode.
-installed:
+With Go installed:
 
-    go get gopkg.in/russross/blackfriday.v2
+    go get github.com/russross/blackfriday/v2
 
-will download, compile, and install the package into your `$GOPATH`
+will resolve and add the package to the current development module,
-directory hierarchy. Alternatively, you can achieve the same if you
+then build and install it. Alternatively, you can achieve the same
-import it into a project:
+if you import it in a package:
 
-    import "gopkg.in/russross/blackfriday.v2"
+    import "github.com/russross/blackfriday/v2"
 
 and `go get` without parameters.
 
+Legacy GOPATH mode is unsupported.
+
 
 Versions
 --------
@@ -36,13 +40,9 @@ Versions
 Currently maintained and recommended version of Blackfriday is `v2`. It's being
 developed on its own branch: https://github.com/russross/blackfriday/tree/v2 and the
 documentation is available at
-https://godoc.org/gopkg.in/russross/blackfriday.v2.
+https://pkg.go.dev/github.com/russross/blackfriday/v2.
 
-It is `go get`-able via via [gopkg.in][6] at `gopkg.in/russross/blackfriday.v2`,
+It is `go get`-able in module mode at `github.com/russross/blackfriday/v2`.
-but we highly recommend using package management tool like [dep][7] or
-[Glide][8] and make use of semantic versioning. With package management you
-should import `github.com/russross/blackfriday` and specify that you're using
-version 2.0.0.
 
 Version 2 offers a number of improvements over v1:
 
@@ -62,6 +62,11 @@ Potential drawbacks:
   v2. See issue [#348](https://github.com/russross/blackfriday/issues/348) for
   tracking.
 
+If you are still interested in the legacy `v1`, you can import it from
+`github.com/russross/blackfriday`. Documentation for the legacy v1 can be found
+here: https://pkg.go.dev/github.com/russross/blackfriday.
+
+
 Usage
 -----
 
@@ -91,7 +96,7 @@ Here's an example of simple usage of Blackfriday together with Bluemonday:
 ```go
 import (
     "github.com/microcosm-cc/bluemonday"
-    "github.com/russross/blackfriday"
+    "github.com/russross/blackfriday/v2"
 )
 
 // ...
@@ -104,6 +109,8 @@ html := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
 If you want to customize the set of options, use `blackfriday.WithExtensions`,
 `blackfriday.WithRenderer` and `blackfriday.WithRefOverride`.
 
+### `blackfriday-tool`
+
 You can also check out `blackfriday-tool` for a more complete example
 of how to use it. Download and install it using:
 
@@ -114,7 +121,7 @@ markdown file using a standalone program.  You can also browse the
 source directly on github if you are just looking for some example
 code:
 
-* <http://github.com/russross/blackfriday-tool>
+* <https://github.com/russross/blackfriday-tool>
 
 Note that if you have not already done so, installing
 `blackfriday-tool` will be sufficient to download and install
@@ -123,6 +130,22 @@ installed in `$GOPATH/bin`.  This is a statically-linked binary that
 can be copied to wherever you need it without worrying about
 dependencies and library versions.
 
+### Sanitized anchor names
+
+Blackfriday includes an algorithm for creating sanitized anchor names
+corresponding to a given input text. This algorithm is used to create
+anchors for headings when `AutoHeadingIDs` extension is enabled. The
+algorithm has a specification, so that other packages can create
+compatible anchor names and links to those anchors.
+
+The specification is located at https://pkg.go.dev/github.com/russross/blackfriday/v2#hdr-Sanitized_Anchor_Names.
+
+[`SanitizedAnchorName`](https://pkg.go.dev/github.com/russross/blackfriday/v2#SanitizedAnchorName) exposes this functionality, and can be used to
+create compatible links to the anchor names generated by blackfriday.
+This algorithm is also implemented in a small standalone package at
+[`github.com/shurcooL/sanitized_anchor_name`](https://pkg.go.dev/github.com/shurcooL/sanitized_anchor_name). It can be useful for clients
+that want a small package and don't need full functionality of blackfriday.
+
 
 Features
 --------
@@ -199,6 +222,15 @@ implements the following extensions:
     You can use 3 or more backticks to mark the beginning of the
     block, and the same number to mark the end of the block.
 
+    To preserve classes of fenced code blocks while using the bluemonday
+    HTML sanitizer, use the following policy:
+
+    ```go
+    p := bluemonday.UGCPolicy()
+    p.AllowAttrs("class").Matching(regexp.MustCompile("^language-[a-zA-Z0-9]+$")).OnElements("code")
+    html := p.SanitizeBytes(unsafe)
+    ```
+
 *   **Definition lists**. A simple definition list is made of a single-line
     term followed by a colon and the definition for that term.
 
@@ -250,7 +282,7 @@ Other renderers
 Blackfriday is structured to allow alternative rendering engines. Here
 are a few of note:
 
-*   [github_flavored_markdown](https://godoc.org/github.com/shurcooL/github_flavored_markdown):
+*   [github_flavored_markdown](https://pkg.go.dev/github.com/shurcooL/github_flavored_markdown):
     provides a GitHub Flavored Markdown renderer with fenced code block
     highlighting, clickable heading anchor links.
 
@@ -261,20 +293,28 @@ are a few of note:
 *   [markdownfmt](https://github.com/shurcooL/markdownfmt): like gofmt,
     but for markdown.
 
-*   [LaTeX output](https://github.com/Ambrevar/Blackfriday-LaTeX):
+*   [LaTeX output](https://gitlab.com/ambrevar/blackfriday-latex):
     renders output as LaTeX.
 
+*   [bfchroma](https://github.com/Depado/bfchroma/): provides convenience
+    integration with the [Chroma](https://github.com/alecthomas/chroma) code
+    highlighting library. bfchroma is only compatible with v2 of Blackfriday and
+    provides a drop-in renderer ready to use with Blackfriday, as well as
+    options and means for further customization.
+
 *   [Blackfriday-Confluence](https://github.com/kentaro-m/blackfriday-confluence): provides a [Confluence Wiki Markup](https://confluence.atlassian.com/doc/confluence-wiki-markup-251003035.html) renderer.
 
+*   [Blackfriday-Slack](https://github.com/karriereat/blackfriday-slack): converts markdown to slack message style
 
-Todo
+
+TODO
 ----
 
 *   More unit testing
-*   Improve unicode support. It does not understand all unicode
+*   Improve Unicode support. It does not understand all Unicode
     rules (about what constitutes a letter, a punctuation symbol,
     etc.), so it may fail to detect word boundaries correctly in
-    some instances. It is safe on all utf-8 input.
+    some instances. It is safe on all UTF-8 input.
 
 
 License
@@ -286,6 +326,10 @@ License
    [1]: https://daringfireball.net/projects/markdown/ "Markdown"
    [2]: https://golang.org/ "Go Language"
    [3]: https://github.com/vmg/sundown "Sundown"
-   [4]: https://godoc.org/gopkg.in/russross/blackfriday.v2#Parse "Parse func"
+   [4]: https://pkg.go.dev/github.com/russross/blackfriday/v2#Parse "Parse func"
    [5]: https://github.com/microcosm-cc/bluemonday "Bluemonday"
-   [6]: https://labix.org/gopkg.in "gopkg.in"
+
+   [BuildV2SVG]: https://travis-ci.org/russross/blackfriday.svg?branch=v2
+   [BuildV2URL]: https://travis-ci.org/russross/blackfriday
+   [PkgGoDevV2SVG]: https://pkg.go.dev/badge/github.com/russross/blackfriday/v2
+   [PkgGoDevV2URL]: https://pkg.go.dev/github.com/russross/blackfriday/v2

vendor/github.com/russross/blackfriday/v2/block.go

@@ -18,8 +18,7 @@ import (
 	"html"
 	"regexp"
 	"strings"
-
+	"unicode"
-	"github.com/shurcooL/sanitized_anchor_name"
 )
 
 const (
@@ -259,7 +258,7 @@ func (p *Markdown) prefixHeading(data []byte) int {
 	}
 	if end > i {
 		if id == "" && p.extensions&AutoHeadingIDs != 0 {
-			id = sanitized_anchor_name.Create(string(data[i:end]))
+			id = SanitizedAnchorName(string(data[i:end]))
 		}
 		block := p.addBlock(Heading, data[i:end])
 		block.HeadingID = id
@@ -673,6 +672,7 @@ func (p *Markdown) fencedCodeBlock(data []byte, doRender bool) int {
 	if beg == 0 || beg >= len(data) {
 		return 0
 	}
+	fenceLength := beg - 1
 
 	var work bytes.Buffer
 	work.Write([]byte(info))
@@ -706,6 +706,7 @@ func (p *Markdown) fencedCodeBlock(data []byte, doRender bool) int {
 	if doRender {
 		block := p.addBlock(CodeBlock, work.Bytes()) // TODO: get rid of temp buffer
 		block.IsFenced = true
+		block.FenceLength = fenceLength
 		finalizeCodeBlock(block)
 	}
 
@@ -1503,7 +1504,7 @@ func (p *Markdown) paragraph(data []byte) int {
 
 				id := ""
 				if p.extensions&AutoHeadingIDs != 0 {
-					id = sanitized_anchor_name.Create(string(data[prev:eol]))
+					id = SanitizedAnchorName(string(data[prev:eol]))
 				}
 
 				block := p.addBlock(Heading, data[prev:eol])
@@ -1588,3 +1589,24 @@ func skipUntilChar(text []byte, start int, char byte) int {
 	}
 	return i
 }
+
+// SanitizedAnchorName returns a sanitized anchor name for the given text.
+//
+// It implements the algorithm specified in the package comment.
+func SanitizedAnchorName(text string) string {
+	var anchorName []rune
+	futureDash := false
+	for _, r := range text {
+		switch {
+		case unicode.IsLetter(r) || unicode.IsNumber(r):
+			if futureDash && len(anchorName) > 0 {
+				anchorName = append(anchorName, '-')
+			}
+			futureDash = false
+			anchorName = append(anchorName, unicode.ToLower(r))
+		default:
+			futureDash = true
+		}
+	}
+	return string(anchorName)
+}

vendor/github.com/russross/blackfriday/v2/doc.go

@@ -15,4 +15,32 @@
 //
 // If you're interested in calling Blackfriday from command line, see
 // https://github.com/russross/blackfriday-tool.
+//
+// Sanitized Anchor Names
+//
+// Blackfriday includes an algorithm for creating sanitized anchor names
+// corresponding to a given input text. This algorithm is used to create
+// anchors for headings when AutoHeadingIDs extension is enabled. The
+// algorithm is specified below, so that other packages can create
+// compatible anchor names and links to those anchors.
+//
+// The algorithm iterates over the input text, interpreted as UTF-8,
+// one Unicode code point (rune) at a time. All runes that are letters (category L)
+// or numbers (category N) are considered valid characters. They are mapped to
+// lower case, and included in the output. All other runes are considered
+// invalid characters. Invalid characters that precede the first valid character,
+// as well as invalid character that follow the last valid character
+// are dropped completely. All other sequences of invalid characters
+// between two valid characters are replaced with a single dash character '-'.
+//
+// SanitizedAnchorName exposes this functionality, and can be used to
+// create compatible links to the anchor names generated by blackfriday.
+// This algorithm is also implemented in a small standalone package at
+// github.com/shurcooL/sanitized_anchor_name. It can be useful for clients
+// that want a small package and don't need full functionality of blackfriday.
 package blackfriday
+
+// NOTE: Keep Sanitized Anchor Name algorithm in sync with package
+//       github.com/shurcooL/sanitized_anchor_name.
+//       Otherwise, users of sanitized_anchor_name will get anchor names
+//       that are incompatible with those generated by blackfriday.

vendor/github.com/russross/blackfriday/v2/esc.go

@@ -13,13 +13,27 @@ var htmlEscaper = [256][]byte{
 }
 
 func escapeHTML(w io.Writer, s []byte) {
+	escapeEntities(w, s, false)
+}
+
+func escapeAllHTML(w io.Writer, s []byte) {
+	escapeEntities(w, s, true)
+}
+
+func escapeEntities(w io.Writer, s []byte, escapeValidEntities bool) {
 	var start, end int
 	for end < len(s) {
 		escSeq := htmlEscaper[s[end]]
 		if escSeq != nil {
-			w.Write(s[start:end])
+			isEntity, entityEnd := nodeIsEntity(s, end)
-			w.Write(escSeq)
+			if isEntity && !escapeValidEntities {
-			start = end + 1
+				w.Write(s[start : entityEnd+1])
+				start = entityEnd + 1
+			} else {
+				w.Write(s[start:end])
+				w.Write(escSeq)
+				start = end + 1
+			}
 		}
 		end++
 	}
@@ -28,6 +42,28 @@ func escapeHTML(w io.Writer, s []byte) {
 	}
 }
 
+func nodeIsEntity(s []byte, end int) (isEntity bool, endEntityPos int) {
+	isEntity = false
+	endEntityPos = end + 1
+
+	if s[end] == '&' {
+		for endEntityPos < len(s) {
+			if s[endEntityPos] == ';' {
+				if entities[string(s[end:endEntityPos+1])] {
+					isEntity = true
+					break
+				}
+			}
+			if !isalnum(s[endEntityPos]) && s[endEntityPos] != '&' && s[endEntityPos] != '#' {
+				break
+			}
+			endEntityPos++
+		}
+	}
+
+	return isEntity, endEntityPos
+}
+
 func escLink(w io.Writer, text []byte) {
 	unesc := html.UnescapeString(string(text))
 	escapeHTML(w, []byte(unesc))

vendor/github.com/russross/blackfriday/v2/html.go

@@ -132,7 +132,10 @@ func NewHTMLRenderer(params HTMLRendererParameters) *HTMLRenderer {
 	}
 
 	if params.FootnoteReturnLinkContents == "" {
-		params.FootnoteReturnLinkContents = `<sup>[return]</sup>`
+		// U+FE0E is VARIATION SELECTOR-15.
+		// It suppresses automatic emoji presentation of the preceding
+		// U+21A9 LEFTWARDS ARROW WITH HOOK on iOS and iPadOS.
+		params.FootnoteReturnLinkContents = "<span aria-label='Return'>↩\ufe0e</span>"
 	}
 
 	return &HTMLRenderer{
@@ -616,7 +619,7 @@ func (r *HTMLRenderer) RenderNode(w io.Writer, node *Node, entering bool) WalkSt
 		}
 	case Code:
 		r.out(w, codeTag)
-		escapeHTML(w, node.Literal)
+		escapeAllHTML(w, node.Literal)
 		r.out(w, codeCloseTag)
 	case Document:
 		break
@@ -762,7 +765,7 @@ func (r *HTMLRenderer) RenderNode(w io.Writer, node *Node, entering bool) WalkSt
 		r.cr(w)
 		r.out(w, preTag)
 		r.tag(w, codeTag[:len(codeTag)-1], attrs)
-		escapeHTML(w, node.Literal)
+		escapeAllHTML(w, node.Literal)
 		r.out(w, codeCloseTag)
 		r.out(w, preCloseTag)
 		if node.Parent.Type != Item {

vendor/github.com/russross/blackfriday/v2/inline.go

@@ -278,7 +278,7 @@ func link(p *Markdown, data []byte, offset int) (int, *Node) {
 		case data[i] == '\n':
 			textHasNl = true
 
-		case data[i-1] == '\\':
+		case isBackslashEscaped(data, i):
 			continue
 
 		case data[i] == '[':

vendor/github.com/russross/blackfriday/v2/node.go

@@ -199,7 +199,8 @@ func (n *Node) InsertBefore(sibling *Node) {
 	}
 }
 
-func (n *Node) isContainer() bool {
+// IsContainer returns true if 'n' can contain children.
+func (n *Node) IsContainer() bool {
 	switch n.Type {
 	case Document:
 		fallthrough
@@ -238,6 +239,11 @@ func (n *Node) isContainer() bool {
 	}
 }
 
+// IsLeaf returns true if 'n' is a leaf node.
+func (n *Node) IsLeaf() bool {
+	return !n.IsContainer()
+}
+
 func (n *Node) canContain(t NodeType) bool {
 	if n.Type == List {
 		return t == Item
@@ -309,11 +315,11 @@ func newNodeWalker(root *Node) *nodeWalker {
 }
 
 func (nw *nodeWalker) next() {
-	if (!nw.current.isContainer() || !nw.entering) && nw.current == nw.root {
+	if (!nw.current.IsContainer() || !nw.entering) && nw.current == nw.root {
 		nw.current = nil
 		return
 	}
-	if nw.entering && nw.current.isContainer() {
+	if nw.entering && nw.current.IsContainer() {
 		if nw.current.FirstChild != nil {
 			nw.current = nw.current.FirstChild
 			nw.entering = true

vendor/github.com/shurcooL/sanitized_anchor_name/.travis.yml

@@ -1,16 +0,0 @@
-sudo: false
-language: go
-go:
-  - 1.x
-  - master
-matrix:
-  allow_failures:
-    - go: master
-  fast_finish: true
-install:
-  - # Do nothing. This is needed to prevent default install action "go get -t -v ./..." from happening here (we want it to happen inside script step).
-script:
-  - go get -t -v ./...
-  - diff -u <(echo -n) <(gofmt -d -s .)
-  - go tool vet .
-  - go test -v -race ./...

vendor/github.com/shurcooL/sanitized_anchor_name/LICENSE

@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2015 Dmitri Shuralyov
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

vendor/github.com/shurcooL/sanitized_anchor_name/README.md

@@ -1,36 +0,0 @@
-sanitized_anchor_name
-=====================
-
-[![Build Status](https://travis-ci.org/shurcooL/sanitized_anchor_name.svg?branch=master)](https://travis-ci.org/shurcooL/sanitized_anchor_name) [![GoDoc](https://godoc.org/github.com/shurcooL/sanitized_anchor_name?status.svg)](https://godoc.org/github.com/shurcooL/sanitized_anchor_name)
-
-Package sanitized_anchor_name provides a func to create sanitized anchor names.
-
-Its logic can be reused by multiple packages to create interoperable anchor names
-and links to those anchors.
-
-At this time, it does not try to ensure that generated anchor names
-are unique, that responsibility falls on the caller.
-
-Installation
-------------
-
-```bash
-go get -u github.com/shurcooL/sanitized_anchor_name
-```
-
-Example
--------
-
-```Go
-anchorName := sanitized_anchor_name.Create("This is a header")
-
-fmt.Println(anchorName)
-
-// Output:
-// this-is-a-header
-```
-
-License
--------
-
--	[MIT License](LICENSE)

vendor/github.com/shurcooL/sanitized_anchor_name/go.mod

@@ -1 +0,0 @@
-module github.com/shurcooL/sanitized_anchor_name

vendor/github.com/shurcooL/sanitized_anchor_name/main.go

@@ -1,29 +0,0 @@
-// Package sanitized_anchor_name provides a func to create sanitized anchor names.
-//
-// Its logic can be reused by multiple packages to create interoperable anchor names
-// and links to those anchors.
-//
-// At this time, it does not try to ensure that generated anchor names
-// are unique, that responsibility falls on the caller.
-package sanitized_anchor_name // import "github.com/shurcooL/sanitized_anchor_name"
-
-import "unicode"
-
-// Create returns a sanitized anchor name for the given text.
-func Create(text string) string {
-	var anchorName []rune
-	var futureDash = false
-	for _, r := range text {
-		switch {
-		case unicode.IsLetter(r) || unicode.IsNumber(r):
-			if futureDash && len(anchorName) > 0 {
-				anchorName = append(anchorName, '-')
-			}
-			futureDash = false
-			anchorName = append(anchorName, unicode.ToLower(r))
-		default:
-			futureDash = true
-		}
-	}
-	return string(anchorName)
-}

vendor/golang.org/x/net/html/parse.go

@@ -663,6 +663,24 @@ func inHeadIM(p *parser) bool {
 			// Ignore the token.
 			return true
 		case a.Template:
+			// TODO: remove this divergence from the HTML5 spec.
+			//
+			// We don't handle all of the corner cases when mixing foreign
+			// content (i.e. <math> or <svg>) with <template>. Without this
+			// early return, we can get into an infinite loop, possibly because
+			// of the "TODO... further divergence" a little below.
+			//
+			// As a workaround, if we are mixing foreign content and templates,
+			// just ignore the rest of the HTML. Foreign content is rare and a
+			// relatively old HTML feature. Templates are also rare and a
+			// relatively new HTML feature. Their combination is very rare.
+			for _, e := range p.oe {
+				if e.Namespace != "" {
+					p.im = ignoreTheRemainingTokens
+					return true
+				}
+			}
+
 			p.addElement()
 			p.afe = append(p.afe, &scopeMarker)
 			p.framesetOK = false
@@ -683,7 +701,7 @@ func inHeadIM(p *parser) bool {
 			if !p.oe.contains(a.Template) {
 				return true
 			}
-			// TODO: remove this divergence from the HTML5 spec.
+			// TODO: remove this further divergence from the HTML5 spec.
 			//
 			// See https://bugs.chromium.org/p/chromium/issues/detail?id=829668
 			p.generateImpliedEndTags()
@@ -2127,6 +2145,10 @@ func afterAfterFramesetIM(p *parser) bool {
 	return true
 }
 
+func ignoreTheRemainingTokens(p *parser) bool {
+	return true
+}
+
 const whitespaceOrNUL = whitespace + "\x00"
 
 // Section 12.2.6.5

vendor/golang.org/x/net/http/httpguts/httplex.go

@@ -137,11 +137,13 @@ func trimOWS(x string) string {
 // contains token amongst its comma-separated tokens, ASCII
 // case-insensitively.
 func headerValueContainsToken(v string, token string) bool {
-	v = trimOWS(v)
+	for comma := strings.IndexByte(v, ','); comma != -1; comma = strings.IndexByte(v, ',') {
-	if comma := strings.IndexByte(v, ','); comma != -1 {
+		if tokenEqual(trimOWS(v[:comma]), token) {
-		return tokenEqual(trimOWS(v[:comma]), token) || headerValueContainsToken(v[comma+1:], token)
+			return true
+		}
+		v = v[comma+1:]
 	}
-	return tokenEqual(v, token)
+	return tokenEqual(trimOWS(v), token)
 }
 
 // lowerASCII returns the ASCII lowercase version of b.

vendor/golang.org/x/net/http2/Dockerfile

@@ -38,7 +38,7 @@ RUN make
 RUN make install
 
 WORKDIR /root
-RUN wget http://curl.haxx.se/download/curl-7.45.0.tar.gz
+RUN wget https://curl.se/download/curl-7.45.0.tar.gz
 RUN tar -zxvf curl-7.45.0.tar.gz
 WORKDIR /root/curl-7.45.0
 RUN ./configure --with-ssl --with-nghttp2=/usr/local

vendor/golang.org/x/net/http2/README

@@ -1,20 +0,0 @@
-This is a work-in-progress HTTP/2 implementation for Go.
-
-It will eventually live in the Go standard library and won't require
-any changes to your code to use.  It will just be automatic.
-
-Status:
-
-* The server support is pretty good. A few things are missing
-  but are being worked on.
-* The client work has just started but shares a lot of code
-  is coming along much quicker.
-
-Docs are at https://godoc.org/golang.org/x/net/http2
-
-Demo test server at https://http2.golang.org/
-
-Help & bug reports welcome!
-
-Contributing: https://golang.org/doc/contribute.html
-Bugs:         https://golang.org/issue/new?title=x/net/http2:+

vendor/golang.org/x/net/http2/ascii.go

@@ -0,0 +1,53 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package http2
+
+import "strings"
+
+// The HTTP protocols are defined in terms of ASCII, not Unicode. This file
+// contains helper functions which may use Unicode-aware functions which would
+// otherwise be unsafe and could introduce vulnerabilities if used improperly.
+
+// asciiEqualFold is strings.EqualFold, ASCII only. It reports whether s and t
+// are equal, ASCII-case-insensitively.
+func asciiEqualFold(s, t string) bool {
+	if len(s) != len(t) {
+		return false
+	}
+	for i := 0; i < len(s); i++ {
+		if lower(s[i]) != lower(t[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+// lower returns the ASCII lowercase version of b.
+func lower(b byte) byte {
+	if 'A' <= b && b <= 'Z' {
+		return b + ('a' - 'A')
+	}
+	return b
+}
+
+// isASCIIPrint returns whether s is ASCII and printable according to
+// https://tools.ietf.org/html/rfc20#section-4.2.
+func isASCIIPrint(s string) bool {
+	for i := 0; i < len(s); i++ {
+		if s[i] < ' ' || s[i] > '~' {
+			return false
+		}
+	}
+	return true
+}
+
+// asciiToLower returns the lowercase version of s if s is ASCII and printable,
+// and whether or not it was.
+func asciiToLower(s string) (lower string, ok bool) {
+	if !isASCIIPrint(s) {
+		return "", false
+	}
+	return strings.ToLower(s), true
+}

vendor/golang.org/x/net/http2/client_conn_pool.go

@@ -7,13 +7,21 @@
 package http2
 
 import (
+	"context"
 	"crypto/tls"
+	"errors"
 	"net/http"
 	"sync"
 )
 
 // ClientConnPool manages a pool of HTTP/2 client connections.
 type ClientConnPool interface {
+	// GetClientConn returns a specific HTTP/2 connection (usually
+	// a TLS-TCP connection) to an HTTP/2 server. On success, the
+	// returned ClientConn accounts for the upcoming RoundTrip
+	// call, so the caller should not omit it. If the caller needs
+	// to, ClientConn.RoundTrip can be called with a bogus
+	// new(http.Request) to release the stream reservation.
 	GetClientConn(req *http.Request, addr string) (*ClientConn, error)
 	MarkDead(*ClientConn)
 }
@@ -40,7 +48,7 @@ type clientConnPool struct {
 	conns        map[string][]*ClientConn // key is host:port
 	dialing      map[string]*dialCall     // currently in-flight dials
 	keys         map[*ClientConn][]string
-	addConnCalls map[string]*addConnCall // in-flight addConnIfNeede calls
+	addConnCalls map[string]*addConnCall // in-flight addConnIfNeeded calls
 }
 
 func (p *clientConnPool) GetClientConn(req *http.Request, addr string) (*ClientConn, error) {
@@ -52,87 +60,85 @@ const (
 	noDialOnMiss = false
 )
 
-// shouldTraceGetConn reports whether getClientConn should call any
-// ClientTrace.GetConn hook associated with the http.Request.
-//
-// This complexity is needed to avoid double calls of the GetConn hook
-// during the back-and-forth between net/http and x/net/http2 (when the
-// net/http.Transport is upgraded to also speak http2), as well as support
-// the case where x/net/http2 is being used directly.
-func (p *clientConnPool) shouldTraceGetConn(st clientConnIdleState) bool {
-	// If our Transport wasn't made via ConfigureTransport, always
-	// trace the GetConn hook if provided, because that means the
-	// http2 package is being used directly and it's the one
-	// dialing, as opposed to net/http.
-	if _, ok := p.t.ConnPool.(noDialClientConnPool); !ok {
-		return true
-	}
-	// Otherwise, only use the GetConn hook if this connection has
-	// been used previously for other requests. For fresh
-	// connections, the net/http package does the dialing.
-	return !st.freshConn
-}
-
 func (p *clientConnPool) getClientConn(req *http.Request, addr string, dialOnMiss bool) (*ClientConn, error) {
+	// TODO(dneil): Dial a new connection when t.DisableKeepAlives is set?
 	if isConnectionCloseRequest(req) && dialOnMiss {
 		// It gets its own connection.
 		traceGetConn(req, addr)
 		const singleUse = true
-		cc, err := p.t.dialClientConn(addr, singleUse)
+		cc, err := p.t.dialClientConn(req.Context(), addr, singleUse)
 		if err != nil {
 			return nil, err
 		}
 		return cc, nil
 	}
-	p.mu.Lock()
+	for {
-	for _, cc := range p.conns[addr] {
+		p.mu.Lock()
-		if st := cc.idleState(); st.canTakeNewRequest {
+		for _, cc := range p.conns[addr] {
-			if p.shouldTraceGetConn(st) {
+			if cc.ReserveNewRequest() {
-				traceGetConn(req, addr)
+				// When a connection is presented to us by the net/http package,
+				// the GetConn hook has already been called.
+				// Don't call it a second time here.
+				if !cc.getConnCalled {
+					traceGetConn(req, addr)
+				}
+				cc.getConnCalled = false
+				p.mu.Unlock()
+				return cc, nil
 			}
+		}
+		if !dialOnMiss {
 			p.mu.Unlock()
+			return nil, ErrNoCachedConn
+		}
+		traceGetConn(req, addr)
+		call := p.getStartDialLocked(req.Context(), addr)
+		p.mu.Unlock()
+		<-call.done
+		if shouldRetryDial(call, req) {
+			continue
+		}
+		cc, err := call.res, call.err
+		if err != nil {
+			return nil, err
+		}
+		if cc.ReserveNewRequest() {
 			return cc, nil
 		}
 	}
-	if !dialOnMiss {
-		p.mu.Unlock()
-		return nil, ErrNoCachedConn
-	}
-	traceGetConn(req, addr)
-	call := p.getStartDialLocked(addr)
-	p.mu.Unlock()
-	<-call.done
-	return call.res, call.err
 }
 
 // dialCall is an in-flight Transport dial call to a host.
 type dialCall struct {
-	_    incomparable
+	_ incomparable
-	p    *clientConnPool
+	p *clientConnPool
+	// the context associated with the request
+	// that created this dialCall
+	ctx  context.Context
 	done chan struct{} // closed when done
 	res  *ClientConn   // valid after done is closed
 	err  error         // valid after done is closed
 }
 
 // requires p.mu is held.
-func (p *clientConnPool) getStartDialLocked(addr string) *dialCall {
+func (p *clientConnPool) getStartDialLocked(ctx context.Context, addr string) *dialCall {
 	if call, ok := p.dialing[addr]; ok {
 		// A dial is already in-flight. Don't start another.
 		return call
 	}
-	call := &dialCall{p: p, done: make(chan struct{})}
+	call := &dialCall{p: p, done: make(chan struct{}), ctx: ctx}
 	if p.dialing == nil {
 		p.dialing = make(map[string]*dialCall)
 	}
 	p.dialing[addr] = call
-	go call.dial(addr)
+	go call.dial(call.ctx, addr)
 	return call
 }
 
 // run in its own goroutine.
-func (c *dialCall) dial(addr string) {
+func (c *dialCall) dial(ctx context.Context, addr string) {
 	const singleUse = false // shared conn
-	c.res, c.err = c.p.t.dialClientConn(addr, singleUse)
+	c.res, c.err = c.p.t.dialClientConn(ctx, addr, singleUse)
 	close(c.done)
 
 	c.p.mu.Lock()
@@ -195,6 +201,7 @@ func (c *addConnCall) run(t *Transport, key string, tc *tls.Conn) {
 	if err != nil {
 		c.err = err
 	} else {
+		cc.getConnCalled = true // already called by the net/http package
 		p.addConnLocked(key, cc)
 	}
 	delete(p.addConnCalls, key)
@@ -276,3 +283,28 @@ type noDialClientConnPool struct{ *clientConnPool }
 func (p noDialClientConnPool) GetClientConn(req *http.Request, addr string) (*ClientConn, error) {
 	return p.getClientConn(req, addr, noDialOnMiss)
 }
+
+// shouldRetryDial reports whether the current request should
+// retry dialing after the call finished unsuccessfully, for example
+// if the dial was canceled because of a context cancellation or
+// deadline expiry.
+func shouldRetryDial(call *dialCall, req *http.Request) bool {
+	if call.err == nil {
+		// No error, no need to retry
+		return false
+	}
+	if call.ctx == req.Context() {
+		// If the call has the same context as the request, the dial
+		// should not be retried, since any cancellation will have come
+		// from this request.
+		return false
+	}
+	if !errors.Is(call.err, context.Canceled) && !errors.Is(call.err, context.DeadlineExceeded) {
+		// If the call error is not because of a context cancellation or a deadline expiry,
+		// the dial should not be retried.
+		return false
+	}
+	// Only retry if the error is a context cancellation error or deadline expiry
+	// and the context associated with the call was canceled or expired.
+	return call.ctx.Err() != nil
+}

vendor/golang.org/x/net/http2/errors.go

@@ -53,6 +53,13 @@ func (e ErrCode) String() string {
 	return fmt.Sprintf("unknown error code 0x%x", uint32(e))
 }
 
+func (e ErrCode) stringToken() string {
+	if s, ok := errCodeName[e]; ok {
+		return s
+	}
+	return fmt.Sprintf("ERR_UNKNOWN_%d", uint32(e))
+}
+
 // ConnectionError is an error that results in the termination of the
 // entire connection.
 type ConnectionError ErrCode
@@ -67,6 +74,11 @@ type StreamError struct {
 	Cause    error // optional additional detail
 }
 
+// errFromPeer is a sentinel error value for StreamError.Cause to
+// indicate that the StreamError was sent from the peer over the wire
+// and wasn't locally generated in the Transport.
+var errFromPeer = errors.New("received from peer")
+
 func streamError(id uint32, code ErrCode) StreamError {
 	return StreamError{StreamID: id, Code: code}
 }

vendor/golang.org/x/net/http2/frame.go

@@ -122,7 +122,7 @@ var flagName = map[FrameType]map[Flags]string{
 // a frameParser parses a frame given its FrameHeader and payload
 // bytes. The length of payload will always equal fh.Length (which
 // might be 0).
-type frameParser func(fc *frameCache, fh FrameHeader, payload []byte) (Frame, error)
+type frameParser func(fc *frameCache, fh FrameHeader, countError func(string), payload []byte) (Frame, error)
 
 var frameParsers = map[FrameType]frameParser{
 	FrameData:         parseDataFrame,
@@ -267,6 +267,11 @@ type Framer struct {
 	lastFrame Frame
 	errDetail error
 
+	// countError is a non-nil func that's called on a frame parse
+	// error with some unique error path token. It's initialized
+	// from Transport.CountError or Server.CountError.
+	countError func(errToken string)
+
 	// lastHeaderStream is non-zero if the last frame was an
 	// unfinished HEADERS/CONTINUATION.
 	lastHeaderStream uint32
@@ -426,6 +431,7 @@ func NewFramer(w io.Writer, r io.Reader) *Framer {
 	fr := &Framer{
 		w:                 w,
 		r:                 r,
+		countError:        func(string) {},
 		logReads:          logFrameReads,
 		logWrites:         logFrameWrites,
 		debugReadLoggerf:  log.Printf,
@@ -500,7 +506,7 @@ func (fr *Framer) ReadFrame() (Frame, error) {
 	if _, err := io.ReadFull(fr.r, payload); err != nil {
 		return nil, err
 	}
-	f, err := typeFrameParser(fh.Type)(fr.frameCache, fh, payload)
+	f, err := typeFrameParser(fh.Type)(fr.frameCache, fh, fr.countError, payload)
 	if err != nil {
 		if ce, ok := err.(connError); ok {
 			return nil, fr.connError(ce.Code, ce.Reason)
@@ -588,13 +594,14 @@ func (f *DataFrame) Data() []byte {
 	return f.data
 }
 
-func parseDataFrame(fc *frameCache, fh FrameHeader, payload []byte) (Frame, error) {
+func parseDataFrame(fc *frameCache, fh FrameHeader, countError func(string), payload []byte) (Frame, error) {
 	if fh.StreamID == 0 {
 		// DATA frames MUST be associated with a stream. If a
 		// DATA frame is received whose stream identifier
 		// field is 0x0, the recipient MUST respond with a
 		// connection error (Section 5.4.1) of type
 		// PROTOCOL_ERROR.
+		countError("frame_data_stream_0")
 		return nil, connError{ErrCodeProtocol, "DATA frame with stream ID 0"}
 	}
 	f := fc.getDataFrame()
@@ -605,6 +612,7 @@ func parseDataFrame(fc *frameCache, fh FrameHeader, payload []byte) (Frame, erro
 		var err error
 		payload, padSize, err = readByte(payload)
 		if err != nil {
+			countError("frame_data_pad_byte_short")
 			return nil, err
 		}
 	}
@@ -613,6 +621,7 @@ func parseDataFrame(fc *frameCache, fh FrameHeader, payload []byte) (Frame, erro
 		// length of the frame payload, the recipient MUST
 		// treat this as a connection error.
 		// Filed: https://github.com/http2/http2-spec/issues/610
+		countError("frame_data_pad_too_big")
 		return nil, connError{ErrCodeProtocol, "pad size larger than data payload"}
 	}
 	f.data = payload[:len(payload)-int(padSize)]
@@ -695,7 +704,7 @@ type SettingsFrame struct {
 	p []byte
 }
 
-func parseSettingsFrame(_ *frameCache, fh FrameHeader, p []byte) (Frame, error) {
+func parseSettingsFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) {
 	if fh.Flags.Has(FlagSettingsAck) && fh.Length > 0 {
 		// When this (ACK 0x1) bit is set, the payload of the
 		// SETTINGS frame MUST be empty. Receipt of a
@@ -703,6 +712,7 @@ func parseSettingsFrame(_ *frameCache, fh FrameHeader, p []byte) (Frame, error)
 		// field value other than 0 MUST be treated as a
 		// connection error (Section 5.4.1) of type
 		// FRAME_SIZE_ERROR.
+		countError("frame_settings_ack_with_length")
 		return nil, ConnectionError(ErrCodeFrameSize)
 	}
 	if fh.StreamID != 0 {
@@ -713,14 +723,17 @@ func parseSettingsFrame(_ *frameCache, fh FrameHeader, p []byte) (Frame, error)
 		// field is anything other than 0x0, the endpoint MUST
 		// respond with a connection error (Section 5.4.1) of
 		// type PROTOCOL_ERROR.
+		countError("frame_settings_has_stream")
 		return nil, ConnectionError(ErrCodeProtocol)
 	}
 	if len(p)%6 != 0 {
+		countError("frame_settings_mod_6")
 		// Expecting even number of 6 byte settings.
 		return nil, ConnectionError(ErrCodeFrameSize)
 	}
 	f := &SettingsFrame{FrameHeader: fh, p: p}
 	if v, ok := f.Value(SettingInitialWindowSize); ok && v > (1<<31)-1 {
+		countError("frame_settings_window_size_too_big")
 		// Values above the maximum flow control window size of 2^31 - 1 MUST
 		// be treated as a connection error (Section 5.4.1) of type
 		// FLOW_CONTROL_ERROR.
@@ -832,11 +845,13 @@ type PingFrame struct {
 
 func (f *PingFrame) IsAck() bool { return f.Flags.Has(FlagPingAck) }
 
-func parsePingFrame(_ *frameCache, fh FrameHeader, payload []byte) (Frame, error) {
+func parsePingFrame(_ *frameCache, fh FrameHeader, countError func(string), payload []byte) (Frame, error) {
 	if len(payload) != 8 {
+		countError("frame_ping_length")
 		return nil, ConnectionError(ErrCodeFrameSize)
 	}
 	if fh.StreamID != 0 {
+		countError("frame_ping_has_stream")
 		return nil, ConnectionError(ErrCodeProtocol)
 	}
 	f := &PingFrame{FrameHeader: fh}
@@ -872,11 +887,13 @@ func (f *GoAwayFrame) DebugData() []byte {
 	return f.debugData
 }
 
-func parseGoAwayFrame(_ *frameCache, fh FrameHeader, p []byte) (Frame, error) {
+func parseGoAwayFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) {
 	if fh.StreamID != 0 {
+		countError("frame_goaway_has_stream")
 		return nil, ConnectionError(ErrCodeProtocol)
 	}
 	if len(p) < 8 {
+		countError("frame_goaway_short")
 		return nil, ConnectionError(ErrCodeFrameSize)
 	}
 	return &GoAwayFrame{
@@ -912,7 +929,7 @@ func (f *UnknownFrame) Payload() []byte {
 	return f.p
 }
 
-func parseUnknownFrame(_ *frameCache, fh FrameHeader, p []byte) (Frame, error) {
+func parseUnknownFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) {
 	return &UnknownFrame{fh, p}, nil
 }
 
@@ -923,8 +940,9 @@ type WindowUpdateFrame struct {
 	Increment uint32 // never read with high bit set
 }
 
-func parseWindowUpdateFrame(_ *frameCache, fh FrameHeader, p []byte) (Frame, error) {
+func parseWindowUpdateFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) {
 	if len(p) != 4 {
+		countError("frame_windowupdate_bad_len")
 		return nil, ConnectionError(ErrCodeFrameSize)
 	}
 	inc := binary.BigEndian.Uint32(p[:4]) & 0x7fffffff // mask off high reserved bit
@@ -936,8 +954,10 @@ func parseWindowUpdateFrame(_ *frameCache, fh FrameHeader, p []byte) (Frame, err
 		// control window MUST be treated as a connection
 		// error (Section 5.4.1).
 		if fh.StreamID == 0 {
+			countError("frame_windowupdate_zero_inc_conn")
 			return nil, ConnectionError(ErrCodeProtocol)
 		}
+		countError("frame_windowupdate_zero_inc_stream")
 		return nil, streamError(fh.StreamID, ErrCodeProtocol)
 	}
 	return &WindowUpdateFrame{
@@ -988,7 +1008,7 @@ func (f *HeadersFrame) HasPriority() bool {
 	return f.FrameHeader.Flags.Has(FlagHeadersPriority)
 }
 
-func parseHeadersFrame(_ *frameCache, fh FrameHeader, p []byte) (_ Frame, err error) {
+func parseHeadersFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (_ Frame, err error) {
 	hf := &HeadersFrame{
 		FrameHeader: fh,
 	}
@@ -997,11 +1017,13 @@ func parseHeadersFrame(_ *frameCache, fh FrameHeader, p []byte) (_ Frame, err er
 		// is received whose stream identifier field is 0x0, the recipient MUST
 		// respond with a connection error (Section 5.4.1) of type
 		// PROTOCOL_ERROR.
+		countError("frame_headers_zero_stream")
 		return nil, connError{ErrCodeProtocol, "HEADERS frame with stream ID 0"}
 	}
 	var padLength uint8
 	if fh.Flags.Has(FlagHeadersPadded) {
 		if p, padLength, err = readByte(p); err != nil {
+			countError("frame_headers_pad_short")
 			return
 		}
 	}
@@ -1009,16 +1031,19 @@ func parseHeadersFrame(_ *frameCache, fh FrameHeader, p []byte) (_ Frame, err er
 		var v uint32
 		p, v, err = readUint32(p)
 		if err != nil {
+			countError("frame_headers_prio_short")
 			return nil, err
 		}
 		hf.Priority.StreamDep = v & 0x7fffffff
 		hf.Priority.Exclusive = (v != hf.Priority.StreamDep) // high bit was set
 		p, hf.Priority.Weight, err = readByte(p)
 		if err != nil {
+			countError("frame_headers_prio_weight_short")
 			return nil, err
 		}
 	}
-	if len(p)-int(padLength) <= 0 {
+	if len(p)-int(padLength) < 0 {
+		countError("frame_headers_pad_too_big")
 		return nil, streamError(fh.StreamID, ErrCodeProtocol)
 	}
 	hf.headerFragBuf = p[:len(p)-int(padLength)]
@@ -1125,11 +1150,13 @@ func (p PriorityParam) IsZero() bool {
 	return p == PriorityParam{}
 }
 
-func parsePriorityFrame(_ *frameCache, fh FrameHeader, payload []byte) (Frame, error) {
+func parsePriorityFrame(_ *frameCache, fh FrameHeader, countError func(string), payload []byte) (Frame, error) {
 	if fh.StreamID == 0 {
+		countError("frame_priority_zero_stream")
 		return nil, connError{ErrCodeProtocol, "PRIORITY frame with stream ID 0"}
 	}
 	if len(payload) != 5 {
+		countError("frame_priority_bad_length")
 		return nil, connError{ErrCodeFrameSize, fmt.Sprintf("PRIORITY frame payload size was %d; want 5", len(payload))}
 	}
 	v := binary.BigEndian.Uint32(payload[:4])
@@ -1172,11 +1199,13 @@ type RSTStreamFrame struct {
 	ErrCode ErrCode
 }
 
-func parseRSTStreamFrame(_ *frameCache, fh FrameHeader, p []byte) (Frame, error) {
+func parseRSTStreamFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) {
 	if len(p) != 4 {
+		countError("frame_rststream_bad_len")
 		return nil, ConnectionError(ErrCodeFrameSize)
 	}
 	if fh.StreamID == 0 {
+		countError("frame_rststream_zero_stream")
 		return nil, ConnectionError(ErrCodeProtocol)
 	}
 	return &RSTStreamFrame{fh, ErrCode(binary.BigEndian.Uint32(p[:4]))}, nil
@@ -1202,8 +1231,9 @@ type ContinuationFrame struct {
 	headerFragBuf []byte
 }
 
-func parseContinuationFrame(_ *frameCache, fh FrameHeader, p []byte) (Frame, error) {
+func parseContinuationFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) {
 	if fh.StreamID == 0 {
+		countError("frame_continuation_zero_stream")
 		return nil, connError{ErrCodeProtocol, "CONTINUATION frame with stream ID 0"}
 	}
 	return &ContinuationFrame{fh, p}, nil
@@ -1252,7 +1282,7 @@ func (f *PushPromiseFrame) HeadersEnded() bool {
 	return f.FrameHeader.Flags.Has(FlagPushPromiseEndHeaders)
 }
 
-func parsePushPromise(_ *frameCache, fh FrameHeader, p []byte) (_ Frame, err error) {
+func parsePushPromise(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (_ Frame, err error) {
 	pp := &PushPromiseFrame{
 		FrameHeader: fh,
 	}
@@ -1263,6 +1293,7 @@ func parsePushPromise(_ *frameCache, fh FrameHeader, p []byte) (_ Frame, err err
 		// with. If the stream identifier field specifies the value
 		// 0x0, a recipient MUST respond with a connection error
 		// (Section 5.4.1) of type PROTOCOL_ERROR.
+		countError("frame_pushpromise_zero_stream")
 		return nil, ConnectionError(ErrCodeProtocol)
 	}
 	// The PUSH_PROMISE frame includes optional padding.
@@ -1270,18 +1301,21 @@ func parsePushPromise(_ *frameCache, fh FrameHeader, p []byte) (_ Frame, err err
 	var padLength uint8
 	if fh.Flags.Has(FlagPushPromisePadded) {
 		if p, padLength, err = readByte(p); err != nil {
+			countError("frame_pushpromise_pad_short")
 			return
 		}
 	}
 
 	p, pp.PromiseID, err = readUint32(p)
 	if err != nil {
+		countError("frame_pushpromise_promiseid_short")
 		return
 	}
 	pp.PromiseID = pp.PromiseID & (1<<31 - 1)
 
 	if int(padLength) > len(p) {
 		// like the DATA frame, error out if padding is longer than the body.
+		countError("frame_pushpromise_pad_too_big")
 		return nil, ConnectionError(ErrCodeProtocol)
 	}
 	pp.headerFragBuf = p[:len(p)-int(padLength)]

vendor/golang.org/x/net/http2/go115.go

@@ -0,0 +1,27 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.15
+// +build go1.15
+
+package http2
+
+import (
+	"context"
+	"crypto/tls"
+)
+
+// dialTLSWithContext uses tls.Dialer, added in Go 1.15, to open a TLS
+// connection.
+func (t *Transport) dialTLSWithContext(ctx context.Context, network, addr string, cfg *tls.Config) (*tls.Conn, error) {
+	dialer := &tls.Dialer{
+		Config: cfg,
+	}
+	cn, err := dialer.DialContext(ctx, network, addr)
+	if err != nil {
+		return nil, err
+	}
+	tlsCn := cn.(*tls.Conn) // DialContext comment promises this will always succeed
+	return tlsCn, nil
+}

vendor/golang.org/x/net/http2/headermap.go

@@ -6,7 +6,6 @@ package http2
 
 import (
 	"net/http"
-	"strings"
 	"sync"
 )
 
@@ -79,10 +78,10 @@ func buildCommonHeaderMaps() {
 	}
 }
 
-func lowerHeader(v string) string {
+func lowerHeader(v string) (lower string, ascii bool) {
 	buildCommonHeaderMapsOnce()
 	if s, ok := commonLowerHeader[v]; ok {
-		return s
+		return s, true
 	}
-	return strings.ToLower(v)
+	return asciiToLower(v)
 }

vendor/golang.org/x/net/http2/hpack/huffman.go

@@ -140,25 +140,29 @@ func buildRootHuffmanNode() {
 		panic("unexpected size")
 	}
 	lazyRootHuffmanNode = newInternalNode()
-	for i, code := range huffmanCodes {
+	// allocate a leaf node for each of the 256 symbols
-		addDecoderNode(byte(i), code, huffmanCodeLen[i])
+	leaves := new([256]node)
-	}
-}
 
-func addDecoderNode(sym byte, code uint32, codeLen uint8) {
+	for sym, code := range huffmanCodes {
-	cur := lazyRootHuffmanNode
+		codeLen := huffmanCodeLen[sym]
-	for codeLen > 8 {
+
-		codeLen -= 8
+		cur := lazyRootHuffmanNode
-		i := uint8(code >> codeLen)
+		for codeLen > 8 {
-		if cur.children[i] == nil {
+			codeLen -= 8
-			cur.children[i] = newInternalNode()
+			i := uint8(code >> codeLen)
+			if cur.children[i] == nil {
+				cur.children[i] = newInternalNode()
+			}
+			cur = cur.children[i]
+		}
+		shift := 8 - codeLen
+		start, end := int(uint8(code<<shift)), int(1<<shift)
+
+		leaves[sym].sym = byte(sym)
+		leaves[sym].codeLen = codeLen
+		for i := start; i < start+end; i++ {
+			cur.children[i] = &leaves[sym]
 		}
-		cur = cur.children[i]
-	}
-	shift := 8 - codeLen
-	start, end := int(uint8(code<<shift)), int(1<<shift)
-	for i := start; i < start+end; i++ {
-		cur.children[i] = &node{sym: sym, codeLen: codeLen}
 	}
 }
 

vendor/golang.org/x/net/http2/not_go115.go

@@ -0,0 +1,31 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !go1.15
+// +build !go1.15
+
+package http2
+
+import (
+	"context"
+	"crypto/tls"
+)
+
+// dialTLSWithContext opens a TLS connection.
+func (t *Transport) dialTLSWithContext(ctx context.Context, network, addr string, cfg *tls.Config) (*tls.Conn, error) {
+	cn, err := tls.Dial(network, addr, cfg)
+	if err != nil {
+		return nil, err
+	}
+	if err := cn.Handshake(); err != nil {
+		return nil, err
+	}
+	if cfg.InsecureSkipVerify {
+		return cn, nil
+	}
+	if err := cn.VerifyHostname(cfg.ServerName); err != nil {
+		return nil, err
+	}
+	return cn, nil
+}

vendor/golang.org/x/net/http2/pipe.go

@@ -30,6 +30,17 @@ type pipeBuffer interface {
 	io.Reader
 }
 
+// setBuffer initializes the pipe buffer.
+// It has no effect if the pipe is already closed.
+func (p *pipe) setBuffer(b pipeBuffer) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if p.err != nil || p.breakErr != nil {
+		return
+	}
+	p.b = b
+}
+
 func (p *pipe) Len() int {
 	p.mu.Lock()
 	defer p.mu.Unlock()

vendor/golang.org/x/net/http2/server.go

@@ -130,6 +130,12 @@ type Server struct {
 	// If nil, a default scheduler is chosen.
 	NewWriteScheduler func() WriteScheduler
 
+	// CountError, if non-nil, is called on HTTP/2 server errors.
+	// It's intended to increment a metric for monitoring, such
+	// as an expvar or Prometheus metric.
+	// The errType consists of only ASCII word characters.
+	CountError func(errType string)
+
 	// Internal state. This is a pointer (rather than embedded directly)
 	// so that we don't embed a Mutex in this struct, which will make the
 	// struct non-copyable, which might break some callers.
@@ -231,13 +237,12 @@ func ConfigureServer(s *http.Server, conf *Server) error {
 
 	if s.TLSConfig == nil {
 		s.TLSConfig = new(tls.Config)
-	} else if s.TLSConfig.CipherSuites != nil {
+	} else if s.TLSConfig.CipherSuites != nil && s.TLSConfig.MinVersion < tls.VersionTLS13 {
-		// If they already provided a CipherSuite list, return
+		// If they already provided a TLS 1.0–1.2 CipherSuite list, return an
-		// an error if it has a bad order or is missing
+		// error if it is missing ECDHE_RSA_WITH_AES_128_GCM_SHA256 or
-		// ECDHE_RSA_WITH_AES_128_GCM_SHA256 or ECDHE_ECDSA_WITH_AES_128_GCM_SHA256.
+		// ECDHE_ECDSA_WITH_AES_128_GCM_SHA256.
 		haveRequired := false
-		sawBad := false
+		for _, cs := range s.TLSConfig.CipherSuites {
-		for i, cs := range s.TLSConfig.CipherSuites {
 			switch cs {
 			case tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
 				// Alternative MTI cipher to not discourage ECDSA-only servers.
@@ -245,14 +250,9 @@ func ConfigureServer(s *http.Server, conf *Server) error {
 				tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256:
 				haveRequired = true
 			}
-			if isBadCipher(cs) {
-				sawBad = true
-			} else if sawBad {
-				return fmt.Errorf("http2: TLSConfig.CipherSuites index %d contains an HTTP/2-approved cipher suite (%#04x), but it comes after unapproved cipher suites. With this configuration, clients that don't support previous, approved cipher suites may be given an unapproved one and reject the connection.", i, cs)
-			}
 		}
 		if !haveRequired {
-			return fmt.Errorf("http2: TLSConfig.CipherSuites is missing an HTTP/2-required AES_128_GCM_SHA256 cipher (need at least one of TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 or TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256).")
+			return fmt.Errorf("http2: TLSConfig.CipherSuites is missing an HTTP/2-required AES_128_GCM_SHA256 cipher (need at least one of TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 or TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)")
 		}
 	}
 
@@ -265,16 +265,12 @@ func ConfigureServer(s *http.Server, conf *Server) error {
 
 	s.TLSConfig.PreferServerCipherSuites = true
 
-	haveNPN := false
+	if !strSliceContains(s.TLSConfig.NextProtos, NextProtoTLS) {
-	for _, p := range s.TLSConfig.NextProtos {
-		if p == NextProtoTLS {
-			haveNPN = true
-			break
-		}
-	}
-	if !haveNPN {
 		s.TLSConfig.NextProtos = append(s.TLSConfig.NextProtos, NextProtoTLS)
 	}
+	if !strSliceContains(s.TLSConfig.NextProtos, "http/1.1") {
+		s.TLSConfig.NextProtos = append(s.TLSConfig.NextProtos, "http/1.1")
+	}
 
 	if s.TLSNextProto == nil {
 		s.TLSNextProto = map[string]func(*http.Server, *tls.Conn, http.Handler){}
@@ -415,6 +411,9 @@ func (s *Server) ServeConn(c net.Conn, opts *ServeConnOpts) {
 	sc.hpackEncoder = hpack.NewEncoder(&sc.headerWriteBuf)
 
 	fr := NewFramer(sc.bw, c)
+	if s.CountError != nil {
+		fr.countError = s.CountError
+	}
 	fr.ReadMetaHeaders = hpack.NewDecoder(initialHeaderTableSize, nil)
 	fr.MaxHeaderListSize = sc.maxHeaderListSize()
 	fr.SetMaxReadFrameSize(s.maxReadFrameSize())
@@ -720,7 +719,15 @@ func (sc *serverConn) canonicalHeader(v string) string {
 		sc.canonHeader = make(map[string]string)
 	}
 	cv = http.CanonicalHeaderKey(v)
-	sc.canonHeader[v] = cv
+	// maxCachedCanonicalHeaders is an arbitrarily-chosen limit on the number of
+	// entries in the canonHeader cache. This should be larger than the number
+	// of unique, uncommon header keys likely to be sent by the peer, while not
+	// so high as to permit unreasonable memory usage if the peer sends an unbounded
+	// number of unique header keys.
+	const maxCachedCanonicalHeaders = 32
+	if len(sc.canonHeader) < maxCachedCanonicalHeaders {
+		sc.canonHeader[v] = cv
+	}
 	return cv
 }
 
@@ -826,7 +833,7 @@ func (sc *serverConn) serve() {
 	})
 	sc.unackedSettings++
 
-	// Each connection starts with intialWindowSize inflow tokens.
+	// Each connection starts with initialWindowSize inflow tokens.
 	// If a higher value is configured, we add more tokens.
 	if diff := sc.srv.initialConnRecvWindowSize() - initialWindowSize; diff > 0 {
 		sc.sendWindowUpdate(nil, int(diff))
@@ -866,6 +873,15 @@ func (sc *serverConn) serve() {
 		case res := <-sc.wroteFrameCh:
 			sc.wroteFrame(res)
 		case res := <-sc.readFrameCh:
+			// Process any written frames before reading new frames from the client since a
+			// written frame could have triggered a new stream to be started.
+			if sc.writingFrameAsync {
+				select {
+				case wroteRes := <-sc.wroteFrameCh:
+					sc.wroteFrame(wroteRes)
+				default:
+				}
+			}
 			if !sc.processFrameFromReader(res) {
 				return
 			}
@@ -1400,7 +1416,7 @@ func (sc *serverConn) processFrame(f Frame) error {
 	// First frame received must be SETTINGS.
 	if !sc.sawFirstSettings {
 		if _, ok := f.(*SettingsFrame); !ok {
-			return ConnectionError(ErrCodeProtocol)
+			return sc.countError("first_settings", ConnectionError(ErrCodeProtocol))
 		}
 		sc.sawFirstSettings = true
 	}
@@ -1425,7 +1441,7 @@ func (sc *serverConn) processFrame(f Frame) error {
 	case *PushPromiseFrame:
 		// A client cannot push. Thus, servers MUST treat the receipt of a PUSH_PROMISE
 		// frame as a connection error (Section 5.4.1) of type PROTOCOL_ERROR.
-		return ConnectionError(ErrCodeProtocol)
+		return sc.countError("push_promise", ConnectionError(ErrCodeProtocol))
 	default:
 		sc.vlogf("http2: server ignoring frame: %v", f.Header())
 		return nil
@@ -1445,7 +1461,7 @@ func (sc *serverConn) processPing(f *PingFrame) error {
 		// identifier field value other than 0x0, the recipient MUST
 		// respond with a connection error (Section 5.4.1) of type
 		// PROTOCOL_ERROR."
-		return ConnectionError(ErrCodeProtocol)
+		return sc.countError("ping_on_stream", ConnectionError(ErrCodeProtocol))
 	}
 	if sc.inGoAway && sc.goAwayCode != ErrCodeNo {
 		return nil
@@ -1464,7 +1480,7 @@ func (sc *serverConn) processWindowUpdate(f *WindowUpdateFrame) error {
 			// or PRIORITY on a stream in this state MUST be
 			// treated as a connection error (Section 5.4.1) of
 			// type PROTOCOL_ERROR."
-			return ConnectionError(ErrCodeProtocol)
+			return sc.countError("stream_idle", ConnectionError(ErrCodeProtocol))
 		}
 		if st == nil {
 			// "WINDOW_UPDATE can be sent by a peer that has sent a
@@ -1475,7 +1491,7 @@ func (sc *serverConn) processWindowUpdate(f *WindowUpdateFrame) error {
 			return nil
 		}
 		if !st.flow.add(int32(f.Increment)) {
-			return streamError(f.StreamID, ErrCodeFlowControl)
+			return sc.countError("bad_flow", streamError(f.StreamID, ErrCodeFlowControl))
 		}
 	default: // connection-level flow control
 		if !sc.flow.add(int32(f.Increment)) {
@@ -1496,7 +1512,7 @@ func (sc *serverConn) processResetStream(f *RSTStreamFrame) error {
 		// identifying an idle stream is received, the
 		// recipient MUST treat this as a connection error
 		// (Section 5.4.1) of type PROTOCOL_ERROR.
-		return ConnectionError(ErrCodeProtocol)
+		return sc.countError("reset_idle_stream", ConnectionError(ErrCodeProtocol))
 	}
 	if st != nil {
 		st.cancelCtx()
@@ -1548,7 +1564,7 @@ func (sc *serverConn) processSettings(f *SettingsFrame) error {
 			// Why is the peer ACKing settings we never sent?
 			// The spec doesn't mention this case, but
 			// hang up on them anyway.
-			return ConnectionError(ErrCodeProtocol)
+			return sc.countError("ack_mystery", ConnectionError(ErrCodeProtocol))
 		}
 		return nil
 	}
@@ -1556,7 +1572,7 @@ func (sc *serverConn) processSettings(f *SettingsFrame) error {
 		// This isn't actually in the spec, but hang up on
 		// suspiciously large settings frames or those with
 		// duplicate entries.
-		return ConnectionError(ErrCodeProtocol)
+		return sc.countError("settings_big_or_dups", ConnectionError(ErrCodeProtocol))
 	}
 	if err := f.ForeachSetting(sc.processSetting); err != nil {
 		return err
@@ -1623,7 +1639,7 @@ func (sc *serverConn) processSettingInitialWindowSize(val uint32) error {
 			// control window to exceed the maximum size as a
 			// connection error (Section 5.4.1) of type
 			// FLOW_CONTROL_ERROR."
-			return ConnectionError(ErrCodeFlowControl)
+			return sc.countError("setting_win_size", ConnectionError(ErrCodeFlowControl))
 		}
 	}
 	return nil
@@ -1656,7 +1672,7 @@ func (sc *serverConn) processData(f *DataFrame) error {
 		// or PRIORITY on a stream in this state MUST be
 		// treated as a connection error (Section 5.4.1) of
 		// type PROTOCOL_ERROR."
-		return ConnectionError(ErrCodeProtocol)
+		return sc.countError("data_on_idle", ConnectionError(ErrCodeProtocol))
 	}
 
 	// "If a DATA frame is received whose stream is not in "open"
@@ -1673,7 +1689,7 @@ func (sc *serverConn) processData(f *DataFrame) error {
 		// and return any flow control bytes since we're not going
 		// to consume them.
 		if sc.inflow.available() < int32(f.Length) {
-			return streamError(id, ErrCodeFlowControl)
+			return sc.countError("data_flow", streamError(id, ErrCodeFlowControl))
 		}
 		// Deduct the flow control from inflow, since we're
 		// going to immediately add it back in
@@ -1686,7 +1702,7 @@ func (sc *serverConn) processData(f *DataFrame) error {
 			// Already have a stream error in flight. Don't send another.
 			return nil
 		}
-		return streamError(id, ErrCodeStreamClosed)
+		return sc.countError("closed", streamError(id, ErrCodeStreamClosed))
 	}
 	if st.body == nil {
 		panic("internal error: should have a body in this state")
@@ -1698,12 +1714,12 @@ func (sc *serverConn) processData(f *DataFrame) error {
 		// RFC 7540, sec 8.1.2.6: A request or response is also malformed if the
 		// value of a content-length header field does not equal the sum of the
 		// DATA frame payload lengths that form the body.
-		return streamError(id, ErrCodeProtocol)
+		return sc.countError("send_too_much", streamError(id, ErrCodeProtocol))
 	}
 	if f.Length > 0 {
 		// Check whether the client has flow control quota.
 		if st.inflow.available() < int32(f.Length) {
-			return streamError(id, ErrCodeFlowControl)
+			return sc.countError("flow_on_data_length", streamError(id, ErrCodeFlowControl))
 		}
 		st.inflow.take(int32(f.Length))
 
@@ -1711,7 +1727,7 @@ func (sc *serverConn) processData(f *DataFrame) error {
 			wrote, err := st.body.Write(data)
 			if err != nil {
 				sc.sendWindowUpdate(nil, int(f.Length)-wrote)
-				return streamError(id, ErrCodeStreamClosed)
+				return sc.countError("body_write_err", streamError(id, ErrCodeStreamClosed))
 			}
 			if wrote != len(data) {
 				panic("internal error: bad Writer")
@@ -1797,7 +1813,7 @@ func (sc *serverConn) processHeaders(f *MetaHeadersFrame) error {
 	// stream identifier MUST respond with a connection error
 	// (Section 5.4.1) of type PROTOCOL_ERROR.
 	if id%2 != 1 {
-		return ConnectionError(ErrCodeProtocol)
+		return sc.countError("headers_even", ConnectionError(ErrCodeProtocol))
 	}
 	// A HEADERS frame can be used to create a new stream or
 	// send a trailer for an open one. If we already have a stream
@@ -1814,7 +1830,7 @@ func (sc *serverConn) processHeaders(f *MetaHeadersFrame) error {
 		// this state, it MUST respond with a stream error (Section 5.4.2) of
 		// type STREAM_CLOSED.
 		if st.state == stateHalfClosedRemote {
-			return streamError(id, ErrCodeStreamClosed)
+			return sc.countError("headers_half_closed", streamError(id, ErrCodeStreamClosed))
 		}
 		return st.processTrailerHeaders(f)
 	}
@@ -1825,7 +1841,7 @@ func (sc *serverConn) processHeaders(f *MetaHeadersFrame) error {
 	// receives an unexpected stream identifier MUST respond with
 	// a connection error (Section 5.4.1) of type PROTOCOL_ERROR.
 	if id <= sc.maxClientStreamID {
-		return ConnectionError(ErrCodeProtocol)
+		return sc.countError("stream_went_down", ConnectionError(ErrCodeProtocol))
 	}
 	sc.maxClientStreamID = id
 
@@ -1842,14 +1858,14 @@ func (sc *serverConn) processHeaders(f *MetaHeadersFrame) error {
 	if sc.curClientStreams+1 > sc.advMaxStreams {
 		if sc.unackedSettings == 0 {
 			// They should know better.
-			return streamError(id, ErrCodeProtocol)
+			return sc.countError("over_max_streams", streamError(id, ErrCodeProtocol))
 		}
 		// Assume it's a network race, where they just haven't
 		// received our last SETTINGS update. But actually
 		// this can't happen yet, because we don't yet provide
 		// a way for users to adjust server parameters at
 		// runtime.
-		return streamError(id, ErrCodeRefusedStream)
+		return sc.countError("over_max_streams_race", streamError(id, ErrCodeRefusedStream))
 	}
 
 	initialState := stateOpen
@@ -1859,7 +1875,7 @@ func (sc *serverConn) processHeaders(f *MetaHeadersFrame) error {
 	st := sc.newStream(id, 0, initialState)
 
 	if f.HasPriority() {
-		if err := checkPriority(f.StreamID, f.Priority); err != nil {
+		if err := sc.checkPriority(f.StreamID, f.Priority); err != nil {
 			return err
 		}
 		sc.writeSched.AdjustStream(st.id, f.Priority)
@@ -1903,15 +1919,15 @@ func (st *stream) processTrailerHeaders(f *MetaHeadersFrame) error {
 	sc := st.sc
 	sc.serveG.check()
 	if st.gotTrailerHeader {
-		return ConnectionError(ErrCodeProtocol)
+		return sc.countError("dup_trailers", ConnectionError(ErrCodeProtocol))
 	}
 	st.gotTrailerHeader = true
 	if !f.StreamEnded() {
-		return streamError(st.id, ErrCodeProtocol)
+		return sc.countError("trailers_not_ended", streamError(st.id, ErrCodeProtocol))
 	}
 
 	if len(f.PseudoFields()) > 0 {
-		return streamError(st.id, ErrCodeProtocol)
+		return sc.countError("trailers_pseudo", streamError(st.id, ErrCodeProtocol))
 	}
 	if st.trailer != nil {
 		for _, hf := range f.RegularFields() {
@@ -1920,7 +1936,7 @@ func (st *stream) processTrailerHeaders(f *MetaHeadersFrame) error {
 				// TODO: send more details to the peer somehow. But http2 has
 				// no way to send debug data at a stream level. Discuss with
 				// HTTP folk.
-				return streamError(st.id, ErrCodeProtocol)
+				return sc.countError("trailers_bogus", streamError(st.id, ErrCodeProtocol))
 			}
 			st.trailer[key] = append(st.trailer[key], hf.Value)
 		}
@@ -1929,13 +1945,13 @@ func (st *stream) processTrailerHeaders(f *MetaHeadersFrame) error {
 	return nil
 }
 
-func checkPriority(streamID uint32, p PriorityParam) error {
+func (sc *serverConn) checkPriority(streamID uint32, p PriorityParam) error {
 	if streamID == p.StreamDep {
 		// Section 5.3.1: "A stream cannot depend on itself. An endpoint MUST treat
 		// this as a stream error (Section 5.4.2) of type PROTOCOL_ERROR."
 		// Section 5.3.3 says that a stream can depend on one of its dependencies,
 		// so it's only self-dependencies that are forbidden.
-		return streamError(streamID, ErrCodeProtocol)
+		return sc.countError("priority", streamError(streamID, ErrCodeProtocol))
 	}
 	return nil
 }
@@ -1944,7 +1960,7 @@ func (sc *serverConn) processPriority(f *PriorityFrame) error {
 	if sc.inGoAway {
 		return nil
 	}
-	if err := checkPriority(f.StreamID, f.PriorityParam); err != nil {
+	if err := sc.checkPriority(f.StreamID, f.PriorityParam); err != nil {
 		return err
 	}
 	sc.writeSched.AdjustStream(f.StreamID, f.PriorityParam)
@@ -2001,7 +2017,7 @@ func (sc *serverConn) newWriterAndRequest(st *stream, f *MetaHeadersFrame) (*res
 	isConnect := rp.method == "CONNECT"
 	if isConnect {
 		if rp.path != "" || rp.scheme != "" || rp.authority == "" {
-			return nil, nil, streamError(f.StreamID, ErrCodeProtocol)
+			return nil, nil, sc.countError("bad_connect", streamError(f.StreamID, ErrCodeProtocol))
 		}
 	} else if rp.method == "" || rp.path == "" || (rp.scheme != "https" && rp.scheme != "http") {
 		// See 8.1.2.6 Malformed Requests and Responses:
@@ -2014,13 +2030,13 @@ func (sc *serverConn) newWriterAndRequest(st *stream, f *MetaHeadersFrame) (*res
 		// "All HTTP/2 requests MUST include exactly one valid
 		// value for the :method, :scheme, and :path
 		// pseudo-header fields"
-		return nil, nil, streamError(f.StreamID, ErrCodeProtocol)
+		return nil, nil, sc.countError("bad_path_method", streamError(f.StreamID, ErrCodeProtocol))
 	}
 
 	bodyOpen := !f.StreamEnded()
 	if rp.method == "HEAD" && bodyOpen {
 		// HEAD requests can't have bodies
-		return nil, nil, streamError(f.StreamID, ErrCodeProtocol)
+		return nil, nil, sc.countError("head_body", streamError(f.StreamID, ErrCodeProtocol))
 	}
 
 	rp.header = make(http.Header)
@@ -2103,7 +2119,7 @@ func (sc *serverConn) newWriterAndRequestNoBody(st *stream, rp requestParam) (*r
 		var err error
 		url_, err = url.ParseRequestURI(rp.path)
 		if err != nil {
-			return nil, nil, streamError(st.id, ErrCodeProtocol)
+			return nil, nil, sc.countError("bad_path", streamError(st.id, ErrCodeProtocol))
 		}
 		requestURI = rp.path
 	}
@@ -2789,8 +2805,12 @@ func (w *responseWriter) Push(target string, opts *http.PushOptions) error {
 		// but PUSH_PROMISE requests cannot have a body.
 		// http://tools.ietf.org/html/rfc7540#section-8.2
 		// Also disallow Host, since the promised URL must be absolute.
-		switch strings.ToLower(k) {
+		if asciiEqualFold(k, "content-length") ||
-		case "content-length", "content-encoding", "trailer", "te", "expect", "host":
+			asciiEqualFold(k, "content-encoding") ||
+			asciiEqualFold(k, "trailer") ||
+			asciiEqualFold(k, "te") ||
+			asciiEqualFold(k, "expect") ||
+			asciiEqualFold(k, "host") {
 			return fmt.Errorf("promised request headers cannot include %q", k)
 		}
 	}
@@ -2982,3 +3002,31 @@ func h1ServerKeepAlivesDisabled(hs *http.Server) bool {
 	}
 	return false
 }
+
+func (sc *serverConn) countError(name string, err error) error {
+	if sc == nil || sc.srv == nil {
+		return err
+	}
+	f := sc.srv.CountError
+	if f == nil {
+		return err
+	}
+	var typ string
+	var code ErrCode
+	switch e := err.(type) {
+	case ConnectionError:
+		typ = "conn"
+		code = ErrCode(e)
+	case StreamError:
+		typ = "stream"
+		code = ErrCode(e.Code)
+	default:
+		return err
+	}
+	codeStr := errCodeName[code]
+	if codeStr == "" {
+		codeStr = strconv.Itoa(int(code))
+	}
+	f(fmt.Sprintf("%s_%s_%s", typ, codeStr, name))
+	return err
+}

vendor/golang.org/x/net/http2/write.go

@@ -341,7 +341,12 @@ func encodeHeaders(enc *hpack.Encoder, h http.Header, keys []string) {
 	}
 	for _, k := range keys {
 		vv := h[k]
-		k = lowerHeader(k)
+		k, ascii := lowerHeader(k)
+		if !ascii {
+			// Skip writing invalid headers. Per RFC 7540, Section 8.1.2, header
+			// field names have to be ASCII characters (just as in HTTP/1.x).
+			continue
+		}
 		if !validWireHeaderFieldName(k) {
 			// Skip it as backup paranoia. Per
 			// golang.org/issue/14048, these should

vendor/golang.org/x/net/http2/writesched.go

@@ -32,7 +32,8 @@ type WriteScheduler interface {
 
 	// Pop dequeues the next frame to write. Returns false if no frames can
 	// be written. Frames with a given wr.StreamID() are Pop'd in the same
-	// order they are Push'd. No frames should be discarded except by CloseStream.
+	// order they are Push'd, except RST_STREAM frames. No frames should be
+	// discarded except by CloseStream.
 	Pop() (wr FrameWriteRequest, ok bool)
 }
 
@@ -52,6 +53,7 @@ type FrameWriteRequest struct {
 
 	// stream is the stream on which this frame will be written.
 	// nil for non-stream frames like PING and SETTINGS.
+	// nil for RST_STREAM streams, which use the StreamError.StreamID field instead.
 	stream *stream
 
 	// done, if non-nil, must be a buffered channel with space for

vendor/golang.org/x/net/http2/writesched_random.go

@@ -45,11 +45,11 @@ func (ws *randomWriteScheduler) AdjustStream(streamID uint32, priority PriorityP
 }
 
 func (ws *randomWriteScheduler) Push(wr FrameWriteRequest) {
-	id := wr.StreamID()
+	if wr.isControl() {
-	if id == 0 {
 		ws.zero.push(wr)
 		return
 	}
+	id := wr.StreamID()
 	q, ok := ws.sq[id]
 	if !ok {
 		q = ws.queuePool.get()
@@ -59,7 +59,7 @@ func (ws *randomWriteScheduler) Push(wr FrameWriteRequest) {
 }
 
 func (ws *randomWriteScheduler) Pop() (FrameWriteRequest, bool) {
-	// Control frames first.
+	// Control and RST_STREAM frames first.
 	if !ws.zero.empty() {
 		return ws.zero.shift(), true
 	}

vendor/golang.org/x/net/idna/go118.go

@@ -0,0 +1,14 @@
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.18
+// +build go1.18
+
+package idna
+
+// Transitional processing is disabled by default in Go 1.18.
+// https://golang.org/issue/47510
+const transitionalLookup = false

vendor/golang.org/x/net/idna/idna10.0.0.go

@@ -59,23 +59,22 @@ type Option func(*options)
 // Transitional sets a Profile to use the Transitional mapping as defined in UTS
 // #46. This will cause, for example, "ß" to be mapped to "ss". Using the
 // transitional mapping provides a compromise between IDNA2003 and IDNA2008
-// compatibility. It is used by most browsers when resolving domain names. This
+// compatibility. It is used by some browsers when resolving domain names. This
 // option is only meaningful if combined with MapForLookup.
 func Transitional(transitional bool) Option {
-	return func(o *options) { o.transitional = true }
+	return func(o *options) { o.transitional = transitional }
 }
 
 // VerifyDNSLength sets whether a Profile should fail if any of the IDN parts
 // are longer than allowed by the RFC.
+//
+// This option corresponds to the VerifyDnsLength flag in UTS #46.
 func VerifyDNSLength(verify bool) Option {
 	return func(o *options) { o.verifyDNSLength = verify }
 }
 
 // RemoveLeadingDots removes leading label separators. Leading runes that map to
 // dots, such as U+3002 IDEOGRAPHIC FULL STOP, are removed as well.
-//
-// This is the behavior suggested by the UTS #46 and is adopted by some
-// browsers.
 func RemoveLeadingDots(remove bool) Option {
 	return func(o *options) { o.removeLeadingDots = remove }
 }
@@ -83,6 +82,8 @@ func RemoveLeadingDots(remove bool) Option {
 // ValidateLabels sets whether to check the mandatory label validation criteria
 // as defined in Section 5.4 of RFC 5891. This includes testing for correct use
 // of hyphens ('-'), normalization, validity of runes, and the context rules.
+// In particular, ValidateLabels also sets the CheckHyphens and CheckJoiners flags
+// in UTS #46.
 func ValidateLabels(enable bool) Option {
 	return func(o *options) {
 		// Don't override existing mappings, but set one that at least checks
@@ -91,25 +92,48 @@ func ValidateLabels(enable bool) Option {
 			o.mapping = normalize
 		}
 		o.trie = trie
-		o.validateLabels = enable
+		o.checkJoiners = enable
-		o.fromPuny = validateFromPunycode
+		o.checkHyphens = enable
+		if enable {
+			o.fromPuny = validateFromPunycode
+		} else {
+			o.fromPuny = nil
+		}
+	}
+}
+
+// CheckHyphens sets whether to check for correct use of hyphens ('-') in
+// labels. Most web browsers do not have this option set, since labels such as
+// "r3---sn-apo3qvuoxuxbt-j5pe" are in common use.
+//
+// This option corresponds to the CheckHyphens flag in UTS #46.
+func CheckHyphens(enable bool) Option {
+	return func(o *options) { o.checkHyphens = enable }
+}
+
+// CheckJoiners sets whether to check the ContextJ rules as defined in Appendix
+// A of RFC 5892, concerning the use of joiner runes.
+//
+// This option corresponds to the CheckJoiners flag in UTS #46.
+func CheckJoiners(enable bool) Option {
+	return func(o *options) {
+		o.trie = trie
+		o.checkJoiners = enable
 	}
 }
 
 // StrictDomainName limits the set of permissible ASCII characters to those
 // allowed in domain names as defined in RFC 1034 (A-Z, a-z, 0-9 and the
-// hyphen). This is set by default for MapForLookup and ValidateForRegistration.
+// hyphen). This is set by default for MapForLookup and ValidateForRegistration,
+// but is only useful if ValidateLabels is set.
 //
 // This option is useful, for instance, for browsers that allow characters
 // outside this range, for example a '_' (U+005F LOW LINE). See
-// http://www.rfc-editor.org/std/std3.txt for more details This option
+// http://www.rfc-editor.org/std/std3.txt for more details.
-// corresponds to the UseSTD3ASCIIRules option in UTS #46.
+//
+// This option corresponds to the UseSTD3ASCIIRules flag in UTS #46.
 func StrictDomainName(use bool) Option {
-	return func(o *options) {
+	return func(o *options) { o.useSTD3Rules = use }
-		o.trie = trie
-		o.useSTD3Rules = use
-		o.fromPuny = validateFromPunycode
-	}
 }
 
 // NOTE: the following options pull in tables. The tables should not be linked
@@ -117,6 +141,8 @@ func StrictDomainName(use bool) Option {
 
 // BidiRule enables the Bidi rule as defined in RFC 5893. Any application
 // that relies on proper validation of labels should include this rule.
+//
+// This option corresponds to the CheckBidi flag in UTS #46.
 func BidiRule() Option {
 	return func(o *options) { o.bidirule = bidirule.ValidString }
 }
@@ -152,7 +178,8 @@ func MapForLookup() Option {
 type options struct {
 	transitional      bool
 	useSTD3Rules      bool
-	validateLabels    bool
+	checkHyphens      bool
+	checkJoiners      bool
 	verifyDNSLength   bool
 	removeLeadingDots bool
 
@@ -225,8 +252,11 @@ func (p *Profile) String() string {
 	if p.useSTD3Rules {
 		s += ":UseSTD3Rules"
 	}
-	if p.validateLabels {
+	if p.checkHyphens {
-		s += ":ValidateLabels"
+		s += ":CheckHyphens"
+	}
+	if p.checkJoiners {
+		s += ":CheckJoiners"
 	}
 	if p.verifyDNSLength {
 		s += ":VerifyDNSLength"
@@ -254,26 +284,29 @@ var (
 
 	punycode = &Profile{}
 	lookup   = &Profile{options{
-		transitional:   true,
+		transitional: transitionalLookup,
-		useSTD3Rules:   true,
+		useSTD3Rules: true,
-		validateLabels: true,
+		checkHyphens: true,
-		trie:           trie,
+		checkJoiners: true,
-		fromPuny:       validateFromPunycode,
+		trie:         trie,
-		mapping:        validateAndMap,
+		fromPuny:     validateFromPunycode,
-		bidirule:       bidirule.ValidString,
+		mapping:      validateAndMap,
+		bidirule:     bidirule.ValidString,
 	}}
 	display = &Profile{options{
-		useSTD3Rules:   true,
+		useSTD3Rules: true,
-		validateLabels: true,
+		checkHyphens: true,
-		trie:           trie,
+		checkJoiners: true,
-		fromPuny:       validateFromPunycode,
+		trie:         trie,
-		mapping:        validateAndMap,
+		fromPuny:     validateFromPunycode,
-		bidirule:       bidirule.ValidString,
+		mapping:      validateAndMap,
+		bidirule:     bidirule.ValidString,
 	}}
 	registration = &Profile{options{
 		useSTD3Rules:    true,
-		validateLabels:  true,
 		verifyDNSLength: true,
+		checkHyphens:    true,
+		checkJoiners:    true,
 		trie:            trie,
 		fromPuny:        validateFromPunycode,
 		mapping:         validateRegistration,
@@ -340,7 +373,7 @@ func (p *Profile) process(s string, toASCII bool) (string, error) {
 			}
 			isBidi = isBidi || bidirule.DirectionString(u) != bidi.LeftToRight
 			labels.set(u)
-			if err == nil && p.validateLabels {
+			if err == nil && p.fromPuny != nil {
 				err = p.fromPuny(p, u)
 			}
 			if err == nil {
@@ -681,16 +714,18 @@ func (p *Profile) validateLabel(s string) (err error) {
 		}
 		return nil
 	}
-	if !p.validateLabels {
+	if p.checkHyphens {
+		if len(s) > 4 && s[2] == '-' && s[3] == '-' {
+			return &labelError{s, "V2"}
+		}
+		if s[0] == '-' || s[len(s)-1] == '-' {
+			return &labelError{s, "V3"}
+		}
+	}
+	if !p.checkJoiners {
 		return nil
 	}
-	trie := p.trie // p.validateLabels is only set if trie is set.
+	trie := p.trie // p.checkJoiners is only set if trie is set.
-	if len(s) > 4 && s[2] == '-' && s[3] == '-' {
-		return &labelError{s, "V2"}
-	}
-	if s[0] == '-' || s[len(s)-1] == '-' {
-		return &labelError{s, "V3"}
-	}
 	// TODO: merge the use of this in the trie.
 	v, sz := trie.lookupString(s)
 	x := info(v)

vendor/golang.org/x/net/idna/idna9.0.0.go

@@ -58,23 +58,22 @@ type Option func(*options)
 // Transitional sets a Profile to use the Transitional mapping as defined in UTS
 // #46. This will cause, for example, "ß" to be mapped to "ss". Using the
 // transitional mapping provides a compromise between IDNA2003 and IDNA2008
-// compatibility. It is used by most browsers when resolving domain names. This
+// compatibility. It is used by some browsers when resolving domain names. This
 // option is only meaningful if combined with MapForLookup.
 func Transitional(transitional bool) Option {
-	return func(o *options) { o.transitional = true }
+	return func(o *options) { o.transitional = transitional }
 }
 
 // VerifyDNSLength sets whether a Profile should fail if any of the IDN parts
 // are longer than allowed by the RFC.
+//
+// This option corresponds to the VerifyDnsLength flag in UTS #46.
 func VerifyDNSLength(verify bool) Option {
 	return func(o *options) { o.verifyDNSLength = verify }
 }
 
 // RemoveLeadingDots removes leading label separators. Leading runes that map to
 // dots, such as U+3002 IDEOGRAPHIC FULL STOP, are removed as well.
-//
-// This is the behavior suggested by the UTS #46 and is adopted by some
-// browsers.
 func RemoveLeadingDots(remove bool) Option {
 	return func(o *options) { o.removeLeadingDots = remove }
 }
@@ -82,6 +81,8 @@ func RemoveLeadingDots(remove bool) Option {
 // ValidateLabels sets whether to check the mandatory label validation criteria
 // as defined in Section 5.4 of RFC 5891. This includes testing for correct use
 // of hyphens ('-'), normalization, validity of runes, and the context rules.
+// In particular, ValidateLabels also sets the CheckHyphens and CheckJoiners flags
+// in UTS #46.
 func ValidateLabels(enable bool) Option {
 	return func(o *options) {
 		// Don't override existing mappings, but set one that at least checks
@@ -90,25 +91,48 @@ func ValidateLabels(enable bool) Option {
 			o.mapping = normalize
 		}
 		o.trie = trie
-		o.validateLabels = enable
+		o.checkJoiners = enable
-		o.fromPuny = validateFromPunycode
+		o.checkHyphens = enable
+		if enable {
+			o.fromPuny = validateFromPunycode
+		} else {
+			o.fromPuny = nil
+		}
+	}
+}
+
+// CheckHyphens sets whether to check for correct use of hyphens ('-') in
+// labels. Most web browsers do not have this option set, since labels such as
+// "r3---sn-apo3qvuoxuxbt-j5pe" are in common use.
+//
+// This option corresponds to the CheckHyphens flag in UTS #46.
+func CheckHyphens(enable bool) Option {
+	return func(o *options) { o.checkHyphens = enable }
+}
+
+// CheckJoiners sets whether to check the ContextJ rules as defined in Appendix
+// A of RFC 5892, concerning the use of joiner runes.
+//
+// This option corresponds to the CheckJoiners flag in UTS #46.
+func CheckJoiners(enable bool) Option {
+	return func(o *options) {
+		o.trie = trie
+		o.checkJoiners = enable
 	}
 }
 
 // StrictDomainName limits the set of permissable ASCII characters to those
 // allowed in domain names as defined in RFC 1034 (A-Z, a-z, 0-9 and the
-// hyphen). This is set by default for MapForLookup and ValidateForRegistration.
+// hyphen). This is set by default for MapForLookup and ValidateForRegistration,
+// but is only useful if ValidateLabels is set.
 //
 // This option is useful, for instance, for browsers that allow characters
 // outside this range, for example a '_' (U+005F LOW LINE). See
-// http://www.rfc-editor.org/std/std3.txt for more details This option
+// http://www.rfc-editor.org/std/std3.txt for more details.
-// corresponds to the UseSTD3ASCIIRules option in UTS #46.
+//
+// This option corresponds to the UseSTD3ASCIIRules flag in UTS #46.
 func StrictDomainName(use bool) Option {
-	return func(o *options) {
+	return func(o *options) { o.useSTD3Rules = use }
-		o.trie = trie
-		o.useSTD3Rules = use
-		o.fromPuny = validateFromPunycode
-	}
 }
 
 // NOTE: the following options pull in tables. The tables should not be linked
@@ -116,6 +140,8 @@ func StrictDomainName(use bool) Option {
 
 // BidiRule enables the Bidi rule as defined in RFC 5893. Any application
 // that relies on proper validation of labels should include this rule.
+//
+// This option corresponds to the CheckBidi flag in UTS #46.
 func BidiRule() Option {
 	return func(o *options) { o.bidirule = bidirule.ValidString }
 }
@@ -152,7 +178,8 @@ func MapForLookup() Option {
 type options struct {
 	transitional      bool
 	useSTD3Rules      bool
-	validateLabels    bool
+	checkHyphens      bool
+	checkJoiners      bool
 	verifyDNSLength   bool
 	removeLeadingDots bool
 
@@ -225,8 +252,11 @@ func (p *Profile) String() string {
 	if p.useSTD3Rules {
 		s += ":UseSTD3Rules"
 	}
-	if p.validateLabels {
+	if p.checkHyphens {
-		s += ":ValidateLabels"
+		s += ":CheckHyphens"
+	}
+	if p.checkJoiners {
+		s += ":CheckJoiners"
 	}
 	if p.verifyDNSLength {
 		s += ":VerifyDNSLength"
@@ -255,9 +285,10 @@ var (
 	punycode = &Profile{}
 	lookup   = &Profile{options{
 		transitional:      true,
-		useSTD3Rules:      true,
-		validateLabels:    true,
 		removeLeadingDots: true,
+		useSTD3Rules:      true,
+		checkHyphens:      true,
+		checkJoiners:      true,
 		trie:              trie,
 		fromPuny:          validateFromPunycode,
 		mapping:           validateAndMap,
@@ -265,8 +296,9 @@ var (
 	}}
 	display = &Profile{options{
 		useSTD3Rules:      true,
-		validateLabels:    true,
 		removeLeadingDots: true,
+		checkHyphens:      true,
+		checkJoiners:      true,
 		trie:              trie,
 		fromPuny:          validateFromPunycode,
 		mapping:           validateAndMap,
@@ -274,8 +306,9 @@ var (
 	}}
 	registration = &Profile{options{
 		useSTD3Rules:    true,
-		validateLabels:  true,
 		verifyDNSLength: true,
+		checkHyphens:    true,
+		checkJoiners:    true,
 		trie:            trie,
 		fromPuny:        validateFromPunycode,
 		mapping:         validateRegistration,
@@ -339,7 +372,7 @@ func (p *Profile) process(s string, toASCII bool) (string, error) {
 				continue
 			}
 			labels.set(u)
-			if err == nil && p.validateLabels {
+			if err == nil && p.fromPuny != nil {
 				err = p.fromPuny(p, u)
 			}
 			if err == nil {
@@ -629,16 +662,18 @@ func (p *Profile) validateLabel(s string) error {
 	if p.bidirule != nil && !p.bidirule(s) {
 		return &labelError{s, "B"}
 	}
-	if !p.validateLabels {
+	if p.checkHyphens {
+		if len(s) > 4 && s[2] == '-' && s[3] == '-' {
+			return &labelError{s, "V2"}
+		}
+		if s[0] == '-' || s[len(s)-1] == '-' {
+			return &labelError{s, "V3"}
+		}
+	}
+	if !p.checkJoiners {
 		return nil
 	}
-	trie := p.trie // p.validateLabels is only set if trie is set.
+	trie := p.trie // p.checkJoiners is only set if trie is set.
-	if len(s) > 4 && s[2] == '-' && s[3] == '-' {
-		return &labelError{s, "V2"}
-	}
-	if s[0] == '-' || s[len(s)-1] == '-' {
-		return &labelError{s, "V3"}
-	}
 	// TODO: merge the use of this in the trie.
 	v, sz := trie.lookupString(s)
 	x := info(v)

vendor/golang.org/x/net/idna/pre_go118.go

@@ -0,0 +1,12 @@
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !go1.18
+// +build !go1.18
+
+package idna
+
+const transitionalLookup = true

vendor/golang.org/x/net/idna/punycode.go

@@ -49,6 +49,7 @@ func decode(encoded string) (string, error) {
 		}
 	}
 	i, n, bias := int32(0), initialN, initialBias
+	overflow := false
 	for pos < len(encoded) {
 		oldI, w := i, int32(1)
 		for k := base; ; k += base {
@@ -60,29 +61,32 @@ func decode(encoded string) (string, error) {
 				return "", punyError(encoded)
 			}
 			pos++
-			i += digit * w
+			i, overflow = madd(i, digit, w)
-			if i < 0 {
+			if overflow {
 				return "", punyError(encoded)
 			}
 			t := k - bias
-			if t < tmin {
+			if k <= bias {
 				t = tmin
-			} else if t > tmax {
+			} else if k >= bias+tmax {
 				t = tmax
 			}
 			if digit < t {
 				break
 			}
-			w *= base - t
+			w, overflow = madd(0, w, base-t)
-			if w >= math.MaxInt32/base {
+			if overflow {
 				return "", punyError(encoded)
 			}
 		}
+		if len(output) >= 1024 {
+			return "", punyError(encoded)
+		}
 		x := int32(len(output) + 1)
 		bias = adapt(i-oldI, x, oldI == 0)
 		n += i / x
 		i %= x
-		if n > utf8.MaxRune || len(output) >= 1024 {
+		if n < 0 || n > utf8.MaxRune {
 			return "", punyError(encoded)
 		}
 		output = append(output, 0)
@@ -115,6 +119,7 @@ func encode(prefix, s string) (string, error) {
 	if b > 0 {
 		output = append(output, '-')
 	}
+	overflow := false
 	for remaining != 0 {
 		m := int32(0x7fffffff)
 		for _, r := range s {
@@ -122,8 +127,8 @@ func encode(prefix, s string) (string, error) {
 				m = r
 			}
 		}
-		delta += (m - n) * (h + 1)
+		delta, overflow = madd(delta, m-n, h+1)
-		if delta < 0 {
+		if overflow {
 			return "", punyError(s)
 		}
 		n = m
@@ -141,9 +146,9 @@ func encode(prefix, s string) (string, error) {
 			q := delta
 			for k := base; ; k += base {
 				t := k - bias
-				if t < tmin {
+				if k <= bias {
 					t = tmin
-				} else if t > tmax {
+				} else if k >= bias+tmax {
 					t = tmax
 				}
 				if q < t {
@@ -164,6 +169,15 @@ func encode(prefix, s string) (string, error) {
 	return string(output), nil
 }
 
+// madd computes a + (b * c), detecting overflow.
+func madd(a, b, c int32) (next int32, overflow bool) {
+	p := int64(b) * int64(c)
+	if p > math.MaxInt32-int64(a) {
+		return 0, true
+	}
+	return a + int32(p), false
+}
+
 func decodeDigit(x byte) (digit int32, ok bool) {
 	switch {
 	case '0' <= x && x <= '9':

vendor/golang.org/x/sys/unix/README.md

@@ -149,7 +149,7 @@ To add a constant, add the header that includes it to the appropriate variable.
 Then, edit the regex (if necessary) to match the desired constant. Avoid making
 the regex too broad to avoid matching unintended constants.
 
-### mkmerge.go
+### internal/mkmerge
 
 This program is used to extract duplicate const, func, and type declarations
 from the generated architecture-specific files listed below, and merge these

vendor/golang.org/x/sys/unix/mkall.sh

@@ -50,7 +50,7 @@ if [[ "$GOOS" = "linux" ]]; then
 	# Use the Docker-based build system
 	# Files generated through docker (use $cmd so you can Ctl-C the build or run)
 	$cmd docker build --tag generate:$GOOS $GOOS
-	$cmd docker run --interactive --tty --volume $(cd -- "$(dirname -- "$0")" && /bin/pwd):/build generate:$GOOS
+	$cmd docker run --interactive --tty --volume $(cd -- "$(dirname -- "$0")/.." && /bin/pwd):/build generate:$GOOS
 	exit
 fi
 

vendor/golang.org/x/sys/unix/mkerrors.sh

@@ -54,7 +54,7 @@ includes_AIX='
 
 includes_Darwin='
 #define _DARWIN_C_SOURCE
-#define KERNEL
+#define KERNEL 1
 #define _DARWIN_USE_64_BIT_INODE
 #define __APPLE_USE_RFC_3542
 #include <stdint.h>
@@ -75,6 +75,7 @@ includes_Darwin='
 #include <sys/utsname.h>
 #include <sys/wait.h>
 #include <sys/xattr.h>
+#include <sys/vsock.h>
 #include <net/bpf.h>
 #include <net/if.h>
 #include <net/if_types.h>
@@ -82,6 +83,9 @@ includes_Darwin='
 #include <netinet/in.h>
 #include <netinet/ip.h>
 #include <termios.h>
+
+// for backwards compatibility because moved TIOCREMOTE to Kernel.framework after MacOSX12.0.sdk.
+#define TIOCREMOTE 0x80047469
 '
 
 includes_DragonFly='
@@ -235,6 +239,7 @@ struct ltchars {
 #include <linux/magic.h>
 #include <linux/memfd.h>
 #include <linux/module.h>
+#include <linux/mount.h>
 #include <linux/netfilter/nfnetlink.h>
 #include <linux/netlink.h>
 #include <linux/net_namespace.h>
@@ -256,6 +261,7 @@ struct ltchars {
 #include <linux/vm_sockets.h>
 #include <linux/wait.h>
 #include <linux/watchdog.h>
+#include <linux/wireguard.h>
 
 #include <mtd/ubi-user.h>
 #include <mtd/mtd-user.h>
@@ -466,7 +472,6 @@ ccflags="$@"
 		$2 !~ /^EQUIV_/ &&
 		$2 !~ /^EXPR_/ &&
 		$2 !~ /^EVIOC/ &&
-		$2 !~ /^EV_/ &&
 		$2 ~ /^E[A-Z0-9_]+$/ ||
 		$2 ~ /^B[0-9_]+$/ ||
 		$2 ~ /^(OLD|NEW)DEV$/ ||
@@ -517,7 +522,7 @@ ccflags="$@"
 		$2 ~ /^HW_MACHINE$/ ||
 		$2 ~ /^SYSCTL_VERS/ ||
 		$2 !~ "MNT_BITS" &&
-		$2 ~ /^(MS|MNT|UMOUNT)_/ ||
+		$2 ~ /^(MS|MNT|MOUNT|UMOUNT)_/ ||
 		$2 ~ /^NS_GET_/ ||
 		$2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ ||
 		$2 ~ /^(O|F|[ES]?FD|NAME|S|PTRACE|PT|TFD)_/ ||
@@ -602,6 +607,7 @@ ccflags="$@"
 		$2 ~ /^MTD/ ||
 		$2 ~ /^OTP/ ||
 		$2 ~ /^MEM/ ||
+		$2 ~ /^WG/ ||
 		$2 ~ /^BLK[A-Z]*(GET$|SET$|BUF$|PART$|SIZE)/ {printf("\t%s = C.%s\n", $2, $2)}
 		$2 ~ /^__WCOREFLAG$/ {next}
 		$2 ~ /^__W[A-Z0-9]+$/ {printf("\t%s = C.%s\n", substr($2,3), $2)}

vendor/golang.org/x/sys/unix/sockcmsg_linux.go

@@ -34,3 +34,52 @@ func ParseUnixCredentials(m *SocketControlMessage) (*Ucred, error) {
 	ucred := *(*Ucred)(unsafe.Pointer(&m.Data[0]))
 	return &ucred, nil
 }
+
+// PktInfo4 encodes Inet4Pktinfo into a socket control message of type IP_PKTINFO.
+func PktInfo4(info *Inet4Pktinfo) []byte {
+	b := make([]byte, CmsgSpace(SizeofInet4Pktinfo))
+	h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
+	h.Level = SOL_IP
+	h.Type = IP_PKTINFO
+	h.SetLen(CmsgLen(SizeofInet4Pktinfo))
+	*(*Inet4Pktinfo)(h.data(0)) = *info
+	return b
+}
+
+// PktInfo6 encodes Inet6Pktinfo into a socket control message of type IPV6_PKTINFO.
+func PktInfo6(info *Inet6Pktinfo) []byte {
+	b := make([]byte, CmsgSpace(SizeofInet6Pktinfo))
+	h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
+	h.Level = SOL_IPV6
+	h.Type = IPV6_PKTINFO
+	h.SetLen(CmsgLen(SizeofInet6Pktinfo))
+	*(*Inet6Pktinfo)(h.data(0)) = *info
+	return b
+}
+
+// ParseOrigDstAddr decodes a socket control message containing the original
+// destination address. To receive such a message the IP_RECVORIGDSTADDR or
+// IPV6_RECVORIGDSTADDR option must be enabled on the socket.
+func ParseOrigDstAddr(m *SocketControlMessage) (Sockaddr, error) {
+	switch {
+	case m.Header.Level == SOL_IP && m.Header.Type == IP_ORIGDSTADDR:
+		pp := (*RawSockaddrInet4)(unsafe.Pointer(&m.Data[0]))
+		sa := new(SockaddrInet4)
+		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
+		sa.Port = int(p[0])<<8 + int(p[1])
+		sa.Addr = pp.Addr
+		return sa, nil
+
+	case m.Header.Level == SOL_IPV6 && m.Header.Type == IPV6_ORIGDSTADDR:
+		pp := (*RawSockaddrInet6)(unsafe.Pointer(&m.Data[0]))
+		sa := new(SockaddrInet6)
+		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
+		sa.Port = int(p[0])<<8 + int(p[1])
+		sa.ZoneId = pp.Scope_id
+		sa.Addr = pp.Addr
+		return sa, nil
+
+	default:
+		return nil, EINVAL
+	}
+}