Fixes#58003
The .dart_tool directory can contain build assets, as well as the package_config.json file - the replacement for .packages. Remove it for the same reason we remove .packages
An upcoming Dart SDK change
(fa2fd41166)
changes the precise text of the exception generated by `utf8.decode`
if a non-UTF8 file is found. This is causing a breakage in the Dart
team's `flutter-analyze` bot (and will presumably cause a breakage in
the corresponding Flutter bot as soon as this change is rolled into
Flutter). To avoid this breakage, the bot shouldn't rely on the exact
exception text; it is sufficient to simply catch a FormatException.
Ensure iOS and android builds can be correctly cached. Use the performance-measurement-file to verify that all targets were skipped on the second invocation. This is only run on the flutter_gallery build.
This moves the app template more toward being a more generic starting
point for any Flutter application, eliminating some hard-code
assumptions about there being a single window/engine pair that is
directly bound to the life of the application:
- Moves the runloop into its own class, making it capable of servicing
any number of engine instances.
- Moves the logic for setting up a window containing only a Flutter view
into a window subclass for ease of re-use.
- Makes quit-on-window-close an optional property. (Long term this
should be even more generic, like a quit-when-last-window-closes
option, but this is a short-term improvement that removes the binding
between the runloop and the window).
- Allows for multiple instances of Win32Window to exist without issues
relating to the window class registration.
Since there are getting to be a non-trivial number of files associated
with the runner, this moves the source into a runner/ directory, as is
already done on some other platforms.
Note that creating multiple Flutter windows at the same time still
doesn't work correctly even with this change, but this addresses some of
the known issues, and makes it easier to test in the future (e.g., for
debugging engine-level issues with multiple instances).
Fixes#45397
Adds initial support for flutter create of apps and plugins. This is derived from the current FDE example app and sample plugin, adding template values where relevant.
Since the APIs/tooling/template aren't stable yet, the app template includes a version marker, which will be updated each time there's a breaking change. The build now checks that the template version matches the version known by that version of the tool, and gives a specific error message when there's a mismatch, which improves over the current breaking change experience of hitting whatever build failure the breaking change causes and having to figure out that the problem is that the runner is out of date. It also adds a warning to the create output about the fact that it won't be stable.
Plugins don't currently have a version marker since in practice this is not a significant problem for plugins yet the way it is for runners; we can add it later if that changes.
Fixes#30704
* Fix web test flakiness; enable web golden tests
The fix is three-part:
- Only allow one test to load _and_ test at any point in time.
- Use a fresh Chrome instance for each test file.
- Increase Cirrus resources.
The first two changes only fix the "Unknown error loading" error, but not hanging tests. The resource increase also prevents hanging tests.
Other minor changes:
- Remove test batching (it's no longer necessary)
- Fix the Chrome class, which was using the wrong Completer.
Move Flutter Gallery to dev/integration_tests/ as it is an older copy used only for testing. The current version of the Flutter Gallery now lives in https://github.com/flutter/gallery.
The stocks example app is outdated and deprecated, but we still use it for some benchmark tests. Moving it into the benchmarks directory to indicate its status.
dev_finder name is deprecated. device-finder is preferred.
Functionality remains identical, this is an aesthetic change.
This change was generated via:
$ find . -not -path '*/\.*' -type f -exec sed -i 's/(^import.*)!dev_finder/device-finder/g' {} \;
* [fuchsia] Create an entry-point script to run driver tests on Fuchsia
This script currently only paves the device. This will soon run a
driver test on a NUC in LUCI.
* reference the engine script and fix comment
* Update packages.
* Add many more global analyses.
* Catch trailing spaces and trailing newlines in all text files.
Before we were only checking newly added files, but that means we
missed some.
* Port the trailing spaces logic to work on Windows too.
* Correct all the files with trailing spaces and newlines.
* Refactor some of the dev/bots logic into a utils.dart library.
Notably, the "exit" and "print" shims for testing are now usable
from test.dart, analyze.dart, and run_command.dart.
* Add an "exitWithError" function that prints the red lines and
then exits. This is the preferred way to exit from test.dart,
analyze.dart, and run_command.dart.
* More consistency in the output of analyze.dart.
* Refactor analyze.dart to use the _allFiles file enumerating logic
more widely.
* Add some double-checking logic to the _allFiles logic to catch
cases where changes to that logic end up catching fewer files
than expected (helps prevent future false positives).
* Add a check to prevent new binary files from being added to
the repository. Grandfather in the binaries that we've already
added.
* Update all the dependencies (needed because we now import crypto in
dev/bots/analyze.dart).
* Support Flutter Driver test for Flutter Web application.
* Support Flutter Driver test for Flutter Web application.
* Fix documentation issues.
* Support Flutter Driver test for Flutter Web application.
* Fix documentation.
* Remove unused file from dartdoc check.
* Sync to date.
* Revert change to dartdoc.
* Address comments.
* Apply suggestions from code review
Co-Authored-By: Jonah Williams <jonahwilliams@google.com>
* Update copyrights.
* Update allowed list for browsers.
* Verify command line arguments for Drive command is correctly parsed.
* Make waitUntilFirstFrameRasterized throw unimplementedError for Flutter Web Driver.
* Add comment for why sync WebDriver is used.
* Update documentations.
* Add more unit tests and update documentation.
* Configure test.dart so that web_extension_test will be executed with --platform=chrome.
* Revert unnecessary changes.
* Add new file path for Windows to blacklist.
* Reconstruct the structure of flutter_driver/test/src folder to remove filtering logic in dev/bots/test.dart/
* Fix path to web_extension_test.dart.
* Add instructions for how to use WebFlutterDriver.
* Update getLayerTree to use sendCommand instead of _sendCommand.
* Update pubspec files.
* Add tests to gen_l10n.dart tool
* Separate out LocalizationsGenerator class to improve testability of code
* Add testing dependencies to dev/tools
* Integrate dev/tools testing to flutter CI
* Restructure dev/tools folder for testing
* Fix license headers
* Relicense Shrine demo to match rest of repository
The Shrine demo was Apache-licensed. The code was mostly
Google-written, with contributions from:
- Michelle Dudley (@michdud)
- Abhijeeth Padarthi <rkinabhi@gmail.com> (@rkinabhi)
- @a14n
I contacted all three, and they confirmed their approval for this
change, as described below.
Abhijeeth Padarthi said by e-mail on Thu, Nov 21, 2019 at 5:48 PM:
> hi Ian,
>
> sure :)
>
> let me know if I need to do anything on my end..
Michelle Dudley wrote by e-mail on Sun, Nov 24, 2019 at 2:07 PM:
> Hi Ian,
>
> That would be ok with me.
>
> Thanks,
>
> Michelle
@a14n said on Discord's Flutter server in the #hackers channel at 10:44PM on Thursday, November 21, 2019:
> @Hixie no problem I agree with this relicensing
* Remove shrine loophole from license checker.
* Update project.pbxproj files to say Flutter rather than Chromium
Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.
* Update the copyright notice checker to require a standard notice on all files
* Update copyrights on Dart files. (This was a mechanical commit.)
* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.
Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).
* Clean up the copyrights in non-Dart files. (Manual edits.)
Also, make sure templates don't have copyrights.
* Fix some more ORGANIZATIONNAMEs
This fixes the sample code analysis to treat dartpad snippets in the same way as snippet snippets, which it wasn't until now (the snippet generator was treating them as "samples"), and some errors crept in. This PR also fixes those errors.
Also, added a --verbose option to the sample analyzer.
* Add smoke test for the new Android embedding
* Update AndroidManifest.xml in app template
* Update test README.md
* Remove widget_test.dart
* Update pubspec.yaml
* Force GeneratedPluginRegistrant.java
* Stop using build_runner for dart2js
* fixes to yield when computing hashes and to imports
* add missing await
* Update filecache_test.dart
* Fix paths in filecache test
* use file uri for import
* add test cases and configurable override
* remove test dep
* fix filepaths for windows
* test no longer failing
* fix paths for test cases
* fix typo
* address comments
* make a constant
* make filehash async and use constant
* fix silly logic error
Spawn no more than 1 iframe in web tests. Using multiple iframes in DDK mode times out tests. Also set concurrency to 1 to guarantee that the test runner does not even attempt to parallelize tests.
Before this change, having an Android app depend on a plugin that has no android implementation resulted in a Gradle build failure.
This scenario is likely to become more common if we're enabling federated plugins, as the package implementing just the desktop implementation of a plugin won't have an Android implementation.
This changes the Gradle plugin to not try to build any plugins that doesn't have an android/build.gradle file.
* WIP on web plugin registry
* WIP on registering plugins
* WIP on web plugin registration
* Only generate `package:flutter_web_plugins` imports if plugins are
defined
* Add parsing test
* Add documentation
* Fix analyzer warnings
* add license headers
* Add tests for package:flutter_web_plugins
* Run `flutter update-packages --force-upgrade`
* Fix analyzer errors
* Fix analyzer error in test
* Update copyright and remove flutter SDK constraints
* Enable tests since engine has rolled
* add flutter_web_plugins tests to bots
* Create an empty .packages file for WebFs test
Flutter widget tests assert if a test completes with timers still
pending. However, it can be hard to diagnose where a pending timer
came from. For example, a widget might consume a third-party library
that internally uses a timer.
I added a FakeAsync.pendingTimersDebugInfo getter to quiver
(https://github.com/google/quiver-dart/pull/500). Make flutter_test
use it.
Additionally modify Flutter's debugPrintStack to take an optional
StackTrace argument instead of always printing StackTrace.current.
Fixes#4237.
In another change (#37646), I want to test that a test fails and
prints expected output. I didn't see an existing way to do that, so
I modified `_runFlutterTest` and `runCommand` to allow capturing the
output. Currently capturing and printing output are mutually
exclusive since we don't need both.
Some awkward bits:
* There already exists a `runAndGetStdout` function that is very
similar to `runCommand`, and this change makes the conceptual
distinction more confusing.
* `runFlutterTest` has multiple code paths for different
configurations. I don't understand what the different paths are
for, and I added output checking only along one of them.
`flutter build aar`
This new build command works just like `flutter build apk` or `flutter build appbundle`, but for plugin and module projects.
This PR also refactors how plugins are included in app or module projects. By building the plugins as AARs, the Android Gradle plugin is able to use Jetifier to translate support libraries into AndroidX libraries for all the plugin's native code. Thus, reducing the error rate when using AndroidX in apps.
This change also allows to build modules as AARs, so developers can take these artifacts and distribute them along with the native host app without the need of the Flutter tool. This is a requirement for add to app.
`flutter build aar` generates POM artifacts (XML files) which contain metadata about the native dependencies used by the plugin. This allows Gradle to resolve dependencies at the app level. The result of this new build command is a single build/outputs/repo, the local repository that contains all the generated AARs and POM files.
In a Flutter app project, this local repo is used by the Flutter Gradle plugin to resolve the plugin dependencies. In add to app case, the developer needs to configure the local repo and the dependency manually in `build.gradle`:
repositories {
maven {
url "<path-to-flutter-module>build/host/outputs/repo"
}
}
dependencies {
implementation("<package-name>:flutter_<build-mode>:1.0@aar") {
transitive = true
}
}
`flutter build aar`
This new build command works just like `flutter build apk` or `flutter build appbundle`, but for plugin and module projects.
This PR also refactors how plugins are included in app or module projects. By building the plugins as AARs, the Android Gradle plugin is able to use Jetifier to translate support libraries into AndroidX libraries for all the plugin's native code. Thus, reducing the error rate when using AndroidX in apps.
This change also allows to build modules as AARs, so developers can take these artifacts and distribute them along with the native host app without the need of the Flutter tool. This is a requirement for add to app.
`flutter build aar` generates POM artifacts (XML files) which contain metadata about the native dependencies used by the plugin. This allows Gradle to resolve dependencies at the app level. The result of this new build command is a single build/outputs/repo, the local repository that contains all the generated AARs and POM files.
In a Flutter app project, this local repo is used by the Flutter Gradle plugin to resolve the plugin dependencies. In add to app case, the developer needs to configure the local repo and the dependency manually in `build.gradle`:
repositories {
maven {
url "<path-to-flutter-module>build/host/outputs/repo"
}
}
dependencies {
implementation("<package-name>:flutter_<build-mode>:1.0@aar") {
transitive = true
}
}
This disables the Firebase Test Lab release smoke test, I think it's failing for reasons that probably don't have to do with the commit that started failing (which I think is dd51afd).
This is blocking autoroll of flutter/engine@b7b791b which fixes a TODAY bug: #36079
This adds a maintenance script that will allow us to "unpublish" a release: basically remove it from the cloud storage so that we're no longer serving it from the website.
Obviously, gsutil access to the cloud storage server is required for this to function.
* Clean up some flutter_tools tests
* Remove arbitrary retry that happens even for fundamental errors, and generally clean up _DevFSHttpWriter.
* Update dependencies (requires fixes; see next commit)
* Fixes for new dependencies.
updates the regex the analyzer uses, so it should be able to recognize expressions such as
const Foo a = Foo(); as "other code" rather than a constructor call.
When we package Flutter, we used to find the "current" tag (which is the version number) by starting at the revision we are building on and looking backwards in time to find the most recent tag. This causes problems on release builds when we failed to tag properly.
This PR makes the packaging script be more strict by requiring the given revision to itself have a tag, but only when we're publishing the result. When we're not publishing the result, it's more lenient, since otherwise we couldn't test packaging on non-release commits.
I also renamed ProcessRunnerException to PreparePackageException, since we were using that exception more generally than just for processes.
* add trailing commas on list/map/parameters
* add trailing commas on Invocation with nb of arg>1
* add commas for widget containing widgets
* add trailing commas if instantiation contains trailing comma
* revert bad change
## Description
Also update the existing dart files with missing licenses.
Without the fix, we'll emit the following error message
```
License headers cannot be found at the beginning of the following files.
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter/lib/src/animation/tween_sequence.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter/test/material/raw_material_button_test.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter/test/widgets/async_lifecycle_test.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter/test/widgets/sliver_constraints_test.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter/test/widgets/app_test.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter/test/widgets/test_border.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter/test/widgets/physical_model_test.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter/test/widgets/inherited_model.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter_tools/lib/src/base/user_messages.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter_tools/test/src/pubspec_schema.dart
/usr/local/google/home/liyuqian/flutter/flutter/packages/flutter_tools/test/ios/simulators_test.dart
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
```
## Related Issues
Fixes https://github.com/flutter/flutter/issues/28368
## Checklist
Before you create this PR confirm that it meets all requirements listed below by checking the relevant checkboxes (`[x]`). This will ensure a smooth and quick review process.
- [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
- [x] My PR includes tests for *all* changed/updated/fixed behaviors (See [Test Coverage]).
- [x] All existing and new tests are passing.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] The analyzer (`flutter analyze --flutter-repo`) does not report any problems on my PR.
- [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I am willing to follow-up on review comments in a timely manner.
## Breaking Change
Does your PR require Flutter developers to manually update their apps to accommodate your change?
- [ ] Yes, this is a breaking change (Please read [Handling breaking changes]).
- [x] No, this is *not* a breaking change.
<!-- Links -->
[issue database]: https://github.com/flutter/flutter/issues
[Contributor Guide]: https://github.com/flutter/flutter/wiki/Tree-hygiene#overview
[Test Coverage]: https://github.com/flutter/flutter/wiki/Test-coverage-for-package%3Aflutter
[Flutter Style Guide]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo
[Features we expect every widget to implement]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[Handling breaking changes]: https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes
Adds SHA256 checksums to the released package database, in preparation for showing them on the download website. (I'll update the existing data by hand).
Fixes#28465
This fixes the offline Dash/Zeal docs generation to use the newly added dartdoc markers for different entity types to make it more exact when finding entity names.
Bumped Dartdoc to the next release.
This converts all remaining "## Sample code" segments into snippets, and fixes
the snippet generator to handle multiple snippets in the same dartdoc block
properly.
I also generated, compiled, and ran each of the existing application samples,
and fixed them up to be more useful and/or just run without errors.
This PR fixes these problems with examples:
1. Switching tabs in a snippet now works if there is more than one snippet in
a single dartdoc block.
2. Generation of snippet code now works if there is more than one snippet.
3. Contrast of text and links in the code sample block has been improved to
recommended levels.
4. Added five new snippet templates, including a "freeform" template to make
it possible to show examples that need to change the app instantiation.
5. Fixed several examples to run properly, a couple by adding the "Scaffold"
widget to the template, a couple by just fixing their code.
6. Fixed visual look of some of the samples when they run by placing many
samples inside of a Scaffold.
7. In order to make it easier to run locally, changed the sample analyzer to
remove the contents of the supplied temp directory before running, since
having files that hang around is problematic (only a problem when running
locally with the `--temp` argument).
8. Added a `SampleCheckerException` class, and handle sample checking
exceptions more gracefully.
9. Deprecated the old "## Sample code" designation, and added enforcement for
the deprecation.
10. Removed unnecessary `new` from templates (although they never appeared in
the samples thanks to dartfmt, but still).
Fixes#26398Fixes#27411
Now the sample analyzer can be run locally with:
dart dev/bots/analyze-sample-code.dart --temp=/tmp/samples
And it leaves /tmp/samples around so you can take a look at the code that was generated to see if it's the artificial environment that the samples are evaluated in that is the culprit for a failed analysis.
Before, you had to specify the whole path to the dart executable, and had to modify the code to keep the tempdir around.
This changes the DocSetPlatformFamily key to be "dartlang" instead of the name of the package (usually "flutter"). This is so that the IntelliJ plugin for Dash will be able to go directly to the docs for a symbol from a keystroke, instead of needing to search all the docsets each time.
Without this, flutter isn't part of the list of package names it searches. After this, it finds the flutter docs because they're declared to be part of the "dartlang" family of docs.
Dashing doesn't have a way to configure this, so we modify the Info.plist directly to make the change.
This was causing analysis to fail when there was an import statement in a comment, such as when snippets add imports to their examples.
I narrowed the RegExp to match only those lines which aren't commented out, but it really should probably be using the analysis server to catch all cases (e.g. if someone put the doc comment into /** */ comments, it could still match). Since this is a Flutter-specific script, it's probably not worth doing that.
* Fall back to ANDROID_SDK_ROOT if ANDROID_HOME is not set
And update descriptions to use the non-deprecated ANDROID_SDK_ROOT.
Fixes#15114.
* Remove trailing whitespace
* Update dev/devicelab/lib/framework/adb.dart
Co-Authored-By: DanTup <danny@tuppeny.com>
* Reformat long line
* Allow snippets tool to be run from arbitrary CWDs
* Drop use of absolute when using Platform.executable (path is not relative, might require PATH resolution)
* canonicalize paths
* Use path.fromUri consistently to resolve file URIs
* Force commit to try to kick Cirrus
* Force commit to kick Cirrus, again
This sets the favicon for the offline Dash/Zeal docs.
Also, sets up the OpenSearch Description metadata file so that people can create custom search shortcuts for the API docs site.
Fixes#6412
(re-land of #24244)
This generates a zip file containing all of the docs, and uploads it when we publish docs, as well as a
Dash/Zeal docset that contains a feed of the docs.
Addresses at least part of #9955
* Revert "Add dashing config file for generating docset from flutter docs (#24374)"
This reverts commit ec8ca8606c.
* Revert "Update driver script to execute test through test_core (#24168)"
This reverts commit 6c62cf337f.
This generates a zip file containing all of the docs, and uploads it when we publish docs, as well as a
Dash/Zeal docset that contains a feed of the docs.
Addresses at least part of #9955
This converts existing ## Sample code samples to {@tool sample}...{@end-tool} form.
Also:
1. Fixed a minor bug in analyze-sample-code.dart
2. Made the snippet tool only insert descriptions if the description is non-empty.
3. Moved the Card diagram to before the code sample.
When converting all of the samples to use the snippet tool, I encountered some bugs/shortcomings:
1. The document production took 90 minutes, since the snippet tool was being invoked from the command line each time. I fixed this by snapshotting the executable before running, so it's down to 7 minutes.
2. The sample code was not being properly escaped by the snippet tool, so generics were causing issues in the HTML output. It is now quoted.
3. Code examples that used languages other than Dart were not supported. Anything that highlight.js was compiled for dartdoc with is now supported.
4. The comment color for highlight.js was light grey on white, which was pretty unreadable. It's now dark green and bold.
This rewrites the sample code analysis script to be a little less of a hack (but still not pretty), and to handle snippets as well.
It also changes the semantics of how sample code is handled: the namespace for the sample code is now limited to the file that it appears in, so some additional "Examples can assume:" blocks were added. The upside of this is that there will be far fewer name collisions.
I fixed the output too: no longer will you get 4000 lines of numbered output with the error at the top and have to grep for the actual problem. It gives the filename and line number of the original location of the code (in the comment in the tree), and prints out the source code on the line that caused the problem along with the error.
For snippets, it prints out the location of the start of the snippet and the source code line that causes the problem. It can't print out the original line, because snippets get formatted when they are written, so the line might not be in the same place.
* Avoid abbreviations
* Sample code for AppBar.leading
* Add a test for OverflowBox/FractionallySizedBox
* Minor wording improvements in the text.
The words "note that" here don't really contribute to the flow.
This creates a custom dartdoc tool that will generate snippet blocks in our API docs that allow the user to copy easily to the clipboard, and will also embed the snippet code into a template to show it in a larger context with an app.
This PR adds the snippet tool, a template, and a couple of HTML skeleton files, one for snippets that are designed to be in an application setting, and one where it simply puts a nice container around existing snippets, making them easier to copy to the clipboard.
This attempts to re-land #22656.
There are two changes from the original:
I turned off wrapping completely when not sending output to a terminal. Previously I had defaulted to wrapping at and arbitrary 100 chars in that case, just to keep long messages from being too long, but that turns out the be a bad idea because there are tests that are relying on the specific form of the output. It's also pretty arbitrary, and mostly people sending output to a non-terminal will want unwrapped text.
I found a better way to terminate ANSI color/bold sequences, so that they can be embedded within each other without needed quite as complex a dance with removing redundant sequences.
As part of these changes, I removed the Logger.supportsColor setter so that the one source of truth for color support is in AnsiTerminal.supportsColor.
* Turn on line wrapping again in usage and status messages, adds ANSI color to doctor and analysis messages. (#22656)
This turns on text wrapping for usage messages and status messages. When on a terminal, wraps to the width of the terminal. When writing to a non-terminal, wrap lines at a default column width (currently defined to be 100 chars). If --no-wrap is specified, then no wrapping occurs. If --wrap-column is specified, wraps to that column (if --wrap is on).
Adds ANSI color to the doctor and analysis output on terminals. This is in this PR with the wrapping, since wrapping needs to know how to count visible characters in the presence of ANSI sequences. (This is just one more step towards re-implementing all of Curses for Flutter. :-)) Will not print ANSI sequences when sent to a non-terminal, or of --no-color is specified.
Fixes ANSI color and bold sequences so that they can be combined (bold, colored text), and a small bug in indentation calculation for wrapping.
Since wrapping is now turned on, also removed many redundant '\n's in the code.
Adds a Fuchsia compatibility function that allows for connecting to a
specific Isolate by name when running Flutter Driver on a Fuchsia
device. This will check over multiple Dart VM's in an attempt to find
an Isolate by its name.
This turns on text wrapping for usage messages and status messages. When on a terminal, wraps to the width of the terminal. When writing to a non-terminal, wrap lines at a default column width (currently defined to be 100 chars). If --no-wrap is specified, then no wrapping occurs. If --wrap-column is specified, wraps to that column (if --wrap is on).
Adds ANSI color to the doctor and analysis output on terminals. This is in this PR with the wrapping, since wrapping needs to know how to count visible characters in the presence of ANSI sequences. (This is just one more step towards re-implementing all of Curses for Flutter. :-)) Will not print ANSI sequences when sent to a non-terminal, or of --no-color is specified.
Fixes ANSI color and bold sequences so that they can be combined (bold, colored text), and a small bug in indentation calculation for wrapping.
Since wrapping is now turned on, also removed many redundant '\n's in the code.
