From e10b74cd24557202109e8891e9364e77e3f40aef Mon Sep 17 00:00:00 2001
From: Jason Simmons <jsimmons@chromium.org>
Date: Wed, 23 Mar 2016 10:51:23 -0700
Subject: [PATCH] Set FLUTTER_ROOT to an absolute path

This implementation was taken from the Dart SDK shell scripts.

BUG=https://github.com/flutter/flutter/issues/2795
---
 bin/flutter | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/bin/flutter b/bin/flutter
index 08182b37578..883e48f9181 100755
--- a/bin/flutter
+++ b/bin/flutter
@@ -5,7 +5,19 @@
 
 set -e
 
-export FLUTTER_ROOT=$(dirname $(dirname "${BASH_SOURCE[0]}"))
+function follow_links() {
+  file="$1"
+  while [ -h "$file" ]; do
+    # On Mac OS, readlink -f doesn't work.
+    file="$(readlink "$file")"
+  done
+  echo "$file"
+}
+
+PROG_NAME="$(follow_links "$BASH_SOURCE")"
+BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
+export FLUTTER_ROOT="$(cd "${BIN_DIR}/.." ; pwd -P)"
+
 FLUTTER_TOOLS_DIR="$FLUTTER_ROOT/packages/flutter_tools"
 SNAPSHOT_PATH="$FLUTTER_ROOT/bin/cache/flutter_tools.snapshot"
 STAMP_PATH="$FLUTTER_ROOT/bin/cache/flutter_tools.stamp"