Switch dartfmt in the SDK to run dart_style.

sdk/bin/dartfmt.bat

Index: sdk/bin/dartfmt.bat
diff --git a/sdk/bin/dartfmt.bat b/sdk/bin/dartfmt.bat
index 9cae1115fb0d47a89b8047343c7d0613b1282c60..55c7e4fc10df4c39e32f46fd59ea2c761ffb650e 100644
--- a/sdk/bin/dartfmt.bat
+++ b/sdk/bin/dartfmt.bat
@@ -11,27 +11,44 @@ call :follow_links "%DIR_NAME%", RETURNED_BIN_DIR
 rem Get rid of surrounding quotes.
 for %%i in ("%RETURNED_BIN_DIR%") do set BIN_DIR=%%~fi
 
+set DART=%BIN_DIR%\dart
+
 rem Get absolute full name for SDK_DIR.
 for %%i in ("%BIN_DIR%\..\") do set SDK_DIR=%%~fi
 
 rem Remove trailing backslash if there is one
-IF %SDK_DIR:~-1%==\ set SDK_DIR=%SDK_DIR:~0,-1%
+if %SDK_DIR:~-1%==\ set SDK_DIR=%SDK_DIR:~0,-1%
 
-set DARTFMT=%SDK_DIR%\..\packages\analyzer\bin\formatter.dart
-set DART=%BIN_DIR%\dart
-set SNAPSHOT=%BIN_DIR%\snapshots\dartfmt.dart.snapshot
+rem Get absolute full name for DART_ROOT.
+for %%i in ("%SDK_DIR%\..\") do set DART_ROOT=%%~fi
 
+rem Remove trailing backslash if there is one
+if %DART_ROOT:~-1%==\ set DART_ROOT=%DART_ROOT:~0,-1%
 
-if exist "%SNAPSHOT%" (
-  "%DART%" "%SNAPSHOT%" %*
-) else (
-  "%DART%" "%DARTFMT%" %*
-)
+set DARTFMT=%DART_ROOT%\third_party\pkg\dart_style\bin\format.dart
+
+rem DART_CONFIGURATION defaults to ReleaseIA32
+if "%DART_CONFIGURATION%"=="" set DART_CONFIGURATION=ReleaseIA32
+
+set BUILD_DIR=%DART_ROOT%\build\%DART_CONFIGURATION%
+
+set PACKAGE_ROOT=%BUILD_DIR%\packages
+
+"%DART%" "--package-root=%PACKAGE_ROOT%" "%DARTFMT%" %*
 
 endlocal
 
 exit /b %errorlevel%
 
+rem Follow the symbolic links (junctions points) using `dir to determine the
+rem canonical path. Output with a link looks something like this
+rem
+rem 01/03/2013  10:11 PM    <JUNCTION>     abc def
+rem [c:\dart_bleeding\dart-repo.9\dart\build\ReleaseIA32\dart-sdk]
+rem
+rem So in the output of 'dir /a:l "targetdir"' we are looking for a filename
+rem surrounded by right angle bracket and left square bracket. Once we get
+rem the filename, which is name of the link, we recursively follow that.
 :follow_links
 setlocal
 for %%i in (%1) do set result=%%~fi