Make dartdoc.bat work with snapshots and run in the repo.

sdk/bin/dartdoc.bat

 @echo off
 REM Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 REM for details. All rights reserved. Use of this source code is governed by a
 REM BSD-style license that can be found in the LICENSE file.
 
-set SCRIPTPATH=%~dp0
+setlocal
+rem Handle the case where dart-sdk/bin has been symlinked to.
+set DIR_NAME_WITH_SLASH=%~dp0
+set DIR_NAME=%DIR_NAME_WITH_SLASH:~0,-1%%
+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
 
-REM Does the path have a trailing slash? If so, remove it.
-if %SCRIPTPATH:~-1%== set SCRIPTPATH=%SCRIPTPATH:~0,-1%
+rem Get absolute full name for SDK_DIR.
+for %%i in ("%BIN_DIR%\..\") do set SDK_DIR=%%~fi
 
-set arguments=%*
-rem set SNAPSHOTNAME="%SCRIPTPATH%dartdoc.snapshot"
-rem if exist %SNAPSHOTNAME% set SNAPSHOT=--use-script-snapshot=%SNAPSHOTNAME%
+rem Remove trailing backslash if there is one
+IF %SDK_DIR:~-1%==\ set SDK_DIR=%SDK_DIR:~0,-1%
 
-:: The trailing forward slash in --package-root is required because of issue
-:: 9499.
-"%SCRIPTPATH%dart" --heap_growth_rate=32 "--package-root=%SCRIPTPATH%..\packages/" %SNAPSHOT% "%SCRIPTPATH%..\lib\_internal\dartdoc\bin\dartdoc.dart" %arguments%
+set DARTDOC=%SDK_DIR%\lib\_internal\dartdoc\bin\dartdoc.dart
+set DART=%BIN_DIR%\dart
+set SNAPSHOT=%BIN_DIR%\snapshots\utils_wrapper.dart.snapshot
+
+if not defined DART_CONFIGURATION set DART_CONFIGURATION=ReleaseIA32
+
+set BUILD_DIR=%SDK_DIR%\..\build\%DART_CONFIGURATION%
+if exist "%SNAPSHOT%" (
+  "%DART%" "%SNAPSHOT%" "dartdoc" %*

[dgrove, 2013/06/06 22:17:42]

In the existing sdk/bin/dartdoc, it passes in --library-root . Not sure if you
want this. It also passes in --package-root.

[Bob Nystrom, 2013/06/06 22:27:55]

I'm not sure if those are something the script can provide or not. It's passing
in --package-root twice: once for Dart and once for Dartdoc. We definitely don't
need the former since it's running from a snapshot.

I don't think the latter is correct either: users should be using their app's
packages directory and not the SDK's. I'm not sure about --library-root. :(

+) else (
+  :: The trailing forward slash in --package-root is required because of issue
+  :: 9499.
+  "%BUILD_DIR%\dart-sdk\bin\dart" "--package-root=%BUILD_DIR%\packages/" "%DARTDOC%" %*
+)
+
+endlocal
+
+exit /b %errorlevel%
+
+:follow_links
+setlocal
+for %%i in (%1) do set result=%%~fi
+set current=
+for /f "tokens=2 delims=[]" %%i in ('dir /a:l ^"%~dp1^" 2^>nul ^
+                                     ^| find ">     %~n1 ["') do (
+  set current=%%i
+)
+if not "%current%"=="" call :follow_links "%current%", result
+endlocal & set %~2=%result%
+goto :eof
+
+:end