@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.

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 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%

set VM_OPTIONS=
set USING_DART_1=

rem We allow extra vm options to be passed in through an environment variable.
if not "_%DART_VM_OPTIONS%_" == "__" (
  set VM_OPTIONS=%VM_OPTIONS% %DART_VM_OPTIONS%
  for %%o in (%DART_VM_OPTIONS%) do (
    if "%%o" equ "--no-preview-dart-2" set USING_DART_1=y
  )
)

if defined USING_DART_1 (
  "%BIN_DIR%\dart" %VM_OPTIONS% "%BIN_DIR%\snapshots\pub.dart.snapshot" %*
) else (
  "%BIN_DIR%\dart" %VM_OPTIONS% "%BIN_DIR%\snapshots\pub2.dart.snapshot" %*
)

endlocal

exit /b %errorlevel%

:follow_links
setlocal
for %%i in (%1) do set result=%%~fi
set current=
for /f "usebackq tokens=2 delims=[]" %%i in (`dir /a:l "%~dp1" 2^>nul ^
                                             ^| find ">     %~n1 [" 2^>nul`) do (
  set current=%%i
)
if not "%current%"=="" call :follow_links "%current%", result
endlocal & set %~2=%result%
goto :eof

:end