Skip building if project already built

Common/3dParty/v8/build.bat

@@ -11,52 +11,50 @@ if defined ProgramFiles(x86) (
 	SET PATH=%ProgramFiles%\Microsoft Visual Studio 12.0\Common7\IDE;%PATH%
 )
 
-echo "building x86... -------------------------------------------"
+if not exist "win_32" (
+  echo "building x86... -------------------------------------------"
+  
+  md win_32
+  md win_32\debug
+  md win_32\release
 
-if exist "win_32" (
-	RMDIR "win_32" /S /Q
-)
-md win_32
-md win_32\debug
-md win_32\release
+  call python v8\build\gyp_v8
+  call .\change_projects.bat
 
-call python v8\build\gyp_v8
-call .\change_projects.bat
+  cd "%SCRIPTPATH%v8\tools\gyp"
 
-cd "%SCRIPTPATH%v8\tools\gyp"
+  call devenv v8.sln /Rebuild "Release"
+  call devenv v8.sln /Rebuild "Debug"
 
-call devenv v8.sln /Rebuild "Release"
-call devenv v8.sln /Rebuild "Debug"
+  cd "%SCRIPTPATH%"
 
-cd "%SCRIPTPATH%"
+  XCOPY /Y "v8\build\Release\lib\*" "win_32\release\"
+  XCOPY /Y "v8\build\Release\icudt.dll" "win_32\release\"
 
-XCOPY /Y "v8\build\Release\lib\*" "win_32\release\"
-XCOPY /Y "v8\build\Release\icudt.dll" "win_32\release\"
+  XCOPY /Y "v8\build\Debug\lib\*" "win_32\debug\"
+  XCOPY /Y "v8\build\Debug\icudt.dll" "win_32\debug\"
+)
 
-XCOPY /Y "v8\build\Debug\lib\*" "win_32\debug\"
-XCOPY /Y "v8\build\Debug\icudt.dll" "win_32\debug\"
+if not exist "win_64" (
+  echo "building x64... -------------------------------------------"
 
-echo "building x64... -------------------------------------------"
+  md win_64
+  md win_64\debug
+  md win_64\release
 
-if exist "win_64" (
-	RMDIR "win_64" /S /Q
-)
-md win_64
-md win_64\debug
-md win_64\release
+  call python v8\build\gyp_v8 -Dtarget_arch=x64
+  call .\change_projects.bat
 
-call python v8\build\gyp_v8 -Dtarget_arch=x64
-call .\change_projects.bat
+  cd "%SCRIPTPATH%v8\tools\gyp"
 
-cd "%SCRIPTPATH%v8\tools\gyp"
+  call devenv v8.sln /Rebuild "Release"
+  call devenv v8.sln /Rebuild "Debug"
 
-call devenv v8.sln /Rebuild "Release"
-call devenv v8.sln /Rebuild "Debug"
+  cd "%SCRIPTPATH%"
 
-cd "%SCRIPTPATH%"
+  XCOPY /Y "v8\build\Release\lib\*" "win_64\release\"
+  XCOPY /Y "v8\build\Release\icudt.dll" "win_64\release\"
 
-XCOPY /Y "v8\build\Release\lib\*" "win_64\release\"
-XCOPY /Y "v8\build\Release\icudt.dll" "win_64\release\"
-
-XCOPY /Y "v8\build\Debug\lib\*" "win_64\debug\"
-XCOPY /Y "v8\build\Debug\icudt.dll" "win_64\debug\"
+  XCOPY /Y "v8\build\Debug\lib\*" "win_64\debug\"
+  XCOPY /Y "v8\build\Debug\icudt.dll" "win_64\debug\"
+)