pak: add bat wrapper for windows

an easy-to-use drag-and-drop wrapper
and bump version to 2.0

appveyor.bat

@@ -18,4 +18,6 @@ set MSYSTEM=MINGW32
 call C:\msys64\usr\bin\bash -lc "cd \"$APPVEYOR_BUILD_FOLDER\" && exec ./test.sh"
 move /Y .\build_i686-w64-mingw32\pak.exe .\pak_mingw32.exe
 
+echo Packaging...
+7z a -mx9 chrome-pak.7z .\pak_mingw64.exe .\pak_mingw32.exe .\pack.bat .\unpack.bat
 echo Done.

appveyor.yml

@@ -1,4 +1,4 @@
-version: 0.0-{build}
+version: 2.0-{build}
 skip_tags: true
 build_script:
 - cmd: >-
@@ -11,5 +11,6 @@ test: off
 artifacts:
 - path: pak_mingw64.exe
 - path: pak_mingw32.exe
+- path: chrome-pak.7z
 cache:
   - tests

pack.bat

@@ -0,0 +1,15 @@
+@echo off
+setlocal EnableExtensions EnableDelayedExpansion
+if exist "%SystemRoot%\SysWOW64\cmd.exe" set x64=1
+set core_x64=pak_mingw64.exe
+set core_x86=pak_mingw32.exe
+set "WORK_DIR=%~dp0"
+set "file=%~1"
+set "pack_file=%~dpn1_packed.pak"
+if not exist "%WORK_DIR%" md "%WORK_DIR%"
+pushd "%WORK_DIR%"
+if "%x64%"=="1" ( set core=%core_x64% ) else ( set core=%core_x86% )
+if not exist %core% echo core program (%core%) NOT FOUND! &pause &exit
+if exist "%file%" %core% -p "%file%" "%pack_file%"
+if exist "%pack_file%" echo packed "%pack_file%" from "%file%"
+timeout /t 5||pause

unpack.bat

@@ -0,0 +1,16 @@
+@echo off
+setlocal EnableExtensions EnableDelayedExpansion
+if exist "%SystemRoot%\SysWOW64\cmd.exe" set x64=1
+set core_x64=pak_mingw64.exe
+set core_x86=pak_mingw32.exe
+set "WORK_DIR=%~dp0"
+set "file=%~1"
+set unpack_dir=%~dpn1_unpacked
+if not exist "%WORK_DIR%" md "%WORK_DIR%"
+pushd "%WORK_DIR%"
+if "%x64%"=="1" ( set core=%core_x64% ) else ( set core=%core_x86% )
+if not exist %core% echo core program (%core%) NOT FOUND! &pause &exit
+if not exist "%unpack_dir%" md "%unpack_dir%"
+if exist "%file%" %core% -u "%file%" "%unpack_dir%"
+if exist "%unpack_dir%\pak_index.ini" echo Unpacked "%file%" to "%unpack_dir%"
+timeout /t 5||pause