setup env with bat

env_bat

@echo off
setlocal EnableDelayedExpansion
setlocal EnableExtensions

set dir=%~dp0
set ligGit2Path=%dir%third_party\libgit2
set pkgConfigPath=%dir%third_party\pkg-config
set zlibPath=%dir%third_party\zlib

set KEY_NAME="HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment"
set LIBGIT2_HOME=LIBGIT2_HOME
set PKG_CONFIG_PATH=PKG_CONFIG_PATH
set ZLIB_HOME=ZLIB_HOME

set bin=bin
set include=include
set lib=lib

call :checkEnv %KEY_NAME% %LIBGIT2_HOME% %ligGit2Path% "true"
call :checkEnv %KEY_NAME% %PKG_CONFIG_PATH% %pkgConfigPath% "false"
call :checkEnv %KEY_NAME% %ZLIB_HOME% %zlibPath% "true"
exit /b %errorlevel%

:checkEnv
for /F "usebackq skip=2 tokens=1-4" %%A in (`reg query %1 /v %2 2^>nul`) do (
  set valueName=%%A
  set valueType=%%B
  set valueValue=%%C %%D
)

if defined valueName (
  REM @echo Value name = %valueName%
  REM @echo Value type = %valueType%
  REM @echo Value value = %valueValue%
  echo %2 already setup. %valueValue%
) else (
  @echo %1 %2 not found, setup
  reg add %1 /v %2 /d %3 /f
  if "%4"=="true" setx path "%path%;%3\%bin%;%3\%include%;%3\%lib%"
)
exit /b %errorlevel%