update_commit_id.bat

@echo off
SETLOCAL EnableDelayedExpansion

REM ============================================================================
REM update_commit_id.bat - Generate version identifier from git repository
REM ============================================================================
REM This script generates commit_id.inc with CURRENT_GAMECORE_VERSION
REM Used to identify DLL version in crash dumps and debugging
REM ============================================================================

REM Check if git is available
where git >nul 2>&1
if %ERRORLEVEL% NEQ 0 (
	echo ERROR: git command not found. Cannot generate version identifier.
	echo const char CURRENT_GAMECORE_VERSION[] = "Unknown - Git Not Found"; //autogenerated > "%~dp0commit_id.inc"
	exit /b 1
)

REM Check working tree status
set STATUS=Clean
for /f "usebackq delims=" %%i in (`git status --untracked-files^=no --porcelain 2^>nul`) do (
	if [%%i] NEQ [] (
		set STATUS=Dirty
		echo Uncommitted change^(s^): %%i
	)
)

if "%STATUS%" == "Clean" (echo Nothing to commit, working tree clean.)

REM Get current commit hash (always available)
set HEADCOMMIT=
for /f "usebackq delims=" %%i in (`git rev-list --abbrev-commit -n 1 HEAD 2^>nul`) do set HEADCOMMIT=%%i

if "%HEADCOMMIT%" == "" (
	echo ERROR: Could not determine HEAD commit. Not in a git repository?
	echo const char CURRENT_GAMECORE_VERSION[] = "Unknown - Not Git Repo"; //autogenerated > "%~dp0commit_id.inc"
	exit /b 1
)

REM Try to get tag information using git describe
set TAG=
set TAGCOMMIT=
set DESCRIBE_OUTPUT=

REM Use git describe --tags --long to ALWAYS include commit hash
REM --long forces format: tag-distance-ghash even when on exact tag
REM Example: Release-5.1.2-0-gb44ce57d (on tag) or Release-5.1.3-7-g2d10a8a (after tag)
for /f "usebackq delims=" %%i in (`git describe --tags --long HEAD 2^>nul`) do set DESCRIBE_OUTPUT=%%i

if "!DESCRIBE_OUTPUT!" == "" (
	REM No tags found at all - use commit hash only
	echo WARNING: No git tags found. Using commit hash only.
	echo const char CURRENT_GAMECORE_VERSION[] = "No-Tag !HEADCOMMIT! !STATUS!"; //autogenerated, do not commit this file! > "%~dp0commit_id.inc"
	echo Version identifier will be "No-Tag !HEADCOMMIT! !STATUS!"
	goto :end
)

REM Parse git describe --long output
REM Format is ALWAYS: tag-distance-ghash
REM   Release-5.1.2-0-gb44ce57d         (exactly on tag, 0 commits after)
REM   Release-5.1.3-7-g2d10a8aee        (7 commits after tag)

echo Git describe output: !DESCRIBE_OUTPUT!

REM Use git describe --long output directly - always includes commit hash
REM Format is ALWAYS: tag-distance-ghash
REM   "Release-5.1.2-0-gb44ce57d"        (exactly on tag, hash b44ce57d)
REM   "Release-5.1.3-7-g2d10a8aee"       (7 commits after tag, hash 2d10a8aee)

echo const char CURRENT_GAMECORE_VERSION[] = "!DESCRIBE_OUTPUT! !STATUS!"; //autogenerated, do not commit this file! > "%~dp0commit_id.inc"
echo Version identifier will be "!DESCRIBE_OUTPUT! !STATUS!"

:end
ENDLOCAL