shithub: opus

ref: 9283114fa1096355ac1a8e25a7f524106963a4ab
dir: /win32/genversion.bat/

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@echo off

setlocal enableextensions enabledelayedexpansion

for /f %%v in ('git describe --tags --match "v*"') do set version=%%v

if not "%version%"=="" goto :gotversion

if exist "%~dp0..\version.mk" goto :getversion

echo Git cannot be found, nor can version.mk. Generating unknown version.

set version=unknown

goto :gotversion

:getversion

for /f "delims== tokens=2" %%v in (%~dp0..\version.mk) do set version=%%v

set version=!version:^"=!
set version=!version: =!

:gotversion

set version_out=#define %2 "%version%"
set version_mk=%2 = "%version%"

echo %version_out%> %1_temp

if %version%==unknown goto :skipgenerate

echo # static version string; update manually every release.> "%~dp0..\version.mk"
echo %version_mk%>> "%~dp0..\version.mk"

:skipgenerate

echo n | comp %1_temp %1 > NUL 2> NUL

if not errorlevel 1 goto exit

copy /y %1_temp %1

:exit

del %1_temp