Added Git version generator

fb2k/foo_input_vgmstream.vcxproj

@@ -83,6 +83,12 @@
       <DelayLoadDLLs>%(DelayLoadDLLs)</DelayLoadDLLs>
       <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
+    <PreBuildEvent>
+      <Command>"$(ProjectDir)genversion.bat" "$(ProjectDir)version.h" VERSION</Command>
+    </PreBuildEvent>
+    <PreBuildEvent>
+      <Message>Generating version.h</Message>
+    </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>

fb2k/genversion.bat

@@ -0,0 +1,48 @@
+@echo off
+
+setlocal enableextensions enabledelayedexpansion
+
+cd /d "%~dp0"
+
+for /f %%v in ('git describe --tags --match "r*"') do set version=%%v
+
+if not "%version%"=="" goto :gotversion
+
+if exist "..\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 (..\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 before and after every release.> "..\version.mk"
+echo %version_mk%>> "..\version.mk"
+
+:skipgenerate
+
+echo n | comp %1_temp %1 > NUL 2> NUL
+
+if not errorlevel 1 goto exit
+
+copy /y %1_temp %1 > NUL 2> NUL
+
+:exit
+
+del %1_temp