bpo-27593: Updates Windows build to use information from git (#262) (#…

…448)

* bpo-27593: Updates Windows build to use information from git (#262)

* bpo-27593: Updates Windows build to use information from git

* Fixes git command (#451)

PCbuild/build.bat

@@ -104,6 +104,10 @@ if "%platf%"=="x64" (
     )
 )
 
+if not exist "%GIT%" where git > "%TEMP%\git.loc" 2> nul && set /P GIT= < "%TEMP%\git.loc" & del "%TEMP%\git.loc"
+if exist "%GIT%" set GITProperty=/p:GIT="%GIT%"
+if not exist "%GIT%" echo Cannot find Git on PATH & set GITProperty=
+
 rem Setup the environment
 call "%dir%env.bat" %vs_platf% >nul
 
@@ -140,7 +144,7 @@ msbuild "%dir%pcbuild.proj" /t:%target% %parallel% %verbose%^
  /p:Configuration=%conf% /p:Platform=%platf%^
  /p:IncludeExternals=%IncludeExternals%^
  /p:IncludeSSL=%IncludeSSL% /p:IncludeTkinter=%IncludeTkinter%^
- /p:IncludeBsddb=%IncludeBsddb%^
+ /p:IncludeBsddb=%IncludeBsddb% %GITProperty%^
  %1 %2 %3 %4 %5 %6 %7 %8 %9
 
 @echo off

PCbuild/pythoncore.vcxproj

@@ -391,17 +391,25 @@
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
   <Target Name="_GetBuildInfo" BeforeTargets="PrepareForBuild">
-    <Exec Command="hg id -b &gt; &quot;$(IntDir)hgbranch.txt&quot;" ContinueOnError="true" />
-    <Exec Command="hg id -i &gt; &quot;$(IntDir)hgversion.txt&quot;" ContinueOnError="true" />
-    <Exec Command="hg id -t &gt; &quot;$(IntDir)hgtag.txt&quot;" ContinueOnError="true" />
     <PropertyGroup>
-      <HgBranch Condition="Exists('$(IntDir)hgbranch.txt')">$([System.IO.File]::ReadAllText('$(IntDir)hgbranch.txt').Trim())</HgBranch>
-      <HgVersion Condition="Exists('$(IntDir)hgversion.txt')">$([System.IO.File]::ReadAllText('$(IntDir)hgversion.txt').Trim())</HgVersion>
-      <HgTag Condition="Exists('$(IntDir)hgtag.txt')">$([System.IO.File]::ReadAllText('$(IntDir)hgtag.txt').Trim())</HgTag>
+      <GIT Condition="$(GIT) == ''">git</GIT>
+      <_GIT>$(GIT)</_GIT>
+      <_GIT Condition="$(GIT.Contains(` `))">"$(GIT)"</_GIT>
     </PropertyGroup>
+    <Message Text="Getting build info from $(_GIT)" Importance="high" />
+    <MakeDir Directories="$(IntDir)" Condition="!Exists($(IntDir))" />
+    <Exec Command="$(_GIT) name-rev --name-only HEAD &gt; &quot;$(IntDir)gitbranch.txt&quot;" ContinueOnError="true" />
+    <Exec Command="$(_GIT) rev-parse HEAD &gt; &quot;$(IntDir)gitversion.txt&quot;" ContinueOnError="true" />
+    <Exec Command="$(_GIT) name-rev --tags --name-only HEAD &gt; &quot;$(IntDir)gittag.txt&quot;" ContinueOnError="true" />
+    <PropertyGroup>
+      <GitBranch Condition="Exists('$(IntDir)gitbranch.txt')">$([System.IO.File]::ReadAllText('$(IntDir)gitbranch.txt').Trim())</GitBranch>
+      <GitVersion Condition="Exists('$(IntDir)gitversion.txt')">$([System.IO.File]::ReadAllText('$(IntDir)gitversion.txt').Trim())</GitVersion>
+      <GitTag Condition="Exists('$(IntDir)gittag.txt')">$([System.IO.File]::ReadAllText('$(IntDir)gittag.txt').Trim())</GitTag>
+    </PropertyGroup>
+    <Message Text="Building $(GitTag):$(GitVersion) $(GitBranch)" Importance="high" />
     <ItemGroup>
       <ClCompile Include="..\Modules\getbuildinfo.c">
-        <PreprocessorDefinitions>HGVERSION="$(HgVersion)";HGTAG="$(HgTag)";HGBRANCH="$(HgBranch)";%(PreprocessorDefinitions)</PreprocessorDefinitions>
+        <PreprocessorDefinitions>GITVERSION="$(GitVersion)";GITTAG="$(GitTag)";GITBRANCH="$(GitBranch)";%(PreprocessorDefinitions)</PreprocessorDefinitions>
       </ClCompile>
     </ItemGroup>
   </Target>