CSMS/Directory.Build.props at master · OpenChargingCloud/CSMS · GitHub

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<Project>

  <!--
    Where this assembly came from, recorded while it is being built.

    A launcher that reads git at startup describes the working tree as it is at
    startup. This describes the tree the code was actually compiled from, which
    is not the same thing: build at one commit, check out another, start without
    rebuilding, and a launcher reports the commit that is checked out while the
    running code is the one before it. A version in a bug report that looks
    right and is wrong costs more than no version at all.

    Both values are asked of git rather than written down here, so this file is
    byte-identical in every repository that carries it and cannot name the wrong
    one - including for a project that reaches it from a repository of its own,
    further down, which has no such file yet.

    rev-parse rather than describe, for two reasons. describe answers with a tag
    once a repository has any, and what is wanted here is a commit. And its
    dirty marker only sees tracked files: an SDK project compiles every .cs in
    its directory, so a source file that was never added to git is in the build
    while describe still calls the tree clean. That is the one case this stamp
    exists to catch, so the marker is taken from status instead, which sees it.

    The status lines are counted as items and never expanded into a condition.
    A file name holding a quote would otherwise take the condition apart, and a
    build that breaks over somebody's file name is a poor way to learn that.

    Without git - a source archive, a build machine with no client - the Execs
    fail, ContinueOnError keeps the build going, and the stamp reads "unknown".
    A missing provenance is not a reason to be unable to build.
  -->

  <Target Name="StampGitProvenance"
          BeforeTargets="GetAssemblyAttributes">

    <Exec Command="git -C &quot;$(MSBuildProjectDirectory)&quot; rev-parse --show-toplevel"
          ConsoleToMSBuild="true"
          StandardOutputImportance="low"
          StandardErrorImportance="low"
          ContinueOnError="true">
      <Output TaskParameter="ConsoleOutput" PropertyName="_GitToplevel" />
    </Exec>

    <Exec Command="git -C &quot;$(MSBuildProjectDirectory)&quot; rev-parse HEAD"
          ConsoleToMSBuild="true"
          StandardOutputImportance="low"
          StandardErrorImportance="low"
          ContinueOnError="true">
      <Output TaskParameter="ConsoleOutput" PropertyName="_GitHead" />
    </Exec>

    <Exec Command="git -C &quot;$(MSBuildProjectDirectory)&quot; status --porcelain"
          ConsoleToMSBuild="true"
          StandardOutputImportance="low"
          StandardErrorImportance="low"
          ContinueOnError="true">
      <Output TaskParameter="ConsoleOutput" ItemName="_GitStatusLine" />
    </Exec>

    <PropertyGroup>
      <_GitChangedFiles>@(_GitStatusLine->Count())</_GitChangedFiles>
      <_GitRepository Condition="'$(_GitToplevel)' != ''">$([System.IO.Path]::GetFileName($(_GitToplevel.Trim())))</_GitRepository>
      <_GitRepository Condition="'$(_GitRepository)' == ''">unknown</_GitRepository>
      <_GitCommit     Condition="'$(_GitHead)' != ''">$(_GitHead.Trim())</_GitCommit>
      <_GitCommit     Condition="'$(_GitCommit)' != '' and '$(_GitChangedFiles)' != '0'">$(_GitCommit)-dirty</_GitCommit>
      <_GitCommit     Condition="'$(_GitCommit)' == ''">unknown</_GitCommit>
    </PropertyGroup>

    <ItemGroup>
      <AssemblyAttribute Include="System.Reflection.AssemblyMetadataAttribute">
        <_Parameter1>GitRepository</_Parameter1>
        <_Parameter2>$(_GitRepository)</_Parameter2>
      </AssemblyAttribute>
      <AssemblyAttribute Include="System.Reflection.AssemblyMetadataAttribute">
        <_Parameter1>GitCommit</_Parameter1>
        <_Parameter2>$(_GitCommit)</_Parameter2>
      </AssemblyAttribute>
    </ItemGroup>

  </Target>

</Project>