GitAssemblyVersion.targets

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <MSBuildCommunityTasksPath Condition=" '$(MSBuildCommunityTasksPath)' == '' ">$(SolutionDir)\.build</MSBuildCommunityTasksPath>
    <AssemblyInfoFile Condition=" '$(AssemblyInfoFile)' == '' ">$(MsBuildProjectDirectory)\Properties\AssemblyInfo.cs</AssemblyInfoFile>
    <GeneratedAssemblyInfoFile Condition=" '$(GeneratedAssemblyInfoFile)' == '' ">$(MsBuildProjectDirectory)\Properties\GeneratedAssemblyInfo.cs</GeneratedAssemblyInfoFile>
    <BuildDependsOn>
      ReadAssemblyVersion;
      SetAssemblyVersion;
      $(BuildDependsOn)
    </BuildDependsOn>
    <CleanDependsOn>
      $(CleanDependsOn);
      SetAssemblyVersionClean
    </CleanDependsOn>
  </PropertyGroup>
  
  <Import Project="$(MSBuildCommunityTasksPath)\MSBuild.Community.Tasks.targets" />
  
  <Target Name="ReadAssemblyVersion">
    <ReadLinesFromFile File="$(AssemblyInfoFile)">
      <Output TaskParameter="Lines" ItemName="ItemsFromFile"/>
    </ReadLinesFromFile>
    <PropertyGroup>
      <Pattern>;\s*\[assembly\s*:\s*AssemblyVersion.*?"(.*?)"</Pattern>
      <In>@(ItemsFromFile)</In>
      <AssemblyVersion>$([System.Text.RegularExpressions.Regex]::Match($(In), $(Pattern)).Groups.get_Item(1))</AssemblyVersion>
    </PropertyGroup>
  </Target>
  <Target Name="SetAssemblyVersion">
    <GitVersion LocalPath="$(SolutionDir)">
      <Output TaskParameter="CommitHash" PropertyName="CommitHash" />
    </GitVersion>
    <GitBranch LocalPath="$(SolutionDir)">
      <Output TaskParameter="Branch" PropertyName="Branch" />
    </GitBranch>
    <GitPendingChanges LocalPath="$(MSBuildProjectDirectory)">
      <Output TaskParameter="HasPendingChanges" PropertyName="IsDirty" />
    </GitPendingChanges>
    <PropertyGroup Condition="'$(IsDirty)'==True">
      <Dirty>-dirty</Dirty>
    </PropertyGroup>
    <PropertyGroup Condition="'$(IsDirty)'==False">
      <Dirty />
    </PropertyGroup>
    <PropertyGroup Condition="'$(Branch)'!=''">
      <BranchInfo> ($(Branch))</BranchInfo>
    </PropertyGroup>
    <AssemblyInfo CodeLanguage="CS" OutputFile="$(GeneratedAssemblyInfoFile)" AssemblyInformationalVersion="$(AssemblyVersion)-$(CommitHash)$(Dirty)$(BranchInfo)" />
  </Target>
  <Target Name="SetAssemblyVersionClean" Condition="Exists($(GeneratedAssemblyInfoFile))">
    <Delete Files="$(GeneratedAssemblyInfoFile)" />
  </Target>
</Project>