Directory.Build.targets

<Project>
  <Target
    Name="SetVersions"
    BeforeTargets="GetAssemblyVersion;GetPackageVersion;InitializeSourceControlInformation"
    Returns="Version">
    <Exec
      Command="git for-each-ref --sort=taggerdate --format '%25(refname)' refs/tags"
      ConsoleToMSBuild="true"
      StandardOutputImportance="low">
      <Output TaskParameter="ConsoleOutput" ItemName="GitOutput"/>
    </Exec>
    <ItemGroup>
      <GitTag
        Condition="$([System.Text.RegularExpressions.Regex]::IsMatch(%(Filename)%(Extension), '^v\d+\.\d+\.\d+(-\w+)?$'))"
        Include="$([System.String]::Copy(%(GitOutput.Filename)%(GitOutput.Extension)).Substring(1))"/>
    </ItemGroup>
    <PropertyGroup>
      <PackageVersion>%(GitTag.Identity)</PackageVersion>
    </PropertyGroup>
    <PropertyGroup>
      <PackageVersion Condition="'$(PackageVersion)' == ''">0.0.0</PackageVersion>
      <Version>$(PackageVersion)</Version>
    </PropertyGroup>
    <Message
      Text="PackageVersion: $(PackageVersion)"
      Importance="high"/>
  </Target>
</Project>