Build targets for Visual Studio to automatically include Git commit hash and other build metadata in assembly info

BuildAssemblyInfo.targets

<!--
Based on: https://gist.github.com/jonathanduke/ab4fc1880e8b245d3f939b122f301938#file-buildassemblyinfo-targets
Dependent on: https://gist.github.com/jonathanduke/ab4fc1880e8b245d3f939b122f301938#file-gitbuildprops-targets
Public domain: http://unlicense.org/
Modify as you wish, but you are encouraged to leave this comment for future reference in case the original is updated.
-->
<Project>

  <Import Project="GitBuildProps.targets" />

  <Target Name="BuildAssemblyInfo" BeforeTargets="BeforeBuild" DependsOnTargets="InitializeSourceControlInformation" Condition=" '$(Configuration)' == 'Release' ">
    <PropertyGroup Condition="!$(Deterministic)">
      <GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute>
    </PropertyGroup>
    <ItemGroup Condition="!$(Deterministic)">
      <AssemblyAttribute Include="AssemblyFileVersion">
        <_Parameter1>$(VersionPrefix.Substring(0,$(VersionPrefix.LastIndexOf('.')))).$([System.String]::Format("{0:%d}.{1:0}",$([System.DateTime]::Now.Subtract($([System.DateTime]::Parse("2000-01-01")))),$([MSBuild]::Divide($([System.DateTime]::Now.TimeOfDay.TotalSeconds),2))))</_Parameter1>
      </AssemblyAttribute>
    </ItemGroup>
    <ItemGroup Condition=" !$(Deterministic) And !('$(TargetFrameworkIdentifier)' == '.NETFramework' And $([MSBuild]::VersionLessThan($(TargetFrameworkVersion), 4.5))) ">
      <AssemblyAttribute Include="AssemblyMetadata">
        <_Parameter1>BuildDate</_Parameter1>
        <_Parameter2>$([System.String]::Format("{0:yyyy-MM-ddTHH:mm:sszzz}",$([System.DateTime]::Now)))</_Parameter2>
      </AssemblyAttribute>
    </ItemGroup>
    <ItemGroup Condition=" '$(SourceRevisionId)' != '' And !('$(TargetFrameworkIdentifier)' == '.NETFramework' And $([MSBuild]::VersionLessThan($(TargetFrameworkVersion), 4.5))) ">
      <AssemblyAttribute Include="AssemblyMetadata">
        <_Parameter1>SourceRevisionId</_Parameter1>
        <_Parameter2>$(SourceRevisionId)</_Parameter2>
      </AssemblyAttribute>
    </ItemGroup>
  </Target>
  
</Project>

Directory.Build.props

<!--
Based on: https://gist.github.com/jonathanduke/ab4fc1880e8b245d3f939b122f301938#file-directory-build-props
Public domain: http://unlicense.org/
Modify as you wish, but you are encouraged to leave this comment for future reference in case the original is updated.
-->
<Project>

  <PropertyGroup>
    <Product>Sample</Product>
    <Company>Example, Inc.</Company>
    <Copyright>Copyright © $([System.String]::Format("2019-{0:yyyy}",$([System.DateTime]::Now)).Replace("2019-2019", "2019")) $(Company)</Copyright>
    <Authors>$(Company)</Authors>
  </PropertyGroup>

  <PropertyGroup Condition=" '$(TargetFramework)$(Description)' == '' ">
    <Description>$(MSBuildProjectName)</Description>
  </PropertyGroup>

  <PropertyGroup Condition=" '$(Configuration)' != 'Release' And '$(VersionSuffix)' == '' ">
    <VersionSuffix>$(Configuration.ToLower())</VersionSuffix>
  </PropertyGroup>

  <PropertyGroup Condition=" '$(Configuration)' != 'Release' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <DefineConstants>$(DefineConstants);DEBUG;TRACE</DefineConstants>
    <Optimize>false</Optimize>
  </PropertyGroup>

  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
    <DebugType>pdbonly</DebugType>
    <DefineConstants>$(DefineConstants);RELEASE;TRACE</DefineConstants>
    <Optimize>true</Optimize>
    <PathMap>$(SolutionDir)=$(SolutionName)</PathMap>
  </PropertyGroup>

  <PropertyGroup>
    <LangVersion>latest</LangVersion>
    <Deterministic>false</Deterministic>
  </PropertyGroup>

</Project>

Directory.Build.targets

<!--
Based on: https://gist.github.com/jonathanduke/ab4fc1880e8b245d3f939b122f301938#file-directory-build-targets
Dependent on: https://gist.github.com/jonathanduke/ab4fc1880e8b245d3f939b122f301938#file-buildassemblyinfo-targets
Public domain: http://unlicense.org/
Modify as you wish, but you are encouraged to leave this comment for future reference in case the original is updated.
-->
<Project>

  <Import Project="BuildAssemblyInfo.targets" />

  <PropertyGroup Condition=" '$(VersionPrefix)' == '' ">
    <VersionPrefix>3.2.1</VersionPrefix>
  </PropertyGroup>

  <PropertyGroup Condition=" '$(VersionSuffix)' == '' ">
    <VersionSuffix>beta</VersionSuffix>
  </PropertyGroup>

  <PropertyGroup Condition=" '$(AssemblyVersion)' == '' And '$(VersionPrefix)' != '' ">
    <AssemblyVersion>$(VersionPrefix.Substring(0,$(VersionPrefix.LastIndexOf('.')))).0.0</AssemblyVersion>
  </PropertyGroup>

  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
    <SignAssembly>true</SignAssembly>
    <AssemblyOriginatorKeyFile>$(SolutionDir)$(SolutionName).snk</AssemblyOriginatorKeyFile>
  </PropertyGroup>

  <PropertyGroup Condition="$(GeneratePackageOnBuild)">
    <IncludeSymbols>True</IncludeSymbols>
    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
  </PropertyGroup>

  <Target Name="BasePathMapOnSourceRevision" BeforeTargets="BeforeBuild" DependsOnTargets="InitializeSourceControlInformation" Condition=" '$(Configuration)' == 'Release' ">
    <PropertyGroup Condition=" '$(SourceRevisionId)' != '' ">
      <PathMap>$(SolutionDir)=$(SolutionName)\$(SourceRevisionId)</PathMap>
    </PropertyGroup>
  </Target>

  <Target Name="PostPackNuGetPush" AfterTargets="Pack" Condition="$(GeneratePackageOnBuild)">
    <Exec Command="IF EXIST &quot;$(SolutionDir)&quot; COPY /Y &quot;$(OutputPath)$(PackageId).$(PackageVersion).*nupkg&quot; &quot;$(SolutionDir)&quot;" />
  </Target>

</Project>

GitBuildProps.targets

<!--
Based on: https://gist.github.com/jonathanduke/ab4fc1880e8b245d3f939b122f301938#file-gitbuildprops-targets
Public domain: http://unlicense.org/
Modify as you wish, but you are encouraged to leave this comment for future reference in case the original is updated.
-->
<Project>
  
  <Target Name="SetSourceRevisionId" BeforeTargets="InitializeSourceControlInformation" Condition=" '$(SourceRevisionId)' == '' And '$(Configuration)' == 'Release' ">
    <Exec Command="git describe --long --always --dirty --exclude=*" EchoOff="true" StandardOutputImportance="low" ConsoleToMSBuild="true">
      <Output TaskParameter="ConsoleOutput" PropertyName="SourceRevisionId" />
    </Exec>
  </Target>

</Project>

Packaging.cs

/*
Based on: https://gist.github.com/jonathanduke/ab4fc1880e8b245d3f939b122f301938#file-packaging-cs
Public domain: http://unlicense.org/
Modify as you wish, but you are encouraged to leave this comment for future reference in case the original is updated.
*/
using System;
using System.Diagnostics;
using System.IO;
using System.Reflection;

public class Packaging
{
    public static void Main(string[] args)
    {
        if (args.Length > 1)
        {
            var nugetPath = new FileInfo(args[0]).FullName;
            var nuspec = new FileInfo(args[1]).FullName;
            var repoPath = new FileInfo(args[2]).FullName;

            if (File.Exists(nugetPath) && File.Exists(nuspec) && Directory.Exists(repoPath))
            {
                var assembly = typeof(Packaging).Assembly;
                var version = assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion.Split('+')[0];
                var authors = assembly.GetCustomAttribute<AssemblyCompanyAttribute>()?.Company;
                var copyright = assembly.GetCustomAttribute<AssemblyCopyrightAttribute>()?.Copyright;

                var process = Process.Start(new ProcessStartInfo(nugetPath)
                {
                    Arguments = $@"pack ""{nuspec}"" -NoPackageAnalysis -OutputDirectory ""{repoPath}"" -Properties version=""{version}"";author=""{authors}"";copyright=""{copyright}""",
                    CreateNoWindow = true,
                    UseShellExecute = false,
                    RedirectStandardError = true,
                    RedirectStandardOutput = true
                });

                process.OutputDataReceived += (sender, e) => { if (!string.IsNullOrWhiteSpace(e.Data)) Console.WriteLine(e.Data); };
                process.BeginOutputReadLine();
                process.ErrorDataReceived += (sender, e) => { if (!string.IsNullOrWhiteSpace(e.Data)) Console.Error.WriteLine(e.Data); };
                process.BeginErrorReadLine();
                process.WaitForExit();
            }
        }
    }
}

Packaging.csproj

<!--
Based on: https://gist.github.com/jonathanduke/ab4fc1880e8b245d3f939b122f301938#file-packaging-csproj
Dependent on: https://gist.github.com/jonathanduke/ab4fc1880e8b245d3f939b122f301938#file-packaging-cs
Public domain: http://unlicense.org/
Modify as you wish, but you are encouraged to leave this comment for future reference in case the original is updated.
-->
<Project>

  <Import Sdk="Microsoft.NET.Sdk" Project="Sdk.props" />

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net45</TargetFramework>
    <NuGetCommandLineVersion Condition=" '$(NuGetCommandLineVersion)' == '' ">5.10.0</NuGetCommandLineVersion>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="NuGet.CommandLine" Version="$(NuGetCommandLineVersion)">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
  </ItemGroup>

  <Import Sdk="Microsoft.NET.Sdk" Project="Sdk.targets" />

  <!--
  The following configuration makes sure that the program executes during each release build, even if no changes are detected.
  -->

  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
    <PostBuildEvent>"$(TargetPath)" "$(NuGetPackageRoot)\nuget.commandline\$(NuGetCommandLineVersion)\tools\NuGet.exe" "$(SolutionDir)\Website\package.nuspec" "$(SolutionDir)"</PostBuildEvent>
    <RunPostBuildEvent>OnBuildSuccess</RunPostBuildEvent>
    <GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute>
  </PropertyGroup>

  <Target Name="CreateBuildAssemblyInfo" BeforeTargets="BeforeCompile" Condition="'$(Configuration)' == 'Release'">
    <ItemGroup>
      <BuildAssemblyAttributes Include="AssemblyFileVersion">
        <_Parameter1>$(VersionPrefix.Substring(0,$(VersionPrefix.LastIndexOf('.')))).$([System.String]::Format("{0:%d}.{1:0}",$([System.DateTime]::Now.Subtract($([System.DateTime]::Parse("2000-01-01")))),$([MSBuild]::Divide($([System.DateTime]::Now.TimeOfDay.TotalSeconds),2))))</_Parameter1>
      </BuildAssemblyAttributes>
    </ItemGroup>
    <WriteCodeFragment Language="C#" OutputDirectory="$(IntermediateOutputPath)" OutputFile="BuildAssemblyInfo.g.cs" AssemblyAttributes="@(BuildAssemblyAttributes)">
      <Output TaskParameter="OutputFile" ItemName="Compile" />
      <Output TaskParameter="OutputFile" ItemName="FileWrites" />
    </WriteCodeFragment>
  </Target>

</Project>