# How to include commit URL in nuget package description

It's quite helpful to include a [direct link to the source code](https://www.nuget.org/packages/Microsoft.AspnetCore.Authorization) that produced a given package version, so your users can quickly see what's included (i.e. they may be tracking a bug fix).

If you are using [Microsoft.SourceLink](https://www.nuget.org/packages?q=Microsoft.SourceLink), you already have all the information you need automatically populated for you. The following target will update the description just before the nuget is produced:

```markup
  <Target Name="UpdatePackageMetadata" 
          BeforeTargets="PrepareForBuild;GetAssemblyVersion;GenerateNuspec;Pack"
          Condition="'$(RepositoryUrl)' != '' And '$(SourceRevisionId)' != ''">
    <PropertyGroup>
      <Description>
        $(Description)

        Built from $(RepositoryUrl)/tree/$(SourceRevisionId.Substring(0, 9))
      </Description>
      <!-- Update nuspec properties too -->
      <PackageProjectUrl>$(RepositoryUrl)</PackageProjectUrl>
      <PackageDescription> $(Description)</PackageDescription>
    </PropertyGroup>
  </Target>
```

This will result in a short-ish link (we trim it to 9 chars, which is the common short sha in Git) to the repo, similar to many [ASP.NET Core](https://www.nuget.org/packages/Microsoft.AspNetCore.Http/) [packages](https://www.nuget.org/packages/Microsoft.AspNetCore.Mvc.Core/).

If you're using [GitInfo](https://www.nuget.org/packages/GitInfo/) instead, you'll have to populate the `RepositoryUrl` yourself, and replace `SourceRevisionId` with `GitSha`.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://til.cazzulino.com/msbuild/how-to-include-commit-url-in-nuget-package-description.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.