How to include assemblies from NuGet packages in a VSIX Installer?

Question

I'm working on creating a Visual Studio 2017 custom Check-In Policy extension. My current solution is structured as follows:

Note: I am taking advantage of the new NuGet PackageReference approach, which is why there is no packages.config file.

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I believe I have setup my VSIX manifest appropriately since everything works perfectly when I don't reference Microsoft.Net.Http (originally I was hard-coding in values instead of retrieving the values). I'm not sure why the Microsoft.TeamFoundationServer.ExtendedClient NuGet package being included doesn't cause any issues, whereas the Microsoft.Net.Http NuGet package does.

I looked at the debug folder to see what is being compiled and I see every assembly necessary being pulled in, however if I unpack the VSIX (I renamed it to *.zip and unzipped it), only the project assembly is included; the Nuget referenced assemblies are not packaged in the VSIX package.

I came across a few resources, but nothing seems to work:

• VSIX Package doesn't include referenced project's dependencies
• VSIX with Project Templates and NuGet Packages
• How to include a Nuget package in a Visual Studio Extension (vsix)
• VSIX extension - How can I ensure a referenced dll or assembly is included in the VSIX file?

Every single one of these questions/answers do not seem to address my specific problem.

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Update:

I believe it is possible that the tool used to generate the VSIX package does not support the new PackageReference feature of NuGet. If I utilize the older packages.config feature, everything works fine. I have put in a UserVoice Ticket to support the new NuGet feature.

Answer 1

For those poor guys like us who face this problem (nuget using PackageReference and VSIX dependencies), I found a workaround, inspired by this post: NuGet packages referenced via PackageReference don't include DLLs in VSIX that didn't fully worked for me (it was including the metadata-only version of the assembly, not the full assembly with code). For example, here, I reference 4 nuget packages manually:

<Target Name="IncludeNuGetPackageReferences" AfterTargets="GetVsixSourceItems">
  <ItemGroup>
    <VSIXSourceItem Include="@(ReferenceCopyLocalPaths)" Condition="'%(ReferenceCopyLocalPaths.NuGetPackageId)' == 'Microsoft.Win32.Registry'" />
    <VSIXSourceItem Include="@(ReferenceCopyLocalPaths)" Condition="'%(ReferenceCopyLocalPaths.NuGetPackageId)' == 'System.CodeDom'" />
    <VSIXSourceItem Include="@(ReferenceCopyLocalPaths)" Condition="'%(ReferenceCopyLocalPaths.NuGetPackageId)' == 'System.Configuration.ConfigurationManager'" />
    <VSIXSourceItem Include="@(ReferenceCopyLocalPaths)" Condition="'%(ReferenceCopyLocalPaths.NuGetPackageId)' == 'System.ServiceProcess.ServiceController'" />
  </ItemGroup>
</Target>

PS: Tested with Visual Studio 2017 from 15.5.4 to 15.7.3

Answer 2

I was able to successfully include NuGet packages in a template by performing the steps outlined in the following Microsoft tutorial: Packages in Visual Studio templates

SDKs that are installed using an MSI can install NuGet packages directly on the developer's machine. This makes them immediately available when a project or item template is used, rather than having to extract them during that time. ASP.NET templates use this approach.

I have seen others experiencing problems because of the NuGet packages they are using. For .NET Core, I have used Microsoft.Net.Http, although it does require Microsoft.BCL. Unless you are experiencing problems, I suggest leaving legacy systems as-is, especially since these namespaces seem to be moving targets.

It appears System.Net.Http is the correct choice, at least for .NET on the Windows platform. It is also worth nothing that this package has no external dependencies.

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EDIT: It appears this could be related to bugs with PackageReference itself. I see a similar documented bug described here.

Answer 3

The option that works for Visual Studio 2017 is NuGet packages referenced via PackageReference don't include DLLs in VSIX. However, use the version suggested by the author:

<Target Name="IncludePackageReferenceDependencies" AfterTargets="GetVsixSourceItems">
  <ItemGroup>
    <VSIXSourceItem Include="@(ReferencePath)" Condition="$([System.String]::new('%(ReferencePath.FusionName)').StartsWith('NuGet.VisualStudio'))" />
  </ItemGroup>
</Target>

Don't try the version suggested by Simon Mourier. That may have worked in VS 2015, but it doesn't work now. Also note that this solution is for the PackageReference version of NuGet. It may work for the packages.config, but I didn't have the patience to test it out.