Add SourceGenerator and Analyzer templates

[ryzngard]

This adds templates to the sdk that can be used with dotnet new to create new projects for each of these.

Proposed naming:

dotnet new sourcegen => new c# source generator dotnet new analyzer => new c# analyzer

TODO:

• [x] Package templates
• [ ] Choose correct author
• [ ] Finalize template contents
• [x] Add packaging project (for both?)
• [ ] Add test project (for both)

[ryzngard]

This is pretty basic outlines, but I wanted to get the work going to add these. @davidwengier I think you had a better template for source generators?

@sharwell and @mavasani is there anything missing in the analyzer?

[sharwell]

is there anything missing in the analyzer?

The analyzer template appears to be missing at least:

• Packaging project
• Test project
• NuGet.config

[ryzngard]

is there anything missing in the analyzer?

The analyzer template appears to be missing at least:

• Packaging project
• Test project
• NuGet.config

Adding the two projects to the todo list at top. What is the NuGet.config for?

[sharwell]

What is the NuGet.config for?

The test library updates are published to the dotnet-tools feed, not NuGet. When you add the test project to the template, it will only restore properly if the NuGet feed is defined.

[peteraritchie]

Does this need someone to take it to the finish line?

[ryzngard]

Likely this won't be the final template. Instead I believe @jmarolf had some ideas...

Happy to pick this back up, but it looked like more work was needed to decide what the template should actually contain.

[jmarolf]

@ryzngard should we close this PR out?

[ryzngard]

@jmarolf do you mean abandon, or update and try to get this in with current plan?

[WeihanLi]

Any update for this