Source Generators

[otac0n]

Added source generator support with backwards compatibility. Fixes #14.

You can opt-out of source generation using:

  <UseSourceGeneration>false</UseSourceGeneration>

Or, if you were previously specifying an output path, source generation will be off by default.

[otac0n]

Blocking issues:

• New tests project build fails to load either the MSBuild task (using dotnet build) or the Source Generator (using Visual Studio), although the NuGet package was tested to work.
  • Temporarily disabled these tests. Source Generation Debug Launch Profile can reference non-netstandard2.0 versions of a multi-targeted library. dotnet/roslyn-sdk#1128
• The dependency on System.IO.Abstractions caused a bump to net461, but the payoff has been minimal. It seems not totally worth it to abstract over the filesystem when the only class touching it was the CompileManager. Instead, I think we should roll that back and opt to conditionally compile some static methods.
  • Done
• The analyzer warning RS1035 has been disabled.
  • Temporary in-source suppressions. PreferredUILang is not accessible from Incremental Generators dotnet/roslyn#71094
• Build error for consuming projects with no WeaveTemplate items.
  • Fixed
• Untested on Linux
  • Integration Tests red-green on Ubuntu
• WeaveAssemblyPath is exposed, but better would be to keep it private.
  • Fixed

Non-blocking issues:

• Double-click on error behavior is not improved, still doesn't take you to the file. This is despite fixing source link issues with relative paths.
• MSBuild Item namespace now includes WeaveTemplateGenerate and WeaveTemplateCompile. I'm considering anything prefixed with WeaveTemplate to be reserved for Weave.

[otac0n]

Failing PR builds here are due to: GitTools/GitVersion#3718