Add DiagnosticDescriptorHelper to set HelpURI for generator / analyzer diagnostics

[ericstj]

Fixes #85181

Create a helper method that formats and sets the helpLink for DiagnosticDescriptors

See https://github.com/search?q=repo%3Adotnet%2Fruntime+%28%22new+DiagnosticDescriptor%28%22+OR+%22new+DiagnosticDescriptor+%28%22%29&type=code

Absent are those from

runtime/src/tools/illink/src/ILLink.RoslynAnalyzer/DiagnosticDescriptors.cs

Line 14 in 79b9707

return new DiagnosticDescriptor (diagnosticId.AsString (),

I wasn't sure if those are published at the same URL. Maybe those are all here: https://learn.microsoft.com/en-us/dotnet/core/deploying/trimming/trim-warnings/il2001 ? If so - perhaps we can just modify that existing helper class. Thoughts @mateoatr @vitek-karas?

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Issue Details

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Fixes #85181

Create a helper method that formats and sets the helpLink for DiagnosticDescriptors

See https://github.com/search?q=repo%3Adotnet%2Fruntime+%28%22new+DiagnosticDescriptor%28%22+OR+%22new+DiagnosticDescriptor+%28%22%29&type=code

Absent are those from

runtime/src/tools/illink/src/ILLink.RoslynAnalyzer/DiagnosticDescriptors.cs

Line 14 in 79b9707

return new DiagnosticDescriptor (diagnosticId.AsString (),

I wasn't sure if those are published at the same URL. Maybe those are all here: https://learn.microsoft.com/en-us/dotnet/core/deploying/trimming/trim-warnings ? If so - perhaps we can just modify that existing helper class. Thoughts @mateoatr @vitek-karas?

Author:	ericstj
Assignees:	-
Labels:	area-Meta
Milestone:	-

[ericstj]

If so - perhaps we can just modify that existing helper class. Thoughts @mateoatr @vitek-karas?

I took another look this morning and found that we could fix this. Please review @dotnet/illink

[sbomer]

Nice, thanks! Did you forget to commit GetHelpUri?

[sbomer]

Thank you, LGTM!

[ericstj]

Linker test failures are #90431