Enhance config linter

[anbraten]

Woodpecker should properly lint and evaluate the ci file/files and show errors with the specific position to users.

• return linter errors to UI wrap pipeline-config-lint error to tell the user it's one #460
• add way to let linter return warnings like deprecations / bad habits Warn users for bad-habits and deprecations in configs #922
• lint every pipeline config before executing with json schema (currently only some checks)
• add cli command to execute pipeline linter (currently only json schema check)
• add endpoint to be able to paste in config code and highlight the result in UI Expose schema linter to UI #892
• show json schema errors of executed pipelines in UI by highlighting the wrong part
• allow to lint using multiple workflow files (needed for Prevent workflow depends_on dead-lock #2685)

With #89 we could show the errors at their specific position in the config. Maybe somehow like:

[6543]

@anbraten would it help if we just add an endpoint, where you can send config in body and get lint error in return?

[anbraten]

There are a few things I had in mind:

• lint every pipeline config before executing with json schema (currently only some checks)
• show json schema errors of executed pipelines in UI by highlighting the wrong part
• add endpoint to be able to paste in config code and highlight the result in UI => Expose schema linter to UI #892
• add cli command to execute pipeline linter (currently only json schema check)
• add way to let linter return warnings like deprecations / bad habits Warn users for bad-habits and deprecations in configs #922

[x80486]

anbraten would it help if we just add an endpoint, where you can send config in body and get lint error in return?

I think along with some integration in the UI will do it. It's always great to double check the config before pushing any related changes.

[6543]

https://www.npmjs.com/package/jsonschema
or
https://www.npmjs.com/package/ajv
?