Python Lint

Koray08 · November 22, 2023, 1:07pm

Is there any way of creating a linter for python?

marijn · November 22, 2023, 4:00pm

You’d have to find some kind of Python linter that can run in the browser, wrap it to convert the diagnostics it outputs to the format CodeMirror expects, wrap it with linter, and use it as an extension.

vsh · July 13, 2024, 6:14pm

I faced this need while working on ViperIDE.
It turned out to be much easier than I anticipated, thanks to WebAssembly and the Ruff Python linter.

github.com

vshymanskyy/ViperIDE/blob/2182112f7b2da500ae03e7ea70866b1ac84c6689/src/editor.js#L203-L217


      
          const ruffLinter = linter((view) => {
            const doc = view.state.doc
            const res = ruffWorkspace.check(doc.toString())
          
            const diagnostics = []
            for (let d of res) {
              diagnostics.push({
                from: doc.line(d.location.row).from + d.location.column - 1,
                to:   doc.line(d.end_location.row).from + d.end_location.column - 1,
                severity: (d.message.indexOf('Error:') >= 0) ? 'error' : 'warning',
                message: d.code ? d.code + ': ' + d.message : d.message,
              })
            }
            return diagnostics
          })

Result: