How to resolve cairo lint issues (cairo-format) when vscode doesn't display anything

[threepwave]

I was regularly running into cairo formatting issues (e.g. File "contracts/settling_game/L07_Crypts.cairo" is incorrectly formatted) with no explanation of what was wrong in vscode.

To fix this, I used the 'Edit files inplace' feature of cairo-format which automagically fixed formatting issues for me 💪

find contracts -type f -name '*.cairo' | xargs cairo-format -i

[milancermak]

FWIW, every cairo-lang release comes with its own .vsix file. I'd recommend installing it. Unfortunately, one has to do so manually, there's not a published extension as far as I know.

Using the -i arg is correct. The lint workflow uses the -c, which just checks for correct formatting instead of replacing in place (since that doesn't make sense in CI).

There's now also a pre-commit hook for Cairo you could use, but it's not 100% perfect as the repo can/does lag behind the latest releases. Instead, if you have the latest cairo-lang installed locally, you can use this in the .pre-commit-config.yaml:

- repo: local
  hooks:
  - id: cairo-format
    name: cairo-format
    language: system
    entry: cairo-format -i
    files: \.cairo$