Product output for all files checked

Feature

An option to have mypy output something for every file checked, regardless of whether any errors are detected.

Pitch

See this comment: https://github.com/python/mypy/pull/9672#pullrequestreview-521147219

This would make implementing the VSCode mypy extension a lot easier - right now errors aren't cleared - it would be great if there was an option to have mypy list the files it checked as part of a request.

See this PR/Description for a clear example of where this would be useful: https://github.com/microsoft/vscode-mypy/pull/123#issuecomment-1683010037

Perhaps an output like:

file.py:29:5:39:64: info: file found

Open to any suggestions though

Inizia leggendo la revisione della pull request di mypy collegata e la descrizione dell’issue/PR di vscode-mypy per comprendere il contratto di output richiesto. Segui l’output diagnostico esistente di mypy e i punti di ingresso per il controllo dei file; il lavoro è completo quando una modalità opt-in segnala ogni file controllato, inclusi i file senza errori, così da poter cancellare gli errori dell’editor.