A few Google employees have recently upstreamed the `fix` Mercurial extension. From the help output for the extension: "Provides a command that runs configured tools on the contents of modified files, writing back any fixes to the working copy or replacing changesets." You can run `hg --config extensions.fix= help -e fix --verbose` on Mercurial 4.7+ for more details. I think it would be cool if configwizard would check for valid Mercurial versions and set up `hg fix` to work against our static analysis/linters if the extension is supported. The output of `./mach lint --list` shows we have some support for: - 'cpp-virtual-final' - 'shellcheck' - 'py3' - 'test-disable' - 'py2' - 'eslint' - 'codespell' - 'wpt' - 'yaml' - 'mingw-capitalization' - 'flake8' I believe we also use clang-format and rustfmt to varying degrees across the codebase.

Bug 1188202 is tracking rewriting the Firefox repo with clang-format to use Google's style convention.