clang-format is a tool to reformat C/C++ to the right coding style.

Run Locally

The mozlint integration of clang-format can be run using mach:

$ mach lint --linter clang-format <file paths>


To enable clang-format on new directory, add the path to the include section in the clang-format.yml file.

While excludes: will work, this linter will read the ignore list from .clang-format-ignore file at the root directory. This because it is also used by the ./mach clang-format -p command.


clang-format can reformat the code with the option –fix (based on the upstream option -i). To highlight the results, we are using the --dry-run option (from clang-format 10).