How to add a GitHub action to run clang format at every push

Navigate to your project’s “Actions” tab and click “Set up a workflow yourself”. Set the file name to formatter.yml and paste the following code into the file:

on: push
name: clang-format Code Formatter
jobs:
  lint:
    name: clang-format Code Formatter
    runs-on: ubuntu-latest
    steps:
    - name: Clang Code Formatter
      uses: ivanludvig/clang-format-action@v1.4
      env:
        GITHUB_TOKEN: ${ { secrets.GITHUB_TOKEN } }

This will run an action that I setup in a repository. It will automatically format your code on every push.

How to change clang code style

My action uses Microsoft’s code style by default. But this can be easily changed. All you have to do is fork my repository and change one line of code in entrypoint.sh. This one:

clang-format -style=microsoft -i $SRC

You can set the style to a whole bunch of options: LLVM, Google, Chromium, Mozilla, WebKit, GNU. It’s up to you. Then, add your action to your repository the same way you added mine.

P.S. I don’t actually like Microsoft’s C++ formatting, but that’s what I had to use.