Rust rustfmt-check Action

This action runs cargo fmt and creates annotations to PR.

Caveats

This action uses cargo fmt --message-format=json to get the list of files to check, and it requires nightly toolchain.

Example workflow

format:
    name: rustfmt
    runs-on: ubuntu-latest
    steps:
        - uses: actions/checkout@v2
        - run: echo "date=$(date -d '1 month ago' +'%Y-%m-%d')" >> $GITHUB_ENV
        - uses: dtolnay/rust-toolchain@master
          with:
              toolchain: nightly-${{ env.date }}
              components: rustfmt
        - uses: LoliGothick/rustfmt-check@master
          with:
              token: ${{ secrets.GITHUB_TOKEN }}
              toolchain: nightly-${{ env.date }}
              flags: --all
              options: --manifest-path=Cargo.toml
              args: --config-path=path/to/rustfmt.toml
              working-directory: my_crate

Inputs

Name	Required	Description	Type	Default
token	✔	GitHub secret token, usually a ${{ secrets.GITHUB_TOKEN }}.	string
toolchain		Rust toolchain to use. Use this if you want to use specific version of nightly toolchain.	string	nightly
flags		Flags for the cargo fmt command. --message-format=json is set by default. --message-format and --check are omitted silently.	string	--message-format=json
options		Options for the cargo fmt command.	string
args		Options for the rustfmt command. --check is omitted silently.	string
name		Name of the created GitHub check. If running this action multiple times, each run must have a unique name.	string	rustfmt
working-directory		The working directory in which carg fmt is executed.	string	.