format.yml

name: Check code formatting

on:
  push:
    branches:
      - main
    paths:
      - ".github/workflows/format.yml"
      - "**.rs"
      - "**/Cargo.toml"
      - "**/Cargo.lock"
  pull_request:
    branches:
      - main
    paths:
      - ".github/workflows/format.yml"
      - "**.rs"
      - "**/Cargo.toml"
      - "**/Cargo.lock"

jobs:
  format:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: ${{ matrix.target }}

      - uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/bin/
            ~/.cargo/registry/index/
            ~/.cargo/registry/cache/
            ~/.cargo/git/db/
            target/
          key: format-${{ runner.os }}-cargo-${{ matrix.target }}-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            format-${{ runner.os }}-cargo-${{ matrix.target }}-
            ${{ runner.os }}-cargo-${{ matrix.target }}-

      # ----- Actual linting logic ------
      # These lines should mirror the `just lint` command.
      - name: cargo fmt
        run: cargo fmt --all -- --check