name: "Lint (rust)"

on:
    # Run on every pull request (open or push to it) that changes rust/
    pull_request:
        paths:
            - "rust/**"
            - ".github/workflows/rust-lint.yml"

permissions:
    contents: read

# Cancel in-progress lint runs when a new commit is pushed.
concurrency:
    group: ${{ github.workflow }}-${{ github.ref }}
    cancel-in-progress: true

env:
    RUSTFLAGS: -D warnings

jobs:
    lint:
        runs-on: ubuntu-latest
        defaults:
            run:
                working-directory: rust
        steps:
            - name: Checkout code
              uses: actions/checkout@v4

            - name: Cache
              uses: actions/cache@v4
              with:
                  path: |
                      ~/.cargo/registry
                      ~/.cargo/git
                      target
                  key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}

            - run: cargo fmt --check

            - run: cargo clippy --all-targets --all-features

            - run: cargo build