rust.yml

on: [push, pull_request]

name: Continuous integration

jobs:
  check:
    name: Check
    runs-on: ubuntu-latest
    steps:
      - name: Install Protoc
        uses: arduino/setup-protoc@v1
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          override: true

      # Install prometheus_client python library.
      - uses: actions/setup-python@v2
        with:
          python-version: '3.x'
      - run: pip3 install prometheus_client

      # Caching
      - name: Cache cargo registry
        uses: actions/cache@v1
        with:
          path: ~/.cargo/registry
          key: cargo-registry-${{ hashFiles('Cargo.toml') }}
      - name: Cache cargo index
        uses: actions/cache@v1
        with:
          path: ~/.cargo/git
          key: cargo-index-${{ hashFiles('Cargo.toml') }}

      - uses: actions-rs/cargo@v1
        with:
          command: check

      - uses: actions-rs/cargo@v1
        with:
          command: test
          args: --benches --all-features

  test:
    name: Test Suite
    runs-on: ubuntu-latest
    steps:
      - name: Install Protoc
        uses: arduino/setup-protoc@v1
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          override: true

      # Install prometheus_client python library.
      - uses: actions/setup-python@v2
        with:
          python-version: '3.x'
      - run: pip3 install prometheus_client

      # Caching
      - name: Cache cargo registry
        uses: actions/cache@v1
        with:
          path: ~/.cargo/registry
          key: cargo-registry-${{ hashFiles('Cargo.toml') }}
      - name: Cache cargo index
        uses: actions/cache@v1
        with:
          path: ~/.cargo/git
          key: cargo-index-${{ hashFiles('Cargo.toml') }}

      - uses: actions-rs/cargo@v1
        with:
          command: test
          args: --all --all-features

  fmt:
    name: Rustfmt
    runs-on: ubuntu-latest
    steps:
      - name: Install Protoc
        uses: arduino/setup-protoc@v1
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          override: true
      - run: rustup component add rustfmt
      - uses: actions-rs/cargo@v1
        with:
          command: fmt
          args: --all -- --check

  clippy:
    name: Clippy
    runs-on: ubuntu-latest
    steps:
      - name: Install Protoc
        uses: arduino/setup-protoc@v1
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          override: true
      - run: rustup component add clippy

      # Caching
      - name: Cache cargo registry
        uses: actions/cache@v1
        with:
          path: ~/.cargo/registry
          key: cargo-registry-${{ hashFiles('Cargo.toml') }}
      - name: Cache cargo index
        uses: actions/cache@v1
        with:
          path: ~/.cargo/git
          key: cargo-index-${{ hashFiles('Cargo.toml') }}

      - uses: actions-rs/cargo@v1
        with:
          command: clippy
          args: --workspace --all-targets -- -D warnings

  check-rustdoc-links:
    name: Check rustdoc intra-doc links
    runs-on: ubuntu-latest
    steps:
      - name: Install Protoc
        uses: arduino/setup-protoc@v1
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          override: true
      - uses: actions-rs/cargo@v1
        env:
          RUSTDOCFLAGS: "--deny broken_intra_doc_links"
        with:
          command: doc
          args: --verbose --workspace --no-deps --document-private-items --all-features

  cross-compile:
    name: Cross compile
    runs-on: ubuntu-latest
    strategy:
      matrix:
        target:
          - armv7-unknown-linux-gnueabihf
          - mipsel-unknown-linux-gnu
          - powerpc-unknown-linux-gnu
          - powerpc64-unknown-linux-gnu
          - wasm32-unknown-unknown
    steps:
      - uses: actions/checkout@v2

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

      # Note that this does not test the `protobuf` feature (for now). See reasoning in https://github.com/prometheus/client_rust/pull/98/.
      - run: cargo check --target=${{ matrix.target }}