name: CI

on:
  push:
    branches:
      - main
      # for bors r+
      - staging
      # for bors try
      - trying
  pull_request:
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref_name }}
  cancel-in-progress: true

env:
  CARGO_TERM_COLOR: always

jobs:
  fmt:
    if: github.ref != 'refs/heads/main'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v4
      - run: pip install nox
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt
      - name: Check python formatting (black)
        run: nox -s fmt-py
      - name: Check rust formatting (rustfmt)
        run: nox -s fmt-rust

  clippy:
    if: github.ref != 'refs/heads/main'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v4
      - run: pip install nox
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy
      - run: nox -s clippy

  check-target:
    needs: [fmt]
    runs-on: ubuntu-latest
    if: ${{ github.event_name != 'pull_request' && github.ref != 'refs/heads/main' }}
    strategy:
      # If one platform fails, allow the rest to keep testing if `CI-no-fail-fast` label is present
      fail-fast: ${{ !contains(github.event.pull_request.labels.*.name, 'CI-no-fail-fast') }}
      matrix:
        target: [powerpc64le-unknown-linux-gnu, s390x-unknown-linux-gnu, wasm32-wasi]
    name: check-${{ matrix.target }}
    steps:
      - uses: actions/checkout@v3
      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: ${{ matrix.target }}
      - name: Run cargo checks
        run: |
          set -x
          VERSIONS=("3.7" "3.8" "3.9" "3.10" "3.11")
          for VERSION in ${VERSIONS[@]}; do
            echo "version=$VERSION" > config.txt
            echo "suppress_build_script_link_lines=true" >> config.txt
            PYO3_BUILD_CONFIG=$(pwd)/config.txt cargo check --all-targets --no-default-features
            PYO3_BUILD_CONFIG=$(pwd)/config.txt cargo check --all-targets --no-default-features --features "abi3"
            PYO3_BUILD_CONFIG=$(pwd)/config.txt cargo check --all-targets --features "full multiple-pymethods"
            PYO3_BUILD_CONFIG=$(pwd)/config.txt cargo check --all-targets --features "abi3 full multiple-pymethods"
          done

  build-pr:
    if: github.event_name == 'pull_request'
    name: python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }} rust-${{ matrix.rust }}
    needs: [fmt] # don't wait for clippy as fails rarely and takes longer
    uses: ./.github/workflows/build.yml
    with:
      os: ${{ matrix.platform.os }}
      python-version: ${{ matrix.python-version }}
      python-architecture: ${{ matrix.platform.python-architecture }}
      rust: ${{ matrix.rust }}
      rust-target: ${{ matrix.platform.rust-target }}
      msrv: ${{ matrix.msrv }}
      extra-features: ${{ matrix.platform.extra-features }}
    secrets: inherit
    strategy:
      # If one platform fails, allow the rest to keep testing if `CI-no-fail-fast` label is present
      fail-fast: ${{ !contains(github.event.pull_request.labels.*.name, 'CI-no-fail-fast') }}
      matrix:
        extra-features: ["multiple-pymethods"]
        rust: [stable]
        # FIXME - pinned to 3.11.0 because 3.11.1 breaks CI on windows, see PyO3 issue 2817
        python-version: ["3.11.0"]
        platform:
          [
            {
              os: "macos-latest",
              python-architecture: "x64",
              rust-target: "x86_64-apple-darwin",
            },
            {
              os: "ubuntu-latest",
              python-architecture: "x64",
              rust-target: "x86_64-unknown-linux-gnu",
            },
            {
              os: "windows-latest",
              python-architecture: "x64",
              rust-target: "x86_64-pc-windows-msvc",
            },
          ]

  build-full:
    if: ${{ github.event_name != 'pull_request' && github.ref != 'refs/heads/main' }}
    name: python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }} rust-${{ matrix.rust }}
    needs: [fmt] # don't wait for clippy as fails rarely and takes longer
    uses: ./.github/workflows/build.yml
    with:
      os: ${{ matrix.platform.os }}
      python-version: ${{ matrix.python-version }}
      python-architecture: ${{ matrix.platform.python-architecture }}
      rust: ${{ matrix.rust }}
      rust-target: ${{ matrix.platform.rust-target }}
      msrv: ${{ matrix.msrv }}
      extra-features: ${{ matrix.platform.extra-features }}
    secrets: inherit
    strategy:
      # If one platform fails, allow the rest to keep testing if `CI-no-fail-fast` label is present
      fail-fast: ${{ !contains(github.event.pull_request.labels.*.name, 'CI-no-fail-fast') }}
      matrix:
        extra-features: ["multiple-pymethods"]  # Because MSRV doesn't support this
        rust: [stable]
        python-version: [
          "3.7",
          "3.8",
          "3.9",
          "3.10",
          # FIXME - pinned to 3.11.0 because 3.11.1 breaks CI on windows, see PyO3 issue 2817
          "3.11.0",
          "pypy-3.7",
          "pypy-3.8",
          "pypy-3.9"
        ]
        platform:
          [
            {
              os: "macos-latest",
              python-architecture: "x64",
              rust-target: "x86_64-apple-darwin",
            },
            {
              os: "ubuntu-latest",
              python-architecture: "x64",
              rust-target: "x86_64-unknown-linux-gnu",
            },
            {
              os: "windows-latest",
              python-architecture: "x64",
              rust-target: "x86_64-pc-windows-msvc",
            },
          ]
        include:
          # Test minimal supported Rust version
          - rust: 1.48.0
            python-version: "3.11"
            platform:
              {
                os: "ubuntu-latest",
                python-architecture: "x64",
                rust-target: "x86_64-unknown-linux-gnu",
              }
            msrv: "MSRV"
            extra-features: ""

          # Test the `nightly` feature
          - rust: nightly
            python-version: "3.11"
            platform:
              {
                os: "ubuntu-latest",
                python-architecture: "x64",
                rust-target: "x86_64-unknown-linux-gnu",
              }
            extra-features: "nightly multiple-pymethods"

          # Test 32-bit Windows only with the latest Python version
          - rust: stable
            # FIXME - pinned to 3.11.0 because 3.11.1 breaks CI on windows, see PyO3 issue 2817
            python-version: "3.11.0"
            platform:
              {
                os: "windows-latest",
                python-architecture: "x86",
                rust-target: "i686-pc-windows-msvc",
              }
            extra-features: "multiple-pymethods"

  valgrind:
    if: ${{ github.event_name != 'pull_request' && github.ref != 'refs/heads/main' }}
    needs: [fmt]
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v4
      - uses: Swatinem/rust-cache@v2
        with:
          key: cargo-valgrind
        continue-on-error: true
      # FIXME(adamreichold): Switch to stable when Valgrind understands DWARF5 as generated by LLVM 14,
      # c.f. https://bugs.kde.org/show_bug.cgi?id=452758#c35
      - uses: dtolnay/rust-toolchain@1.61.0
      - uses: taiki-e/install-action@valgrind
      - run: python -m pip install -U pip nox
      - run: nox -s test-rust -- release skip-full
    env:
      CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUNNER: valgrind --leak-check=no --error-exitcode=1
      RUST_BACKTRACE: 1
      TRYBUILD: overwrite

  careful:
    if: ${{ github.event_name != 'pull_request' && github.ref != 'refs/heads/main' }}
    needs: [fmt]
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v4
      - uses: Swatinem/rust-cache@v2
        with:
          key: cargo-careful
        continue-on-error: true
      - uses: dtolnay/rust-toolchain@nightly
        with:
          components: rust-src
      - run: cargo install cargo-careful
      - run: python -m pip install -U pip nox
      - run: nox -s test-rust -- careful skip-full
    env:
      RUST_BACKTRACE: 1
      TRYBUILD: overwrite

  coverage:
    needs: [fmt]
    name: coverage-${{ matrix.os }}
    strategy:
      matrix:
        os: ["windows", "macos", "ubuntu"]
    runs-on: ${{ matrix.os }}-latest
    steps:
      - if: ${{ github.event_name == 'pull_request' && matrix.os != 'ubuntu' }}
        id: should-skip
        shell: bash
        run: echo 'skip=true' >> $GITHUB_OUTPUT
      - uses: actions/checkout@v3
        if: steps.should-skip.outputs.skip != 'true'
      - uses: actions/setup-python@v4
        if: steps.should-skip.outputs.skip != 'true'
      - uses: Swatinem/rust-cache@v2
        if: steps.should-skip.outputs.skip != 'true'
        with:
          key: coverage-cargo-${{ matrix.os }}
        continue-on-error: true
      - uses: dtolnay/rust-toolchain@stable
        if: steps.should-skip.outputs.skip != 'true'
        with:
          components: llvm-tools-preview
      - name: Install cargo-llvm-cov
        if: steps.should-skip.outputs.skip != 'true'
        uses: taiki-e/install-action@cargo-llvm-cov
      - run: python -m pip install -U pip nox
        if: steps.should-skip.outputs.skip != 'true'
      - run: nox -s coverage
        if: steps.should-skip.outputs.skip != 'true'
      - uses: codecov/codecov-action@v3
        if: steps.should-skip.outputs.skip != 'true'
        with:
          file: coverage.lcov
          name: ${{ matrix.os }}

  emscripten:
    name: emscripten
    if: ${{ github.event_name != 'pull_request' && github.ref != 'refs/heads/main' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v4
        id: setup-python
      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: wasm32-unknown-emscripten
      - uses: actions/setup-node@v3
        with:
          node-version: 14
      - run: pip install nox
      - uses: actions/cache@v3
        id: cache
        with:
          path: |
            .nox/emscripten
          key: ${{ hashFiles('emscripten/*') }} - ${{ hashFiles('noxfile.py') }} - ${{ steps.setup-python.outputs.python-path }}
      - uses: Swatinem/rust-cache@v2
        with:
          key: cargo-emscripten-wasm32
      - name: Build
        if: steps.cache.outputs.cache-hit != 'true'
        run: nox -s build-emscripten
      - name: Test
        run: nox -s test-emscripten

  conclusion:
    needs:
      - fmt
      - clippy
      - check-target
      - build-pr
      - build-full
      - valgrind
      - careful
      - coverage
      - emscripten
    if: always()
    runs-on: ubuntu-latest
    steps:
      - name: Result
        run: |
          jq -C <<< "${needs}"
          # Check if all needs were successful or skipped.
          "$(jq -r 'all(.result as $result | (["success", "skipped"] | contains([$result])))' <<< "${needs}")"
        env:
          needs: ${{ toJson(needs) }}