ci.yml

name: Continuous integration

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
  merge_group:
    types: [checks_requested]
  workflow_dispatch: {}

env:
  CARGO_TERM_COLOR: always
  CARGO_INCREMENTAL: 0
  RUSTFLAGS: "--cfg=ci_run"
  MIRIFLAGS: '-Zmiri-permissive-provenance' # Required due to warnings in bitvec 1.0.1
  CI: true # insta snapshots behave differently on ci
  SCCACHE_GHA_ENABLED: "true"
  RUSTC_WRAPPER: "sccache"

jobs:
  # Check if changes were made to the relevant files.
  # Always returns true if running on the default branch, to ensure all changes are throughly checked.
  changes:
    name: Check for changes
    runs-on: ubuntu-latest
    # Required permissions
    permissions:
      pull-requests: read
    # Set job outputs to values from filter step
    # These outputs are always true when running after a merge to main, or if the PR has a `run-ci-checks` label.
    outputs:
      rust: ${{ steps.filter.outputs.rust == 'true' || steps.override.outputs.out == 'true' }}
      python: ${{ steps.filter.outputs.python == 'true' || steps.override.outputs.out == 'true' }}
    steps:
    - uses: actions/checkout@v4
    - name: Override label
      id: override
      run: |
        echo "Labels: ${{ github.event.pull_request.labels.*.name }}"
        echo "Label contains run-ci-checks: ${{ contains( github.event.pull_request.labels.*.name, 'run-ci-checks') }}"
        if [ "${{ github.event_name == 'pull_request' && contains( github.event.pull_request.labels.*.name, 'run-ci-checks') }}" == "true" ]; then
          echo "Overriding due to label 'run-ci-checks'"
          echo "out=true" >> $GITHUB_OUTPUT
        elif [ "${{ github.ref_name == github.event.repository.default_branch }}" == "true" ]; then
          echo "Overriding due to running on the default branch"
          echo "out=true" >> $GITHUB_OUTPUT
        fi
    - uses: dorny/paths-filter@v3
      id: filter
      with:
        filters: .github/change-filters.yml

  check-rs:
    name: Check Rust code 🦀
    needs: changes
    if: ${{ needs.changes.outputs.rust == 'true' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.5
      - name: Install stable toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt, clippy
      - name: Check formatting
        run: cargo fmt -- --check
      - name: Run clippy
        run: cargo clippy --all-targets --all-features --workspace -- -D warnings
      - name: Build docs
        run: cargo doc --no-deps --all-features --workspace
        env:
          RUSTDOCFLAGS: "-Dwarnings"

  check-py:
    name: Check Python code 🐍
    needs: changes
    if: ${{ needs.changes.outputs.python == 'true' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.5
      - name: Install poetry
        run: pipx install poetry
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'
          cache: "poetry"
      - name: Install the project libraries
        # Note: We do not need to compile with maturin here,
        # as we are only checking the Python code.
        run: poetry install
      - name: Type check with mypy
        run: poetry run mypy .
      - name: Check formatting with ruff
        run: poetry run ruff format --check
      - name: Lint with ruff
        run: poetry run ruff check

  benches:
    name: Build benchmarks 🏋️
    needs: changes
    if: ${{ needs.changes.outputs.rust == 'true' && github.event_name != 'merge_group' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.5
      - name: Install stable toolchain
        uses: dtolnay/rust-toolchain@stable
      - name: Build benchmarks with no features
        run: cargo bench --verbose --no-run --workspace --no-default-features
      - name: Build benchmarks with all features
        run: cargo bench --verbose --no-run --workspace --all-features

  # Run tests on Rust stable
  tests-rs-stable-no-features:
    needs: changes
    if: ${{ needs.changes.outputs.rust == 'true' }}
    runs-on: ubuntu-latest
    name: tests (Rust stable, no features)
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.5
      - id: toolchain
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: 'stable'
      - name: Configure default rust toolchain
        run: rustup override set ${{steps.toolchain.outputs.name}}
      - name: Build with no features
        run: cargo test --verbose --workspace --no-default-features --no-run
      - name: Tests with no features
        run: cargo test --verbose --workspace --no-default-features

  # Run tests on Rust stable
  tests-rs-stable-all-features:
    needs: changes
    if: ${{ needs.changes.outputs.rust == 'true' }}
    runs-on: ubuntu-latest
    name: tests (Rust stable, all features)
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.5
      - id: toolchain
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: 'stable'
      - name: Configure default rust toolchain
        run: rustup override set ${{steps.toolchain.outputs.name}}
      - name: Build with all features
        run: cargo test --verbose --workspace --all-features --no-run
      - name: Tests with all features
        run: cargo test --verbose --workspace --all-features

  # Run tests on other toolchains
  tests-rs-other:
    needs: changes
    if: ${{ needs.changes.outputs.rust == 'true' && github.event_name != 'merge_group' }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: true
      matrix:
        # Pinned nightly version until this gets resolved:
        # https://github.com/rust-lang/rust/issues/125474
        rust: ['1.75', beta, 'nightly-2024-05-22']
    name: tests (Rust ${{ matrix.rust }})
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.5
      - id: toolchain
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.rust }}
      - name: Configure default rust toolchain
        run: rustup override set ${{steps.toolchain.outputs.name}}
      - name: Build with no features
        run: cargo test --verbose --workspace --no-default-features --no-run
      - name: Tests with no features
        run: cargo test --verbose --workspace --no-default-features
      - name: Build with all features
        run: cargo test --verbose --workspace --all-features --no-run
      - name: Tests with all features
        run: cargo test --verbose --workspace --all-features

  tests-py:
    needs: changes
    if: ${{ needs.changes.outputs.python == 'true' }}
    runs-on: ubuntu-latest
    name: tests (Python)
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.5
      - name: Install stable toolchain
        uses: dtolnay/rust-toolchain@stable
      - name: Install poetry
        run: pipx install poetry
      - uses: actions/setup-python@v5
        with:
          python-version: '3.11'
          cache: 'poetry'
      - name: Build pyo3 bindings
        run: |
          poetry install
          poetry run maturin develop
      - name: Test pyo3 bindings
        run: poetry run pytest

  coverage-rs:
    name: Check Rust coverage 🦀
    needs: [changes, tests-rs-stable-no-features, tests-rs-stable-all-features, tests-rs-other, check-rs]
    # Run only if there are changes in the relevant files and the check job passed or was skipped
    if: always() && !failure() && !cancelled() && needs.changes.outputs.rust == 'true' && github.event_name != 'merge_group'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.5
      - uses: dtolnay/rust-toolchain@master
        with:
          toolchain: 'nightly'
          components: llvm-tools-preview
      - name: Install cargo-llvm-cov
        uses: taiki-e/install-action@cargo-llvm-cov
      - name: Run tests with coverage instrumentation
        run: |
            cargo llvm-cov clean --workspace
            cargo llvm-cov --no-report --workspace --no-default-features --doctests
            cargo llvm-cov --no-report --workspace --all-features --doctests
      - name: Generate coverage report
        run: cargo llvm-cov --all-features report --codecov --output-path coverage.json
      - name: Upload coverage to codecov.io
        uses: codecov/codecov-action@v4
        with:
          files: coverage.json
          name: rust
          flags: rust
          token: ${{ secrets.CODECOV_TOKEN }}

  coverage-py:
    name: Check Python coverage 🐍
    needs: [changes, tests-py, check-py]
    # Run only if there are changes in the relevant files and the check job passed or was skipped
    if: always() && !failure() && !cancelled() && needs.changes.outputs.python == 'true' && github.event_name != 'merge_group'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.5
      - name: Install stable toolchain
        uses: dtolnay/rust-toolchain@stable
      - name: Install poetry
        run: pipx install poetry
      - uses: actions/setup-python@v5
        with:
          python-version: '3.11'
          cache: 'poetry'
      - name: Build pyo3 bindings
        run: |
          poetry install
          poetry run maturin develop
      - name: Run python tests with coverage instrumentation
        run: poetry run pytest --cov=./ --cov-report=xml
      - name: Upload python coverage to codecov.io
        uses: codecov/codecov-action@v4
        with:
          files: coverage.xml
          name: python
          flags: python
          token: ${{ secrets.CODECOV_TOKEN }}

  # This is a meta job to mark successful completion of the required checks,
  # even if they are skipped due to no changes in the relevant files.
  required-checks:
    name: Required checks 🦀+🐍
    needs: [changes, check-rs, check-py, tests-rs-stable-no-features, tests-rs-stable-all-features, tests-py]
    if: ${{ !cancelled() }}
    runs-on: ubuntu-latest
    steps:
      - name: Debug changes step output
        run: |
          echo "Rust: ${{ needs.changes.outputs.rust }}"
          echo "Python: ${{ needs.changes.outputs.python }}"
      - name: Fail if required checks failed
        # This condition should simply be `if: failure() || cancelled()`,
        # but there seems to be a bug in the github workflow runner.
        #
        # See https://github.com/orgs/community/discussions/80788
        if: |
          needs.changes.result == 'failure' || needs.changes.result == 'cancelled' ||
          needs.check-rs.result == 'failure' || needs.check-rs.result == 'cancelled' ||
          needs.check-py.result == 'failure' || needs.check-py.result == 'cancelled' ||
          needs.tests-rs-stable-no-features.result == 'failure' || needs.tests-rs-stable-no-features.result == 'cancelled' ||
          needs.tests-rs-stable-all-features.result == 'failure' || needs.tests-rs-stable-all-features.result == 'cancelled' ||
          needs.tests-py.result == 'failure' || needs.tests-py.result == 'cancelled'
        run: |
          echo "Required checks failed"
          echo "Please check the logs for more information"
          exit 1
      - name: Pass if required checks passed
        run: |
          echo "All required checks passed"