ci-rs.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"
  HUGR_TEST_SCHEMA: "1"

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 in Rust files
    runs-on: ubuntu-latest
    # Required permissions
    permissions:
      pull-requests: read
    # Set job outputs to values from filter step
    outputs:
      rust: ${{ github.ref_name == github.event.repository.default_branch || steps.filter.outputs.rust }}
    steps:
    - uses: actions/checkout@v4
    - uses: dorny/paths-filter@v3
      id: filter
      with:
        filters: .github/change-filters.yml

  check:
    needs: changes
    if: ${{ needs.changes.outputs.rust == 'true' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.6
      - 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"

  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@v0.0.6
      - 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-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@v0.0.6
      - 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-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@v0.0.6
      - 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
      - name: Build HUGR binary
        run: cargo build -p hugr-cli
      - name: Upload the binary to the artifacts
        uses: actions/upload-artifact@v4
        with:
          name: hugr_binary
          path: target/debug/hugr

  # Run tests on other toolchains
  tests-other:
    needs: changes
    if: ${{ needs.changes.outputs.rust == 'true' && github.event_name != 'merge_group' }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: true
      matrix:
        # Stable is covered by `tests-stable-no-features` and `tests-stable-all-features`
        # Nightly is covered by `tests-nightly-coverage`
        rust: ['1.75', beta]
    name: tests (Rust ${{ matrix.rust }})
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.6
      - 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

  # Ensure that serialized extensions match rust implementation
  std-extensions:
    needs: [changes, tests-stable-all-features]
    if: ${{ needs.changes.outputs.rust == 'true' && github.event_name != 'merge_group' }}
    name: Check standard extensions
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Download the hugr binary
        uses: actions/download-artifact@v4
        with:
          name: hugr_binary
          path: ${{ github.workspace }}/target/debug
      - name: Generate the updated definitions
        run: |
          chmod +x target/debug/hugr
          ./target/debug/hugr gen-extensions -o specification/std_extensions
      - name: Check if the declarations are up to date
        run: |
          git diff --exit-code --name-only specification/std_extensions/
          if [ $? -ne 0 ]; then
            echo "The serialized standard extensions are not up to date"
            echo "Please run 'just gen-extensions' and commit the changes"
            exit 1
          fi

  tests-nightly-coverage:
    needs: changes
    # Run only if there are changes in the relevant files
    if: ${{ needs.changes.outputs.rust == 'true' && github.event_name != 'merge_group' }}
    runs-on: ubuntu-latest
    name: tests (Rust nightly, coverage)
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.6
      - uses: dtolnay/rust-toolchain@master
        with:
          # Nightly is required to count doctests coverage
          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 }}

  # 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, tests-stable-no-features, tests-stable-all-features, std-extensions]
    if: ${{ !cancelled() }}
    runs-on: ubuntu-latest
    steps:
      - 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.result == 'failure' || needs.check.result == 'cancelled' ||
          needs.tests-stable-no-features.result == 'failure' || needs.tests-stable-no-features.result == 'cancelled' ||
          needs.tests-stable-all-features.result == 'failure' || needs.tests-stable-all-features.result == 'cancelled' ||
          needs.std-extensions.result == 'failure' || needs.std-extensions.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"