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@v0.0.4
      - name: Install stable toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt, clippy
      - name: install-llvm
        run: "sudo apt-get update && sudo apt-get install -y llvm-14"
      - name: Check formatting
        run: cargo fmt -- --check
      - name: Run clippy
        run: cargo clippy --all-targets --workspace -- -D warnings
      - name: Build docs
        run: cargo doc --no-deps --workspace
        env:
          RUSTDOCFLAGS: "-Dwarnings"


  benches:
    name: Build benchmarks 🏋️
    needs: changes
    # if: ${{ needs.changes.outputs.rust == 'true' && github.event_name != 'merge_group' }}
    if: false # TODO
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: mozilla-actions/sccache-action@v0.0.4
      - 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

  # # 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@v0.0.4
  #     - name: install-llvm
  #       run: "sudo apt-get update && sudo apt-get install -y llvm-14"
  #     - 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@v0.0.4
      - name: install-llvm
        run: "sudo apt-get update && sudo apt-get install -y llvm-14"
      - 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 --no-run
      - name: Tests with all features
        run: cargo test --verbose --workspace

  # 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:
        # 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@v0.0.4
      - name: install-llvm
        run: "sudo apt-get update && sudo apt-get install -y llvm-14"
      - 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 all features
        run: cargo test --verbose --workspace --no-run
      - name: Tests with all features
        run: cargo test --verbose --workspace

  # 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]
    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

        # needs.tests-stable-no-features.result == 'failure' || needs.tests-stable-no-features.result == 'cancelled' ||
        if: |
          needs.changes.result == 'failure' || needs.changes.result == 'cancelled' ||
          needs.check.result == 'failure' || needs.check.result == 'cancelled' ||
          needs.tests-stable-all-features.result == 'failure' || needs.tests-stable-all-features.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"

  coverage:
    needs: [changes,
      # tests-stable-no-features,
      tests-stable-all-features, tests-other, check]
    # 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@v0.0.4
      - uses: dtolnay/rust-toolchain@master
        with:
          # Nightly is required to count doctests coverage
          #
          # Pinned nightly version until this gets resolved
          # https://github.com/rust-lang/rust/issues/125474
          toolchain: 'nightly-2024-05-22'
          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 --doctests
      - name: Generate coverage report
        run: cargo llvm-cov 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 }}