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path: root/.github/workflows/ci.yaml
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name: ci
on:
  pull_request:
  push:
    branches:
      - main
  workflow_dispatch:
jobs:
  get-msrv:
    name: Get declared MSRV from Cargo.toml
    runs-on: ubuntu-latest
    outputs:
      msrv: ${{ steps.get_msrv.outputs.msrv }}
    steps:
      - name: Install ripgrep
        run: sudo apt-get install -y ripgrep

      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Get MSRV
        id: get_msrv
        run: rg '^\s*rust-version\s*=\s*"(\d+(\.\d+){0,2})"' --replace 'msrv=$1' Cargo.toml >> "$GITHUB_OUTPUT"

  check-fmt:
    name: Check code formatting
    runs-on: ubuntu-latest
    needs: get-msrv
    strategy:
      fail-fast: false
      matrix:
        rust:
          - ${{ needs.get-msrv.outputs.msrv }}
          - stable
          - nightly
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Install Rust
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.rust }}
          components: rustfmt
      
      - name: Check formatting
        run: cargo fmt --all -- --check

  test:
    name: Test on each target
    needs: get-msrv
    env:
      # Emit backtraces on panics.
      RUST_BACKTRACE: 1
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        build:
          - android-aarch64
          - linux-x64-gnu
          - linux-x64-musl
          - macos-x64
          - windows-x64-msvc
        rust:
          - ${{ needs.get-msrv.outputs.msrv }}
          - stable
          - nightly
        include:
          - os: ubuntu-latest # default
          - cargo: cargo # default; overwrite with `cross` if necessary
          - build: android-aarch64
            target: aarch64-linux-android
            cargo: cross
          - build: linux-x64-gnu
            target: x86_64-unknown-linux-gnu
          - build: linux-x64-musl
            target: x86_64-unknown-linux-musl
          - build: macos-x64
            os: macos-latest
            target: x86_64-apple-darwin
          - build: windows-x64-msvc
            os: windows-latest
            target: x86_64-pc-windows-msvc
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Install Rust
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.rust }}
          targets: ${{ matrix.target }}
          components: clippy

      - name: Install cross
        if: matrix.cargo == 'cross'
        # The latest realese of `cross` is not able to build/link for `aarch64-linux-android`
        # See: https://github.com/cross-rs/cross/issues/1222
        # This is fixed on `main` but not yet released. To avoid a breakage somewhen in the future
        # pin the cross revision used to the latest HEAD at 04/2024. 
        # Go back to taiki-e/install-action once cross 0.3 is released.
        uses: taiki-e/cache-cargo-install-action@v1
        with:
          tool: cross
          git: https://github.com/cross-rs/cross.git
          rev: 085092c

      - name: Build
        id: build
        run: ${{ matrix.cargo }} build --verbose --target ${{ matrix.target }}

      # This is useful for debugging problems when the expected build artifacts
      # (like shell completions and man pages) aren't generated.
      - name: Show build.rs stderr
        shell: bash
        run: |
          # it's probably okay to assume no spaces?
          STDERR_FILES=$(find "./target/debug" -name stderr | grep bandwhich || true)
          for FILE in $STDERR_FILES; do
            echo "::group::$FILE"
            cat "$FILE"
            echo "::endgroup::"
          done

      - name: Run clippy
        run: ${{ matrix.cargo }} clippy --all-targets --all-features --target ${{ matrix.target }} -- -D warnings

      - name: Install npcap on Windows
        # PRs from other repositories cannot be trusted with repository secrets
        if: matrix.os == 'windows-latest' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository)
        env:
          NPCAP_OEM_URL: ${{ secrets.NPCAP_OEM_URL }}
        run: |
          Invoke-WebRequest -Uri "$env:NPCAP_OEM_URL" -OutFile "$env:TEMP/npcap-oem.exe"
          # for this ridiculous `&` syntax alone, I'd rather use COBOL than Powershell
          # see https://stackoverflow.com/a/1674950/5637701
          & "$env:TEMP/npcap-oem.exe" /S

      - name: Run tests
        id: run_tests
        # npcap is needed to run tests on Windows, so unfortunately we cannot run tests
        # on PRs from other repositories
        if: matrix.os != 'windows-latest' || github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
        env:
          # make insta generate new snapshots in CI
          INSTA_UPDATE: new
        run: ${{ matrix.cargo }} test --all-targets --all-features --target ${{ matrix.target }}

      - name: Upload snapshots of failed tests
        if: ${{ failure() && steps.run_tests.outcome == 'failure' }}
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.os }}-${{ matrix.rust }}-failed_snapshots
          path: '**/*.snap.new'

      - name: Upload binaries
        if: ${{ success() || steps.build.outcome == 'success' }}
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.target }}-${{ matrix.rust }}
          path: |
            target/${{ matrix.target }}/debug/bandwhich
            target/${{ matrix.target }}/debug/bandwhich.exe
            target/${{ matrix.target }}/debug/bandwhich.pdb