name: ci
on:
  pull_request:
  push:
    branches:
      - main
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"

  test:
    name: test
    needs: get-msrv
    env:
      # Emit backtraces on panics.
      RUST_BACKTRACE: 1
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        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, clippy

      - name: Check formatting
        run: cargo fmt --all -- --check

      - name: Build
        run: cargo build --verbose

      # 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)
          for FILE in $STDERR_FILES; do
            echo "::group::$FILE"
            cat "$FILE"
            echo "::endgroup::"
          done

      - name: Run clippy
        run: cargo clippy --all-targets --all-features -- -D warnings

      - name: Install cargo-insta
        uses: taiki-e/install-action@v2
        with:
          tool: cargo-insta

      - name: Install npcap on Windows
        # PRs cannot not be trusted with repository secrets
        if: (matrix.os == 'windows-latest') && (github.event_name != 'pull_request')
        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 using cargo-insta
        id: run_tests
        # npcap is needed to run tests on Windows, so this is an unfortunate
        # sacrifice we have to make in the name of security
        if: (matrix.os != 'windows-latest') || (github.event_name != 'pull_request')
        run: cargo insta test

      - name: Upload snapshots of failed tests
        if: ${{ failure() && steps.run_tests.outcome == 'failure' }}
        uses: actions/upload-artifact@v3
        with:
          name: ${{ matrix.os }}-${{ matrix.rust }}-failed_snapshots
          path: src/tests/cases/snapshots/*.snap.new

      - name: Upload unix binary
        if: matrix.os != 'windows-latest'
        uses: actions/upload-artifact@v3
        with:
          name: ${{ matrix.os }}-${{ matrix.rust }}
          path: target/debug/bandwhich

      - name: Upload windows binary
        if: matrix.os == 'windows-latest'
        uses: actions/upload-artifact@v3
        with:
          name: ${{ matrix.os }}-${{ matrix.rust }}
          path: |
            target/debug/bandwhich.exe
            target/debug/bandwhich.pdb