name: CI

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:

  test:
    name: Test on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macOS-latest]

    steps:
      - uses: actions/checkout@v2.3.4
      - uses: actions-rs/toolchain@v1.0.7
        with:
          toolchain: nightly
          override: true
      - name: cargo fetch
        uses: actions-rs/cargo@v1
        with:
          command: fetch
      - name: Test (+nightly)
        uses: actions-rs/cargo@v1
        with:
          command: test
          args: --verbose --all
      - name: Build (+nightly)
        uses: actions-rs/cargo@v1
        with:
          command: build
          args: --verbose --release

  doctest-nightly:
    name: Doctests (+nightly)
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2.3.4
    # Because we use nightly features for building docs,
    # using --all-features will fail without nightly toolchain.
    - uses: actions-rs/toolchain@v1.0.7
      with:
        toolchain: nightly
        override: true
    - uses: actions-rs/cargo@v1
      with:
        command: test
        args: --all-features --all-targets

  clippy:
    name: Clippy (+nightly)
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2.3.4
      - uses: actions-rs/toolchain@v1.0.7
        with:
          toolchain: nightly
          components: clippy
          override: true
      - name: Run clippy
        uses: actions-rs/clippy-check@v1
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          args: --all-features --all-targets -- -D warnings

  coverage:
    name: Coverage (+nightly)
    # The large timeout is to accommodate nightly builds
    timeout-minutes: 45
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2.3.4
        with:
          persist-credentials: false

      - uses: actions-rs/toolchain@v1
        with:
          toolchain: nightly
          override: true
          profile: minimal
          components: llvm-tools-preview

      - name: Install rustfilt symbol demangler
        run: |
          cargo install rustfilt
      - name: Rerun tests for coverage
        env:
          RUSTFLAGS: -Zinstrument-coverage -C link-dead-code -C debuginfo=2
          LLVM_PROFILE_FILE: "${{ github.workspace }}/test.%p.profraw"
          ZEBRA_SKIP_NETWORK_TESTS: 1
          CARGO_INCREMENTAL: 0
        run: |
          cargo test
          cargo test --no-run --message-format=json | jq -r "select(.profile.test == true) | .filenames[]" | grep -v dSYM - > filenames.txt
      - name: Merge coverage data
        run: |
          $(rustc --print target-libdir)/../bin/llvm-profdata merge test.*.profraw -o test.profdata
      - name: Generate detailed html coverage report for github artifact
        run: |
          $(rustc --print target-libdir)/../bin/llvm-cov show -format=html -ignore-filename-regex=".*/.cargo/registry/.*" -ignore-filename-regex=".*/.cargo/git/.*" -ignore-filename-regex=".*/.rustup/.*" -Xdemangler=rustfilt -show-instantiations -output-dir=./coverage -instr-profile=./test.profdata $(printf -- "-object %s " $(cat filenames.txt))
      - uses: actions/upload-artifact@v2
        with:
          name: coverage
          path: ./coverage

      - name: Generate lcov coverage report for codecov
        run: |
          $(rustc --print target-libdir)/../bin/llvm-cov export -format=lcov -instr-profile=test.profdata $(printf -- "-object %s " $(cat filenames.txt)) > "lcov.info"
      - name: Upload coverage report to Codecov
        uses: codecov/codecov-action@v1.5.2