on: [push, pull_request]

name: Code coverage with grcov

jobs:
  grcov:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os:
          - ubuntu-latest
          - macOS-latest
          - windows-latest

    steps:
      - uses: actions/checkout@v2

      - name: Install toolchain
        uses: actions-rs/toolchain@v1
        with:
          toolchain: nightly
          override: true
          profile: minimal

      - name: Execute tests
        uses: actions-rs/cargo@v1
        with:
          command: test
          args: --all
        env:
          CARGO_INCREMENTAL: 0
          RUSTFLAGS: "-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests"

      # Note that `actions-rs/grcov` Action can install `grcov` too,
      # but can't use faster installation methods yet.
      # As a temporary experiment `actions-rs/install` Action plugged in here.
      # Consider **NOT** to copy that into your workflow,
      # but use `actions-rs/grcov` only
      - name: Pre-installing grcov
        uses: actions-rs/install@v0.1
        with:
          crate: grcov
          use-tool-cache: true

      - name: Gather coverage data
        id: coverage
        uses: actions-rs/grcov@v0.1
        with:
          coveralls-token: ${{ secrets.COVERALLS_TOKEN }}

      - name: Coveralls upload
        uses: coverallsapp/github-action@master
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          parallel: true
          path-to-lcov: ${{ steps.coverage.outputs.report }}

  grcov_finalize:
    runs-on: ubuntu-latest
    needs: grcov
    steps:
      - name: Coveralls finalization
        uses: coverallsapp/github-action@master
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          parallel-finished: true