name: Coverage

on:
  pull_request:
    branches:
      - master
      - develop
    paths-ignore:
      - '.github/workflows/doc.yml'
      - '.github/workflows/fast.yml'
      - '.github/workflows/slow.yml'
      - 'doc/**'
      - 'examples/**'
      - '*.md'

env:
  B2_OPTS: -q -j2 warnings-as-errors=on
  GCC_VERSION: 13

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref }}
  cancel-in-progress: true

jobs:
  cov:
    runs-on: ubuntu-24.04
    steps:
    - uses: actions/checkout@v4
    - name: Fetch Boost superproject
      run: |
        cd ..
        git clone -b $GITHUB_BASE_REF --depth 5 https://github.com/boostorg/boost.git
        cd boost
        mv -f $GITHUB_WORKSPACE/* libs/histogram
        git submodule update --init --depth 5 tools/build tools/boostdep
        python tools/boostdep/depinst/depinst.py --git_args "--depth 5 --jobs 3" histogram
        mv -f * $GITHUB_WORKSPACE

    - name: Prepare b2
      run: ./bootstrap.sh

    - name: Test cxxstd=latest coverage=on
      run: |
        cd libs/histogram

        # don't compile examples in coverage build, coverage must come from tests alone
        ../../b2 $B2_OPTS toolset=gcc-${GCC_VERSION} cxxstd=latest coverage=on test//all

    - name: Process coverage data
      run: |
        cd libs/histogram
        GCOV=gcov-${GCC_VERSION} tools/cov.py

    - uses: coverallsapp/github-action@v2
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}
        path-to-lcov: libs/histogram/coverage.info