single-header.yml

name: CMake

on:
  push:
    branches: [ main, singleheader_merge ] # singleheader_merge branch used for modifications to the CI

jobs:
  build:
    name: "Create single-header release"
    runs-on: ubuntu-22.04

    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 100

    - name: Cache
      uses: actions/cache@v4
      env:
        cache-name: cache-fetchContent-cache
      with:
        path: ${{runner.workspace}}/build/_deps
        key: ${{ runner.os }}-gcc-Release-${{ hashFiles('CMakeLists.txt') }}-${{ hashFiles('cmake/Dependencies.cmake') }}

    - name: Install gcc-12
      run: |
        sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa # provides newer gcc 12.2.0 instead of 12.1.0
        sudo apt-get install -y gcc-12 g++-12
        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 110 --slave /usr/bin/g++ g++ /usr/bin/g++-12 --slave /usr/bin/gcov gcov /usr/bin/gcov-12

    - name: Configure CMake to fetch UT dependency
      shell: bash
      run: cmake -S . -B ./build -DCMAKE_BUILD_TYPE=Release

    - name: create single-header
      shell: bash
      run: |
        wget https://raw.githubusercontent.com/edlund/amalgamate/c91f07eea1133aa184f652b8f1398eaf03586208/amalgamate.py
        mkdir -p singleheader
        python3 amalgamate.py -c devtools/singleheader-config-graph.json -s . -v yes
        python3 amalgamate.py -c devtools/singleheader-config-bench.json -s bench/ -v yes

    - name: upload to branch # keeping history of single-header branch
      run: |
        git config --global user.name "single header generator"
        git config --global user.email "noreply@example.com"
        git add singleheader
        git fetch --depth=1 origin single-header:single-header
        git reset --soft origin/single-header
        git rev-parse HEAD@{1} > .git/MERGE_HEAD
        git commit -m "single-header of $(git rev-parse --short HEAD@{1})"
        git push origin HEAD:single-header