name: doc

on: [push, pull_request]

permissions:
  contents: read

jobs:
  build:
    # Use Ubuntu 20.04 because doxygen 1.8.13 from Ubuntu 18.04 is broken.
    runs-on: ubuntu-20.04

    steps:
    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6

    - name: Add Ubuntu mirrors
      run: |
        # Github Actions caching proxy is at times unreliable
        # see https://github.com/actions/runner-images/issues/7048
        printf 'http://azure.archive.ubuntu.com/ubuntu\tpriority:1\n' | sudo tee /etc/apt/mirrors.txt
        curl http://mirrors.ubuntu.com/mirrors.txt | sudo tee --append /etc/apt/mirrors.txt
        sudo sed -i 's~http://azure.archive.ubuntu.com/ubuntu/~mirror+file:/etc/apt/mirrors.txt~' /etc/apt/sources.list

    - name: Create build environment
      run: |
        sudo apt update
        sudo apt install doxygen
        pip install mkdocs-material==9.5.25 mkdocstrings==0.25.1 mike==2.1.1
        cmake -E make_directory ${{runner.workspace}}/build
        # Workaround https://github.com/actions/checkout/issues/13:
        git config --global user.name "$(git --no-pager log --format=format:'%an' -n 1)"
        git config --global user.email "$(git --no-pager log --format=format:'%ae' -n 1)"

    - name: Build
      working-directory: ${{runner.workspace}}/build
      run: $GITHUB_WORKSPACE/support/mkdocs deploy dev

    - name: Deploy
      env:
        KEY: "${{secrets.KEY}}"
      if: env.KEY != '' && github.ref == 'refs/heads/master'
      working-directory: ${{runner.workspace}}/fmt/build/fmt.dev
      run: git push https://$KEY@github.com/fmtlib/fmt.dev.git