update_docs.yml

name: Generate and deploy documentation on GH pages

# update on releases or when triggered manually(must have write access)
on:
  release:
    types: [published]
  workflow_dispatch:
jobs:
  update_docs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Setup repo
        run: | # do autotool's job for substitutes since we don't need a full build environement
          mkdir gen_docs
          sed 's/@abs_top_builddir@\/docs/gen_docs/g' docs/Doxyfile.in > gen_docs/Doxyfile
          sed -i 's/@abs_top_srcdir@/./g' gen_docs/Doxyfile
          # grab version number from configure.ac
          export VER="`awk '/AC_INIT/{getline;print}' configure.ac | cut -d "[" -f2 | cut -d "]" -f1`"
          sed -i "s/@PACKAGE_VERSION@/$VER/g" gen_docs/Doxyfile
      - name: Install and run doxygen
        run: |
          sudo apt -y install doxygen graphviz
          doxygen gen_docs/Doxyfile
      - name: Deploy
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./gen_docs/html