cleanup.yaml

name: Clean up

on:
  # Enable "pull_request" for testing
  # pull_request:
  # daily jobs
  schedule:
    - cron: '0 0 * * *'

jobs:
  cleanup:
    name: Cleanup gh-pages
    runs-on: ubuntu-latest

    steps:
      - name: Checkout the gh-pages branch
        uses: actions/checkout@v3
        with:
          ref: gh-pages
          fetch-depth: 0

      - name: Install markdown tool
        run: |
          sudo apt-get update
          sudo apt-get install markdown

      - name: Cleanup, squash and push
        run: |
          # delete the documentation if the corresponding branch is deleted
          for dir in $(find seismo-learn -mindepth 2 -maxdepth 2); do
            # directory is "user/repository/branch"
            repo=$(dirname $dir)
            branch=$(basename $dir)
            # the "git ls-remote" command return nothing if a branch is not found
            if [[ ! $(git ls-remote --heads https://github.com/${repo} ${branch}) ]]; then
              echo "Deleting directory $dir..."
              rm -rvf $dir
            fi
          done

          # Make some changes
          touch .nojekyll

          # generate TOC
          echo "## List of sites for previewing changes in PR" > index.md
          for branch in $(find seismo-learn -mindepth 2 -maxdepth 2); do
            echo "- [$branch](https://seismo-learn.org/sitepreview/$branch)" >> index.md
          done
          # convert index.md to index.html
          markdown index.md > index.html
          rm -f index.md

          # Configure git to be the GitHub Actions account
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git config user.name "github-actions[bot]"
          # Commit changes
          git add -A .
          git status
          git commit --allow-empty -m "Commit changes"

          # Squash all commits into one
          git reset $(git commit-tree HEAD^{tree} -m "Autosquash all commits by scheduled jobs")

          # Push changes
          git push -fq origin gh-pages 2>&1 > /dev/null