name: publish mkdocs to github pages

on:
  workflow_dispatch:
  push:
    branches:
      - unidata_20.3.2
    paths:
      - 'docs/**'
      - 'mkdocs.yml'

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      - name: Setup Python and mkdocs
        uses: actions/setup-python@v2
        with:
          python-version: '3.8'

      - name: Update pip
        run: |
          # install pip=>20.1 to use "pip cache dir"
          python3 -m pip install --upgrade pip

      - name: Create mkdocs_requirements.txt
        run: |
          echo "markdown==3.3.4" >> mkdocs_requirements.txt
          echo "mkdocs==1.3.0" >> mkdocs_requirements.txt
          echo "mkdocs-unidata" >> mkdocs_requirements.txt
          echo "fontawesome_markdown" >> mkdocs_requirements.txt

      - name: Get pip cache dir
        id: pip-cache
        run: echo "::set-output name=dir::$(pip cache dir)"

      - name: Cache dependencies
        uses: actions/cache@v1
        with:
          path: ${{ steps.pip-cache.outputs.dir }}
          key: ${{ runner.os }}-pip-${{ hashFiles('**/mkdocs_requirements.txt') }}
          restore-keys: |
            ${{ runner.os }}-pip-

      - name: Install python dependencies
        run: python3 -m pip install -r ./mkdocs_requirements.txt

      - run: mkdocs build

      - name: Deploy to gh-pages
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./site