name: Docs

on:
  # trigger deployment on every push to main branch
  push:
    paths:
      - "docs/**"
    branches:
      - master
  # trigger deployment manually
  workflow_dispatch:

jobs:
  docs:
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: docs/

    steps:
      - uses: actions/checkout@v2
        with:
          # fetch all commits to get last updated time or other git log info
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v1
        with:
          node-version: "16"

      - name: Cache dependencies
        uses: actions/cache@v2
        id: npm-cache
        with:
          path: |
            **/node_modules
          key: ${{ runner.os }}-npm-${{ hashFiles('**/package-lock.json') }}
          restore-keys: |
            ${{ runner.os }}-npm-

      - name: Install dependencies
        if: steps.npm-cache.outputs.cache-hit != 'true'
        run: npm install

      - name: Build VuePress site
        run: npm run build
        
      - name: Bundle CNAME with site dist
        run: cp CNAME .vuepress/dist

      - name: Deploy to GitHub Pages
        uses: crazy-max/ghaction-github-pages@v2
        with:
          # deploy to gh-pages branch
          target_branch: gh-pages
          # deploy the default output dir of VuePress
          build_dir: docs/.vuepress/dist
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}