deploy.yml

name: 'deploy github pages'

on:
  push:
    branches:
      - main
      - master
      - es[0-9]+
      - es[0-9]*.[0-9]*

jobs:
  deploy:
    name: 'deploy github pages'
    runs-on: ubuntu-latest
    if: ${{ github.repository == 'tc39/ecma402' }}

    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v2
        with:
          node-version: lts/*
          check-latest: true
      - run: npm install
      - run: npm run build-only
      - name: 'Require output size ≥ input size'
        run: du --bytes spec/ out/index.html | awk '{ print; if($1 < prev) exit 1; prev=$1 }'
      - name: 'Checkout gh-pages'
        uses: actions/checkout@v2
        with:
          ref: gh-pages
          path: gh-pages
      - name: 'Update gh-pages (draft)'
        id: update_draft
        if: ${{ github.ref_name == 'main' || github.ref_name == 'master' }}
        run: |
          find gh-pages -mindepth 1 -maxdepth 1 -regex '.*/[0-9]*$' -prune -o -exec rm -rf '{}' '+'
          cp -r out/* gh-pages/
      - name: 'Update gh-pages (snapshot)'
        if: ${{ steps.update_draft.outcome == 'skipped' }}
        run: |
          branch=${{ github.ref_name }}
          subdir=$(printf '%s' "$branch" | sed 's/^[^0-9]*//')
          rm -rf "gh-pages/$subdir" || true
          mkdir -p "gh-pages/$subdir"
          cp -r out/* "gh-pages/$subdir"
      - name: 'Deploy 🚀'
        uses: JamesIves/github-pages-deploy-action@4.0.0
        with:
          branch: gh-pages
          folder: gh-pages