www.yml

name: Build + Deploy to GitHub Pages
on:
  push:
    branches:
      - www
  workflow_call:
    inputs:
      ref:
        type: string
        default: main
        description: "The branch, tag, or SHA to run the workflow from"
  workflow_dispatch:
    inputs:
      ref:
        type: string
        default: main
        description: "The branch, tag, or SHA to run the workflow from"
jobs:
  run:
    name: Build + Deploy to GitHub Pages (iff www/ has changed since last gh-pages push)
    runs-on: ubuntu-latest
    steps:
      # See https://github.com/actions/checkout/issues/265#issuecomment-1936792528
      - name: Resolve inputs.ref to full SHA
        id: resolve-ref
        env:
          GH_TOKEN: ${{ secrets.GH_TOKEN }}
        run: |
          ref=${{ inputs.ref }}
          sha=$(gh api /repos/$GITHUB_REPOSITORY/commits/$ref | jq -r .sha)
          if [ -z "$sha" ]; then
            echo "Failed to resolve ref $ref (possibly missing GH_TOKEN env var?)" >&2
            exit 1
          fi
          echo "Expanded ref $ref to SHA $sha"
          echo "sha=$sha" >> $GITHUB_OUTPUT
      - uses: actions/checkout@v4
        with:
          ref: ${{ steps.resolve-ref.outputs.sha }}
      - uses: pnpm/action-setup@v2
        with:
          version: 8
      - run: git fetch origin gh-pages
      - id: base-sha
        run: echo "BASE_SHA=$(./parse-ghp-base-sha.py -d root origin/gh-pages)" >> $GITHUB_OUTPUT
      - name: Check whether www was changed
        id: www-changed
        env:
          BASE_SHA: ${{ steps.base-sha.outputs.BASE_SHA }}
        run: |
          echo "BASE_SHA: $BASE_SHA"
          git fetch --depth 1 origin $BASE_SHA
          echo "WWW_CHANGED=$([ $BASE_SHA != 'root' ] && git diff --quiet $BASE_SHA && echo '' || echo 'true')" >> $GITHUB_OUTPUT
      - run: |
          echo "WWW_CHANGED: ${{ steps.www-changed.outputs.WWW_CHANGED }}"
      - if: steps.www-changed.outputs.WWW_CHANGED
        uses: actions/setup-node@v3
        with:
          node-version: 19
          cache: 'pnpm'
          cache-dependency-path: www/pnpm-lock.yaml
      - name: pnpm install, build, export
        if: steps.www-changed.outputs.WWW_CHANGED
        env:
          S3_DBS: 1
        run: |
          cd www
          pnpm install
          pnpm run gha-export
          du -sh out
      - if: steps.www-changed.outputs.WWW_CHANGED
        name: Deploy to GH Pages
        uses: JamesIves/github-pages-deploy-action@v4
        with:
          branch: gh-pages
          folder: www/out