name: refresh
# Refresh a venture that lives on gh-pages and makes some of its own files (fonts, art, screenshots, generated
# code): run ventures/<slug>/tools/build.sh on the runner, in place, then commit what changed to gh-pages in one
# commit and ask Teahub pages to pull. Actions -> refresh -> Run workflow.
# `from` takes the venture's folder from another branch (say, a rework in progress), so the new version is built and
# lands whole instead of file by file. The build runs in a checkout without credentials; only ventures/<slug>/ comes
# back. Chrome for screenshots: CHROME (Playwright's Chromium is installed when the runner has none), with
# CHROME_FLAGS for running as root.
on:
  workflow_dispatch:
    inputs:
      slug:
        description: "The venture: ventures/<slug>/ on gh-pages, with a tools/build.sh"
        required: true
        type: string
      from:
        description: "Branch to take the venture's folder from (empty: gh-pages itself)"
        required: false
        type: string
permissions:
  contents: write
concurrency:
  group: venture          # the venture loop and seed write gh-pages too: take turns
  cancel-in-progress: false
jobs:
  refresh:
    runs-on: ubuntu-latest
    timeout-minutes: 20
    steps:
      - name: check the inputs
        env:                     # inputs reach the scripts through the environment, never interpolated into them
          SLUG: ${{ inputs.slug }}
          FROM: ${{ inputs.from }}
        run: |
          printf '%s' "$SLUG" | grep -Eqx '[a-z0-9]([a-z0-9-]{0,40}[a-z0-9])?' || { echo "::error::bad slug: $SLUG"; exit 1; }
          [ -z "$FROM" ] || printf '%s' "$FROM" | grep -Eqx '[A-Za-z0-9._/-]{1,100}' || { echo "::error::bad branch: $FROM"; exit 1; }
      - uses: actions/checkout@v5
        with:
          ref: ${{ inputs.from || 'gh-pages' }}
          path: work
          fetch-depth: 1
          sparse-checkout: ventures/${{ inputs.slug }}
          persist-credentials: false   # the build that runs next must not find a token in .git/config
      - uses: actions/setup-node@v4
        with:
          node-version: 22
      - name: find Chrome, or install Playwright's Chromium
        run: |
          set -eu
          for c in google-chrome google-chrome-stable chromium chromium-browser; do
            if command -v "$c" >/dev/null 2>&1; then
              echo "CHROME=$(command -v "$c")" >> "$GITHUB_ENV"; echo "using $(command -v "$c")"; exit 0
            fi
          done
          echo "no Chrome on this runner: installing Playwright's Chromium"
          npx -y playwright@1.55.0 install --with-deps chromium > /tmp/pw.log 2>&1 || { tail -20 /tmp/pw.log; exit 1; }
          c=$(find "$HOME/.cache/ms-playwright" -type f -name chrome -path '*chrome-linux*' | head -1)
          [ -n "$c" ] && [ -x "$c" ] || { echo "::error::no Chromium after the install"; exit 1; }
          echo "CHROME=$c" >> "$GITHUB_ENV"; echo "using $c"
      - name: build
        env:
          SLUG: ${{ inputs.slug }}
          CHROME_FLAGS: "--no-sandbox --disable-dev-shm-usage --disable-gpu"
        run: |
          set -eu
          [ -f "work/ventures/$SLUG/tools/build.sh" ] || { echo "::error::ventures/$SLUG has no tools/build.sh"; exit 1; }
          sh "work/ventures/$SLUG/tools/build.sh"
      - uses: actions/checkout@v5
        with:
          ref: gh-pages
          path: pages
          fetch-depth: 1
      - name: commit what changed
        env:
          SLUG: ${{ inputs.slug }}
          FROM: ${{ inputs.from }}
        run: |
          set -eu
          [ -f "pages/ventures/ventures.json" ] || { echo "::error::no ledger on gh-pages"; exit 1; }
          find "work/ventures/$SLUG" -name __pycache__ -type d -prune -exec rm -rf {} +
          if [ -n "$FROM" ]; then
            # a rework from another branch lands whole, in place of what gh-pages has
            rm -rf "pages/ventures/$SLUG"
            cp -R "work/ventures/$SLUG" "pages/ventures/$SLUG"
            cd pages
            git add --all "ventures/$SLUG"
          else
            # the build's own changes only, applied to the newest gh-pages: the source was checked out minutes ago, and
            # copying it whole would revert whatever landed since (it did, once)
            cd work
            git add --all "ventures/$SLUG"
            git diff --cached --binary > ../build.patch
            cd ../pages
            git pull -q --rebase origin gh-pages
            if [ -s ../build.patch ]; then
              git apply --index --3way ../build.patch || { echo "::error::the build's changes don't apply to gh-pages as it stands now: refresh again"; exit 1; }
            fi
          fi
          if git diff --cached --quiet; then echo "nothing changed in ventures/$SLUG"; exit 0; fi
          git diff --cached --stat | tail -25
          git -c user.name='github-actions[bot]' -c user.email='github-actions[bot]@users.noreply.teahub.xyz' \
            commit -q -m "ventures: refresh $SLUG${FROM:+ from $FROM}"
          if ! git push -q origin HEAD:gh-pages; then   # gh-pages moved under us: replay this one commit on top
            git pull -q --rebase origin gh-pages
            git push -q origin HEAD:gh-pages
          fi
          echo "refreshed: ventures/$SLUG -> https://$SLUG.yolopreneur.lol/"
      - name: tell Teahub pages to pull
        run: curl -fsS -X POST "https://yolopreneur.lol/_hook/${GITHUB_REPOSITORY}" || echo "pages pulls by itself within five minutes"