deploy.yml

name: Build & Deploy

on:
  push:
    branches: [main]
  workflow_dispatch:
    inputs:
      force:
        description: 'Force full rebuild even if nothing changed'
        type: boolean
        default: false

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.14.3'

      - name: Install Python deps
        run: pip install -r requirements.txt

      - name: Detect changes
        id: changes
        run: |
          DATASET_HASH=$(python3 -c "
          import hashlib, os
          h = hashlib.sha256()
          for root, _, files in os.walk('dataset/stats'):
              for fname in sorted(files):
                  if not fname.endswith('.json'): continue
                  path = os.path.join(root, fname)
                  h.update(path.encode())
                  with open(path, 'rb') as f:
                      for chunk in iter(lambda: f.read(65536), b''): h.update(chunk)
          print(h.hexdigest())
          ")
          echo "dataset_hash=$DATASET_HASH" >> $GITHUB_OUTPUT
          echo "Dataset hash: ${DATASET_HASH:0:16}…"

          git fetch origin gh-pages --depth=1 2>/dev/null || true
          DEPLOYED_HASH=$(git show origin/gh-pages:meta_info.json 2>/dev/null \
            | python3 -c "import sys,json; print(json.load(sys.stdin).get('dataset_hash',''))" \
            2>/dev/null || echo "")

          if [ "$DATASET_HASH" != "$DEPLOYED_HASH" ]; then
            echo "dataset_changed=true"  >> $GITHUB_OUTPUT
            echo "Dataset: CHANGED (deployed=${DEPLOYED_HASH:0:16}…)"
          else
            echo "dataset_changed=false" >> $GITHUB_OUTPUT
            echo "Dataset: unchanged"
          fi

          if git diff --quiet HEAD~1 HEAD -- frontend/ 2>/dev/null; then
            echo "frontend_changed=false" >> $GITHUB_OUTPUT
            echo "Frontend: unchanged"
          else
            echo "frontend_changed=true"  >> $GITHUB_OUTPUT
            echo "Frontend: CHANGED"
          fi

          FORCE="${{ github.event.inputs.force }}"
          DISPATCH="${{ github.event_name }}"
          if [ "$DATASET_HASH" != "$DEPLOYED_HASH" ] \
              || ! git diff --quiet HEAD~1 HEAD -- frontend/ 2>/dev/null \
              || [ "$DISPATCH" = "workflow_dispatch" ] \
              || [ "$FORCE" = "true" ]; then
            echo "should_deploy=true"  >> $GITHUB_OUTPUT
            echo "→ Deploy: YES"
          else
            echo "should_deploy=false" >> $GITHUB_OUTPUT
            echo "→ Deploy: SKIP (nothing changed)"
          fi

      - name: Build mega_db.json
        if: |
          steps.changes.outputs.dataset_changed == 'true' ||
          github.event.inputs.force == 'true' ||
          github.event_name == 'workflow_dispatch'
        run: python build_data.py

      - name: Set up Node
        if: steps.changes.outputs.should_deploy == 'true'
        uses: actions/setup-node@v4
        with:
          node-version: '25'
          cache: 'npm'
          cache-dependency-path: frontend/package-lock.json

      - name: Install JS deps
        if: steps.changes.outputs.should_deploy == 'true'
        working-directory: frontend
        run: npm install

      - name: Vite build
        if: steps.changes.outputs.should_deploy == 'true'
        working-directory: frontend
        run: VITE_BASE_PATH=/WTMETACenter/ VITE_GA_ID=${{ secrets.GA_ID }} npm run build

      - name: Deploy to GitHub Pages
        if: steps.changes.outputs.should_deploy == 'true'
        uses: peaceiris/actions-gh-pages@v4
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: frontend/dist