deploy-hf.yml

name: Deploy backend to Hugging Face Space

# Auto-sync the backend to the HF Space on every push to main that touches
# backend files. You can also run it manually from the Actions tab.
on:
  push:
    branches: [main]
    paths:
      - "api/**"
      - "preprocessing/**"
      - "models/**"
      - "Dockerfile"
      - "requirements-backend.txt"
      - "deploy/huggingface/README.md"
      - ".github/workflows/deploy-hf.yml"
  workflow_dispatch: {}   # allow manual runs

# Avoid overlapping deploys if you push twice quickly.
concurrency:
  group: deploy-hf
  cancel-in-progress: true

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout project
        uses: actions/checkout@v4
        with:
          lfs: false

      - name: Assemble Space files into a clean folder
        run: |
          set -e
          rm -rf space_build
          mkdir -p space_build
          cp Dockerfile space_build/
          cp requirements-backend.txt space_build/
          # The Space README MUST be the one with HF frontmatter:
          cp deploy/huggingface/README.md space_build/README.md
          cp -r api space_build/api
          cp -r preprocessing space_build/preprocessing
          cp -r models space_build/models
          # Drop caches / backups that shouldn't ship.
          find space_build -type d -name "__pycache__" -prune -exec rm -rf {} +
          rm -rf space_build/models/backup_* || true
          # Commit small model files as plain git (no LFS) inside the Space repo.
          printf '%s\n' '*.h5 -filter -diff -merge text=auto' '*.pkl -filter -diff -merge text=auto' > space_build/.gitattributes

      - name: Push to Hugging Face Space
        env:
          HF_TOKEN: ${{ secrets.HF_TOKEN }}
          HF_USERNAME: ${{ secrets.HF_USERNAME }}
          HF_SPACE: ${{ secrets.HF_SPACE }}
        run: |
          set -e
          if [ -z "$HF_TOKEN" ] || [ -z "$HF_USERNAME" ] || [ -z "$HF_SPACE" ]; then
            echo "::error::Missing secrets. Set HF_TOKEN, HF_USERNAME and HF_SPACE in repo Settings → Secrets → Actions."
            exit 1
          fi

          cd space_build
          git init -q
          git checkout -q -b main
          git config user.name  "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add .
          git commit -q -m "Sync backend from ${GITHUB_SHA::7}"

          REMOTE="https://${HF_USERNAME}:${HF_TOKEN}@huggingface.co/spaces/${HF_USERNAME}/${HF_SPACE}"
          # Force-push: the Space mirrors the backend subset of this repo.
          git push -f "$REMOTE" main
          echo "✅ Pushed to https://huggingface.co/spaces/${HF_USERNAME}/${HF_SPACE}"