docker-tutorial-image.yml

name: Docker image for tutorial

on:
  push:
    branches: [ "ispass2026" ]

jobs:
  build:
    runs-on: self-hosted
    
    permissions:
      contents: read
      packages: write

    steps:
      # Step 1: Checkout the repository
      - name: Checkout Code
        uses: actions/checkout@v4

      # Step 2: Log in to GitHub Container Registry
      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: PyTorch base image from manifest
        run: |
          PYTORCH_IMAGE=$(python3 -c "import json; from pathlib import Path; v=json.loads(Path('thirdparty/github-releases.json').read_text()).get('pytorch_image'); print(v or '')")
          if [ -z "$PYTORCH_IMAGE" ]; then echo "thirdparty/github-releases.json: pytorch_image is required" >&2; exit 1; fi
          echo "PYTORCH_IMAGE=$PYTORCH_IMAGE" >> "$GITHUB_ENV"

      - name: Build and Push Docker Image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./tutorial/jupyterhub/Dockerfile.tutorial
          push: true
          build-args: |
            PYTORCH_IMAGE=${{ env.PYTORCH_IMAGE }}
            PYTORCHSIM_GIT_REF=${{ github.sha }}
          tags: ghcr.io/psal-postech/torchsim-tutorial:ispass2026