docker-image.yaml

name: "GHCR: Command-Line Container"

# Builds the Underworld3 command-line Docker image and pushes to GHCR.
# Uses container/Containerfile (micromamba-based image for local use).
#
# This is separate from binder-image.yml which builds Binder-ready images
# optimized for mybinder.org.

on:
  push:
    branches: [main, development]
    paths:
      # Only rebuild when these files change
      - 'container/Containerfile'
      - 'environment.yaml'
      - 'src/**/*.pyx'
      - 'src/**/*.c'
      - 'setup.py'
      - 'pyproject.toml'
  workflow_dispatch:
    inputs:
      force_rebuild:
        description: 'Force full rebuild (no cache)'
        type: boolean
        default: false

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Extract branch name
        run: echo "BRANCH=${GITHUB_REF##*/}" >> $GITHUB_ENV

      - name: Login to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          file: container/Containerfile
          platforms: linux/amd64
          no-cache: ${{ inputs.force_rebuild || false }}
          tags: |
            ghcr.io/underworldcode/underworld3:${{ env.BRANCH }}
            ghcr.io/underworldcode/underworld3:latest