release.yml

name: "Build and release container image"

on:
  push:
    branches:
      - "main"
  release:
    types:
      - "published"


# Default to bash in login mode for all steps; key to activating conda
# environment!
#     https://github.com/mamba-org/provision-with-micromamba#IMPORTANT
defaults:
  run:
    shell: "bash -l {0}"



jobs:

  build-and-release-image:
    name: "Build and release container image"
    runs-on: "ubuntu-latest"
    env:
      IMAGE_NAME: "nsidc/usaon-vta-survey"
      # GitHub Actions expressions don't have great conditional support, so
      # writing a ternary expression looks a lot like bash. In Python, this
      # would read as:
      #     github.event.release.tag_name if github.event_name == 'release' else 'latest'
      #     https://docs.github.com/en/actions/learn-github-actions/expressions
      IMAGE_TAG: "${{ github.event_name == 'release' && github.event.release.tag_name || 'latest' }}"
    steps:
      - name: "Check out repository"
        uses: "actions/checkout@v3"

      - name: "Build container image"
        run: |
          docker build -t "${IMAGE_NAME}:${IMAGE_TAG}" .

      - name: "DockerHub login"
        uses: "docker/login-action@v2"
        with:
          username: "${{secrets.DOCKER_USER}}"
          password: "${{secrets.DOCKER_PASS}}"

      - name: "GHCR login"
        uses: "docker/login-action@v2"
        with:
          registry: "ghcr.io"
          username: "${{ github.repository_owner }}"
          password: "${{ secrets.GITHUB_TOKEN }}"

      - name: "Push to DockerHub and GHCR"
        run: |
          docker push "${IMAGE_NAME}:${IMAGE_TAG}"

          docker tag "${IMAGE_NAME}:${IMAGE_TAG}" "ghcr.io/${IMAGE_NAME}:${IMAGE_TAG}"
          docker push "ghcr.io/${IMAGE_NAME}:${IMAGE_TAG}"