name: Publish Docker image to registries

# Builds image and tags based on the type of push event:
# * branch push -> tag is branch name IE context-mod:edge
# * release (tag) -> tag is release name IE context-mod:0.13.0
#
# Then pushes tagged images to multiple registries
#
# Based on
# https://github.com/docker/build-push-action/blob/master/docs/advanced/push-multi-registries.md
# https://github.com/docker/metadata-action

on:
  push:
    branches:
      - 'master'
      - 'edge'
    tags:
      - '*.*.*'
    # don't trigger if just updating docs
    paths-ignore:
      - '**.md'

jobs:
  push_to_registry:
    name: Build and Push Docker image to registries
    runs-on: ubuntu-latest
    # https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions-for-the-github_token
    permissions:
      packages: write
      contents: read
    steps:
      - name: Check out the repo
        uses: actions/checkout@v2
      
      - name: Log in to Docker Hub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Login to GitHub Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: |
            foxxmd/context-mod
            ghcr.io/foxxmd/context-mod
          # generate Docker tags based on the following events/attributes
          tags: |
            type=raw,value=latest,enable=${{ endsWith(github.ref, 'master') }}
            type=ref,event=branch,enable=${{ !endsWith(github.ref, 'master') }}
            type=semver,pattern={{version}}
          flavor: |
            latest=false
      
      - name: Build and push Docker image
        if: ${{ !env.ACT }}
        uses: docker/build-push-action@v3
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}