publish-docker.yml

name: Publish Docker image on GHCR
# https://docs.github.com/en/packages/managing-github-packages-using-github-actions-workflows/publishing-and-installing-a-package-with-github-actions

on:
  workflow_dispatch:
  push:
    tags:
      - "v*.*.*"

# Defines two custom environment variables for the workflow.
# These are used for the Container registry domain,
# and a name for the Docker image that this workflow builds.
env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-and-push-image:
    runs-on: ubuntu-22.04

    # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
    permissions:
      contents: read
      packages: write

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

      # Uses the `docker/login-action` action to log in to the Container registry using
      # the account and password that will publish the packages.
      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Extract tags and labels that will be applied to the specified image.
      # The `id` "meta" allows the output of this step to be referenced in a subsequent
      # step.
      # The `images` value provides the base name for the tags and labels.
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      # Build the image based on your repository's `Dockerfile`.
      # If the build succeeds, it pushes the image to GitHub Packages.
      # It uses the `context` parameter to define the build's context as the set of
      # files located in the specified path.
      # It uses the `tags` and `labels` parameters to tag and label the image with
      # the output from the "meta" step.
      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: |
            ${{ steps.meta.outputs.tags }}
            ${{ env.REGISTRY }}/aboutcode-org/dejacode:latest
          labels: ${{ steps.meta.outputs.labels }}