build-gazebo-world-ws.yaml

name: Build Docker Image for gazebo-world-ws

on:
  push:
    branches:
      - "main"
    tags:
      - v*
    paths:
      - .github/workflows/build-gazebo-world-ws.yaml
      - gazebo_world_ws/docker/Dockerfile
      - gazebo_world_ws/docker/.dockerignore
      - gazebo_world_ws/docker/.bashrc

jobs:
  docker:
    if: github.repository == 'j3soon/ros2-essentials'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - # Ref: https://docs.github.com/en/packages/managing-github-packages-using-github-actions-workflows/publishing-and-installing-a-package-with-github-actions#upgrading-a-workflow-that-accesses-a-registry-using-a-personal-access-token
        name: Prepare tag name as environment variable
        run: |
          # This strips the git ref prefix from the version.
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          # This strips the "v" prefix from the tag name.
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
          # This uses the Docker `latest` tag convention.
          [ "$VERSION" == "main" ] && VERSION=latest
          # Output the environment variable
          # Ref: https://stackoverflow.com/a/57989070
          echo "VERSION=$VERSION" >> $GITHUB_ENV
      - name: Docker meta
        id: meta
        # Ref: https://github.com/docker/metadata-action
        uses: docker/metadata-action@v5
        with:
          # Link: https://hub.docker.com/repository/docker/j3soon/ros2-gazebo-world-ws/tags
          images: ${{ secrets.DOCKERHUB_USERNAME }}/ros2-gazebo-world-ws
          tags: |
            type=raw,value={{date 'YYYYMMDD'}}
            type=raw,value=${{ env.VERSION }}
      - name: Login to Docker Hub
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Build and push
        uses: docker/build-push-action@v4
        with:
          context: gazebo_world_ws/docker
          push: true
          tags: ${{ steps.meta.outputs.tags }}