build_and_push_image.yml

name: Build and push base build image

# workflow based on https://docs.github.com/en/actions/publishing-packages/publishing-docker-images#publishing-images-to-github-packages
on:
  workflow_dispatch:

jobs:
  build-and-push-image:
    env:
      REGISTRY: ghcr.io
      IMAGE_NAME: ${{ github.repository }}-centos7-build-image
    runs-on: ubuntu-20.04
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4.1.0

      - name: Log in to the Container registry
        uses: docker/login-action@v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5.0.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v5.0.0
        with:
          file: ./docker/centos-build.dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}