docker-build-publish.yml

name: Explorer Image
on:
  push:
    branches:
      - "**"
    tags:
      - "v[0-9]+.[0-9]+.[0-9]+"
      - "v[0-9]+.[0-9]+.[0-9]+-alpha.[0-9]+"
      - "v[0-9]+.[0-9]+.[0-9]+-beta.[0-9]+"
      - "v[0-9]+.[0-9]+.[0-9]+-rc[0-9]+"
  pull_request:

env:
  REGISTRY: ghcr.io
  MAINTAINER: ${{ github.repository_owner }}
  DESCRIPTION: "${{ github.repository_owner }} repository ${{ github.repository }}"
  BASE_NAME: "explorer"

jobs:
  prepare-env:
    runs-on: "ubuntu-latest"
    outputs:
      output_short_sha: ${{ steps.setting_env.outputs.short_sha }}
      output_image_name: ${{ steps.setting_env.outputs.image_name }}
    steps:
      - name: Checkout
        uses: "actions/checkout@v3"

      - name: Add vars to ENV
        id: setting_env
        run: |
          echo "SHORT_SHA=`echo ${GITHUB_SHA} | cut -c1-8`" >> $GITHUB_ENV
          echo "short_sha=`echo ${GITHUB_SHA} | cut -c1-8`" >> "$GITHUB_OUTPUT"
          # yamllint disable
          echo "IMAGE_NAME=$(echo ${{ github.repository_owner }}/${{ env.BASE_NAME }} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
          echo "image_name=$(echo ${{ github.repository_owner }}/${{ env.BASE_NAME }} | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
         # yamllint enable

  docker-build-base:
    runs-on: "ubuntu-latest"
    needs: prepare-env
    permissions:
      contents: write
      packages: write
    steps:
      - name: Checkout
        uses: "actions/checkout@v3"

      - name: Login to GHCR
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker Metadata
        id: meta
        uses: docker/metadata-action@v4
        env:
          OUTPUT_SHORT_SHA: ${{ needs.prepare-env.outputs.output_short_sha }}
          OUTPUT_IMAGE_NAME: ${{ needs.prepare-env.outputs.output_image_name }}
        with:
          images: ${{ env.REGISTRY }}/${{ env.OUTPUT_IMAGE_NAME }}
          # yamllint disable
          labels: |
            maintainer=${{ env.MAINTAINER }}
            commitUrl=https://github.com/${{ github.repository }}/commit/${{ github.sha }}
            dockerPull=docker pull ${{ env.REGISTRY }}/${{ github.repository }}:${{ env.OUTPUT_SHORT_SHA }}
            org.opencontainers.image.description=${{ env.DESCRIPTION }}
          tags: |
            # output minimal (short sha)
            type=raw,value={{sha}}
            # output v0.2.1/v*-*
            type=semver,pattern={{raw}}
            # pull request event
            type=ref,enable=true,prefix=pr-,suffix=,event=pr
          # yamllint enable

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      # We always build the image but we only push if we are on the `main`,
      # `master` branch or a versioned `v*` branch
      - name: Build and PushDocker Image
        uses: docker/build-push-action@v4
        env:
          OUTPUT_SHORT_SHA: ${{ needs.prepare-env.outputs.output_short_sha }}
          OUTPUT_IMAGE_NAME: ${{ needs.prepare-env.outputs.output_image_name }}
        with:
          platforms: linux/amd64
          # yamllint disable
          # The following line, is execute as an if statement, only push when
          # the branch is main, master or starts with v*
          push: ${{ github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v') }}
          # yamllint enable
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          file: docker/Dockerfile.build