#*******************************************************************************
# buildBuilderImage.yml
#
# Workflow to build a multiarch Docker image that includes all of the tools for
# building maiko for linux.  Intended to be used (exclusively?) by the github
# actions that build maiko releases - e.g., buildRelease.yml.
#
# The purpose is to make the maiko github actions quicker and less resource
# consuming by not hving to intll the tools every time and instead just reuse
# this Docker image.
#
#
# Copyright 2023 by Interlisp.org
#
# Frank Haasz 2023-02-21
#
# ******************************************************************************

name: 'Build/Push Builder Image'

# Run this workflow on ...
on: workflow_dispatch

defaults:
  run:
    shell: bash

jobs:

  buildBuilder:

    runs-on: ubuntu-latest

    steps:
      # Checkout maiko
      - name: Checkout maiko
        uses: actions/checkout@v3

      # Setup docker environment variables
      - name: Setup Docker Environment Variables
        id: docker_env
        run: |
          DOCKER_REGISTRY="ghcr.io"
          DOCKER_NAMESPACE=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')
          DOCKER_REPO=${DOCKER_REGISTRY}/${DOCKER_NAMESPACE}/maiko-builder
          DOCKER_TAGS="${DOCKER_REPO}:latest"
          echo "BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> ${GITHUB_ENV}
          echo "DOCKER_TAGS=${DOCKER_TAGS}" >> ${GITHUB_ENV}

      # Setup the Docker Machine Emulation environment.  
      - name: Set up QEMU
        uses: docker/setup-qemu-action@master
        with:
          platforms: linux/amd64,linux/arm64,linux/arm/v7

      # Setup the Docker Buildx funtion
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@master

      # Login to ghcr.io
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Do the Docker Build using the Dockerfile_builder in the repository we
      # checked out.  Push the result to ghcr.io.
      #
      - name: Build Docker Images for Push to GHCR
        if: ${{ true }}
        uses: docker/build-push-action@v4
        with:
          builder: ${{ steps.buildx.outputs.name }}
          build-args: |
            BUILD_DATE=${{ env.BUILD_DATE }}
          context: ./.github/workflows
          file: ./.github/workflows/Dockerfile_builder
          platforms: linux/amd64,linux/arm64,linux/arm/v7
          # Push the result to DockerHub
          push: true
          tags: ${{ env.DOCKER_TAGS }}


######################################################################################