image-pull-and-tag.yaml

name: Migrate Images to GHCR

on:
  push:
    branches:
      - image-cicd
    paths:
      - '.original-images.json'
  workflow_dispatch:

env:
  REGISTRY: ghcr.io

jobs:
  setup-matrix:
    runs-on: ubuntu-22.04
    outputs:
      matrix: ${{ steps.parse-json.outputs.matrix }}

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

      - name: Read images from .original-images.json
        id: parse-json
        run: |
          IMAGES=$(jq -c '.[]' < .original-images.json | jq -Rs 'split("\n")[:-1]')
#          echo "matrix=$IMAGES" >> $GITHUB_OUTPUT
          echo "matrix=$IMAGES"

  migrate-images:
    needs: setup-matrix
    runs-on: ubuntu-22.04

    strategy:
      fail-fast: false
      max-parallel: 3
      matrix:
        image: ${{ fromJson(needs.setup-matrix.outputs.matrix) }}

    steps:
      - name: Pull image from Source Registry
        run: |
          echo "Pulling image: ${{ matrix.image }}"
          docker pull ${{ matrix.image }}

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

      - name: Retag Image for GHCR
        run: |
          IMAGE_FULL="${{ matrix.image }}"
          IMAGE_NAME_WITH_TAG="${IMAGE_FULL#*/}"  # Remove registry prefix
          IMAGE_NAME_ONLY="$(echo $IMAGE_NAME_WITH_TAG | cut -d/ -f2 | cut -d: -f1)"  # Extract image name
          IMAGE_TAG="$(echo $IMAGE_NAME_WITH_TAG | cut -d: -f2)"  # Extract tag
          GHCR_IMAGE="${{ env.REGISTRY }}/${{ github.repository_owner }}/$IMAGE_NAME_ONLY:$IMAGE_TAG"

          echo "Retagging ${{ matrix.image }} to $GHCR_IMAGE"
          docker tag ${{ matrix.image }} $GHCR_IMAGE
          echo "GHCR_IMAGE=$GHCR_IMAGE" >> $GITHUB_ENV

      - name: Push to GHCR
        uses: docker/build-push-action@v6
        with:
          push: true
          tags: ${{ env.GHCR_IMAGE }}
          load: true