sync-image.yml

name: sync-image

permissions:
  contents: read
  pull-requests: read
  actions: read

defaults:
  run:
    shell: bash

on:
  workflow_dispatch:
    inputs:
      # Example:
      # Input: "ghcr.io/owner/image:tag docker.io/owner/image2:tag>abc:tag"
      # Result:
      # - Sync "ghcr.io/owner/image:tag" to "docker.io/owner/mirrored-image:tag"
      # - Sync "docker.io/owner/image2:tag" to "docker.io/owner/mirrored-abc:tag"
      images:
        description: 'List of images to sync, inform of "src-registry/src-image src-registry/src-image-2>dst-image-2 ...".'
        required: true
        type: string

env:
  INPUT_PASSWORD: ${{ secrets.CI_DOCKERHUB_PASSWORD }}

jobs:
  sync:
    runs-on: macos-14
    steps:
      - name: Prepare Env
        env:
          INPUT_REPOSITORY_OWNER: ${{ github.repository_owner }}
        run: |
          INPUT_REPOSITORY_OWNER=$(echo "${INPUT_REPOSITORY_OWNER}" | tr '[:upper:]' '[:lower:]')
          echo "INPUT_USERNAME=${INPUT_REPOSITORY_OWNER}" >> $GITHUB_ENV
          echo "DEBUG: INPUT_USERNAME=${INPUT_USERNAME}"
      - name: Sync
        run: |
          #!/usr/bin/env bash
          
          echo "Checking for skopeo..."
          if ! command -v skopeo &> /dev/null; then
            brew install skopeo
          fi
          
          echo "Logging in to Docker Hub..."
          skopeo login docker.io -u ${{ env.INPUT_USERNAME }} -p ${{ env.INPUT_PASSWORD }}
          
          echo "Starting image sync..."
          IFS=' ' read -ra IMAGES <<< "${{ inputs.images }}"
          for image in "${IMAGES[@]}"; do
            src="$(echo $image | cut -d '>' -f 1)"
            dst="$(echo $image | cut -d '>' -f 2)"
            if [[ "${src}" == "${dst}" ]]; then
              dst="${src##*/}"
            fi
            dst="${dst#*/}" # Remove registry part if exists
            dst="docker.io/${{ env.INPUT_USERNAME }}/mirrored-${dst}"
            echo "Syncing ${src} to ${dst}"
            skopeo copy docker://${src} docker://${dst} --all --retry-delay 5s --retry-times 10
          done