Sync dockerhub images to ghcr.io or other registry

migrate.py

"""
Sync dockerhub images to ghcr.io or other registry

Usage:

1. create tag list file `tags.txt` that syncing to ghcr.io

```
git tag > tags.txt

# or get from dockerhub API
curl -s https://registry.hub.docker.com/v1/repositories/[IMAGE_NAME]/tags | jq -r 'map(.name) | .[]' > tags.json
```

2. Run script with `--dry-run` options to test

```
python ./migrate.py --name [IMAGE_NAME] --dry-run
```

3. Actually run script

```
python ./migrate.py --name [IMAGE_NAME]
```

Other options:

```
python ./migrate.py --help
```

"""
import argparse
import subprocess
from typing import List


parser = argparse.ArgumentParser(description='Sync docker image to other registry')
parser.add_argument('--dry-run', action='store_true', help='Dry run')
parser.add_argument('--registry', default='ghcr.io', help="Registry name, default is ghcr.io")
parser.add_argument("--name", type=str, required=True, help="Image name")
args = parser.parse_args()


image_name = args.name
PREFIX = args.registry

def exec(cmd: str):
  print(cmd)
  if args.dry_run:
    return
  subprocess.run(cmd, shell=True, capture_output=True)


def get_tags() -> List[str]:
  with open('./tags.txt') as f:
    return [l.strip() for l in f.readlines()]


def convert_and_push(tag: str):
  image = f'{image_name}:{tag}'
  ghcr_image_name = f'{PREFIX}/{image}'
  exec(f'docker pull {image}')
  exec(f'docker image tag {image} {ghcr_image_name}')
  exec(f'docker push {ghcr_image_name}')
  exec(f'docker image rm {image} {ghcr_image_name}')


if __name__ == '__main__':
  tags = get_tags()
  if args.dry_run:
    print(args.name)
    convert_and_push(tags[0])
    exit(0)

  for tag in tags:
    convert_and_push(tag)