quay/storage/__init__.py

from storage.local import LocalStorage
from storage.s3 import S3Storage
from storage.fakestorage import FakeStorage


class Storage(object):
  def __init__(self, app=None):
    self.app = app
    if app is not None:
      self.state = self.init_app(app)
    else:
      self.state = None

  def init_app(self, app):
    storage_type = app.config.get('STORAGE_TYPE', 'LocalStorage')
    path = app.config.get('STORAGE_PATH', '')

    if storage_type == 'LocalStorage':
      storage = LocalStorage(path)

    elif storage_type == 'S3Storage':
      access_key = app.config.get('STORAGE_AWS_ACCESS_KEY', '')
      secret_key = app.config.get('STORAGE_AWS_SECRET_KEY', '')
      bucket = app.config.get('STORAGE_S3_BUCKET', '')
      storage = S3Storage(path, access_key, secret_key, bucket)

    else:
      storage = FakeStorage()

    # register extension with app
    app.extensions = getattr(app, 'extensions', {})
    app.extensions['storage'] = storage
    return storage

  def __getattr__(self, name):
    return getattr(self.state, name, None)