Commit 772d96ea authored by Dom Sekotill's avatar Dom Sekotill
Browse files

Merge branch '13-cache-images' into 'main' 

Add Image tag cache

See merge request !8
parents 30f7e18a b6c858f9

behave_utils/docker.py

+17 −2
Original line number Diff line number Diff line
@@ -174,6 +174,8 @@ class Image(Item): 
	Docker image items

	"""



	_cache = dict[str, str]()



	T = TypeVar('T', bound='Image')



	def __init__(self, iid: str):
@@ -200,10 +202,23 @@ class Image(Item): 
		"""

		Pull an image from a registry

		"""

		try:

			iid = cls._cache[repository]

		except KeyError:

			docker(b"pull", repository)

		iid = Item(repository).inspect().path('$.Id', str)

			iid = cls._process_image(repository)

		return cls(iid)



	@classmethod

	def _process_image(cls, reference: str) -> str:

		report = Item(reference).inspect()

		iid = report.path("$.Id", str)

		cls._cache.update(

			((tag, iid) for tag in report.path("$.RepoTags", list[str])),

			reference=iid,

		)

		return iid



	def get_id(self) -> str:

		"""

		Return an identifier for the Docker Image