mirror of
https://github.com/quay/quay.git
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112 lines
2.7 KiB
Python
112 lines
2.7 KiB
Python
import urllib
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import re
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import anunidecode # Don't listen to pylint's lies. This import is required for unidecode below.
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from uuid import uuid4
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REPOSITORY_NAME_REGEX = re.compile(r"^[\.a-z0-9_-]{1,255}$")
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VALID_TAG_PATTERN = r"[\w][\w.-]{0,127}"
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FULL_TAG_PATTERN = r"^[\w][\w.-]{0,127}$"
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TAG_REGEX = re.compile(FULL_TAG_PATTERN)
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TAG_ERROR = (
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'Invalid tag: must match [A-Za-z0-9_.-], NOT start with "." or "-", '
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"and can contain 1-128 characters"
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)
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class ImplicitLibraryNamespaceNotAllowed(Exception):
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"""
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Exception raised if the implicit library namespace was specified but is not allowed.
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"""
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pass
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def escape_tag(tag, default="latest"):
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"""
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Escapes a Docker tag, ensuring it matches the tag regular expression.
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"""
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if not tag:
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return default
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tag = re.sub(r"^[^\w]", "_", tag)
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tag = re.sub(r"[^\w\.-]", "_", tag)
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return tag[0:127]
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def parse_namespace_repository(
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repository, library_namespace, include_tag=False, allow_library=True
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):
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repository = repository.encode("unidecode", "ignore")
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parts = repository.rstrip("/").split("/", 1)
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if len(parts) < 2:
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namespace = library_namespace
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repository = parts[0]
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if not allow_library:
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raise ImplicitLibraryNamespaceNotAllowed()
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else:
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(namespace, repository) = parts
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if include_tag:
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parts = repository.split(":", 1)
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if len(parts) < 2:
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tag = "latest"
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else:
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(repository, tag) = parts
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repository = urllib.quote_plus(repository)
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if include_tag:
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return (namespace, repository, tag)
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return (namespace, repository)
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def format_robot_username(parent_username, robot_shortname):
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return "%s+%s" % (parent_username, robot_shortname)
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def parse_robot_username(robot_username):
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if not "+" in robot_username:
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return None
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return robot_username.split("+", 2)
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def parse_urn(urn):
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"""
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Parses a URN, returning a pair that contains a list of URN namespace parts, followed by the
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URN's unique ID.
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"""
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if not urn.startswith("urn:"):
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return None
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parts = urn[len("urn:") :].split(":")
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return (parts[0 : len(parts) - 1], parts[len(parts) - 1])
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def parse_single_urn(urn):
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"""
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Parses a URN, returning a pair that contains the first namespace part, followed by the URN's
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unique ID.
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"""
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result = parse_urn(urn)
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if result is None or not len(result[0]):
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return None
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return (result[0][0], result[1])
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uuid_generator = lambda: str(uuid4())
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def urn_generator(namespace_portions, id_generator=uuid_generator):
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prefix = "urn:%s:" % ":".join(namespace_portions)
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def generate_urn():
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return prefix + id_generator()
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return generate_urn
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