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import json
import pathlib
import urllib.request
import urllib.parse
from typing import Dict, List
def get_registry_uri(namespace: str,
gitlab_uri: str = "https://gitlab.com") -> str:
"""
Construct a v4 API URI pointing the namespaced project's image registry.
:param namespace: GitLab project namespace, e.g. "libvirt/libvirt"
:param gitlab_uri: GitLab base URI, can be a private deployment
:param api_version: GitLab REST API version number
:return: URI pointing to a namespaced project's image registry
"""
# this converts something like "libvirt/libvirt" to "libvirt%2Flibvirt"
namespace_urlenc = urllib.parse.quote_plus(namespace)
project_uri = f"{gitlab_uri}/api/v4/projects/{namespace_urlenc}"
uri = project_uri + "/registry/repositories"
return uri
def get_registry_images(uri: str) -> List[Dict]:
"""
List all container images that are currently available in the given GitLab
project.
:param uri: URI pointing to a GitLab instance's image registry
:return: list of container image names
"""
r = urllib.request.urlopen(uri + "?per_page=100")
# read the HTTP response and load the JSON part of it
return json.loads(r.read().decode())
def get_dockerfiles(base_dir) -> List:
"""
List all container dockerfiles in the local directory.
:return: list of dockerfile names
"""
dkrs = []
d = pathlib.Path(base_dir, "containers")
for f in d.iterdir():
if f.suffix == ".Dockerfile":
dkrs.append(f.stem)
return dkrs
def get_registry_stale_images(registry_uri: str, base_dir: str) -> Dict[str, int]:
"""
Check the GitLab image registry for images that we no longer support and
which should be deleted.
:param uri: URI pointing to a GitLab instance's image registry
:param base_dir: local repository base directory
:return: dictionary formatted as: {<gitlab_image_name>: <gitlab_image_id>}
"""
dockerfiles = get_dockerfiles(base_dir)
images = get_registry_images(registry_uri)
name_prefix = "ci-"
stale_images = {}
for img in images:
if img["name"][len(name_prefix):] not in dockerfiles:
stale_images[img["name"]] = img["id"]
return stale_images
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