def delete_package(self, pkg_name: str, top_hash: str = None):
package_path = self.pointers_dir(pkg_name)
paths = list(list_url(package_path))
if not paths:
raise QuiltException(
"No such package exists in the given directory.")
if top_hash is not None:
top_hash = self.resolve_top_hash(pkg_name, top_hash)
deleted = []
remaining = []
for path, _ in paths:
pkg_hash = get_bytes(self.pointer_pk(pkg_name, path)).decode()
(deleted if pkg_hash == top_hash else remaining).append(path)
if not deleted:
raise QuiltException(
"No such package version exists in the given directory.")
for path in deleted:
delete_url(self.pointer_pk(pkg_name, path))
if 'latest' in deleted and remaining:
# Create a new "latest". Technically, we need to compare numerically,
# but string comparisons will be fine till year 2286.
new_latest = max(remaining)
copy_file(self.pointer_pk(pkg_name, new_latest),
self.pointer_latest_pk(pkg_name))
else:
for path, _ in paths:
delete_url(self.pointer_pk(pkg_name, path))
def resolve_top_hash(self, pkg_name: str, hash_prefix: str) -> str:
if len(hash_prefix) == 64:
top_hash = hash_prefix
elif 6 <= len(hash_prefix) < 64:
matching_hashes = [self._top_hash_from_path(h) for h, _
in list_url(self.manifests_package_dir(pkg_name))
if h.startswith(hash_prefix)]
if not matching_hashes:
raise QuiltException("Found zero matches for %r" % hash_prefix)
elif len(matching_hashes) > 1:
raise QuiltException("Found multiple matches: %r" % hash_prefix)
else:
top_hash = matching_hashes[0]
else:
raise QuiltException("Invalid hash: %r" % hash_prefix)
# TODO: verify that name is correct with respect to this top_hash
return top_hash
def delete_package_version(self, pkg_name: str, top_hash: str):
deleted = []
remaining = []
for path, pkg_hash in self.list_package_versions(pkg_name):
(deleted if pkg_hash == top_hash else remaining).append(path)
if not deleted:
raise QuiltException("No such package version exists in the given directory.")
for path in deleted:
delete_url(self.pointer_pk(pkg_name, path))
if 'latest' in deleted and remaining:
# Create a new "latest". Technically, we need to compare numerically,
# but string comparisons will be fine till year 2286.
new_latest = max(remaining)
copy_file(self.pointer_pk(pkg_name, new_latest), self.pointer_latest_pk(pkg_name))