def _collect_folding_actions(self):
"""
find candidates for folding i.e. when a directory contains symlinks to
files that all share the same parent directory
"""
for parent in self.actions.get_unlink_target_parents():
items = utils.get_directory_contents(parent)
other_links_parents = []
other_links = []
source_parent = None
is_normal_files_detected = False
for item in items:
if item not in self.actions.get_unlink_targets():
does_item_exist = False
try:
does_item_exist = item.exists()
except PermissionError:
self.errors.add(
error.PermissionDenied(self.subcmd, item))
return
if does_item_exist and item.is_symlink():
source_parent = item.resolve().parent
other_links_parents.append(item.resolve().parent)
other_links.append(item)
else:
is_normal_files_detected = True
break
if not is_normal_files_detected:
other_links_parent_count = len(Counter(other_links_parents))
if other_links_parent_count == 1:
assert source_parent is not None
if utils.is_same_files(
utils.get_directory_contents(source_parent),
other_links):
self._fold(source_parent, parent)
elif (other_links_parent_count == 0
and not utils.is_same_file(parent, self.dest_input)):
self.actions.add(
actions.RemoveDirectory(self.subcmd, parent))
def _collect_clean_actions(self, source, source_names, dest):
subdests = utils.get_directory_contents(dest)
for subdest in subdests:
if subdest.is_symlink():
link_target = utils.readlink(subdest, absolute_target=True)
if (not link_target.exists() and not
source_names.isdisjoint(set(link_target.parents))):
self.actions.add(actions.UnLink(self.subcmd, subdest))
elif subdest.is_dir():
self._collect_clean_actions(source, source_names, subdest)
def get_directory_contents(self, directory):
"""
Get the contents of a directory while handling errors that may occur
"""
contents = []
try:
contents = utils.get_directory_contents(directory)
except PermissionError:
self.errors.add(error.PermissionDenied(self.subcmd, directory))
except FileNotFoundError:
self.errors.add(
error.NoSuchFileOrDirectory(self.subcmd, directory))
except NotADirectoryError:
self.errors.add(error.NoSuchDirectory(self.subcmd, directory))
return contents