def update(self, known_only=False):
"""Update our set of dropboxes to represent the latest state on disk
@param known_only if True will not actually search for new dropboxes, but only check if existing dropboxes
have had their configuration changed or were removed
@return self"""
def update_stat(dbpath, stat, db):
try:
new_stat = dbpath.stat()
except OSError:
del self.dropboxes[dbpath]
self._dropbox_removed(db)
else:
if new_stat.st_size != stat.st_size or new_stat.st_mtime != stat.st_mtime:
self.dropboxes[dbpath] = (new_stat, db)
self._dropbox_changed(stat, new_stat, db)
# end handle change
# end handle dropbox doesn't exist
# end utility to test stat
if known_only:
for dbpath, (stat, db) in self.dropboxes.iteritems():
update_stat(dbpath, stat, db)
# end for each stat, db
else:
seen_paths = set()
for search_base in self.paths:
if search_base.endswith(os.path.sep):
search_base = Path(search_base[:-1])
# end assure we don't end with slash
if not search_base.isdir():
log.warn("Skipping unaccessible search base at '%s'", search_base)
continue
# end
log.debug("Searching for dropboxes under '%s' (depth=%i, glob='%s')",
search_base, self.max_depth, self.config_file_glob)
num_dropboxes = 0 # Amount of dropboxes found for this search base
for root, dirs, files in os.walk(search_base):
if root[len(search_base):].count(os.path.sep) == self.max_depth - 1:
del dirs[:]
# end handle aborting recursion
for match in (f for f in files if fnmatch(f, self.config_file_glob)):
dbpath = Path(root) / match
seen_paths.add(dbpath)
num_dropboxes += 1
if dbpath in self.dropboxes:
# check for change
stat, db = self.dropboxes[dbpath]
update_stat(dbpath, stat, db)
else:
# handle new dropbox
try:
stat = dbpath.stat()
except OSError:
log.error("Couldn't stat dropbox configuration at '%s' even though it was found during search", dbpath)
else:
dropbox = self.DropboxType(dbpath)
self.dropboxes[dbpath] = (stat, dropbox)
self._dropbox_added(stat, dropbox)
# end handle inaccessible config file (invalid ACL ?)
# end handle update or new
# end handle each match
# end for each root, dir, files
if num_dropboxes == 0:
log.warn("Didn't find a single dropbox in search base '%s'", search_base)
# end info log
# end for each search_base
# Check for deleted
for deleted_db_path in (set(self.dropboxes.keys()) - seen_paths):
stat, db = self.dropboxes[deleted_db_path]
del self.dropboxes[deleted_db_path]
self._dropbox_removed(stat, db)
# end for each deleted
# end handle known only
return self
