Just about ready to actually purge file items

This commit is contained in:
Mike 2019-02-27 16:25:10 -08:00
parent e56c4b8881
commit 77bed65e89

View File

@ -2,6 +2,7 @@
import datetime
import os
import sys
import yaml
@ -76,6 +77,79 @@ class BackupRotator:
def rotate_path(self, path):
self.log("Rotating path", path)
if "maximum-items" not in self.__config:
raise Exception("Please provide config key: \"maximum-items\"")
max_items = self.__config["maximum-items"]
if not os.path.isdir(path):
raise Exception("Path should be a directory:" + str(path))
children = self.gather_rotation_candidates(path)
# Do we need to rotate anything out?
if len(children) <= max_items:
self.log(
"Path only has " + str(len(children)) + " items,"
+ " but needs " + str(max_items) + " for rotation"
+ "; Won't rotate this path."
)
return
#
purge_count = len(children) - max_items
self.log(
"Need to purge " + str(purge_count) + " items"
)
for purge_index in range(purge_count):
item_to_purge = self.pick_item_to_purge(children)
self.log("Purging item:", item_to_purge)
children.remove(item_to_purge)
def gather_rotation_candidates(self, path):
candidates = []
if "target-type" not in self.__config.keys():
raise Exception("Please provide the configuration key: target-type")
for item_name in os.listdir(path):
item_path = os.path.join(path, item_name)
if self.__config["target-type"] == "file":
if not os.path.isfile(item_path):
continue
elif self.__config["target-type"] == "directory":
if not os.path.isdir(item_path):
continue
else:
raise Exception("Configuration key \"target-type\" must be \"file\" or \"directory\"")
candidates.append(item_path)
return candidates
def pick_item_to_purge(self, items):
if "date-detection" not in self.__config.keys():
raise Exception("Please provide config key: \"date-detection\"")
detection = self.__config["date-detection"]
best_item = None
best_mtime = None
for item in items:
if detection == "file":
mtime = os.path.getmtime(item)
if best_mtime is None or mtime < best_mtime:
best_mtime = mtime
best_item = item
else:
raise Exception("Invalid value for \"date-detection\": " + str(detection))
return best_item
def main():