misc-utilities/mikes-backup-rotator
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Upgrade configstuffs

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Trying to add support for:

- Multiple configs in one run
- Multiple config path arguments
- Allow a config path to be a directory of config files
This commit is contained in:
Mike 2019-03-13 01:35:34 -07:00
parent 918784bd00
commit e5ea0dee9a
1 changed files with 109 additions and 31 deletions
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136
backup-rotator
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@ -12,16 +12,26 @@ class BackupRotator:
def __init__(self):
self.__config = None
self.__config_path = None
self.__dry_run = False
self.__configs = []
self.__config_paths = []
self.__calculated_actions = []
def run(self):
self.log("Begin")
self.consume_arguments()
self.consume_config(self.__config_path)
self.consume_configs(self.__config_paths)
self.rotate_paths()
# Rotate once per config
for config_index in range(len(self.__configs)):
#
config = self.__configs[config_index]
#
self.log("Rotating for config " + str(config_index + 1) + " of " + str(len(self.__configs)), config["__path"])
self.do_rotate(config)
@staticmethod
def current_time():
@ -42,13 +52,20 @@ class BackupRotator:
def consume_arguments(self):
self.__config_paths = []
for i in range(1, len(sys.argv)):
arg = sys.argv[i]
if arg == "--config":
i, self.__config_path = self.consume_argument_companion(i)
print("Found config path:", self.__config_path)
i, one_path = self.consume_argument_companion(i)
self.__config_paths.append(one_path)
print("Found config path argument:", one_path)
elif arg == "--dry-run":
self.__dry_run = True
print("Activating global dry-run mode")
@staticmethod
def consume_argument_companion(arg_index):
@ -59,34 +76,64 @@ class BackupRotator:
return companion_index, sys.argv[companion_index]
def consume_config(self, path=None):
def consume_configs(self, paths: list=None):
if path is None:
if paths is None:
raise Exception("Auto-finding of config file not implemented")
f = open(path)
self.__config = yaml.load(f)
# Use each config path
for path in paths:
# If this is a single path
if os.path.isfile(path):
self.consume_config(path)
# If this is a directory
elif os.path.isdir(path):
# Iterate over each file inside
for file_name in os.listdir(path):
self.consume_config(os.path.join(path, file_name))
def consume_config(self, path: str):
# Open the file
f = open(path)
if not f:
raise Exception("Unable to open config file: " + path)
# Parse
config = yaml.load(f)
# Add its own path
config["__path"] = path
# Consume to internal
self.__configs.append(config)
self.log("Consumed config from path:", path)
def rotate_paths(self):
def do_rotate(self, config):
self.log("Begin rotating " + str(len(self.__config["paths"])) + " paths")
for path in self.__config["paths"]:
self.rotate_path(path)
self.rotate_paths(config)
def rotate_path(self, path):
def rotate_paths(self, config):
self.log("Begin rotating " + str(len(config["paths"])) + " paths")
for path in config["paths"]:
self.rotate_path(config, path)
def rotate_path(self, config, path):
self.log("Rotating path", path)
if "maximum-items" not in self.__config:
if "maximum-items" not in config:
raise Exception("Please provide config key: \"maximum-items\"")
max_items = self.__config["maximum-items"]
max_items = config["maximum-items"]
if not os.path.isdir(path):
raise Exception("Path should be a directory:" + str(path))
children = self.gather_rotation_candidates(path)
children = self.gather_rotation_candidates(config, path)
# Do we need to rotate anything out?
if len(children) <= max_items:
@ -104,31 +151,35 @@ class BackupRotator:
)
for purge_index in range(purge_count):
item_to_purge = self.pick_item_to_purge(children)
#
item_to_purge = self.pick_item_to_purge(config, children)
children.remove(item_to_purge)
self.log("Purging item:", item_to_purge)
#
if os.path.isfile(item_to_purge):
os.remove(item_to_purge)
self.remove_file(config, item_to_purge)
elif os.path.isdir(item_to_purge):
shutil.rmtree(item_to_purge)
self.remove_directory(config, item_to_purge)
else:
raise Exception("Don't know how to remove this item: " + str(item_to_purge))
def gather_rotation_candidates(self, path):
@staticmethod
def gather_rotation_candidates(config, path):
candidates = []
if "target-type" not in self.__config.keys():
if "target-type" not in 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 config["target-type"] == "file":
if not os.path.isfile(item_path):
continue
elif self.__config["target-type"] == "directory":
elif config["target-type"] == "directory":
if not os.path.isdir(item_path):
continue
else:
@ -138,12 +189,13 @@ class BackupRotator:
return candidates
def pick_item_to_purge(self, items):
@staticmethod
def pick_item_to_purge(config, items):
if "date-detection" not in self.__config.keys():
if "date-detection" not in config.keys():
raise Exception("Please provide config key: \"date-detection\"")
detection = self.__config["date-detection"]
detection = config["date-detection"]
best_item = None
best_ctime = None
for item in items:
@ -158,6 +210,32 @@ class BackupRotator:
return best_item
def remove_file(self, config, file_path):
if not os.path.isfile(file_path):
raise Exception("Tried to remove a file, but this path isn't a file: " + str(file_path))
if self.__dry_run:
self.log("Won't purge file during global-level dry run: ", file_path)
elif "dry-run" in config.keys() and config["dry-run"] is True:
self.log("Won't purge file during config-level dry run: ", file_path)
else:
self.log("Purging file:", file_path)
os.remove(file_path)
def remove_directory(self, config, dir_path):
if not os.path.isdir(dir_path):
raise Exception("Tried to remove a directory, but this path isn't a directory: " + str(dir_path))
if self.__dry_run:
self.log("Won't purge directory during global-level dry run: ", dir_path)
elif "dry-run" in config.keys() and config["dry-run"] is True:
self.log("Won't purge directory during config-level dry run: ", dir_path)
else:
self.log("Purging directory:", dir_path)
shutil.rmtree(dir_path)
def main():