Upgrade configstuffs

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

backup-rotator

@@ -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):
-	
-		if path is None:
+	def consume_configs(self, paths: list=None):
+		
+		if paths is None:
 			raise Exception("Auto-finding of config file not implemented")
 		
+		# 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)
-		self.__config = yaml.load(f)
+		if not f:
+			raise Exception("Unable to open config file: " + path)
 		
-		self.log("Consumed config from path: ", path)
-	
-	def rotate_paths(self):
+		# Parse
+		config = yaml.load(f)
 		
-		self.log("Begin rotating " + str(len(self.__config["paths"])) + " paths")
-		for path in self.__config["paths"]:
-			self.rotate_path(path)
+		# Add its own path
+		config["__path"] = path
+		
+		# Consume to internal
+		self.__configs.append(config)
+		self.log("Consumed config from path:", path)
 	
-	def rotate_path(self, path):
+	def do_rotate(self, config):
+	
+		self.rotate_paths(config)
+	
+	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:
@@ -157,6 +209,32 @@ class BackupRotator:
 				raise Exception("Invalid value for \"date-detection\": " + str(detection))
 		
 		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():