[mod] main:args:template_path

source/main.py

@@ -72,9 +72,7 @@ def handle_value(
 	)
 	return (
 		file_read(value[len(options["indicator"]):])
-		if
+		if value.startswith(options["indicator"]) else
-		value.startswith(options["indicator"])
-		else
 		value
 	)	
 	
@@ -91,9 +89,7 @@ def data_from_file(
 			(
 				lambda content: (
 					_json.loads(content)
-					if
+					if path.endswith(".json") else
-					path.endswith(".json")
-					else
 					_yaml.safe_load(content)
 				)
 			) (file_read(path))
@@ -101,7 +97,7 @@ def data_from_file(
 	)
 	
 
-def data_from_arguments(
+def data_from_adhoc_arguments(
 	arguments
 ):
 	return dict(
@@ -125,7 +121,16 @@ def main(
 	argument_parser = _argparse.ArgumentParser(
 		prog = "coin",
 		formatter_class = _argparse.ArgumentDefaultsHelpFormatter,
-		description = "transforms an input string (stdin) by processing its placeholders; example: »echo '{{flowers}} are {{color}}' | coin -a flowers:roses -a color:red«",
+		description = "transforms a template string to its refined version by substituting its placeholders with concrete values; example: »echo '{{flowers}} are {{color}}' | coin -a flowers:roses -a color:red«",
+	)
+	argument_parser.add_argument(
+		"-t",
+		"--template-path",
+		dest = "template_path",
+		type = str,
+		metavar = "<template-path>",
+		default = None,
+		help = "default: read from stdin",
 	)
 	argument_parser.add_argument(
 		"-d",
@@ -137,12 +142,11 @@ def main(
 	)
 	argument_parser.add_argument(
 		"-a",
-		"--argument",
+		"--adhoc-argument",
 		type = str,
-		dest = "arguments",
+		dest = "adhoc_arguments",
 		action = "append",
-		default = None,
+		metavar = "<adhoc-argument-key>:<adhoc-argument-value>",
-		metavar = "<key>:<value>",
 		help = "prefixing <value> with '@' causes the value to be interpreted as the path to a text file, whose content shall be used",
 	)
 	argument_parser.add_argument(
@@ -170,11 +174,15 @@ def main(
 	args = argument_parser.parse_args()
 	
 	## exec
-	content_in = _sys.stdin.read()
+	content_in = (
+		_sys.stdin.read()
+		if (args.template_path is None) else
+		file_read(args.template_path)
+	)
 	data = (
 		data_from_file(args.data_path)
 		|
-		data_from_arguments(args.arguments)
+		data_from_adhoc_arguments(args.adhoc_arguments)
 	)
 	content_out = string_coin(
 		content_in,