add reading from stdin

start.py

@@ -3,11 +3,15 @@ import json
 import os
 import subprocess
 import logging
+import sys
 
 log = logging.getLogger(__name__)
 
 
-def change_service(path, cmd):
+def change_service(path, action):
+	cmd = ["docker-compose"] + action.split()
+	if path.endswith("/docker-compose.yml"):
+		path = path[:-len("/docker-compose.yml")]
 	r = subprocess.run(cmd, cwd=path)
 	log.info(f"processed {path}", extra={"path": path, "cmd": cmd, "returncode": r.returncode})
 
@@ -17,30 +21,32 @@ def load_json(config_file):
 		data = json.load(src)
 		return [os.path.join(base, service) for base in data for service in data[base]]
 
-
 def load_raw(config_file):
 	with open(config_file) as src:
 		return [line.strip() for line in src]
 
+def load_stdin(_):
+	for line in sys.stdin:
+		yield line.strip()
 
-config_types = {
-	"json": load_json,
-	"raw": load_raw
-}
+def get_loader(config_file):
+	if config_file.endswith(".json"):
+		return load_json
+	if "-" == config_file:
+		return load_stdin
+	return load_raw
 
-
-def apply(config_file, action, type):
-	cmd = ["docker-compose"] + action.split()
-	for path in config_types[type](config_file):
-		change_service(path, cmd)
+def apply(config_file, action):
+	load = get_loader(config_file)
+	for path in load(config_file):
+		change_service(path, action)
 
 
 if __name__ == "__main__":
 	logging.basicConfig(format="%(message)s (status %(returncode)s)", level=logging.INFO)
 	parser = argparse.ArgumentParser(description="Docker-compose Autostart")
-	parser.add_argument("config_file")
-	parser.add_argument("--type", "-t", default="raw", choices=config_types)
-	parser.add_argument("--action", "-a", default="up -d")
+	parser.add_argument("config_file", default="-", help="json file, plain text list or - for stdin")
+	parser.add_argument("--action", "-a", default="up -d", help="docker-compose action to apply, default: up -d")
 	args = parser.parse_args()
 
-	apply(args.config_file, args.action, args.type)
+	apply(args.config_file, args.action)