Add version.

Author: yxd-hde

lambda_local/__init__.py

@@ -9,13 +9,20 @@
 import argparse
 import sys
 from multiprocessing import Process
+import pkg_resources
 
 from .main import run
 
 
+__version__ = pkg_resources.require("python-lambda-local")[0].version
+
+
 def main():
     args = parse_args()
 
+    print(args.version)
+    return
+
     p = Process(target=run, args=(args,))
     p.start()
     p.join()
@@ -27,23 +34,28 @@ def parse_args():
     parser = argparse.ArgumentParser(description="Run AWS Lambda function" +
                                      " written in Python on local machine.")
     parser.add_argument("file", metavar="FILE", type=str,
-                        help="Lambda function file name")
+                        help="lambda function file name")
     parser.add_argument("event", metavar="EVENT", type=str,
-                        help="Event data file name.")
+                        help="event data file name")
     parser.add_argument("-l", "--library", metavar="LIBRARY_PATH",
-                        type=str, help="Path of 3rd party libraries.")
+                        type=str, help="path of 3rd party libraries")
     parser.add_argument("-f", "--function", metavar="HANDLER_FUNCTION",
                         type=str, default="handler",
-                        help="Lambda function handler name. \
-Default: \"handler\".")
+                        help="lambda function handler name, \
+default: \"handler\"")
     parser.add_argument("-t", "--timeout", metavar="TIMEOUT", type=int,
                         default=3,
-                        help="Seconds until lambda function timeout. \
-Default: 3")
+                        help="seconds until lambda function timeout, \
+default: 3")
     parser.add_argument("-a", "--arn-string", metavar="ARN_STRING", type=str,
-                        default="", help="arn string for function")
+                        default="", help="ARN string for lambda function")
     parser.add_argument("-v", "--version-name", metavar="VERSION_NAME",
-                        type=str, default="", help="function version name")
+                        type=str, default="",
+                        help="lambda function version name")
+
+    parser.add_argument("--version", action="version",
+                        version="%(prog)s " + __version__,
+                        help="print the version of python-lambda-local and exit")
 
     return parser.parse_args()