Merge pull request #110 from andrewwhitehead/print-version

Add -v option to aca-py executable to print version

aries_cloudagent/commands/help.py

@@ -3,6 +3,8 @@
 from argparse import ArgumentParser
 from typing import Sequence
 
+from ..version import __version__
+
 
 def execute(argv: Sequence[str] = None):
     """Execute the help command."""
@@ -12,11 +14,21 @@ def execute(argv: Sequence[str] = None):
     subparsers = parser.add_subparsers()
     for cmd in available_commands():
         if cmd["name"] == "help":
+            parser.add_argument(
+                "-v",
+                "--version",
+                action="store_true",
+                help="print application version and exit",
+            )
             continue
         module = load_command(cmd["name"])
         subparser = subparsers.add_parser(cmd["name"], help=cmd["summary"])
         module.init_argument_parser(subparser)
-    parser.print_help()
+    args = parser.parse_args()
+    if args.version:
+        print(__version__)
+    else:
+        parser.print_help()
 
 
 if __name__ == "__main__":