From: W. Trevor King <wking@drexel.edu>
Date: Wed, 20 Jan 2010 12:19:56 +0000 (-0500)
Subject: Add better help message on COMMAND-less be call
X-Git-Tag: 1.0.0~59^2~46^2~19
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=34b5bbd98e420672ecce64ba085bbf1a4205267e;p=be.git

Add better help message on COMMAND-less be call
---

diff --git a/libbe/ui/command_line.py b/libbe/ui/command_line.py
index 7ba6cf5..17f7b35 100644
--- a/libbe/ui/command_line.py
+++ b/libbe/ui/command_line.py
@@ -285,7 +285,14 @@ def main():
     except CallbackExit:
         return 0
     except libbe.command.UserError, e:
-        print >> ui.io.stdout, 'ERROR:\n', e
+        if str(e).endswith('COMMAND'):
+            # no command given, print usage string
+            print >> ui.io.stdout, 'ERROR:'
+            print >> ui.io.stdout, be.usage(), '\n', e
+            print >> ui.io.stdout, 'For example, try'
+            print >> ui.io.stdout, '  be help'
+        else:
+            print >> ui.io.stdout, 'ERROR:\n', e
         return 1
 
     command_name = args.pop(0)