From 82bcd63f34947751ea1bf997f14f17d09583231b Mon Sep 17 00:00:00 2001
From: Adrian Sampson <adrian@radbox.org>
Date: Tue, 24 Jul 2012 15:23:27 -0700
Subject: [PATCH] reasonable error message for "beet help <unknown>"

---
 beets/ui/__init__.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/beets/ui/__init__.py b/beets/ui/__init__.py
index 44372b9b8..0b7cbcae2 100644
--- a/beets/ui/__init__.py
+++ b/beets/ui/__init__.py
@@ -660,6 +660,8 @@ class SubcommandsOptionParser(optparse.OptionParser):
                 # particular
                 cmdname = subargs[0]
                 helpcommand = self._subcommand_for_name(cmdname)
+                if not helpcommand:
+                    self.error('no command named {0}'.format(cmdname))
                 helpcommand.parser.print_help()
                 self.exit()
             else: