# HG changeset patch
# User Kevin Bullock <kbullock@ringworld.org>
# Date 1319213443 18000
# Node ID 67e92d29ecb50ceb38e22e7f19dfa13d99088ce0
# Parent  8ae2900d6d9b47486dbb8c9c21bb0d425680eb82
import: abort usefully if no patch name given

diff -r 8ae2900d6d9b -r 67e92d29ecb5 mercurial/commands.py
--- a/mercurial/commands.py	Fri Oct 21 14:15:58 2011 +0200
+++ b/mercurial/commands.py	Fri Oct 21 11:10:43 2011 -0500
@@ -3356,7 +3356,7 @@
      _('use any branch information in patch (implied by --exact)'))] +
     commitopts + commitopts2 + similarityopts,
     _('[OPTION]... PATCH...'))
-def import_(ui, repo, patch1, *patches, **opts):
+def import_(ui, repo, patch1=None, *patches, **opts):
     """import an ordered set of patches
 
     Import a list of patches and commit them individually (unless
@@ -3418,6 +3418,10 @@
 
     Returns 0 on success.
     """
+
+    if not patch1:
+        raise util.Abort(_('need at least one patch to import'))
+
     patches = (patch1,) + patches
 
     date = opts.get('date')
diff -r 8ae2900d6d9b -r 67e92d29ecb5 tests/test-import.t
--- a/tests/test-import.t	Fri Oct 21 14:15:58 2011 +0200
+++ b/tests/test-import.t	Fri Oct 21 11:10:43 2011 -0500
@@ -10,6 +10,11 @@
   $ echo line 2 >> a/a
   $ hg --cwd a ci -u someone -d '1 0' -m'second change'
 
+import with no args:
+
+  $ hg --cwd a import
+  abort: need at least one patch to import
+  [255]
 
 generate patches for the test