Fix "stg clean" when stack is empty

[stgit] / stgit / commands / clean.py

diff --git a/stgit/commands/clean.py b/stgit/commands/clean.py
index efd85c2..baa4a54 100644 (file)
--- a/stgit/commands/clean.py
+++ b/stgit/commands/clean.py
@@ -24,7 +24,11 @@ from stgit import stack, git
 
 
 help = 'delete the empty patches in the series'
-usage = """%prog [options]"""
+usage = """%prog [options]
+
+Delete the empty patches in the whole series or only those applied or
+unapplied. A patch is considered empty if the two commit objects
+representing its boundaries refer to the same tree object."""
 
 options = [make_option('-a', '--applied',
                        help = 'delete the empty applied patches',
@@ -61,7 +65,8 @@ def func(parser, options, args):
 
     if options.applied:
         applied = crt_series.get_applied()
-        crt_series.pop_patch(applied[0])
+        if applied != []:
+            crt_series.pop_patch(applied[0])
         __delete_empty(applied, True)
 
     if options.unapplied: