--- a/bin/listpackages.py	Fri Mar 06 19:22:53 2009 +0000
+++ b/bin/listpackages.py	Fri Mar 06 19:57:04 2009 +0000
@@ -48,14 +48,19 @@
 
     return revision, rulesrev
 
+def format_revision(main_rev, rules_rev):
+    formatted = str(main_rev)
+    if rules_rev is not None:
+        formatted += "-" + str(rules_rev)
+    return formatted
+
 
 def list_track_packages(track, revision, source, binary):
     main_rev, rules_rev = revision
 
     revisions = track.get_revisions()
-    if not revisions:
-        print >>sys.stderr, "No revisions have been packaged"
-        sys.exit(1)
+    if not revisions and main_rev is None:
+        return
 
     if main_rev is None:
         revpkg = revisions[-1]
@@ -77,7 +82,7 @@
             for filename in revpkg.list_binary_files():
                 print filename
     else:
-        print >>sys.stderr, "No revision", repr(revision)
+        print >>sys.stderr, "No revision", format_revision(main_rev, rules_rev)
         sys.exit(1)
 
 def list_packages(config_file, trackname, revision, source, binary):

--- a/test/test_listpackages.py	Fri Mar 06 19:22:53 2009 +0000
+++ b/test/test_listpackages.py	Fri Mar 06 19:57:04 2009 +0000
@@ -100,6 +100,28 @@
             raise self.failureException("\n" + "".join(diff))
 
 
+class TestListPackagesNoPackages(ListPackagesTest):
+
+    track_files = []
+
+    def test_listpackages_noargs(self):
+        # if nothing has been packaged yet, the output is simply empty
+        self.check_cmd(["--source"], "")
+
+    def test_listpackages_revision(self):
+        # if nothing has been packaged yet, the output is simply empty
+        self.assertEquals(self.run_command(["--source", "--revision=12345",
+                                            "--track=kdepim"],
+                                           expected_exit_code=1),
+                          "No revision 12345\n")
+
+    def test_listpackages_revision_rulesrev(self):
+        # if nothing has been packaged yet, the output is simply empty
+        self.assertEquals(self.run_command(["--source", "--revision=12345-321",
+                                            "--track=kdepim"],
+                                           expected_exit_code=1),
+                          "No revision 12345-321\n")
+
 class TestListPackagesTrackNoRevision(ListPackagesTest):
 
     track_files = [package_track_files("kdepim", "1.0.1",