Add support for --diff-filename when using --repository-url.

This change allows --diff-filename to be used with --repository-url. This
can be used to submit a diff outside of a working checkout.

Patch by Luke Robison.
Reviewed at http://reviews.reviewboard.org/r/1393/

2 files changed, 9 insertions, 4 deletions

diff --git a/AUTHORS b/AUTHORS
index 88c271e..f90ad89 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -16,6 +16,7 @@ Contributors:
 	* Jeremy Bettis
 	* Lepton Wu
 	* Luke Lu
+	* Luke Robison
 	* Matthew Woehlke
 	* Mike Crute
 	* Paul Scott
diff --git a/rbtools/postreview.py b/rbtools/postreview.py
index 3022726..e8ea416 100755
--- a/rbtools/postreview.py
+++ b/rbtools/postreview.py
@@ -2607,7 +2607,8 @@ def parse_options(args):
                       dest="repository_url", default=None,
                       help="the url for a repository for creating a diff "
                            "outside of a working copy (currently only supported "
-                           "by Subversion).  Requires --revision-range")
+                           "by Subversion). Requires either --revision-range"
+                           "or --diff-filename options")
     parser.add_option("-d", "--debug",
                       action="store_true", dest="debug", default=DEBUG,
                       help="display debug output")
@@ -2648,9 +2649,12 @@ def parse_options(args):
                              options.testing_file)
             sys.exit(1)
 
-    if options.repository_url and not options.revision_range:
-        sys.stderr.write("The --repository-url option requires the "
-                         "--revision-range option.\n")
+    if (options.repository_url and
+        not options.revision_range and
+        not options.diff_filename):
+        sys.stderr.write("The --repository-url option requires either the "
+                         "--revision-range option or the --diff-filename "
+                         "option.\n")
         sys.exit(1)
 
     return args