Support for printing a diff of proposed changes instead of modifying the file

1 files changed, 2 insertions, 0 deletions

diff --git a/scripts/isort b/scripts/isort
index a70b4ddf..8640d99d 100755
--- a/scripts/isort
+++ b/scripts/isort
@@ -41,6 +41,8 @@ parser.add_argument('-c', '--check-only', action='store_true', default=False, de
                          'the file.')
 parser.add_argument('-sd', '--section-default', dest='default_section',
                     help='Sets the default section for imports (by default FIRSTPARTY) options: ' + str(SECTION_NAMES))
+parser.add_argument('-df', '--diff', dest='show_diff', default=False, action='store_true',
+                    help="Prints a diff of all the changes isort would make to a file, instead of changing it in place")
 parser.add_argument('-v', '--version', action='version', version='isort {0}'.format(__version__))
 
 arguments = dict((key, value) for (key, value) in itemsview(vars(parser.parse_args())) if value)