[PATCH v2] Fix CRLF newlines upon submission changes

[vkabatov at redhat.com]

From: Veronika Kabatova <vkabatov at redhat.com>

After changing submission via admin interface, CRLF newlines are
suddenly present in the body. Replace them back to '\n'.

The issue was found after modifying submission via admin interface
using Python 2 and downloading the respective mbox file (git choked on
downloaded patch because of malformed line endings). Python 3's mail
module uses '\n' internally so the problem doesn't manifest there, but
the content received by Django/JS is still saved in the database with
CRLF line endings which shouldn't be there.

Signed-off-by: Veronika Kabatova <vkabatov at redhat.com>
---
Changes since v1: add comment to explain reasoning in code
---
 patchwork/models.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/patchwork/models.py b/patchwork/models.py
index 3bf7c72..a8bb015 100644
--- a/patchwork/models.py
+++ b/patchwork/models.py
@@ -328,6 +328,14 @@ class EmailMixin(models.Model):
         return ''.join([match.group(0) + '\n' for match in
                         self.response_re.finditer(self.content)])
 
+    def save(self, *args, **kwargs):
+        # Modifying a submission via admin interface changes '\n' newlines in
+        # message content to '\r\n'. We need to fix them to avoid problems,
+        # especially as git complains about malformed patches when PW runs
+        # on PY2
+        self.content = self.content.replace('\r\n', '\n')
+        super(EmailMixin, self).save(*args, **kwargs)
+
     class Meta:
         abstract = True
 
-- 
2.13.6