Force datetime to UTC if it's native

We always want the datetime object to be tz-aware, but certain Date:
header formats result in timezone-naive variants. For those cases, just
pretend it's UTC, as that's sufficiently accurate for our purposes.

Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/b4/__init__.py b/b4/__init__.py
index 12afe94..61fe542 100644
--- a/b4/__init__.py
+++ b/b4/__init__.py
@@ -827,6 +827,9 @@ class LoreMessage:
         else:
             # An email without a Date: field?
             self.date = datetime.datetime.now()
+        # Force it to UTC if it's naive
+        if self.date.tzinfo is None:
+            self.date = self.date.replace(tzinfo=datetime.timezone.utc)
 
         diffre = re.compile(r'^(---.*\n\+\+\+|GIT binary patch|diff --git \w/\S+ \w/\S+)', re.M | re.I)
         diffstatre = re.compile(r'^\s*\d+ file.*\d+ (insertion|deletion)', re.M | re.I)