From 02494c5e155a7444bc492ef6352793188e59df1e Mon Sep 17 00:00:00 2001
From: Pierre-Yves Chibon <pingou@pingoured.fr>
Date: Sep 07 2017 09:16:58 +0000
Subject: Catch exception raised when accessing the head of the repo


When trying to diff a branch against master when master does not exist
but the repo is not empty, pygit2 may raise an exception. Let's catch
it and set the compare_branch to None as if the repo was empty.

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>

---

diff --git a/pagure/internal/__init__.py b/pagure/internal/__init__.py
index c4637fe..f092a68 100644
--- a/pagure/internal/__init__.py
+++ b/pagure/internal/__init__.py
@@ -272,7 +272,10 @@ def get_pull_request_ready_branch():
     if not repo_obj.is_empty and repo_obj.listall_branches() > 1:
         if not parent_repo_obj.is_empty \
                 and not parent_repo_obj.head_is_unborn:
-            compare_branch = repo_obj.head.shorthand
+            try:
+                compare_branch = repo_obj.head.shorthand
+            except pygit2.GitError:
+                compare_branch = None
         else:
             compare_branch = None