From 01dbae187f0bc75db0719c3d55abc1140d3a2ccf Mon Sep 17 00:00:00 2001
From: Siddharth Agarwal <sid0@fb.com>
Date: Fri, 6 Mar 2015 10:58:33 -0800
Subject: [PATCH] git_handler: reintroduce compatibility with dulwich 0.9.4
 (issue124)

It's the version that ships with the latest Ubuntu LTS as of this writing.
---
 hggit/git_handler.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/hggit/git_handler.py b/hggit/git_handler.py
index 436236dd89..d11bf6c221 100644
--- a/hggit/git_handler.py
+++ b/hggit/git_handler.py
@@ -1519,7 +1519,16 @@ class GitHandler(object):
             opener = urllib2.build_opener(auth_handler)
             useragent = 'git/20x6 (hg-git ; uses dulwich and hg ; like git-core)'
             opener.addheaders = [('User-Agent', useragent)]
-            return client.HttpGitClient(uri, opener=opener), uri
+            try:
+                return client.HttpGitClient(uri, opener=opener), uri
+            except TypeError as e:
+                if e.message.find("unexpected keyword argument 'opener'") >= 0:
+                    # Dulwich 0.9.4, which is the latest version that ships with
+                    # Ubuntu 14.04, doesn't support the 'opener' keyword. Try
+                    # without authentication.
+                    return client.HttpGitClient(uri), uri
+                else:
+                    raise
 
         # if its not git or git+ssh, try a local url..
         return client.SubprocessGitClient(), uri