# HG changeset patch
# User Sean Farley <sean@farley.io>
# Date 1472865961 25200
#      Fri Sep 02 18:26:01 2016 -0700
# Node ID 9c15c89088fd57212a19e969d8de66491b66c974
# Parent  1fec6463922bba1193f3637b071bda88f2786cac
gitdirstate: only wrap for hg-git repos

Previously, if a user enables hg-git and in a non-git repo (i.e.
hg-only) they have a .gitignore, then hg-git will try to parse that. I
consider this a bug and a bad performance regression for what should be
a no-op.

diff --git a/hggit/__init__.py b/hggit/__init__.py
--- a/hggit/__init__.py
+++ b/hggit/__init__.py
@@ -208,7 +208,9 @@
     if not isinstance(repo, gitrepo.gitrepo):
 
         if (getattr(dirstate, 'rootcache', False) and
-            (not ignoremod or getattr(ignore, 'readpats', False))):
+            (not ignoremod or getattr(ignore, 'readpats', False)) and
+            hgutil.safehasattr(repo, 'join') and
+            os.path.exists(repo.join('git'))):
             # only install our dirstate wrapper if it has a hope of working
             import gitdirstate
             if ignoremod:
diff --git a/tests/test-gitignore.t b/tests/test-gitignore.t
--- a/tests/test-gitignore.t
+++ b/tests/test-gitignore.t
@@ -5,6 +5,11 @@
 
   $ hg init
 
+We should only read .gitignore files in a hg-git repo (i.e. one with .hg/git
+directory) otherwise, a rogue .gitignore could slow down a hg-only repo
+
+  $ mkdir .hg/git
+
   $ touch foo
   $ touch foobar
   $ touch bar