new file mode 100644
--- /dev/null
+++ b/git_handler.py
@@ -0,0 +1,80 @@
+import os, errno, sys
+import dulwich
+from dulwich.repo import Repo
+from dulwich.client import SimpleFetchGraphWalker
+from hgext import bookmarks
+from mercurial.i18n import _
+
+class GitHandler(object):
+    
+    def __init__(self, dest_repo, ui):
+        self.repo = dest_repo
+        self.ui = ui
+        git_dir = os.path.join(self.repo.path, 'git')
+        self.git = Repo(git_dir)
+        
+    def fetch(self, git_url):
+        self.ui.status(_("fetching from git url: " + git_url + "\n"))
+        self.export_git_objects()
+        self.fetch_pack(git_url)
+        self.import_git_objects()
+    
+    def fetch_pack(self, git_url):
+        client, path = self.get_transport_and_path(git_url)
+        graphwalker = SimpleFetchGraphWalker(self.git.heads().values(), self.git.get_parents)
+        f, commit = self.git.object_store.add_pack()
+        try:
+            determine_wants = self.git.object_store.determine_wants_all
+            refs = client.fetch_pack(path, determine_wants, graphwalker, f.write, sys.stdout.write)
+            f.close()
+            commit()
+            self.git.set_refs(refs)
+        except:
+            f.close()
+            raise    
+
+    def import_git_objects(self):
+        self.ui.status(_("importing Git objects into Hg\n"))
+        # import heads as remote references
+        todo = []
+        done = set()
+        convert_list = []
+        for head, sha in self.git.heads().iteritems():
+            todo.append(sha)
+        while todo:
+            sha = todo.pop()
+            assert isinstance(sha, str)
+            if sha in done:
+                continue
+            done.add(sha)
+            commit = self.git.commit(sha)
+            convert_list.append(commit)
+            todo.extend([p for p in commit.parents if p not in done])
+        
+        convert_list.sort(cmp=lambda x,y: x.commit_time-y.commit_time)
+        for commit in convert_list:
+            print "commit: %s" % sha
+            self.import_git_commit(commit)
+    
+        print bookmarks.parse(self.repo)
+
+    def import_git_commit(self, commit):
+        # check that parents are all in Hg, or no parents
+        print commit.parents
+        pass
+
+    def export_git_objects(self):
+        pass
+
+    def check_bookmarks(self):
+        if self.ui.config('extensions', 'hgext.bookmarks') is not None:
+            print "YOU NEED TO SETUP BOOKMARKS"
+
+    def get_transport_and_path(self, uri):
+        from dulwich.client import TCPGitClient, SSHGitClient, SubprocessGitClient
+        for handler, transport in (("git://", TCPGitClient), ("git+ssh://", SSHGitClient)):
+            if uri.startswith(handler):
+                host, path = uri[len(handler):].split("/", 1)
+                return transport(host), "/"+path
+        # if its not git or git+ssh, try a local url..
+        return SubprocessGitClient(), uri