Ensure "git init" doesn't write to stdout, and confuse a push.

The repository autocreation functionality ends up sending the
stdout to the client side, and there a very confused git push
can't make any sense of the protocol.

gitosis/repository.py

@@ -1,6 +1,7 @@
 import os
 import re
 import subprocess
+import sys
 
 from gitosis import util
 
@@ -28,6 +29,7 @@ def init(
     returncode = subprocess.call(
         args=args,
         cwd=path,
+        stdout=sys.stderr,
         close_fds=True,
         env=dict(GIT_DIR='.'),
         )

gitosis/test/test_serve.py

@@ -189,3 +189,32 @@ def test_push_inits_if_needed_existsWithExtension():
     # it.. having HEAD implies serve ran git init, which is supposed
     # to be unnecessary here
     eq(os.listdir(os.path.join(tmp, 'foo.git')), [])
+
+def test_push_inits_no_stdout_spam():
+    # git init has a tendency to spew to stdout, and that confuses
+    # e.g. a git push
+    tmp = util.maketemp()
+    cfg = RawConfigParser()
+    cfg.add_section('gitosis')
+    cfg.set('gitosis', 'repositories', tmp)
+    cfg.add_section('group foo')
+    cfg.set('group foo', 'members', 'jdoe')
+    cfg.set('group foo', 'writable', 'foo')
+    old_stdout = os.dup(1)
+    try:
+        new_stdout = os.tmpfile()
+        os.dup2(new_stdout.fileno(), 1)
+        serve.serve(
+            cfg=cfg,
+            user='jdoe',
+            command="git-receive-pack 'foo'",
+            )
+    finally:
+        os.dup2(old_stdout, 1)
+        os.close(old_stdout)
+    new_stdout.seek(0)
+    got = new_stdout.read()
+    new_stdout.close()
+    eq(got, '')
+    eq(os.listdir(tmp), ['foo.git'])
+    assert os.path.isfile(os.path.join(tmp, 'foo.git', 'HEAD'))