From a5cdd3236ed212c0f7b2a95d9bad35730b18eaba Mon Sep 17 00:00:00 2001
From: Loic Dachary <ldachary@redhat.com>
Date: Thu, 29 Oct 2015 11:59:08 +0900
Subject: [PATCH] suite: add the git_ls_remote function

It was inlined and used as a fallback when not extracting the ceph hash
from gitbuilders.

Signed-off-by: Loic Dachary <ldachary@redhat.com>
---
 teuthology/suite.py           |  8 ++++++++
 teuthology/test/test_suite.py | 26 ++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/teuthology/suite.py b/teuthology/suite.py
index 615a880c9d..5b77bd6279 100644
--- a/teuthology/suite.py
+++ b/teuthology/suite.py
@@ -464,6 +464,14 @@ def package_version_for_hash(hash, kernel_flavor='basic',
     if resp.ok:
         return resp.text.strip()
 
+def git_ls_remote(project, branch, project_owner='ceph'):
+    ls_remote = subprocess.check_output(
+        "git ls-remote " + build_git_url(project, project_owner) + " " +
+        branch, shell=True).split()
+    if ls_remote:
+        return ls_remote[0]
+    else:
+        return None
 
 def build_git_url(project, project_owner='ceph'):
     """
diff --git a/teuthology/test/test_suite.py b/teuthology/test/test_suite.py
index fa4bc8684a..abf7a87e35 100644
--- a/teuthology/test/test_suite.py
+++ b/teuthology/test/test_suite.py
@@ -7,6 +7,26 @@ from teuthology import suite
 from scripts.suite import main
 from teuthology.config import config
 
+import os
+import pytest
+import tempfile
+
+@pytest.fixture
+def git_repository(request):
+    d = tempfile.mkdtemp()
+    os.system("""
+    cd {d}
+    git init
+    touch A
+    git config user.email 'you@example.com'
+    git config user.name 'Your Name'
+    git add A
+    git commit -m 'A' A
+    """.format(d=d))
+    def fin():
+        os.system("rm -fr " + d)
+    request.addfinalizer(fin)
+    return d
 
 class TestSuiteOffline(object):
     def test_name_timestamp_passed(self):
@@ -156,6 +176,12 @@ class TestSuiteOffline(object):
         m_get_ceph_git_url.return_value = url + '.git'
         assert url == suite.build_git_url('ceph')
 
+    @patch('teuthology.config.TeuthologyConfig.get_ceph_git_url')
+    def test_git_ls_remote(self, m_get_ceph_git_url, git_repository):
+        m_get_ceph_git_url.return_value = git_repository
+        assert None == suite.git_ls_remote('ceph', 'nobranch')
+        assert suite.git_ls_remote('ceph', 'master') is not None
+
 class TestFlavor(object):
     def test_get_install_task_flavor_bare(self):
         config = dict(
-- 
2.39.5