Add patch older-git: skip worktree list test against older versions of git.

debian/changelog

@@ -1,3 +1,10 @@
+dulwich (0.16.1-2) UNRELEASED; urgency=medium
+
+  * Add patch older-git: skip worktree list test against older versions
+    of git.
+
+ -- Jelmer Vernooij <jelmer@debian.org>  Mon, 26 Dec 2016 11:24:46 +0000
+
 dulwich (0.16.1-1) unstable; urgency=medium
 
   * New upstream release.

debian/patches/older-git

@@ -0,0 +1,27 @@
+commit cad0484f5293c8e95673ab2744680dcc977099b0
+Author: Jelmer Vernooij <jelmer@jelmer.uk>
+Date:   Mon Dec 26 11:20:17 2016 +0000
+
+    Only run 'git worktree list' when it is available.
+
+diff --git a/dulwich/tests/compat/test_repository.py b/dulwich/tests/compat/test_repository.py
+index ee19ae6..c39ff84 100644
+--- a/dulwich/tests/compat/test_repository.py
++++ b/dulwich/tests/compat/test_repository.py
+@@ -34,6 +34,7 @@ from dulwich.repo import (
+     Repo,
+     )
+ from dulwich.tests.compat.utils import (
++    require_git_version,
+     rmtree_ro,
+     run_git_or_fail,
+     CompatTestCase,
+@@ -172,6 +172,8 @@ class WorkingTreeTestCase(ObjectStoreTestCase):
+         return worktrees
+ 
+     def test_git_worktree_list(self):
++        # 'git worktree list' was introduced in 2.7.0
++        require_git_version((2, 7, 0))
+         output = run_git_or_fail(['worktree', 'list'], cwd=self._repo.path)
+         worktrees = self._parse_worktree_list(output)
+         self.assertEqual(len(worktrees), self._number_of_working_tree)

debian/patches/series

@@ -0,0 +1 @@
+older-git

dulwich/tests/compat/test_repository.py

@@ -34,6 +34,7 @@ from dulwich.repo import (
     Repo,
     )
 from dulwich.tests.compat.utils import (
+    require_git_version,
     rmtree_ro,
     run_git_or_fail,
     CompatTestCase,
@@ -172,6 +173,8 @@ class WorkingTreeTestCase(ObjectStoreTestCase):
         return worktrees
 
     def test_git_worktree_list(self):
+        # 'git worktree list' was introduced in 2.7.0
+        require_git_version((2, 7, 0))
         output = run_git_or_fail(['worktree', 'list'], cwd=self._repo.path)
         worktrees = self._parse_worktree_list(output)
         self.assertEqual(len(worktrees), self._number_of_working_tree)