git-remote-testgit: import non-HEAD refs

Upon receiving an "import" command, the testgit remote
helper would ignore the ref asked for by git and generate a
fast-export stream based on HEAD. Instead, we should
actually give git the ref it asked for.

This requires adding a new parameter to the export_repo
method in the remote-helpers python library, which may be
used by code outside of git.git. We use a default parameter
so that callers without the new parameter will get the same
behavior as before.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Sverre Rabbelier <srabbelier@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-remote-testgit.py

@@ -122,7 +122,7 @@ def do_import(repo, args):
         die("Need gitdir to import")
 
     repo = update_local_repo(repo)
-    repo.exporter.export_repo(repo.gitdir)
+    repo.exporter.export_repo(repo.gitdir, args)
 
 
 def do_export(repo, args):

git_remote_helpers/git/exporter.py

@@ -15,7 +15,7 @@ class GitExporter(object):
 
         self.repo = repo
 
-    def export_repo(self, base):
+    def export_repo(self, base, refs=None):
         """Exports a fast-export stream for the given directory.
 
         Simply delegates to git fast-epxort and pipes it through sed
@@ -23,8 +23,13 @@ class GitExporter(object):
         default refs/heads. This is to demonstrate how the export
         data can be stored under it's own ref (using the refspec
         capability).
+
+        If None, refs defaults to ["HEAD"].
         """
 
+        if not refs:
+            refs = ["HEAD"]
+
         dirname = self.repo.get_base_path(base)
         path = os.path.abspath(os.path.join(dirname, 'testgit.marks'))
 
@@ -42,7 +47,7 @@ class GitExporter(object):
         if os.path.exists(path):
             args.append("--import-marks=" + path)
 
-        args.append("HEAD")
+        args.extend(refs)
 
         p1 = subprocess.Popen(args, stdout=subprocess.PIPE)
 

t/t5800-remote-helpers.sh

@@ -85,7 +85,7 @@ test_expect_success 'pushing remote local repo' '
 	compare_refs clone HEAD server HEAD
 '
 
-test_expect_failure 'fetch new branch' '
+test_expect_success 'fetch new branch' '
 	(cd public &&
 	 git checkout -b new &&
 	 echo content >>file &&