[PATCH] receive-pack: Create a HEAD ref for ref namespace

["Johannes Löthberg" <johannes@kyriasis.com>]

Each ref namespace have their own separate branches, tags, and HEAD, so
when pushing to a namespace we need to make sure that there exists a
HEAD ref for the namespace, otherwise you will not be able to check out
the repo after cloning from a namespace
---

So, I have absolutely no clue where this should actually be put, so I 
just put it where it fit for now.

Any comments on where to put it, or comments on the patch in general?

 builtin/receive-pack.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 5292bb5..c189838 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -864,7 +864,9 @@ static const char *update(struct command *cmd, struct shallow_info *si)
 {
 	const char *name = cmd->ref_name;
 	struct strbuf namespaced_name_buf = STRBUF_INIT;
-	const char *namespaced_name, *ret;
+	struct strbuf namespaced_head_buf = STRBUF_INIT;
+	const char *namespaced_name, *ret, *namespace;
+	const char *namespaced_head_path;
 	unsigned char *old_sha1 = cmd->old_sha1;
 	unsigned char *new_sha1 = cmd->new_sha1;
 
@@ -981,6 +983,14 @@ static const char *update(struct command *cmd, struct shallow_info *si)
 		return NULL; /* good */
 	}
 	else {
+		namespace = get_git_namespace();
+		if (strcmp(namespace, "refs/namespaces/")) {
+			strbuf_addf(&namespaced_head_buf, "%s%s", namespace, "HEAD");
+			namespaced_head_path = strbuf_detach(&namespaced_head_buf, NULL);
+
+			create_symref(namespaced_head_path, namespaced_name, NULL);
+		}
+
 		struct strbuf err = STRBUF_INIT;
 		if (shallow_update && si->shallow_ref[cmd->index] &&
 		    update_shallow_ref(cmd, si))
-- 
2.4.2