Re: [PATCH] clone: fix refspec on "--single-branch" option

[Junio C Hamano <gitster@pobox.com>]

Junio C Hamano <gitster@pobox.com> writes:

> Alternatively, if you can move the logic to set up this
> configuration further down so that it happens after we talked to the
> other side and figured out remote_head_points_at, you could instead
> set it up to keep a single remote tracking branch.
>
> Even if you did so, guess_remote_head() may not find any branch when
> the other repository's HEAD is detached, so you would need to decide
> what to do in such a case, and "fetch and integrate their HEAD
> without using any remote tracking branch" may be a reasonable thing
> to do in such a case.

Along the lines of this, perhaps.

 builtin/clone.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git i/builtin/clone.c w/builtin/clone.c
index 5e8f3ba..c9e099d 100644
--- i/builtin/clone.c
+++ w/builtin/clone.c
@@ -853,6 +853,22 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 					      "refs/heads/master");
 	}
 
+	if (option_single_branch) {
+		/* Fix up the refspec for fetch */
+		strbuf_reset(&value);
+		if (!remote_head_points_at)
+			strbuf_addf(&value, "HEAD");
+		else
+			strbuf_addf(&value, "%s:%s%s",
+				    remote_head_points_at->name,
+				    branch_top.buf,
+				    skip_prefix(remote_head_points_at->name, "refs/heads/"));
+
+		strbuf_reset(&key);
+		strbuf_addf(&key, "remote.%s.fetch", option_origin);
+		git_config_set_multivar(key.buf, value.buf, NULL, 1);
+	}
+
 	if (is_local)
 		clone_local(path, git_dir);
 	else if (refs && complete_refs_before_fetch)