[PATCH 08/16] fetch-pack: support --subtree

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

This options requires subtree-aware upload-pack. It simply pass the
subtree from command line (or from $GIT_DIR/config) to upload-pack.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 builtin/fetch-pack.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index dbd8b7b..7460ecc 100644
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -237,6 +237,8 @@ static int find_common(int fd[2], unsigned char *result_sha1,
 	for_each_ref(rev_list_insert_ref, NULL);
 
 	fetching = 0;
+	if (core_subtree)
+		packet_buf_write(&req_buf, "subtree %s\n", core_subtree);
 	for ( ; refs ; refs = refs->next) {
 		unsigned char *remote = refs->old_sha1;
 		const char *remote_hex;
@@ -692,6 +694,8 @@ static struct ref *do_fetch_pack(int fd[2],
 
 	if (is_repository_shallow() && !server_supports("shallow"))
 		die("Server does not support shallow clients");
+	if (core_subtree && !server_supports("subtree"))
+		die("Server does not support subtree");
 	if (server_supports("multi_ack_detailed")) {
 		if (args.verbose)
 			fprintf(stderr, "Server supports multi_ack_detailed\n");
@@ -860,6 +864,10 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 				pack_lockfile_ptr = &pack_lockfile;
 				continue;
 			}
+			if (!prefixcmp(arg, "--subtree=")) {
+				core_subtree = arg + 10;
+				continue;
+			}
 			usage(fetch_pack_usage);
 		}
 		dest = (char *)arg;
-- 
1.7.1.rc1.69.g24c2f7