Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
Documentation/technical/protocol-capabilities.txt | 10 ++++++++++
upload-pack.c | 16 +++++++++++++---
2 files changed, 23 insertions(+), 3 deletions(-)
diff --git a/Documentation/technical/protocol-capabilities.txt b/Documentation/technical/protocol-capabilities.txt
index fd8ffa5..be09792 100644
--- a/Documentation/technical/protocol-capabilities.txt
+++ b/Documentation/technical/protocol-capabilities.txt
@@ -217,3 +217,13 @@ allow-tip-sha1-in-want
If the upload-pack server advertises this capability, fetch-pack may
send "want" lines with SHA-1s that exist at the server but are not
advertised by upload-pack.
+
+packv4
+------
+
+The upload-server can generate .pack version 4. If the client accepts
+this capability, the server may send a pack version 4. The server can
+choose to send pack version 2 even if the client accepts this
+capability.
+
+This capability does not include multi-base tree support.
diff --git a/upload-pack.c b/upload-pack.c
index ccf76d9..291d366 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -32,7 +32,7 @@ static unsigned long oldest_have;
static int multi_ack;
static int no_done;
-static int use_thin_pack, use_ofs_delta, use_include_tag;
+static int use_thin_pack, use_ofs_delta, use_include_tag, packv4_ok;
static int no_progress, daemon_mode;
static int allow_tip_sha1_in_want;
static int shallow_nr;
@@ -140,7 +140,7 @@ static void create_pack_file(void)
"corruption on the remote side.";
int buffered = -1;
ssize_t sz;
- const char *argv[10];
+ const char *argv[11];
int arg = 0;
argv[arg++] = "pack-objects";
@@ -157,6 +157,14 @@ static void create_pack_file(void)
argv[arg++] = "--delta-base-offset";
if (use_include_tag)
argv[arg++] = "--include-tag";
+ /*
+ * The client may have requested pack v4. But if this is a v2
+ * repo on a busy machine, we may want to send v2 and let the
+ * client do the v2->v4 conversion to reduce the cost on the
+ * server side.
+ */
+ if (packv4_ok)
+ argv[arg++] = "--version=4";
argv[arg++] = NULL;
memset(&pack_objects, 0, sizeof(pack_objects));
@@ -633,6 +641,8 @@ static void receive_needs(void)
no_progress = 1;
if (parse_feature_request(features, "include-tag"))
use_include_tag = 1;
+ if (parse_feature_request(features, "packv4"))
+ packv4_ok = 1;
o = parse_object(sha1_buf);
if (!o)
@@ -738,7 +748,7 @@ static int send_ref(const char *refname, const unsigned char *sha1, int flag, vo
{
static const char *capabilities = "multi_ack thin-pack side-band"
" side-band-64k ofs-delta shallow no-progress"
- " include-tag multi_ack_detailed";
+ " include-tag multi_ack_detailed packv4";
const char *refname_nons = strip_namespace(refname);
unsigned char peeled[20];
--
1.8.2.82.gc24b958
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