#include "cache.h"
#include "refs.h"
#include "pkt-line.h"
+#include "sideband.h"
#include "tag.h"
#include "object.h"
#include "commit.h"
static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] <dir>";
-#define THEY_HAVE (1U << 0)
-#define OUR_REF (1U << 1)
-#define WANTED (1U << 2)
-static int multi_ack = 0, nr_our_refs = 0;
-static int use_thin_pack = 0;
+/* bits #0..7 in revision.h, #8..10 in commit.c */
+#define THEY_HAVE (1u << 11)
+#define OUR_REF (1u << 12)
+#define WANTED (1u << 13)
+#define COMMON_KNOWN (1u << 14)
+#define REACHABLE (1u << 15)
+
+static unsigned long oldest_have;
+
+static int multi_ack, nr_our_refs;
+static int use_thin_pack, use_ofs_delta;
static struct object_array have_obj;
static struct object_array want_obj;
-static unsigned int timeout = 0;
-static int use_sideband = 0;
+static unsigned int timeout;
+/* 0 for no sideband,
+ * otherwise maximum packet size (up to 65520 bytes).
+ */
+static int use_sideband;
static void reset_timeout(void)
{
return len;
}
-#define PACKET_MAX 1000
static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
{
- ssize_t ssz;
- const char *p;
-
- if (!data) {
- if (!use_sideband)
- return 0;
- packet_flush(1);
+ if (use_sideband)
+ return send_sideband(1, fd, data, sz, use_sideband);
+ if (fd == 3)
+ /* emergency quit */
+ fd = 2;
+ if (fd == 2) {
+ xwrite(fd, data, sz);
+ return sz;
}
-
- if (!use_sideband) {
- if (fd == 3)
- /* emergency quit */
- fd = 2;
- if (fd == 2) {
- xwrite(fd, data, sz);
- return sz;
- }
- return safe_write(fd, data, sz);
- }
- p = data;
- ssz = sz;
- while (sz) {
- unsigned n;
- char hdr[5];
-
- n = sz;
- if (PACKET_MAX - 5 < n)
- n = PACKET_MAX - 5;
- sprintf(hdr, "%04x", n + 5);
- hdr[4] = fd;
- safe_write(1, hdr, 5);
- safe_write(1, p, n);
- p += n;
- sz -= n;
- }
- return ssz;
+ return safe_write(fd, data, sz);
}
static void create_pack_file(void)
close(pu_pipe[1]);
close(pe_pipe[0]);
close(pe_pipe[1]);
- execl_git_cmd("pack-objects", "--stdout", "--progress", NULL);
+ execl_git_cmd("pack-objects", "--stdout", "--progress",
+ use_ofs_delta ? "--delta-base-offset" : NULL,
+ NULL);
kill(pid_rev_list, SIGKILL);
die("git-upload-pack: unable to exec git-pack-objects");
}
goto fail;
fprintf(stderr, "flushed.\n");
}
- send_client_data(1, NULL, 0);
+ if (use_sideband)
+ packet_flush(1);
return;
}
fail:
static int got_sha1(char *hex, unsigned char *sha1)
{
struct object *o;
+ int we_knew_they_have = 0;
if (get_sha1_hex(hex, sha1))
die("git-upload-pack: expected SHA1 object, got '%s'", hex);
if (!has_sha1_file(sha1))
- return 0;
+ return -1;
o = lookup_object(sha1);
if (!(o && o->parsed))
die("oops (%s)", sha1_to_hex(sha1));
if (o->type == OBJ_COMMIT) {
struct commit_list *parents;
+ struct commit *commit = (struct commit *)o;
if (o->flags & THEY_HAVE)
- return 0;
- o->flags |= THEY_HAVE;
- for (parents = ((struct commit*)o)->parents;
+ we_knew_they_have = 1;
+ else
+ o->flags |= THEY_HAVE;
+ if (!oldest_have || (commit->date < oldest_have))
+ oldest_have = commit->date;
+ for (parents = commit->parents;
parents;
parents = parents->next)
parents->item->object.flags |= THEY_HAVE;
}
- add_object_array(o, NULL, &have_obj);
+ if (!we_knew_they_have) {
+ add_object_array(o, NULL, &have_obj);
+ return 1;
+ }
+ return 0;
+}
+
+static int reachable(struct commit *want)
+{
+ struct commit_list *work = NULL;
+
+ insert_by_date(want, &work);
+ while (work) {
+ struct commit_list *list = work->next;
+ struct commit *commit = work->item;
+ free(work);
+ work = list;
+
+ if (commit->object.flags & THEY_HAVE) {
+ want->object.flags |= COMMON_KNOWN;
+ break;
+ }
+ if (!commit->object.parsed)
+ parse_object(commit->object.sha1);
+ if (commit->object.flags & REACHABLE)
+ continue;
+ commit->object.flags |= REACHABLE;
+ if (commit->date < oldest_have)
+ continue;
+ for (list = commit->parents; list; list = list->next) {
+ struct commit *parent = list->item;
+ if (!(parent->object.flags & REACHABLE))
+ insert_by_date(parent, &work);
+ }
+ }
+ want->object.flags |= REACHABLE;
+ clear_commit_marks(want, REACHABLE);
+ free_commit_list(work);
+ return (want->object.flags & COMMON_KNOWN);
+}
+
+static int ok_to_give_up(void)
+{
+ int i;
+
+ if (!have_obj.nr)
+ return 0;
+
+ for (i = 0; i < want_obj.nr; i++) {
+ struct object *want = want_obj.objects[i].item;
+
+ if (want->flags & COMMON_KNOWN)
+ continue;
+ want = deref_tag(want, "a want line", 0);
+ if (!want || want->type != OBJ_COMMIT) {
+ /* no way to tell if this is reachable by
+ * looking at the ancestry chain alone, so
+ * leave a note to ourselves not to worry about
+ * this object anymore.
+ */
+ want_obj.objects[i].item->flags |= COMMON_KNOWN;
+ continue;
+ }
+ if (!reachable((struct commit *)want))
+ return 0;
+ }
return 1;
}
static int get_common_commits(void)
{
static char line[1000];
- unsigned char sha1[20], last_sha1[20];
+ unsigned char sha1[20];
+ char hex[41], last_hex[41];
int len;
track_object_refs = 0;
}
len = strip(line, len);
if (!strncmp(line, "have ", 5)) {
- if (got_sha1(line+5, sha1) &&
- (multi_ack || have_obj.nr == 1)) {
- packet_write(1, "ACK %s%s\n",
- sha1_to_hex(sha1),
- multi_ack ? " continue" : "");
- if (multi_ack)
- memcpy(last_sha1, sha1, 20);
+ switch (got_sha1(line+5, sha1)) {
+ case -1: /* they have what we do not */
+ if (multi_ack && ok_to_give_up())
+ packet_write(1, "ACK %s continue\n",
+ sha1_to_hex(sha1));
+ break;
+ default:
+ memcpy(hex, sha1_to_hex(sha1), 41);
+ if (multi_ack) {
+ const char *msg = "ACK %s continue\n";
+ packet_write(1, msg, hex);
+ memcpy(last_hex, hex, 41);
+ }
+ else if (have_obj.nr == 1)
+ packet_write(1, "ACK %s\n", hex);
+ break;
}
continue;
}
if (!strcmp(line, "done")) {
if (have_obj.nr > 0) {
if (multi_ack)
- packet_write(1, "ACK %s\n",
- sha1_to_hex(last_sha1));
+ packet_write(1, "ACK %s\n", last_hex);
return 0;
}
packet_write(1, "NAK\n");
multi_ack = 1;
if (strstr(line+45, "thin-pack"))
use_thin_pack = 1;
- if (strstr(line+45, "side-band"))
- use_sideband = 1;
+ if (strstr(line+45, "ofs-delta"))
+ use_ofs_delta = 1;
+ if (strstr(line+45, "side-band-64k"))
+ use_sideband = LARGE_PACKET_MAX;
+ else if (strstr(line+45, "side-band"))
+ use_sideband = DEFAULT_PACKET_MAX;
/* We have sent all our refs already, and the other end
* should have chosen out of them; otherwise they are
}
}
-static int send_ref(const char *refname, const unsigned char *sha1)
+static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
{
- static const char *capabilities = "multi_ack thin-pack side-band";
+ static const char *capabilities = "multi_ack thin-pack side-band side-band-64k ofs-delta";
struct object *o = parse_object(sha1);
if (!o)
return 0;
}
-static int upload_pack(void)
+static void upload_pack(void)
{
reset_timeout();
- head_ref(send_ref);
- for_each_ref(send_ref);
+ head_ref(send_ref, NULL);
+ for_each_ref(send_ref, NULL);
packet_flush(1);
receive_needs();
- if (!want_obj.nr)
- return 0;
- get_common_commits();
- create_pack_file();
- return 0;
+ if (want_obj.nr) {
+ get_common_commits();
+ create_pack_file();
+ }
}
int main(int argc, char **argv)