#include "pkt-line.h"
#include "commit.h"
#include "tag.h"
+#include "exec_cmd.h"
+#include "sideband.h"
+#include <sys/wait.h>
static int keep_pack;
static int quiet;
#define SEEN (1U << 3)
#define POPPED (1U << 4)
-static struct commit_list *rev_list = NULL;
-static int non_common_revs = 0, multi_ack = 0, use_thin_pack = 0;
+/*
+ * After sending this many "have"s if we do not get any new ACK , we
+ * give up traversing our history.
+ */
+#define MAX_IN_VAIN 256
+
+static struct commit_list *rev_list;
+static int non_common_revs, multi_ack, use_thin_pack, use_sideband;
static void rev_list_push(struct commit *commit, int mark)
{
}
}
-static int rev_list_insert_ref(const char *path, const unsigned char *sha1)
+static int rev_list_insert_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
{
struct object *o = deref_tag(parse_object(sha1), path, 0);
- if (o && o->type == commit_type)
+ if (o && o->type == OBJ_COMMIT)
rev_list_push((struct commit *)o, SEEN);
return 0;
int fetching;
int count = 0, flushes = 0, retval;
const unsigned char *sha1;
+ unsigned in_vain = 0;
+ int got_continue = 0;
- for_each_ref(rev_list_insert_ref);
+ for_each_ref(rev_list_insert_ref, NULL);
fetching = 0;
for ( ; refs ; refs = refs->next) {
continue;
}
- packet_write(fd[1], "want %s%s%s\n", sha1_to_hex(remote),
- (multi_ack ? " multi_ack" : ""),
- (use_thin_pack ? " thin-pack" : ""));
+ if (!fetching)
+ packet_write(fd[1], "want %s%s%s%s%s%s\n",
+ sha1_to_hex(remote),
+ (multi_ack ? " multi_ack" : ""),
+ (use_sideband == 2 ? " side-band-64k" : ""),
+ (use_sideband == 1 ? " side-band" : ""),
+ (use_thin_pack ? " thin-pack" : ""),
+ " ofs-delta");
+ else
+ packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
fetching++;
}
packet_flush(fd[1]);
packet_write(fd[1], "have %s\n", sha1_to_hex(sha1));
if (verbose)
fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
+ in_vain++;
if (!(31 & ++count)) {
int ack;
lookup_commit(result_sha1);
mark_common(commit, 0, 1);
retval = 0;
+ in_vain = 0;
+ got_continue = 1;
}
} while (ack);
flushes--;
+ if (got_continue && MAX_IN_VAIN < in_vain) {
+ if (verbose)
+ fprintf(stderr, "giving up\n");
+ break; /* give up */
+ }
}
}
done:
return retval;
}
-static struct commit_list *complete = NULL;
+static struct commit_list *complete;
-static int mark_complete(const char *path, const unsigned char *sha1)
+static int mark_complete(const char *path, const unsigned char *sha1, int flag, void *cb_data)
{
struct object *o = parse_object(sha1);
- while (o && o->type == tag_type) {
+ while (o && o->type == OBJ_TAG) {
struct tag *t = (struct tag *) o;
if (!t->tagged)
break; /* broken repository */
o->flags |= COMPLETE;
o = parse_object(t->tagged->sha1);
}
- if (o && o->type == commit_type) {
+ if (o && o->type == OBJ_COMMIT) {
struct commit *commit = (struct commit *)o;
commit->object.flags |= COMPLETE;
insert_by_date(commit, &complete);
* in sync with the other side at some time after
* that (it is OK if we guess wrong here).
*/
- if (o->type == commit_type) {
+ if (o->type == OBJ_COMMIT) {
struct commit *commit = (struct commit *)o;
if (!cutoff || cutoff < commit->date)
cutoff = commit->date;
}
}
- for_each_ref(mark_complete);
+ for_each_ref(mark_complete, NULL);
if (cutoff)
mark_recent_complete_commits(cutoff);
struct object *o = deref_tag(lookup_object(ref->old_sha1),
NULL, 0);
- if (!o || o->type != commit_type || !(o->flags & COMPLETE))
+ if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
continue;
if (!(o->flags & SEEN)) {
continue;
}
- memcpy(ref->new_sha1, local, 20);
+ hashcpy(ref->new_sha1, local);
if (!verbose)
continue;
fprintf(stderr,
return retval;
}
+static pid_t setup_sideband(int fd[2], int xd[2])
+{
+ pid_t side_pid;
+
+ if (!use_sideband) {
+ fd[0] = xd[0];
+ fd[1] = xd[1];
+ return 0;
+ }
+ /* xd[] is talking with upload-pack; subprocess reads from
+ * xd[0], spits out band#2 to stderr, and feeds us band#1
+ * through our fd[0].
+ */
+ if (pipe(fd) < 0)
+ die("fetch-pack: unable to set up pipe");
+ side_pid = fork();
+ if (side_pid < 0)
+ die("fetch-pack: unable to fork off sideband demultiplexer");
+ if (!side_pid) {
+ /* subprocess */
+ close(fd[0]);
+ if (xd[0] != xd[1])
+ close(xd[1]);
+ if (recv_sideband("fetch-pack", xd[0], fd[1], 2))
+ exit(1);
+ exit(0);
+ }
+ close(xd[0]);
+ close(fd[1]);
+ fd[1] = xd[1];
+ return side_pid;
+}
+
+static int get_pack(int xd[2], const char **argv)
+{
+ int status;
+ pid_t pid, side_pid;
+ int fd[2];
+
+ side_pid = setup_sideband(fd, xd);
+ pid = fork();
+ if (pid < 0)
+ die("fetch-pack: unable to fork off %s", argv[0]);
+ if (!pid) {
+ dup2(fd[0], 0);
+ close(fd[0]);
+ close(fd[1]);
+ execv_git_cmd(argv);
+ die("%s exec failed", argv[0]);
+ }
+ close(fd[0]);
+ close(fd[1]);
+ while (waitpid(pid, &status, 0) < 0) {
+ if (errno != EINTR)
+ die("waiting for %s: %s", argv[0], strerror(errno));
+ }
+ if (WIFEXITED(status)) {
+ int code = WEXITSTATUS(status);
+ if (code)
+ die("%s died with error code %d", argv[0], code);
+ return 0;
+ }
+ if (WIFSIGNALED(status)) {
+ int sig = WTERMSIG(status);
+ die("%s died of signal %d", argv[0], sig);
+ }
+ die("%s died of unnatural causes %d", argv[0], status);
+}
+
+static int explode_rx_pack(int xd[2])
+{
+ const char *argv[3] = { "unpack-objects", quiet ? "-q" : NULL, NULL };
+ return get_pack(xd, argv);
+}
+
+static int keep_rx_pack(int xd[2])
+{
+ const char *argv[6];
+ char keep_arg[256];
+ int n = 0;
+
+ argv[n++] = "index-pack";
+ argv[n++] = "--stdin";
+ if (!quiet)
+ argv[n++] = "-v";
+ if (use_thin_pack)
+ argv[n++] = "--fix-thin";
+ if (keep_pack > 1) {
+ int s = sprintf(keep_arg, "--keep=fetch-pack %i on ", getpid());
+ if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
+ strcpy(keep_arg + s, "localhost");
+ argv[n++] = keep_arg;
+ }
+ argv[n] = NULL;
+ return get_pack(xd, argv);
+}
+
static int fetch_pack(int fd[2], int nr_match, char **match)
{
struct ref *ref;
fprintf(stderr, "Server supports multi_ack\n");
multi_ack = 1;
}
+ if (server_supports("side-band-64k")) {
+ if (verbose)
+ fprintf(stderr, "Server supports side-band-64k\n");
+ use_sideband = 2;
+ }
+ else if (server_supports("side-band")) {
+ if (verbose)
+ fprintf(stderr, "Server supports side-band\n");
+ use_sideband = 1;
+ }
if (!ref) {
packet_flush(fd[1]);
die("no matching remote head");
goto all_done;
}
if (find_common(fd, sha1, ref) < 0)
- if (!keep_pack)
+ if (keep_pack != 1)
/* When cloning, it is not unusual to have
* no common commit.
*/
fprintf(stderr, "warning: no common commits\n");
- if (keep_pack)
- status = receive_keep_pack(fd, "git-fetch-pack", quiet);
- else
- status = receive_unpack_pack(fd, "git-fetch-pack", quiet);
-
+ status = (keep_pack) ? keep_rx_pack(fd) : explode_rx_pack(fd);
if (status)
die("git-fetch-pack: fetch failed.");
continue;
}
if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
- keep_pack = 1;
+ keep_pack++;
continue;
}
if (!strcmp("--thin", arg)) {
}
if (!dest)
usage(fetch_pack_usage);
- if (keep_pack)
- use_thin_pack = 0;
pid = git_connect(fd, dest, exec);
if (pid < 0)
return 1;
ret = fetch_pack(fd, nr_heads, heads);
close(fd[0]);
close(fd[1]);
- finish_connect(pid);
+ ret |= finish_connect(pid);
if (!ret && nr_heads) {
/* If the heads to pull were given, we should have
}
}
- return ret;
+ return !!ret;
}