#include "pkt-line.h"
#include "commit.h"
#include "tag.h"
+#include "exec_cmd.h"
+#include "pack.h"
+#include "sideband.h"
static int keep_pack;
+static int transfer_unpack_limit = -1;
+static int fetch_unpack_limit = -1;
+static int unpack_limit = 100;
static int quiet;
static int verbose;
static int fetch_all;
+static int depth;
+static int no_progress;
static const char fetch_pack_usage[] =
-"git-fetch-pack [--all] [-q] [-v] [-k] [--thin] [--exec=upload-pack] [host:]directory <refs>...";
-static const char *exec = "git-upload-pack";
+"git-fetch-pack [--all] [--quiet|-q] [--keep|-k] [--thin] [--upload-pack=<git-upload-pack>] [--depth=<n>] [--no-progress] [-v] [<host>:]<directory> [<refs>...]";
+static const char *uploadpack = "git-upload-pack";
#define COMPLETE (1U << 0)
#define COMMON (1U << 1)
#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%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" : ""),
+ (no_progress ? " no-progress" : ""),
+ " ofs-delta");
+ else
+ packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
fetching++;
}
+ if (is_repository_shallow())
+ write_shallow_commits(fd[1], 1);
+ if (depth > 0)
+ packet_write(fd[1], "deepen %d", depth);
packet_flush(fd[1]);
if (!fetching)
return 1;
+ if (depth > 0) {
+ char line[1024];
+ unsigned char sha1[20];
+ int len;
+
+ while ((len = packet_read_line(fd[0], line, sizeof(line)))) {
+ if (!prefixcmp(line, "shallow ")) {
+ if (get_sha1_hex(line + 8, sha1))
+ die("invalid shallow line: %s", line);
+ register_shallow(sha1);
+ continue;
+ }
+ if (!prefixcmp(line, "unshallow ")) {
+ if (get_sha1_hex(line + 10, sha1))
+ die("invalid unshallow line: %s", line);
+ if (!lookup_object(sha1))
+ die("object not found: %s", line);
+ /* make sure that it is parsed as shallow */
+ parse_object(sha1);
+ if (unregister_shallow(sha1))
+ die("no shallow found: %s", line);
+ continue;
+ }
+ die("expected shallow/unshallow, got %s", line);
+ }
+ }
+
flushes = 0;
retval = -1;
while ((sha1 = get_rev())) {
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);
static void filter_refs(struct ref **refs, int nr_match, char **match)
{
- struct ref *prev, *current, *next;
-
- for (prev = NULL, current = *refs; current; current = next) {
- next = current->next;
- if ((!memcmp(current->name, "refs/", 5) &&
- check_ref_format(current->name + 5)) ||
- (!fetch_all &&
- !path_match(current->name, nr_match, match))) {
- if (prev == NULL)
- *refs = next;
- else
- prev->next = next;
- free(current);
- } else
- prev = current;
+ struct ref **return_refs;
+ struct ref *newlist = NULL;
+ struct ref **newtail = &newlist;
+ struct ref *ref, *next;
+ struct ref *fastarray[32];
+
+ if (nr_match && !fetch_all) {
+ if (ARRAY_SIZE(fastarray) < nr_match)
+ return_refs = xcalloc(nr_match, sizeof(struct ref *));
+ else {
+ return_refs = fastarray;
+ memset(return_refs, 0, sizeof(struct ref *) * nr_match);
+ }
}
+ else
+ return_refs = NULL;
+
+ for (ref = *refs; ref; ref = next) {
+ next = ref->next;
+ if (!memcmp(ref->name, "refs/", 5) &&
+ check_ref_format(ref->name + 5))
+ ; /* trash */
+ else if (fetch_all &&
+ (!depth || prefixcmp(ref->name, "refs/tags/") )) {
+ *newtail = ref;
+ ref->next = NULL;
+ newtail = &ref->next;
+ continue;
+ }
+ else {
+ int order = path_match(ref->name, nr_match, match);
+ if (order) {
+ return_refs[order-1] = ref;
+ continue; /* we will link it later */
+ }
+ }
+ free(ref);
+ }
+
+ if (!fetch_all) {
+ int i;
+ for (i = 0; i < nr_match; i++) {
+ ref = return_refs[i];
+ if (ref) {
+ *newtail = ref;
+ ref->next = NULL;
+ newtail = &ref->next;
+ }
+ }
+ if (return_refs != fastarray)
+ free(return_refs);
+ }
+ *refs = newlist;
}
static int everything_local(struct ref **refs, int nr_match, char **match)
* 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);
- if (cutoff)
- mark_recent_complete_commits(cutoff);
+ if (!depth) {
+ for_each_ref(mark_complete, NULL);
+ if (cutoff)
+ mark_recent_complete_commits(cutoff);
+ }
/*
* Mark all complete remote refs as common refs.
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])
+{
+ int status;
+ pid_t pid, side_pid;
+ int fd[2];
+ const char *argv[20];
+ char keep_arg[256];
+ char hdr_arg[256];
+ const char **av;
+ int do_keep = keep_pack;
+
+ side_pid = setup_sideband(fd, xd);
+
+ av = argv;
+ *hdr_arg = 0;
+ if (unpack_limit) {
+ struct pack_header header;
+
+ if (read_pack_header(fd[0], &header))
+ die("protocol error: bad pack header");
+ snprintf(hdr_arg, sizeof(hdr_arg), "--pack_header=%u,%u",
+ ntohl(header.hdr_version), ntohl(header.hdr_entries));
+ if (ntohl(header.hdr_entries) < unpack_limit)
+ do_keep = 0;
+ else
+ do_keep = 1;
+ }
+
+ if (do_keep) {
+ *av++ = "index-pack";
+ *av++ = "--stdin";
+ if (!quiet && !no_progress)
+ *av++ = "-v";
+ if (use_thin_pack)
+ *av++ = "--fix-thin";
+ if (keep_pack > 1 || unpack_limit) {
+ int s = sprintf(keep_arg,
+ "--keep=fetch-pack %d on ", getpid());
+ if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
+ strcpy(keep_arg + s, "localhost");
+ *av++ = keep_arg;
+ }
+ }
+ else {
+ *av++ = "unpack-objects";
+ if (quiet)
+ *av++ = "-q";
+ }
+ if (*hdr_arg)
+ *av++ = hdr_arg;
+ *av++ = NULL;
+
+ 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 fetch_pack(int fd[2], int nr_match, char **match)
{
struct ref *ref;
unsigned char sha1[20];
- int status;
get_remote_heads(fd[0], &ref, 0, NULL, 0);
+ if (is_repository_shallow() && !server_supports("shallow"))
+ die("Server does not support shallow clients");
if (server_supports("multi_ack")) {
if (verbose)
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);
-
- if (status)
+ if (get_pack(fd))
die("git-fetch-pack: fetch failed.");
all_done:
return 0;
}
+static int remove_duplicates(int nr_heads, char **heads)
+{
+ int src, dst;
+
+ for (src = dst = 0; src < nr_heads; src++) {
+ /* If heads[src] is different from any of
+ * heads[0..dst], push it in.
+ */
+ int i;
+ for (i = 0; i < dst; i++) {
+ if (!strcmp(heads[i], heads[src]))
+ break;
+ }
+ if (i < dst)
+ continue;
+ if (src != dst)
+ heads[dst] = heads[src];
+ dst++;
+ }
+ heads[dst] = 0;
+ return dst;
+}
+
+static int fetch_pack_config(const char *var, const char *value)
+{
+ if (strcmp(var, "fetch.unpacklimit") == 0) {
+ fetch_unpack_limit = git_config_int(var, value);
+ return 0;
+ }
+
+ if (strcmp(var, "transfer.unpacklimit") == 0) {
+ transfer_unpack_limit = git_config_int(var, value);
+ return 0;
+ }
+
+ return git_default_config(var, value);
+}
+
+static struct lock_file lock;
+
int main(int argc, char **argv)
{
int i, ret, nr_heads;
char *dest = NULL, **heads;
int fd[2];
pid_t pid;
+ struct stat st;
setup_git_directory();
+ git_config(fetch_pack_config);
+
+ if (0 <= transfer_unpack_limit)
+ unpack_limit = transfer_unpack_limit;
+ else if (0 <= fetch_unpack_limit)
+ unpack_limit = fetch_unpack_limit;
nr_heads = 0;
heads = NULL;
char *arg = argv[i];
if (*arg == '-') {
- if (!strncmp("--exec=", arg, 7)) {
- exec = arg + 7;
+ if (!prefixcmp(arg, "--upload-pack=")) {
+ uploadpack = arg + 14;
+ continue;
+ }
+ if (!prefixcmp(arg, "--exec=")) {
+ uploadpack = arg + 7;
continue;
}
if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
continue;
}
if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
- keep_pack = 1;
+ keep_pack++;
+ unpack_limit = 0;
continue;
}
if (!strcmp("--thin", arg)) {
verbose = 1;
continue;
}
+ if (!prefixcmp(arg, "--depth=")) {
+ depth = strtol(arg + 8, NULL, 0);
+ if (stat(git_path("shallow"), &st))
+ st.st_mtime = 0;
+ continue;
+ }
+ if (!strcmp("--no-progress", arg)) {
+ no_progress = 1;
+ continue;
+ }
usage(fetch_pack_usage);
}
dest = arg;
}
if (!dest)
usage(fetch_pack_usage);
- if (keep_pack)
- use_thin_pack = 0;
- pid = git_connect(fd, dest, exec);
+ pid = git_connect(fd, dest, uploadpack);
if (pid < 0)
return 1;
+ if (heads && nr_heads)
+ nr_heads = remove_duplicates(nr_heads, heads);
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;
+ if (!ret && depth > 0) {
+ struct cache_time mtime;
+ char *shallow = git_path("shallow");
+ int fd;
+
+ mtime.sec = st.st_mtime;
+#ifdef USE_NSEC
+ mtime.usec = st.st_mtim.usec;
+#endif
+ if (stat(shallow, &st)) {
+ if (mtime.sec)
+ die("shallow file was removed during fetch");
+ } else if (st.st_mtime != mtime.sec
+#ifdef USE_NSEC
+ || st.st_mtim.usec != mtime.usec
+#endif
+ )
+ die("shallow file was changed during fetch");
+
+ fd = hold_lock_file_for_update(&lock, shallow, 1);
+ if (!write_shallow_commits(fd, 0)) {
+ unlink(shallow);
+ rollback_lock_file(&lock);
+ } else {
+ close(fd);
+ commit_lock_file(&lock);
+ }
+ }
+
+ return !!ret;
}