#include "pkt-line.h"
#include "commit.h"
#include "tag.h"
+#include "exec_cmd.h"
+#include "sideband.h"
static int keep_pack;
static int quiet;
static int verbose;
static int fetch_all;
+static int depth;
static const char fetch_pack_usage[] =
-"git-fetch-pack [--all] [-q] [-v] [-k] [--thin] [--exec=upload-pack] [host:]directory <refs>...";
+"git-fetch-pack [--all] [-q] [-v] [-k] [--thin] [--exec=upload-pack] [--depth=<n>] [host:]directory <refs>...";
static const char *exec = "git-upload-pack";
#define COMPLETE (1U << 0)
}
if (!fetching)
- packet_write(fd[1], "want %s%s%s%s%s\n",
+ 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" : ""));
+ (use_thin_pack ? " thin-pack" : ""),
+ " 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 (!strncmp("shallow ", line, 8)) {
+ if (get_sha1_hex(line + 8, sha1))
+ die("invalid shallow line: %s", line);
+ register_shallow(sha1);
+ continue;
+ }
+ if (!strncmp("unshallow ", line, 10)) {
+ 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())) {
if (!memcmp(ref->name, "refs/", 5) &&
check_ref_format(ref->name + 5))
; /* trash */
- else if (fetch_all) {
+ else if (fetch_all &&
+ (!depth || strncmp(ref->name, "refs/tags/", 10) )) {
*newtail = ref;
ref->next = NULL;
newtail = &ref->next;
}
}
- for_each_ref(mark_complete, NULL);
- 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.
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;
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");
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, use_sideband);
- else
- status = receive_unpack_pack(fd, "git-fetch-pack", quiet, use_sideband);
-
+ status = (keep_pack) ? keep_rx_pack(fd) : explode_rx_pack(fd);
if (status)
die("git-fetch-pack: fetch failed.");
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;
+}
+
int main(int argc, char **argv)
{
int i, ret, nr_heads;
char *dest = NULL, **heads;
int fd[2];
pid_t pid;
+ struct stat st;
+ struct lock_file lock;
setup_git_directory();
continue;
}
if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
- keep_pack = 1;
+ keep_pack++;
continue;
}
if (!strcmp("--thin", arg)) {
verbose = 1;
continue;
}
+ if (!strncmp("--depth=", arg, 8)) {
+ depth = strtol(arg + 8, NULL, 0);
+ if (stat(git_path("shallow"), &st))
+ st.st_mtime = 0;
+ 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);
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]);
}
}
+ 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;
}