8 static const char fetch_pack_usage[] =
9 "git-fetch-pack [-q] [-v] [--exec=upload-pack] [host:]directory <refs>...";
10 static const char *exec = "git-upload-pack";
12 static int find_common(int fd[2], unsigned char *result_sha1,
15 static char line[1000];
16 int count = 0, flushes = 0, retval;
19 revs = popen("git-rev-list $(git-rev-parse --all)", "r");
21 die("unable to run 'git-rev-list'");
24 unsigned char *remote = refs->old_sha1;
27 "want %s (%s)\n", sha1_to_hex(remote),
29 packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
35 while (fgets(line, sizeof(line), revs) != NULL) {
36 unsigned char sha1[20];
37 if (get_sha1_hex(line, sha1))
38 die("git-fetch-pack: expected object name, got crud");
39 packet_write(fd[1], "have %s\n", sha1_to_hex(sha1));
41 fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
42 if (!(31 & ++count)) {
47 * We keep one window "ahead" of the other side, and
48 * will wait for an ACK only on the next one
52 if (get_ack(fd[0], result_sha1)) {
56 fprintf(stderr, "got ack\n");
63 packet_write(fd[1], "done\n");
65 fprintf(stderr, "done\n");
68 if (get_ack(fd[0], result_sha1)) {
70 fprintf(stderr, "got ack\n");
77 static int fetch_pack(int fd[2], int nr_match, char **match)
80 unsigned char sha1[20];
84 get_remote_heads(fd[0], &ref, nr_match, match);
87 die("no matching remote head");
89 if (find_common(fd, sha1, ref) < 0)
90 fprintf(stderr, "warning: no common commits\n");
93 die("git-fetch-pack: unable to fork off git-unpack-objects");
98 execlp("git-unpack-objects", "git-unpack-objects",
99 quiet ? "-q" : NULL, NULL);
100 die("git-unpack-objects exec failed");
104 while (waitpid(pid, &status, 0) < 0) {
106 die("waiting for git-unpack-objects: %s", strerror(errno));
108 if (WIFEXITED(status)) {
109 int code = WEXITSTATUS(status);
111 die("git-unpack-objects died with error code %d", code);
114 sha1_to_hex(ref->old_sha1), ref->name);
119 if (WIFSIGNALED(status)) {
120 int sig = WTERMSIG(status);
121 die("git-unpack-objects died of signal %d", sig);
123 die("Sherlock Holmes! git-unpack-objects died of unnatural causes %d!", status);
126 int main(int argc, char **argv)
128 int i, ret, nr_heads;
129 char *dest = NULL, **heads;
135 for (i = 1; i < argc; i++) {
139 if (!strncmp("--exec=", arg, 7)) {
143 if (!strcmp("-q", arg)) {
147 if (!strcmp("-v", arg)) {
151 usage(fetch_pack_usage);
154 heads = argv + i + 1;
155 nr_heads = argc - i - 1;
159 usage(fetch_pack_usage);
160 pid = git_connect(fd, dest, exec);
163 ret = fetch_pack(fd, nr_heads, heads);