7 static const char fetch_pack_usage[] = "git-fetch-pack [-q] [--exec=upload-pack] [host:]directory [heads]* < mycommitlist";
8 static const char *exec = "git-upload-pack";
10 static int find_common(int fd[2], unsigned char *result_sha1, unsigned char *remote)
12 static char line[1000];
13 int count = 0, flushes = 0, retval;
16 revs = popen("git-rev-list $(git-rev-parse --all)", "r");
18 die("unable to run 'git-rev-list'");
19 packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
23 while (fgets(line, sizeof(line), revs) != NULL) {
24 unsigned char sha1[20];
25 if (get_sha1_hex(line, sha1))
26 die("git-fetch-pack: expected object name, got crud");
27 packet_write(fd[1], "have %s\n", sha1_to_hex(sha1));
28 if (!(31 & ++count)) {
33 * We keep one window "ahead" of the other side, and
34 * will wait for an ACK only on the next one
38 if (get_ack(fd[0], result_sha1)) {
47 packet_write(fd[1], "done\n");
50 if (get_ack(fd[0], result_sha1))
56 static int get_remote_heads(int fd, int nr_match, char **match, unsigned char *result)
61 static char line[1000];
62 unsigned char sha1[20];
66 len = packet_read_line(fd, line, sizeof(line));
69 if (line[len-1] == '\n')
71 if (len < 42 || get_sha1_hex(line, sha1))
72 die("git-fetch-pack: protocol error - expected ref descriptor, got '%s'", line);
74 if (nr_match && !path_match(refname, nr_match, match))
77 memcpy(result, sha1, 20);
82 static int fetch_pack(int fd[2], int nr_match, char **match)
84 unsigned char sha1[20], remote[20];
88 heads = get_remote_heads(fd[0], nr_match, match, remote);
91 die(heads ? "multiple remote heads" : "no matching remote head");
93 if (find_common(fd, sha1, remote) < 0)
94 die("git-fetch-pack: no common commits");
97 die("git-fetch-pack: unable to fork off git-unpack-objects");
102 execlp("git-unpack-objects", "git-unpack-objects",
103 quiet ? "-q" : NULL, NULL);
104 die("git-unpack-objects exec failed");
108 while (waitpid(pid, &status, 0) < 0) {
110 die("waiting for git-unpack-objects: %s", strerror(errno));
112 if (WIFEXITED(status)) {
113 int code = WEXITSTATUS(status);
115 die("git-unpack-objects died with error code %d", code);
116 puts(sha1_to_hex(remote));
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 usage(fetch_pack_usage);
146 heads = argv + i + 1;
147 nr_heads = argc - i - 1;
151 usage(fetch_pack_usage);
152 pid = git_connect(fd, dest, exec);
155 ret = fetch_pack(fd, nr_heads, heads);