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,
16 static char line[1000];
17 int count = 0, flushes = 0, retval;
20 revs = popen("git-rev-list $(git-rev-parse --all)", "r");
22 die("unable to run 'git-rev-list'");
25 for ( ; refs ; refs = refs->next) {
26 unsigned char *remote = refs->old_sha1;
27 unsigned char *local = refs->new_sha1;
29 if (!memcmp(remote, local, 20))
31 packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
39 while (fgets(line, sizeof(line), revs) != NULL) {
40 unsigned char sha1[20];
41 if (get_sha1_hex(line, sha1))
42 die("git-fetch-pack: expected object name, got crud");
43 packet_write(fd[1], "have %s\n", sha1_to_hex(sha1));
45 fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
46 if (!(31 & ++count)) {
51 * We keep one window "ahead" of the other side, and
52 * will wait for an ACK only on the next one
56 if (get_ack(fd[0], result_sha1)) {
60 fprintf(stderr, "got ack\n");
67 packet_write(fd[1], "done\n");
69 fprintf(stderr, "done\n");
72 if (get_ack(fd[0], result_sha1)) {
74 fprintf(stderr, "got ack\n");
81 static int everything_local(struct ref *refs)
85 for (retval = 1; refs ; refs = refs->next) {
86 const unsigned char *remote = refs->old_sha1;
87 unsigned char local[20];
89 if (read_ref(git_path("%s", refs->name), local) < 0 ||
90 memcmp(remote, local, 20)) {
95 "want %s (%s)\n", sha1_to_hex(remote),
100 memcpy(refs->new_sha1, local, 20);
104 "already have %s (%s)\n", sha1_to_hex(remote),
110 static int fetch_pack(int fd[2], int nr_match, char **match)
113 unsigned char sha1[20];
117 get_remote_heads(fd[0], &ref, nr_match, match, 1);
120 die("no matching remote head");
122 if (everything_local(ref)) {
126 if (find_common(fd, sha1, ref) < 0)
127 fprintf(stderr, "warning: no common commits\n");
130 die("git-fetch-pack: unable to fork off git-unpack-objects");
135 execlp("git-unpack-objects", "git-unpack-objects",
136 quiet ? "-q" : NULL, NULL);
137 die("git-unpack-objects exec failed");
141 while (waitpid(pid, &status, 0) < 0) {
143 die("waiting for git-unpack-objects: %s", strerror(errno));
145 if (WIFEXITED(status)) {
146 int code = WEXITSTATUS(status);
148 die("git-unpack-objects died with error code %d", code);
152 sha1_to_hex(ref->old_sha1), ref->name);
157 if (WIFSIGNALED(status)) {
158 int sig = WTERMSIG(status);
159 die("git-unpack-objects died of signal %d", sig);
161 die("Sherlock Holmes! git-unpack-objects died of unnatural causes %d!", status);
164 int main(int argc, char **argv)
166 int i, ret, nr_heads;
167 char *dest = NULL, **heads;
173 for (i = 1; i < argc; i++) {
177 if (!strncmp("--exec=", arg, 7)) {
181 if (!strcmp("-q", arg)) {
185 if (!strcmp("-v", arg)) {
189 usage(fetch_pack_usage);
192 heads = argv + i + 1;
193 nr_heads = argc - i - 1;
197 usage(fetch_pack_usage);
198 pid = git_connect(fd, dest, exec);
201 ret = fetch_pack(fd, nr_heads, heads);