6 static const char send_pack_usage[] =
7 "git-send-pack [--all] [--exec=git-receive-pack] <remote> [<head>...]\n"
8 " --all and explicit <head> specification are mutually exclusive.";
9 static const char *exec = "git-receive-pack";
10 static int send_all = 0;
11 static int force_update = 0;
13 static int is_zero_sha1(const unsigned char *sha1)
17 for (i = 0; i < 20; i++) {
24 static void exec_pack_objects(void)
26 static char *args[] = {
31 execvp("git-pack-objects", args);
32 die("git-pack-objects exec failed (%s)", strerror(errno));
35 static void exec_rev_list(struct ref *refs)
37 static char *args[1000];
40 args[i++] = "git-rev-list"; /* 0 */
41 args[i++] = "--objects"; /* 1 */
43 char *buf = malloc(100);
45 die("git-rev-list environment overflow");
46 if (!is_zero_sha1(refs->old_sha1) &&
47 has_sha1_file(refs->old_sha1)) {
49 snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
52 if (!is_zero_sha1(refs->new_sha1)) {
54 snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
59 execvp("git-rev-list", args);
60 die("git-rev-list exec failed (%s)", strerror(errno));
63 static void rev_list(int fd, struct ref *refs)
66 pid_t pack_objects_pid;
68 if (pipe(pipe_fd) < 0)
69 die("rev-list setup: pipe failed");
70 pack_objects_pid = fork();
71 if (!pack_objects_pid) {
78 die("pack-objects setup failed");
80 if (pack_objects_pid < 0)
81 die("pack-objects fork failed");
89 static int pack_objects(int fd, struct ref *refs)
93 rev_list_pid = fork();
96 die("rev-list setup failed");
99 die("rev-list fork failed");
101 * We don't wait for the rev-list pipeline in the parent:
102 * we end up waiting for the other end instead
107 static int read_ref(const char *ref, unsigned char *sha1)
112 fd = open(git_path("%s", ref), O_RDONLY);
116 if (read(fd, buffer, sizeof(buffer)) >= 40)
117 ret = get_sha1_hex(buffer, sha1);
122 static int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
124 struct commit *new, *old;
125 struct commit_list *list;
129 old = lookup_commit_reference(old_sha1);
132 new = lookup_commit_reference(new_sha1);
135 if (parse_commit(new) < 0)
138 commit_list_insert(new, &list);
140 new = pop_most_recent_commit(&list, 1);
147 static int local_ref_nr_match;
148 static char **local_ref_match;
149 static struct ref *local_ref_list;
150 static struct ref **local_last_ref;
152 static int try_to_match(const char *refname, const unsigned char *sha1)
157 if (!path_match(refname, local_ref_nr_match, local_ref_match)) {
161 /* If we have it listed already, skip it */
162 for (ref = local_ref_list ; ref ; ref = ref->next) {
163 if (!strcmp(ref->name, refname))
168 len = strlen(refname)+1;
169 ref = xmalloc(sizeof(*ref) + len);
170 memset(ref->old_sha1, 0, 20);
171 memcpy(ref->new_sha1, sha1, 20);
172 memcpy(ref->name, refname, len);
174 *local_last_ref = ref;
175 local_last_ref = &ref->next;
179 static int send_pack(int in, int out, int nr_match, char **match)
181 struct ref *ref_list, **last_ref;
185 /* First we get all heads, whether matching or not.. */
186 last_ref = get_remote_heads(in, &ref_list, 0, NULL);
189 * Go through the refs, see if we want to update
192 for (ref = ref_list; ref; ref = ref->next) {
193 unsigned char new_sha1[20];
194 char *name = ref->name;
196 if (nr_match && !path_match(name, nr_match, match))
199 if (read_ref(name, new_sha1) < 0)
202 if (!memcmp(ref->old_sha1, new_sha1, 20)) {
203 fprintf(stderr, "'%s' unchanged\n", name);
207 if (!has_sha1_file(ref->old_sha1)) {
208 error("remote '%s' object %s does not exist on local",
209 name, sha1_to_hex(ref->old_sha1));
213 if (!ref_newer(new_sha1, ref->old_sha1)) {
214 error("remote '%s' isn't a strict parent of local", name);
218 /* Ok, mark it for update */
219 memcpy(ref->new_sha1, new_sha1, 20);
223 * See if we have any refs that the other end didn't have
225 if (nr_match || send_all) {
226 local_ref_nr_match = nr_match;
227 local_ref_match = match;
228 local_ref_list = ref_list;
229 local_last_ref = last_ref;
230 for_each_ref(try_to_match);
234 * Finally, tell the other end!
237 for (ref = ref_list; ref; ref = ref->next) {
238 char old_hex[60], *new_hex;
239 if (is_zero_sha1(ref->new_sha1))
242 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
243 new_hex = sha1_to_hex(ref->new_sha1);
244 packet_write(out, "%s %s %s", old_hex, new_hex, ref->name);
245 fprintf(stderr, "'%s': updating from %s to %s\n", ref->name, old_hex, new_hex);
250 pack_objects(out, ref_list);
255 int main(int argc, char **argv)
264 for (i = 1; i < argc; i++, argv++) {
268 if (!strncmp(arg, "--exec=", 7)) {
272 if (!strcmp(arg, "--all")) {
276 if (!strcmp(arg, "--force")) {
280 usage(send_pack_usage);
291 usage(send_pack_usage);
292 if (heads && send_all)
293 usage(send_pack_usage);
294 pid = git_connect(fd, dest, exec);
297 ret = send_pack(fd[0], fd[1], nr_heads, heads);