4 static const char send_pack_usage[] = "git-send-pack [--exec=other] destination [heads]*";
5 static const char *exec = "git-receive-pack";
9 unsigned char old_sha1[20];
10 unsigned char new_sha1[20];
14 static void exec_pack_objects(void)
16 static char *args[] = {
21 execvp("git-pack-objects", args);
22 die("git-pack-objects exec failed (%s)", strerror(errno));
25 static void exec_rev_list(struct ref *refs)
27 static char *args[1000];
30 args[i++] = "git-rev-list"; /* 0 */
31 args[i++] = "--objects"; /* 1 */
33 char *buf = malloc(100);
35 die("git-rev-list environment overflow");
37 snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
40 snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
44 execvp("git-rev-list", args);
45 die("git-rev-list exec failed (%s)", strerror(errno));
48 static void rev_list(int fd, struct ref *refs)
51 pid_t pack_objects_pid;
53 if (pipe(pipe_fd) < 0)
54 die("rev-list setup: pipe failed");
55 pack_objects_pid = fork();
56 if (!pack_objects_pid) {
63 die("pack-objects setup failed");
65 if (pack_objects_pid < 0)
66 die("pack-objects fork failed");
74 static int pack_objects(int fd, struct ref *refs)
78 rev_list_pid = fork();
81 die("rev-list setup failed");
84 die("rev-list fork failed");
86 * We don't wait for the rev-list pipeline in the parent:
87 * we end up waiting for the other end instead
92 static int read_ref(const char *ref, unsigned char *sha1)
95 static char pathname[PATH_MAX];
97 const char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
99 snprintf(pathname, sizeof(pathname), "%s/%s", git_dir, ref);
100 fd = open(pathname, O_RDONLY);
104 if (read(fd, buffer, sizeof(buffer)) >= 40)
105 ret = get_sha1_hex(buffer, sha1);
110 static int send_pack(int in, int out, int nr_match, char **match)
112 struct ref *ref_list = NULL, **last_ref = &ref_list;
116 unsigned char old_sha1[20];
117 unsigned char new_sha1[20];
118 static char buffer[1000];
122 len = packet_read_line(in, buffer, sizeof(buffer));
125 if (buffer[len-1] == '\n')
128 if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
129 die("protocol error: expected sha/ref, got '%s'", buffer);
131 if (nr_match && !path_match(name, nr_match, match))
133 if (read_ref(name, new_sha1) < 0)
134 return error("no such local reference '%s'", name);
135 if (!has_sha1_file(old_sha1))
136 return error("remote '%s' points to object I don't have", name);
137 if (!memcmp(old_sha1, new_sha1, 20)) {
138 fprintf(stderr, "'%s' unchanged\n", name);
141 ref = xmalloc(sizeof(*ref) + len - 40);
142 memcpy(ref->old_sha1, old_sha1, 20);
143 memcpy(ref->new_sha1, new_sha1, 20);
144 memcpy(ref->name, buffer + 41, len - 40);
147 last_ref = &ref->next;
150 for (ref = ref_list; ref; ref = ref->next) {
151 char old_hex[60], *new_hex;
152 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
153 new_hex = sha1_to_hex(ref->new_sha1);
154 packet_write(out, "%s %s %s", old_hex, new_hex, ref->name);
155 fprintf(stderr, "'%s': updating from %s to %s\n", ref->name, old_hex, new_hex);
160 pack_objects(out, ref_list);
165 int main(int argc, char **argv)
174 for (i = 1; i < argc; i++) {
178 if (!strncmp(arg, "--exec=", 7)) {
182 usage(send_pack_usage);
186 nr_heads = argc - i -1;
190 usage(send_pack_usage);
191 pid = git_connect(fd, dest, exec);
194 ret = send_pack(fd[0], fd[1], nr_heads, heads);