6 static const char clone_pack_usage[] = "git-clone-pack [host:]directory [heads]*";
7 static const char *exec = "git-upload-pack";
11 unsigned char sha1[20];
15 struct ref *get_remote_refs(int fd, int nr_match, char **match)
17 struct ref *ref_list = NULL, **next_ref = &ref_list;
20 static char line[1000];
21 unsigned char sha1[20];
26 len = packet_read_line(fd, line, sizeof(line));
29 if (line[len-1] == '\n')
31 if (len < 42 || get_sha1_hex(line, sha1))
32 die("git-fetch-pack: protocol error - expected ref descriptor, got '%s¤'", line);
35 if (nr_match && !path_match(refname, nr_match, match))
37 ref = xmalloc(sizeof(struct ref) + len);
39 memcpy(ref->sha1, sha1, 20);
40 memcpy(ref->name, refname, len);
42 next_ref = &ref->next;
47 static void clone_handshake(int fd[2], struct ref *ref)
49 unsigned char sha1[20];
52 packet_write(fd[1], "want %s\n", sha1_to_hex(ref->sha1));
57 /* We don't have nuttin' */
58 packet_write(fd[1], "done\n");
59 if (get_ack(fd[0], sha1))
60 error("Huh! git-clone-pack got positive ack for %s", sha1_to_hex(sha1));
63 static int is_master(struct ref *ref)
65 return !strcmp(ref->name, "refs/heads/master");
68 static void write_one_ref(struct ref *ref)
70 char *path = git_path(ref->name);
71 int fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0666);
75 die("unable to create ref %s", ref->name);
76 hex = sha1_to_hex(ref->sha1);
78 if (write(fd, hex, 41) != 41)
79 die("unable to write ref %s", ref->name);
83 static void write_refs(struct ref *ref)
85 struct ref *head = NULL, *head_ptr, *master_ref;
88 if (!strcmp(ref->name, "HEAD")) {
97 if (head && !memcmp(ref->sha1, head->sha1, 20)) {
98 if (!head_ptr || ref == master_ref)
107 head_path = git_path("HEAD");
110 * If we had a master ref, and it wasn't HEAD, we need to undo the
111 * symlink, and write a standalone HEAD. Give a warning, because that's
112 * really really wrong.
115 error("HEAD doesn't point to any refs! Making standalone HEAD");
122 /* We reset to the master branch if it's available */
127 * Uhhuh. Other end didn't have master. We start HEAD off with
128 * the first branch with the same value.
131 if (symlink(head_ptr->name, head_path) < 0)
132 die("unable to link HEAD to %s", head_ptr->name);
135 static int clone_pack(int fd[2], int nr_match, char **match)
141 refs = get_remote_refs(fd[0], nr_match, match);
144 die("no matching remote head");
146 clone_handshake(fd, refs);
149 die("git-clone-pack: unable to fork off git-unpack-objects");
154 execlp("git-unpack-objects", "git-unpack-objects", NULL);
155 die("git-unpack-objects exec failed");
159 while (waitpid(pid, &status, 0) < 0) {
161 die("waiting for git-unpack-objects: %s", strerror(errno));
163 if (WIFEXITED(status)) {
164 int code = WEXITSTATUS(status);
166 die("git-unpack-objects died with error code %d", code);
170 if (WIFSIGNALED(status)) {
171 int sig = WTERMSIG(status);
172 die("git-unpack-objects died of signal %d", sig);
174 die("Sherlock Holmes! git-unpack-objects died of unnatural causes %d!", status);
177 int main(int argc, char **argv)
179 int i, ret, nr_heads;
180 char *dest = NULL, **heads;
186 for (i = 1; i < argc; i++) {
190 /* Arguments go here */
191 usage(clone_pack_usage);
194 heads = argv + i + 1;
195 nr_heads = argc - i - 1;
199 usage(clone_pack_usage);
200 pid = git_connect(fd, dest, exec);
203 ret = clone_pack(fd, nr_heads, heads);