11 static const char fetch_pack_usage[] =
12 "git-fetch-pack [-q] [-v] [--exec=upload-pack] [host:]directory <refs>...";
13 static const char *exec = "git-upload-pack";
15 static int find_common(int fd[2], unsigned char *result_sha1,
19 static char line[1000];
20 int count = 0, flushes = 0, retval;
23 revs = popen("git-rev-list $(git-rev-parse --all)", "r");
25 die("unable to run 'git-rev-list'");
28 for ( ; refs ; refs = refs->next) {
29 unsigned char *remote = refs->old_sha1;
30 unsigned char *local = refs->new_sha1;
32 if (!memcmp(remote, local, 20))
34 packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
42 while (fgets(line, sizeof(line), revs) != NULL) {
43 unsigned char sha1[20];
44 if (get_sha1_hex(line, sha1))
45 die("git-fetch-pack: expected object name, got crud");
46 packet_write(fd[1], "have %s\n", sha1_to_hex(sha1));
48 fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
49 if (!(31 & ++count)) {
54 * We keep one window "ahead" of the other side, and
55 * will wait for an ACK only on the next one
59 if (get_ack(fd[0], result_sha1)) {
63 fprintf(stderr, "got ack\n");
70 packet_write(fd[1], "done\n");
72 fprintf(stderr, "done\n");
75 if (get_ack(fd[0], result_sha1)) {
77 fprintf(stderr, "got ack\n");
84 #define COMPLETE (1U << 0)
85 static struct commit_list *complete = NULL;
87 static int mark_complete(const char *path, const unsigned char *sha1)
89 struct object *o = parse_object(sha1);
91 while (o && o->type == tag_type) {
93 o = parse_object(((struct tag *)o)->tagged->sha1);
95 if (o->type == commit_type) {
96 struct commit *commit = (struct commit *)o;
97 commit->object.flags |= COMPLETE;
98 insert_by_date(commit, &complete);
103 static void mark_recent_complete_commits(unsigned long cutoff)
105 while (complete && cutoff <= complete->item->date) {
107 fprintf(stderr, "Marking %s as complete\n",
108 sha1_to_hex(complete->item->object.sha1));
109 pop_most_recent_commit(&complete, COMPLETE);
113 static int everything_local(struct ref *refs)
117 unsigned long cutoff = 0;
119 track_object_refs = 0;
120 save_commit_buffer = 0;
122 for (ref = refs; ref; ref = ref->next) {
125 o = parse_object(ref->old_sha1);
129 /* We already have it -- which may mean that we were
130 * in sync with the other side at some time after
131 * that (it is OK if we guess wrong here).
133 if (o->type == commit_type) {
134 struct commit *commit = (struct commit *)o;
135 if (!cutoff || cutoff < commit->date)
136 cutoff = commit->date;
140 for_each_ref(mark_complete);
142 mark_recent_complete_commits(cutoff);
144 for (retval = 1; refs ; refs = refs->next) {
145 const unsigned char *remote = refs->old_sha1;
146 unsigned char local[20];
149 o = parse_object(remote);
150 if (!o || !(o->flags & COMPLETE)) {
155 "want %s (%s)\n", sha1_to_hex(remote),
160 memcpy(refs->new_sha1, local, 20);
164 "already have %s (%s)\n", sha1_to_hex(remote),
170 static int fetch_pack(int fd[2], int nr_match, char **match)
173 unsigned char sha1[20];
177 get_remote_heads(fd[0], &ref, nr_match, match, 1);
180 die("no matching remote head");
182 if (everything_local(ref)) {
186 if (find_common(fd, sha1, ref) < 0)
187 fprintf(stderr, "warning: no common commits\n");
190 die("git-fetch-pack: unable to fork off git-unpack-objects");
195 execlp("git-unpack-objects", "git-unpack-objects",
196 quiet ? "-q" : NULL, NULL);
197 die("git-unpack-objects exec failed");
201 while (waitpid(pid, &status, 0) < 0) {
203 die("waiting for git-unpack-objects: %s", strerror(errno));
205 if (WIFEXITED(status)) {
206 int code = WEXITSTATUS(status);
208 die("git-unpack-objects died with error code %d", code);
212 sha1_to_hex(ref->old_sha1), ref->name);
217 if (WIFSIGNALED(status)) {
218 int sig = WTERMSIG(status);
219 die("git-unpack-objects died of signal %d", sig);
221 die("Sherlock Holmes! git-unpack-objects died of unnatural causes %d!", status);
224 int main(int argc, char **argv)
226 int i, ret, nr_heads;
227 char *dest = NULL, **heads;
233 for (i = 1; i < argc; i++) {
237 if (!strncmp("--exec=", arg, 7)) {
241 if (!strcmp("-q", arg)) {
245 if (!strcmp("-v", arg)) {
249 usage(fetch_pack_usage);
252 heads = argv + i + 1;
253 nr_heads = argc - i - 1;
257 usage(fetch_pack_usage);
258 pid = git_connect(fd, dest, exec);
261 ret = fetch_pack(fd, nr_heads, heads);