8 static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] <dir>";
10 #define THEY_HAVE (1U << 0)
13 static int nr_has = 0, nr_needs = 0, multi_ack = 0;
14 static unsigned char has_sha1[MAX_HAS][20];
15 static unsigned char needs_sha1[MAX_NEEDS][20];
16 static unsigned int timeout = 0;
18 static void reset_timeout(void)
23 static int strip(char *line, int len)
25 if (len && line[len-1] == '\n')
30 static void create_pack_file(void)
36 die("git-upload-pack: unable to create pipe");
39 die("git-upload-pack: unable to fork git-rev-list");
48 if (MAX_NEEDS <= nr_needs)
51 args = nr_has + nr_needs + 5;
52 argv = xmalloc(args * sizeof(char *));
53 buf = xmalloc(args * 45);
60 *p++ = "git-rev-list";
62 if (MAX_NEEDS <= nr_needs)
65 for (i = 0; i < nr_needs; i++) {
67 memcpy(buf, sha1_to_hex(needs_sha1[i]), 41);
71 for (i = 0; i < nr_has; i++) {
74 memcpy(buf, sha1_to_hex(has_sha1[i]), 41);
78 execvp("git-rev-list", argv);
79 die("git-upload-pack: unable to exec git-rev-list");
84 execlp("git-pack-objects", "git-pack-objects", "--stdout", NULL);
85 die("git-upload-pack: unable to exec git-pack-objects");
88 static int got_sha1(char *hex, unsigned char *sha1)
90 if (get_sha1_hex(hex, sha1))
91 die("git-upload-pack: expected SHA1 object, got '%s'", hex);
92 if (!has_sha1_file(sha1))
94 if (nr_has < MAX_HAS) {
95 struct object *o = lookup_object(sha1);
96 if (!o || (!o->parsed && !parse_object(sha1)))
97 die("oops (%s)", sha1_to_hex(sha1));
98 if (o->type == commit_type) {
99 struct commit_list *parents;
100 if (o->flags & THEY_HAVE)
102 o->flags |= THEY_HAVE;
103 for (parents = ((struct commit*)o)->parents;
105 parents = parents->next)
106 parents->item->object.flags |= THEY_HAVE;
108 memcpy(has_sha1[nr_has++], sha1, 20);
113 static int get_common_commits(void)
115 static char line[1000];
116 unsigned char sha1[20];
119 track_object_refs = 0;
120 save_commit_buffer = 0;
123 len = packet_read_line(0, line, sizeof(line));
127 if (multi_ack || nr_has == 0)
128 packet_write(1, "NAK\n");
131 len = strip(line, len);
132 if (!strncmp(line, "have ", 5)) {
133 if (got_sha1(line+5, sha1) &&
134 (multi_ack || nr_has == 1))
135 packet_write(1, "ACK %s%s\n",
137 multi_ack && nr_has < MAX_HAS ?
141 if (!strcmp(line, "done")) {
144 packet_write(1, "NAK\n");
147 die("git-upload-pack: expected SHA1 list, got '%s'", line);
151 static int receive_needs(void)
153 static char line[1000];
158 unsigned char dummy[20], *sha1_buf;
159 len = packet_read_line(0, line, sizeof(line));
165 if (needs == MAX_NEEDS) {
167 "warning: supporting only a max of %d requests. "
168 "sending everything instead.\n",
171 else if (needs < MAX_NEEDS)
172 sha1_buf = needs_sha1[needs];
174 if (strncmp("want ", line, 5) || get_sha1_hex(line+5, sha1_buf))
175 die("git-upload-pack: protocol error, "
176 "expected to get sha, not '%s'", line);
178 if (strstr(line+45, "multi_ack"))
185 static int send_ref(const char *refname, const unsigned char *sha1)
187 struct object *o = parse_object(sha1);
189 packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
190 if (o->type == tag_type) {
192 packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname);
197 static int upload_pack(void)
201 for_each_ref(send_ref);
203 nr_needs = receive_needs();
206 get_common_commits();
211 int main(int argc, char **argv)
217 for (i = 1; i < argc; i++) {
222 if (!strcmp(arg, "--strict")) {
226 if (!strncmp(arg, "--timeout=", 10)) {
227 timeout = atoi(arg+10);
230 if (!strcmp(arg, "--")) {
237 usage(upload_pack_usage);
240 /* chdir to the directory. If that fails, try appending ".git" */
241 if (chdir(dir) < 0) {
242 if (strict || chdir(mkpath("%s.git", dir)) < 0)
243 die("git-upload-pack unable to chdir to %s", dir);
248 if (access("objects", X_OK) || access("refs", X_OK))
249 die("git-upload-pack: %s doesn't seem to be a git archive", dir);