8 static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] <dir>";
10 #define THEY_HAVE (1U << 0)
11 #define OUR_REF (1U << 1)
12 #define WANTED (1U << 2)
15 static int nr_has = 0, nr_needs = 0, multi_ack = 0, nr_our_refs = 0;
16 static unsigned char has_sha1[MAX_HAS][20];
17 static unsigned char needs_sha1[MAX_NEEDS][20];
18 static unsigned int timeout = 0;
20 static void reset_timeout(void)
25 static int strip(char *line, int len)
27 if (len && line[len-1] == '\n')
32 static void create_pack_file(void)
36 int create_full_pack = (nr_our_refs == nr_needs && !nr_has);
39 die("git-upload-pack: unable to create pipe");
42 die("git-upload-pack: unable to fork git-rev-list");
54 args = nr_has + nr_needs + 5;
55 argv = xmalloc(args * sizeof(char *));
56 buf = xmalloc(args * 45);
63 *p++ = "git-rev-list";
65 if (create_full_pack || MAX_NEEDS <= nr_needs)
68 for (i = 0; i < nr_needs; i++) {
70 memcpy(buf, sha1_to_hex(needs_sha1[i]), 41);
74 if (!create_full_pack)
75 for (i = 0; i < nr_has; i++) {
78 memcpy(buf, sha1_to_hex(has_sha1[i]), 41);
82 execvp("git-rev-list", argv);
83 die("git-upload-pack: unable to exec git-rev-list");
88 execlp("git-pack-objects", "git-pack-objects", "--stdout", NULL);
89 die("git-upload-pack: unable to exec git-pack-objects");
92 static int got_sha1(char *hex, unsigned char *sha1)
94 if (get_sha1_hex(hex, sha1))
95 die("git-upload-pack: expected SHA1 object, got '%s'", hex);
96 if (!has_sha1_file(sha1))
98 if (nr_has < MAX_HAS) {
99 struct object *o = lookup_object(sha1);
100 if (!(o && o->parsed))
101 o = parse_object(sha1);
103 die("oops (%s)", sha1_to_hex(sha1));
104 if (o->type == commit_type) {
105 struct commit_list *parents;
106 if (o->flags & THEY_HAVE)
108 o->flags |= THEY_HAVE;
109 for (parents = ((struct commit*)o)->parents;
111 parents = parents->next)
112 parents->item->object.flags |= THEY_HAVE;
114 memcpy(has_sha1[nr_has++], sha1, 20);
119 static int get_common_commits(void)
121 static char line[1000];
122 unsigned char sha1[20], last_sha1[20];
125 track_object_refs = 0;
126 save_commit_buffer = 0;
129 len = packet_read_line(0, line, sizeof(line));
133 if (nr_has == 0 || multi_ack)
134 packet_write(1, "NAK\n");
137 len = strip(line, len);
138 if (!strncmp(line, "have ", 5)) {
139 if (got_sha1(line+5, sha1) &&
140 (multi_ack || nr_has == 1)) {
141 if (nr_has >= MAX_HAS)
143 packet_write(1, "ACK %s%s\n",
145 multi_ack ? " continue" : "");
147 memcpy(last_sha1, sha1, 20);
151 if (!strcmp(line, "done")) {
154 packet_write(1, "ACK %s\n",
155 sha1_to_hex(last_sha1));
158 packet_write(1, "NAK\n");
161 die("git-upload-pack: expected SHA1 list, got '%s'", line);
165 static int receive_needs(void)
167 static char line[1000];
173 unsigned char dummy[20], *sha1_buf;
174 len = packet_read_line(0, line, sizeof(line));
180 if (needs == MAX_NEEDS) {
182 "warning: supporting only a max of %d requests. "
183 "sending everything instead.\n",
186 else if (needs < MAX_NEEDS)
187 sha1_buf = needs_sha1[needs];
189 if (strncmp("want ", line, 5) || get_sha1_hex(line+5, sha1_buf))
190 die("git-upload-pack: protocol error, "
191 "expected to get sha, not '%s'", line);
192 if (strstr(line+45, "multi_ack"))
195 /* We have sent all our refs already, and the other end
196 * should have chosen out of them; otherwise they are
197 * asking for nonsense.
199 * Hmph. We may later want to allow "want" line that
200 * asks for something like "master~10" (symbolic)...
201 * would it make sense? I don't know.
203 o = lookup_object(sha1_buf);
204 if (!o || !(o->flags & OUR_REF))
205 die("git-upload-pack: not our ref %s", line+5);
206 if (!(o->flags & WANTED)) {
213 static int send_ref(const char *refname, const unsigned char *sha1)
215 static char *capabilities = "multi_ack";
216 struct object *o = parse_object(sha1);
219 packet_write(1, "%s %s%c%s\n", sha1_to_hex(sha1), refname,
222 packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
224 if (!(o->flags & OUR_REF)) {
228 if (o->type == tag_type) {
229 o = deref_tag(o, refname, 0);
230 packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname);
235 static int upload_pack(void)
239 for_each_ref(send_ref);
241 nr_needs = receive_needs();
244 get_common_commits();
249 int main(int argc, char **argv)
255 for (i = 1; i < argc; i++) {
260 if (!strcmp(arg, "--strict")) {
264 if (!strncmp(arg, "--timeout=", 10)) {
265 timeout = atoi(arg+10);
268 if (!strcmp(arg, "--")) {
275 usage(upload_pack_usage);
278 if (!enter_repo(dir, strict))
279 die("'%s': unable to chdir or not a git archive", dir);