5 static const char send_pack_usage
[] =
6 "git-send-pack [--exec=git-receive-pack] [host:]directory [heads]*";
7 static const char *exec
= "git-receive-pack";
8 static int send_all
= 0;
12 unsigned char old_sha1
[20];
13 unsigned char new_sha1
[20];
17 static int is_zero_sha1(const unsigned char *sha1
)
21 for (i
= 0; i
< 20; i
++) {
28 static void exec_pack_objects(void)
30 static char *args
[] = {
35 execvp("git-pack-objects", args
);
36 die("git-pack-objects exec failed (%s)", strerror(errno
));
39 static void exec_rev_list(struct ref
*refs
)
41 static char *args
[1000];
44 args
[i
++] = "git-rev-list"; /* 0 */
45 args
[i
++] = "--objects"; /* 1 */
47 char *buf
= malloc(100);
49 die("git-rev-list environment overflow");
50 if (!is_zero_sha1(refs
->old_sha1
)) {
52 snprintf(buf
, 50, "^%s", sha1_to_hex(refs
->old_sha1
));
55 if (!is_zero_sha1(refs
->new_sha1
)) {
57 snprintf(buf
, 50, "%s", sha1_to_hex(refs
->new_sha1
));
62 execvp("git-rev-list", args
);
63 die("git-rev-list exec failed (%s)", strerror(errno
));
66 static void rev_list(int fd
, struct ref
*refs
)
69 pid_t pack_objects_pid
;
71 if (pipe(pipe_fd
) < 0)
72 die("rev-list setup: pipe failed");
73 pack_objects_pid
= fork();
74 if (!pack_objects_pid
) {
81 die("pack-objects setup failed");
83 if (pack_objects_pid
< 0)
84 die("pack-objects fork failed");
92 static int pack_objects(int fd
, struct ref
*refs
)
96 rev_list_pid
= fork();
99 die("rev-list setup failed");
101 if (rev_list_pid
< 0)
102 die("rev-list fork failed");
104 * We don't wait for the rev-list pipeline in the parent:
105 * we end up waiting for the other end instead
110 static int read_ref(const char *ref
, unsigned char *sha1
)
115 fd
= open(git_path("%s", ref
), O_RDONLY
);
119 if (read(fd
, buffer
, sizeof(buffer
)) >= 40)
120 ret
= get_sha1_hex(buffer
, sha1
);
125 static int ref_newer(const unsigned char *new_sha1
, const unsigned char *old_sha1
)
127 if (!has_sha1_file(old_sha1
))
130 * FIXME! It is not correct to say that the new one is newer
131 * just because we don't have the old one!
133 * We should really see if we can reach the old_sha1 commit
134 * from the new_sha1 one.
139 static int local_ref_nr_match
;
140 static char **local_ref_match
;
141 static struct ref
*local_ref_list
;
142 static struct ref
**local_last_ref
;
144 static int try_to_match(const char *refname
, const unsigned char *sha1
)
149 if (!path_match(refname
, local_ref_nr_match
, local_ref_match
)) {
153 /* If we have it listed already, skip it */
154 for (ref
= local_ref_list
; ref
; ref
= ref
->next
) {
155 if (!strcmp(ref
->name
, refname
))
160 len
= strlen(refname
)+1;
161 ref
= xmalloc(sizeof(*ref
) + len
);
162 memset(ref
->old_sha1
, 0, 20);
163 memcpy(ref
->new_sha1
, sha1
, 20);
164 memcpy(ref
->name
, refname
, len
);
166 *local_last_ref
= ref
;
167 local_last_ref
= &ref
->next
;
171 static int send_pack(int in
, int out
, int nr_match
, char **match
)
173 struct ref
*ref_list
= NULL
, **last_ref
= &ref_list
;
178 * Read all the refs from the other end
181 unsigned char old_sha1
[20];
182 static char buffer
[1000];
186 len
= packet_read_line(in
, buffer
, sizeof(buffer
));
189 if (buffer
[len
-1] == '\n')
192 if (len
< 42 || get_sha1_hex(buffer
, old_sha1
) || buffer
[40] != ' ')
193 die("protocol error: expected sha/ref, got '%s'", buffer
);
195 ref
= xmalloc(sizeof(*ref
) + len
- 40);
196 memcpy(ref
->old_sha1
, old_sha1
, 20);
197 memset(ref
->new_sha1
, 0, 20);
198 memcpy(ref
->name
, buffer
+ 41, len
- 40);
201 last_ref
= &ref
->next
;
205 * Go through the refs, see if we want to update
208 for (ref
= ref_list
; ref
; ref
= ref
->next
) {
209 unsigned char new_sha1
[20];
210 char *name
= ref
->name
;
212 if (nr_match
&& !path_match(name
, nr_match
, match
))
215 if (read_ref(name
, new_sha1
) < 0)
218 if (!memcmp(ref
->old_sha1
, new_sha1
, 20)) {
219 fprintf(stderr
, "'%s' unchanged\n", name
);
223 if (!ref_newer(new_sha1
, ref
->old_sha1
)) {
224 error("remote '%s' points to object I don't have", name
);
228 /* Ok, mark it for update */
229 memcpy(ref
->new_sha1
, new_sha1
, 20);
233 * See if we have any refs that the other end didn't have
236 local_ref_nr_match
= nr_match
;
237 local_ref_match
= match
;
238 local_ref_list
= ref_list
;
239 local_last_ref
= last_ref
;
240 for_each_ref(try_to_match
);
244 * Finally, tell the other end!
247 for (ref
= ref_list
; ref
; ref
= ref
->next
) {
248 char old_hex
[60], *new_hex
;
249 if (is_zero_sha1(ref
->new_sha1
))
252 strcpy(old_hex
, sha1_to_hex(ref
->old_sha1
));
253 new_hex
= sha1_to_hex(ref
->new_sha1
);
254 packet_write(out
, "%s %s %s", old_hex
, new_hex
, ref
->name
);
255 fprintf(stderr
, "'%s': updating from %s to %s\n", ref
->name
, old_hex
, new_hex
);
260 pack_objects(out
, ref_list
);
265 int main(int argc
, char **argv
)
274 for (i
= 1; i
< argc
; i
++, argv
++) {
278 if (!strncmp(arg
, "--exec=", 7)) {
282 if (!strcmp(arg
, "--all")) {
286 usage(send_pack_usage
);
297 usage(send_pack_usage
);
298 pid
= git_connect(fd
, dest
, exec
);
301 ret
= send_pack(fd
[0], fd
[1], nr_heads
, heads
);