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Commit | Line | Data |
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61221472 | 1 | #include "cache.h" |
2a9c3fe8 | 2 | #include "commit.h" |
584c6cc9 | 3 | #include "refs.h" |
f3a3214e | 4 | #include "pkt-line.h" |
61221472 | 5 | |
2a245013 JH |
6 | static const char send_pack_usage[] = |
7 | "git-send-pack [--exec=git-receive-pack] [host:]directory [heads]*"; | |
61221472 | 8 | static const char *exec = "git-receive-pack"; |
d089391c | 9 | static int send_all = 0; |
2a9c3fe8 | 10 | static int force_update = 0; |
61221472 | 11 | |
584c6cc9 LT |
12 | static int is_zero_sha1(const unsigned char *sha1) |
13 | { | |
14 | int i; | |
15 | ||
16 | for (i = 0; i < 20; i++) { | |
17 | if (*sha1++) | |
18 | return 0; | |
19 | } | |
20 | return 1; | |
21 | } | |
22 | ||
94fdb7aa LT |
23 | static void exec_pack_objects(void) |
24 | { | |
25 | static char *args[] = { | |
26 | "git-pack-objects", | |
27 | "--stdout", | |
28 | NULL | |
29 | }; | |
30 | execvp("git-pack-objects", args); | |
31 | die("git-pack-objects exec failed (%s)", strerror(errno)); | |
32 | } | |
33 | ||
34 | static void exec_rev_list(struct ref *refs) | |
35 | { | |
36 | static char *args[1000]; | |
37 | int i = 0; | |
38 | ||
39 | args[i++] = "git-rev-list"; /* 0 */ | |
40 | args[i++] = "--objects"; /* 1 */ | |
41 | while (refs) { | |
42 | char *buf = malloc(100); | |
43 | if (i > 900) | |
44 | die("git-rev-list environment overflow"); | |
584c6cc9 LT |
45 | if (!is_zero_sha1(refs->old_sha1)) { |
46 | args[i++] = buf; | |
47 | snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1)); | |
48 | buf += 50; | |
49 | } | |
50 | if (!is_zero_sha1(refs->new_sha1)) { | |
51 | args[i++] = buf; | |
52 | snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1)); | |
53 | } | |
94fdb7aa LT |
54 | refs = refs->next; |
55 | } | |
56 | args[i] = NULL; | |
57 | execvp("git-rev-list", args); | |
58 | die("git-rev-list exec failed (%s)", strerror(errno)); | |
59 | } | |
60 | ||
61 | static void rev_list(int fd, struct ref *refs) | |
62 | { | |
63 | int pipe_fd[2]; | |
64 | pid_t pack_objects_pid; | |
65 | ||
66 | if (pipe(pipe_fd) < 0) | |
67 | die("rev-list setup: pipe failed"); | |
68 | pack_objects_pid = fork(); | |
69 | if (!pack_objects_pid) { | |
70 | dup2(pipe_fd[0], 0); | |
71 | dup2(fd, 1); | |
72 | close(pipe_fd[0]); | |
73 | close(pipe_fd[1]); | |
74 | close(fd); | |
75 | exec_pack_objects(); | |
76 | die("pack-objects setup failed"); | |
77 | } | |
78 | if (pack_objects_pid < 0) | |
79 | die("pack-objects fork failed"); | |
80 | dup2(pipe_fd[1], 1); | |
81 | close(pipe_fd[0]); | |
82 | close(pipe_fd[1]); | |
83 | close(fd); | |
84 | exec_rev_list(refs); | |
85 | } | |
86 | ||
87 | static int pack_objects(int fd, struct ref *refs) | |
88 | { | |
89 | pid_t rev_list_pid; | |
90 | ||
91 | rev_list_pid = fork(); | |
92 | if (!rev_list_pid) { | |
93 | rev_list(fd, refs); | |
94 | die("rev-list setup failed"); | |
95 | } | |
96 | if (rev_list_pid < 0) | |
97 | die("rev-list fork failed"); | |
98 | /* | |
99 | * We don't wait for the rev-list pipeline in the parent: | |
100 | * we end up waiting for the other end instead | |
101 | */ | |
7ec4e608 | 102 | return 0; |
94fdb7aa | 103 | } |
e4b5c7ff LT |
104 | |
105 | static int read_ref(const char *ref, unsigned char *sha1) | |
106 | { | |
107 | int fd, ret; | |
e4b5c7ff | 108 | char buffer[60]; |
e4b5c7ff | 109 | |
723c31fe | 110 | fd = open(git_path("%s", ref), O_RDONLY); |
e4b5c7ff LT |
111 | if (fd < 0) |
112 | return -1; | |
113 | ret = -1; | |
114 | if (read(fd, buffer, sizeof(buffer)) >= 40) | |
115 | ret = get_sha1_hex(buffer, sha1); | |
116 | close(fd); | |
117 | return ret; | |
118 | } | |
119 | ||
584c6cc9 LT |
120 | static int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1) |
121 | { | |
2a9c3fe8 LT |
122 | struct commit *new, *old; |
123 | struct commit_list *list; | |
124 | ||
125 | if (force_update) | |
126 | return 1; | |
127 | old = lookup_commit_reference(old_sha1); | |
128 | if (!old) | |
584c6cc9 | 129 | return 0; |
2a9c3fe8 LT |
130 | new = lookup_commit_reference(new_sha1); |
131 | if (!new) | |
132 | return 0; | |
133 | if (parse_commit(new) < 0) | |
134 | return 0; | |
135 | list = NULL; | |
136 | commit_list_insert(new, &list); | |
bdf25142 LT |
137 | while (list) { |
138 | new = pop_most_recent_commit(&list, 1); | |
2a9c3fe8 LT |
139 | if (new == old) |
140 | return 1; | |
141 | } | |
142 | return 0; | |
584c6cc9 LT |
143 | } |
144 | ||
145 | static int local_ref_nr_match; | |
146 | static char **local_ref_match; | |
d089391c LT |
147 | static struct ref *local_ref_list; |
148 | static struct ref **local_last_ref; | |
584c6cc9 LT |
149 | |
150 | static int try_to_match(const char *refname, const unsigned char *sha1) | |
151 | { | |
152 | struct ref *ref; | |
153 | int len; | |
154 | ||
d089391c LT |
155 | if (!path_match(refname, local_ref_nr_match, local_ref_match)) { |
156 | if (!send_all) | |
157 | return 0; | |
158 | ||
159 | /* If we have it listed already, skip it */ | |
160 | for (ref = local_ref_list ; ref ; ref = ref->next) { | |
161 | if (!strcmp(ref->name, refname)) | |
162 | return 0; | |
163 | } | |
164 | } | |
584c6cc9 LT |
165 | |
166 | len = strlen(refname)+1; | |
167 | ref = xmalloc(sizeof(*ref) + len); | |
168 | memset(ref->old_sha1, 0, 20); | |
169 | memcpy(ref->new_sha1, sha1, 20); | |
170 | memcpy(ref->name, refname, len); | |
171 | ref->next = NULL; | |
d089391c LT |
172 | *local_last_ref = ref; |
173 | local_last_ref = &ref->next; | |
584c6cc9 LT |
174 | return 0; |
175 | } | |
176 | ||
d0efc8a7 | 177 | static int send_pack(int in, int out, int nr_match, char **match) |
61221472 | 178 | { |
d1c133f5 | 179 | struct ref *ref_list, **last_ref; |
7f8e9828 | 180 | struct ref *ref; |
584c6cc9 | 181 | int new_refs; |
7f8e9828 | 182 | |
d1c133f5 LT |
183 | /* First we get all heads, whether matching or not.. */ |
184 | last_ref = get_remote_heads(in, &ref_list, 0, NULL); | |
584c6cc9 LT |
185 | |
186 | /* | |
187 | * Go through the refs, see if we want to update | |
188 | * any of them.. | |
189 | */ | |
190 | for (ref = ref_list; ref; ref = ref->next) { | |
191 | unsigned char new_sha1[20]; | |
192 | char *name = ref->name; | |
193 | ||
d0efc8a7 LT |
194 | if (nr_match && !path_match(name, nr_match, match)) |
195 | continue; | |
584c6cc9 | 196 | |
7f8e9828 | 197 | if (read_ref(name, new_sha1) < 0) |
584c6cc9 LT |
198 | continue; |
199 | ||
584c6cc9 | 200 | if (!memcmp(ref->old_sha1, new_sha1, 20)) { |
e4b5c7ff | 201 | fprintf(stderr, "'%s' unchanged\n", name); |
7f8e9828 | 202 | continue; |
e4b5c7ff | 203 | } |
584c6cc9 LT |
204 | |
205 | if (!ref_newer(new_sha1, ref->old_sha1)) { | |
2a9c3fe8 | 206 | error("remote '%s' isn't a strict parent of local", name); |
584c6cc9 LT |
207 | continue; |
208 | } | |
209 | ||
210 | /* Ok, mark it for update */ | |
7f8e9828 | 211 | memcpy(ref->new_sha1, new_sha1, 20); |
7f8e9828 LT |
212 | } |
213 | ||
584c6cc9 LT |
214 | /* |
215 | * See if we have any refs that the other end didn't have | |
216 | */ | |
217 | if (nr_match) { | |
218 | local_ref_nr_match = nr_match; | |
219 | local_ref_match = match; | |
d089391c LT |
220 | local_ref_list = ref_list; |
221 | local_last_ref = last_ref; | |
584c6cc9 LT |
222 | for_each_ref(try_to_match); |
223 | } | |
224 | ||
225 | /* | |
226 | * Finally, tell the other end! | |
227 | */ | |
228 | new_refs = 0; | |
7f8e9828 LT |
229 | for (ref = ref_list; ref; ref = ref->next) { |
230 | char old_hex[60], *new_hex; | |
584c6cc9 LT |
231 | if (is_zero_sha1(ref->new_sha1)) |
232 | continue; | |
233 | new_refs++; | |
7f8e9828 LT |
234 | strcpy(old_hex, sha1_to_hex(ref->old_sha1)); |
235 | new_hex = sha1_to_hex(ref->new_sha1); | |
236 | packet_write(out, "%s %s %s", old_hex, new_hex, ref->name); | |
237 | fprintf(stderr, "'%s': updating from %s to %s\n", ref->name, old_hex, new_hex); | |
61221472 | 238 | } |
7f8e9828 | 239 | |
f3a3214e | 240 | packet_flush(out); |
584c6cc9 | 241 | if (new_refs) |
94fdb7aa | 242 | pack_objects(out, ref_list); |
61221472 LT |
243 | close(out); |
244 | return 0; | |
245 | } | |
246 | ||
61221472 LT |
247 | int main(int argc, char **argv) |
248 | { | |
249 | int i, nr_heads = 0; | |
250 | char *dest = NULL; | |
251 | char **heads = NULL; | |
7f8e9828 LT |
252 | int fd[2], ret; |
253 | pid_t pid; | |
61221472 LT |
254 | |
255 | argv++; | |
d089391c LT |
256 | for (i = 1; i < argc; i++, argv++) { |
257 | char *arg = *argv; | |
61221472 LT |
258 | |
259 | if (*arg == '-') { | |
260 | if (!strncmp(arg, "--exec=", 7)) { | |
261 | exec = arg + 7; | |
262 | continue; | |
263 | } | |
d089391c LT |
264 | if (!strcmp(arg, "--all")) { |
265 | send_all = 1; | |
266 | continue; | |
267 | } | |
2a9c3fe8 LT |
268 | if (!strcmp(arg, "--force")) { |
269 | force_update = 1; | |
270 | continue; | |
271 | } | |
61221472 LT |
272 | usage(send_pack_usage); |
273 | } | |
d089391c LT |
274 | if (!dest) { |
275 | dest = arg; | |
276 | continue; | |
277 | } | |
61221472 | 278 | heads = argv; |
d089391c | 279 | nr_heads = argc - i; |
61221472 LT |
280 | break; |
281 | } | |
282 | if (!dest) | |
283 | usage(send_pack_usage); | |
f7192598 | 284 | pid = git_connect(fd, dest, exec); |
7f8e9828 | 285 | if (pid < 0) |
61221472 | 286 | return 1; |
d0efc8a7 | 287 | ret = send_pack(fd[0], fd[1], nr_heads, heads); |
7f8e9828 LT |
288 | close(fd[0]); |
289 | close(fd[1]); | |
f7192598 | 290 | finish_connect(pid); |
7f8e9828 | 291 | return ret; |
61221472 | 292 | } |