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Commit | Line | Data |
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61221472 | 1 | #include "cache.h" |
584c6cc9 | 2 | #include "refs.h" |
f3a3214e | 3 | #include "pkt-line.h" |
61221472 | 4 | |
2a245013 JH |
5 | static const char send_pack_usage[] = |
6 | "git-send-pack [--exec=git-receive-pack] [host:]directory [heads]*"; | |
61221472 | 7 | static const char *exec = "git-receive-pack"; |
d089391c | 8 | static int send_all = 0; |
61221472 | 9 | |
584c6cc9 LT |
10 | static int is_zero_sha1(const unsigned char *sha1) |
11 | { | |
12 | int i; | |
13 | ||
14 | for (i = 0; i < 20; i++) { | |
15 | if (*sha1++) | |
16 | return 0; | |
17 | } | |
18 | return 1; | |
19 | } | |
20 | ||
94fdb7aa LT |
21 | static void exec_pack_objects(void) |
22 | { | |
23 | static char *args[] = { | |
24 | "git-pack-objects", | |
25 | "--stdout", | |
26 | NULL | |
27 | }; | |
28 | execvp("git-pack-objects", args); | |
29 | die("git-pack-objects exec failed (%s)", strerror(errno)); | |
30 | } | |
31 | ||
32 | static void exec_rev_list(struct ref *refs) | |
33 | { | |
34 | static char *args[1000]; | |
35 | int i = 0; | |
36 | ||
37 | args[i++] = "git-rev-list"; /* 0 */ | |
38 | args[i++] = "--objects"; /* 1 */ | |
39 | while (refs) { | |
40 | char *buf = malloc(100); | |
41 | if (i > 900) | |
42 | die("git-rev-list environment overflow"); | |
584c6cc9 LT |
43 | if (!is_zero_sha1(refs->old_sha1)) { |
44 | args[i++] = buf; | |
45 | snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1)); | |
46 | buf += 50; | |
47 | } | |
48 | if (!is_zero_sha1(refs->new_sha1)) { | |
49 | args[i++] = buf; | |
50 | snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1)); | |
51 | } | |
94fdb7aa LT |
52 | refs = refs->next; |
53 | } | |
54 | args[i] = NULL; | |
55 | execvp("git-rev-list", args); | |
56 | die("git-rev-list exec failed (%s)", strerror(errno)); | |
57 | } | |
58 | ||
59 | static void rev_list(int fd, struct ref *refs) | |
60 | { | |
61 | int pipe_fd[2]; | |
62 | pid_t pack_objects_pid; | |
63 | ||
64 | if (pipe(pipe_fd) < 0) | |
65 | die("rev-list setup: pipe failed"); | |
66 | pack_objects_pid = fork(); | |
67 | if (!pack_objects_pid) { | |
68 | dup2(pipe_fd[0], 0); | |
69 | dup2(fd, 1); | |
70 | close(pipe_fd[0]); | |
71 | close(pipe_fd[1]); | |
72 | close(fd); | |
73 | exec_pack_objects(); | |
74 | die("pack-objects setup failed"); | |
75 | } | |
76 | if (pack_objects_pid < 0) | |
77 | die("pack-objects fork failed"); | |
78 | dup2(pipe_fd[1], 1); | |
79 | close(pipe_fd[0]); | |
80 | close(pipe_fd[1]); | |
81 | close(fd); | |
82 | exec_rev_list(refs); | |
83 | } | |
84 | ||
85 | static int pack_objects(int fd, struct ref *refs) | |
86 | { | |
87 | pid_t rev_list_pid; | |
88 | ||
89 | rev_list_pid = fork(); | |
90 | if (!rev_list_pid) { | |
91 | rev_list(fd, refs); | |
92 | die("rev-list setup failed"); | |
93 | } | |
94 | if (rev_list_pid < 0) | |
95 | die("rev-list fork failed"); | |
96 | /* | |
97 | * We don't wait for the rev-list pipeline in the parent: | |
98 | * we end up waiting for the other end instead | |
99 | */ | |
7ec4e608 | 100 | return 0; |
94fdb7aa | 101 | } |
e4b5c7ff LT |
102 | |
103 | static int read_ref(const char *ref, unsigned char *sha1) | |
104 | { | |
105 | int fd, ret; | |
e4b5c7ff | 106 | char buffer[60]; |
e4b5c7ff | 107 | |
723c31fe | 108 | fd = open(git_path("%s", ref), O_RDONLY); |
e4b5c7ff LT |
109 | if (fd < 0) |
110 | return -1; | |
111 | ret = -1; | |
112 | if (read(fd, buffer, sizeof(buffer)) >= 40) | |
113 | ret = get_sha1_hex(buffer, sha1); | |
114 | close(fd); | |
115 | return ret; | |
116 | } | |
117 | ||
584c6cc9 LT |
118 | static int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1) |
119 | { | |
120 | if (!has_sha1_file(old_sha1)) | |
121 | return 0; | |
122 | /* | |
123 | * FIXME! It is not correct to say that the new one is newer | |
124 | * just because we don't have the old one! | |
125 | * | |
126 | * We should really see if we can reach the old_sha1 commit | |
127 | * from the new_sha1 one. | |
128 | */ | |
129 | return 1; | |
130 | } | |
131 | ||
132 | static int local_ref_nr_match; | |
133 | static char **local_ref_match; | |
d089391c LT |
134 | static struct ref *local_ref_list; |
135 | static struct ref **local_last_ref; | |
584c6cc9 LT |
136 | |
137 | static int try_to_match(const char *refname, const unsigned char *sha1) | |
138 | { | |
139 | struct ref *ref; | |
140 | int len; | |
141 | ||
d089391c LT |
142 | if (!path_match(refname, local_ref_nr_match, local_ref_match)) { |
143 | if (!send_all) | |
144 | return 0; | |
145 | ||
146 | /* If we have it listed already, skip it */ | |
147 | for (ref = local_ref_list ; ref ; ref = ref->next) { | |
148 | if (!strcmp(ref->name, refname)) | |
149 | return 0; | |
150 | } | |
151 | } | |
584c6cc9 LT |
152 | |
153 | len = strlen(refname)+1; | |
154 | ref = xmalloc(sizeof(*ref) + len); | |
155 | memset(ref->old_sha1, 0, 20); | |
156 | memcpy(ref->new_sha1, sha1, 20); | |
157 | memcpy(ref->name, refname, len); | |
158 | ref->next = NULL; | |
d089391c LT |
159 | *local_last_ref = ref; |
160 | local_last_ref = &ref->next; | |
584c6cc9 LT |
161 | return 0; |
162 | } | |
163 | ||
d0efc8a7 | 164 | static int send_pack(int in, int out, int nr_match, char **match) |
61221472 | 165 | { |
d1c133f5 | 166 | struct ref *ref_list, **last_ref; |
7f8e9828 | 167 | struct ref *ref; |
584c6cc9 | 168 | int new_refs; |
7f8e9828 | 169 | |
d1c133f5 LT |
170 | /* First we get all heads, whether matching or not.. */ |
171 | last_ref = get_remote_heads(in, &ref_list, 0, NULL); | |
584c6cc9 LT |
172 | |
173 | /* | |
174 | * Go through the refs, see if we want to update | |
175 | * any of them.. | |
176 | */ | |
177 | for (ref = ref_list; ref; ref = ref->next) { | |
178 | unsigned char new_sha1[20]; | |
179 | char *name = ref->name; | |
180 | ||
d0efc8a7 LT |
181 | if (nr_match && !path_match(name, nr_match, match)) |
182 | continue; | |
584c6cc9 | 183 | |
7f8e9828 | 184 | if (read_ref(name, new_sha1) < 0) |
584c6cc9 LT |
185 | continue; |
186 | ||
584c6cc9 | 187 | if (!memcmp(ref->old_sha1, new_sha1, 20)) { |
e4b5c7ff | 188 | fprintf(stderr, "'%s' unchanged\n", name); |
7f8e9828 | 189 | continue; |
e4b5c7ff | 190 | } |
584c6cc9 LT |
191 | |
192 | if (!ref_newer(new_sha1, ref->old_sha1)) { | |
193 | error("remote '%s' points to object I don't have", name); | |
194 | continue; | |
195 | } | |
196 | ||
197 | /* Ok, mark it for update */ | |
7f8e9828 | 198 | memcpy(ref->new_sha1, new_sha1, 20); |
7f8e9828 LT |
199 | } |
200 | ||
584c6cc9 LT |
201 | /* |
202 | * See if we have any refs that the other end didn't have | |
203 | */ | |
204 | if (nr_match) { | |
205 | local_ref_nr_match = nr_match; | |
206 | local_ref_match = match; | |
d089391c LT |
207 | local_ref_list = ref_list; |
208 | local_last_ref = last_ref; | |
584c6cc9 LT |
209 | for_each_ref(try_to_match); |
210 | } | |
211 | ||
212 | /* | |
213 | * Finally, tell the other end! | |
214 | */ | |
215 | new_refs = 0; | |
7f8e9828 LT |
216 | for (ref = ref_list; ref; ref = ref->next) { |
217 | char old_hex[60], *new_hex; | |
584c6cc9 LT |
218 | if (is_zero_sha1(ref->new_sha1)) |
219 | continue; | |
220 | new_refs++; | |
7f8e9828 LT |
221 | strcpy(old_hex, sha1_to_hex(ref->old_sha1)); |
222 | new_hex = sha1_to_hex(ref->new_sha1); | |
223 | packet_write(out, "%s %s %s", old_hex, new_hex, ref->name); | |
224 | fprintf(stderr, "'%s': updating from %s to %s\n", ref->name, old_hex, new_hex); | |
61221472 | 225 | } |
7f8e9828 | 226 | |
f3a3214e | 227 | packet_flush(out); |
584c6cc9 | 228 | if (new_refs) |
94fdb7aa | 229 | pack_objects(out, ref_list); |
61221472 LT |
230 | close(out); |
231 | return 0; | |
232 | } | |
233 | ||
61221472 LT |
234 | int main(int argc, char **argv) |
235 | { | |
236 | int i, nr_heads = 0; | |
237 | char *dest = NULL; | |
238 | char **heads = NULL; | |
7f8e9828 LT |
239 | int fd[2], ret; |
240 | pid_t pid; | |
61221472 LT |
241 | |
242 | argv++; | |
d089391c LT |
243 | for (i = 1; i < argc; i++, argv++) { |
244 | char *arg = *argv; | |
61221472 LT |
245 | |
246 | if (*arg == '-') { | |
247 | if (!strncmp(arg, "--exec=", 7)) { | |
248 | exec = arg + 7; | |
249 | continue; | |
250 | } | |
d089391c LT |
251 | if (!strcmp(arg, "--all")) { |
252 | send_all = 1; | |
253 | continue; | |
254 | } | |
61221472 LT |
255 | usage(send_pack_usage); |
256 | } | |
d089391c LT |
257 | if (!dest) { |
258 | dest = arg; | |
259 | continue; | |
260 | } | |
61221472 | 261 | heads = argv; |
d089391c | 262 | nr_heads = argc - i; |
61221472 LT |
263 | break; |
264 | } | |
265 | if (!dest) | |
266 | usage(send_pack_usage); | |
f7192598 | 267 | pid = git_connect(fd, dest, exec); |
7f8e9828 | 268 | if (pid < 0) |
61221472 | 269 | return 1; |
d0efc8a7 | 270 | ret = send_pack(fd[0], fd[1], nr_heads, heads); |
7f8e9828 LT |
271 | close(fd[0]); |
272 | close(fd[1]); | |
f7192598 | 273 | finish_connect(pid); |
7f8e9828 | 274 | return ret; |
61221472 | 275 | } |