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Commit | Line | Data |
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95fc7512 | 1 | #include "cache.h" |
85023577 | 2 | #include "refs.h" |
cf0adba7 JH |
3 | #include "object.h" |
4 | #include "tag.h" | |
7155b727 | 5 | #include "dir.h" |
95fc7512 | 6 | |
f4204ab9 JH |
7 | /* ISSYMREF=01 and ISPACKED=02 are public interfaces */ |
8 | #define REF_KNOWS_PEELED 04 | |
9 | ||
e1e22e37 LT |
10 | struct ref_list { |
11 | struct ref_list *next; | |
f4204ab9 | 12 | unsigned char flag; /* ISSYMREF? ISPACKED? */ |
e1e22e37 | 13 | unsigned char sha1[20]; |
f4204ab9 | 14 | unsigned char peeled[20]; |
e1e22e37 LT |
15 | char name[FLEX_ARRAY]; |
16 | }; | |
17 | ||
f4204ab9 | 18 | static const char *parse_ref_line(char *line, unsigned char *sha1) |
e1e22e37 LT |
19 | { |
20 | /* | |
21 | * 42: the answer to everything. | |
22 | * | |
23 | * In this case, it happens to be the answer to | |
24 | * 40 (length of sha1 hex representation) | |
25 | * +1 (space in between hex and name) | |
26 | * +1 (newline at the end of the line) | |
27 | */ | |
28 | int len = strlen(line) - 42; | |
29 | ||
30 | if (len <= 0) | |
31 | return NULL; | |
32 | if (get_sha1_hex(line, sha1) < 0) | |
33 | return NULL; | |
34 | if (!isspace(line[40])) | |
35 | return NULL; | |
36 | line += 41; | |
f4204ab9 JH |
37 | if (isspace(*line)) |
38 | return NULL; | |
e1e22e37 LT |
39 | if (line[len] != '\n') |
40 | return NULL; | |
41 | line[len] = 0; | |
cf0adba7 | 42 | |
e1e22e37 LT |
43 | return line; |
44 | } | |
45 | ||
8da19775 | 46 | static struct ref_list *add_ref(const char *name, const unsigned char *sha1, |
f4204ab9 JH |
47 | int flag, struct ref_list *list, |
48 | struct ref_list **new_entry) | |
e1e22e37 LT |
49 | { |
50 | int len; | |
c774aab9 | 51 | struct ref_list *entry; |
e1e22e37 LT |
52 | |
53 | /* Allocate it and add it in.. */ | |
54 | len = strlen(name) + 1; | |
55 | entry = xmalloc(sizeof(struct ref_list) + len); | |
56 | hashcpy(entry->sha1, sha1); | |
f4204ab9 | 57 | hashclr(entry->peeled); |
e1e22e37 | 58 | memcpy(entry->name, name, len); |
8da19775 | 59 | entry->flag = flag; |
c774aab9 | 60 | entry->next = list; |
f4204ab9 JH |
61 | if (new_entry) |
62 | *new_entry = entry; | |
c774aab9 JP |
63 | return entry; |
64 | } | |
65 | ||
66 | /* merge sort the ref list */ | |
67 | static struct ref_list *sort_ref_list(struct ref_list *list) | |
68 | { | |
69 | int psize, qsize, last_merge_count, cmp; | |
70 | struct ref_list *p, *q, *l, *e; | |
71 | struct ref_list *new_list = list; | |
72 | int k = 1; | |
73 | int merge_count = 0; | |
74 | ||
75 | if (!list) | |
76 | return list; | |
77 | ||
78 | do { | |
79 | last_merge_count = merge_count; | |
80 | merge_count = 0; | |
81 | ||
82 | psize = 0; | |
83 | ||
84 | p = new_list; | |
85 | q = new_list; | |
86 | new_list = NULL; | |
87 | l = NULL; | |
88 | ||
89 | while (p) { | |
90 | merge_count++; | |
91 | ||
92 | while (psize < k && q->next) { | |
93 | q = q->next; | |
94 | psize++; | |
95 | } | |
96 | qsize = k; | |
97 | ||
98 | while ((psize > 0) || (qsize > 0 && q)) { | |
99 | if (qsize == 0 || !q) { | |
100 | e = p; | |
101 | p = p->next; | |
102 | psize--; | |
103 | } else if (psize == 0) { | |
104 | e = q; | |
105 | q = q->next; | |
106 | qsize--; | |
107 | } else { | |
108 | cmp = strcmp(q->name, p->name); | |
109 | if (cmp < 0) { | |
110 | e = q; | |
111 | q = q->next; | |
112 | qsize--; | |
113 | } else if (cmp > 0) { | |
114 | e = p; | |
115 | p = p->next; | |
116 | psize--; | |
117 | } else { | |
118 | if (hashcmp(q->sha1, p->sha1)) | |
119 | die("Duplicated ref, and SHA1s don't match: %s", | |
120 | q->name); | |
121 | warning("Duplicated ref: %s", q->name); | |
122 | e = q; | |
123 | q = q->next; | |
124 | qsize--; | |
125 | free(e); | |
126 | e = p; | |
127 | p = p->next; | |
128 | psize--; | |
129 | } | |
130 | } | |
131 | ||
132 | e->next = NULL; | |
133 | ||
134 | if (l) | |
135 | l->next = e; | |
136 | if (!new_list) | |
137 | new_list = e; | |
138 | l = e; | |
139 | } | |
140 | ||
141 | p = q; | |
142 | }; | |
143 | ||
144 | k = k * 2; | |
145 | } while ((last_merge_count != merge_count) || (last_merge_count != 1)); | |
146 | ||
147 | return new_list; | |
e1e22e37 LT |
148 | } |
149 | ||
5e290ff7 JH |
150 | /* |
151 | * Future: need to be in "struct repository" | |
152 | * when doing a full libification. | |
153 | */ | |
4175e9e3 | 154 | static struct cached_refs { |
5e290ff7 JH |
155 | char did_loose; |
156 | char did_packed; | |
157 | struct ref_list *loose; | |
158 | struct ref_list *packed; | |
159 | } cached_refs; | |
0ae91be0 | 160 | static struct ref_list *current_ref; |
5e290ff7 | 161 | |
e142a3c6 DB |
162 | static struct ref_list *extra_refs; |
163 | ||
5e290ff7 JH |
164 | static void free_ref_list(struct ref_list *list) |
165 | { | |
166 | struct ref_list *next; | |
167 | for ( ; list; list = next) { | |
168 | next = list->next; | |
169 | free(list); | |
170 | } | |
171 | } | |
172 | ||
173 | static void invalidate_cached_refs(void) | |
e1e22e37 | 174 | { |
5e290ff7 JH |
175 | struct cached_refs *ca = &cached_refs; |
176 | ||
177 | if (ca->did_loose && ca->loose) | |
178 | free_ref_list(ca->loose); | |
179 | if (ca->did_packed && ca->packed) | |
180 | free_ref_list(ca->packed); | |
181 | ca->loose = ca->packed = NULL; | |
182 | ca->did_loose = ca->did_packed = 0; | |
183 | } | |
e1e22e37 | 184 | |
f4204ab9 JH |
185 | static void read_packed_refs(FILE *f, struct cached_refs *cached_refs) |
186 | { | |
187 | struct ref_list *list = NULL; | |
188 | struct ref_list *last = NULL; | |
189 | char refline[PATH_MAX]; | |
190 | int flag = REF_ISPACKED; | |
191 | ||
192 | while (fgets(refline, sizeof(refline), f)) { | |
193 | unsigned char sha1[20]; | |
194 | const char *name; | |
195 | static const char header[] = "# pack-refs with:"; | |
196 | ||
197 | if (!strncmp(refline, header, sizeof(header)-1)) { | |
198 | const char *traits = refline + sizeof(header) - 1; | |
199 | if (strstr(traits, " peeled ")) | |
200 | flag |= REF_KNOWS_PEELED; | |
201 | /* perhaps other traits later as well */ | |
202 | continue; | |
203 | } | |
204 | ||
205 | name = parse_ref_line(refline, sha1); | |
206 | if (name) { | |
207 | list = add_ref(name, sha1, flag, list, &last); | |
208 | continue; | |
209 | } | |
210 | if (last && | |
211 | refline[0] == '^' && | |
212 | strlen(refline) == 42 && | |
213 | refline[41] == '\n' && | |
214 | !get_sha1_hex(refline + 1, sha1)) | |
215 | hashcpy(last->peeled, sha1); | |
216 | } | |
c774aab9 | 217 | cached_refs->packed = sort_ref_list(list); |
f4204ab9 JH |
218 | } |
219 | ||
e142a3c6 DB |
220 | void add_extra_ref(const char *name, const unsigned char *sha1, int flag) |
221 | { | |
222 | extra_refs = add_ref(name, sha1, flag, extra_refs, NULL); | |
223 | } | |
224 | ||
225 | void clear_extra_refs(void) | |
226 | { | |
227 | free_ref_list(extra_refs); | |
228 | extra_refs = NULL; | |
229 | } | |
230 | ||
5e290ff7 JH |
231 | static struct ref_list *get_packed_refs(void) |
232 | { | |
233 | if (!cached_refs.did_packed) { | |
e1e22e37 | 234 | FILE *f = fopen(git_path("packed-refs"), "r"); |
f4204ab9 | 235 | cached_refs.packed = NULL; |
e1e22e37 | 236 | if (f) { |
f4204ab9 | 237 | read_packed_refs(f, &cached_refs); |
e1e22e37 | 238 | fclose(f); |
e1e22e37 | 239 | } |
5e290ff7 | 240 | cached_refs.did_packed = 1; |
e1e22e37 | 241 | } |
5e290ff7 | 242 | return cached_refs.packed; |
e1e22e37 LT |
243 | } |
244 | ||
245 | static struct ref_list *get_ref_dir(const char *base, struct ref_list *list) | |
246 | { | |
247 | DIR *dir = opendir(git_path("%s", base)); | |
248 | ||
249 | if (dir) { | |
250 | struct dirent *de; | |
251 | int baselen = strlen(base); | |
ed378ec7 | 252 | char *ref = xmalloc(baselen + 257); |
e1e22e37 | 253 | |
ed378ec7 | 254 | memcpy(ref, base, baselen); |
e1e22e37 | 255 | if (baselen && base[baselen-1] != '/') |
ed378ec7 | 256 | ref[baselen++] = '/'; |
e1e22e37 LT |
257 | |
258 | while ((de = readdir(dir)) != NULL) { | |
259 | unsigned char sha1[20]; | |
260 | struct stat st; | |
8da19775 | 261 | int flag; |
e1e22e37 LT |
262 | int namelen; |
263 | ||
264 | if (de->d_name[0] == '.') | |
265 | continue; | |
266 | namelen = strlen(de->d_name); | |
267 | if (namelen > 255) | |
268 | continue; | |
269 | if (has_extension(de->d_name, ".lock")) | |
270 | continue; | |
ed378ec7 LT |
271 | memcpy(ref + baselen, de->d_name, namelen+1); |
272 | if (stat(git_path("%s", ref), &st) < 0) | |
e1e22e37 LT |
273 | continue; |
274 | if (S_ISDIR(st.st_mode)) { | |
ed378ec7 | 275 | list = get_ref_dir(ref, list); |
e1e22e37 LT |
276 | continue; |
277 | } | |
f8948e2f JH |
278 | if (!resolve_ref(ref, sha1, 1, &flag)) |
279 | hashclr(sha1); | |
f4204ab9 | 280 | list = add_ref(ref, sha1, flag, list, NULL); |
e1e22e37 | 281 | } |
ed378ec7 | 282 | free(ref); |
e1e22e37 LT |
283 | closedir(dir); |
284 | } | |
c774aab9 | 285 | return sort_ref_list(list); |
e1e22e37 LT |
286 | } |
287 | ||
f8948e2f JH |
288 | struct warn_if_dangling_data { |
289 | const char *refname; | |
290 | const char *msg_fmt; | |
291 | }; | |
292 | ||
293 | static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1, | |
294 | int flags, void *cb_data) | |
295 | { | |
296 | struct warn_if_dangling_data *d = cb_data; | |
297 | const char *resolves_to; | |
298 | unsigned char junk[20]; | |
299 | ||
300 | if (!(flags & REF_ISSYMREF)) | |
301 | return 0; | |
302 | ||
303 | resolves_to = resolve_ref(refname, junk, 0, NULL); | |
304 | if (!resolves_to || strcmp(resolves_to, d->refname)) | |
305 | return 0; | |
306 | ||
307 | printf(d->msg_fmt, refname); | |
308 | return 0; | |
309 | } | |
310 | ||
311 | void warn_dangling_symref(const char *msg_fmt, const char *refname) | |
312 | { | |
313 | struct warn_if_dangling_data data = { refname, msg_fmt }; | |
314 | for_each_rawref(warn_if_dangling_symref, &data); | |
315 | } | |
316 | ||
e1e22e37 LT |
317 | static struct ref_list *get_loose_refs(void) |
318 | { | |
5e290ff7 JH |
319 | if (!cached_refs.did_loose) { |
320 | cached_refs.loose = get_ref_dir("refs", NULL); | |
321 | cached_refs.did_loose = 1; | |
e1e22e37 | 322 | } |
5e290ff7 | 323 | return cached_refs.loose; |
e1e22e37 LT |
324 | } |
325 | ||
ca8db142 LT |
326 | /* We allow "recursive" symbolic refs. Only within reason, though */ |
327 | #define MAXDEPTH 5 | |
0ebde32c LT |
328 | #define MAXREFLEN (1024) |
329 | ||
330 | static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result) | |
331 | { | |
332 | FILE *f; | |
333 | struct cached_refs refs; | |
334 | struct ref_list *ref; | |
335 | int retval; | |
336 | ||
337 | strcpy(name + pathlen, "packed-refs"); | |
338 | f = fopen(name, "r"); | |
339 | if (!f) | |
340 | return -1; | |
341 | read_packed_refs(f, &refs); | |
342 | fclose(f); | |
343 | ref = refs.packed; | |
344 | retval = -1; | |
345 | while (ref) { | |
346 | if (!strcmp(ref->name, refname)) { | |
347 | retval = 0; | |
348 | memcpy(result, ref->sha1, 20); | |
349 | break; | |
350 | } | |
351 | ref = ref->next; | |
352 | } | |
353 | free_ref_list(refs.packed); | |
354 | return retval; | |
355 | } | |
356 | ||
357 | static int resolve_gitlink_ref_recursive(char *name, int pathlen, const char *refname, unsigned char *result, int recursion) | |
358 | { | |
359 | int fd, len = strlen(refname); | |
360 | char buffer[128], *p; | |
361 | ||
362 | if (recursion > MAXDEPTH || len > MAXREFLEN) | |
363 | return -1; | |
364 | memcpy(name + pathlen, refname, len+1); | |
365 | fd = open(name, O_RDONLY); | |
366 | if (fd < 0) | |
367 | return resolve_gitlink_packed_ref(name, pathlen, refname, result); | |
368 | ||
369 | len = read(fd, buffer, sizeof(buffer)-1); | |
370 | close(fd); | |
371 | if (len < 0) | |
372 | return -1; | |
373 | while (len && isspace(buffer[len-1])) | |
374 | len--; | |
375 | buffer[len] = 0; | |
376 | ||
377 | /* Was it a detached head or an old-fashioned symlink? */ | |
378 | if (!get_sha1_hex(buffer, result)) | |
379 | return 0; | |
380 | ||
381 | /* Symref? */ | |
382 | if (strncmp(buffer, "ref:", 4)) | |
383 | return -1; | |
384 | p = buffer + 4; | |
385 | while (isspace(*p)) | |
386 | p++; | |
387 | ||
388 | return resolve_gitlink_ref_recursive(name, pathlen, p, result, recursion+1); | |
389 | } | |
390 | ||
391 | int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result) | |
392 | { | |
393 | int len = strlen(path), retval; | |
394 | char *gitdir; | |
842abf06 | 395 | const char *tmp; |
0ebde32c LT |
396 | |
397 | while (len && path[len-1] == '/') | |
398 | len--; | |
399 | if (!len) | |
400 | return -1; | |
401 | gitdir = xmalloc(len + MAXREFLEN + 8); | |
402 | memcpy(gitdir, path, len); | |
842abf06 LH |
403 | memcpy(gitdir + len, "/.git", 6); |
404 | len += 5; | |
405 | ||
406 | tmp = read_gitfile_gently(gitdir); | |
407 | if (tmp) { | |
408 | free(gitdir); | |
409 | len = strlen(tmp); | |
410 | gitdir = xmalloc(len + MAXREFLEN + 3); | |
411 | memcpy(gitdir, tmp, len); | |
412 | } | |
413 | gitdir[len] = '/'; | |
414 | gitdir[++len] = '\0'; | |
415 | retval = resolve_gitlink_ref_recursive(gitdir, len, refname, result, 0); | |
0ebde32c LT |
416 | free(gitdir); |
417 | return retval; | |
418 | } | |
ca8db142 | 419 | |
4886b89f CC |
420 | /* |
421 | * If the "reading" argument is set, this function finds out what _object_ | |
422 | * the ref points at by "reading" the ref. The ref, if it is not symbolic, | |
423 | * has to exist, and if it is symbolic, it has to point at an existing ref, | |
424 | * because the "read" goes through the symref to the ref it points at. | |
425 | * | |
426 | * The access that is not "reading" may often be "writing", but does not | |
427 | * have to; it can be merely checking _where it leads to_. If it is a | |
428 | * prelude to "writing" to the ref, a write to a symref that points at | |
429 | * yet-to-be-born ref will create the real ref pointed by the symref. | |
430 | * reading=0 allows the caller to check where such a symref leads to. | |
431 | */ | |
8da19775 | 432 | const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag) |
8a65ff76 | 433 | { |
0104ca09 HO |
434 | int depth = MAXDEPTH; |
435 | ssize_t len; | |
a876ed83 | 436 | char buffer[256]; |
ed378ec7 | 437 | static char ref_buffer[256]; |
ca8db142 | 438 | |
8da19775 JH |
439 | if (flag) |
440 | *flag = 0; | |
441 | ||
a876ed83 | 442 | for (;;) { |
958a4789 | 443 | char path[PATH_MAX]; |
a876ed83 JH |
444 | struct stat st; |
445 | char *buf; | |
446 | int fd; | |
8a65ff76 | 447 | |
a876ed83 JH |
448 | if (--depth < 0) |
449 | return NULL; | |
ca8db142 | 450 | |
958a4789 | 451 | git_snpath(path, sizeof(path), "%s", ref); |
4886b89f | 452 | /* Special case: non-existing file. */ |
a876ed83 | 453 | if (lstat(path, &st) < 0) { |
434cd0cd LT |
454 | struct ref_list *list = get_packed_refs(); |
455 | while (list) { | |
f4204ab9 | 456 | if (!strcmp(ref, list->name)) { |
434cd0cd | 457 | hashcpy(sha1, list->sha1); |
8da19775 JH |
458 | if (flag) |
459 | *flag |= REF_ISPACKED; | |
434cd0cd LT |
460 | return ref; |
461 | } | |
462 | list = list->next; | |
463 | } | |
a876ed83 JH |
464 | if (reading || errno != ENOENT) |
465 | return NULL; | |
e702496e | 466 | hashclr(sha1); |
ed378ec7 | 467 | return ref; |
a876ed83 | 468 | } |
ca8db142 | 469 | |
a876ed83 JH |
470 | /* Follow "normalized" - ie "refs/.." symlinks by hand */ |
471 | if (S_ISLNK(st.st_mode)) { | |
472 | len = readlink(path, buffer, sizeof(buffer)-1); | |
473 | if (len >= 5 && !memcmp("refs/", buffer, 5)) { | |
ed378ec7 LT |
474 | buffer[len] = 0; |
475 | strcpy(ref_buffer, buffer); | |
476 | ref = ref_buffer; | |
8da19775 JH |
477 | if (flag) |
478 | *flag |= REF_ISSYMREF; | |
a876ed83 JH |
479 | continue; |
480 | } | |
ca8db142 | 481 | } |
a876ed83 | 482 | |
7a21632f DS |
483 | /* Is it a directory? */ |
484 | if (S_ISDIR(st.st_mode)) { | |
485 | errno = EISDIR; | |
486 | return NULL; | |
487 | } | |
488 | ||
a876ed83 JH |
489 | /* |
490 | * Anything else, just open it and try to use it as | |
491 | * a ref | |
492 | */ | |
493 | fd = open(path, O_RDONLY); | |
494 | if (fd < 0) | |
495 | return NULL; | |
93d26e4c | 496 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
a876ed83 JH |
497 | close(fd); |
498 | ||
499 | /* | |
500 | * Is it a symbolic ref? | |
501 | */ | |
502 | if (len < 4 || memcmp("ref:", buffer, 4)) | |
503 | break; | |
504 | buf = buffer + 4; | |
505 | len -= 4; | |
506 | while (len && isspace(*buf)) | |
507 | buf++, len--; | |
508 | while (len && isspace(buf[len-1])) | |
ed378ec7 LT |
509 | len--; |
510 | buf[len] = 0; | |
511 | memcpy(ref_buffer, buf, len + 1); | |
512 | ref = ref_buffer; | |
8da19775 JH |
513 | if (flag) |
514 | *flag |= REF_ISSYMREF; | |
8a65ff76 | 515 | } |
a876ed83 JH |
516 | if (len < 40 || get_sha1_hex(buffer, sha1)) |
517 | return NULL; | |
ed378ec7 | 518 | return ref; |
a876ed83 JH |
519 | } |
520 | ||
ed378ec7 | 521 | int read_ref(const char *ref, unsigned char *sha1) |
a876ed83 | 522 | { |
8da19775 | 523 | if (resolve_ref(ref, sha1, 1, NULL)) |
a876ed83 JH |
524 | return 0; |
525 | return -1; | |
8a65ff76 LT |
526 | } |
527 | ||
f8948e2f | 528 | #define DO_FOR_EACH_INCLUDE_BROKEN 01 |
ef06b918 | 529 | static int do_one_ref(const char *base, each_ref_fn fn, int trim, |
f8948e2f | 530 | int flags, void *cb_data, struct ref_list *entry) |
ef06b918 JH |
531 | { |
532 | if (strncmp(base, entry->name, trim)) | |
533 | return 0; | |
eafb4526 JH |
534 | /* Is this a "negative ref" that represents a deleted ref? */ |
535 | if (is_null_sha1(entry->sha1)) | |
536 | return 0; | |
f8948e2f | 537 | if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { |
f8948e2f JH |
538 | if (!has_sha1_file(entry->sha1)) { |
539 | error("%s does not point to a valid object!", entry->name); | |
540 | return 0; | |
541 | } | |
ef06b918 | 542 | } |
0ae91be0 | 543 | current_ref = entry; |
ef06b918 JH |
544 | return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); |
545 | } | |
546 | ||
cf0adba7 JH |
547 | int peel_ref(const char *ref, unsigned char *sha1) |
548 | { | |
549 | int flag; | |
550 | unsigned char base[20]; | |
551 | struct object *o; | |
552 | ||
0ae91be0 SP |
553 | if (current_ref && (current_ref->name == ref |
554 | || !strcmp(current_ref->name, ref))) { | |
555 | if (current_ref->flag & REF_KNOWS_PEELED) { | |
556 | hashcpy(sha1, current_ref->peeled); | |
557 | return 0; | |
558 | } | |
559 | hashcpy(base, current_ref->sha1); | |
560 | goto fallback; | |
561 | } | |
562 | ||
cf0adba7 JH |
563 | if (!resolve_ref(ref, base, 1, &flag)) |
564 | return -1; | |
565 | ||
566 | if ((flag & REF_ISPACKED)) { | |
567 | struct ref_list *list = get_packed_refs(); | |
cf0adba7 JH |
568 | |
569 | while (list) { | |
f4204ab9 JH |
570 | if (!strcmp(list->name, ref)) { |
571 | if (list->flag & REF_KNOWS_PEELED) { | |
572 | hashcpy(sha1, list->peeled); | |
573 | return 0; | |
574 | } | |
575 | /* older pack-refs did not leave peeled ones */ | |
576 | break; | |
cf0adba7 JH |
577 | } |
578 | list = list->next; | |
579 | } | |
cf0adba7 JH |
580 | } |
581 | ||
0ae91be0 | 582 | fallback: |
cf0adba7 | 583 | o = parse_object(base); |
8c87dc77 | 584 | if (o && o->type == OBJ_TAG) { |
cf0adba7 JH |
585 | o = deref_tag(o, ref, 0); |
586 | if (o) { | |
587 | hashcpy(sha1, o->sha1); | |
588 | return 0; | |
589 | } | |
590 | } | |
591 | return -1; | |
592 | } | |
593 | ||
8da19775 | 594 | static int do_for_each_ref(const char *base, each_ref_fn fn, int trim, |
f8948e2f | 595 | int flags, void *cb_data) |
8a65ff76 | 596 | { |
0ae91be0 | 597 | int retval = 0; |
e1e22e37 LT |
598 | struct ref_list *packed = get_packed_refs(); |
599 | struct ref_list *loose = get_loose_refs(); | |
8a65ff76 | 600 | |
e142a3c6 DB |
601 | struct ref_list *extra; |
602 | ||
603 | for (extra = extra_refs; extra; extra = extra->next) | |
f8948e2f | 604 | retval = do_one_ref(base, fn, trim, flags, cb_data, extra); |
e142a3c6 | 605 | |
e1e22e37 LT |
606 | while (packed && loose) { |
607 | struct ref_list *entry; | |
608 | int cmp = strcmp(packed->name, loose->name); | |
609 | if (!cmp) { | |
610 | packed = packed->next; | |
611 | continue; | |
6cada6a9 | 612 | } |
e1e22e37 LT |
613 | if (cmp > 0) { |
614 | entry = loose; | |
615 | loose = loose->next; | |
616 | } else { | |
617 | entry = packed; | |
618 | packed = packed->next; | |
619 | } | |
f8948e2f | 620 | retval = do_one_ref(base, fn, trim, flags, cb_data, entry); |
e1e22e37 | 621 | if (retval) |
0ae91be0 | 622 | goto end_each; |
e1e22e37 | 623 | } |
8a65ff76 | 624 | |
ef06b918 | 625 | for (packed = packed ? packed : loose; packed; packed = packed->next) { |
f8948e2f | 626 | retval = do_one_ref(base, fn, trim, flags, cb_data, packed); |
ef06b918 | 627 | if (retval) |
0ae91be0 | 628 | goto end_each; |
8a65ff76 | 629 | } |
0ae91be0 SP |
630 | |
631 | end_each: | |
632 | current_ref = NULL; | |
633 | return retval; | |
8a65ff76 LT |
634 | } |
635 | ||
cb5d709f | 636 | int head_ref(each_ref_fn fn, void *cb_data) |
723c31fe LT |
637 | { |
638 | unsigned char sha1[20]; | |
8da19775 JH |
639 | int flag; |
640 | ||
641 | if (resolve_ref("HEAD", sha1, 1, &flag)) | |
642 | return fn("HEAD", sha1, flag, cb_data); | |
2f34ba32 | 643 | return 0; |
723c31fe LT |
644 | } |
645 | ||
cb5d709f | 646 | int for_each_ref(each_ref_fn fn, void *cb_data) |
8a65ff76 | 647 | { |
f8948e2f | 648 | return do_for_each_ref("refs/", fn, 0, 0, cb_data); |
a62be77f SE |
649 | } |
650 | ||
2a8177b6 CC |
651 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) |
652 | { | |
653 | return do_for_each_ref(prefix, fn, strlen(prefix), 0, cb_data); | |
654 | } | |
655 | ||
cb5d709f | 656 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 657 | { |
2a8177b6 | 658 | return for_each_ref_in("refs/tags/", fn, cb_data); |
a62be77f SE |
659 | } |
660 | ||
cb5d709f | 661 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 662 | { |
2a8177b6 | 663 | return for_each_ref_in("refs/heads/", fn, cb_data); |
a62be77f SE |
664 | } |
665 | ||
cb5d709f | 666 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 667 | { |
2a8177b6 | 668 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
f8948e2f JH |
669 | } |
670 | ||
29268700 CC |
671 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) |
672 | { | |
673 | return do_for_each_ref("refs/replace/", fn, 13, 0, cb_data); | |
674 | } | |
675 | ||
f8948e2f JH |
676 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
677 | { | |
678 | return do_for_each_ref("refs/", fn, 0, | |
679 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); | |
8a65ff76 LT |
680 | } |
681 | ||
03feddd6 JH |
682 | /* |
683 | * Make sure "ref" is something reasonable to have under ".git/refs/"; | |
684 | * We do not like it if: | |
685 | * | |
686 | * - any path component of it begins with ".", or | |
687 | * - it has double dots "..", or | |
688 | * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or | |
689 | * - it ends with a "/". | |
3e262b95 | 690 | * - it ends with ".lock" |
a4c2e699 | 691 | * - it contains a "\" (backslash) |
03feddd6 JH |
692 | */ |
693 | ||
694 | static inline int bad_ref_char(int ch) | |
695 | { | |
8558fd9e | 696 | if (((unsigned) ch) <= ' ' || |
a4c2e699 | 697 | ch == '~' || ch == '^' || ch == ':' || ch == '\\') |
8558fd9e DB |
698 | return 1; |
699 | /* 2.13 Pattern Matching Notation */ | |
700 | if (ch == '?' || ch == '[') /* Unsupported */ | |
701 | return 1; | |
702 | if (ch == '*') /* Supported at the end */ | |
703 | return 2; | |
704 | return 0; | |
03feddd6 JH |
705 | } |
706 | ||
95fc7512 DB |
707 | int check_ref_format(const char *ref) |
708 | { | |
cbdffe40 | 709 | int ch, level, bad_type, last; |
abd2bde7 | 710 | int ret = CHECK_REF_FORMAT_OK; |
03feddd6 JH |
711 | const char *cp = ref; |
712 | ||
713 | level = 0; | |
714 | while (1) { | |
715 | while ((ch = *cp++) == '/') | |
716 | ; /* tolerate duplicated slashes */ | |
717 | if (!ch) | |
5f7b202a JH |
718 | /* should not end with slashes */ |
719 | return CHECK_REF_FORMAT_ERROR; | |
03feddd6 JH |
720 | |
721 | /* we are at the beginning of the path component */ | |
8558fd9e | 722 | if (ch == '.') |
5f7b202a | 723 | return CHECK_REF_FORMAT_ERROR; |
8558fd9e DB |
724 | bad_type = bad_ref_char(ch); |
725 | if (bad_type) { | |
abd2bde7 DB |
726 | if (bad_type == 2 && (!*cp || *cp == '/') && |
727 | ret == CHECK_REF_FORMAT_OK) | |
728 | ret = CHECK_REF_FORMAT_WILDCARD; | |
729 | else | |
730 | return CHECK_REF_FORMAT_ERROR; | |
8558fd9e | 731 | } |
03feddd6 | 732 | |
cbdffe40 | 733 | last = ch; |
03feddd6 JH |
734 | /* scan the rest of the path component */ |
735 | while ((ch = *cp++) != 0) { | |
8558fd9e | 736 | bad_type = bad_ref_char(ch); |
cbdffe40 | 737 | if (bad_type) |
08fbdb30 | 738 | return CHECK_REF_FORMAT_ERROR; |
03feddd6 JH |
739 | if (ch == '/') |
740 | break; | |
cbdffe40 JH |
741 | if (last == '.' && ch == '.') |
742 | return CHECK_REF_FORMAT_ERROR; | |
743 | if (last == '@' && ch == '{') | |
5f7b202a | 744 | return CHECK_REF_FORMAT_ERROR; |
cbdffe40 | 745 | last = ch; |
03feddd6 JH |
746 | } |
747 | level++; | |
748 | if (!ch) { | |
cbdffe40 JH |
749 | if (ref <= cp - 2 && cp[-2] == '.') |
750 | return CHECK_REF_FORMAT_ERROR; | |
03feddd6 | 751 | if (level < 2) |
5f7b202a | 752 | return CHECK_REF_FORMAT_ONELEVEL; |
3e262b95 SP |
753 | if (has_extension(ref, ".lock")) |
754 | return CHECK_REF_FORMAT_ERROR; | |
abd2bde7 | 755 | return ret; |
03feddd6 JH |
756 | } |
757 | } | |
95fc7512 DB |
758 | } |
759 | ||
4577e483 | 760 | const char *prettify_refname(const char *name) |
a9c37a72 | 761 | { |
a9c37a72 DB |
762 | return name + ( |
763 | !prefixcmp(name, "refs/heads/") ? 11 : | |
764 | !prefixcmp(name, "refs/tags/") ? 10 : | |
765 | !prefixcmp(name, "refs/remotes/") ? 13 : | |
766 | 0); | |
767 | } | |
768 | ||
79803322 SP |
769 | const char *ref_rev_parse_rules[] = { |
770 | "%.*s", | |
771 | "refs/%.*s", | |
772 | "refs/tags/%.*s", | |
773 | "refs/heads/%.*s", | |
774 | "refs/remotes/%.*s", | |
775 | "refs/remotes/%.*s/HEAD", | |
776 | NULL | |
777 | }; | |
778 | ||
605b4978 SP |
779 | const char *ref_fetch_rules[] = { |
780 | "%.*s", | |
781 | "refs/%.*s", | |
782 | "refs/heads/%.*s", | |
783 | NULL | |
784 | }; | |
785 | ||
79803322 SP |
786 | int refname_match(const char *abbrev_name, const char *full_name, const char **rules) |
787 | { | |
788 | const char **p; | |
789 | const int abbrev_name_len = strlen(abbrev_name); | |
790 | ||
791 | for (p = rules; *p; p++) { | |
792 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { | |
793 | return 1; | |
794 | } | |
795 | } | |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
e5f38ec3 | 800 | static struct ref_lock *verify_lock(struct ref_lock *lock, |
4bd18c43 SP |
801 | const unsigned char *old_sha1, int mustexist) |
802 | { | |
8da19775 | 803 | if (!resolve_ref(lock->ref_name, lock->old_sha1, mustexist, NULL)) { |
434cd0cd | 804 | error("Can't verify ref %s", lock->ref_name); |
4bd18c43 SP |
805 | unlock_ref(lock); |
806 | return NULL; | |
807 | } | |
a89fccd2 | 808 | if (hashcmp(lock->old_sha1, old_sha1)) { |
434cd0cd | 809 | error("Ref %s is at %s but expected %s", lock->ref_name, |
4bd18c43 SP |
810 | sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1)); |
811 | unlock_ref(lock); | |
812 | return NULL; | |
813 | } | |
814 | return lock; | |
815 | } | |
816 | ||
7155b727 | 817 | static int remove_empty_directories(const char *file) |
bc7127ef JH |
818 | { |
819 | /* we want to create a file but there is a directory there; | |
820 | * if that is an empty directory (or a directory that contains | |
821 | * only empty directories), remove them. | |
822 | */ | |
7155b727 JS |
823 | struct strbuf path; |
824 | int result; | |
bc7127ef | 825 | |
7155b727 JS |
826 | strbuf_init(&path, 20); |
827 | strbuf_addstr(&path, file); | |
828 | ||
a0f4afbe | 829 | result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY); |
7155b727 JS |
830 | |
831 | strbuf_release(&path); | |
832 | ||
833 | return result; | |
bc7127ef JH |
834 | } |
835 | ||
c976d415 LH |
836 | static int is_refname_available(const char *ref, const char *oldref, |
837 | struct ref_list *list, int quiet) | |
838 | { | |
839 | int namlen = strlen(ref); /* e.g. 'foo/bar' */ | |
840 | while (list) { | |
841 | /* list->name could be 'foo' or 'foo/bar/baz' */ | |
842 | if (!oldref || strcmp(oldref, list->name)) { | |
843 | int len = strlen(list->name); | |
844 | int cmplen = (namlen < len) ? namlen : len; | |
845 | const char *lead = (namlen < len) ? list->name : ref; | |
846 | if (!strncmp(ref, list->name, cmplen) && | |
847 | lead[cmplen] == '/') { | |
848 | if (!quiet) | |
849 | error("'%s' exists; cannot create '%s'", | |
850 | list->name, ref); | |
851 | return 0; | |
852 | } | |
853 | } | |
854 | list = list->next; | |
855 | } | |
856 | return 1; | |
857 | } | |
858 | ||
68db31cc | 859 | static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p) |
4bd18c43 | 860 | { |
434cd0cd | 861 | char *ref_file; |
ed378ec7 | 862 | const char *orig_ref = ref; |
4bd18c43 | 863 | struct ref_lock *lock; |
5cc3cef9 | 864 | int last_errno = 0; |
acd3b9ec | 865 | int type, lflags; |
4431fcc4 | 866 | int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); |
5bdd8d4a | 867 | int missing = 0; |
4bd18c43 SP |
868 | |
869 | lock = xcalloc(1, sizeof(struct ref_lock)); | |
870 | lock->lock_fd = -1; | |
871 | ||
68db31cc | 872 | ref = resolve_ref(ref, lock->old_sha1, mustexist, &type); |
bc7127ef JH |
873 | if (!ref && errno == EISDIR) { |
874 | /* we are trying to lock foo but we used to | |
875 | * have foo/bar which now does not exist; | |
876 | * it is normal for the empty directory 'foo' | |
877 | * to remain. | |
878 | */ | |
879 | ref_file = git_path("%s", orig_ref); | |
5cc3cef9 JH |
880 | if (remove_empty_directories(ref_file)) { |
881 | last_errno = errno; | |
882 | error("there are still refs under '%s'", orig_ref); | |
883 | goto error_return; | |
884 | } | |
68db31cc | 885 | ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, &type); |
bc7127ef | 886 | } |
68db31cc SV |
887 | if (type_p) |
888 | *type_p = type; | |
ed378ec7 | 889 | if (!ref) { |
5cc3cef9 | 890 | last_errno = errno; |
818f477c | 891 | error("unable to resolve reference %s: %s", |
ed378ec7 | 892 | orig_ref, strerror(errno)); |
5cc3cef9 | 893 | goto error_return; |
4bd18c43 | 894 | } |
5bdd8d4a | 895 | missing = is_null_sha1(lock->old_sha1); |
c976d415 LH |
896 | /* When the ref did not exist and we are creating it, |
897 | * make sure there is no existing ref that is packed | |
898 | * whose name begins with our refname, nor a ref whose | |
899 | * name is a proper prefix of our refname. | |
900 | */ | |
5bdd8d4a | 901 | if (missing && |
f475e08e JK |
902 | !is_refname_available(ref, NULL, get_packed_refs(), 0)) { |
903 | last_errno = ENOTDIR; | |
c976d415 | 904 | goto error_return; |
f475e08e | 905 | } |
22a3844e | 906 | |
c33d5174 | 907 | lock->lk = xcalloc(1, sizeof(struct lock_file)); |
4bd18c43 | 908 | |
acd3b9ec JH |
909 | lflags = LOCK_DIE_ON_ERROR; |
910 | if (flags & REF_NODEREF) { | |
68db31cc | 911 | ref = orig_ref; |
acd3b9ec JH |
912 | lflags |= LOCK_NODEREF; |
913 | } | |
434cd0cd | 914 | lock->ref_name = xstrdup(ref); |
1655707c | 915 | lock->orig_ref_name = xstrdup(orig_ref); |
7c1a278d | 916 | ref_file = git_path("%s", ref); |
5bdd8d4a | 917 | if (missing) |
68db31cc SV |
918 | lock->force_write = 1; |
919 | if ((flags & REF_NODEREF) && (type & REF_ISSYMREF)) | |
920 | lock->force_write = 1; | |
4bd18c43 | 921 | |
5cc3cef9 JH |
922 | if (safe_create_leading_directories(ref_file)) { |
923 | last_errno = errno; | |
924 | error("unable to create directory for %s", ref_file); | |
925 | goto error_return; | |
926 | } | |
4bd18c43 | 927 | |
acd3b9ec | 928 | lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags); |
4bd18c43 | 929 | return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock; |
5cc3cef9 JH |
930 | |
931 | error_return: | |
932 | unlock_ref(lock); | |
933 | errno = last_errno; | |
934 | return NULL; | |
4bd18c43 SP |
935 | } |
936 | ||
4431fcc4 | 937 | struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1) |
95fc7512 | 938 | { |
53cce84c | 939 | char refpath[PATH_MAX]; |
95fc7512 | 940 | if (check_ref_format(ref)) |
4bd18c43 | 941 | return NULL; |
53cce84c | 942 | strcpy(refpath, mkpath("refs/%s", ref)); |
68db31cc | 943 | return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL); |
4bd18c43 SP |
944 | } |
945 | ||
68db31cc | 946 | struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags) |
4bd18c43 | 947 | { |
5f7b202a | 948 | switch (check_ref_format(ref)) { |
5f7b202a | 949 | default: |
257f3020 JH |
950 | return NULL; |
951 | case 0: | |
952 | case CHECK_REF_FORMAT_ONELEVEL: | |
5f7b202a JH |
953 | return lock_ref_sha1_basic(ref, old_sha1, flags, NULL); |
954 | } | |
c0277d15 JH |
955 | } |
956 | ||
26a063a1 JH |
957 | static struct lock_file packlock; |
958 | ||
c0277d15 JH |
959 | static int repack_without_ref(const char *refname) |
960 | { | |
961 | struct ref_list *list, *packed_ref_list; | |
962 | int fd; | |
963 | int found = 0; | |
c0277d15 JH |
964 | |
965 | packed_ref_list = get_packed_refs(); | |
966 | for (list = packed_ref_list; list; list = list->next) { | |
967 | if (!strcmp(refname, list->name)) { | |
968 | found = 1; | |
969 | break; | |
970 | } | |
971 | } | |
972 | if (!found) | |
973 | return 0; | |
c0277d15 | 974 | fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0); |
1b018fd9 MV |
975 | if (fd < 0) { |
976 | unable_to_lock_error(git_path("packed-refs"), errno); | |
c0277d15 | 977 | return error("cannot delete '%s' from packed refs", refname); |
1b018fd9 | 978 | } |
c0277d15 JH |
979 | |
980 | for (list = packed_ref_list; list; list = list->next) { | |
981 | char line[PATH_MAX + 100]; | |
982 | int len; | |
983 | ||
984 | if (!strcmp(refname, list->name)) | |
985 | continue; | |
986 | len = snprintf(line, sizeof(line), "%s %s\n", | |
987 | sha1_to_hex(list->sha1), list->name); | |
988 | /* this should not happen but just being defensive */ | |
989 | if (len > sizeof(line)) | |
990 | die("too long a refname '%s'", list->name); | |
991 | write_or_die(fd, line, len); | |
992 | } | |
993 | return commit_lock_file(&packlock); | |
994 | } | |
995 | ||
eca35a25 | 996 | int delete_ref(const char *refname, const unsigned char *sha1, int delopt) |
c0277d15 JH |
997 | { |
998 | struct ref_lock *lock; | |
eca35a25 | 999 | int err, i = 0, ret = 0, flag = 0; |
c0277d15 | 1000 | |
68db31cc | 1001 | lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); |
c0277d15 JH |
1002 | if (!lock) |
1003 | return 1; | |
045a476f | 1004 | if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { |
c0277d15 | 1005 | /* loose */ |
eca35a25 MV |
1006 | const char *path; |
1007 | ||
1008 | if (!(delopt & REF_NODEREF)) { | |
1009 | i = strlen(lock->lk->filename) - 5; /* .lock */ | |
1010 | lock->lk->filename[i] = 0; | |
1011 | path = lock->lk->filename; | |
1012 | } else { | |
9db56f71 | 1013 | path = git_path("%s", refname); |
eca35a25 | 1014 | } |
691f1a28 AR |
1015 | err = unlink_or_warn(path); |
1016 | if (err && errno != ENOENT) | |
c0277d15 | 1017 | ret = 1; |
691f1a28 | 1018 | |
eca35a25 MV |
1019 | if (!(delopt & REF_NODEREF)) |
1020 | lock->lk->filename[i] = '.'; | |
c0277d15 JH |
1021 | } |
1022 | /* removing the loose one could have resurrected an earlier | |
1023 | * packed one. Also, if it was not loose we need to repack | |
1024 | * without it. | |
1025 | */ | |
1026 | ret |= repack_without_ref(refname); | |
1027 | ||
691f1a28 | 1028 | unlink_or_warn(git_path("logs/%s", lock->ref_name)); |
c0277d15 JH |
1029 | invalidate_cached_refs(); |
1030 | unlock_ref(lock); | |
1031 | return ret; | |
4bd18c43 SP |
1032 | } |
1033 | ||
678d0f4c | 1034 | int rename_ref(const char *oldref, const char *newref, const char *logmsg) |
c976d415 LH |
1035 | { |
1036 | static const char renamed_ref[] = "RENAMED-REF"; | |
1037 | unsigned char sha1[20], orig_sha1[20]; | |
1038 | int flag = 0, logmoved = 0; | |
1039 | struct ref_lock *lock; | |
c976d415 | 1040 | struct stat loginfo; |
16c2bfbb | 1041 | int log = !lstat(git_path("logs/%s", oldref), &loginfo); |
eca35a25 | 1042 | const char *symref = NULL; |
c976d415 | 1043 | |
450d4c0f | 1044 | if (log && S_ISLNK(loginfo.st_mode)) |
c976d415 LH |
1045 | return error("reflog for %s is a symlink", oldref); |
1046 | ||
eca35a25 MV |
1047 | symref = resolve_ref(oldref, orig_sha1, 1, &flag); |
1048 | if (flag & REF_ISSYMREF) | |
fa58186c MV |
1049 | return error("refname %s is a symbolic ref, renaming it is not supported", |
1050 | oldref); | |
eca35a25 | 1051 | if (!symref) |
c976d415 LH |
1052 | return error("refname %s not found", oldref); |
1053 | ||
1054 | if (!is_refname_available(newref, oldref, get_packed_refs(), 0)) | |
1055 | return 1; | |
1056 | ||
1057 | if (!is_refname_available(newref, oldref, get_loose_refs(), 0)) | |
1058 | return 1; | |
1059 | ||
68db31cc | 1060 | lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL); |
c976d415 LH |
1061 | if (!lock) |
1062 | return error("unable to lock %s", renamed_ref); | |
1063 | lock->force_write = 1; | |
678d0f4c | 1064 | if (write_ref_sha1(lock, orig_sha1, logmsg)) |
c976d415 LH |
1065 | return error("unable to save current sha1 in %s", renamed_ref); |
1066 | ||
1067 | if (log && rename(git_path("logs/%s", oldref), git_path("tmp-renamed-log"))) | |
1068 | return error("unable to move logfile logs/%s to tmp-renamed-log: %s", | |
1069 | oldref, strerror(errno)); | |
1070 | ||
eca35a25 | 1071 | if (delete_ref(oldref, orig_sha1, REF_NODEREF)) { |
c976d415 LH |
1072 | error("unable to delete old %s", oldref); |
1073 | goto rollback; | |
1074 | } | |
1075 | ||
eca35a25 | 1076 | if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1, REF_NODEREF)) { |
c976d415 LH |
1077 | if (errno==EISDIR) { |
1078 | if (remove_empty_directories(git_path("%s", newref))) { | |
1079 | error("Directory not empty: %s", newref); | |
1080 | goto rollback; | |
1081 | } | |
1082 | } else { | |
1083 | error("unable to delete existing %s", newref); | |
1084 | goto rollback; | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | if (log && safe_create_leading_directories(git_path("logs/%s", newref))) { | |
1089 | error("unable to create directory for %s", newref); | |
1090 | goto rollback; | |
1091 | } | |
1092 | ||
1093 | retry: | |
1094 | if (log && rename(git_path("tmp-renamed-log"), git_path("logs/%s", newref))) { | |
d9e74d57 JR |
1095 | if (errno==EISDIR || errno==ENOTDIR) { |
1096 | /* | |
1097 | * rename(a, b) when b is an existing | |
1098 | * directory ought to result in ISDIR, but | |
1099 | * Solaris 5.8 gives ENOTDIR. Sheesh. | |
1100 | */ | |
c976d415 LH |
1101 | if (remove_empty_directories(git_path("logs/%s", newref))) { |
1102 | error("Directory not empty: logs/%s", newref); | |
1103 | goto rollback; | |
1104 | } | |
1105 | goto retry; | |
1106 | } else { | |
1107 | error("unable to move logfile tmp-renamed-log to logs/%s: %s", | |
1108 | newref, strerror(errno)); | |
1109 | goto rollback; | |
1110 | } | |
1111 | } | |
1112 | logmoved = log; | |
1113 | ||
68db31cc | 1114 | lock = lock_ref_sha1_basic(newref, NULL, 0, NULL); |
c976d415 LH |
1115 | if (!lock) { |
1116 | error("unable to lock %s for update", newref); | |
1117 | goto rollback; | |
1118 | } | |
c976d415 LH |
1119 | lock->force_write = 1; |
1120 | hashcpy(lock->old_sha1, orig_sha1); | |
678d0f4c | 1121 | if (write_ref_sha1(lock, orig_sha1, logmsg)) { |
c976d415 LH |
1122 | error("unable to write current sha1 into %s", newref); |
1123 | goto rollback; | |
1124 | } | |
1125 | ||
1126 | return 0; | |
1127 | ||
1128 | rollback: | |
68db31cc | 1129 | lock = lock_ref_sha1_basic(oldref, NULL, 0, NULL); |
c976d415 LH |
1130 | if (!lock) { |
1131 | error("unable to lock %s for rollback", oldref); | |
1132 | goto rollbacklog; | |
1133 | } | |
1134 | ||
1135 | lock->force_write = 1; | |
1136 | flag = log_all_ref_updates; | |
1137 | log_all_ref_updates = 0; | |
1138 | if (write_ref_sha1(lock, orig_sha1, NULL)) | |
1139 | error("unable to write current sha1 into %s", oldref); | |
1140 | log_all_ref_updates = flag; | |
1141 | ||
1142 | rollbacklog: | |
1143 | if (logmoved && rename(git_path("logs/%s", newref), git_path("logs/%s", oldref))) | |
1144 | error("unable to restore logfile %s from %s: %s", | |
1145 | oldref, newref, strerror(errno)); | |
1146 | if (!logmoved && log && | |
1147 | rename(git_path("tmp-renamed-log"), git_path("logs/%s", oldref))) | |
1148 | error("unable to restore logfile %s from tmp-renamed-log: %s", | |
1149 | oldref, strerror(errno)); | |
1150 | ||
1151 | return 1; | |
1152 | } | |
1153 | ||
435fc852 | 1154 | int close_ref(struct ref_lock *lock) |
b531394d BC |
1155 | { |
1156 | if (close_lock_file(lock->lk)) | |
1157 | return -1; | |
1158 | lock->lock_fd = -1; | |
1159 | return 0; | |
1160 | } | |
1161 | ||
435fc852 | 1162 | int commit_ref(struct ref_lock *lock) |
b531394d BC |
1163 | { |
1164 | if (commit_lock_file(lock->lk)) | |
1165 | return -1; | |
1166 | lock->lock_fd = -1; | |
1167 | return 0; | |
1168 | } | |
1169 | ||
e5f38ec3 | 1170 | void unlock_ref(struct ref_lock *lock) |
4bd18c43 | 1171 | { |
4ed7cd3a BC |
1172 | /* Do not free lock->lk -- atexit() still looks at them */ |
1173 | if (lock->lk) | |
1174 | rollback_lock_file(lock->lk); | |
434cd0cd | 1175 | free(lock->ref_name); |
1655707c | 1176 | free(lock->orig_ref_name); |
4bd18c43 SP |
1177 | free(lock); |
1178 | } | |
1179 | ||
0ec29a47 JH |
1180 | /* |
1181 | * copy the reflog message msg to buf, which has been allocated sufficiently | |
1182 | * large, while cleaning up the whitespaces. Especially, convert LF to space, | |
1183 | * because reflog file is one line per entry. | |
1184 | */ | |
1185 | static int copy_msg(char *buf, const char *msg) | |
1186 | { | |
1187 | char *cp = buf; | |
1188 | char c; | |
1189 | int wasspace = 1; | |
1190 | ||
1191 | *cp++ = '\t'; | |
1192 | while ((c = *msg++)) { | |
1193 | if (wasspace && isspace(c)) | |
1194 | continue; | |
1195 | wasspace = isspace(c); | |
1196 | if (wasspace) | |
1197 | c = ' '; | |
1198 | *cp++ = c; | |
1199 | } | |
1200 | while (buf < cp && isspace(cp[-1])) | |
1201 | cp--; | |
1202 | *cp++ = '\n'; | |
1203 | return cp - buf; | |
1204 | } | |
1205 | ||
9a13f0b7 NP |
1206 | static int log_ref_write(const char *ref_name, const unsigned char *old_sha1, |
1207 | const unsigned char *new_sha1, const char *msg) | |
6de08ae6 SP |
1208 | { |
1209 | int logfd, written, oflags = O_APPEND | O_WRONLY; | |
1210 | unsigned maxlen, len; | |
8ac65937 | 1211 | int msglen; |
958a4789 AR |
1212 | char log_file[PATH_MAX]; |
1213 | char *logrec; | |
ff4c8485 | 1214 | const char *committer; |
6de08ae6 | 1215 | |
510c5a8e | 1216 | if (log_all_ref_updates < 0) |
7d1864ce | 1217 | log_all_ref_updates = !is_bare_repository(); |
510c5a8e | 1218 | |
958a4789 | 1219 | git_snpath(log_file, sizeof(log_file), "logs/%s", ref_name); |
9a13f0b7 | 1220 | |
4057deb5 | 1221 | if (log_all_ref_updates && |
cc44c765 JH |
1222 | (!prefixcmp(ref_name, "refs/heads/") || |
1223 | !prefixcmp(ref_name, "refs/remotes/") || | |
bd104db1 | 1224 | !strcmp(ref_name, "HEAD"))) { |
9a13f0b7 | 1225 | if (safe_create_leading_directories(log_file) < 0) |
6de08ae6 | 1226 | return error("unable to create directory for %s", |
9a13f0b7 | 1227 | log_file); |
6de08ae6 SP |
1228 | oflags |= O_CREAT; |
1229 | } | |
1230 | ||
9a13f0b7 | 1231 | logfd = open(log_file, oflags, 0666); |
6de08ae6 | 1232 | if (logfd < 0) { |
1974bf62 | 1233 | if (!(oflags & O_CREAT) && errno == ENOENT) |
6de08ae6 | 1234 | return 0; |
3b463c3f JH |
1235 | |
1236 | if ((oflags & O_CREAT) && errno == EISDIR) { | |
9a13f0b7 | 1237 | if (remove_empty_directories(log_file)) { |
3b463c3f | 1238 | return error("There are still logs under '%s'", |
9a13f0b7 | 1239 | log_file); |
3b463c3f | 1240 | } |
9a13f0b7 | 1241 | logfd = open(log_file, oflags, 0666); |
3b463c3f JH |
1242 | } |
1243 | ||
1244 | if (logfd < 0) | |
1245 | return error("Unable to append to %s: %s", | |
9a13f0b7 | 1246 | log_file, strerror(errno)); |
6de08ae6 SP |
1247 | } |
1248 | ||
443b92b6 MK |
1249 | adjust_shared_perm(log_file); |
1250 | ||
0ec29a47 | 1251 | msglen = msg ? strlen(msg) : 0; |
774751a8 | 1252 | committer = git_committer_info(0); |
8ac65937 JH |
1253 | maxlen = strlen(committer) + msglen + 100; |
1254 | logrec = xmalloc(maxlen); | |
1255 | len = sprintf(logrec, "%s %s %s\n", | |
9a13f0b7 NP |
1256 | sha1_to_hex(old_sha1), |
1257 | sha1_to_hex(new_sha1), | |
8ac65937 JH |
1258 | committer); |
1259 | if (msglen) | |
0ec29a47 | 1260 | len += copy_msg(logrec + len - 1, msg) - 1; |
93822c22 | 1261 | written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1; |
6de08ae6 | 1262 | free(logrec); |
91c8d590 | 1263 | if (close(logfd) != 0 || written != len) |
9a13f0b7 | 1264 | return error("Unable to append to %s", log_file); |
6de08ae6 SP |
1265 | return 0; |
1266 | } | |
1267 | ||
c3b0dec5 LT |
1268 | static int is_branch(const char *refname) |
1269 | { | |
1270 | return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"); | |
1271 | } | |
1272 | ||
4bd18c43 SP |
1273 | int write_ref_sha1(struct ref_lock *lock, |
1274 | const unsigned char *sha1, const char *logmsg) | |
1275 | { | |
1276 | static char term = '\n'; | |
c3b0dec5 | 1277 | struct object *o; |
4bd18c43 SP |
1278 | |
1279 | if (!lock) | |
95fc7512 | 1280 | return -1; |
a89fccd2 | 1281 | if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) { |
4bd18c43 SP |
1282 | unlock_ref(lock); |
1283 | return 0; | |
95fc7512 | 1284 | } |
c3b0dec5 LT |
1285 | o = parse_object(sha1); |
1286 | if (!o) { | |
1287 | error("Trying to write ref %s with nonexistant object %s", | |
1288 | lock->ref_name, sha1_to_hex(sha1)); | |
1289 | unlock_ref(lock); | |
1290 | return -1; | |
1291 | } | |
1292 | if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) { | |
1293 | error("Trying to write non-commit object %s to branch %s", | |
1294 | sha1_to_hex(sha1), lock->ref_name); | |
1295 | unlock_ref(lock); | |
1296 | return -1; | |
1297 | } | |
93822c22 AW |
1298 | if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 || |
1299 | write_in_full(lock->lock_fd, &term, 1) != 1 | |
b531394d | 1300 | || close_ref(lock) < 0) { |
c33d5174 | 1301 | error("Couldn't write %s", lock->lk->filename); |
4bd18c43 SP |
1302 | unlock_ref(lock); |
1303 | return -1; | |
1304 | } | |
5e290ff7 | 1305 | invalidate_cached_refs(); |
bd104db1 NP |
1306 | if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 || |
1307 | (strcmp(lock->ref_name, lock->orig_ref_name) && | |
1308 | log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) { | |
6de08ae6 SP |
1309 | unlock_ref(lock); |
1310 | return -1; | |
1311 | } | |
605fac8b NP |
1312 | if (strcmp(lock->orig_ref_name, "HEAD") != 0) { |
1313 | /* | |
1314 | * Special hack: If a branch is updated directly and HEAD | |
1315 | * points to it (may happen on the remote side of a push | |
1316 | * for example) then logically the HEAD reflog should be | |
1317 | * updated too. | |
1318 | * A generic solution implies reverse symref information, | |
1319 | * but finding all symrefs pointing to the given branch | |
1320 | * would be rather costly for this rare event (the direct | |
1321 | * update of a branch) to be worth it. So let's cheat and | |
1322 | * check with HEAD only which should cover 99% of all usage | |
1323 | * scenarios (even 100% of the default ones). | |
1324 | */ | |
1325 | unsigned char head_sha1[20]; | |
1326 | int head_flag; | |
1327 | const char *head_ref; | |
1328 | head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag); | |
1329 | if (head_ref && (head_flag & REF_ISSYMREF) && | |
1330 | !strcmp(head_ref, lock->ref_name)) | |
1331 | log_ref_write("HEAD", lock->old_sha1, sha1, logmsg); | |
1332 | } | |
b531394d | 1333 | if (commit_ref(lock)) { |
434cd0cd | 1334 | error("Couldn't set %s", lock->ref_name); |
4bd18c43 SP |
1335 | unlock_ref(lock); |
1336 | return -1; | |
1337 | } | |
4bd18c43 SP |
1338 | unlock_ref(lock); |
1339 | return 0; | |
95fc7512 | 1340 | } |
d556fae2 | 1341 | |
8b5157e4 NP |
1342 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1343 | const char *logmsg) | |
41b625b0 NP |
1344 | { |
1345 | const char *lockpath; | |
1346 | char ref[1000]; | |
1347 | int fd, len, written; | |
a4f34cbb | 1348 | char *git_HEAD = git_pathdup("%s", ref_target); |
8b5157e4 NP |
1349 | unsigned char old_sha1[20], new_sha1[20]; |
1350 | ||
1351 | if (logmsg && read_ref(ref_target, old_sha1)) | |
1352 | hashclr(old_sha1); | |
41b625b0 | 1353 | |
d48744d1 JH |
1354 | if (safe_create_leading_directories(git_HEAD) < 0) |
1355 | return error("unable to create directory for %s", git_HEAD); | |
1356 | ||
41b625b0 NP |
1357 | #ifndef NO_SYMLINK_HEAD |
1358 | if (prefer_symlink_refs) { | |
1359 | unlink(git_HEAD); | |
1360 | if (!symlink(refs_heads_master, git_HEAD)) | |
8b5157e4 | 1361 | goto done; |
41b625b0 NP |
1362 | fprintf(stderr, "no symlink - falling back to symbolic ref\n"); |
1363 | } | |
1364 | #endif | |
1365 | ||
1366 | len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master); | |
1367 | if (sizeof(ref) <= len) { | |
1368 | error("refname too long: %s", refs_heads_master); | |
47fc52e2 | 1369 | goto error_free_return; |
41b625b0 NP |
1370 | } |
1371 | lockpath = mkpath("%s.lock", git_HEAD); | |
1372 | fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1373 | if (fd < 0) { | |
1374 | error("Unable to open %s for writing", lockpath); | |
47fc52e2 | 1375 | goto error_free_return; |
41b625b0 NP |
1376 | } |
1377 | written = write_in_full(fd, ref, len); | |
91c8d590 | 1378 | if (close(fd) != 0 || written != len) { |
41b625b0 | 1379 | error("Unable to write to %s", lockpath); |
47fc52e2 | 1380 | goto error_unlink_return; |
41b625b0 NP |
1381 | } |
1382 | if (rename(lockpath, git_HEAD) < 0) { | |
41b625b0 | 1383 | error("Unable to create %s", git_HEAD); |
47fc52e2 | 1384 | goto error_unlink_return; |
41b625b0 NP |
1385 | } |
1386 | if (adjust_shared_perm(git_HEAD)) { | |
41b625b0 | 1387 | error("Unable to fix permissions on %s", lockpath); |
47fc52e2 | 1388 | error_unlink_return: |
691f1a28 | 1389 | unlink_or_warn(lockpath); |
47fc52e2 JH |
1390 | error_free_return: |
1391 | free(git_HEAD); | |
1392 | return -1; | |
41b625b0 | 1393 | } |
8b5157e4 | 1394 | |
ee96d11b | 1395 | #ifndef NO_SYMLINK_HEAD |
8b5157e4 | 1396 | done: |
ee96d11b | 1397 | #endif |
8b5157e4 NP |
1398 | if (logmsg && !read_ref(refs_heads_master, new_sha1)) |
1399 | log_ref_write(ref_target, old_sha1, new_sha1, logmsg); | |
1400 | ||
47fc52e2 | 1401 | free(git_HEAD); |
41b625b0 NP |
1402 | return 0; |
1403 | } | |
1404 | ||
16d7cc90 JH |
1405 | static char *ref_msg(const char *line, const char *endp) |
1406 | { | |
1407 | const char *ep; | |
16d7cc90 | 1408 | line += 82; |
182af834 PH |
1409 | ep = memchr(line, '\n', endp - line); |
1410 | if (!ep) | |
1411 | ep = endp; | |
1412 | return xmemdupz(line, ep - line); | |
16d7cc90 JH |
1413 | } |
1414 | ||
1415 | int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *sha1, char **msg, unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
d556fae2 | 1416 | { |
e5229042 | 1417 | const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec; |
d556fae2 | 1418 | char *tz_c; |
e29cb53a | 1419 | int logfd, tz, reccnt = 0; |
d556fae2 SP |
1420 | struct stat st; |
1421 | unsigned long date; | |
e5229042 | 1422 | unsigned char logged_sha1[20]; |
cb48cb58 | 1423 | void *log_mapped; |
dc49cd76 | 1424 | size_t mapsz; |
d556fae2 SP |
1425 | |
1426 | logfile = git_path("logs/%s", ref); | |
1427 | logfd = open(logfile, O_RDONLY, 0); | |
1428 | if (logfd < 0) | |
d824cbba | 1429 | die_errno("Unable to read log '%s'", logfile); |
d556fae2 SP |
1430 | fstat(logfd, &st); |
1431 | if (!st.st_size) | |
1432 | die("Log %s is empty.", logfile); | |
dc49cd76 SP |
1433 | mapsz = xsize_t(st.st_size); |
1434 | log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0); | |
cb48cb58 | 1435 | logdata = log_mapped; |
d556fae2 SP |
1436 | close(logfd); |
1437 | ||
e5229042 | 1438 | lastrec = NULL; |
d556fae2 SP |
1439 | rec = logend = logdata + st.st_size; |
1440 | while (logdata < rec) { | |
e29cb53a | 1441 | reccnt++; |
d556fae2 SP |
1442 | if (logdata < rec && *(rec-1) == '\n') |
1443 | rec--; | |
e5229042 SP |
1444 | lastgt = NULL; |
1445 | while (logdata < rec && *(rec-1) != '\n') { | |
d556fae2 | 1446 | rec--; |
e5229042 SP |
1447 | if (*rec == '>') |
1448 | lastgt = rec; | |
1449 | } | |
1450 | if (!lastgt) | |
d556fae2 | 1451 | die("Log %s is corrupt.", logfile); |
e5229042 | 1452 | date = strtoul(lastgt + 1, &tz_c, 10); |
ab2a1a32 | 1453 | if (date <= at_time || cnt == 0) { |
76a44c5c | 1454 | tz = strtoul(tz_c, NULL, 10); |
16d7cc90 JH |
1455 | if (msg) |
1456 | *msg = ref_msg(rec, logend); | |
1457 | if (cutoff_time) | |
1458 | *cutoff_time = date; | |
1459 | if (cutoff_tz) | |
1460 | *cutoff_tz = tz; | |
1461 | if (cutoff_cnt) | |
76a44c5c | 1462 | *cutoff_cnt = reccnt - 1; |
e5229042 SP |
1463 | if (lastrec) { |
1464 | if (get_sha1_hex(lastrec, logged_sha1)) | |
1465 | die("Log %s is corrupt.", logfile); | |
1466 | if (get_sha1_hex(rec + 41, sha1)) | |
1467 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1468 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1469 | warning("Log %s has gap after %s.", |
73013afd | 1470 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 | 1471 | } |
e5f38ec3 JH |
1472 | } |
1473 | else if (date == at_time) { | |
e5229042 SP |
1474 | if (get_sha1_hex(rec + 41, sha1)) |
1475 | die("Log %s is corrupt.", logfile); | |
e5f38ec3 JH |
1476 | } |
1477 | else { | |
e5229042 SP |
1478 | if (get_sha1_hex(rec + 41, logged_sha1)) |
1479 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1480 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1481 | warning("Log %s unexpectedly ended on %s.", |
73013afd | 1482 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 SP |
1483 | } |
1484 | } | |
dc49cd76 | 1485 | munmap(log_mapped, mapsz); |
d556fae2 SP |
1486 | return 0; |
1487 | } | |
e5229042 | 1488 | lastrec = rec; |
ab2a1a32 JH |
1489 | if (cnt > 0) |
1490 | cnt--; | |
d556fae2 SP |
1491 | } |
1492 | ||
e5229042 SP |
1493 | rec = logdata; |
1494 | while (rec < logend && *rec != '>' && *rec != '\n') | |
1495 | rec++; | |
1496 | if (rec == logend || *rec == '\n') | |
d556fae2 | 1497 | die("Log %s is corrupt.", logfile); |
e5229042 | 1498 | date = strtoul(rec + 1, &tz_c, 10); |
d556fae2 SP |
1499 | tz = strtoul(tz_c, NULL, 10); |
1500 | if (get_sha1_hex(logdata, sha1)) | |
1501 | die("Log %s is corrupt.", logfile); | |
d1a4489a JK |
1502 | if (is_null_sha1(sha1)) { |
1503 | if (get_sha1_hex(logdata + 41, sha1)) | |
1504 | die("Log %s is corrupt.", logfile); | |
1505 | } | |
16d7cc90 JH |
1506 | if (msg) |
1507 | *msg = ref_msg(logdata, logend); | |
dc49cd76 | 1508 | munmap(log_mapped, mapsz); |
16d7cc90 JH |
1509 | |
1510 | if (cutoff_time) | |
1511 | *cutoff_time = date; | |
1512 | if (cutoff_tz) | |
1513 | *cutoff_tz = tz; | |
1514 | if (cutoff_cnt) | |
1515 | *cutoff_cnt = reccnt; | |
1516 | return 1; | |
d556fae2 | 1517 | } |
2ff81662 | 1518 | |
101d15e0 | 1519 | int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, void *cb_data) |
2ff81662 JH |
1520 | { |
1521 | const char *logfile; | |
1522 | FILE *logfp; | |
1523 | char buf[1024]; | |
2266bf27 | 1524 | int ret = 0; |
2ff81662 JH |
1525 | |
1526 | logfile = git_path("logs/%s", ref); | |
1527 | logfp = fopen(logfile, "r"); | |
1528 | if (!logfp) | |
883d60fa | 1529 | return -1; |
101d15e0 JH |
1530 | |
1531 | if (ofs) { | |
1532 | struct stat statbuf; | |
1533 | if (fstat(fileno(logfp), &statbuf) || | |
1534 | statbuf.st_size < ofs || | |
1535 | fseek(logfp, -ofs, SEEK_END) || | |
9d33f7c2 BC |
1536 | fgets(buf, sizeof(buf), logfp)) { |
1537 | fclose(logfp); | |
101d15e0 | 1538 | return -1; |
9d33f7c2 | 1539 | } |
101d15e0 JH |
1540 | } |
1541 | ||
2ff81662 JH |
1542 | while (fgets(buf, sizeof(buf), logfp)) { |
1543 | unsigned char osha1[20], nsha1[20]; | |
883d60fa JS |
1544 | char *email_end, *message; |
1545 | unsigned long timestamp; | |
2266bf27 | 1546 | int len, tz; |
2ff81662 JH |
1547 | |
1548 | /* old SP new SP name <email> SP time TAB msg LF */ | |
1549 | len = strlen(buf); | |
1550 | if (len < 83 || buf[len-1] != '\n' || | |
1551 | get_sha1_hex(buf, osha1) || buf[40] != ' ' || | |
883d60fa JS |
1552 | get_sha1_hex(buf + 41, nsha1) || buf[81] != ' ' || |
1553 | !(email_end = strchr(buf + 82, '>')) || | |
1554 | email_end[1] != ' ' || | |
1555 | !(timestamp = strtoul(email_end + 2, &message, 10)) || | |
1556 | !message || message[0] != ' ' || | |
1557 | (message[1] != '+' && message[1] != '-') || | |
1558 | !isdigit(message[2]) || !isdigit(message[3]) || | |
b4dd4856 | 1559 | !isdigit(message[4]) || !isdigit(message[5])) |
2ff81662 | 1560 | continue; /* corrupt? */ |
883d60fa JS |
1561 | email_end[1] = '\0'; |
1562 | tz = strtol(message + 1, NULL, 10); | |
b4dd4856 JS |
1563 | if (message[6] != '\t') |
1564 | message += 6; | |
1565 | else | |
1566 | message += 7; | |
883d60fa JS |
1567 | ret = fn(osha1, nsha1, buf+82, timestamp, tz, message, cb_data); |
1568 | if (ret) | |
2266bf27 | 1569 | break; |
2ff81662 JH |
1570 | } |
1571 | fclose(logfp); | |
2266bf27 | 1572 | return ret; |
2ff81662 | 1573 | } |
e29cb53a | 1574 | |
101d15e0 JH |
1575 | int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data) |
1576 | { | |
1577 | return for_each_recent_reflog_ent(ref, fn, 0, cb_data); | |
1578 | } | |
1579 | ||
eb8381c8 NP |
1580 | static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data) |
1581 | { | |
1582 | DIR *dir = opendir(git_path("logs/%s", base)); | |
fcee5a14 | 1583 | int retval = 0; |
eb8381c8 NP |
1584 | |
1585 | if (dir) { | |
1586 | struct dirent *de; | |
1587 | int baselen = strlen(base); | |
1588 | char *log = xmalloc(baselen + 257); | |
1589 | ||
1590 | memcpy(log, base, baselen); | |
1591 | if (baselen && base[baselen-1] != '/') | |
1592 | log[baselen++] = '/'; | |
1593 | ||
1594 | while ((de = readdir(dir)) != NULL) { | |
1595 | struct stat st; | |
1596 | int namelen; | |
1597 | ||
1598 | if (de->d_name[0] == '.') | |
1599 | continue; | |
1600 | namelen = strlen(de->d_name); | |
1601 | if (namelen > 255) | |
1602 | continue; | |
1603 | if (has_extension(de->d_name, ".lock")) | |
1604 | continue; | |
1605 | memcpy(log + baselen, de->d_name, namelen+1); | |
1606 | if (stat(git_path("logs/%s", log), &st) < 0) | |
1607 | continue; | |
1608 | if (S_ISDIR(st.st_mode)) { | |
1609 | retval = do_for_each_reflog(log, fn, cb_data); | |
1610 | } else { | |
1611 | unsigned char sha1[20]; | |
1612 | if (!resolve_ref(log, sha1, 0, NULL)) | |
1613 | retval = error("bad ref for %s", log); | |
1614 | else | |
1615 | retval = fn(log, sha1, 0, cb_data); | |
1616 | } | |
1617 | if (retval) | |
1618 | break; | |
1619 | } | |
1620 | free(log); | |
1621 | closedir(dir); | |
1622 | } | |
acb39f64 | 1623 | else if (*base) |
fcee5a14 | 1624 | return errno; |
eb8381c8 NP |
1625 | return retval; |
1626 | } | |
1627 | ||
1628 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
1629 | { | |
1630 | return do_for_each_reflog("", fn, cb_data); | |
1631 | } | |
3d9f037c CR |
1632 | |
1633 | int update_ref(const char *action, const char *refname, | |
1634 | const unsigned char *sha1, const unsigned char *oldval, | |
1635 | int flags, enum action_on_err onerr) | |
1636 | { | |
1637 | static struct ref_lock *lock; | |
1638 | lock = lock_any_ref_for_update(refname, oldval, flags); | |
1639 | if (!lock) { | |
1640 | const char *str = "Cannot lock the ref '%s'."; | |
1641 | switch (onerr) { | |
1642 | case MSG_ON_ERR: error(str, refname); break; | |
1643 | case DIE_ON_ERR: die(str, refname); break; | |
1644 | case QUIET_ON_ERR: break; | |
1645 | } | |
1646 | return 1; | |
1647 | } | |
1648 | if (write_ref_sha1(lock, sha1, action) < 0) { | |
1649 | const char *str = "Cannot update the ref '%s'."; | |
1650 | switch (onerr) { | |
1651 | case MSG_ON_ERR: error(str, refname); break; | |
1652 | case DIE_ON_ERR: die(str, refname); break; | |
1653 | case QUIET_ON_ERR: break; | |
1654 | } | |
1655 | return 1; | |
1656 | } | |
1657 | return 0; | |
1658 | } | |
cda69f48 | 1659 | |
5483f799 | 1660 | struct ref *find_ref_by_name(const struct ref *list, const char *name) |
cda69f48 JK |
1661 | { |
1662 | for ( ; list; list = list->next) | |
1663 | if (!strcmp(list->name, name)) | |
5483f799 | 1664 | return (struct ref *)list; |
cda69f48 JK |
1665 | return NULL; |
1666 | } | |
7c2b3029 JK |
1667 | |
1668 | /* | |
1669 | * generate a format suitable for scanf from a ref_rev_parse_rules | |
1670 | * rule, that is replace the "%.*s" spec with a "%s" spec | |
1671 | */ | |
1672 | static void gen_scanf_fmt(char *scanf_fmt, const char *rule) | |
1673 | { | |
1674 | char *spec; | |
1675 | ||
1676 | spec = strstr(rule, "%.*s"); | |
1677 | if (!spec || strstr(spec + 4, "%.*s")) | |
1678 | die("invalid rule in ref_rev_parse_rules: %s", rule); | |
1679 | ||
1680 | /* copy all until spec */ | |
1681 | strncpy(scanf_fmt, rule, spec - rule); | |
1682 | scanf_fmt[spec - rule] = '\0'; | |
1683 | /* copy new spec */ | |
1684 | strcat(scanf_fmt, "%s"); | |
1685 | /* copy remaining rule */ | |
1686 | strcat(scanf_fmt, spec + 4); | |
1687 | ||
1688 | return; | |
1689 | } | |
1690 | ||
6e7b3309 | 1691 | char *shorten_unambiguous_ref(const char *ref, int strict) |
7c2b3029 JK |
1692 | { |
1693 | int i; | |
1694 | static char **scanf_fmts; | |
1695 | static int nr_rules; | |
1696 | char *short_name; | |
1697 | ||
1698 | /* pre generate scanf formats from ref_rev_parse_rules[] */ | |
1699 | if (!nr_rules) { | |
1700 | size_t total_len = 0; | |
1701 | ||
1702 | /* the rule list is NULL terminated, count them first */ | |
1703 | for (; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
1704 | /* no +1 because strlen("%s") < strlen("%.*s") */ | |
1705 | total_len += strlen(ref_rev_parse_rules[nr_rules]); | |
1706 | ||
1707 | scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); | |
1708 | ||
1709 | total_len = 0; | |
1710 | for (i = 0; i < nr_rules; i++) { | |
1711 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] | |
1712 | + total_len; | |
1713 | gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); | |
1714 | total_len += strlen(ref_rev_parse_rules[i]); | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | /* bail out if there are no rules */ | |
1719 | if (!nr_rules) | |
1720 | return xstrdup(ref); | |
1721 | ||
1722 | /* buffer for scanf result, at most ref must fit */ | |
1723 | short_name = xstrdup(ref); | |
1724 | ||
1725 | /* skip first rule, it will always match */ | |
1726 | for (i = nr_rules - 1; i > 0 ; --i) { | |
1727 | int j; | |
6e7b3309 | 1728 | int rules_to_fail = i; |
7c2b3029 JK |
1729 | int short_name_len; |
1730 | ||
1731 | if (1 != sscanf(ref, scanf_fmts[i], short_name)) | |
1732 | continue; | |
1733 | ||
1734 | short_name_len = strlen(short_name); | |
1735 | ||
6e7b3309 BW |
1736 | /* |
1737 | * in strict mode, all (except the matched one) rules | |
1738 | * must fail to resolve to a valid non-ambiguous ref | |
1739 | */ | |
1740 | if (strict) | |
1741 | rules_to_fail = nr_rules; | |
1742 | ||
7c2b3029 JK |
1743 | /* |
1744 | * check if the short name resolves to a valid ref, | |
1745 | * but use only rules prior to the matched one | |
1746 | */ | |
6e7b3309 | 1747 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 JK |
1748 | const char *rule = ref_rev_parse_rules[j]; |
1749 | unsigned char short_objectname[20]; | |
1750 | char refname[PATH_MAX]; | |
1751 | ||
6e7b3309 BW |
1752 | /* skip matched rule */ |
1753 | if (i == j) | |
1754 | continue; | |
1755 | ||
7c2b3029 JK |
1756 | /* |
1757 | * the short name is ambiguous, if it resolves | |
1758 | * (with this previous rule) to a valid ref | |
1759 | * read_ref() returns 0 on success | |
1760 | */ | |
1761 | mksnpath(refname, sizeof(refname), | |
1762 | rule, short_name_len, short_name); | |
1763 | if (!read_ref(refname, short_objectname)) | |
1764 | break; | |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | * short name is non-ambiguous if all previous rules | |
1769 | * haven't resolved to a valid ref | |
1770 | */ | |
6e7b3309 | 1771 | if (j == rules_to_fail) |
7c2b3029 JK |
1772 | return short_name; |
1773 | } | |
1774 | ||
1775 | free(short_name); | |
1776 | return xstrdup(ref); | |
1777 | } |