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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 | 288 | struct warn_if_dangling_data { |
3cf6134a | 289 | FILE *fp; |
f8948e2f JH |
290 | const char *refname; |
291 | const char *msg_fmt; | |
292 | }; | |
293 | ||
294 | static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1, | |
295 | int flags, void *cb_data) | |
296 | { | |
297 | struct warn_if_dangling_data *d = cb_data; | |
298 | const char *resolves_to; | |
299 | unsigned char junk[20]; | |
300 | ||
301 | if (!(flags & REF_ISSYMREF)) | |
302 | return 0; | |
303 | ||
304 | resolves_to = resolve_ref(refname, junk, 0, NULL); | |
305 | if (!resolves_to || strcmp(resolves_to, d->refname)) | |
306 | return 0; | |
307 | ||
3cf6134a | 308 | fprintf(d->fp, d->msg_fmt, refname); |
f8948e2f JH |
309 | return 0; |
310 | } | |
311 | ||
3cf6134a | 312 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f8948e2f | 313 | { |
3cf6134a | 314 | struct warn_if_dangling_data data = { fp, refname, msg_fmt }; |
f8948e2f JH |
315 | for_each_rawref(warn_if_dangling_symref, &data); |
316 | } | |
317 | ||
e1e22e37 LT |
318 | static struct ref_list *get_loose_refs(void) |
319 | { | |
5e290ff7 JH |
320 | if (!cached_refs.did_loose) { |
321 | cached_refs.loose = get_ref_dir("refs", NULL); | |
322 | cached_refs.did_loose = 1; | |
e1e22e37 | 323 | } |
5e290ff7 | 324 | return cached_refs.loose; |
e1e22e37 LT |
325 | } |
326 | ||
ca8db142 LT |
327 | /* We allow "recursive" symbolic refs. Only within reason, though */ |
328 | #define MAXDEPTH 5 | |
0ebde32c LT |
329 | #define MAXREFLEN (1024) |
330 | ||
331 | static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result) | |
332 | { | |
333 | FILE *f; | |
334 | struct cached_refs refs; | |
335 | struct ref_list *ref; | |
336 | int retval; | |
337 | ||
338 | strcpy(name + pathlen, "packed-refs"); | |
339 | f = fopen(name, "r"); | |
340 | if (!f) | |
341 | return -1; | |
342 | read_packed_refs(f, &refs); | |
343 | fclose(f); | |
344 | ref = refs.packed; | |
345 | retval = -1; | |
346 | while (ref) { | |
347 | if (!strcmp(ref->name, refname)) { | |
348 | retval = 0; | |
349 | memcpy(result, ref->sha1, 20); | |
350 | break; | |
351 | } | |
352 | ref = ref->next; | |
353 | } | |
354 | free_ref_list(refs.packed); | |
355 | return retval; | |
356 | } | |
357 | ||
358 | static int resolve_gitlink_ref_recursive(char *name, int pathlen, const char *refname, unsigned char *result, int recursion) | |
359 | { | |
360 | int fd, len = strlen(refname); | |
361 | char buffer[128], *p; | |
362 | ||
363 | if (recursion > MAXDEPTH || len > MAXREFLEN) | |
364 | return -1; | |
365 | memcpy(name + pathlen, refname, len+1); | |
366 | fd = open(name, O_RDONLY); | |
367 | if (fd < 0) | |
368 | return resolve_gitlink_packed_ref(name, pathlen, refname, result); | |
369 | ||
370 | len = read(fd, buffer, sizeof(buffer)-1); | |
371 | close(fd); | |
372 | if (len < 0) | |
373 | return -1; | |
374 | while (len && isspace(buffer[len-1])) | |
375 | len--; | |
376 | buffer[len] = 0; | |
377 | ||
378 | /* Was it a detached head or an old-fashioned symlink? */ | |
379 | if (!get_sha1_hex(buffer, result)) | |
380 | return 0; | |
381 | ||
382 | /* Symref? */ | |
383 | if (strncmp(buffer, "ref:", 4)) | |
384 | return -1; | |
385 | p = buffer + 4; | |
386 | while (isspace(*p)) | |
387 | p++; | |
388 | ||
389 | return resolve_gitlink_ref_recursive(name, pathlen, p, result, recursion+1); | |
390 | } | |
391 | ||
392 | int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result) | |
393 | { | |
394 | int len = strlen(path), retval; | |
395 | char *gitdir; | |
842abf06 | 396 | const char *tmp; |
0ebde32c LT |
397 | |
398 | while (len && path[len-1] == '/') | |
399 | len--; | |
400 | if (!len) | |
401 | return -1; | |
402 | gitdir = xmalloc(len + MAXREFLEN + 8); | |
403 | memcpy(gitdir, path, len); | |
842abf06 LH |
404 | memcpy(gitdir + len, "/.git", 6); |
405 | len += 5; | |
406 | ||
407 | tmp = read_gitfile_gently(gitdir); | |
408 | if (tmp) { | |
409 | free(gitdir); | |
410 | len = strlen(tmp); | |
411 | gitdir = xmalloc(len + MAXREFLEN + 3); | |
412 | memcpy(gitdir, tmp, len); | |
413 | } | |
414 | gitdir[len] = '/'; | |
415 | gitdir[++len] = '\0'; | |
416 | retval = resolve_gitlink_ref_recursive(gitdir, len, refname, result, 0); | |
0ebde32c LT |
417 | free(gitdir); |
418 | return retval; | |
419 | } | |
ca8db142 | 420 | |
4886b89f CC |
421 | /* |
422 | * If the "reading" argument is set, this function finds out what _object_ | |
423 | * the ref points at by "reading" the ref. The ref, if it is not symbolic, | |
424 | * has to exist, and if it is symbolic, it has to point at an existing ref, | |
425 | * because the "read" goes through the symref to the ref it points at. | |
426 | * | |
427 | * The access that is not "reading" may often be "writing", but does not | |
428 | * have to; it can be merely checking _where it leads to_. If it is a | |
429 | * prelude to "writing" to the ref, a write to a symref that points at | |
430 | * yet-to-be-born ref will create the real ref pointed by the symref. | |
431 | * reading=0 allows the caller to check where such a symref leads to. | |
432 | */ | |
8da19775 | 433 | const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag) |
8a65ff76 | 434 | { |
0104ca09 HO |
435 | int depth = MAXDEPTH; |
436 | ssize_t len; | |
a876ed83 | 437 | char buffer[256]; |
ed378ec7 | 438 | static char ref_buffer[256]; |
ca8db142 | 439 | |
8da19775 JH |
440 | if (flag) |
441 | *flag = 0; | |
442 | ||
a876ed83 | 443 | for (;;) { |
958a4789 | 444 | char path[PATH_MAX]; |
a876ed83 JH |
445 | struct stat st; |
446 | char *buf; | |
447 | int fd; | |
8a65ff76 | 448 | |
a876ed83 JH |
449 | if (--depth < 0) |
450 | return NULL; | |
ca8db142 | 451 | |
958a4789 | 452 | git_snpath(path, sizeof(path), "%s", ref); |
4886b89f | 453 | /* Special case: non-existing file. */ |
a876ed83 | 454 | if (lstat(path, &st) < 0) { |
434cd0cd LT |
455 | struct ref_list *list = get_packed_refs(); |
456 | while (list) { | |
f4204ab9 | 457 | if (!strcmp(ref, list->name)) { |
434cd0cd | 458 | hashcpy(sha1, list->sha1); |
8da19775 JH |
459 | if (flag) |
460 | *flag |= REF_ISPACKED; | |
434cd0cd LT |
461 | return ref; |
462 | } | |
463 | list = list->next; | |
464 | } | |
a876ed83 JH |
465 | if (reading || errno != ENOENT) |
466 | return NULL; | |
e702496e | 467 | hashclr(sha1); |
ed378ec7 | 468 | return ref; |
a876ed83 | 469 | } |
ca8db142 | 470 | |
a876ed83 JH |
471 | /* Follow "normalized" - ie "refs/.." symlinks by hand */ |
472 | if (S_ISLNK(st.st_mode)) { | |
473 | len = readlink(path, buffer, sizeof(buffer)-1); | |
474 | if (len >= 5 && !memcmp("refs/", buffer, 5)) { | |
ed378ec7 LT |
475 | buffer[len] = 0; |
476 | strcpy(ref_buffer, buffer); | |
477 | ref = ref_buffer; | |
8da19775 JH |
478 | if (flag) |
479 | *flag |= REF_ISSYMREF; | |
a876ed83 JH |
480 | continue; |
481 | } | |
ca8db142 | 482 | } |
a876ed83 | 483 | |
7a21632f DS |
484 | /* Is it a directory? */ |
485 | if (S_ISDIR(st.st_mode)) { | |
486 | errno = EISDIR; | |
487 | return NULL; | |
488 | } | |
489 | ||
a876ed83 JH |
490 | /* |
491 | * Anything else, just open it and try to use it as | |
492 | * a ref | |
493 | */ | |
494 | fd = open(path, O_RDONLY); | |
495 | if (fd < 0) | |
496 | return NULL; | |
93d26e4c | 497 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
a876ed83 JH |
498 | close(fd); |
499 | ||
500 | /* | |
501 | * Is it a symbolic ref? | |
502 | */ | |
503 | if (len < 4 || memcmp("ref:", buffer, 4)) | |
504 | break; | |
505 | buf = buffer + 4; | |
506 | len -= 4; | |
507 | while (len && isspace(*buf)) | |
508 | buf++, len--; | |
509 | while (len && isspace(buf[len-1])) | |
ed378ec7 LT |
510 | len--; |
511 | buf[len] = 0; | |
512 | memcpy(ref_buffer, buf, len + 1); | |
513 | ref = ref_buffer; | |
8da19775 JH |
514 | if (flag) |
515 | *flag |= REF_ISSYMREF; | |
8a65ff76 | 516 | } |
a876ed83 JH |
517 | if (len < 40 || get_sha1_hex(buffer, sha1)) |
518 | return NULL; | |
ed378ec7 | 519 | return ref; |
a876ed83 JH |
520 | } |
521 | ||
d08bae7e IL |
522 | /* The argument to filter_refs */ |
523 | struct ref_filter { | |
524 | const char *pattern; | |
525 | each_ref_fn *fn; | |
526 | void *cb_data; | |
527 | }; | |
528 | ||
ed378ec7 | 529 | int read_ref(const char *ref, unsigned char *sha1) |
a876ed83 | 530 | { |
8da19775 | 531 | if (resolve_ref(ref, sha1, 1, NULL)) |
a876ed83 JH |
532 | return 0; |
533 | return -1; | |
8a65ff76 LT |
534 | } |
535 | ||
f8948e2f | 536 | #define DO_FOR_EACH_INCLUDE_BROKEN 01 |
ef06b918 | 537 | static int do_one_ref(const char *base, each_ref_fn fn, int trim, |
f8948e2f | 538 | int flags, void *cb_data, struct ref_list *entry) |
ef06b918 JH |
539 | { |
540 | if (strncmp(base, entry->name, trim)) | |
541 | return 0; | |
eafb4526 JH |
542 | /* Is this a "negative ref" that represents a deleted ref? */ |
543 | if (is_null_sha1(entry->sha1)) | |
544 | return 0; | |
f8948e2f | 545 | if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { |
f8948e2f JH |
546 | if (!has_sha1_file(entry->sha1)) { |
547 | error("%s does not point to a valid object!", entry->name); | |
548 | return 0; | |
549 | } | |
ef06b918 | 550 | } |
0ae91be0 | 551 | current_ref = entry; |
ef06b918 JH |
552 | return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); |
553 | } | |
554 | ||
d08bae7e IL |
555 | static int filter_refs(const char *ref, const unsigned char *sha, int flags, |
556 | void *data) | |
557 | { | |
558 | struct ref_filter *filter = (struct ref_filter *)data; | |
559 | if (fnmatch(filter->pattern, ref, 0)) | |
560 | return 0; | |
561 | return filter->fn(ref, sha, flags, filter->cb_data); | |
562 | } | |
563 | ||
cf0adba7 JH |
564 | int peel_ref(const char *ref, unsigned char *sha1) |
565 | { | |
566 | int flag; | |
567 | unsigned char base[20]; | |
568 | struct object *o; | |
569 | ||
0ae91be0 SP |
570 | if (current_ref && (current_ref->name == ref |
571 | || !strcmp(current_ref->name, ref))) { | |
572 | if (current_ref->flag & REF_KNOWS_PEELED) { | |
573 | hashcpy(sha1, current_ref->peeled); | |
574 | return 0; | |
575 | } | |
576 | hashcpy(base, current_ref->sha1); | |
577 | goto fallback; | |
578 | } | |
579 | ||
cf0adba7 JH |
580 | if (!resolve_ref(ref, base, 1, &flag)) |
581 | return -1; | |
582 | ||
583 | if ((flag & REF_ISPACKED)) { | |
584 | struct ref_list *list = get_packed_refs(); | |
cf0adba7 JH |
585 | |
586 | while (list) { | |
f4204ab9 JH |
587 | if (!strcmp(list->name, ref)) { |
588 | if (list->flag & REF_KNOWS_PEELED) { | |
589 | hashcpy(sha1, list->peeled); | |
590 | return 0; | |
591 | } | |
592 | /* older pack-refs did not leave peeled ones */ | |
593 | break; | |
cf0adba7 JH |
594 | } |
595 | list = list->next; | |
596 | } | |
cf0adba7 JH |
597 | } |
598 | ||
0ae91be0 | 599 | fallback: |
cf0adba7 | 600 | o = parse_object(base); |
8c87dc77 | 601 | if (o && o->type == OBJ_TAG) { |
cf0adba7 JH |
602 | o = deref_tag(o, ref, 0); |
603 | if (o) { | |
604 | hashcpy(sha1, o->sha1); | |
605 | return 0; | |
606 | } | |
607 | } | |
608 | return -1; | |
609 | } | |
610 | ||
8da19775 | 611 | static int do_for_each_ref(const char *base, each_ref_fn fn, int trim, |
f8948e2f | 612 | int flags, void *cb_data) |
8a65ff76 | 613 | { |
0ae91be0 | 614 | int retval = 0; |
e1e22e37 LT |
615 | struct ref_list *packed = get_packed_refs(); |
616 | struct ref_list *loose = get_loose_refs(); | |
8a65ff76 | 617 | |
e142a3c6 DB |
618 | struct ref_list *extra; |
619 | ||
620 | for (extra = extra_refs; extra; extra = extra->next) | |
f8948e2f | 621 | retval = do_one_ref(base, fn, trim, flags, cb_data, extra); |
e142a3c6 | 622 | |
e1e22e37 LT |
623 | while (packed && loose) { |
624 | struct ref_list *entry; | |
625 | int cmp = strcmp(packed->name, loose->name); | |
626 | if (!cmp) { | |
627 | packed = packed->next; | |
628 | continue; | |
6cada6a9 | 629 | } |
e1e22e37 LT |
630 | if (cmp > 0) { |
631 | entry = loose; | |
632 | loose = loose->next; | |
633 | } else { | |
634 | entry = packed; | |
635 | packed = packed->next; | |
636 | } | |
f8948e2f | 637 | retval = do_one_ref(base, fn, trim, flags, cb_data, entry); |
e1e22e37 | 638 | if (retval) |
0ae91be0 | 639 | goto end_each; |
e1e22e37 | 640 | } |
8a65ff76 | 641 | |
ef06b918 | 642 | for (packed = packed ? packed : loose; packed; packed = packed->next) { |
f8948e2f | 643 | retval = do_one_ref(base, fn, trim, flags, cb_data, packed); |
ef06b918 | 644 | if (retval) |
0ae91be0 | 645 | goto end_each; |
8a65ff76 | 646 | } |
0ae91be0 SP |
647 | |
648 | end_each: | |
649 | current_ref = NULL; | |
650 | return retval; | |
8a65ff76 LT |
651 | } |
652 | ||
cb5d709f | 653 | int head_ref(each_ref_fn fn, void *cb_data) |
723c31fe LT |
654 | { |
655 | unsigned char sha1[20]; | |
8da19775 JH |
656 | int flag; |
657 | ||
658 | if (resolve_ref("HEAD", sha1, 1, &flag)) | |
659 | return fn("HEAD", sha1, flag, cb_data); | |
2f34ba32 | 660 | return 0; |
723c31fe LT |
661 | } |
662 | ||
cb5d709f | 663 | int for_each_ref(each_ref_fn fn, void *cb_data) |
8a65ff76 | 664 | { |
f8948e2f | 665 | return do_for_each_ref("refs/", fn, 0, 0, cb_data); |
a62be77f SE |
666 | } |
667 | ||
2a8177b6 CC |
668 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) |
669 | { | |
670 | return do_for_each_ref(prefix, fn, strlen(prefix), 0, cb_data); | |
671 | } | |
672 | ||
cb5d709f | 673 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 674 | { |
2a8177b6 | 675 | return for_each_ref_in("refs/tags/", fn, cb_data); |
a62be77f SE |
676 | } |
677 | ||
cb5d709f | 678 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 679 | { |
2a8177b6 | 680 | return for_each_ref_in("refs/heads/", fn, cb_data); |
a62be77f SE |
681 | } |
682 | ||
cb5d709f | 683 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 684 | { |
2a8177b6 | 685 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
f8948e2f JH |
686 | } |
687 | ||
29268700 CC |
688 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) |
689 | { | |
690 | return do_for_each_ref("refs/replace/", fn, 13, 0, cb_data); | |
691 | } | |
692 | ||
b09fe971 IL |
693 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
694 | const char *prefix, void *cb_data) | |
d08bae7e IL |
695 | { |
696 | struct strbuf real_pattern = STRBUF_INIT; | |
697 | struct ref_filter filter; | |
698 | const char *has_glob_specials; | |
699 | int ret; | |
700 | ||
b09fe971 | 701 | if (!prefix && prefixcmp(pattern, "refs/")) |
d08bae7e | 702 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
703 | else if (prefix) |
704 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
705 | strbuf_addstr(&real_pattern, pattern); |
706 | ||
707 | has_glob_specials = strpbrk(pattern, "?*["); | |
708 | if (!has_glob_specials) { | |
9517e6b8 | 709 | /* Append implied '/' '*' if not present. */ |
d08bae7e IL |
710 | if (real_pattern.buf[real_pattern.len - 1] != '/') |
711 | strbuf_addch(&real_pattern, '/'); | |
712 | /* No need to check for '*', there is none. */ | |
713 | strbuf_addch(&real_pattern, '*'); | |
714 | } | |
715 | ||
716 | filter.pattern = real_pattern.buf; | |
717 | filter.fn = fn; | |
718 | filter.cb_data = cb_data; | |
719 | ret = for_each_ref(filter_refs, &filter); | |
720 | ||
721 | strbuf_release(&real_pattern); | |
722 | return ret; | |
723 | } | |
724 | ||
b09fe971 IL |
725 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
726 | { | |
727 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
728 | } | |
729 | ||
f8948e2f JH |
730 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
731 | { | |
732 | return do_for_each_ref("refs/", fn, 0, | |
733 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); | |
8a65ff76 LT |
734 | } |
735 | ||
03feddd6 JH |
736 | /* |
737 | * Make sure "ref" is something reasonable to have under ".git/refs/"; | |
738 | * We do not like it if: | |
739 | * | |
740 | * - any path component of it begins with ".", or | |
741 | * - it has double dots "..", or | |
742 | * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or | |
743 | * - it ends with a "/". | |
3e262b95 | 744 | * - it ends with ".lock" |
a4c2e699 | 745 | * - it contains a "\" (backslash) |
03feddd6 JH |
746 | */ |
747 | ||
748 | static inline int bad_ref_char(int ch) | |
749 | { | |
8558fd9e | 750 | if (((unsigned) ch) <= ' ' || |
a4c2e699 | 751 | ch == '~' || ch == '^' || ch == ':' || ch == '\\') |
8558fd9e DB |
752 | return 1; |
753 | /* 2.13 Pattern Matching Notation */ | |
754 | if (ch == '?' || ch == '[') /* Unsupported */ | |
755 | return 1; | |
756 | if (ch == '*') /* Supported at the end */ | |
757 | return 2; | |
758 | return 0; | |
03feddd6 JH |
759 | } |
760 | ||
95fc7512 DB |
761 | int check_ref_format(const char *ref) |
762 | { | |
cbdffe40 | 763 | int ch, level, bad_type, last; |
abd2bde7 | 764 | int ret = CHECK_REF_FORMAT_OK; |
03feddd6 JH |
765 | const char *cp = ref; |
766 | ||
767 | level = 0; | |
768 | while (1) { | |
769 | while ((ch = *cp++) == '/') | |
770 | ; /* tolerate duplicated slashes */ | |
771 | if (!ch) | |
5f7b202a JH |
772 | /* should not end with slashes */ |
773 | return CHECK_REF_FORMAT_ERROR; | |
03feddd6 JH |
774 | |
775 | /* we are at the beginning of the path component */ | |
8558fd9e | 776 | if (ch == '.') |
5f7b202a | 777 | return CHECK_REF_FORMAT_ERROR; |
8558fd9e DB |
778 | bad_type = bad_ref_char(ch); |
779 | if (bad_type) { | |
abd2bde7 DB |
780 | if (bad_type == 2 && (!*cp || *cp == '/') && |
781 | ret == CHECK_REF_FORMAT_OK) | |
782 | ret = CHECK_REF_FORMAT_WILDCARD; | |
783 | else | |
784 | return CHECK_REF_FORMAT_ERROR; | |
8558fd9e | 785 | } |
03feddd6 | 786 | |
cbdffe40 | 787 | last = ch; |
03feddd6 JH |
788 | /* scan the rest of the path component */ |
789 | while ((ch = *cp++) != 0) { | |
8558fd9e | 790 | bad_type = bad_ref_char(ch); |
cbdffe40 | 791 | if (bad_type) |
08fbdb30 | 792 | return CHECK_REF_FORMAT_ERROR; |
03feddd6 JH |
793 | if (ch == '/') |
794 | break; | |
cbdffe40 JH |
795 | if (last == '.' && ch == '.') |
796 | return CHECK_REF_FORMAT_ERROR; | |
797 | if (last == '@' && ch == '{') | |
5f7b202a | 798 | return CHECK_REF_FORMAT_ERROR; |
cbdffe40 | 799 | last = ch; |
03feddd6 JH |
800 | } |
801 | level++; | |
802 | if (!ch) { | |
cbdffe40 JH |
803 | if (ref <= cp - 2 && cp[-2] == '.') |
804 | return CHECK_REF_FORMAT_ERROR; | |
03feddd6 | 805 | if (level < 2) |
5f7b202a | 806 | return CHECK_REF_FORMAT_ONELEVEL; |
3e262b95 SP |
807 | if (has_extension(ref, ".lock")) |
808 | return CHECK_REF_FORMAT_ERROR; | |
abd2bde7 | 809 | return ret; |
03feddd6 JH |
810 | } |
811 | } | |
95fc7512 DB |
812 | } |
813 | ||
4577e483 | 814 | const char *prettify_refname(const char *name) |
a9c37a72 | 815 | { |
a9c37a72 DB |
816 | return name + ( |
817 | !prefixcmp(name, "refs/heads/") ? 11 : | |
818 | !prefixcmp(name, "refs/tags/") ? 10 : | |
819 | !prefixcmp(name, "refs/remotes/") ? 13 : | |
820 | 0); | |
821 | } | |
822 | ||
79803322 SP |
823 | const char *ref_rev_parse_rules[] = { |
824 | "%.*s", | |
825 | "refs/%.*s", | |
826 | "refs/tags/%.*s", | |
827 | "refs/heads/%.*s", | |
828 | "refs/remotes/%.*s", | |
829 | "refs/remotes/%.*s/HEAD", | |
830 | NULL | |
831 | }; | |
832 | ||
605b4978 SP |
833 | const char *ref_fetch_rules[] = { |
834 | "%.*s", | |
835 | "refs/%.*s", | |
836 | "refs/heads/%.*s", | |
837 | NULL | |
838 | }; | |
839 | ||
79803322 SP |
840 | int refname_match(const char *abbrev_name, const char *full_name, const char **rules) |
841 | { | |
842 | const char **p; | |
843 | const int abbrev_name_len = strlen(abbrev_name); | |
844 | ||
845 | for (p = rules; *p; p++) { | |
846 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { | |
847 | return 1; | |
848 | } | |
849 | } | |
850 | ||
851 | return 0; | |
852 | } | |
853 | ||
e5f38ec3 | 854 | static struct ref_lock *verify_lock(struct ref_lock *lock, |
4bd18c43 SP |
855 | const unsigned char *old_sha1, int mustexist) |
856 | { | |
8da19775 | 857 | if (!resolve_ref(lock->ref_name, lock->old_sha1, mustexist, NULL)) { |
434cd0cd | 858 | error("Can't verify ref %s", lock->ref_name); |
4bd18c43 SP |
859 | unlock_ref(lock); |
860 | return NULL; | |
861 | } | |
a89fccd2 | 862 | if (hashcmp(lock->old_sha1, old_sha1)) { |
434cd0cd | 863 | error("Ref %s is at %s but expected %s", lock->ref_name, |
4bd18c43 SP |
864 | sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1)); |
865 | unlock_ref(lock); | |
866 | return NULL; | |
867 | } | |
868 | return lock; | |
869 | } | |
870 | ||
7155b727 | 871 | static int remove_empty_directories(const char *file) |
bc7127ef JH |
872 | { |
873 | /* we want to create a file but there is a directory there; | |
874 | * if that is an empty directory (or a directory that contains | |
875 | * only empty directories), remove them. | |
876 | */ | |
7155b727 JS |
877 | struct strbuf path; |
878 | int result; | |
bc7127ef | 879 | |
7155b727 JS |
880 | strbuf_init(&path, 20); |
881 | strbuf_addstr(&path, file); | |
882 | ||
a0f4afbe | 883 | result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY); |
7155b727 JS |
884 | |
885 | strbuf_release(&path); | |
886 | ||
887 | return result; | |
bc7127ef JH |
888 | } |
889 | ||
c976d415 LH |
890 | static int is_refname_available(const char *ref, const char *oldref, |
891 | struct ref_list *list, int quiet) | |
892 | { | |
893 | int namlen = strlen(ref); /* e.g. 'foo/bar' */ | |
894 | while (list) { | |
895 | /* list->name could be 'foo' or 'foo/bar/baz' */ | |
896 | if (!oldref || strcmp(oldref, list->name)) { | |
897 | int len = strlen(list->name); | |
898 | int cmplen = (namlen < len) ? namlen : len; | |
899 | const char *lead = (namlen < len) ? list->name : ref; | |
900 | if (!strncmp(ref, list->name, cmplen) && | |
901 | lead[cmplen] == '/') { | |
902 | if (!quiet) | |
903 | error("'%s' exists; cannot create '%s'", | |
904 | list->name, ref); | |
905 | return 0; | |
906 | } | |
907 | } | |
908 | list = list->next; | |
909 | } | |
910 | return 1; | |
911 | } | |
912 | ||
68db31cc | 913 | static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p) |
4bd18c43 | 914 | { |
434cd0cd | 915 | char *ref_file; |
ed378ec7 | 916 | const char *orig_ref = ref; |
4bd18c43 | 917 | struct ref_lock *lock; |
5cc3cef9 | 918 | int last_errno = 0; |
acd3b9ec | 919 | int type, lflags; |
4431fcc4 | 920 | int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); |
5bdd8d4a | 921 | int missing = 0; |
4bd18c43 SP |
922 | |
923 | lock = xcalloc(1, sizeof(struct ref_lock)); | |
924 | lock->lock_fd = -1; | |
925 | ||
68db31cc | 926 | ref = resolve_ref(ref, lock->old_sha1, mustexist, &type); |
bc7127ef JH |
927 | if (!ref && errno == EISDIR) { |
928 | /* we are trying to lock foo but we used to | |
929 | * have foo/bar which now does not exist; | |
930 | * it is normal for the empty directory 'foo' | |
931 | * to remain. | |
932 | */ | |
933 | ref_file = git_path("%s", orig_ref); | |
5cc3cef9 JH |
934 | if (remove_empty_directories(ref_file)) { |
935 | last_errno = errno; | |
936 | error("there are still refs under '%s'", orig_ref); | |
937 | goto error_return; | |
938 | } | |
68db31cc | 939 | ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, &type); |
bc7127ef | 940 | } |
68db31cc SV |
941 | if (type_p) |
942 | *type_p = type; | |
ed378ec7 | 943 | if (!ref) { |
5cc3cef9 | 944 | last_errno = errno; |
818f477c | 945 | error("unable to resolve reference %s: %s", |
ed378ec7 | 946 | orig_ref, strerror(errno)); |
5cc3cef9 | 947 | goto error_return; |
4bd18c43 | 948 | } |
5bdd8d4a | 949 | missing = is_null_sha1(lock->old_sha1); |
c976d415 LH |
950 | /* When the ref did not exist and we are creating it, |
951 | * make sure there is no existing ref that is packed | |
952 | * whose name begins with our refname, nor a ref whose | |
953 | * name is a proper prefix of our refname. | |
954 | */ | |
5bdd8d4a | 955 | if (missing && |
f475e08e JK |
956 | !is_refname_available(ref, NULL, get_packed_refs(), 0)) { |
957 | last_errno = ENOTDIR; | |
c976d415 | 958 | goto error_return; |
f475e08e | 959 | } |
22a3844e | 960 | |
c33d5174 | 961 | lock->lk = xcalloc(1, sizeof(struct lock_file)); |
4bd18c43 | 962 | |
acd3b9ec JH |
963 | lflags = LOCK_DIE_ON_ERROR; |
964 | if (flags & REF_NODEREF) { | |
68db31cc | 965 | ref = orig_ref; |
acd3b9ec JH |
966 | lflags |= LOCK_NODEREF; |
967 | } | |
434cd0cd | 968 | lock->ref_name = xstrdup(ref); |
1655707c | 969 | lock->orig_ref_name = xstrdup(orig_ref); |
7c1a278d | 970 | ref_file = git_path("%s", ref); |
5bdd8d4a | 971 | if (missing) |
68db31cc SV |
972 | lock->force_write = 1; |
973 | if ((flags & REF_NODEREF) && (type & REF_ISSYMREF)) | |
974 | lock->force_write = 1; | |
4bd18c43 | 975 | |
5cc3cef9 JH |
976 | if (safe_create_leading_directories(ref_file)) { |
977 | last_errno = errno; | |
978 | error("unable to create directory for %s", ref_file); | |
979 | goto error_return; | |
980 | } | |
4bd18c43 | 981 | |
acd3b9ec | 982 | lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags); |
4bd18c43 | 983 | return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock; |
5cc3cef9 JH |
984 | |
985 | error_return: | |
986 | unlock_ref(lock); | |
987 | errno = last_errno; | |
988 | return NULL; | |
4bd18c43 SP |
989 | } |
990 | ||
4431fcc4 | 991 | struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1) |
95fc7512 | 992 | { |
53cce84c | 993 | char refpath[PATH_MAX]; |
95fc7512 | 994 | if (check_ref_format(ref)) |
4bd18c43 | 995 | return NULL; |
53cce84c | 996 | strcpy(refpath, mkpath("refs/%s", ref)); |
68db31cc | 997 | return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL); |
4bd18c43 SP |
998 | } |
999 | ||
68db31cc | 1000 | struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags) |
4bd18c43 | 1001 | { |
5f7b202a | 1002 | switch (check_ref_format(ref)) { |
5f7b202a | 1003 | default: |
257f3020 JH |
1004 | return NULL; |
1005 | case 0: | |
1006 | case CHECK_REF_FORMAT_ONELEVEL: | |
5f7b202a JH |
1007 | return lock_ref_sha1_basic(ref, old_sha1, flags, NULL); |
1008 | } | |
c0277d15 JH |
1009 | } |
1010 | ||
26a063a1 JH |
1011 | static struct lock_file packlock; |
1012 | ||
c0277d15 JH |
1013 | static int repack_without_ref(const char *refname) |
1014 | { | |
1015 | struct ref_list *list, *packed_ref_list; | |
1016 | int fd; | |
1017 | int found = 0; | |
c0277d15 JH |
1018 | |
1019 | packed_ref_list = get_packed_refs(); | |
1020 | for (list = packed_ref_list; list; list = list->next) { | |
1021 | if (!strcmp(refname, list->name)) { | |
1022 | found = 1; | |
1023 | break; | |
1024 | } | |
1025 | } | |
1026 | if (!found) | |
1027 | return 0; | |
c0277d15 | 1028 | fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0); |
1b018fd9 MV |
1029 | if (fd < 0) { |
1030 | unable_to_lock_error(git_path("packed-refs"), errno); | |
c0277d15 | 1031 | return error("cannot delete '%s' from packed refs", refname); |
1b018fd9 | 1032 | } |
c0277d15 JH |
1033 | |
1034 | for (list = packed_ref_list; list; list = list->next) { | |
1035 | char line[PATH_MAX + 100]; | |
1036 | int len; | |
1037 | ||
1038 | if (!strcmp(refname, list->name)) | |
1039 | continue; | |
1040 | len = snprintf(line, sizeof(line), "%s %s\n", | |
1041 | sha1_to_hex(list->sha1), list->name); | |
1042 | /* this should not happen but just being defensive */ | |
1043 | if (len > sizeof(line)) | |
1044 | die("too long a refname '%s'", list->name); | |
1045 | write_or_die(fd, line, len); | |
1046 | } | |
1047 | return commit_lock_file(&packlock); | |
1048 | } | |
1049 | ||
eca35a25 | 1050 | int delete_ref(const char *refname, const unsigned char *sha1, int delopt) |
c0277d15 JH |
1051 | { |
1052 | struct ref_lock *lock; | |
eca35a25 | 1053 | int err, i = 0, ret = 0, flag = 0; |
c0277d15 | 1054 | |
68db31cc | 1055 | lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); |
c0277d15 JH |
1056 | if (!lock) |
1057 | return 1; | |
045a476f | 1058 | if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { |
c0277d15 | 1059 | /* loose */ |
eca35a25 MV |
1060 | const char *path; |
1061 | ||
1062 | if (!(delopt & REF_NODEREF)) { | |
1063 | i = strlen(lock->lk->filename) - 5; /* .lock */ | |
1064 | lock->lk->filename[i] = 0; | |
1065 | path = lock->lk->filename; | |
1066 | } else { | |
9db56f71 | 1067 | path = git_path("%s", refname); |
eca35a25 | 1068 | } |
691f1a28 AR |
1069 | err = unlink_or_warn(path); |
1070 | if (err && errno != ENOENT) | |
c0277d15 | 1071 | ret = 1; |
691f1a28 | 1072 | |
eca35a25 MV |
1073 | if (!(delopt & REF_NODEREF)) |
1074 | lock->lk->filename[i] = '.'; | |
c0277d15 JH |
1075 | } |
1076 | /* removing the loose one could have resurrected an earlier | |
1077 | * packed one. Also, if it was not loose we need to repack | |
1078 | * without it. | |
1079 | */ | |
1080 | ret |= repack_without_ref(refname); | |
1081 | ||
691f1a28 | 1082 | unlink_or_warn(git_path("logs/%s", lock->ref_name)); |
c0277d15 JH |
1083 | invalidate_cached_refs(); |
1084 | unlock_ref(lock); | |
1085 | return ret; | |
4bd18c43 SP |
1086 | } |
1087 | ||
678d0f4c | 1088 | int rename_ref(const char *oldref, const char *newref, const char *logmsg) |
c976d415 LH |
1089 | { |
1090 | static const char renamed_ref[] = "RENAMED-REF"; | |
1091 | unsigned char sha1[20], orig_sha1[20]; | |
1092 | int flag = 0, logmoved = 0; | |
1093 | struct ref_lock *lock; | |
c976d415 | 1094 | struct stat loginfo; |
16c2bfbb | 1095 | int log = !lstat(git_path("logs/%s", oldref), &loginfo); |
eca35a25 | 1096 | const char *symref = NULL; |
c976d415 | 1097 | |
450d4c0f | 1098 | if (log && S_ISLNK(loginfo.st_mode)) |
c976d415 LH |
1099 | return error("reflog for %s is a symlink", oldref); |
1100 | ||
eca35a25 MV |
1101 | symref = resolve_ref(oldref, orig_sha1, 1, &flag); |
1102 | if (flag & REF_ISSYMREF) | |
fa58186c MV |
1103 | return error("refname %s is a symbolic ref, renaming it is not supported", |
1104 | oldref); | |
eca35a25 | 1105 | if (!symref) |
c976d415 LH |
1106 | return error("refname %s not found", oldref); |
1107 | ||
1108 | if (!is_refname_available(newref, oldref, get_packed_refs(), 0)) | |
1109 | return 1; | |
1110 | ||
1111 | if (!is_refname_available(newref, oldref, get_loose_refs(), 0)) | |
1112 | return 1; | |
1113 | ||
68db31cc | 1114 | lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL); |
c976d415 LH |
1115 | if (!lock) |
1116 | return error("unable to lock %s", renamed_ref); | |
1117 | lock->force_write = 1; | |
678d0f4c | 1118 | if (write_ref_sha1(lock, orig_sha1, logmsg)) |
c976d415 LH |
1119 | return error("unable to save current sha1 in %s", renamed_ref); |
1120 | ||
1121 | if (log && rename(git_path("logs/%s", oldref), git_path("tmp-renamed-log"))) | |
1122 | return error("unable to move logfile logs/%s to tmp-renamed-log: %s", | |
1123 | oldref, strerror(errno)); | |
1124 | ||
eca35a25 | 1125 | if (delete_ref(oldref, orig_sha1, REF_NODEREF)) { |
c976d415 LH |
1126 | error("unable to delete old %s", oldref); |
1127 | goto rollback; | |
1128 | } | |
1129 | ||
eca35a25 | 1130 | if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1, REF_NODEREF)) { |
c976d415 LH |
1131 | if (errno==EISDIR) { |
1132 | if (remove_empty_directories(git_path("%s", newref))) { | |
1133 | error("Directory not empty: %s", newref); | |
1134 | goto rollback; | |
1135 | } | |
1136 | } else { | |
1137 | error("unable to delete existing %s", newref); | |
1138 | goto rollback; | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | if (log && safe_create_leading_directories(git_path("logs/%s", newref))) { | |
1143 | error("unable to create directory for %s", newref); | |
1144 | goto rollback; | |
1145 | } | |
1146 | ||
1147 | retry: | |
1148 | if (log && rename(git_path("tmp-renamed-log"), git_path("logs/%s", newref))) { | |
d9e74d57 JR |
1149 | if (errno==EISDIR || errno==ENOTDIR) { |
1150 | /* | |
1151 | * rename(a, b) when b is an existing | |
1152 | * directory ought to result in ISDIR, but | |
1153 | * Solaris 5.8 gives ENOTDIR. Sheesh. | |
1154 | */ | |
c976d415 LH |
1155 | if (remove_empty_directories(git_path("logs/%s", newref))) { |
1156 | error("Directory not empty: logs/%s", newref); | |
1157 | goto rollback; | |
1158 | } | |
1159 | goto retry; | |
1160 | } else { | |
1161 | error("unable to move logfile tmp-renamed-log to logs/%s: %s", | |
1162 | newref, strerror(errno)); | |
1163 | goto rollback; | |
1164 | } | |
1165 | } | |
1166 | logmoved = log; | |
1167 | ||
68db31cc | 1168 | lock = lock_ref_sha1_basic(newref, NULL, 0, NULL); |
c976d415 LH |
1169 | if (!lock) { |
1170 | error("unable to lock %s for update", newref); | |
1171 | goto rollback; | |
1172 | } | |
c976d415 LH |
1173 | lock->force_write = 1; |
1174 | hashcpy(lock->old_sha1, orig_sha1); | |
678d0f4c | 1175 | if (write_ref_sha1(lock, orig_sha1, logmsg)) { |
c976d415 LH |
1176 | error("unable to write current sha1 into %s", newref); |
1177 | goto rollback; | |
1178 | } | |
1179 | ||
1180 | return 0; | |
1181 | ||
1182 | rollback: | |
68db31cc | 1183 | lock = lock_ref_sha1_basic(oldref, NULL, 0, NULL); |
c976d415 LH |
1184 | if (!lock) { |
1185 | error("unable to lock %s for rollback", oldref); | |
1186 | goto rollbacklog; | |
1187 | } | |
1188 | ||
1189 | lock->force_write = 1; | |
1190 | flag = log_all_ref_updates; | |
1191 | log_all_ref_updates = 0; | |
1192 | if (write_ref_sha1(lock, orig_sha1, NULL)) | |
1193 | error("unable to write current sha1 into %s", oldref); | |
1194 | log_all_ref_updates = flag; | |
1195 | ||
1196 | rollbacklog: | |
1197 | if (logmoved && rename(git_path("logs/%s", newref), git_path("logs/%s", oldref))) | |
1198 | error("unable to restore logfile %s from %s: %s", | |
1199 | oldref, newref, strerror(errno)); | |
1200 | if (!logmoved && log && | |
1201 | rename(git_path("tmp-renamed-log"), git_path("logs/%s", oldref))) | |
1202 | error("unable to restore logfile %s from tmp-renamed-log: %s", | |
1203 | oldref, strerror(errno)); | |
1204 | ||
1205 | return 1; | |
1206 | } | |
1207 | ||
435fc852 | 1208 | int close_ref(struct ref_lock *lock) |
b531394d BC |
1209 | { |
1210 | if (close_lock_file(lock->lk)) | |
1211 | return -1; | |
1212 | lock->lock_fd = -1; | |
1213 | return 0; | |
1214 | } | |
1215 | ||
435fc852 | 1216 | int commit_ref(struct ref_lock *lock) |
b531394d BC |
1217 | { |
1218 | if (commit_lock_file(lock->lk)) | |
1219 | return -1; | |
1220 | lock->lock_fd = -1; | |
1221 | return 0; | |
1222 | } | |
1223 | ||
e5f38ec3 | 1224 | void unlock_ref(struct ref_lock *lock) |
4bd18c43 | 1225 | { |
4ed7cd3a BC |
1226 | /* Do not free lock->lk -- atexit() still looks at them */ |
1227 | if (lock->lk) | |
1228 | rollback_lock_file(lock->lk); | |
434cd0cd | 1229 | free(lock->ref_name); |
1655707c | 1230 | free(lock->orig_ref_name); |
4bd18c43 SP |
1231 | free(lock); |
1232 | } | |
1233 | ||
0ec29a47 JH |
1234 | /* |
1235 | * copy the reflog message msg to buf, which has been allocated sufficiently | |
1236 | * large, while cleaning up the whitespaces. Especially, convert LF to space, | |
1237 | * because reflog file is one line per entry. | |
1238 | */ | |
1239 | static int copy_msg(char *buf, const char *msg) | |
1240 | { | |
1241 | char *cp = buf; | |
1242 | char c; | |
1243 | int wasspace = 1; | |
1244 | ||
1245 | *cp++ = '\t'; | |
1246 | while ((c = *msg++)) { | |
1247 | if (wasspace && isspace(c)) | |
1248 | continue; | |
1249 | wasspace = isspace(c); | |
1250 | if (wasspace) | |
1251 | c = ' '; | |
1252 | *cp++ = c; | |
1253 | } | |
1254 | while (buf < cp && isspace(cp[-1])) | |
1255 | cp--; | |
1256 | *cp++ = '\n'; | |
1257 | return cp - buf; | |
1258 | } | |
1259 | ||
9a13f0b7 NP |
1260 | static int log_ref_write(const char *ref_name, const unsigned char *old_sha1, |
1261 | const unsigned char *new_sha1, const char *msg) | |
6de08ae6 SP |
1262 | { |
1263 | int logfd, written, oflags = O_APPEND | O_WRONLY; | |
1264 | unsigned maxlen, len; | |
8ac65937 | 1265 | int msglen; |
958a4789 AR |
1266 | char log_file[PATH_MAX]; |
1267 | char *logrec; | |
ff4c8485 | 1268 | const char *committer; |
6de08ae6 | 1269 | |
510c5a8e | 1270 | if (log_all_ref_updates < 0) |
7d1864ce | 1271 | log_all_ref_updates = !is_bare_repository(); |
510c5a8e | 1272 | |
958a4789 | 1273 | git_snpath(log_file, sizeof(log_file), "logs/%s", ref_name); |
9a13f0b7 | 1274 | |
4057deb5 | 1275 | if (log_all_ref_updates && |
cc44c765 JH |
1276 | (!prefixcmp(ref_name, "refs/heads/") || |
1277 | !prefixcmp(ref_name, "refs/remotes/") || | |
bd104db1 | 1278 | !strcmp(ref_name, "HEAD"))) { |
9a13f0b7 | 1279 | if (safe_create_leading_directories(log_file) < 0) |
6de08ae6 | 1280 | return error("unable to create directory for %s", |
9a13f0b7 | 1281 | log_file); |
6de08ae6 SP |
1282 | oflags |= O_CREAT; |
1283 | } | |
1284 | ||
9a13f0b7 | 1285 | logfd = open(log_file, oflags, 0666); |
6de08ae6 | 1286 | if (logfd < 0) { |
1974bf62 | 1287 | if (!(oflags & O_CREAT) && errno == ENOENT) |
6de08ae6 | 1288 | return 0; |
3b463c3f JH |
1289 | |
1290 | if ((oflags & O_CREAT) && errno == EISDIR) { | |
9a13f0b7 | 1291 | if (remove_empty_directories(log_file)) { |
3b463c3f | 1292 | return error("There are still logs under '%s'", |
9a13f0b7 | 1293 | log_file); |
3b463c3f | 1294 | } |
9a13f0b7 | 1295 | logfd = open(log_file, oflags, 0666); |
3b463c3f JH |
1296 | } |
1297 | ||
1298 | if (logfd < 0) | |
1299 | return error("Unable to append to %s: %s", | |
9a13f0b7 | 1300 | log_file, strerror(errno)); |
6de08ae6 SP |
1301 | } |
1302 | ||
443b92b6 MK |
1303 | adjust_shared_perm(log_file); |
1304 | ||
0ec29a47 | 1305 | msglen = msg ? strlen(msg) : 0; |
774751a8 | 1306 | committer = git_committer_info(0); |
8ac65937 JH |
1307 | maxlen = strlen(committer) + msglen + 100; |
1308 | logrec = xmalloc(maxlen); | |
1309 | len = sprintf(logrec, "%s %s %s\n", | |
9a13f0b7 NP |
1310 | sha1_to_hex(old_sha1), |
1311 | sha1_to_hex(new_sha1), | |
8ac65937 JH |
1312 | committer); |
1313 | if (msglen) | |
0ec29a47 | 1314 | len += copy_msg(logrec + len - 1, msg) - 1; |
93822c22 | 1315 | written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1; |
6de08ae6 | 1316 | free(logrec); |
91c8d590 | 1317 | if (close(logfd) != 0 || written != len) |
9a13f0b7 | 1318 | return error("Unable to append to %s", log_file); |
6de08ae6 SP |
1319 | return 0; |
1320 | } | |
1321 | ||
c3b0dec5 LT |
1322 | static int is_branch(const char *refname) |
1323 | { | |
1324 | return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"); | |
1325 | } | |
1326 | ||
4bd18c43 SP |
1327 | int write_ref_sha1(struct ref_lock *lock, |
1328 | const unsigned char *sha1, const char *logmsg) | |
1329 | { | |
1330 | static char term = '\n'; | |
c3b0dec5 | 1331 | struct object *o; |
4bd18c43 SP |
1332 | |
1333 | if (!lock) | |
95fc7512 | 1334 | return -1; |
a89fccd2 | 1335 | if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) { |
4bd18c43 SP |
1336 | unlock_ref(lock); |
1337 | return 0; | |
95fc7512 | 1338 | } |
c3b0dec5 LT |
1339 | o = parse_object(sha1); |
1340 | if (!o) { | |
1341 | error("Trying to write ref %s with nonexistant object %s", | |
1342 | lock->ref_name, sha1_to_hex(sha1)); | |
1343 | unlock_ref(lock); | |
1344 | return -1; | |
1345 | } | |
1346 | if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) { | |
1347 | error("Trying to write non-commit object %s to branch %s", | |
1348 | sha1_to_hex(sha1), lock->ref_name); | |
1349 | unlock_ref(lock); | |
1350 | return -1; | |
1351 | } | |
93822c22 AW |
1352 | if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 || |
1353 | write_in_full(lock->lock_fd, &term, 1) != 1 | |
b531394d | 1354 | || close_ref(lock) < 0) { |
c33d5174 | 1355 | error("Couldn't write %s", lock->lk->filename); |
4bd18c43 SP |
1356 | unlock_ref(lock); |
1357 | return -1; | |
1358 | } | |
5e290ff7 | 1359 | invalidate_cached_refs(); |
bd104db1 NP |
1360 | if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 || |
1361 | (strcmp(lock->ref_name, lock->orig_ref_name) && | |
1362 | log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) { | |
6de08ae6 SP |
1363 | unlock_ref(lock); |
1364 | return -1; | |
1365 | } | |
605fac8b NP |
1366 | if (strcmp(lock->orig_ref_name, "HEAD") != 0) { |
1367 | /* | |
1368 | * Special hack: If a branch is updated directly and HEAD | |
1369 | * points to it (may happen on the remote side of a push | |
1370 | * for example) then logically the HEAD reflog should be | |
1371 | * updated too. | |
1372 | * A generic solution implies reverse symref information, | |
1373 | * but finding all symrefs pointing to the given branch | |
1374 | * would be rather costly for this rare event (the direct | |
1375 | * update of a branch) to be worth it. So let's cheat and | |
1376 | * check with HEAD only which should cover 99% of all usage | |
1377 | * scenarios (even 100% of the default ones). | |
1378 | */ | |
1379 | unsigned char head_sha1[20]; | |
1380 | int head_flag; | |
1381 | const char *head_ref; | |
1382 | head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag); | |
1383 | if (head_ref && (head_flag & REF_ISSYMREF) && | |
1384 | !strcmp(head_ref, lock->ref_name)) | |
1385 | log_ref_write("HEAD", lock->old_sha1, sha1, logmsg); | |
1386 | } | |
b531394d | 1387 | if (commit_ref(lock)) { |
434cd0cd | 1388 | error("Couldn't set %s", lock->ref_name); |
4bd18c43 SP |
1389 | unlock_ref(lock); |
1390 | return -1; | |
1391 | } | |
4bd18c43 SP |
1392 | unlock_ref(lock); |
1393 | return 0; | |
95fc7512 | 1394 | } |
d556fae2 | 1395 | |
8b5157e4 NP |
1396 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1397 | const char *logmsg) | |
41b625b0 NP |
1398 | { |
1399 | const char *lockpath; | |
1400 | char ref[1000]; | |
1401 | int fd, len, written; | |
a4f34cbb | 1402 | char *git_HEAD = git_pathdup("%s", ref_target); |
8b5157e4 NP |
1403 | unsigned char old_sha1[20], new_sha1[20]; |
1404 | ||
1405 | if (logmsg && read_ref(ref_target, old_sha1)) | |
1406 | hashclr(old_sha1); | |
41b625b0 | 1407 | |
d48744d1 JH |
1408 | if (safe_create_leading_directories(git_HEAD) < 0) |
1409 | return error("unable to create directory for %s", git_HEAD); | |
1410 | ||
41b625b0 NP |
1411 | #ifndef NO_SYMLINK_HEAD |
1412 | if (prefer_symlink_refs) { | |
1413 | unlink(git_HEAD); | |
1414 | if (!symlink(refs_heads_master, git_HEAD)) | |
8b5157e4 | 1415 | goto done; |
41b625b0 NP |
1416 | fprintf(stderr, "no symlink - falling back to symbolic ref\n"); |
1417 | } | |
1418 | #endif | |
1419 | ||
1420 | len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master); | |
1421 | if (sizeof(ref) <= len) { | |
1422 | error("refname too long: %s", refs_heads_master); | |
47fc52e2 | 1423 | goto error_free_return; |
41b625b0 NP |
1424 | } |
1425 | lockpath = mkpath("%s.lock", git_HEAD); | |
1426 | fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1427 | if (fd < 0) { | |
1428 | error("Unable to open %s for writing", lockpath); | |
47fc52e2 | 1429 | goto error_free_return; |
41b625b0 NP |
1430 | } |
1431 | written = write_in_full(fd, ref, len); | |
91c8d590 | 1432 | if (close(fd) != 0 || written != len) { |
41b625b0 | 1433 | error("Unable to write to %s", lockpath); |
47fc52e2 | 1434 | goto error_unlink_return; |
41b625b0 NP |
1435 | } |
1436 | if (rename(lockpath, git_HEAD) < 0) { | |
41b625b0 | 1437 | error("Unable to create %s", git_HEAD); |
47fc52e2 | 1438 | goto error_unlink_return; |
41b625b0 NP |
1439 | } |
1440 | if (adjust_shared_perm(git_HEAD)) { | |
41b625b0 | 1441 | error("Unable to fix permissions on %s", lockpath); |
47fc52e2 | 1442 | error_unlink_return: |
691f1a28 | 1443 | unlink_or_warn(lockpath); |
47fc52e2 JH |
1444 | error_free_return: |
1445 | free(git_HEAD); | |
1446 | return -1; | |
41b625b0 | 1447 | } |
8b5157e4 | 1448 | |
ee96d11b | 1449 | #ifndef NO_SYMLINK_HEAD |
8b5157e4 | 1450 | done: |
ee96d11b | 1451 | #endif |
8b5157e4 NP |
1452 | if (logmsg && !read_ref(refs_heads_master, new_sha1)) |
1453 | log_ref_write(ref_target, old_sha1, new_sha1, logmsg); | |
1454 | ||
47fc52e2 | 1455 | free(git_HEAD); |
41b625b0 NP |
1456 | return 0; |
1457 | } | |
1458 | ||
16d7cc90 JH |
1459 | static char *ref_msg(const char *line, const char *endp) |
1460 | { | |
1461 | const char *ep; | |
16d7cc90 | 1462 | line += 82; |
182af834 PH |
1463 | ep = memchr(line, '\n', endp - line); |
1464 | if (!ep) | |
1465 | ep = endp; | |
1466 | return xmemdupz(line, ep - line); | |
16d7cc90 JH |
1467 | } |
1468 | ||
1469 | 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 | 1470 | { |
e5229042 | 1471 | const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec; |
d556fae2 | 1472 | char *tz_c; |
e29cb53a | 1473 | int logfd, tz, reccnt = 0; |
d556fae2 SP |
1474 | struct stat st; |
1475 | unsigned long date; | |
e5229042 | 1476 | unsigned char logged_sha1[20]; |
cb48cb58 | 1477 | void *log_mapped; |
dc49cd76 | 1478 | size_t mapsz; |
d556fae2 SP |
1479 | |
1480 | logfile = git_path("logs/%s", ref); | |
1481 | logfd = open(logfile, O_RDONLY, 0); | |
1482 | if (logfd < 0) | |
d824cbba | 1483 | die_errno("Unable to read log '%s'", logfile); |
d556fae2 SP |
1484 | fstat(logfd, &st); |
1485 | if (!st.st_size) | |
1486 | die("Log %s is empty.", logfile); | |
dc49cd76 SP |
1487 | mapsz = xsize_t(st.st_size); |
1488 | log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0); | |
cb48cb58 | 1489 | logdata = log_mapped; |
d556fae2 SP |
1490 | close(logfd); |
1491 | ||
e5229042 | 1492 | lastrec = NULL; |
d556fae2 SP |
1493 | rec = logend = logdata + st.st_size; |
1494 | while (logdata < rec) { | |
e29cb53a | 1495 | reccnt++; |
d556fae2 SP |
1496 | if (logdata < rec && *(rec-1) == '\n') |
1497 | rec--; | |
e5229042 SP |
1498 | lastgt = NULL; |
1499 | while (logdata < rec && *(rec-1) != '\n') { | |
d556fae2 | 1500 | rec--; |
e5229042 SP |
1501 | if (*rec == '>') |
1502 | lastgt = rec; | |
1503 | } | |
1504 | if (!lastgt) | |
d556fae2 | 1505 | die("Log %s is corrupt.", logfile); |
e5229042 | 1506 | date = strtoul(lastgt + 1, &tz_c, 10); |
ab2a1a32 | 1507 | if (date <= at_time || cnt == 0) { |
76a44c5c | 1508 | tz = strtoul(tz_c, NULL, 10); |
16d7cc90 JH |
1509 | if (msg) |
1510 | *msg = ref_msg(rec, logend); | |
1511 | if (cutoff_time) | |
1512 | *cutoff_time = date; | |
1513 | if (cutoff_tz) | |
1514 | *cutoff_tz = tz; | |
1515 | if (cutoff_cnt) | |
76a44c5c | 1516 | *cutoff_cnt = reccnt - 1; |
e5229042 SP |
1517 | if (lastrec) { |
1518 | if (get_sha1_hex(lastrec, logged_sha1)) | |
1519 | die("Log %s is corrupt.", logfile); | |
1520 | if (get_sha1_hex(rec + 41, sha1)) | |
1521 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1522 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1523 | warning("Log %s has gap after %s.", |
73013afd | 1524 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 | 1525 | } |
e5f38ec3 JH |
1526 | } |
1527 | else if (date == at_time) { | |
e5229042 SP |
1528 | if (get_sha1_hex(rec + 41, sha1)) |
1529 | die("Log %s is corrupt.", logfile); | |
e5f38ec3 JH |
1530 | } |
1531 | else { | |
e5229042 SP |
1532 | if (get_sha1_hex(rec + 41, logged_sha1)) |
1533 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1534 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1535 | warning("Log %s unexpectedly ended on %s.", |
73013afd | 1536 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 SP |
1537 | } |
1538 | } | |
dc49cd76 | 1539 | munmap(log_mapped, mapsz); |
d556fae2 SP |
1540 | return 0; |
1541 | } | |
e5229042 | 1542 | lastrec = rec; |
ab2a1a32 JH |
1543 | if (cnt > 0) |
1544 | cnt--; | |
d556fae2 SP |
1545 | } |
1546 | ||
e5229042 SP |
1547 | rec = logdata; |
1548 | while (rec < logend && *rec != '>' && *rec != '\n') | |
1549 | rec++; | |
1550 | if (rec == logend || *rec == '\n') | |
d556fae2 | 1551 | die("Log %s is corrupt.", logfile); |
e5229042 | 1552 | date = strtoul(rec + 1, &tz_c, 10); |
d556fae2 SP |
1553 | tz = strtoul(tz_c, NULL, 10); |
1554 | if (get_sha1_hex(logdata, sha1)) | |
1555 | die("Log %s is corrupt.", logfile); | |
d1a4489a JK |
1556 | if (is_null_sha1(sha1)) { |
1557 | if (get_sha1_hex(logdata + 41, sha1)) | |
1558 | die("Log %s is corrupt.", logfile); | |
1559 | } | |
16d7cc90 JH |
1560 | if (msg) |
1561 | *msg = ref_msg(logdata, logend); | |
dc49cd76 | 1562 | munmap(log_mapped, mapsz); |
16d7cc90 JH |
1563 | |
1564 | if (cutoff_time) | |
1565 | *cutoff_time = date; | |
1566 | if (cutoff_tz) | |
1567 | *cutoff_tz = tz; | |
1568 | if (cutoff_cnt) | |
1569 | *cutoff_cnt = reccnt; | |
1570 | return 1; | |
d556fae2 | 1571 | } |
2ff81662 | 1572 | |
101d15e0 | 1573 | int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, void *cb_data) |
2ff81662 JH |
1574 | { |
1575 | const char *logfile; | |
1576 | FILE *logfp; | |
1577 | char buf[1024]; | |
2266bf27 | 1578 | int ret = 0; |
2ff81662 JH |
1579 | |
1580 | logfile = git_path("logs/%s", ref); | |
1581 | logfp = fopen(logfile, "r"); | |
1582 | if (!logfp) | |
883d60fa | 1583 | return -1; |
101d15e0 JH |
1584 | |
1585 | if (ofs) { | |
1586 | struct stat statbuf; | |
1587 | if (fstat(fileno(logfp), &statbuf) || | |
1588 | statbuf.st_size < ofs || | |
1589 | fseek(logfp, -ofs, SEEK_END) || | |
9d33f7c2 BC |
1590 | fgets(buf, sizeof(buf), logfp)) { |
1591 | fclose(logfp); | |
101d15e0 | 1592 | return -1; |
9d33f7c2 | 1593 | } |
101d15e0 JH |
1594 | } |
1595 | ||
2ff81662 JH |
1596 | while (fgets(buf, sizeof(buf), logfp)) { |
1597 | unsigned char osha1[20], nsha1[20]; | |
883d60fa JS |
1598 | char *email_end, *message; |
1599 | unsigned long timestamp; | |
2266bf27 | 1600 | int len, tz; |
2ff81662 JH |
1601 | |
1602 | /* old SP new SP name <email> SP time TAB msg LF */ | |
1603 | len = strlen(buf); | |
1604 | if (len < 83 || buf[len-1] != '\n' || | |
1605 | get_sha1_hex(buf, osha1) || buf[40] != ' ' || | |
883d60fa JS |
1606 | get_sha1_hex(buf + 41, nsha1) || buf[81] != ' ' || |
1607 | !(email_end = strchr(buf + 82, '>')) || | |
1608 | email_end[1] != ' ' || | |
1609 | !(timestamp = strtoul(email_end + 2, &message, 10)) || | |
1610 | !message || message[0] != ' ' || | |
1611 | (message[1] != '+' && message[1] != '-') || | |
1612 | !isdigit(message[2]) || !isdigit(message[3]) || | |
b4dd4856 | 1613 | !isdigit(message[4]) || !isdigit(message[5])) |
2ff81662 | 1614 | continue; /* corrupt? */ |
883d60fa JS |
1615 | email_end[1] = '\0'; |
1616 | tz = strtol(message + 1, NULL, 10); | |
b4dd4856 JS |
1617 | if (message[6] != '\t') |
1618 | message += 6; | |
1619 | else | |
1620 | message += 7; | |
883d60fa JS |
1621 | ret = fn(osha1, nsha1, buf+82, timestamp, tz, message, cb_data); |
1622 | if (ret) | |
2266bf27 | 1623 | break; |
2ff81662 JH |
1624 | } |
1625 | fclose(logfp); | |
2266bf27 | 1626 | return ret; |
2ff81662 | 1627 | } |
e29cb53a | 1628 | |
101d15e0 JH |
1629 | int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data) |
1630 | { | |
1631 | return for_each_recent_reflog_ent(ref, fn, 0, cb_data); | |
1632 | } | |
1633 | ||
eb8381c8 NP |
1634 | static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data) |
1635 | { | |
1636 | DIR *dir = opendir(git_path("logs/%s", base)); | |
fcee5a14 | 1637 | int retval = 0; |
eb8381c8 NP |
1638 | |
1639 | if (dir) { | |
1640 | struct dirent *de; | |
1641 | int baselen = strlen(base); | |
1642 | char *log = xmalloc(baselen + 257); | |
1643 | ||
1644 | memcpy(log, base, baselen); | |
1645 | if (baselen && base[baselen-1] != '/') | |
1646 | log[baselen++] = '/'; | |
1647 | ||
1648 | while ((de = readdir(dir)) != NULL) { | |
1649 | struct stat st; | |
1650 | int namelen; | |
1651 | ||
1652 | if (de->d_name[0] == '.') | |
1653 | continue; | |
1654 | namelen = strlen(de->d_name); | |
1655 | if (namelen > 255) | |
1656 | continue; | |
1657 | if (has_extension(de->d_name, ".lock")) | |
1658 | continue; | |
1659 | memcpy(log + baselen, de->d_name, namelen+1); | |
1660 | if (stat(git_path("logs/%s", log), &st) < 0) | |
1661 | continue; | |
1662 | if (S_ISDIR(st.st_mode)) { | |
1663 | retval = do_for_each_reflog(log, fn, cb_data); | |
1664 | } else { | |
1665 | unsigned char sha1[20]; | |
1666 | if (!resolve_ref(log, sha1, 0, NULL)) | |
1667 | retval = error("bad ref for %s", log); | |
1668 | else | |
1669 | retval = fn(log, sha1, 0, cb_data); | |
1670 | } | |
1671 | if (retval) | |
1672 | break; | |
1673 | } | |
1674 | free(log); | |
1675 | closedir(dir); | |
1676 | } | |
acb39f64 | 1677 | else if (*base) |
fcee5a14 | 1678 | return errno; |
eb8381c8 NP |
1679 | return retval; |
1680 | } | |
1681 | ||
1682 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
1683 | { | |
1684 | return do_for_each_reflog("", fn, cb_data); | |
1685 | } | |
3d9f037c CR |
1686 | |
1687 | int update_ref(const char *action, const char *refname, | |
1688 | const unsigned char *sha1, const unsigned char *oldval, | |
1689 | int flags, enum action_on_err onerr) | |
1690 | { | |
1691 | static struct ref_lock *lock; | |
1692 | lock = lock_any_ref_for_update(refname, oldval, flags); | |
1693 | if (!lock) { | |
1694 | const char *str = "Cannot lock the ref '%s'."; | |
1695 | switch (onerr) { | |
1696 | case MSG_ON_ERR: error(str, refname); break; | |
1697 | case DIE_ON_ERR: die(str, refname); break; | |
1698 | case QUIET_ON_ERR: break; | |
1699 | } | |
1700 | return 1; | |
1701 | } | |
1702 | if (write_ref_sha1(lock, sha1, action) < 0) { | |
1703 | const char *str = "Cannot update the ref '%s'."; | |
1704 | switch (onerr) { | |
1705 | case MSG_ON_ERR: error(str, refname); break; | |
1706 | case DIE_ON_ERR: die(str, refname); break; | |
1707 | case QUIET_ON_ERR: break; | |
1708 | } | |
1709 | return 1; | |
1710 | } | |
1711 | return 0; | |
1712 | } | |
cda69f48 | 1713 | |
5483f799 | 1714 | struct ref *find_ref_by_name(const struct ref *list, const char *name) |
cda69f48 JK |
1715 | { |
1716 | for ( ; list; list = list->next) | |
1717 | if (!strcmp(list->name, name)) | |
5483f799 | 1718 | return (struct ref *)list; |
cda69f48 JK |
1719 | return NULL; |
1720 | } | |
7c2b3029 JK |
1721 | |
1722 | /* | |
1723 | * generate a format suitable for scanf from a ref_rev_parse_rules | |
1724 | * rule, that is replace the "%.*s" spec with a "%s" spec | |
1725 | */ | |
1726 | static void gen_scanf_fmt(char *scanf_fmt, const char *rule) | |
1727 | { | |
1728 | char *spec; | |
1729 | ||
1730 | spec = strstr(rule, "%.*s"); | |
1731 | if (!spec || strstr(spec + 4, "%.*s")) | |
1732 | die("invalid rule in ref_rev_parse_rules: %s", rule); | |
1733 | ||
1734 | /* copy all until spec */ | |
1735 | strncpy(scanf_fmt, rule, spec - rule); | |
1736 | scanf_fmt[spec - rule] = '\0'; | |
1737 | /* copy new spec */ | |
1738 | strcat(scanf_fmt, "%s"); | |
1739 | /* copy remaining rule */ | |
1740 | strcat(scanf_fmt, spec + 4); | |
1741 | ||
1742 | return; | |
1743 | } | |
1744 | ||
6e7b3309 | 1745 | char *shorten_unambiguous_ref(const char *ref, int strict) |
7c2b3029 JK |
1746 | { |
1747 | int i; | |
1748 | static char **scanf_fmts; | |
1749 | static int nr_rules; | |
1750 | char *short_name; | |
1751 | ||
1752 | /* pre generate scanf formats from ref_rev_parse_rules[] */ | |
1753 | if (!nr_rules) { | |
1754 | size_t total_len = 0; | |
1755 | ||
1756 | /* the rule list is NULL terminated, count them first */ | |
1757 | for (; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
1758 | /* no +1 because strlen("%s") < strlen("%.*s") */ | |
1759 | total_len += strlen(ref_rev_parse_rules[nr_rules]); | |
1760 | ||
1761 | scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); | |
1762 | ||
1763 | total_len = 0; | |
1764 | for (i = 0; i < nr_rules; i++) { | |
1765 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] | |
1766 | + total_len; | |
1767 | gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); | |
1768 | total_len += strlen(ref_rev_parse_rules[i]); | |
1769 | } | |
1770 | } | |
1771 | ||
1772 | /* bail out if there are no rules */ | |
1773 | if (!nr_rules) | |
1774 | return xstrdup(ref); | |
1775 | ||
1776 | /* buffer for scanf result, at most ref must fit */ | |
1777 | short_name = xstrdup(ref); | |
1778 | ||
1779 | /* skip first rule, it will always match */ | |
1780 | for (i = nr_rules - 1; i > 0 ; --i) { | |
1781 | int j; | |
6e7b3309 | 1782 | int rules_to_fail = i; |
7c2b3029 JK |
1783 | int short_name_len; |
1784 | ||
1785 | if (1 != sscanf(ref, scanf_fmts[i], short_name)) | |
1786 | continue; | |
1787 | ||
1788 | short_name_len = strlen(short_name); | |
1789 | ||
6e7b3309 BW |
1790 | /* |
1791 | * in strict mode, all (except the matched one) rules | |
1792 | * must fail to resolve to a valid non-ambiguous ref | |
1793 | */ | |
1794 | if (strict) | |
1795 | rules_to_fail = nr_rules; | |
1796 | ||
7c2b3029 JK |
1797 | /* |
1798 | * check if the short name resolves to a valid ref, | |
1799 | * but use only rules prior to the matched one | |
1800 | */ | |
6e7b3309 | 1801 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 JK |
1802 | const char *rule = ref_rev_parse_rules[j]; |
1803 | unsigned char short_objectname[20]; | |
1804 | char refname[PATH_MAX]; | |
1805 | ||
6e7b3309 BW |
1806 | /* skip matched rule */ |
1807 | if (i == j) | |
1808 | continue; | |
1809 | ||
7c2b3029 JK |
1810 | /* |
1811 | * the short name is ambiguous, if it resolves | |
1812 | * (with this previous rule) to a valid ref | |
1813 | * read_ref() returns 0 on success | |
1814 | */ | |
1815 | mksnpath(refname, sizeof(refname), | |
1816 | rule, short_name_len, short_name); | |
1817 | if (!read_ref(refname, short_objectname)) | |
1818 | break; | |
1819 | } | |
1820 | ||
1821 | /* | |
1822 | * short name is non-ambiguous if all previous rules | |
1823 | * haven't resolved to a valid ref | |
1824 | */ | |
6e7b3309 | 1825 | if (j == rules_to_fail) |
7c2b3029 JK |
1826 | return short_name; |
1827 | } | |
1828 | ||
1829 | free(short_name); | |
1830 | return xstrdup(ref); | |
1831 | } |