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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 | |
e01de1c9 | 9 | #define REF_BROKEN 010 |
f4204ab9 | 10 | |
e1e22e37 LT |
11 | struct ref_list { |
12 | struct ref_list *next; | |
f4204ab9 | 13 | unsigned char flag; /* ISSYMREF? ISPACKED? */ |
e1e22e37 | 14 | unsigned char sha1[20]; |
f4204ab9 | 15 | unsigned char peeled[20]; |
e1e22e37 LT |
16 | char name[FLEX_ARRAY]; |
17 | }; | |
18 | ||
f4204ab9 | 19 | static const char *parse_ref_line(char *line, unsigned char *sha1) |
e1e22e37 LT |
20 | { |
21 | /* | |
22 | * 42: the answer to everything. | |
23 | * | |
24 | * In this case, it happens to be the answer to | |
25 | * 40 (length of sha1 hex representation) | |
26 | * +1 (space in between hex and name) | |
27 | * +1 (newline at the end of the line) | |
28 | */ | |
29 | int len = strlen(line) - 42; | |
30 | ||
31 | if (len <= 0) | |
32 | return NULL; | |
33 | if (get_sha1_hex(line, sha1) < 0) | |
34 | return NULL; | |
35 | if (!isspace(line[40])) | |
36 | return NULL; | |
37 | line += 41; | |
f4204ab9 JH |
38 | if (isspace(*line)) |
39 | return NULL; | |
e1e22e37 LT |
40 | if (line[len] != '\n') |
41 | return NULL; | |
42 | line[len] = 0; | |
cf0adba7 | 43 | |
e1e22e37 LT |
44 | return line; |
45 | } | |
46 | ||
8da19775 | 47 | static struct ref_list *add_ref(const char *name, const unsigned char *sha1, |
f4204ab9 JH |
48 | int flag, struct ref_list *list, |
49 | struct ref_list **new_entry) | |
e1e22e37 LT |
50 | { |
51 | int len; | |
c774aab9 | 52 | struct ref_list *entry; |
e1e22e37 LT |
53 | |
54 | /* Allocate it and add it in.. */ | |
55 | len = strlen(name) + 1; | |
56 | entry = xmalloc(sizeof(struct ref_list) + len); | |
57 | hashcpy(entry->sha1, sha1); | |
f4204ab9 | 58 | hashclr(entry->peeled); |
e1e22e37 | 59 | memcpy(entry->name, name, len); |
8da19775 | 60 | entry->flag = flag; |
c774aab9 | 61 | entry->next = list; |
f4204ab9 JH |
62 | if (new_entry) |
63 | *new_entry = entry; | |
c774aab9 JP |
64 | return entry; |
65 | } | |
66 | ||
67 | /* merge sort the ref list */ | |
68 | static struct ref_list *sort_ref_list(struct ref_list *list) | |
69 | { | |
70 | int psize, qsize, last_merge_count, cmp; | |
71 | struct ref_list *p, *q, *l, *e; | |
72 | struct ref_list *new_list = list; | |
73 | int k = 1; | |
74 | int merge_count = 0; | |
75 | ||
76 | if (!list) | |
77 | return list; | |
78 | ||
79 | do { | |
80 | last_merge_count = merge_count; | |
81 | merge_count = 0; | |
82 | ||
83 | psize = 0; | |
84 | ||
85 | p = new_list; | |
86 | q = new_list; | |
87 | new_list = NULL; | |
88 | l = NULL; | |
89 | ||
90 | while (p) { | |
91 | merge_count++; | |
92 | ||
93 | while (psize < k && q->next) { | |
94 | q = q->next; | |
95 | psize++; | |
96 | } | |
97 | qsize = k; | |
98 | ||
99 | while ((psize > 0) || (qsize > 0 && q)) { | |
100 | if (qsize == 0 || !q) { | |
101 | e = p; | |
102 | p = p->next; | |
103 | psize--; | |
104 | } else if (psize == 0) { | |
105 | e = q; | |
106 | q = q->next; | |
107 | qsize--; | |
108 | } else { | |
109 | cmp = strcmp(q->name, p->name); | |
110 | if (cmp < 0) { | |
111 | e = q; | |
112 | q = q->next; | |
113 | qsize--; | |
114 | } else if (cmp > 0) { | |
115 | e = p; | |
116 | p = p->next; | |
117 | psize--; | |
118 | } else { | |
119 | if (hashcmp(q->sha1, p->sha1)) | |
120 | die("Duplicated ref, and SHA1s don't match: %s", | |
121 | q->name); | |
122 | warning("Duplicated ref: %s", q->name); | |
123 | e = q; | |
124 | q = q->next; | |
125 | qsize--; | |
126 | free(e); | |
127 | e = p; | |
128 | p = p->next; | |
129 | psize--; | |
130 | } | |
131 | } | |
132 | ||
133 | e->next = NULL; | |
134 | ||
135 | if (l) | |
136 | l->next = e; | |
137 | if (!new_list) | |
138 | new_list = e; | |
139 | l = e; | |
140 | } | |
141 | ||
142 | p = q; | |
143 | }; | |
144 | ||
145 | k = k * 2; | |
146 | } while ((last_merge_count != merge_count) || (last_merge_count != 1)); | |
147 | ||
148 | return new_list; | |
e1e22e37 LT |
149 | } |
150 | ||
5e290ff7 JH |
151 | /* |
152 | * Future: need to be in "struct repository" | |
153 | * when doing a full libification. | |
154 | */ | |
4175e9e3 | 155 | static struct cached_refs { |
5e290ff7 JH |
156 | char did_loose; |
157 | char did_packed; | |
158 | struct ref_list *loose; | |
159 | struct ref_list *packed; | |
160 | } cached_refs; | |
0ae91be0 | 161 | static struct ref_list *current_ref; |
5e290ff7 | 162 | |
e142a3c6 DB |
163 | static struct ref_list *extra_refs; |
164 | ||
5e290ff7 JH |
165 | static void free_ref_list(struct ref_list *list) |
166 | { | |
167 | struct ref_list *next; | |
168 | for ( ; list; list = next) { | |
169 | next = list->next; | |
170 | free(list); | |
171 | } | |
172 | } | |
173 | ||
174 | static void invalidate_cached_refs(void) | |
e1e22e37 | 175 | { |
5e290ff7 JH |
176 | struct cached_refs *ca = &cached_refs; |
177 | ||
178 | if (ca->did_loose && ca->loose) | |
179 | free_ref_list(ca->loose); | |
180 | if (ca->did_packed && ca->packed) | |
181 | free_ref_list(ca->packed); | |
182 | ca->loose = ca->packed = NULL; | |
183 | ca->did_loose = ca->did_packed = 0; | |
184 | } | |
e1e22e37 | 185 | |
f4204ab9 JH |
186 | static void read_packed_refs(FILE *f, struct cached_refs *cached_refs) |
187 | { | |
188 | struct ref_list *list = NULL; | |
189 | struct ref_list *last = NULL; | |
190 | char refline[PATH_MAX]; | |
191 | int flag = REF_ISPACKED; | |
192 | ||
193 | while (fgets(refline, sizeof(refline), f)) { | |
194 | unsigned char sha1[20]; | |
195 | const char *name; | |
196 | static const char header[] = "# pack-refs with:"; | |
197 | ||
198 | if (!strncmp(refline, header, sizeof(header)-1)) { | |
199 | const char *traits = refline + sizeof(header) - 1; | |
200 | if (strstr(traits, " peeled ")) | |
201 | flag |= REF_KNOWS_PEELED; | |
202 | /* perhaps other traits later as well */ | |
203 | continue; | |
204 | } | |
205 | ||
206 | name = parse_ref_line(refline, sha1); | |
207 | if (name) { | |
208 | list = add_ref(name, sha1, flag, list, &last); | |
209 | continue; | |
210 | } | |
211 | if (last && | |
212 | refline[0] == '^' && | |
213 | strlen(refline) == 42 && | |
214 | refline[41] == '\n' && | |
215 | !get_sha1_hex(refline + 1, sha1)) | |
216 | hashcpy(last->peeled, sha1); | |
217 | } | |
c774aab9 | 218 | cached_refs->packed = sort_ref_list(list); |
f4204ab9 JH |
219 | } |
220 | ||
e142a3c6 DB |
221 | void add_extra_ref(const char *name, const unsigned char *sha1, int flag) |
222 | { | |
223 | extra_refs = add_ref(name, sha1, flag, extra_refs, NULL); | |
224 | } | |
225 | ||
226 | void clear_extra_refs(void) | |
227 | { | |
228 | free_ref_list(extra_refs); | |
229 | extra_refs = NULL; | |
230 | } | |
231 | ||
5e290ff7 JH |
232 | static struct ref_list *get_packed_refs(void) |
233 | { | |
234 | if (!cached_refs.did_packed) { | |
e1e22e37 | 235 | FILE *f = fopen(git_path("packed-refs"), "r"); |
f4204ab9 | 236 | cached_refs.packed = NULL; |
e1e22e37 | 237 | if (f) { |
f4204ab9 | 238 | read_packed_refs(f, &cached_refs); |
e1e22e37 | 239 | fclose(f); |
e1e22e37 | 240 | } |
5e290ff7 | 241 | cached_refs.did_packed = 1; |
e1e22e37 | 242 | } |
5e290ff7 | 243 | return cached_refs.packed; |
e1e22e37 LT |
244 | } |
245 | ||
246 | static struct ref_list *get_ref_dir(const char *base, struct ref_list *list) | |
247 | { | |
248 | DIR *dir = opendir(git_path("%s", base)); | |
249 | ||
250 | if (dir) { | |
251 | struct dirent *de; | |
252 | int baselen = strlen(base); | |
ed378ec7 | 253 | char *ref = xmalloc(baselen + 257); |
e1e22e37 | 254 | |
ed378ec7 | 255 | memcpy(ref, base, baselen); |
e1e22e37 | 256 | if (baselen && base[baselen-1] != '/') |
ed378ec7 | 257 | ref[baselen++] = '/'; |
e1e22e37 LT |
258 | |
259 | while ((de = readdir(dir)) != NULL) { | |
260 | unsigned char sha1[20]; | |
261 | struct stat st; | |
8da19775 | 262 | int flag; |
e1e22e37 LT |
263 | int namelen; |
264 | ||
265 | if (de->d_name[0] == '.') | |
266 | continue; | |
267 | namelen = strlen(de->d_name); | |
268 | if (namelen > 255) | |
269 | continue; | |
270 | if (has_extension(de->d_name, ".lock")) | |
271 | continue; | |
ed378ec7 LT |
272 | memcpy(ref + baselen, de->d_name, namelen+1); |
273 | if (stat(git_path("%s", ref), &st) < 0) | |
e1e22e37 LT |
274 | continue; |
275 | if (S_ISDIR(st.st_mode)) { | |
ed378ec7 | 276 | list = get_ref_dir(ref, list); |
e1e22e37 LT |
277 | continue; |
278 | } | |
e01de1c9 | 279 | if (!resolve_ref(ref, sha1, 1, &flag)) { |
f8948e2f | 280 | hashclr(sha1); |
e01de1c9 JH |
281 | flag |= REF_BROKEN; |
282 | } | |
f4204ab9 | 283 | list = add_ref(ref, sha1, flag, list, NULL); |
e1e22e37 | 284 | } |
ed378ec7 | 285 | free(ref); |
e1e22e37 LT |
286 | closedir(dir); |
287 | } | |
c774aab9 | 288 | return sort_ref_list(list); |
e1e22e37 LT |
289 | } |
290 | ||
f8948e2f | 291 | struct warn_if_dangling_data { |
3cf6134a | 292 | FILE *fp; |
f8948e2f JH |
293 | const char *refname; |
294 | const char *msg_fmt; | |
295 | }; | |
296 | ||
297 | static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1, | |
298 | int flags, void *cb_data) | |
299 | { | |
300 | struct warn_if_dangling_data *d = cb_data; | |
301 | const char *resolves_to; | |
302 | unsigned char junk[20]; | |
303 | ||
304 | if (!(flags & REF_ISSYMREF)) | |
305 | return 0; | |
306 | ||
307 | resolves_to = resolve_ref(refname, junk, 0, NULL); | |
308 | if (!resolves_to || strcmp(resolves_to, d->refname)) | |
309 | return 0; | |
310 | ||
3cf6134a | 311 | fprintf(d->fp, d->msg_fmt, refname); |
f8948e2f JH |
312 | return 0; |
313 | } | |
314 | ||
3cf6134a | 315 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f8948e2f | 316 | { |
3cf6134a | 317 | struct warn_if_dangling_data data = { fp, refname, msg_fmt }; |
f8948e2f JH |
318 | for_each_rawref(warn_if_dangling_symref, &data); |
319 | } | |
320 | ||
e1e22e37 LT |
321 | static struct ref_list *get_loose_refs(void) |
322 | { | |
5e290ff7 JH |
323 | if (!cached_refs.did_loose) { |
324 | cached_refs.loose = get_ref_dir("refs", NULL); | |
325 | cached_refs.did_loose = 1; | |
e1e22e37 | 326 | } |
5e290ff7 | 327 | return cached_refs.loose; |
e1e22e37 LT |
328 | } |
329 | ||
ca8db142 LT |
330 | /* We allow "recursive" symbolic refs. Only within reason, though */ |
331 | #define MAXDEPTH 5 | |
0ebde32c LT |
332 | #define MAXREFLEN (1024) |
333 | ||
334 | static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result) | |
335 | { | |
336 | FILE *f; | |
337 | struct cached_refs refs; | |
338 | struct ref_list *ref; | |
339 | int retval; | |
340 | ||
341 | strcpy(name + pathlen, "packed-refs"); | |
342 | f = fopen(name, "r"); | |
343 | if (!f) | |
344 | return -1; | |
345 | read_packed_refs(f, &refs); | |
346 | fclose(f); | |
347 | ref = refs.packed; | |
348 | retval = -1; | |
349 | while (ref) { | |
350 | if (!strcmp(ref->name, refname)) { | |
351 | retval = 0; | |
352 | memcpy(result, ref->sha1, 20); | |
353 | break; | |
354 | } | |
355 | ref = ref->next; | |
356 | } | |
357 | free_ref_list(refs.packed); | |
358 | return retval; | |
359 | } | |
360 | ||
361 | static int resolve_gitlink_ref_recursive(char *name, int pathlen, const char *refname, unsigned char *result, int recursion) | |
362 | { | |
363 | int fd, len = strlen(refname); | |
364 | char buffer[128], *p; | |
365 | ||
366 | if (recursion > MAXDEPTH || len > MAXREFLEN) | |
367 | return -1; | |
368 | memcpy(name + pathlen, refname, len+1); | |
369 | fd = open(name, O_RDONLY); | |
370 | if (fd < 0) | |
371 | return resolve_gitlink_packed_ref(name, pathlen, refname, result); | |
372 | ||
373 | len = read(fd, buffer, sizeof(buffer)-1); | |
374 | close(fd); | |
375 | if (len < 0) | |
376 | return -1; | |
377 | while (len && isspace(buffer[len-1])) | |
378 | len--; | |
379 | buffer[len] = 0; | |
380 | ||
381 | /* Was it a detached head or an old-fashioned symlink? */ | |
382 | if (!get_sha1_hex(buffer, result)) | |
383 | return 0; | |
384 | ||
385 | /* Symref? */ | |
386 | if (strncmp(buffer, "ref:", 4)) | |
387 | return -1; | |
388 | p = buffer + 4; | |
389 | while (isspace(*p)) | |
390 | p++; | |
391 | ||
392 | return resolve_gitlink_ref_recursive(name, pathlen, p, result, recursion+1); | |
393 | } | |
394 | ||
395 | int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result) | |
396 | { | |
397 | int len = strlen(path), retval; | |
398 | char *gitdir; | |
842abf06 | 399 | const char *tmp; |
0ebde32c LT |
400 | |
401 | while (len && path[len-1] == '/') | |
402 | len--; | |
403 | if (!len) | |
404 | return -1; | |
405 | gitdir = xmalloc(len + MAXREFLEN + 8); | |
406 | memcpy(gitdir, path, len); | |
842abf06 LH |
407 | memcpy(gitdir + len, "/.git", 6); |
408 | len += 5; | |
409 | ||
410 | tmp = read_gitfile_gently(gitdir); | |
411 | if (tmp) { | |
412 | free(gitdir); | |
413 | len = strlen(tmp); | |
414 | gitdir = xmalloc(len + MAXREFLEN + 3); | |
415 | memcpy(gitdir, tmp, len); | |
416 | } | |
417 | gitdir[len] = '/'; | |
418 | gitdir[++len] = '\0'; | |
419 | retval = resolve_gitlink_ref_recursive(gitdir, len, refname, result, 0); | |
0ebde32c LT |
420 | free(gitdir); |
421 | return retval; | |
422 | } | |
ca8db142 | 423 | |
4886b89f CC |
424 | /* |
425 | * If the "reading" argument is set, this function finds out what _object_ | |
426 | * the ref points at by "reading" the ref. The ref, if it is not symbolic, | |
427 | * has to exist, and if it is symbolic, it has to point at an existing ref, | |
428 | * because the "read" goes through the symref to the ref it points at. | |
429 | * | |
430 | * The access that is not "reading" may often be "writing", but does not | |
431 | * have to; it can be merely checking _where it leads to_. If it is a | |
432 | * prelude to "writing" to the ref, a write to a symref that points at | |
433 | * yet-to-be-born ref will create the real ref pointed by the symref. | |
434 | * reading=0 allows the caller to check where such a symref leads to. | |
435 | */ | |
8da19775 | 436 | const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag) |
8a65ff76 | 437 | { |
0104ca09 HO |
438 | int depth = MAXDEPTH; |
439 | ssize_t len; | |
a876ed83 | 440 | char buffer[256]; |
ed378ec7 | 441 | static char ref_buffer[256]; |
ca8db142 | 442 | |
8da19775 JH |
443 | if (flag) |
444 | *flag = 0; | |
445 | ||
a876ed83 | 446 | for (;;) { |
958a4789 | 447 | char path[PATH_MAX]; |
a876ed83 JH |
448 | struct stat st; |
449 | char *buf; | |
450 | int fd; | |
8a65ff76 | 451 | |
a876ed83 JH |
452 | if (--depth < 0) |
453 | return NULL; | |
ca8db142 | 454 | |
958a4789 | 455 | git_snpath(path, sizeof(path), "%s", ref); |
4886b89f | 456 | /* Special case: non-existing file. */ |
a876ed83 | 457 | if (lstat(path, &st) < 0) { |
434cd0cd LT |
458 | struct ref_list *list = get_packed_refs(); |
459 | while (list) { | |
f4204ab9 | 460 | if (!strcmp(ref, list->name)) { |
434cd0cd | 461 | hashcpy(sha1, list->sha1); |
8da19775 JH |
462 | if (flag) |
463 | *flag |= REF_ISPACKED; | |
434cd0cd LT |
464 | return ref; |
465 | } | |
466 | list = list->next; | |
467 | } | |
a876ed83 JH |
468 | if (reading || errno != ENOENT) |
469 | return NULL; | |
e702496e | 470 | hashclr(sha1); |
ed378ec7 | 471 | return ref; |
a876ed83 | 472 | } |
ca8db142 | 473 | |
a876ed83 JH |
474 | /* Follow "normalized" - ie "refs/.." symlinks by hand */ |
475 | if (S_ISLNK(st.st_mode)) { | |
476 | len = readlink(path, buffer, sizeof(buffer)-1); | |
477 | if (len >= 5 && !memcmp("refs/", buffer, 5)) { | |
ed378ec7 LT |
478 | buffer[len] = 0; |
479 | strcpy(ref_buffer, buffer); | |
480 | ref = ref_buffer; | |
8da19775 JH |
481 | if (flag) |
482 | *flag |= REF_ISSYMREF; | |
a876ed83 JH |
483 | continue; |
484 | } | |
ca8db142 | 485 | } |
a876ed83 | 486 | |
7a21632f DS |
487 | /* Is it a directory? */ |
488 | if (S_ISDIR(st.st_mode)) { | |
489 | errno = EISDIR; | |
490 | return NULL; | |
491 | } | |
492 | ||
a876ed83 JH |
493 | /* |
494 | * Anything else, just open it and try to use it as | |
495 | * a ref | |
496 | */ | |
497 | fd = open(path, O_RDONLY); | |
498 | if (fd < 0) | |
499 | return NULL; | |
93d26e4c | 500 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
a876ed83 JH |
501 | close(fd); |
502 | ||
503 | /* | |
504 | * Is it a symbolic ref? | |
505 | */ | |
506 | if (len < 4 || memcmp("ref:", buffer, 4)) | |
507 | break; | |
508 | buf = buffer + 4; | |
509 | len -= 4; | |
510 | while (len && isspace(*buf)) | |
511 | buf++, len--; | |
512 | while (len && isspace(buf[len-1])) | |
ed378ec7 LT |
513 | len--; |
514 | buf[len] = 0; | |
515 | memcpy(ref_buffer, buf, len + 1); | |
516 | ref = ref_buffer; | |
8da19775 JH |
517 | if (flag) |
518 | *flag |= REF_ISSYMREF; | |
8a65ff76 | 519 | } |
a876ed83 JH |
520 | if (len < 40 || get_sha1_hex(buffer, sha1)) |
521 | return NULL; | |
ed378ec7 | 522 | return ref; |
a876ed83 JH |
523 | } |
524 | ||
d08bae7e IL |
525 | /* The argument to filter_refs */ |
526 | struct ref_filter { | |
527 | const char *pattern; | |
528 | each_ref_fn *fn; | |
529 | void *cb_data; | |
530 | }; | |
531 | ||
ed378ec7 | 532 | int read_ref(const char *ref, unsigned char *sha1) |
a876ed83 | 533 | { |
8da19775 | 534 | if (resolve_ref(ref, sha1, 1, NULL)) |
a876ed83 JH |
535 | return 0; |
536 | return -1; | |
8a65ff76 LT |
537 | } |
538 | ||
f8948e2f | 539 | #define DO_FOR_EACH_INCLUDE_BROKEN 01 |
ef06b918 | 540 | static int do_one_ref(const char *base, each_ref_fn fn, int trim, |
f8948e2f | 541 | int flags, void *cb_data, struct ref_list *entry) |
ef06b918 JH |
542 | { |
543 | if (strncmp(base, entry->name, trim)) | |
544 | return 0; | |
e01de1c9 | 545 | |
f8948e2f | 546 | if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { |
e01de1c9 JH |
547 | if (entry->flag & REF_BROKEN) |
548 | return 0; /* ignore dangling symref */ | |
f8948e2f JH |
549 | if (!has_sha1_file(entry->sha1)) { |
550 | error("%s does not point to a valid object!", entry->name); | |
551 | return 0; | |
552 | } | |
ef06b918 | 553 | } |
0ae91be0 | 554 | current_ref = entry; |
ef06b918 JH |
555 | return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); |
556 | } | |
557 | ||
d08bae7e IL |
558 | static int filter_refs(const char *ref, const unsigned char *sha, int flags, |
559 | void *data) | |
560 | { | |
561 | struct ref_filter *filter = (struct ref_filter *)data; | |
562 | if (fnmatch(filter->pattern, ref, 0)) | |
563 | return 0; | |
564 | return filter->fn(ref, sha, flags, filter->cb_data); | |
565 | } | |
566 | ||
cf0adba7 JH |
567 | int peel_ref(const char *ref, unsigned char *sha1) |
568 | { | |
569 | int flag; | |
570 | unsigned char base[20]; | |
571 | struct object *o; | |
572 | ||
0ae91be0 SP |
573 | if (current_ref && (current_ref->name == ref |
574 | || !strcmp(current_ref->name, ref))) { | |
575 | if (current_ref->flag & REF_KNOWS_PEELED) { | |
576 | hashcpy(sha1, current_ref->peeled); | |
577 | return 0; | |
578 | } | |
579 | hashcpy(base, current_ref->sha1); | |
580 | goto fallback; | |
581 | } | |
582 | ||
cf0adba7 JH |
583 | if (!resolve_ref(ref, base, 1, &flag)) |
584 | return -1; | |
585 | ||
586 | if ((flag & REF_ISPACKED)) { | |
587 | struct ref_list *list = get_packed_refs(); | |
cf0adba7 JH |
588 | |
589 | while (list) { | |
f4204ab9 JH |
590 | if (!strcmp(list->name, ref)) { |
591 | if (list->flag & REF_KNOWS_PEELED) { | |
592 | hashcpy(sha1, list->peeled); | |
593 | return 0; | |
594 | } | |
595 | /* older pack-refs did not leave peeled ones */ | |
596 | break; | |
cf0adba7 JH |
597 | } |
598 | list = list->next; | |
599 | } | |
cf0adba7 JH |
600 | } |
601 | ||
0ae91be0 | 602 | fallback: |
cf0adba7 | 603 | o = parse_object(base); |
8c87dc77 | 604 | if (o && o->type == OBJ_TAG) { |
cf0adba7 JH |
605 | o = deref_tag(o, ref, 0); |
606 | if (o) { | |
607 | hashcpy(sha1, o->sha1); | |
608 | return 0; | |
609 | } | |
610 | } | |
611 | return -1; | |
612 | } | |
613 | ||
8da19775 | 614 | static int do_for_each_ref(const char *base, each_ref_fn fn, int trim, |
f8948e2f | 615 | int flags, void *cb_data) |
8a65ff76 | 616 | { |
0ae91be0 | 617 | int retval = 0; |
e1e22e37 LT |
618 | struct ref_list *packed = get_packed_refs(); |
619 | struct ref_list *loose = get_loose_refs(); | |
8a65ff76 | 620 | |
e142a3c6 DB |
621 | struct ref_list *extra; |
622 | ||
623 | for (extra = extra_refs; extra; extra = extra->next) | |
f8948e2f | 624 | retval = do_one_ref(base, fn, trim, flags, cb_data, extra); |
e142a3c6 | 625 | |
e1e22e37 LT |
626 | while (packed && loose) { |
627 | struct ref_list *entry; | |
628 | int cmp = strcmp(packed->name, loose->name); | |
629 | if (!cmp) { | |
630 | packed = packed->next; | |
631 | continue; | |
6cada6a9 | 632 | } |
e1e22e37 LT |
633 | if (cmp > 0) { |
634 | entry = loose; | |
635 | loose = loose->next; | |
636 | } else { | |
637 | entry = packed; | |
638 | packed = packed->next; | |
639 | } | |
f8948e2f | 640 | retval = do_one_ref(base, fn, trim, flags, cb_data, entry); |
e1e22e37 | 641 | if (retval) |
0ae91be0 | 642 | goto end_each; |
e1e22e37 | 643 | } |
8a65ff76 | 644 | |
ef06b918 | 645 | for (packed = packed ? packed : loose; packed; packed = packed->next) { |
f8948e2f | 646 | retval = do_one_ref(base, fn, trim, flags, cb_data, packed); |
ef06b918 | 647 | if (retval) |
0ae91be0 | 648 | goto end_each; |
8a65ff76 | 649 | } |
0ae91be0 SP |
650 | |
651 | end_each: | |
652 | current_ref = NULL; | |
653 | return retval; | |
8a65ff76 LT |
654 | } |
655 | ||
cb5d709f | 656 | int head_ref(each_ref_fn fn, void *cb_data) |
723c31fe LT |
657 | { |
658 | unsigned char sha1[20]; | |
8da19775 JH |
659 | int flag; |
660 | ||
661 | if (resolve_ref("HEAD", sha1, 1, &flag)) | |
662 | return fn("HEAD", sha1, flag, cb_data); | |
2f34ba32 | 663 | return 0; |
723c31fe LT |
664 | } |
665 | ||
cb5d709f | 666 | int for_each_ref(each_ref_fn fn, void *cb_data) |
8a65ff76 | 667 | { |
f8948e2f | 668 | return do_for_each_ref("refs/", fn, 0, 0, cb_data); |
a62be77f SE |
669 | } |
670 | ||
2a8177b6 CC |
671 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) |
672 | { | |
673 | return do_for_each_ref(prefix, fn, strlen(prefix), 0, cb_data); | |
674 | } | |
675 | ||
cb5d709f | 676 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 677 | { |
2a8177b6 | 678 | return for_each_ref_in("refs/tags/", fn, cb_data); |
a62be77f SE |
679 | } |
680 | ||
cb5d709f | 681 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 682 | { |
2a8177b6 | 683 | return for_each_ref_in("refs/heads/", fn, cb_data); |
a62be77f SE |
684 | } |
685 | ||
cb5d709f | 686 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 687 | { |
2a8177b6 | 688 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
f8948e2f JH |
689 | } |
690 | ||
29268700 CC |
691 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) |
692 | { | |
693 | return do_for_each_ref("refs/replace/", fn, 13, 0, cb_data); | |
694 | } | |
695 | ||
b09fe971 IL |
696 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
697 | const char *prefix, void *cb_data) | |
d08bae7e IL |
698 | { |
699 | struct strbuf real_pattern = STRBUF_INIT; | |
700 | struct ref_filter filter; | |
d08bae7e IL |
701 | int ret; |
702 | ||
b09fe971 | 703 | if (!prefix && prefixcmp(pattern, "refs/")) |
d08bae7e | 704 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
705 | else if (prefix) |
706 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
707 | strbuf_addstr(&real_pattern, pattern); |
708 | ||
894a9d33 | 709 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 710 | /* Append implied '/' '*' if not present. */ |
d08bae7e IL |
711 | if (real_pattern.buf[real_pattern.len - 1] != '/') |
712 | strbuf_addch(&real_pattern, '/'); | |
713 | /* No need to check for '*', there is none. */ | |
714 | strbuf_addch(&real_pattern, '*'); | |
715 | } | |
716 | ||
717 | filter.pattern = real_pattern.buf; | |
718 | filter.fn = fn; | |
719 | filter.cb_data = cb_data; | |
720 | ret = for_each_ref(filter_refs, &filter); | |
721 | ||
722 | strbuf_release(&real_pattern); | |
723 | return ret; | |
724 | } | |
725 | ||
b09fe971 IL |
726 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
727 | { | |
728 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
729 | } | |
730 | ||
f8948e2f JH |
731 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
732 | { | |
733 | return do_for_each_ref("refs/", fn, 0, | |
734 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); | |
8a65ff76 LT |
735 | } |
736 | ||
03feddd6 JH |
737 | /* |
738 | * Make sure "ref" is something reasonable to have under ".git/refs/"; | |
739 | * We do not like it if: | |
740 | * | |
741 | * - any path component of it begins with ".", or | |
742 | * - it has double dots "..", or | |
743 | * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or | |
744 | * - it ends with a "/". | |
3e262b95 | 745 | * - it ends with ".lock" |
a4c2e699 | 746 | * - it contains a "\" (backslash) |
03feddd6 JH |
747 | */ |
748 | ||
749 | static inline int bad_ref_char(int ch) | |
750 | { | |
8558fd9e | 751 | if (((unsigned) ch) <= ' ' || |
a4c2e699 | 752 | ch == '~' || ch == '^' || ch == ':' || ch == '\\') |
8558fd9e DB |
753 | return 1; |
754 | /* 2.13 Pattern Matching Notation */ | |
755 | if (ch == '?' || ch == '[') /* Unsupported */ | |
756 | return 1; | |
757 | if (ch == '*') /* Supported at the end */ | |
758 | return 2; | |
759 | return 0; | |
03feddd6 JH |
760 | } |
761 | ||
95fc7512 DB |
762 | int check_ref_format(const char *ref) |
763 | { | |
cbdffe40 | 764 | int ch, level, bad_type, last; |
abd2bde7 | 765 | int ret = CHECK_REF_FORMAT_OK; |
03feddd6 JH |
766 | const char *cp = ref; |
767 | ||
768 | level = 0; | |
769 | while (1) { | |
770 | while ((ch = *cp++) == '/') | |
771 | ; /* tolerate duplicated slashes */ | |
772 | if (!ch) | |
5f7b202a JH |
773 | /* should not end with slashes */ |
774 | return CHECK_REF_FORMAT_ERROR; | |
03feddd6 JH |
775 | |
776 | /* we are at the beginning of the path component */ | |
8558fd9e | 777 | if (ch == '.') |
5f7b202a | 778 | return CHECK_REF_FORMAT_ERROR; |
8558fd9e DB |
779 | bad_type = bad_ref_char(ch); |
780 | if (bad_type) { | |
abd2bde7 DB |
781 | if (bad_type == 2 && (!*cp || *cp == '/') && |
782 | ret == CHECK_REF_FORMAT_OK) | |
783 | ret = CHECK_REF_FORMAT_WILDCARD; | |
784 | else | |
785 | return CHECK_REF_FORMAT_ERROR; | |
8558fd9e | 786 | } |
03feddd6 | 787 | |
cbdffe40 | 788 | last = ch; |
03feddd6 JH |
789 | /* scan the rest of the path component */ |
790 | while ((ch = *cp++) != 0) { | |
8558fd9e | 791 | bad_type = bad_ref_char(ch); |
cbdffe40 | 792 | if (bad_type) |
08fbdb30 | 793 | return CHECK_REF_FORMAT_ERROR; |
03feddd6 JH |
794 | if (ch == '/') |
795 | break; | |
cbdffe40 JH |
796 | if (last == '.' && ch == '.') |
797 | return CHECK_REF_FORMAT_ERROR; | |
798 | if (last == '@' && ch == '{') | |
5f7b202a | 799 | return CHECK_REF_FORMAT_ERROR; |
cbdffe40 | 800 | last = ch; |
03feddd6 JH |
801 | } |
802 | level++; | |
803 | if (!ch) { | |
cbdffe40 JH |
804 | if (ref <= cp - 2 && cp[-2] == '.') |
805 | return CHECK_REF_FORMAT_ERROR; | |
03feddd6 | 806 | if (level < 2) |
5f7b202a | 807 | return CHECK_REF_FORMAT_ONELEVEL; |
3e262b95 SP |
808 | if (has_extension(ref, ".lock")) |
809 | return CHECK_REF_FORMAT_ERROR; | |
abd2bde7 | 810 | return ret; |
03feddd6 JH |
811 | } |
812 | } | |
95fc7512 DB |
813 | } |
814 | ||
4577e483 | 815 | const char *prettify_refname(const char *name) |
a9c37a72 | 816 | { |
a9c37a72 DB |
817 | return name + ( |
818 | !prefixcmp(name, "refs/heads/") ? 11 : | |
819 | !prefixcmp(name, "refs/tags/") ? 10 : | |
820 | !prefixcmp(name, "refs/remotes/") ? 13 : | |
821 | 0); | |
822 | } | |
823 | ||
79803322 SP |
824 | const char *ref_rev_parse_rules[] = { |
825 | "%.*s", | |
826 | "refs/%.*s", | |
827 | "refs/tags/%.*s", | |
828 | "refs/heads/%.*s", | |
829 | "refs/remotes/%.*s", | |
830 | "refs/remotes/%.*s/HEAD", | |
831 | NULL | |
832 | }; | |
833 | ||
605b4978 SP |
834 | const char *ref_fetch_rules[] = { |
835 | "%.*s", | |
836 | "refs/%.*s", | |
837 | "refs/heads/%.*s", | |
838 | NULL | |
839 | }; | |
840 | ||
79803322 SP |
841 | int refname_match(const char *abbrev_name, const char *full_name, const char **rules) |
842 | { | |
843 | const char **p; | |
844 | const int abbrev_name_len = strlen(abbrev_name); | |
845 | ||
846 | for (p = rules; *p; p++) { | |
847 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { | |
848 | return 1; | |
849 | } | |
850 | } | |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
e5f38ec3 | 855 | static struct ref_lock *verify_lock(struct ref_lock *lock, |
4bd18c43 SP |
856 | const unsigned char *old_sha1, int mustexist) |
857 | { | |
8da19775 | 858 | if (!resolve_ref(lock->ref_name, lock->old_sha1, mustexist, NULL)) { |
434cd0cd | 859 | error("Can't verify ref %s", lock->ref_name); |
4bd18c43 SP |
860 | unlock_ref(lock); |
861 | return NULL; | |
862 | } | |
a89fccd2 | 863 | if (hashcmp(lock->old_sha1, old_sha1)) { |
434cd0cd | 864 | error("Ref %s is at %s but expected %s", lock->ref_name, |
4bd18c43 SP |
865 | sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1)); |
866 | unlock_ref(lock); | |
867 | return NULL; | |
868 | } | |
869 | return lock; | |
870 | } | |
871 | ||
7155b727 | 872 | static int remove_empty_directories(const char *file) |
bc7127ef JH |
873 | { |
874 | /* we want to create a file but there is a directory there; | |
875 | * if that is an empty directory (or a directory that contains | |
876 | * only empty directories), remove them. | |
877 | */ | |
7155b727 JS |
878 | struct strbuf path; |
879 | int result; | |
bc7127ef | 880 | |
7155b727 JS |
881 | strbuf_init(&path, 20); |
882 | strbuf_addstr(&path, file); | |
883 | ||
a0f4afbe | 884 | result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY); |
7155b727 JS |
885 | |
886 | strbuf_release(&path); | |
887 | ||
888 | return result; | |
bc7127ef JH |
889 | } |
890 | ||
c976d415 LH |
891 | static int is_refname_available(const char *ref, const char *oldref, |
892 | struct ref_list *list, int quiet) | |
893 | { | |
894 | int namlen = strlen(ref); /* e.g. 'foo/bar' */ | |
895 | while (list) { | |
896 | /* list->name could be 'foo' or 'foo/bar/baz' */ | |
897 | if (!oldref || strcmp(oldref, list->name)) { | |
898 | int len = strlen(list->name); | |
899 | int cmplen = (namlen < len) ? namlen : len; | |
900 | const char *lead = (namlen < len) ? list->name : ref; | |
901 | if (!strncmp(ref, list->name, cmplen) && | |
902 | lead[cmplen] == '/') { | |
903 | if (!quiet) | |
904 | error("'%s' exists; cannot create '%s'", | |
905 | list->name, ref); | |
906 | return 0; | |
907 | } | |
908 | } | |
909 | list = list->next; | |
910 | } | |
911 | return 1; | |
912 | } | |
913 | ||
68db31cc | 914 | static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p) |
4bd18c43 | 915 | { |
434cd0cd | 916 | char *ref_file; |
ed378ec7 | 917 | const char *orig_ref = ref; |
4bd18c43 | 918 | struct ref_lock *lock; |
5cc3cef9 | 919 | int last_errno = 0; |
acd3b9ec | 920 | int type, lflags; |
4431fcc4 | 921 | int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); |
5bdd8d4a | 922 | int missing = 0; |
4bd18c43 SP |
923 | |
924 | lock = xcalloc(1, sizeof(struct ref_lock)); | |
925 | lock->lock_fd = -1; | |
926 | ||
68db31cc | 927 | ref = resolve_ref(ref, lock->old_sha1, mustexist, &type); |
bc7127ef JH |
928 | if (!ref && errno == EISDIR) { |
929 | /* we are trying to lock foo but we used to | |
930 | * have foo/bar which now does not exist; | |
931 | * it is normal for the empty directory 'foo' | |
932 | * to remain. | |
933 | */ | |
934 | ref_file = git_path("%s", orig_ref); | |
5cc3cef9 JH |
935 | if (remove_empty_directories(ref_file)) { |
936 | last_errno = errno; | |
937 | error("there are still refs under '%s'", orig_ref); | |
938 | goto error_return; | |
939 | } | |
68db31cc | 940 | ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, &type); |
bc7127ef | 941 | } |
68db31cc SV |
942 | if (type_p) |
943 | *type_p = type; | |
ed378ec7 | 944 | if (!ref) { |
5cc3cef9 | 945 | last_errno = errno; |
818f477c | 946 | error("unable to resolve reference %s: %s", |
ed378ec7 | 947 | orig_ref, strerror(errno)); |
5cc3cef9 | 948 | goto error_return; |
4bd18c43 | 949 | } |
5bdd8d4a | 950 | missing = is_null_sha1(lock->old_sha1); |
c976d415 LH |
951 | /* When the ref did not exist and we are creating it, |
952 | * make sure there is no existing ref that is packed | |
953 | * whose name begins with our refname, nor a ref whose | |
954 | * name is a proper prefix of our refname. | |
955 | */ | |
5bdd8d4a | 956 | if (missing && |
f475e08e JK |
957 | !is_refname_available(ref, NULL, get_packed_refs(), 0)) { |
958 | last_errno = ENOTDIR; | |
c976d415 | 959 | goto error_return; |
f475e08e | 960 | } |
22a3844e | 961 | |
c33d5174 | 962 | lock->lk = xcalloc(1, sizeof(struct lock_file)); |
4bd18c43 | 963 | |
acd3b9ec JH |
964 | lflags = LOCK_DIE_ON_ERROR; |
965 | if (flags & REF_NODEREF) { | |
68db31cc | 966 | ref = orig_ref; |
acd3b9ec JH |
967 | lflags |= LOCK_NODEREF; |
968 | } | |
434cd0cd | 969 | lock->ref_name = xstrdup(ref); |
1655707c | 970 | lock->orig_ref_name = xstrdup(orig_ref); |
7c1a278d | 971 | ref_file = git_path("%s", ref); |
5bdd8d4a | 972 | if (missing) |
68db31cc SV |
973 | lock->force_write = 1; |
974 | if ((flags & REF_NODEREF) && (type & REF_ISSYMREF)) | |
975 | lock->force_write = 1; | |
4bd18c43 | 976 | |
5cc3cef9 JH |
977 | if (safe_create_leading_directories(ref_file)) { |
978 | last_errno = errno; | |
979 | error("unable to create directory for %s", ref_file); | |
980 | goto error_return; | |
981 | } | |
4bd18c43 | 982 | |
acd3b9ec | 983 | lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags); |
4bd18c43 | 984 | return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock; |
5cc3cef9 JH |
985 | |
986 | error_return: | |
987 | unlock_ref(lock); | |
988 | errno = last_errno; | |
989 | return NULL; | |
4bd18c43 SP |
990 | } |
991 | ||
4431fcc4 | 992 | struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1) |
95fc7512 | 993 | { |
53cce84c | 994 | char refpath[PATH_MAX]; |
95fc7512 | 995 | if (check_ref_format(ref)) |
4bd18c43 | 996 | return NULL; |
53cce84c | 997 | strcpy(refpath, mkpath("refs/%s", ref)); |
68db31cc | 998 | return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL); |
4bd18c43 SP |
999 | } |
1000 | ||
68db31cc | 1001 | struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags) |
4bd18c43 | 1002 | { |
5f7b202a | 1003 | switch (check_ref_format(ref)) { |
5f7b202a | 1004 | default: |
257f3020 JH |
1005 | return NULL; |
1006 | case 0: | |
1007 | case CHECK_REF_FORMAT_ONELEVEL: | |
5f7b202a JH |
1008 | return lock_ref_sha1_basic(ref, old_sha1, flags, NULL); |
1009 | } | |
c0277d15 JH |
1010 | } |
1011 | ||
26a063a1 JH |
1012 | static struct lock_file packlock; |
1013 | ||
c0277d15 JH |
1014 | static int repack_without_ref(const char *refname) |
1015 | { | |
1016 | struct ref_list *list, *packed_ref_list; | |
1017 | int fd; | |
1018 | int found = 0; | |
c0277d15 JH |
1019 | |
1020 | packed_ref_list = get_packed_refs(); | |
1021 | for (list = packed_ref_list; list; list = list->next) { | |
1022 | if (!strcmp(refname, list->name)) { | |
1023 | found = 1; | |
1024 | break; | |
1025 | } | |
1026 | } | |
1027 | if (!found) | |
1028 | return 0; | |
c0277d15 | 1029 | fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0); |
1b018fd9 MV |
1030 | if (fd < 0) { |
1031 | unable_to_lock_error(git_path("packed-refs"), errno); | |
c0277d15 | 1032 | return error("cannot delete '%s' from packed refs", refname); |
1b018fd9 | 1033 | } |
c0277d15 JH |
1034 | |
1035 | for (list = packed_ref_list; list; list = list->next) { | |
1036 | char line[PATH_MAX + 100]; | |
1037 | int len; | |
1038 | ||
1039 | if (!strcmp(refname, list->name)) | |
1040 | continue; | |
1041 | len = snprintf(line, sizeof(line), "%s %s\n", | |
1042 | sha1_to_hex(list->sha1), list->name); | |
1043 | /* this should not happen but just being defensive */ | |
1044 | if (len > sizeof(line)) | |
1045 | die("too long a refname '%s'", list->name); | |
1046 | write_or_die(fd, line, len); | |
1047 | } | |
1048 | return commit_lock_file(&packlock); | |
1049 | } | |
1050 | ||
eca35a25 | 1051 | int delete_ref(const char *refname, const unsigned char *sha1, int delopt) |
c0277d15 JH |
1052 | { |
1053 | struct ref_lock *lock; | |
eca35a25 | 1054 | int err, i = 0, ret = 0, flag = 0; |
c0277d15 | 1055 | |
68db31cc | 1056 | lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); |
c0277d15 JH |
1057 | if (!lock) |
1058 | return 1; | |
045a476f | 1059 | if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { |
c0277d15 | 1060 | /* loose */ |
eca35a25 MV |
1061 | const char *path; |
1062 | ||
1063 | if (!(delopt & REF_NODEREF)) { | |
1064 | i = strlen(lock->lk->filename) - 5; /* .lock */ | |
1065 | lock->lk->filename[i] = 0; | |
1066 | path = lock->lk->filename; | |
1067 | } else { | |
9db56f71 | 1068 | path = git_path("%s", refname); |
eca35a25 | 1069 | } |
691f1a28 AR |
1070 | err = unlink_or_warn(path); |
1071 | if (err && errno != ENOENT) | |
c0277d15 | 1072 | ret = 1; |
691f1a28 | 1073 | |
eca35a25 MV |
1074 | if (!(delopt & REF_NODEREF)) |
1075 | lock->lk->filename[i] = '.'; | |
c0277d15 JH |
1076 | } |
1077 | /* removing the loose one could have resurrected an earlier | |
1078 | * packed one. Also, if it was not loose we need to repack | |
1079 | * without it. | |
1080 | */ | |
1081 | ret |= repack_without_ref(refname); | |
1082 | ||
691f1a28 | 1083 | unlink_or_warn(git_path("logs/%s", lock->ref_name)); |
c0277d15 JH |
1084 | invalidate_cached_refs(); |
1085 | unlock_ref(lock); | |
1086 | return ret; | |
4bd18c43 SP |
1087 | } |
1088 | ||
678d0f4c | 1089 | int rename_ref(const char *oldref, const char *newref, const char *logmsg) |
c976d415 LH |
1090 | { |
1091 | static const char renamed_ref[] = "RENAMED-REF"; | |
1092 | unsigned char sha1[20], orig_sha1[20]; | |
1093 | int flag = 0, logmoved = 0; | |
1094 | struct ref_lock *lock; | |
c976d415 | 1095 | struct stat loginfo; |
16c2bfbb | 1096 | int log = !lstat(git_path("logs/%s", oldref), &loginfo); |
eca35a25 | 1097 | const char *symref = NULL; |
c976d415 | 1098 | |
450d4c0f | 1099 | if (log && S_ISLNK(loginfo.st_mode)) |
c976d415 LH |
1100 | return error("reflog for %s is a symlink", oldref); |
1101 | ||
eca35a25 MV |
1102 | symref = resolve_ref(oldref, orig_sha1, 1, &flag); |
1103 | if (flag & REF_ISSYMREF) | |
fa58186c MV |
1104 | return error("refname %s is a symbolic ref, renaming it is not supported", |
1105 | oldref); | |
eca35a25 | 1106 | if (!symref) |
c976d415 LH |
1107 | return error("refname %s not found", oldref); |
1108 | ||
1109 | if (!is_refname_available(newref, oldref, get_packed_refs(), 0)) | |
1110 | return 1; | |
1111 | ||
1112 | if (!is_refname_available(newref, oldref, get_loose_refs(), 0)) | |
1113 | return 1; | |
1114 | ||
68db31cc | 1115 | lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL); |
c976d415 LH |
1116 | if (!lock) |
1117 | return error("unable to lock %s", renamed_ref); | |
1118 | lock->force_write = 1; | |
678d0f4c | 1119 | if (write_ref_sha1(lock, orig_sha1, logmsg)) |
c976d415 LH |
1120 | return error("unable to save current sha1 in %s", renamed_ref); |
1121 | ||
1122 | if (log && rename(git_path("logs/%s", oldref), git_path("tmp-renamed-log"))) | |
1123 | return error("unable to move logfile logs/%s to tmp-renamed-log: %s", | |
1124 | oldref, strerror(errno)); | |
1125 | ||
eca35a25 | 1126 | if (delete_ref(oldref, orig_sha1, REF_NODEREF)) { |
c976d415 LH |
1127 | error("unable to delete old %s", oldref); |
1128 | goto rollback; | |
1129 | } | |
1130 | ||
eca35a25 | 1131 | if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1, REF_NODEREF)) { |
c976d415 LH |
1132 | if (errno==EISDIR) { |
1133 | if (remove_empty_directories(git_path("%s", newref))) { | |
1134 | error("Directory not empty: %s", newref); | |
1135 | goto rollback; | |
1136 | } | |
1137 | } else { | |
1138 | error("unable to delete existing %s", newref); | |
1139 | goto rollback; | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | if (log && safe_create_leading_directories(git_path("logs/%s", newref))) { | |
1144 | error("unable to create directory for %s", newref); | |
1145 | goto rollback; | |
1146 | } | |
1147 | ||
1148 | retry: | |
1149 | if (log && rename(git_path("tmp-renamed-log"), git_path("logs/%s", newref))) { | |
d9e74d57 JR |
1150 | if (errno==EISDIR || errno==ENOTDIR) { |
1151 | /* | |
1152 | * rename(a, b) when b is an existing | |
1153 | * directory ought to result in ISDIR, but | |
1154 | * Solaris 5.8 gives ENOTDIR. Sheesh. | |
1155 | */ | |
c976d415 LH |
1156 | if (remove_empty_directories(git_path("logs/%s", newref))) { |
1157 | error("Directory not empty: logs/%s", newref); | |
1158 | goto rollback; | |
1159 | } | |
1160 | goto retry; | |
1161 | } else { | |
1162 | error("unable to move logfile tmp-renamed-log to logs/%s: %s", | |
1163 | newref, strerror(errno)); | |
1164 | goto rollback; | |
1165 | } | |
1166 | } | |
1167 | logmoved = log; | |
1168 | ||
68db31cc | 1169 | lock = lock_ref_sha1_basic(newref, NULL, 0, NULL); |
c976d415 LH |
1170 | if (!lock) { |
1171 | error("unable to lock %s for update", newref); | |
1172 | goto rollback; | |
1173 | } | |
c976d415 LH |
1174 | lock->force_write = 1; |
1175 | hashcpy(lock->old_sha1, orig_sha1); | |
678d0f4c | 1176 | if (write_ref_sha1(lock, orig_sha1, logmsg)) { |
c976d415 LH |
1177 | error("unable to write current sha1 into %s", newref); |
1178 | goto rollback; | |
1179 | } | |
1180 | ||
1181 | return 0; | |
1182 | ||
1183 | rollback: | |
68db31cc | 1184 | lock = lock_ref_sha1_basic(oldref, NULL, 0, NULL); |
c976d415 LH |
1185 | if (!lock) { |
1186 | error("unable to lock %s for rollback", oldref); | |
1187 | goto rollbacklog; | |
1188 | } | |
1189 | ||
1190 | lock->force_write = 1; | |
1191 | flag = log_all_ref_updates; | |
1192 | log_all_ref_updates = 0; | |
1193 | if (write_ref_sha1(lock, orig_sha1, NULL)) | |
1194 | error("unable to write current sha1 into %s", oldref); | |
1195 | log_all_ref_updates = flag; | |
1196 | ||
1197 | rollbacklog: | |
1198 | if (logmoved && rename(git_path("logs/%s", newref), git_path("logs/%s", oldref))) | |
1199 | error("unable to restore logfile %s from %s: %s", | |
1200 | oldref, newref, strerror(errno)); | |
1201 | if (!logmoved && log && | |
1202 | rename(git_path("tmp-renamed-log"), git_path("logs/%s", oldref))) | |
1203 | error("unable to restore logfile %s from tmp-renamed-log: %s", | |
1204 | oldref, strerror(errno)); | |
1205 | ||
1206 | return 1; | |
1207 | } | |
1208 | ||
435fc852 | 1209 | int close_ref(struct ref_lock *lock) |
b531394d BC |
1210 | { |
1211 | if (close_lock_file(lock->lk)) | |
1212 | return -1; | |
1213 | lock->lock_fd = -1; | |
1214 | return 0; | |
1215 | } | |
1216 | ||
435fc852 | 1217 | int commit_ref(struct ref_lock *lock) |
b531394d BC |
1218 | { |
1219 | if (commit_lock_file(lock->lk)) | |
1220 | return -1; | |
1221 | lock->lock_fd = -1; | |
1222 | return 0; | |
1223 | } | |
1224 | ||
e5f38ec3 | 1225 | void unlock_ref(struct ref_lock *lock) |
4bd18c43 | 1226 | { |
4ed7cd3a BC |
1227 | /* Do not free lock->lk -- atexit() still looks at them */ |
1228 | if (lock->lk) | |
1229 | rollback_lock_file(lock->lk); | |
434cd0cd | 1230 | free(lock->ref_name); |
1655707c | 1231 | free(lock->orig_ref_name); |
4bd18c43 SP |
1232 | free(lock); |
1233 | } | |
1234 | ||
0ec29a47 JH |
1235 | /* |
1236 | * copy the reflog message msg to buf, which has been allocated sufficiently | |
1237 | * large, while cleaning up the whitespaces. Especially, convert LF to space, | |
1238 | * because reflog file is one line per entry. | |
1239 | */ | |
1240 | static int copy_msg(char *buf, const char *msg) | |
1241 | { | |
1242 | char *cp = buf; | |
1243 | char c; | |
1244 | int wasspace = 1; | |
1245 | ||
1246 | *cp++ = '\t'; | |
1247 | while ((c = *msg++)) { | |
1248 | if (wasspace && isspace(c)) | |
1249 | continue; | |
1250 | wasspace = isspace(c); | |
1251 | if (wasspace) | |
1252 | c = ' '; | |
1253 | *cp++ = c; | |
1254 | } | |
1255 | while (buf < cp && isspace(cp[-1])) | |
1256 | cp--; | |
1257 | *cp++ = '\n'; | |
1258 | return cp - buf; | |
1259 | } | |
1260 | ||
9a13f0b7 NP |
1261 | static int log_ref_write(const char *ref_name, const unsigned char *old_sha1, |
1262 | const unsigned char *new_sha1, const char *msg) | |
6de08ae6 SP |
1263 | { |
1264 | int logfd, written, oflags = O_APPEND | O_WRONLY; | |
1265 | unsigned maxlen, len; | |
8ac65937 | 1266 | int msglen; |
958a4789 AR |
1267 | char log_file[PATH_MAX]; |
1268 | char *logrec; | |
ff4c8485 | 1269 | const char *committer; |
6de08ae6 | 1270 | |
510c5a8e | 1271 | if (log_all_ref_updates < 0) |
7d1864ce | 1272 | log_all_ref_updates = !is_bare_repository(); |
510c5a8e | 1273 | |
958a4789 | 1274 | git_snpath(log_file, sizeof(log_file), "logs/%s", ref_name); |
9a13f0b7 | 1275 | |
4057deb5 | 1276 | if (log_all_ref_updates && |
cc44c765 JH |
1277 | (!prefixcmp(ref_name, "refs/heads/") || |
1278 | !prefixcmp(ref_name, "refs/remotes/") || | |
b2e256b0 | 1279 | !prefixcmp(ref_name, "refs/notes/") || |
bd104db1 | 1280 | !strcmp(ref_name, "HEAD"))) { |
9a13f0b7 | 1281 | if (safe_create_leading_directories(log_file) < 0) |
6de08ae6 | 1282 | return error("unable to create directory for %s", |
9a13f0b7 | 1283 | log_file); |
6de08ae6 SP |
1284 | oflags |= O_CREAT; |
1285 | } | |
1286 | ||
9a13f0b7 | 1287 | logfd = open(log_file, oflags, 0666); |
6de08ae6 | 1288 | if (logfd < 0) { |
1974bf62 | 1289 | if (!(oflags & O_CREAT) && errno == ENOENT) |
6de08ae6 | 1290 | return 0; |
3b463c3f JH |
1291 | |
1292 | if ((oflags & O_CREAT) && errno == EISDIR) { | |
9a13f0b7 | 1293 | if (remove_empty_directories(log_file)) { |
3b463c3f | 1294 | return error("There are still logs under '%s'", |
9a13f0b7 | 1295 | log_file); |
3b463c3f | 1296 | } |
9a13f0b7 | 1297 | logfd = open(log_file, oflags, 0666); |
3b463c3f JH |
1298 | } |
1299 | ||
1300 | if (logfd < 0) | |
1301 | return error("Unable to append to %s: %s", | |
9a13f0b7 | 1302 | log_file, strerror(errno)); |
6de08ae6 SP |
1303 | } |
1304 | ||
443b92b6 MK |
1305 | adjust_shared_perm(log_file); |
1306 | ||
0ec29a47 | 1307 | msglen = msg ? strlen(msg) : 0; |
774751a8 | 1308 | committer = git_committer_info(0); |
8ac65937 JH |
1309 | maxlen = strlen(committer) + msglen + 100; |
1310 | logrec = xmalloc(maxlen); | |
1311 | len = sprintf(logrec, "%s %s %s\n", | |
9a13f0b7 NP |
1312 | sha1_to_hex(old_sha1), |
1313 | sha1_to_hex(new_sha1), | |
8ac65937 JH |
1314 | committer); |
1315 | if (msglen) | |
0ec29a47 | 1316 | len += copy_msg(logrec + len - 1, msg) - 1; |
93822c22 | 1317 | written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1; |
6de08ae6 | 1318 | free(logrec); |
91c8d590 | 1319 | if (close(logfd) != 0 || written != len) |
9a13f0b7 | 1320 | return error("Unable to append to %s", log_file); |
6de08ae6 SP |
1321 | return 0; |
1322 | } | |
1323 | ||
c3b0dec5 LT |
1324 | static int is_branch(const char *refname) |
1325 | { | |
1326 | return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"); | |
1327 | } | |
1328 | ||
4bd18c43 SP |
1329 | int write_ref_sha1(struct ref_lock *lock, |
1330 | const unsigned char *sha1, const char *logmsg) | |
1331 | { | |
1332 | static char term = '\n'; | |
c3b0dec5 | 1333 | struct object *o; |
4bd18c43 SP |
1334 | |
1335 | if (!lock) | |
95fc7512 | 1336 | return -1; |
a89fccd2 | 1337 | if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) { |
4bd18c43 SP |
1338 | unlock_ref(lock); |
1339 | return 0; | |
95fc7512 | 1340 | } |
c3b0dec5 LT |
1341 | o = parse_object(sha1); |
1342 | if (!o) { | |
1343 | error("Trying to write ref %s with nonexistant object %s", | |
1344 | lock->ref_name, sha1_to_hex(sha1)); | |
1345 | unlock_ref(lock); | |
1346 | return -1; | |
1347 | } | |
1348 | if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) { | |
1349 | error("Trying to write non-commit object %s to branch %s", | |
1350 | sha1_to_hex(sha1), lock->ref_name); | |
1351 | unlock_ref(lock); | |
1352 | return -1; | |
1353 | } | |
93822c22 AW |
1354 | if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 || |
1355 | write_in_full(lock->lock_fd, &term, 1) != 1 | |
b531394d | 1356 | || close_ref(lock) < 0) { |
c33d5174 | 1357 | error("Couldn't write %s", lock->lk->filename); |
4bd18c43 SP |
1358 | unlock_ref(lock); |
1359 | return -1; | |
1360 | } | |
5e290ff7 | 1361 | invalidate_cached_refs(); |
bd104db1 NP |
1362 | if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 || |
1363 | (strcmp(lock->ref_name, lock->orig_ref_name) && | |
1364 | log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) { | |
6de08ae6 SP |
1365 | unlock_ref(lock); |
1366 | return -1; | |
1367 | } | |
605fac8b NP |
1368 | if (strcmp(lock->orig_ref_name, "HEAD") != 0) { |
1369 | /* | |
1370 | * Special hack: If a branch is updated directly and HEAD | |
1371 | * points to it (may happen on the remote side of a push | |
1372 | * for example) then logically the HEAD reflog should be | |
1373 | * updated too. | |
1374 | * A generic solution implies reverse symref information, | |
1375 | * but finding all symrefs pointing to the given branch | |
1376 | * would be rather costly for this rare event (the direct | |
1377 | * update of a branch) to be worth it. So let's cheat and | |
1378 | * check with HEAD only which should cover 99% of all usage | |
1379 | * scenarios (even 100% of the default ones). | |
1380 | */ | |
1381 | unsigned char head_sha1[20]; | |
1382 | int head_flag; | |
1383 | const char *head_ref; | |
1384 | head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag); | |
1385 | if (head_ref && (head_flag & REF_ISSYMREF) && | |
1386 | !strcmp(head_ref, lock->ref_name)) | |
1387 | log_ref_write("HEAD", lock->old_sha1, sha1, logmsg); | |
1388 | } | |
b531394d | 1389 | if (commit_ref(lock)) { |
434cd0cd | 1390 | error("Couldn't set %s", lock->ref_name); |
4bd18c43 SP |
1391 | unlock_ref(lock); |
1392 | return -1; | |
1393 | } | |
4bd18c43 SP |
1394 | unlock_ref(lock); |
1395 | return 0; | |
95fc7512 | 1396 | } |
d556fae2 | 1397 | |
8b5157e4 NP |
1398 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1399 | const char *logmsg) | |
41b625b0 NP |
1400 | { |
1401 | const char *lockpath; | |
1402 | char ref[1000]; | |
1403 | int fd, len, written; | |
a4f34cbb | 1404 | char *git_HEAD = git_pathdup("%s", ref_target); |
8b5157e4 NP |
1405 | unsigned char old_sha1[20], new_sha1[20]; |
1406 | ||
1407 | if (logmsg && read_ref(ref_target, old_sha1)) | |
1408 | hashclr(old_sha1); | |
41b625b0 | 1409 | |
d48744d1 JH |
1410 | if (safe_create_leading_directories(git_HEAD) < 0) |
1411 | return error("unable to create directory for %s", git_HEAD); | |
1412 | ||
41b625b0 NP |
1413 | #ifndef NO_SYMLINK_HEAD |
1414 | if (prefer_symlink_refs) { | |
1415 | unlink(git_HEAD); | |
1416 | if (!symlink(refs_heads_master, git_HEAD)) | |
8b5157e4 | 1417 | goto done; |
41b625b0 NP |
1418 | fprintf(stderr, "no symlink - falling back to symbolic ref\n"); |
1419 | } | |
1420 | #endif | |
1421 | ||
1422 | len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master); | |
1423 | if (sizeof(ref) <= len) { | |
1424 | error("refname too long: %s", refs_heads_master); | |
47fc52e2 | 1425 | goto error_free_return; |
41b625b0 NP |
1426 | } |
1427 | lockpath = mkpath("%s.lock", git_HEAD); | |
1428 | fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1429 | if (fd < 0) { | |
1430 | error("Unable to open %s for writing", lockpath); | |
47fc52e2 | 1431 | goto error_free_return; |
41b625b0 NP |
1432 | } |
1433 | written = write_in_full(fd, ref, len); | |
91c8d590 | 1434 | if (close(fd) != 0 || written != len) { |
41b625b0 | 1435 | error("Unable to write to %s", lockpath); |
47fc52e2 | 1436 | goto error_unlink_return; |
41b625b0 NP |
1437 | } |
1438 | if (rename(lockpath, git_HEAD) < 0) { | |
41b625b0 | 1439 | error("Unable to create %s", git_HEAD); |
47fc52e2 | 1440 | goto error_unlink_return; |
41b625b0 NP |
1441 | } |
1442 | if (adjust_shared_perm(git_HEAD)) { | |
41b625b0 | 1443 | error("Unable to fix permissions on %s", lockpath); |
47fc52e2 | 1444 | error_unlink_return: |
691f1a28 | 1445 | unlink_or_warn(lockpath); |
47fc52e2 JH |
1446 | error_free_return: |
1447 | free(git_HEAD); | |
1448 | return -1; | |
41b625b0 | 1449 | } |
8b5157e4 | 1450 | |
ee96d11b | 1451 | #ifndef NO_SYMLINK_HEAD |
8b5157e4 | 1452 | done: |
ee96d11b | 1453 | #endif |
8b5157e4 NP |
1454 | if (logmsg && !read_ref(refs_heads_master, new_sha1)) |
1455 | log_ref_write(ref_target, old_sha1, new_sha1, logmsg); | |
1456 | ||
47fc52e2 | 1457 | free(git_HEAD); |
41b625b0 NP |
1458 | return 0; |
1459 | } | |
1460 | ||
16d7cc90 JH |
1461 | static char *ref_msg(const char *line, const char *endp) |
1462 | { | |
1463 | const char *ep; | |
16d7cc90 | 1464 | line += 82; |
182af834 PH |
1465 | ep = memchr(line, '\n', endp - line); |
1466 | if (!ep) | |
1467 | ep = endp; | |
1468 | return xmemdupz(line, ep - line); | |
16d7cc90 JH |
1469 | } |
1470 | ||
1471 | 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 | 1472 | { |
e5229042 | 1473 | const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec; |
d556fae2 | 1474 | char *tz_c; |
e29cb53a | 1475 | int logfd, tz, reccnt = 0; |
d556fae2 SP |
1476 | struct stat st; |
1477 | unsigned long date; | |
e5229042 | 1478 | unsigned char logged_sha1[20]; |
cb48cb58 | 1479 | void *log_mapped; |
dc49cd76 | 1480 | size_t mapsz; |
d556fae2 SP |
1481 | |
1482 | logfile = git_path("logs/%s", ref); | |
1483 | logfd = open(logfile, O_RDONLY, 0); | |
1484 | if (logfd < 0) | |
d824cbba | 1485 | die_errno("Unable to read log '%s'", logfile); |
d556fae2 SP |
1486 | fstat(logfd, &st); |
1487 | if (!st.st_size) | |
1488 | die("Log %s is empty.", logfile); | |
dc49cd76 SP |
1489 | mapsz = xsize_t(st.st_size); |
1490 | log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0); | |
cb48cb58 | 1491 | logdata = log_mapped; |
d556fae2 SP |
1492 | close(logfd); |
1493 | ||
e5229042 | 1494 | lastrec = NULL; |
d556fae2 SP |
1495 | rec = logend = logdata + st.st_size; |
1496 | while (logdata < rec) { | |
e29cb53a | 1497 | reccnt++; |
d556fae2 SP |
1498 | if (logdata < rec && *(rec-1) == '\n') |
1499 | rec--; | |
e5229042 SP |
1500 | lastgt = NULL; |
1501 | while (logdata < rec && *(rec-1) != '\n') { | |
d556fae2 | 1502 | rec--; |
e5229042 SP |
1503 | if (*rec == '>') |
1504 | lastgt = rec; | |
1505 | } | |
1506 | if (!lastgt) | |
d556fae2 | 1507 | die("Log %s is corrupt.", logfile); |
e5229042 | 1508 | date = strtoul(lastgt + 1, &tz_c, 10); |
ab2a1a32 | 1509 | if (date <= at_time || cnt == 0) { |
76a44c5c | 1510 | tz = strtoul(tz_c, NULL, 10); |
16d7cc90 JH |
1511 | if (msg) |
1512 | *msg = ref_msg(rec, logend); | |
1513 | if (cutoff_time) | |
1514 | *cutoff_time = date; | |
1515 | if (cutoff_tz) | |
1516 | *cutoff_tz = tz; | |
1517 | if (cutoff_cnt) | |
76a44c5c | 1518 | *cutoff_cnt = reccnt - 1; |
e5229042 SP |
1519 | if (lastrec) { |
1520 | if (get_sha1_hex(lastrec, logged_sha1)) | |
1521 | die("Log %s is corrupt.", logfile); | |
1522 | if (get_sha1_hex(rec + 41, sha1)) | |
1523 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1524 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1525 | warning("Log %s has gap after %s.", |
73013afd | 1526 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 | 1527 | } |
e5f38ec3 JH |
1528 | } |
1529 | else if (date == at_time) { | |
e5229042 SP |
1530 | if (get_sha1_hex(rec + 41, sha1)) |
1531 | die("Log %s is corrupt.", logfile); | |
e5f38ec3 JH |
1532 | } |
1533 | else { | |
e5229042 SP |
1534 | if (get_sha1_hex(rec + 41, logged_sha1)) |
1535 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1536 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1537 | warning("Log %s unexpectedly ended on %s.", |
73013afd | 1538 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 SP |
1539 | } |
1540 | } | |
dc49cd76 | 1541 | munmap(log_mapped, mapsz); |
d556fae2 SP |
1542 | return 0; |
1543 | } | |
e5229042 | 1544 | lastrec = rec; |
ab2a1a32 JH |
1545 | if (cnt > 0) |
1546 | cnt--; | |
d556fae2 SP |
1547 | } |
1548 | ||
e5229042 SP |
1549 | rec = logdata; |
1550 | while (rec < logend && *rec != '>' && *rec != '\n') | |
1551 | rec++; | |
1552 | if (rec == logend || *rec == '\n') | |
d556fae2 | 1553 | die("Log %s is corrupt.", logfile); |
e5229042 | 1554 | date = strtoul(rec + 1, &tz_c, 10); |
d556fae2 SP |
1555 | tz = strtoul(tz_c, NULL, 10); |
1556 | if (get_sha1_hex(logdata, sha1)) | |
1557 | die("Log %s is corrupt.", logfile); | |
d1a4489a JK |
1558 | if (is_null_sha1(sha1)) { |
1559 | if (get_sha1_hex(logdata + 41, sha1)) | |
1560 | die("Log %s is corrupt.", logfile); | |
1561 | } | |
16d7cc90 JH |
1562 | if (msg) |
1563 | *msg = ref_msg(logdata, logend); | |
dc49cd76 | 1564 | munmap(log_mapped, mapsz); |
16d7cc90 JH |
1565 | |
1566 | if (cutoff_time) | |
1567 | *cutoff_time = date; | |
1568 | if (cutoff_tz) | |
1569 | *cutoff_tz = tz; | |
1570 | if (cutoff_cnt) | |
1571 | *cutoff_cnt = reccnt; | |
1572 | return 1; | |
d556fae2 | 1573 | } |
2ff81662 | 1574 | |
101d15e0 | 1575 | int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, void *cb_data) |
2ff81662 JH |
1576 | { |
1577 | const char *logfile; | |
1578 | FILE *logfp; | |
8ca78803 | 1579 | struct strbuf sb = STRBUF_INIT; |
2266bf27 | 1580 | int ret = 0; |
2ff81662 JH |
1581 | |
1582 | logfile = git_path("logs/%s", ref); | |
1583 | logfp = fopen(logfile, "r"); | |
1584 | if (!logfp) | |
883d60fa | 1585 | return -1; |
101d15e0 JH |
1586 | |
1587 | if (ofs) { | |
1588 | struct stat statbuf; | |
1589 | if (fstat(fileno(logfp), &statbuf) || | |
1590 | statbuf.st_size < ofs || | |
1591 | fseek(logfp, -ofs, SEEK_END) || | |
8ca78803 | 1592 | strbuf_getwholeline(&sb, logfp, '\n')) { |
9d33f7c2 | 1593 | fclose(logfp); |
8ca78803 | 1594 | strbuf_release(&sb); |
101d15e0 | 1595 | return -1; |
9d33f7c2 | 1596 | } |
101d15e0 JH |
1597 | } |
1598 | ||
8ca78803 | 1599 | while (!strbuf_getwholeline(&sb, logfp, '\n')) { |
2ff81662 | 1600 | unsigned char osha1[20], nsha1[20]; |
883d60fa JS |
1601 | char *email_end, *message; |
1602 | unsigned long timestamp; | |
8ca78803 | 1603 | int tz; |
2ff81662 JH |
1604 | |
1605 | /* old SP new SP name <email> SP time TAB msg LF */ | |
8ca78803 RS |
1606 | if (sb.len < 83 || sb.buf[sb.len - 1] != '\n' || |
1607 | get_sha1_hex(sb.buf, osha1) || sb.buf[40] != ' ' || | |
1608 | get_sha1_hex(sb.buf + 41, nsha1) || sb.buf[81] != ' ' || | |
1609 | !(email_end = strchr(sb.buf + 82, '>')) || | |
883d60fa JS |
1610 | email_end[1] != ' ' || |
1611 | !(timestamp = strtoul(email_end + 2, &message, 10)) || | |
1612 | !message || message[0] != ' ' || | |
1613 | (message[1] != '+' && message[1] != '-') || | |
1614 | !isdigit(message[2]) || !isdigit(message[3]) || | |
b4dd4856 | 1615 | !isdigit(message[4]) || !isdigit(message[5])) |
2ff81662 | 1616 | continue; /* corrupt? */ |
883d60fa JS |
1617 | email_end[1] = '\0'; |
1618 | tz = strtol(message + 1, NULL, 10); | |
b4dd4856 JS |
1619 | if (message[6] != '\t') |
1620 | message += 6; | |
1621 | else | |
1622 | message += 7; | |
8ca78803 RS |
1623 | ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message, |
1624 | cb_data); | |
883d60fa | 1625 | if (ret) |
2266bf27 | 1626 | break; |
2ff81662 JH |
1627 | } |
1628 | fclose(logfp); | |
8ca78803 | 1629 | strbuf_release(&sb); |
2266bf27 | 1630 | return ret; |
2ff81662 | 1631 | } |
e29cb53a | 1632 | |
101d15e0 JH |
1633 | int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data) |
1634 | { | |
1635 | return for_each_recent_reflog_ent(ref, fn, 0, cb_data); | |
1636 | } | |
1637 | ||
eb8381c8 NP |
1638 | static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data) |
1639 | { | |
1640 | DIR *dir = opendir(git_path("logs/%s", base)); | |
fcee5a14 | 1641 | int retval = 0; |
eb8381c8 NP |
1642 | |
1643 | if (dir) { | |
1644 | struct dirent *de; | |
1645 | int baselen = strlen(base); | |
1646 | char *log = xmalloc(baselen + 257); | |
1647 | ||
1648 | memcpy(log, base, baselen); | |
1649 | if (baselen && base[baselen-1] != '/') | |
1650 | log[baselen++] = '/'; | |
1651 | ||
1652 | while ((de = readdir(dir)) != NULL) { | |
1653 | struct stat st; | |
1654 | int namelen; | |
1655 | ||
1656 | if (de->d_name[0] == '.') | |
1657 | continue; | |
1658 | namelen = strlen(de->d_name); | |
1659 | if (namelen > 255) | |
1660 | continue; | |
1661 | if (has_extension(de->d_name, ".lock")) | |
1662 | continue; | |
1663 | memcpy(log + baselen, de->d_name, namelen+1); | |
1664 | if (stat(git_path("logs/%s", log), &st) < 0) | |
1665 | continue; | |
1666 | if (S_ISDIR(st.st_mode)) { | |
1667 | retval = do_for_each_reflog(log, fn, cb_data); | |
1668 | } else { | |
1669 | unsigned char sha1[20]; | |
1670 | if (!resolve_ref(log, sha1, 0, NULL)) | |
1671 | retval = error("bad ref for %s", log); | |
1672 | else | |
1673 | retval = fn(log, sha1, 0, cb_data); | |
1674 | } | |
1675 | if (retval) | |
1676 | break; | |
1677 | } | |
1678 | free(log); | |
1679 | closedir(dir); | |
1680 | } | |
acb39f64 | 1681 | else if (*base) |
fcee5a14 | 1682 | return errno; |
eb8381c8 NP |
1683 | return retval; |
1684 | } | |
1685 | ||
1686 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
1687 | { | |
1688 | return do_for_each_reflog("", fn, cb_data); | |
1689 | } | |
3d9f037c CR |
1690 | |
1691 | int update_ref(const char *action, const char *refname, | |
1692 | const unsigned char *sha1, const unsigned char *oldval, | |
1693 | int flags, enum action_on_err onerr) | |
1694 | { | |
1695 | static struct ref_lock *lock; | |
1696 | lock = lock_any_ref_for_update(refname, oldval, flags); | |
1697 | if (!lock) { | |
1698 | const char *str = "Cannot lock the ref '%s'."; | |
1699 | switch (onerr) { | |
1700 | case MSG_ON_ERR: error(str, refname); break; | |
1701 | case DIE_ON_ERR: die(str, refname); break; | |
1702 | case QUIET_ON_ERR: break; | |
1703 | } | |
1704 | return 1; | |
1705 | } | |
1706 | if (write_ref_sha1(lock, sha1, action) < 0) { | |
1707 | const char *str = "Cannot update the ref '%s'."; | |
1708 | switch (onerr) { | |
1709 | case MSG_ON_ERR: error(str, refname); break; | |
1710 | case DIE_ON_ERR: die(str, refname); break; | |
1711 | case QUIET_ON_ERR: break; | |
1712 | } | |
1713 | return 1; | |
1714 | } | |
1715 | return 0; | |
1716 | } | |
cda69f48 | 1717 | |
5483f799 | 1718 | struct ref *find_ref_by_name(const struct ref *list, const char *name) |
cda69f48 JK |
1719 | { |
1720 | for ( ; list; list = list->next) | |
1721 | if (!strcmp(list->name, name)) | |
5483f799 | 1722 | return (struct ref *)list; |
cda69f48 JK |
1723 | return NULL; |
1724 | } | |
7c2b3029 JK |
1725 | |
1726 | /* | |
1727 | * generate a format suitable for scanf from a ref_rev_parse_rules | |
1728 | * rule, that is replace the "%.*s" spec with a "%s" spec | |
1729 | */ | |
1730 | static void gen_scanf_fmt(char *scanf_fmt, const char *rule) | |
1731 | { | |
1732 | char *spec; | |
1733 | ||
1734 | spec = strstr(rule, "%.*s"); | |
1735 | if (!spec || strstr(spec + 4, "%.*s")) | |
1736 | die("invalid rule in ref_rev_parse_rules: %s", rule); | |
1737 | ||
1738 | /* copy all until spec */ | |
1739 | strncpy(scanf_fmt, rule, spec - rule); | |
1740 | scanf_fmt[spec - rule] = '\0'; | |
1741 | /* copy new spec */ | |
1742 | strcat(scanf_fmt, "%s"); | |
1743 | /* copy remaining rule */ | |
1744 | strcat(scanf_fmt, spec + 4); | |
1745 | ||
1746 | return; | |
1747 | } | |
1748 | ||
6e7b3309 | 1749 | char *shorten_unambiguous_ref(const char *ref, int strict) |
7c2b3029 JK |
1750 | { |
1751 | int i; | |
1752 | static char **scanf_fmts; | |
1753 | static int nr_rules; | |
1754 | char *short_name; | |
1755 | ||
1756 | /* pre generate scanf formats from ref_rev_parse_rules[] */ | |
1757 | if (!nr_rules) { | |
1758 | size_t total_len = 0; | |
1759 | ||
1760 | /* the rule list is NULL terminated, count them first */ | |
1761 | for (; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
1762 | /* no +1 because strlen("%s") < strlen("%.*s") */ | |
1763 | total_len += strlen(ref_rev_parse_rules[nr_rules]); | |
1764 | ||
1765 | scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); | |
1766 | ||
1767 | total_len = 0; | |
1768 | for (i = 0; i < nr_rules; i++) { | |
1769 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] | |
1770 | + total_len; | |
1771 | gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); | |
1772 | total_len += strlen(ref_rev_parse_rules[i]); | |
1773 | } | |
1774 | } | |
1775 | ||
1776 | /* bail out if there are no rules */ | |
1777 | if (!nr_rules) | |
1778 | return xstrdup(ref); | |
1779 | ||
1780 | /* buffer for scanf result, at most ref must fit */ | |
1781 | short_name = xstrdup(ref); | |
1782 | ||
1783 | /* skip first rule, it will always match */ | |
1784 | for (i = nr_rules - 1; i > 0 ; --i) { | |
1785 | int j; | |
6e7b3309 | 1786 | int rules_to_fail = i; |
7c2b3029 JK |
1787 | int short_name_len; |
1788 | ||
1789 | if (1 != sscanf(ref, scanf_fmts[i], short_name)) | |
1790 | continue; | |
1791 | ||
1792 | short_name_len = strlen(short_name); | |
1793 | ||
6e7b3309 BW |
1794 | /* |
1795 | * in strict mode, all (except the matched one) rules | |
1796 | * must fail to resolve to a valid non-ambiguous ref | |
1797 | */ | |
1798 | if (strict) | |
1799 | rules_to_fail = nr_rules; | |
1800 | ||
7c2b3029 JK |
1801 | /* |
1802 | * check if the short name resolves to a valid ref, | |
1803 | * but use only rules prior to the matched one | |
1804 | */ | |
6e7b3309 | 1805 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 JK |
1806 | const char *rule = ref_rev_parse_rules[j]; |
1807 | unsigned char short_objectname[20]; | |
1808 | char refname[PATH_MAX]; | |
1809 | ||
6e7b3309 BW |
1810 | /* skip matched rule */ |
1811 | if (i == j) | |
1812 | continue; | |
1813 | ||
7c2b3029 JK |
1814 | /* |
1815 | * the short name is ambiguous, if it resolves | |
1816 | * (with this previous rule) to a valid ref | |
1817 | * read_ref() returns 0 on success | |
1818 | */ | |
1819 | mksnpath(refname, sizeof(refname), | |
1820 | rule, short_name_len, short_name); | |
1821 | if (!read_ref(refname, short_objectname)) | |
1822 | break; | |
1823 | } | |
1824 | ||
1825 | /* | |
1826 | * short name is non-ambiguous if all previous rules | |
1827 | * haven't resolved to a valid ref | |
1828 | */ | |
6e7b3309 | 1829 | if (j == rules_to_fail) |
7c2b3029 JK |
1830 | return short_name; |
1831 | } | |
1832 | ||
1833 | free(short_name); | |
1834 | return xstrdup(ref); | |
1835 | } |