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Commit | Line | Data |
---|---|---|
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 | |
e9c4c111 | 11 | struct ref_entry { |
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 | ||
e9c4c111 JP |
18 | struct ref_array { |
19 | int nr, alloc; | |
20 | struct ref_entry **refs; | |
21 | }; | |
22 | ||
f4204ab9 | 23 | static const char *parse_ref_line(char *line, unsigned char *sha1) |
e1e22e37 LT |
24 | { |
25 | /* | |
26 | * 42: the answer to everything. | |
27 | * | |
28 | * In this case, it happens to be the answer to | |
29 | * 40 (length of sha1 hex representation) | |
30 | * +1 (space in between hex and name) | |
31 | * +1 (newline at the end of the line) | |
32 | */ | |
33 | int len = strlen(line) - 42; | |
34 | ||
35 | if (len <= 0) | |
36 | return NULL; | |
37 | if (get_sha1_hex(line, sha1) < 0) | |
38 | return NULL; | |
39 | if (!isspace(line[40])) | |
40 | return NULL; | |
41 | line += 41; | |
f4204ab9 JH |
42 | if (isspace(*line)) |
43 | return NULL; | |
e1e22e37 LT |
44 | if (line[len] != '\n') |
45 | return NULL; | |
46 | line[len] = 0; | |
cf0adba7 | 47 | |
e1e22e37 LT |
48 | return line; |
49 | } | |
50 | ||
e9c4c111 JP |
51 | static void add_ref(const char *name, const unsigned char *sha1, |
52 | int flag, struct ref_array *refs, | |
53 | struct ref_entry **new_entry) | |
e1e22e37 LT |
54 | { |
55 | int len; | |
e9c4c111 | 56 | struct ref_entry *entry; |
e1e22e37 LT |
57 | |
58 | /* Allocate it and add it in.. */ | |
59 | len = strlen(name) + 1; | |
e9c4c111 | 60 | entry = xmalloc(sizeof(struct ref_entry) + len); |
e1e22e37 | 61 | hashcpy(entry->sha1, sha1); |
f4204ab9 | 62 | hashclr(entry->peeled); |
dce4bab6 MH |
63 | if (check_refname_format(name, REFNAME_ALLOW_ONELEVEL|REFNAME_DOT_COMPONENT)) |
64 | die("Reference has invalid format: '%s'", name); | |
e1e22e37 | 65 | memcpy(entry->name, name, len); |
8da19775 | 66 | entry->flag = flag; |
f4204ab9 JH |
67 | if (new_entry) |
68 | *new_entry = entry; | |
e9c4c111 JP |
69 | ALLOC_GROW(refs->refs, refs->nr + 1, refs->alloc); |
70 | refs->refs[refs->nr++] = entry; | |
c774aab9 JP |
71 | } |
72 | ||
e9c4c111 | 73 | static int ref_entry_cmp(const void *a, const void *b) |
c774aab9 | 74 | { |
e9c4c111 JP |
75 | struct ref_entry *one = *(struct ref_entry **)a; |
76 | struct ref_entry *two = *(struct ref_entry **)b; | |
77 | return strcmp(one->name, two->name); | |
78 | } | |
c774aab9 | 79 | |
e9c4c111 JP |
80 | static void sort_ref_array(struct ref_array *array) |
81 | { | |
82 | int i = 0, j = 1; | |
c774aab9 | 83 | |
e9c4c111 JP |
84 | /* Nothing to sort unless there are at least two entries */ |
85 | if (array->nr < 2) | |
86 | return; | |
c774aab9 | 87 | |
e9c4c111 | 88 | qsort(array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp); |
c774aab9 | 89 | |
e9c4c111 JP |
90 | /* Remove any duplicates from the ref_array */ |
91 | for (; j < array->nr; j++) { | |
92 | struct ref_entry *a = array->refs[i]; | |
93 | struct ref_entry *b = array->refs[j]; | |
94 | if (!strcmp(a->name, b->name)) { | |
95 | if (hashcmp(a->sha1, b->sha1)) | |
96 | die("Duplicated ref, and SHA1s don't match: %s", | |
97 | a->name); | |
98 | warning("Duplicated ref: %s", a->name); | |
17d68a54 | 99 | free(b); |
e9c4c111 JP |
100 | continue; |
101 | } | |
102 | i++; | |
103 | array->refs[i] = array->refs[j]; | |
104 | } | |
105 | array->nr = i + 1; | |
106 | } | |
c774aab9 | 107 | |
e9c4c111 JP |
108 | static struct ref_entry *search_ref_array(struct ref_array *array, const char *name) |
109 | { | |
110 | struct ref_entry *e, **r; | |
111 | int len; | |
c774aab9 | 112 | |
e9c4c111 JP |
113 | if (name == NULL) |
114 | return NULL; | |
c774aab9 | 115 | |
68729696 BC |
116 | if (!array->nr) |
117 | return NULL; | |
c774aab9 | 118 | |
e9c4c111 JP |
119 | len = strlen(name) + 1; |
120 | e = xmalloc(sizeof(struct ref_entry) + len); | |
121 | memcpy(e->name, name, len); | |
c774aab9 | 122 | |
e9c4c111 | 123 | r = bsearch(&e, array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp); |
c774aab9 | 124 | |
e9c4c111 | 125 | free(e); |
c774aab9 | 126 | |
e9c4c111 JP |
127 | if (r == NULL) |
128 | return NULL; | |
c774aab9 | 129 | |
e9c4c111 | 130 | return *r; |
e1e22e37 LT |
131 | } |
132 | ||
5e290ff7 JH |
133 | /* |
134 | * Future: need to be in "struct repository" | |
135 | * when doing a full libification. | |
136 | */ | |
79c7ca54 MH |
137 | static struct ref_cache { |
138 | struct ref_cache *next; | |
5e290ff7 JH |
139 | char did_loose; |
140 | char did_packed; | |
e9c4c111 JP |
141 | struct ref_array loose; |
142 | struct ref_array packed; | |
ce40979c MH |
143 | /* The submodule name, or "" for the main repo. */ |
144 | char name[FLEX_ARRAY]; | |
79c7ca54 | 145 | } *ref_cache; |
0e88c130 | 146 | |
e9c4c111 | 147 | static struct ref_entry *current_ref; |
5e290ff7 | 148 | |
e9c4c111 | 149 | static struct ref_array extra_refs; |
e142a3c6 | 150 | |
e9c4c111 | 151 | static void free_ref_array(struct ref_array *array) |
5e290ff7 | 152 | { |
e9c4c111 JP |
153 | int i; |
154 | for (i = 0; i < array->nr; i++) | |
155 | free(array->refs[i]); | |
156 | free(array->refs); | |
157 | array->nr = array->alloc = 0; | |
158 | array->refs = NULL; | |
5e290ff7 JH |
159 | } |
160 | ||
1b7edaf9 | 161 | static void clear_ref_cache(struct ref_cache *refs) |
e1e22e37 | 162 | { |
1b7edaf9 MH |
163 | if (refs->did_loose) |
164 | free_ref_array(&refs->loose); | |
165 | if (refs->did_packed) | |
166 | free_ref_array(&refs->packed); | |
167 | refs->did_loose = refs->did_packed = 0; | |
5e290ff7 | 168 | } |
e1e22e37 | 169 | |
79c7ca54 | 170 | static struct ref_cache *create_ref_cache(const char *submodule) |
e5dbf605 | 171 | { |
ce40979c | 172 | int len; |
79c7ca54 | 173 | struct ref_cache *refs; |
ce40979c MH |
174 | if (!submodule) |
175 | submodule = ""; | |
176 | len = strlen(submodule) + 1; | |
79c7ca54 | 177 | refs = xcalloc(1, sizeof(struct ref_cache) + len); |
ce40979c | 178 | memcpy(refs->name, submodule, len); |
e5dbf605 MH |
179 | return refs; |
180 | } | |
181 | ||
4349a668 | 182 | /* |
79c7ca54 | 183 | * Return a pointer to a ref_cache for the specified submodule. For |
4349a668 MH |
184 | * the main repository, use submodule==NULL. The returned structure |
185 | * will be allocated and initialized but not necessarily populated; it | |
186 | * should not be freed. | |
187 | */ | |
79c7ca54 | 188 | static struct ref_cache *get_ref_cache(const char *submodule) |
4349a668 | 189 | { |
79c7ca54 | 190 | struct ref_cache *refs = ref_cache; |
0e88c130 MH |
191 | if (!submodule) |
192 | submodule = ""; | |
193 | while (refs) { | |
194 | if (!strcmp(submodule, refs->name)) | |
195 | return refs; | |
196 | refs = refs->next; | |
4349a668 | 197 | } |
0e88c130 | 198 | |
79c7ca54 MH |
199 | refs = create_ref_cache(submodule); |
200 | refs->next = ref_cache; | |
201 | ref_cache = refs; | |
0e88c130 | 202 | return refs; |
4349a668 MH |
203 | } |
204 | ||
8be8bde7 | 205 | void invalidate_ref_cache(const char *submodule) |
f130b116 | 206 | { |
3870a0d1 | 207 | clear_ref_cache(get_ref_cache(submodule)); |
5e290ff7 | 208 | } |
e1e22e37 | 209 | |
2c5c66be | 210 | static void read_packed_refs(FILE *f, struct ref_array *array) |
f4204ab9 | 211 | { |
e9c4c111 | 212 | struct ref_entry *last = NULL; |
f4204ab9 JH |
213 | char refline[PATH_MAX]; |
214 | int flag = REF_ISPACKED; | |
215 | ||
216 | while (fgets(refline, sizeof(refline), f)) { | |
217 | unsigned char sha1[20]; | |
218 | const char *name; | |
219 | static const char header[] = "# pack-refs with:"; | |
220 | ||
221 | if (!strncmp(refline, header, sizeof(header)-1)) { | |
222 | const char *traits = refline + sizeof(header) - 1; | |
223 | if (strstr(traits, " peeled ")) | |
224 | flag |= REF_KNOWS_PEELED; | |
225 | /* perhaps other traits later as well */ | |
226 | continue; | |
227 | } | |
228 | ||
229 | name = parse_ref_line(refline, sha1); | |
230 | if (name) { | |
2c5c66be | 231 | add_ref(name, sha1, flag, array, &last); |
f4204ab9 JH |
232 | continue; |
233 | } | |
234 | if (last && | |
235 | refline[0] == '^' && | |
236 | strlen(refline) == 42 && | |
237 | refline[41] == '\n' && | |
238 | !get_sha1_hex(refline + 1, sha1)) | |
239 | hashcpy(last->peeled, sha1); | |
240 | } | |
2c5c66be | 241 | sort_ref_array(array); |
f4204ab9 JH |
242 | } |
243 | ||
e142a3c6 DB |
244 | void add_extra_ref(const char *name, const unsigned char *sha1, int flag) |
245 | { | |
e9c4c111 | 246 | add_ref(name, sha1, flag, &extra_refs, NULL); |
e142a3c6 DB |
247 | } |
248 | ||
249 | void clear_extra_refs(void) | |
250 | { | |
e9c4c111 | 251 | free_ref_array(&extra_refs); |
e142a3c6 DB |
252 | } |
253 | ||
e9c4c111 | 254 | static struct ref_array *get_packed_refs(const char *submodule) |
5e290ff7 | 255 | { |
79c7ca54 | 256 | struct ref_cache *refs = get_ref_cache(submodule); |
0bad611b | 257 | |
4349a668 MH |
258 | if (!refs->did_packed) { |
259 | const char *packed_refs_file; | |
260 | FILE *f; | |
0bad611b | 261 | |
4349a668 MH |
262 | if (submodule) |
263 | packed_refs_file = git_path_submodule(submodule, "packed-refs"); | |
264 | else | |
265 | packed_refs_file = git_path("packed-refs"); | |
266 | f = fopen(packed_refs_file, "r"); | |
e1e22e37 | 267 | if (f) { |
2c5c66be | 268 | read_packed_refs(f, &refs->packed); |
e1e22e37 | 269 | fclose(f); |
e1e22e37 | 270 | } |
0bad611b | 271 | refs->did_packed = 1; |
e1e22e37 | 272 | } |
e9c4c111 | 273 | return &refs->packed; |
e1e22e37 LT |
274 | } |
275 | ||
e9c4c111 JP |
276 | static void get_ref_dir(const char *submodule, const char *base, |
277 | struct ref_array *array) | |
e1e22e37 | 278 | { |
0bad611b HV |
279 | DIR *dir; |
280 | const char *path; | |
281 | ||
282 | if (submodule) | |
283 | path = git_path_submodule(submodule, "%s", base); | |
284 | else | |
285 | path = git_path("%s", base); | |
286 | ||
287 | ||
288 | dir = opendir(path); | |
e1e22e37 LT |
289 | |
290 | if (dir) { | |
291 | struct dirent *de; | |
292 | int baselen = strlen(base); | |
ed378ec7 | 293 | char *ref = xmalloc(baselen + 257); |
e1e22e37 | 294 | |
ed378ec7 | 295 | memcpy(ref, base, baselen); |
e1e22e37 | 296 | if (baselen && base[baselen-1] != '/') |
ed378ec7 | 297 | ref[baselen++] = '/'; |
e1e22e37 LT |
298 | |
299 | while ((de = readdir(dir)) != NULL) { | |
300 | unsigned char sha1[20]; | |
301 | struct stat st; | |
8da19775 | 302 | int flag; |
e1e22e37 | 303 | int namelen; |
0bad611b | 304 | const char *refdir; |
e1e22e37 LT |
305 | |
306 | if (de->d_name[0] == '.') | |
307 | continue; | |
308 | namelen = strlen(de->d_name); | |
309 | if (namelen > 255) | |
310 | continue; | |
311 | if (has_extension(de->d_name, ".lock")) | |
312 | continue; | |
ed378ec7 | 313 | memcpy(ref + baselen, de->d_name, namelen+1); |
0bad611b HV |
314 | refdir = submodule |
315 | ? git_path_submodule(submodule, "%s", ref) | |
316 | : git_path("%s", ref); | |
317 | if (stat(refdir, &st) < 0) | |
e1e22e37 LT |
318 | continue; |
319 | if (S_ISDIR(st.st_mode)) { | |
e9c4c111 | 320 | get_ref_dir(submodule, ref, array); |
e1e22e37 LT |
321 | continue; |
322 | } | |
0bad611b | 323 | if (submodule) { |
f8948e2f | 324 | hashclr(sha1); |
0bad611b HV |
325 | flag = 0; |
326 | if (resolve_gitlink_ref(submodule, ref, sha1) < 0) { | |
327 | hashclr(sha1); | |
328 | flag |= REF_BROKEN; | |
329 | } | |
330 | } else | |
331 | if (!resolve_ref(ref, sha1, 1, &flag)) { | |
332 | hashclr(sha1); | |
333 | flag |= REF_BROKEN; | |
334 | } | |
e9c4c111 | 335 | add_ref(ref, sha1, flag, array, NULL); |
e1e22e37 | 336 | } |
ed378ec7 | 337 | free(ref); |
e1e22e37 LT |
338 | closedir(dir); |
339 | } | |
e1e22e37 LT |
340 | } |
341 | ||
f8948e2f | 342 | struct warn_if_dangling_data { |
3cf6134a | 343 | FILE *fp; |
f8948e2f JH |
344 | const char *refname; |
345 | const char *msg_fmt; | |
346 | }; | |
347 | ||
348 | static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1, | |
349 | int flags, void *cb_data) | |
350 | { | |
351 | struct warn_if_dangling_data *d = cb_data; | |
352 | const char *resolves_to; | |
353 | unsigned char junk[20]; | |
354 | ||
355 | if (!(flags & REF_ISSYMREF)) | |
356 | return 0; | |
357 | ||
358 | resolves_to = resolve_ref(refname, junk, 0, NULL); | |
359 | if (!resolves_to || strcmp(resolves_to, d->refname)) | |
360 | return 0; | |
361 | ||
3cf6134a | 362 | fprintf(d->fp, d->msg_fmt, refname); |
f8948e2f JH |
363 | return 0; |
364 | } | |
365 | ||
3cf6134a | 366 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f8948e2f | 367 | { |
66dbfd55 GV |
368 | struct warn_if_dangling_data data; |
369 | ||
370 | data.fp = fp; | |
371 | data.refname = refname; | |
372 | data.msg_fmt = msg_fmt; | |
f8948e2f JH |
373 | for_each_rawref(warn_if_dangling_symref, &data); |
374 | } | |
375 | ||
e9c4c111 | 376 | static struct ref_array *get_loose_refs(const char *submodule) |
e1e22e37 | 377 | { |
79c7ca54 | 378 | struct ref_cache *refs = get_ref_cache(submodule); |
0bad611b | 379 | |
4349a668 | 380 | if (!refs->did_loose) { |
2c5c66be JH |
381 | get_ref_dir(submodule, "refs", &refs->loose); |
382 | sort_ref_array(&refs->loose); | |
4349a668 | 383 | refs->did_loose = 1; |
e1e22e37 | 384 | } |
2c5c66be | 385 | return &refs->loose; |
e1e22e37 LT |
386 | } |
387 | ||
ca8db142 LT |
388 | /* We allow "recursive" symbolic refs. Only within reason, though */ |
389 | #define MAXDEPTH 5 | |
0ebde32c LT |
390 | #define MAXREFLEN (1024) |
391 | ||
392 | static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result) | |
393 | { | |
e9c4c111 | 394 | int retval = -1; |
2c5c66be JH |
395 | struct ref_entry *ref; |
396 | struct ref_array *array = get_packed_refs(name); | |
0ebde32c | 397 | |
2c5c66be | 398 | ref = search_ref_array(array, refname); |
e9c4c111 JP |
399 | if (ref != NULL) { |
400 | memcpy(result, ref->sha1, 20); | |
401 | retval = 0; | |
0ebde32c | 402 | } |
0ebde32c LT |
403 | return retval; |
404 | } | |
405 | ||
406 | static int resolve_gitlink_ref_recursive(char *name, int pathlen, const char *refname, unsigned char *result, int recursion) | |
407 | { | |
408 | int fd, len = strlen(refname); | |
409 | char buffer[128], *p; | |
410 | ||
411 | if (recursion > MAXDEPTH || len > MAXREFLEN) | |
412 | return -1; | |
413 | memcpy(name + pathlen, refname, len+1); | |
414 | fd = open(name, O_RDONLY); | |
415 | if (fd < 0) | |
416 | return resolve_gitlink_packed_ref(name, pathlen, refname, result); | |
417 | ||
418 | len = read(fd, buffer, sizeof(buffer)-1); | |
419 | close(fd); | |
420 | if (len < 0) | |
421 | return -1; | |
422 | while (len && isspace(buffer[len-1])) | |
423 | len--; | |
424 | buffer[len] = 0; | |
425 | ||
426 | /* Was it a detached head or an old-fashioned symlink? */ | |
427 | if (!get_sha1_hex(buffer, result)) | |
428 | return 0; | |
429 | ||
430 | /* Symref? */ | |
431 | if (strncmp(buffer, "ref:", 4)) | |
432 | return -1; | |
433 | p = buffer + 4; | |
434 | while (isspace(*p)) | |
435 | p++; | |
436 | ||
437 | return resolve_gitlink_ref_recursive(name, pathlen, p, result, recursion+1); | |
438 | } | |
439 | ||
440 | int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result) | |
441 | { | |
442 | int len = strlen(path), retval; | |
443 | char *gitdir; | |
842abf06 | 444 | const char *tmp; |
0ebde32c LT |
445 | |
446 | while (len && path[len-1] == '/') | |
447 | len--; | |
448 | if (!len) | |
449 | return -1; | |
450 | gitdir = xmalloc(len + MAXREFLEN + 8); | |
451 | memcpy(gitdir, path, len); | |
842abf06 LH |
452 | memcpy(gitdir + len, "/.git", 6); |
453 | len += 5; | |
454 | ||
13d6ec91 | 455 | tmp = read_gitfile(gitdir); |
842abf06 LH |
456 | if (tmp) { |
457 | free(gitdir); | |
458 | len = strlen(tmp); | |
459 | gitdir = xmalloc(len + MAXREFLEN + 3); | |
460 | memcpy(gitdir, tmp, len); | |
461 | } | |
462 | gitdir[len] = '/'; | |
463 | gitdir[++len] = '\0'; | |
464 | retval = resolve_gitlink_ref_recursive(gitdir, len, refname, result, 0); | |
0ebde32c LT |
465 | free(gitdir); |
466 | return retval; | |
467 | } | |
ca8db142 | 468 | |
4886b89f | 469 | /* |
c224ca7f MH |
470 | * Try to read ref from the packed references. On success, set sha1 |
471 | * and return 0; otherwise, return -1. | |
4886b89f | 472 | */ |
c224ca7f MH |
473 | static int get_packed_ref(const char *ref, unsigned char *sha1) |
474 | { | |
2c5c66be JH |
475 | struct ref_array *packed = get_packed_refs(NULL); |
476 | struct ref_entry *entry = search_ref_array(packed, ref); | |
477 | if (entry) { | |
478 | hashcpy(sha1, entry->sha1); | |
479 | return 0; | |
c224ca7f MH |
480 | } |
481 | return -1; | |
482 | } | |
483 | ||
8da19775 | 484 | const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag) |
8a65ff76 | 485 | { |
0104ca09 HO |
486 | int depth = MAXDEPTH; |
487 | ssize_t len; | |
a876ed83 | 488 | char buffer[256]; |
ed378ec7 | 489 | static char ref_buffer[256]; |
629cd3ac | 490 | char path[PATH_MAX]; |
ca8db142 | 491 | |
8da19775 JH |
492 | if (flag) |
493 | *flag = 0; | |
494 | ||
8384d788 MH |
495 | if (check_refname_format(ref, REFNAME_ALLOW_ONELEVEL)) |
496 | return NULL; | |
497 | ||
a876ed83 JH |
498 | for (;;) { |
499 | struct stat st; | |
500 | char *buf; | |
501 | int fd; | |
8a65ff76 | 502 | |
a876ed83 JH |
503 | if (--depth < 0) |
504 | return NULL; | |
ca8db142 | 505 | |
958a4789 | 506 | git_snpath(path, sizeof(path), "%s", ref); |
c224ca7f | 507 | |
a876ed83 | 508 | if (lstat(path, &st) < 0) { |
c224ca7f MH |
509 | if (errno != ENOENT) |
510 | return NULL; | |
511 | /* | |
512 | * The loose reference file does not exist; | |
513 | * check for a packed reference. | |
514 | */ | |
515 | if (!get_packed_ref(ref, sha1)) { | |
516 | if (flag) | |
517 | *flag |= REF_ISPACKED; | |
518 | return ref; | |
434cd0cd | 519 | } |
c224ca7f MH |
520 | /* The reference is not a packed reference, either. */ |
521 | if (reading) { | |
a876ed83 | 522 | return NULL; |
c224ca7f MH |
523 | } else { |
524 | hashclr(sha1); | |
525 | return ref; | |
526 | } | |
a876ed83 | 527 | } |
ca8db142 | 528 | |
a876ed83 JH |
529 | /* Follow "normalized" - ie "refs/.." symlinks by hand */ |
530 | if (S_ISLNK(st.st_mode)) { | |
531 | len = readlink(path, buffer, sizeof(buffer)-1); | |
7bb2bf8e MH |
532 | if (len < 0) |
533 | return NULL; | |
b54cb795 | 534 | buffer[len] = 0; |
1f58a038 MH |
535 | if (!prefixcmp(buffer, "refs/") && |
536 | !check_refname_format(buffer, 0)) { | |
ed378ec7 LT |
537 | strcpy(ref_buffer, buffer); |
538 | ref = ref_buffer; | |
8da19775 JH |
539 | if (flag) |
540 | *flag |= REF_ISSYMREF; | |
a876ed83 JH |
541 | continue; |
542 | } | |
ca8db142 | 543 | } |
a876ed83 | 544 | |
7a21632f DS |
545 | /* Is it a directory? */ |
546 | if (S_ISDIR(st.st_mode)) { | |
547 | errno = EISDIR; | |
548 | return NULL; | |
549 | } | |
550 | ||
a876ed83 JH |
551 | /* |
552 | * Anything else, just open it and try to use it as | |
553 | * a ref | |
554 | */ | |
555 | fd = open(path, O_RDONLY); | |
556 | if (fd < 0) | |
557 | return NULL; | |
93d26e4c | 558 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
a876ed83 | 559 | close(fd); |
28775050 MH |
560 | if (len < 0) |
561 | return NULL; | |
562 | while (len && isspace(buffer[len-1])) | |
563 | len--; | |
564 | buffer[len] = '\0'; | |
a876ed83 JH |
565 | |
566 | /* | |
567 | * Is it a symbolic ref? | |
568 | */ | |
28775050 | 569 | if (prefixcmp(buffer, "ref:")) |
a876ed83 JH |
570 | break; |
571 | buf = buffer + 4; | |
28775050 MH |
572 | while (isspace(*buf)) |
573 | buf++; | |
313fb010 MH |
574 | if (check_refname_format(buf, REFNAME_ALLOW_ONELEVEL)) { |
575 | warning("symbolic reference in %s is formatted incorrectly", | |
576 | path); | |
577 | return NULL; | |
578 | } | |
28775050 | 579 | ref = strcpy(ref_buffer, buf); |
8da19775 JH |
580 | if (flag) |
581 | *flag |= REF_ISSYMREF; | |
8a65ff76 | 582 | } |
f989fea0 MH |
583 | /* Please note that FETCH_HEAD has a second line containing other data. */ |
584 | if (get_sha1_hex(buffer, sha1) || (buffer[40] != '\0' && !isspace(buffer[40]))) { | |
629cd3ac | 585 | warning("reference in %s is formatted incorrectly", path); |
a876ed83 | 586 | return NULL; |
629cd3ac | 587 | } |
ed378ec7 | 588 | return ref; |
a876ed83 JH |
589 | } |
590 | ||
d08bae7e IL |
591 | /* The argument to filter_refs */ |
592 | struct ref_filter { | |
593 | const char *pattern; | |
594 | each_ref_fn *fn; | |
595 | void *cb_data; | |
596 | }; | |
597 | ||
ed378ec7 | 598 | int read_ref(const char *ref, unsigned char *sha1) |
a876ed83 | 599 | { |
8da19775 | 600 | if (resolve_ref(ref, sha1, 1, NULL)) |
a876ed83 JH |
601 | return 0; |
602 | return -1; | |
8a65ff76 LT |
603 | } |
604 | ||
f8948e2f | 605 | #define DO_FOR_EACH_INCLUDE_BROKEN 01 |
ef06b918 | 606 | static int do_one_ref(const char *base, each_ref_fn fn, int trim, |
e9c4c111 | 607 | int flags, void *cb_data, struct ref_entry *entry) |
ef06b918 | 608 | { |
b3cfc406 | 609 | if (prefixcmp(entry->name, base)) |
ef06b918 | 610 | return 0; |
e01de1c9 | 611 | |
f8948e2f | 612 | if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { |
e01de1c9 JH |
613 | if (entry->flag & REF_BROKEN) |
614 | return 0; /* ignore dangling symref */ | |
f8948e2f JH |
615 | if (!has_sha1_file(entry->sha1)) { |
616 | error("%s does not point to a valid object!", entry->name); | |
617 | return 0; | |
618 | } | |
ef06b918 | 619 | } |
0ae91be0 | 620 | current_ref = entry; |
ef06b918 JH |
621 | return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); |
622 | } | |
623 | ||
d08bae7e IL |
624 | static int filter_refs(const char *ref, const unsigned char *sha, int flags, |
625 | void *data) | |
626 | { | |
627 | struct ref_filter *filter = (struct ref_filter *)data; | |
628 | if (fnmatch(filter->pattern, ref, 0)) | |
629 | return 0; | |
630 | return filter->fn(ref, sha, flags, filter->cb_data); | |
631 | } | |
632 | ||
cf0adba7 JH |
633 | int peel_ref(const char *ref, unsigned char *sha1) |
634 | { | |
635 | int flag; | |
636 | unsigned char base[20]; | |
637 | struct object *o; | |
638 | ||
0ae91be0 SP |
639 | if (current_ref && (current_ref->name == ref |
640 | || !strcmp(current_ref->name, ref))) { | |
641 | if (current_ref->flag & REF_KNOWS_PEELED) { | |
642 | hashcpy(sha1, current_ref->peeled); | |
643 | return 0; | |
644 | } | |
645 | hashcpy(base, current_ref->sha1); | |
646 | goto fallback; | |
647 | } | |
648 | ||
cf0adba7 JH |
649 | if (!resolve_ref(ref, base, 1, &flag)) |
650 | return -1; | |
651 | ||
652 | if ((flag & REF_ISPACKED)) { | |
e9c4c111 JP |
653 | struct ref_array *array = get_packed_refs(NULL); |
654 | struct ref_entry *r = search_ref_array(array, ref); | |
cf0adba7 | 655 | |
e9c4c111 JP |
656 | if (r != NULL && r->flag & REF_KNOWS_PEELED) { |
657 | hashcpy(sha1, r->peeled); | |
658 | return 0; | |
cf0adba7 | 659 | } |
cf0adba7 JH |
660 | } |
661 | ||
0ae91be0 | 662 | fallback: |
cf0adba7 | 663 | o = parse_object(base); |
8c87dc77 | 664 | if (o && o->type == OBJ_TAG) { |
cf0adba7 JH |
665 | o = deref_tag(o, ref, 0); |
666 | if (o) { | |
667 | hashcpy(sha1, o->sha1); | |
668 | return 0; | |
669 | } | |
670 | } | |
671 | return -1; | |
672 | } | |
673 | ||
0bad611b HV |
674 | static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn, |
675 | int trim, int flags, void *cb_data) | |
8a65ff76 | 676 | { |
e9c4c111 JP |
677 | int retval = 0, i, p = 0, l = 0; |
678 | struct ref_array *packed = get_packed_refs(submodule); | |
679 | struct ref_array *loose = get_loose_refs(submodule); | |
8a65ff76 | 680 | |
e9c4c111 | 681 | struct ref_array *extra = &extra_refs; |
e142a3c6 | 682 | |
e9c4c111 JP |
683 | for (i = 0; i < extra->nr; i++) |
684 | retval = do_one_ref(base, fn, trim, flags, cb_data, extra->refs[i]); | |
e142a3c6 | 685 | |
e9c4c111 JP |
686 | while (p < packed->nr && l < loose->nr) { |
687 | struct ref_entry *entry; | |
688 | int cmp = strcmp(packed->refs[p]->name, loose->refs[l]->name); | |
e1e22e37 | 689 | if (!cmp) { |
e9c4c111 | 690 | p++; |
e1e22e37 | 691 | continue; |
6cada6a9 | 692 | } |
e1e22e37 | 693 | if (cmp > 0) { |
e9c4c111 | 694 | entry = loose->refs[l++]; |
e1e22e37 | 695 | } else { |
e9c4c111 | 696 | entry = packed->refs[p++]; |
e1e22e37 | 697 | } |
f8948e2f | 698 | retval = do_one_ref(base, fn, trim, flags, cb_data, entry); |
e1e22e37 | 699 | if (retval) |
0ae91be0 | 700 | goto end_each; |
e1e22e37 | 701 | } |
8a65ff76 | 702 | |
e9c4c111 JP |
703 | if (l < loose->nr) { |
704 | p = l; | |
705 | packed = loose; | |
706 | } | |
707 | ||
708 | for (; p < packed->nr; p++) { | |
709 | retval = do_one_ref(base, fn, trim, flags, cb_data, packed->refs[p]); | |
ef06b918 | 710 | if (retval) |
0ae91be0 | 711 | goto end_each; |
8a65ff76 | 712 | } |
0ae91be0 SP |
713 | |
714 | end_each: | |
715 | current_ref = NULL; | |
716 | return retval; | |
8a65ff76 LT |
717 | } |
718 | ||
0bad611b HV |
719 | |
720 | static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data) | |
723c31fe LT |
721 | { |
722 | unsigned char sha1[20]; | |
8da19775 JH |
723 | int flag; |
724 | ||
0bad611b HV |
725 | if (submodule) { |
726 | if (resolve_gitlink_ref(submodule, "HEAD", sha1) == 0) | |
727 | return fn("HEAD", sha1, 0, cb_data); | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
8da19775 JH |
732 | if (resolve_ref("HEAD", sha1, 1, &flag)) |
733 | return fn("HEAD", sha1, flag, cb_data); | |
0bad611b | 734 | |
2f34ba32 | 735 | return 0; |
723c31fe LT |
736 | } |
737 | ||
0bad611b HV |
738 | int head_ref(each_ref_fn fn, void *cb_data) |
739 | { | |
740 | return do_head_ref(NULL, fn, cb_data); | |
741 | } | |
742 | ||
9ef6aeb0 HV |
743 | int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
744 | { | |
745 | return do_head_ref(submodule, fn, cb_data); | |
746 | } | |
747 | ||
cb5d709f | 748 | int for_each_ref(each_ref_fn fn, void *cb_data) |
8a65ff76 | 749 | { |
b3cfc406 | 750 | return do_for_each_ref(NULL, "", fn, 0, 0, cb_data); |
a62be77f SE |
751 | } |
752 | ||
9ef6aeb0 HV |
753 | int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
754 | { | |
b3cfc406 | 755 | return do_for_each_ref(submodule, "", fn, 0, 0, cb_data); |
a62be77f SE |
756 | } |
757 | ||
2a8177b6 CC |
758 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) |
759 | { | |
0bad611b | 760 | return do_for_each_ref(NULL, prefix, fn, strlen(prefix), 0, cb_data); |
2a8177b6 CC |
761 | } |
762 | ||
9ef6aeb0 HV |
763 | int for_each_ref_in_submodule(const char *submodule, const char *prefix, |
764 | each_ref_fn fn, void *cb_data) | |
765 | { | |
766 | return do_for_each_ref(submodule, prefix, fn, strlen(prefix), 0, cb_data); | |
2a8177b6 CC |
767 | } |
768 | ||
cb5d709f | 769 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 770 | { |
2a8177b6 | 771 | return for_each_ref_in("refs/tags/", fn, cb_data); |
a62be77f SE |
772 | } |
773 | ||
9ef6aeb0 HV |
774 | int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
775 | { | |
776 | return for_each_ref_in_submodule(submodule, "refs/tags/", fn, cb_data); | |
777 | } | |
778 | ||
cb5d709f | 779 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 780 | { |
2a8177b6 | 781 | return for_each_ref_in("refs/heads/", fn, cb_data); |
a62be77f SE |
782 | } |
783 | ||
9ef6aeb0 HV |
784 | int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
785 | { | |
786 | return for_each_ref_in_submodule(submodule, "refs/heads/", fn, cb_data); | |
787 | } | |
788 | ||
cb5d709f | 789 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 790 | { |
2a8177b6 | 791 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
f8948e2f JH |
792 | } |
793 | ||
9ef6aeb0 HV |
794 | int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
795 | { | |
796 | return for_each_ref_in_submodule(submodule, "refs/remotes/", fn, cb_data); | |
797 | } | |
798 | ||
29268700 CC |
799 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) |
800 | { | |
0bad611b | 801 | return do_for_each_ref(NULL, "refs/replace/", fn, 13, 0, cb_data); |
29268700 CC |
802 | } |
803 | ||
a1bea2c1 JT |
804 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) |
805 | { | |
806 | struct strbuf buf = STRBUF_INIT; | |
807 | int ret = 0; | |
808 | unsigned char sha1[20]; | |
809 | int flag; | |
810 | ||
811 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); | |
812 | if (resolve_ref(buf.buf, sha1, 1, &flag)) | |
813 | ret = fn(buf.buf, sha1, flag, cb_data); | |
814 | strbuf_release(&buf); | |
815 | ||
816 | return ret; | |
817 | } | |
818 | ||
819 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
820 | { | |
821 | struct strbuf buf = STRBUF_INIT; | |
822 | int ret; | |
823 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
824 | ret = do_for_each_ref(NULL, buf.buf, fn, 0, 0, cb_data); | |
825 | strbuf_release(&buf); | |
826 | return ret; | |
827 | } | |
828 | ||
b09fe971 IL |
829 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
830 | const char *prefix, void *cb_data) | |
d08bae7e IL |
831 | { |
832 | struct strbuf real_pattern = STRBUF_INIT; | |
833 | struct ref_filter filter; | |
d08bae7e IL |
834 | int ret; |
835 | ||
b09fe971 | 836 | if (!prefix && prefixcmp(pattern, "refs/")) |
d08bae7e | 837 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
838 | else if (prefix) |
839 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
840 | strbuf_addstr(&real_pattern, pattern); |
841 | ||
894a9d33 | 842 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 843 | /* Append implied '/' '*' if not present. */ |
d08bae7e IL |
844 | if (real_pattern.buf[real_pattern.len - 1] != '/') |
845 | strbuf_addch(&real_pattern, '/'); | |
846 | /* No need to check for '*', there is none. */ | |
847 | strbuf_addch(&real_pattern, '*'); | |
848 | } | |
849 | ||
850 | filter.pattern = real_pattern.buf; | |
851 | filter.fn = fn; | |
852 | filter.cb_data = cb_data; | |
853 | ret = for_each_ref(filter_refs, &filter); | |
854 | ||
855 | strbuf_release(&real_pattern); | |
856 | return ret; | |
857 | } | |
858 | ||
b09fe971 IL |
859 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
860 | { | |
861 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
862 | } | |
863 | ||
f8948e2f JH |
864 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
865 | { | |
b3cfc406 | 866 | return do_for_each_ref(NULL, "", fn, 0, |
f8948e2f | 867 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); |
8a65ff76 LT |
868 | } |
869 | ||
03feddd6 JH |
870 | /* |
871 | * Make sure "ref" is something reasonable to have under ".git/refs/"; | |
872 | * We do not like it if: | |
873 | * | |
874 | * - any path component of it begins with ".", or | |
875 | * - it has double dots "..", or | |
876 | * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or | |
877 | * - it ends with a "/". | |
3e262b95 | 878 | * - it ends with ".lock" |
a4c2e699 | 879 | * - it contains a "\" (backslash) |
03feddd6 JH |
880 | */ |
881 | ||
9224b73b | 882 | /* Return true iff ch is not allowed in reference names. */ |
03feddd6 JH |
883 | static inline int bad_ref_char(int ch) |
884 | { | |
f3738c1c | 885 | if (((unsigned) ch) <= ' ' || ch == 0x7f || |
a4c2e699 | 886 | ch == '~' || ch == '^' || ch == ':' || ch == '\\') |
8558fd9e DB |
887 | return 1; |
888 | /* 2.13 Pattern Matching Notation */ | |
9224b73b | 889 | if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */ |
8558fd9e | 890 | return 1; |
8558fd9e | 891 | return 0; |
03feddd6 JH |
892 | } |
893 | ||
49295d4e MH |
894 | /* |
895 | * Try to read one refname component from the front of ref. Return | |
896 | * the length of the component found, or -1 if the component is not | |
897 | * legal. | |
898 | */ | |
dce4bab6 | 899 | static int check_refname_component(const char *ref, int flags) |
95fc7512 | 900 | { |
49295d4e MH |
901 | const char *cp; |
902 | char last = '\0'; | |
03feddd6 | 903 | |
49295d4e MH |
904 | for (cp = ref; ; cp++) { |
905 | char ch = *cp; | |
906 | if (ch == '\0' || ch == '/') | |
907 | break; | |
908 | if (bad_ref_char(ch)) | |
909 | return -1; /* Illegal character in refname. */ | |
910 | if (last == '.' && ch == '.') | |
911 | return -1; /* Refname contains "..". */ | |
912 | if (last == '@' && ch == '{') | |
913 | return -1; /* Refname contains "@{". */ | |
cbdffe40 | 914 | last = ch; |
49295d4e MH |
915 | } |
916 | if (cp == ref) | |
917 | return -1; /* Component has zero length. */ | |
dce4bab6 MH |
918 | if (ref[0] == '.') { |
919 | if (!(flags & REFNAME_DOT_COMPONENT)) | |
920 | return -1; /* Component starts with '.'. */ | |
921 | /* | |
922 | * Even if leading dots are allowed, don't allow "." | |
923 | * as a component (".." is prevented by a rule above). | |
924 | */ | |
925 | if (ref[1] == '\0') | |
926 | return -1; /* Component equals ".". */ | |
927 | } | |
7e9d2fe9 MH |
928 | if (cp - ref >= 5 && !memcmp(cp - 5, ".lock", 5)) |
929 | return -1; /* Refname ends with ".lock". */ | |
49295d4e MH |
930 | return cp - ref; |
931 | } | |
932 | ||
8d9c5010 | 933 | int check_refname_format(const char *ref, int flags) |
95fc7512 | 934 | { |
49295d4e | 935 | int component_len, component_count = 0; |
03feddd6 | 936 | |
03feddd6 | 937 | while (1) { |
49295d4e | 938 | /* We are at the start of a path component. */ |
dce4bab6 | 939 | component_len = check_refname_component(ref, flags); |
49295d4e MH |
940 | if (component_len < 0) { |
941 | if ((flags & REFNAME_REFSPEC_PATTERN) && | |
942 | ref[0] == '*' && | |
943 | (ref[1] == '\0' || ref[1] == '/')) { | |
8d9c5010 MH |
944 | /* Accept one wildcard as a full refname component. */ |
945 | flags &= ~REFNAME_REFSPEC_PATTERN; | |
49295d4e MH |
946 | component_len = 1; |
947 | } else { | |
8d9c5010 | 948 | return -1; |
49295d4e | 949 | } |
03feddd6 | 950 | } |
49295d4e MH |
951 | component_count++; |
952 | if (ref[component_len] == '\0') | |
953 | break; | |
954 | /* Skip to next component. */ | |
955 | ref += component_len + 1; | |
03feddd6 | 956 | } |
49295d4e MH |
957 | |
958 | if (ref[component_len - 1] == '.') | |
959 | return -1; /* Refname ends with '.'. */ | |
49295d4e MH |
960 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) |
961 | return -1; /* Refname has only one component. */ | |
962 | return 0; | |
95fc7512 DB |
963 | } |
964 | ||
4577e483 | 965 | const char *prettify_refname(const char *name) |
a9c37a72 | 966 | { |
a9c37a72 DB |
967 | return name + ( |
968 | !prefixcmp(name, "refs/heads/") ? 11 : | |
969 | !prefixcmp(name, "refs/tags/") ? 10 : | |
970 | !prefixcmp(name, "refs/remotes/") ? 13 : | |
971 | 0); | |
972 | } | |
973 | ||
79803322 SP |
974 | const char *ref_rev_parse_rules[] = { |
975 | "%.*s", | |
976 | "refs/%.*s", | |
977 | "refs/tags/%.*s", | |
978 | "refs/heads/%.*s", | |
979 | "refs/remotes/%.*s", | |
980 | "refs/remotes/%.*s/HEAD", | |
981 | NULL | |
982 | }; | |
983 | ||
605b4978 SP |
984 | const char *ref_fetch_rules[] = { |
985 | "%.*s", | |
986 | "refs/%.*s", | |
987 | "refs/heads/%.*s", | |
988 | NULL | |
989 | }; | |
990 | ||
79803322 SP |
991 | int refname_match(const char *abbrev_name, const char *full_name, const char **rules) |
992 | { | |
993 | const char **p; | |
994 | const int abbrev_name_len = strlen(abbrev_name); | |
995 | ||
996 | for (p = rules; *p; p++) { | |
997 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { | |
998 | return 1; | |
999 | } | |
1000 | } | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
e5f38ec3 | 1005 | static struct ref_lock *verify_lock(struct ref_lock *lock, |
4bd18c43 SP |
1006 | const unsigned char *old_sha1, int mustexist) |
1007 | { | |
8da19775 | 1008 | if (!resolve_ref(lock->ref_name, lock->old_sha1, mustexist, NULL)) { |
434cd0cd | 1009 | error("Can't verify ref %s", lock->ref_name); |
4bd18c43 SP |
1010 | unlock_ref(lock); |
1011 | return NULL; | |
1012 | } | |
a89fccd2 | 1013 | if (hashcmp(lock->old_sha1, old_sha1)) { |
434cd0cd | 1014 | error("Ref %s is at %s but expected %s", lock->ref_name, |
4bd18c43 SP |
1015 | sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1)); |
1016 | unlock_ref(lock); | |
1017 | return NULL; | |
1018 | } | |
1019 | return lock; | |
1020 | } | |
1021 | ||
7155b727 | 1022 | static int remove_empty_directories(const char *file) |
bc7127ef JH |
1023 | { |
1024 | /* we want to create a file but there is a directory there; | |
1025 | * if that is an empty directory (or a directory that contains | |
1026 | * only empty directories), remove them. | |
1027 | */ | |
7155b727 JS |
1028 | struct strbuf path; |
1029 | int result; | |
bc7127ef | 1030 | |
7155b727 JS |
1031 | strbuf_init(&path, 20); |
1032 | strbuf_addstr(&path, file); | |
1033 | ||
a0f4afbe | 1034 | result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY); |
7155b727 JS |
1035 | |
1036 | strbuf_release(&path); | |
1037 | ||
1038 | return result; | |
bc7127ef JH |
1039 | } |
1040 | ||
c976d415 | 1041 | static int is_refname_available(const char *ref, const char *oldref, |
e9c4c111 | 1042 | struct ref_array *array, int quiet) |
c976d415 | 1043 | { |
e9c4c111 JP |
1044 | int i, namlen = strlen(ref); /* e.g. 'foo/bar' */ |
1045 | for (i = 0; i < array->nr; i++ ) { | |
1046 | struct ref_entry *entry = array->refs[i]; | |
1047 | /* entry->name could be 'foo' or 'foo/bar/baz' */ | |
1048 | if (!oldref || strcmp(oldref, entry->name)) { | |
1049 | int len = strlen(entry->name); | |
c976d415 | 1050 | int cmplen = (namlen < len) ? namlen : len; |
e9c4c111 JP |
1051 | const char *lead = (namlen < len) ? entry->name : ref; |
1052 | if (!strncmp(ref, entry->name, cmplen) && | |
c976d415 LH |
1053 | lead[cmplen] == '/') { |
1054 | if (!quiet) | |
1055 | error("'%s' exists; cannot create '%s'", | |
e9c4c111 | 1056 | entry->name, ref); |
c976d415 LH |
1057 | return 0; |
1058 | } | |
1059 | } | |
c976d415 LH |
1060 | } |
1061 | return 1; | |
1062 | } | |
1063 | ||
68db31cc | 1064 | static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p) |
4bd18c43 | 1065 | { |
434cd0cd | 1066 | char *ref_file; |
ed378ec7 | 1067 | const char *orig_ref = ref; |
4bd18c43 | 1068 | struct ref_lock *lock; |
5cc3cef9 | 1069 | int last_errno = 0; |
acd3b9ec | 1070 | int type, lflags; |
4431fcc4 | 1071 | int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); |
5bdd8d4a | 1072 | int missing = 0; |
4bd18c43 SP |
1073 | |
1074 | lock = xcalloc(1, sizeof(struct ref_lock)); | |
1075 | lock->lock_fd = -1; | |
1076 | ||
68db31cc | 1077 | ref = resolve_ref(ref, lock->old_sha1, mustexist, &type); |
bc7127ef JH |
1078 | if (!ref && errno == EISDIR) { |
1079 | /* we are trying to lock foo but we used to | |
1080 | * have foo/bar which now does not exist; | |
1081 | * it is normal for the empty directory 'foo' | |
1082 | * to remain. | |
1083 | */ | |
1084 | ref_file = git_path("%s", orig_ref); | |
5cc3cef9 JH |
1085 | if (remove_empty_directories(ref_file)) { |
1086 | last_errno = errno; | |
1087 | error("there are still refs under '%s'", orig_ref); | |
1088 | goto error_return; | |
1089 | } | |
68db31cc | 1090 | ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, &type); |
bc7127ef | 1091 | } |
68db31cc SV |
1092 | if (type_p) |
1093 | *type_p = type; | |
ed378ec7 | 1094 | if (!ref) { |
5cc3cef9 | 1095 | last_errno = errno; |
818f477c | 1096 | error("unable to resolve reference %s: %s", |
ed378ec7 | 1097 | orig_ref, strerror(errno)); |
5cc3cef9 | 1098 | goto error_return; |
4bd18c43 | 1099 | } |
5bdd8d4a | 1100 | missing = is_null_sha1(lock->old_sha1); |
c976d415 LH |
1101 | /* When the ref did not exist and we are creating it, |
1102 | * make sure there is no existing ref that is packed | |
1103 | * whose name begins with our refname, nor a ref whose | |
1104 | * name is a proper prefix of our refname. | |
1105 | */ | |
5bdd8d4a | 1106 | if (missing && |
0bad611b | 1107 | !is_refname_available(ref, NULL, get_packed_refs(NULL), 0)) { |
f475e08e | 1108 | last_errno = ENOTDIR; |
c976d415 | 1109 | goto error_return; |
f475e08e | 1110 | } |
22a3844e | 1111 | |
c33d5174 | 1112 | lock->lk = xcalloc(1, sizeof(struct lock_file)); |
4bd18c43 | 1113 | |
acd3b9ec JH |
1114 | lflags = LOCK_DIE_ON_ERROR; |
1115 | if (flags & REF_NODEREF) { | |
68db31cc | 1116 | ref = orig_ref; |
acd3b9ec JH |
1117 | lflags |= LOCK_NODEREF; |
1118 | } | |
434cd0cd | 1119 | lock->ref_name = xstrdup(ref); |
1655707c | 1120 | lock->orig_ref_name = xstrdup(orig_ref); |
7c1a278d | 1121 | ref_file = git_path("%s", ref); |
5bdd8d4a | 1122 | if (missing) |
68db31cc SV |
1123 | lock->force_write = 1; |
1124 | if ((flags & REF_NODEREF) && (type & REF_ISSYMREF)) | |
1125 | lock->force_write = 1; | |
4bd18c43 | 1126 | |
5cc3cef9 JH |
1127 | if (safe_create_leading_directories(ref_file)) { |
1128 | last_errno = errno; | |
1129 | error("unable to create directory for %s", ref_file); | |
1130 | goto error_return; | |
1131 | } | |
4bd18c43 | 1132 | |
acd3b9ec | 1133 | lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags); |
4bd18c43 | 1134 | return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock; |
5cc3cef9 JH |
1135 | |
1136 | error_return: | |
1137 | unlock_ref(lock); | |
1138 | errno = last_errno; | |
1139 | return NULL; | |
4bd18c43 SP |
1140 | } |
1141 | ||
4431fcc4 | 1142 | struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1) |
95fc7512 | 1143 | { |
53cce84c | 1144 | char refpath[PATH_MAX]; |
8d9c5010 | 1145 | if (check_refname_format(ref, 0)) |
4bd18c43 | 1146 | return NULL; |
53cce84c | 1147 | strcpy(refpath, mkpath("refs/%s", ref)); |
68db31cc | 1148 | return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL); |
4bd18c43 SP |
1149 | } |
1150 | ||
68db31cc | 1151 | struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags) |
4bd18c43 | 1152 | { |
8d9c5010 | 1153 | if (check_refname_format(ref, REFNAME_ALLOW_ONELEVEL)) |
257f3020 | 1154 | return NULL; |
8d9c5010 | 1155 | return lock_ref_sha1_basic(ref, old_sha1, flags, NULL); |
c0277d15 JH |
1156 | } |
1157 | ||
26a063a1 JH |
1158 | static struct lock_file packlock; |
1159 | ||
c0277d15 JH |
1160 | static int repack_without_ref(const char *refname) |
1161 | { | |
e9c4c111 JP |
1162 | struct ref_array *packed; |
1163 | struct ref_entry *ref; | |
1164 | int fd, i; | |
c0277d15 | 1165 | |
e9c4c111 JP |
1166 | packed = get_packed_refs(NULL); |
1167 | ref = search_ref_array(packed, refname); | |
1168 | if (ref == NULL) | |
c0277d15 | 1169 | return 0; |
c0277d15 | 1170 | fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0); |
1b018fd9 MV |
1171 | if (fd < 0) { |
1172 | unable_to_lock_error(git_path("packed-refs"), errno); | |
c0277d15 | 1173 | return error("cannot delete '%s' from packed refs", refname); |
1b018fd9 | 1174 | } |
c0277d15 | 1175 | |
e9c4c111 | 1176 | for (i = 0; i < packed->nr; i++) { |
c0277d15 JH |
1177 | char line[PATH_MAX + 100]; |
1178 | int len; | |
1179 | ||
e9c4c111 JP |
1180 | ref = packed->refs[i]; |
1181 | ||
1182 | if (!strcmp(refname, ref->name)) | |
c0277d15 JH |
1183 | continue; |
1184 | len = snprintf(line, sizeof(line), "%s %s\n", | |
e9c4c111 | 1185 | sha1_to_hex(ref->sha1), ref->name); |
c0277d15 JH |
1186 | /* this should not happen but just being defensive */ |
1187 | if (len > sizeof(line)) | |
e9c4c111 | 1188 | die("too long a refname '%s'", ref->name); |
c0277d15 JH |
1189 | write_or_die(fd, line, len); |
1190 | } | |
1191 | return commit_lock_file(&packlock); | |
1192 | } | |
1193 | ||
eca35a25 | 1194 | int delete_ref(const char *refname, const unsigned char *sha1, int delopt) |
c0277d15 JH |
1195 | { |
1196 | struct ref_lock *lock; | |
eca35a25 | 1197 | int err, i = 0, ret = 0, flag = 0; |
c0277d15 | 1198 | |
68db31cc | 1199 | lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); |
c0277d15 JH |
1200 | if (!lock) |
1201 | return 1; | |
045a476f | 1202 | if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { |
c0277d15 | 1203 | /* loose */ |
eca35a25 MV |
1204 | const char *path; |
1205 | ||
1206 | if (!(delopt & REF_NODEREF)) { | |
1207 | i = strlen(lock->lk->filename) - 5; /* .lock */ | |
1208 | lock->lk->filename[i] = 0; | |
1209 | path = lock->lk->filename; | |
1210 | } else { | |
9db56f71 | 1211 | path = git_path("%s", refname); |
eca35a25 | 1212 | } |
691f1a28 AR |
1213 | err = unlink_or_warn(path); |
1214 | if (err && errno != ENOENT) | |
c0277d15 | 1215 | ret = 1; |
691f1a28 | 1216 | |
eca35a25 MV |
1217 | if (!(delopt & REF_NODEREF)) |
1218 | lock->lk->filename[i] = '.'; | |
c0277d15 JH |
1219 | } |
1220 | /* removing the loose one could have resurrected an earlier | |
1221 | * packed one. Also, if it was not loose we need to repack | |
1222 | * without it. | |
1223 | */ | |
1224 | ret |= repack_without_ref(refname); | |
1225 | ||
691f1a28 | 1226 | unlink_or_warn(git_path("logs/%s", lock->ref_name)); |
3870a0d1 | 1227 | invalidate_ref_cache(NULL); |
c0277d15 JH |
1228 | unlock_ref(lock); |
1229 | return ret; | |
4bd18c43 SP |
1230 | } |
1231 | ||
765c2258 PH |
1232 | /* |
1233 | * People using contrib's git-new-workdir have .git/logs/refs -> | |
1234 | * /some/other/path/.git/logs/refs, and that may live on another device. | |
1235 | * | |
1236 | * IOW, to avoid cross device rename errors, the temporary renamed log must | |
1237 | * live into logs/refs. | |
1238 | */ | |
1239 | #define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log" | |
1240 | ||
678d0f4c | 1241 | int rename_ref(const char *oldref, const char *newref, const char *logmsg) |
c976d415 LH |
1242 | { |
1243 | static const char renamed_ref[] = "RENAMED-REF"; | |
1244 | unsigned char sha1[20], orig_sha1[20]; | |
1245 | int flag = 0, logmoved = 0; | |
1246 | struct ref_lock *lock; | |
c976d415 | 1247 | struct stat loginfo; |
16c2bfbb | 1248 | int log = !lstat(git_path("logs/%s", oldref), &loginfo); |
eca35a25 | 1249 | const char *symref = NULL; |
c976d415 | 1250 | |
450d4c0f | 1251 | if (log && S_ISLNK(loginfo.st_mode)) |
c976d415 LH |
1252 | return error("reflog for %s is a symlink", oldref); |
1253 | ||
eca35a25 MV |
1254 | symref = resolve_ref(oldref, orig_sha1, 1, &flag); |
1255 | if (flag & REF_ISSYMREF) | |
fa58186c MV |
1256 | return error("refname %s is a symbolic ref, renaming it is not supported", |
1257 | oldref); | |
eca35a25 | 1258 | if (!symref) |
c976d415 LH |
1259 | return error("refname %s not found", oldref); |
1260 | ||
0bad611b | 1261 | if (!is_refname_available(newref, oldref, get_packed_refs(NULL), 0)) |
c976d415 LH |
1262 | return 1; |
1263 | ||
0bad611b | 1264 | if (!is_refname_available(newref, oldref, get_loose_refs(NULL), 0)) |
c976d415 LH |
1265 | return 1; |
1266 | ||
68db31cc | 1267 | lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL); |
c976d415 LH |
1268 | if (!lock) |
1269 | return error("unable to lock %s", renamed_ref); | |
1270 | lock->force_write = 1; | |
678d0f4c | 1271 | if (write_ref_sha1(lock, orig_sha1, logmsg)) |
c976d415 LH |
1272 | return error("unable to save current sha1 in %s", renamed_ref); |
1273 | ||
765c2258 PH |
1274 | if (log && rename(git_path("logs/%s", oldref), git_path(TMP_RENAMED_LOG))) |
1275 | return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s", | |
c976d415 LH |
1276 | oldref, strerror(errno)); |
1277 | ||
eca35a25 | 1278 | if (delete_ref(oldref, orig_sha1, REF_NODEREF)) { |
c976d415 LH |
1279 | error("unable to delete old %s", oldref); |
1280 | goto rollback; | |
1281 | } | |
1282 | ||
eca35a25 | 1283 | if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1, REF_NODEREF)) { |
c976d415 LH |
1284 | if (errno==EISDIR) { |
1285 | if (remove_empty_directories(git_path("%s", newref))) { | |
1286 | error("Directory not empty: %s", newref); | |
1287 | goto rollback; | |
1288 | } | |
1289 | } else { | |
1290 | error("unable to delete existing %s", newref); | |
1291 | goto rollback; | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | if (log && safe_create_leading_directories(git_path("logs/%s", newref))) { | |
1296 | error("unable to create directory for %s", newref); | |
1297 | goto rollback; | |
1298 | } | |
1299 | ||
1300 | retry: | |
765c2258 | 1301 | if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newref))) { |
d9e74d57 JR |
1302 | if (errno==EISDIR || errno==ENOTDIR) { |
1303 | /* | |
1304 | * rename(a, b) when b is an existing | |
1305 | * directory ought to result in ISDIR, but | |
1306 | * Solaris 5.8 gives ENOTDIR. Sheesh. | |
1307 | */ | |
c976d415 LH |
1308 | if (remove_empty_directories(git_path("logs/%s", newref))) { |
1309 | error("Directory not empty: logs/%s", newref); | |
1310 | goto rollback; | |
1311 | } | |
1312 | goto retry; | |
1313 | } else { | |
765c2258 | 1314 | error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s", |
c976d415 LH |
1315 | newref, strerror(errno)); |
1316 | goto rollback; | |
1317 | } | |
1318 | } | |
1319 | logmoved = log; | |
1320 | ||
68db31cc | 1321 | lock = lock_ref_sha1_basic(newref, NULL, 0, NULL); |
c976d415 LH |
1322 | if (!lock) { |
1323 | error("unable to lock %s for update", newref); | |
1324 | goto rollback; | |
1325 | } | |
c976d415 LH |
1326 | lock->force_write = 1; |
1327 | hashcpy(lock->old_sha1, orig_sha1); | |
678d0f4c | 1328 | if (write_ref_sha1(lock, orig_sha1, logmsg)) { |
c976d415 LH |
1329 | error("unable to write current sha1 into %s", newref); |
1330 | goto rollback; | |
1331 | } | |
1332 | ||
1333 | return 0; | |
1334 | ||
1335 | rollback: | |
68db31cc | 1336 | lock = lock_ref_sha1_basic(oldref, NULL, 0, NULL); |
c976d415 LH |
1337 | if (!lock) { |
1338 | error("unable to lock %s for rollback", oldref); | |
1339 | goto rollbacklog; | |
1340 | } | |
1341 | ||
1342 | lock->force_write = 1; | |
1343 | flag = log_all_ref_updates; | |
1344 | log_all_ref_updates = 0; | |
1345 | if (write_ref_sha1(lock, orig_sha1, NULL)) | |
1346 | error("unable to write current sha1 into %s", oldref); | |
1347 | log_all_ref_updates = flag; | |
1348 | ||
1349 | rollbacklog: | |
1350 | if (logmoved && rename(git_path("logs/%s", newref), git_path("logs/%s", oldref))) | |
1351 | error("unable to restore logfile %s from %s: %s", | |
1352 | oldref, newref, strerror(errno)); | |
1353 | if (!logmoved && log && | |
765c2258 PH |
1354 | rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldref))) |
1355 | error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s", | |
c976d415 LH |
1356 | oldref, strerror(errno)); |
1357 | ||
1358 | return 1; | |
1359 | } | |
1360 | ||
435fc852 | 1361 | int close_ref(struct ref_lock *lock) |
b531394d BC |
1362 | { |
1363 | if (close_lock_file(lock->lk)) | |
1364 | return -1; | |
1365 | lock->lock_fd = -1; | |
1366 | return 0; | |
1367 | } | |
1368 | ||
435fc852 | 1369 | int commit_ref(struct ref_lock *lock) |
b531394d BC |
1370 | { |
1371 | if (commit_lock_file(lock->lk)) | |
1372 | return -1; | |
1373 | lock->lock_fd = -1; | |
1374 | return 0; | |
1375 | } | |
1376 | ||
e5f38ec3 | 1377 | void unlock_ref(struct ref_lock *lock) |
4bd18c43 | 1378 | { |
4ed7cd3a BC |
1379 | /* Do not free lock->lk -- atexit() still looks at them */ |
1380 | if (lock->lk) | |
1381 | rollback_lock_file(lock->lk); | |
434cd0cd | 1382 | free(lock->ref_name); |
1655707c | 1383 | free(lock->orig_ref_name); |
4bd18c43 SP |
1384 | free(lock); |
1385 | } | |
1386 | ||
0ec29a47 JH |
1387 | /* |
1388 | * copy the reflog message msg to buf, which has been allocated sufficiently | |
1389 | * large, while cleaning up the whitespaces. Especially, convert LF to space, | |
1390 | * because reflog file is one line per entry. | |
1391 | */ | |
1392 | static int copy_msg(char *buf, const char *msg) | |
1393 | { | |
1394 | char *cp = buf; | |
1395 | char c; | |
1396 | int wasspace = 1; | |
1397 | ||
1398 | *cp++ = '\t'; | |
1399 | while ((c = *msg++)) { | |
1400 | if (wasspace && isspace(c)) | |
1401 | continue; | |
1402 | wasspace = isspace(c); | |
1403 | if (wasspace) | |
1404 | c = ' '; | |
1405 | *cp++ = c; | |
1406 | } | |
1407 | while (buf < cp && isspace(cp[-1])) | |
1408 | cp--; | |
1409 | *cp++ = '\n'; | |
1410 | return cp - buf; | |
1411 | } | |
1412 | ||
157aaea5 | 1413 | int log_ref_setup(const char *ref_name, char *logfile, int bufsize) |
6de08ae6 | 1414 | { |
859c3017 | 1415 | int logfd, oflags = O_APPEND | O_WRONLY; |
9a13f0b7 | 1416 | |
157aaea5 | 1417 | git_snpath(logfile, bufsize, "logs/%s", ref_name); |
4057deb5 | 1418 | if (log_all_ref_updates && |
cc44c765 JH |
1419 | (!prefixcmp(ref_name, "refs/heads/") || |
1420 | !prefixcmp(ref_name, "refs/remotes/") || | |
b2e256b0 | 1421 | !prefixcmp(ref_name, "refs/notes/") || |
bd104db1 | 1422 | !strcmp(ref_name, "HEAD"))) { |
157aaea5 | 1423 | if (safe_create_leading_directories(logfile) < 0) |
6de08ae6 | 1424 | return error("unable to create directory for %s", |
157aaea5 | 1425 | logfile); |
6de08ae6 SP |
1426 | oflags |= O_CREAT; |
1427 | } | |
1428 | ||
157aaea5 | 1429 | logfd = open(logfile, oflags, 0666); |
6de08ae6 | 1430 | if (logfd < 0) { |
1974bf62 | 1431 | if (!(oflags & O_CREAT) && errno == ENOENT) |
6de08ae6 | 1432 | return 0; |
3b463c3f JH |
1433 | |
1434 | if ((oflags & O_CREAT) && errno == EISDIR) { | |
157aaea5 | 1435 | if (remove_empty_directories(logfile)) { |
3b463c3f | 1436 | return error("There are still logs under '%s'", |
157aaea5 | 1437 | logfile); |
3b463c3f | 1438 | } |
157aaea5 | 1439 | logfd = open(logfile, oflags, 0666); |
3b463c3f JH |
1440 | } |
1441 | ||
1442 | if (logfd < 0) | |
1443 | return error("Unable to append to %s: %s", | |
157aaea5 | 1444 | logfile, strerror(errno)); |
6de08ae6 SP |
1445 | } |
1446 | ||
157aaea5 | 1447 | adjust_shared_perm(logfile); |
859c3017 EM |
1448 | close(logfd); |
1449 | return 0; | |
1450 | } | |
443b92b6 | 1451 | |
859c3017 EM |
1452 | static int log_ref_write(const char *ref_name, const unsigned char *old_sha1, |
1453 | const unsigned char *new_sha1, const char *msg) | |
1454 | { | |
1455 | int logfd, result, written, oflags = O_APPEND | O_WRONLY; | |
1456 | unsigned maxlen, len; | |
1457 | int msglen; | |
157aaea5 | 1458 | char log_file[PATH_MAX]; |
859c3017 EM |
1459 | char *logrec; |
1460 | const char *committer; | |
1461 | ||
1462 | if (log_all_ref_updates < 0) | |
1463 | log_all_ref_updates = !is_bare_repository(); | |
1464 | ||
157aaea5 | 1465 | result = log_ref_setup(ref_name, log_file, sizeof(log_file)); |
859c3017 EM |
1466 | if (result) |
1467 | return result; | |
1468 | ||
1469 | logfd = open(log_file, oflags); | |
1470 | if (logfd < 0) | |
1471 | return 0; | |
0ec29a47 | 1472 | msglen = msg ? strlen(msg) : 0; |
774751a8 | 1473 | committer = git_committer_info(0); |
8ac65937 JH |
1474 | maxlen = strlen(committer) + msglen + 100; |
1475 | logrec = xmalloc(maxlen); | |
1476 | len = sprintf(logrec, "%s %s %s\n", | |
9a13f0b7 NP |
1477 | sha1_to_hex(old_sha1), |
1478 | sha1_to_hex(new_sha1), | |
8ac65937 JH |
1479 | committer); |
1480 | if (msglen) | |
0ec29a47 | 1481 | len += copy_msg(logrec + len - 1, msg) - 1; |
93822c22 | 1482 | written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1; |
6de08ae6 | 1483 | free(logrec); |
91c8d590 | 1484 | if (close(logfd) != 0 || written != len) |
9a13f0b7 | 1485 | return error("Unable to append to %s", log_file); |
6de08ae6 SP |
1486 | return 0; |
1487 | } | |
1488 | ||
c3b0dec5 LT |
1489 | static int is_branch(const char *refname) |
1490 | { | |
1491 | return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"); | |
1492 | } | |
1493 | ||
4bd18c43 SP |
1494 | int write_ref_sha1(struct ref_lock *lock, |
1495 | const unsigned char *sha1, const char *logmsg) | |
1496 | { | |
1497 | static char term = '\n'; | |
c3b0dec5 | 1498 | struct object *o; |
4bd18c43 SP |
1499 | |
1500 | if (!lock) | |
95fc7512 | 1501 | return -1; |
a89fccd2 | 1502 | if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) { |
4bd18c43 SP |
1503 | unlock_ref(lock); |
1504 | return 0; | |
95fc7512 | 1505 | } |
c3b0dec5 LT |
1506 | o = parse_object(sha1); |
1507 | if (!o) { | |
7be8b3ba | 1508 | error("Trying to write ref %s with nonexistent object %s", |
c3b0dec5 LT |
1509 | lock->ref_name, sha1_to_hex(sha1)); |
1510 | unlock_ref(lock); | |
1511 | return -1; | |
1512 | } | |
1513 | if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) { | |
1514 | error("Trying to write non-commit object %s to branch %s", | |
1515 | sha1_to_hex(sha1), lock->ref_name); | |
1516 | unlock_ref(lock); | |
1517 | return -1; | |
1518 | } | |
93822c22 AW |
1519 | if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 || |
1520 | write_in_full(lock->lock_fd, &term, 1) != 1 | |
b531394d | 1521 | || close_ref(lock) < 0) { |
c33d5174 | 1522 | error("Couldn't write %s", lock->lk->filename); |
4bd18c43 SP |
1523 | unlock_ref(lock); |
1524 | return -1; | |
1525 | } | |
3870a0d1 | 1526 | invalidate_ref_cache(NULL); |
bd104db1 NP |
1527 | if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 || |
1528 | (strcmp(lock->ref_name, lock->orig_ref_name) && | |
1529 | log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) { | |
6de08ae6 SP |
1530 | unlock_ref(lock); |
1531 | return -1; | |
1532 | } | |
605fac8b NP |
1533 | if (strcmp(lock->orig_ref_name, "HEAD") != 0) { |
1534 | /* | |
1535 | * Special hack: If a branch is updated directly and HEAD | |
1536 | * points to it (may happen on the remote side of a push | |
1537 | * for example) then logically the HEAD reflog should be | |
1538 | * updated too. | |
1539 | * A generic solution implies reverse symref information, | |
1540 | * but finding all symrefs pointing to the given branch | |
1541 | * would be rather costly for this rare event (the direct | |
1542 | * update of a branch) to be worth it. So let's cheat and | |
1543 | * check with HEAD only which should cover 99% of all usage | |
1544 | * scenarios (even 100% of the default ones). | |
1545 | */ | |
1546 | unsigned char head_sha1[20]; | |
1547 | int head_flag; | |
1548 | const char *head_ref; | |
1549 | head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag); | |
1550 | if (head_ref && (head_flag & REF_ISSYMREF) && | |
1551 | !strcmp(head_ref, lock->ref_name)) | |
1552 | log_ref_write("HEAD", lock->old_sha1, sha1, logmsg); | |
1553 | } | |
b531394d | 1554 | if (commit_ref(lock)) { |
434cd0cd | 1555 | error("Couldn't set %s", lock->ref_name); |
4bd18c43 SP |
1556 | unlock_ref(lock); |
1557 | return -1; | |
1558 | } | |
4bd18c43 SP |
1559 | unlock_ref(lock); |
1560 | return 0; | |
95fc7512 | 1561 | } |
d556fae2 | 1562 | |
8b5157e4 NP |
1563 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1564 | const char *logmsg) | |
41b625b0 NP |
1565 | { |
1566 | const char *lockpath; | |
1567 | char ref[1000]; | |
1568 | int fd, len, written; | |
a4f34cbb | 1569 | char *git_HEAD = git_pathdup("%s", ref_target); |
8b5157e4 NP |
1570 | unsigned char old_sha1[20], new_sha1[20]; |
1571 | ||
1572 | if (logmsg && read_ref(ref_target, old_sha1)) | |
1573 | hashclr(old_sha1); | |
41b625b0 | 1574 | |
d48744d1 JH |
1575 | if (safe_create_leading_directories(git_HEAD) < 0) |
1576 | return error("unable to create directory for %s", git_HEAD); | |
1577 | ||
41b625b0 NP |
1578 | #ifndef NO_SYMLINK_HEAD |
1579 | if (prefer_symlink_refs) { | |
1580 | unlink(git_HEAD); | |
1581 | if (!symlink(refs_heads_master, git_HEAD)) | |
8b5157e4 | 1582 | goto done; |
41b625b0 NP |
1583 | fprintf(stderr, "no symlink - falling back to symbolic ref\n"); |
1584 | } | |
1585 | #endif | |
1586 | ||
1587 | len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master); | |
1588 | if (sizeof(ref) <= len) { | |
1589 | error("refname too long: %s", refs_heads_master); | |
47fc52e2 | 1590 | goto error_free_return; |
41b625b0 NP |
1591 | } |
1592 | lockpath = mkpath("%s.lock", git_HEAD); | |
1593 | fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1594 | if (fd < 0) { | |
1595 | error("Unable to open %s for writing", lockpath); | |
47fc52e2 | 1596 | goto error_free_return; |
41b625b0 NP |
1597 | } |
1598 | written = write_in_full(fd, ref, len); | |
91c8d590 | 1599 | if (close(fd) != 0 || written != len) { |
41b625b0 | 1600 | error("Unable to write to %s", lockpath); |
47fc52e2 | 1601 | goto error_unlink_return; |
41b625b0 NP |
1602 | } |
1603 | if (rename(lockpath, git_HEAD) < 0) { | |
41b625b0 | 1604 | error("Unable to create %s", git_HEAD); |
47fc52e2 | 1605 | goto error_unlink_return; |
41b625b0 NP |
1606 | } |
1607 | if (adjust_shared_perm(git_HEAD)) { | |
41b625b0 | 1608 | error("Unable to fix permissions on %s", lockpath); |
47fc52e2 | 1609 | error_unlink_return: |
691f1a28 | 1610 | unlink_or_warn(lockpath); |
47fc52e2 JH |
1611 | error_free_return: |
1612 | free(git_HEAD); | |
1613 | return -1; | |
41b625b0 | 1614 | } |
8b5157e4 | 1615 | |
ee96d11b | 1616 | #ifndef NO_SYMLINK_HEAD |
8b5157e4 | 1617 | done: |
ee96d11b | 1618 | #endif |
8b5157e4 NP |
1619 | if (logmsg && !read_ref(refs_heads_master, new_sha1)) |
1620 | log_ref_write(ref_target, old_sha1, new_sha1, logmsg); | |
1621 | ||
47fc52e2 | 1622 | free(git_HEAD); |
41b625b0 NP |
1623 | return 0; |
1624 | } | |
1625 | ||
16d7cc90 JH |
1626 | static char *ref_msg(const char *line, const char *endp) |
1627 | { | |
1628 | const char *ep; | |
16d7cc90 | 1629 | line += 82; |
182af834 PH |
1630 | ep = memchr(line, '\n', endp - line); |
1631 | if (!ep) | |
1632 | ep = endp; | |
1633 | return xmemdupz(line, ep - line); | |
16d7cc90 JH |
1634 | } |
1635 | ||
1636 | 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 | 1637 | { |
e5229042 | 1638 | const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec; |
d556fae2 | 1639 | char *tz_c; |
e29cb53a | 1640 | int logfd, tz, reccnt = 0; |
d556fae2 SP |
1641 | struct stat st; |
1642 | unsigned long date; | |
e5229042 | 1643 | unsigned char logged_sha1[20]; |
cb48cb58 | 1644 | void *log_mapped; |
dc49cd76 | 1645 | size_t mapsz; |
d556fae2 SP |
1646 | |
1647 | logfile = git_path("logs/%s", ref); | |
1648 | logfd = open(logfile, O_RDONLY, 0); | |
1649 | if (logfd < 0) | |
d824cbba | 1650 | die_errno("Unable to read log '%s'", logfile); |
d556fae2 SP |
1651 | fstat(logfd, &st); |
1652 | if (!st.st_size) | |
1653 | die("Log %s is empty.", logfile); | |
dc49cd76 SP |
1654 | mapsz = xsize_t(st.st_size); |
1655 | log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0); | |
cb48cb58 | 1656 | logdata = log_mapped; |
d556fae2 SP |
1657 | close(logfd); |
1658 | ||
e5229042 | 1659 | lastrec = NULL; |
d556fae2 SP |
1660 | rec = logend = logdata + st.st_size; |
1661 | while (logdata < rec) { | |
e29cb53a | 1662 | reccnt++; |
d556fae2 SP |
1663 | if (logdata < rec && *(rec-1) == '\n') |
1664 | rec--; | |
e5229042 SP |
1665 | lastgt = NULL; |
1666 | while (logdata < rec && *(rec-1) != '\n') { | |
d556fae2 | 1667 | rec--; |
e5229042 SP |
1668 | if (*rec == '>') |
1669 | lastgt = rec; | |
1670 | } | |
1671 | if (!lastgt) | |
d556fae2 | 1672 | die("Log %s is corrupt.", logfile); |
e5229042 | 1673 | date = strtoul(lastgt + 1, &tz_c, 10); |
ab2a1a32 | 1674 | if (date <= at_time || cnt == 0) { |
76a44c5c | 1675 | tz = strtoul(tz_c, NULL, 10); |
16d7cc90 JH |
1676 | if (msg) |
1677 | *msg = ref_msg(rec, logend); | |
1678 | if (cutoff_time) | |
1679 | *cutoff_time = date; | |
1680 | if (cutoff_tz) | |
1681 | *cutoff_tz = tz; | |
1682 | if (cutoff_cnt) | |
76a44c5c | 1683 | *cutoff_cnt = reccnt - 1; |
e5229042 SP |
1684 | if (lastrec) { |
1685 | if (get_sha1_hex(lastrec, logged_sha1)) | |
1686 | die("Log %s is corrupt.", logfile); | |
1687 | if (get_sha1_hex(rec + 41, sha1)) | |
1688 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1689 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1690 | warning("Log %s has gap after %s.", |
73013afd | 1691 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 | 1692 | } |
e5f38ec3 JH |
1693 | } |
1694 | else if (date == at_time) { | |
e5229042 SP |
1695 | if (get_sha1_hex(rec + 41, sha1)) |
1696 | die("Log %s is corrupt.", logfile); | |
e5f38ec3 JH |
1697 | } |
1698 | else { | |
e5229042 SP |
1699 | if (get_sha1_hex(rec + 41, logged_sha1)) |
1700 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1701 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1702 | warning("Log %s unexpectedly ended on %s.", |
73013afd | 1703 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 SP |
1704 | } |
1705 | } | |
dc49cd76 | 1706 | munmap(log_mapped, mapsz); |
d556fae2 SP |
1707 | return 0; |
1708 | } | |
e5229042 | 1709 | lastrec = rec; |
ab2a1a32 JH |
1710 | if (cnt > 0) |
1711 | cnt--; | |
d556fae2 SP |
1712 | } |
1713 | ||
e5229042 SP |
1714 | rec = logdata; |
1715 | while (rec < logend && *rec != '>' && *rec != '\n') | |
1716 | rec++; | |
1717 | if (rec == logend || *rec == '\n') | |
d556fae2 | 1718 | die("Log %s is corrupt.", logfile); |
e5229042 | 1719 | date = strtoul(rec + 1, &tz_c, 10); |
d556fae2 SP |
1720 | tz = strtoul(tz_c, NULL, 10); |
1721 | if (get_sha1_hex(logdata, sha1)) | |
1722 | die("Log %s is corrupt.", logfile); | |
d1a4489a JK |
1723 | if (is_null_sha1(sha1)) { |
1724 | if (get_sha1_hex(logdata + 41, sha1)) | |
1725 | die("Log %s is corrupt.", logfile); | |
1726 | } | |
16d7cc90 JH |
1727 | if (msg) |
1728 | *msg = ref_msg(logdata, logend); | |
dc49cd76 | 1729 | munmap(log_mapped, mapsz); |
16d7cc90 JH |
1730 | |
1731 | if (cutoff_time) | |
1732 | *cutoff_time = date; | |
1733 | if (cutoff_tz) | |
1734 | *cutoff_tz = tz; | |
1735 | if (cutoff_cnt) | |
1736 | *cutoff_cnt = reccnt; | |
1737 | return 1; | |
d556fae2 | 1738 | } |
2ff81662 | 1739 | |
101d15e0 | 1740 | int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, void *cb_data) |
2ff81662 JH |
1741 | { |
1742 | const char *logfile; | |
1743 | FILE *logfp; | |
8ca78803 | 1744 | struct strbuf sb = STRBUF_INIT; |
2266bf27 | 1745 | int ret = 0; |
2ff81662 JH |
1746 | |
1747 | logfile = git_path("logs/%s", ref); | |
1748 | logfp = fopen(logfile, "r"); | |
1749 | if (!logfp) | |
883d60fa | 1750 | return -1; |
101d15e0 JH |
1751 | |
1752 | if (ofs) { | |
1753 | struct stat statbuf; | |
1754 | if (fstat(fileno(logfp), &statbuf) || | |
1755 | statbuf.st_size < ofs || | |
1756 | fseek(logfp, -ofs, SEEK_END) || | |
8ca78803 | 1757 | strbuf_getwholeline(&sb, logfp, '\n')) { |
9d33f7c2 | 1758 | fclose(logfp); |
8ca78803 | 1759 | strbuf_release(&sb); |
101d15e0 | 1760 | return -1; |
9d33f7c2 | 1761 | } |
101d15e0 JH |
1762 | } |
1763 | ||
8ca78803 | 1764 | while (!strbuf_getwholeline(&sb, logfp, '\n')) { |
2ff81662 | 1765 | unsigned char osha1[20], nsha1[20]; |
883d60fa JS |
1766 | char *email_end, *message; |
1767 | unsigned long timestamp; | |
8ca78803 | 1768 | int tz; |
2ff81662 JH |
1769 | |
1770 | /* old SP new SP name <email> SP time TAB msg LF */ | |
8ca78803 RS |
1771 | if (sb.len < 83 || sb.buf[sb.len - 1] != '\n' || |
1772 | get_sha1_hex(sb.buf, osha1) || sb.buf[40] != ' ' || | |
1773 | get_sha1_hex(sb.buf + 41, nsha1) || sb.buf[81] != ' ' || | |
1774 | !(email_end = strchr(sb.buf + 82, '>')) || | |
883d60fa JS |
1775 | email_end[1] != ' ' || |
1776 | !(timestamp = strtoul(email_end + 2, &message, 10)) || | |
1777 | !message || message[0] != ' ' || | |
1778 | (message[1] != '+' && message[1] != '-') || | |
1779 | !isdigit(message[2]) || !isdigit(message[3]) || | |
b4dd4856 | 1780 | !isdigit(message[4]) || !isdigit(message[5])) |
2ff81662 | 1781 | continue; /* corrupt? */ |
883d60fa JS |
1782 | email_end[1] = '\0'; |
1783 | tz = strtol(message + 1, NULL, 10); | |
b4dd4856 JS |
1784 | if (message[6] != '\t') |
1785 | message += 6; | |
1786 | else | |
1787 | message += 7; | |
8ca78803 RS |
1788 | ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message, |
1789 | cb_data); | |
883d60fa | 1790 | if (ret) |
2266bf27 | 1791 | break; |
2ff81662 JH |
1792 | } |
1793 | fclose(logfp); | |
8ca78803 | 1794 | strbuf_release(&sb); |
2266bf27 | 1795 | return ret; |
2ff81662 | 1796 | } |
e29cb53a | 1797 | |
101d15e0 JH |
1798 | int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data) |
1799 | { | |
1800 | return for_each_recent_reflog_ent(ref, fn, 0, cb_data); | |
1801 | } | |
1802 | ||
eb8381c8 NP |
1803 | static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data) |
1804 | { | |
1805 | DIR *dir = opendir(git_path("logs/%s", base)); | |
fcee5a14 | 1806 | int retval = 0; |
eb8381c8 NP |
1807 | |
1808 | if (dir) { | |
1809 | struct dirent *de; | |
1810 | int baselen = strlen(base); | |
1811 | char *log = xmalloc(baselen + 257); | |
1812 | ||
1813 | memcpy(log, base, baselen); | |
1814 | if (baselen && base[baselen-1] != '/') | |
1815 | log[baselen++] = '/'; | |
1816 | ||
1817 | while ((de = readdir(dir)) != NULL) { | |
1818 | struct stat st; | |
1819 | int namelen; | |
1820 | ||
1821 | if (de->d_name[0] == '.') | |
1822 | continue; | |
1823 | namelen = strlen(de->d_name); | |
1824 | if (namelen > 255) | |
1825 | continue; | |
1826 | if (has_extension(de->d_name, ".lock")) | |
1827 | continue; | |
1828 | memcpy(log + baselen, de->d_name, namelen+1); | |
1829 | if (stat(git_path("logs/%s", log), &st) < 0) | |
1830 | continue; | |
1831 | if (S_ISDIR(st.st_mode)) { | |
1832 | retval = do_for_each_reflog(log, fn, cb_data); | |
1833 | } else { | |
1834 | unsigned char sha1[20]; | |
1835 | if (!resolve_ref(log, sha1, 0, NULL)) | |
1836 | retval = error("bad ref for %s", log); | |
1837 | else | |
1838 | retval = fn(log, sha1, 0, cb_data); | |
1839 | } | |
1840 | if (retval) | |
1841 | break; | |
1842 | } | |
1843 | free(log); | |
1844 | closedir(dir); | |
1845 | } | |
acb39f64 | 1846 | else if (*base) |
fcee5a14 | 1847 | return errno; |
eb8381c8 NP |
1848 | return retval; |
1849 | } | |
1850 | ||
1851 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
1852 | { | |
1853 | return do_for_each_reflog("", fn, cb_data); | |
1854 | } | |
3d9f037c CR |
1855 | |
1856 | int update_ref(const char *action, const char *refname, | |
1857 | const unsigned char *sha1, const unsigned char *oldval, | |
1858 | int flags, enum action_on_err onerr) | |
1859 | { | |
1860 | static struct ref_lock *lock; | |
1861 | lock = lock_any_ref_for_update(refname, oldval, flags); | |
1862 | if (!lock) { | |
1863 | const char *str = "Cannot lock the ref '%s'."; | |
1864 | switch (onerr) { | |
1865 | case MSG_ON_ERR: error(str, refname); break; | |
1866 | case DIE_ON_ERR: die(str, refname); break; | |
1867 | case QUIET_ON_ERR: break; | |
1868 | } | |
1869 | return 1; | |
1870 | } | |
1871 | if (write_ref_sha1(lock, sha1, action) < 0) { | |
1872 | const char *str = "Cannot update the ref '%s'."; | |
1873 | switch (onerr) { | |
1874 | case MSG_ON_ERR: error(str, refname); break; | |
1875 | case DIE_ON_ERR: die(str, refname); break; | |
1876 | case QUIET_ON_ERR: break; | |
1877 | } | |
1878 | return 1; | |
1879 | } | |
1880 | return 0; | |
1881 | } | |
cda69f48 | 1882 | |
2c5c66be | 1883 | int ref_exists(const char *refname) |
c17b2294 JH |
1884 | { |
1885 | unsigned char sha1[20]; | |
1886 | return !!resolve_ref(refname, sha1, 1, NULL); | |
1887 | } | |
1888 | ||
5483f799 | 1889 | struct ref *find_ref_by_name(const struct ref *list, const char *name) |
cda69f48 JK |
1890 | { |
1891 | for ( ; list; list = list->next) | |
1892 | if (!strcmp(list->name, name)) | |
5483f799 | 1893 | return (struct ref *)list; |
cda69f48 JK |
1894 | return NULL; |
1895 | } | |
7c2b3029 JK |
1896 | |
1897 | /* | |
1898 | * generate a format suitable for scanf from a ref_rev_parse_rules | |
1899 | * rule, that is replace the "%.*s" spec with a "%s" spec | |
1900 | */ | |
1901 | static void gen_scanf_fmt(char *scanf_fmt, const char *rule) | |
1902 | { | |
1903 | char *spec; | |
1904 | ||
1905 | spec = strstr(rule, "%.*s"); | |
1906 | if (!spec || strstr(spec + 4, "%.*s")) | |
1907 | die("invalid rule in ref_rev_parse_rules: %s", rule); | |
1908 | ||
1909 | /* copy all until spec */ | |
1910 | strncpy(scanf_fmt, rule, spec - rule); | |
1911 | scanf_fmt[spec - rule] = '\0'; | |
1912 | /* copy new spec */ | |
1913 | strcat(scanf_fmt, "%s"); | |
1914 | /* copy remaining rule */ | |
1915 | strcat(scanf_fmt, spec + 4); | |
1916 | ||
1917 | return; | |
1918 | } | |
1919 | ||
6e7b3309 | 1920 | char *shorten_unambiguous_ref(const char *ref, int strict) |
7c2b3029 JK |
1921 | { |
1922 | int i; | |
1923 | static char **scanf_fmts; | |
1924 | static int nr_rules; | |
1925 | char *short_name; | |
1926 | ||
1927 | /* pre generate scanf formats from ref_rev_parse_rules[] */ | |
1928 | if (!nr_rules) { | |
1929 | size_t total_len = 0; | |
1930 | ||
1931 | /* the rule list is NULL terminated, count them first */ | |
1932 | for (; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
1933 | /* no +1 because strlen("%s") < strlen("%.*s") */ | |
1934 | total_len += strlen(ref_rev_parse_rules[nr_rules]); | |
1935 | ||
1936 | scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); | |
1937 | ||
1938 | total_len = 0; | |
1939 | for (i = 0; i < nr_rules; i++) { | |
1940 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] | |
1941 | + total_len; | |
1942 | gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); | |
1943 | total_len += strlen(ref_rev_parse_rules[i]); | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | /* bail out if there are no rules */ | |
1948 | if (!nr_rules) | |
1949 | return xstrdup(ref); | |
1950 | ||
1951 | /* buffer for scanf result, at most ref must fit */ | |
1952 | short_name = xstrdup(ref); | |
1953 | ||
1954 | /* skip first rule, it will always match */ | |
1955 | for (i = nr_rules - 1; i > 0 ; --i) { | |
1956 | int j; | |
6e7b3309 | 1957 | int rules_to_fail = i; |
7c2b3029 JK |
1958 | int short_name_len; |
1959 | ||
1960 | if (1 != sscanf(ref, scanf_fmts[i], short_name)) | |
1961 | continue; | |
1962 | ||
1963 | short_name_len = strlen(short_name); | |
1964 | ||
6e7b3309 BW |
1965 | /* |
1966 | * in strict mode, all (except the matched one) rules | |
1967 | * must fail to resolve to a valid non-ambiguous ref | |
1968 | */ | |
1969 | if (strict) | |
1970 | rules_to_fail = nr_rules; | |
1971 | ||
7c2b3029 JK |
1972 | /* |
1973 | * check if the short name resolves to a valid ref, | |
1974 | * but use only rules prior to the matched one | |
1975 | */ | |
6e7b3309 | 1976 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 JK |
1977 | const char *rule = ref_rev_parse_rules[j]; |
1978 | unsigned char short_objectname[20]; | |
1979 | char refname[PATH_MAX]; | |
1980 | ||
6e7b3309 BW |
1981 | /* skip matched rule */ |
1982 | if (i == j) | |
1983 | continue; | |
1984 | ||
7c2b3029 JK |
1985 | /* |
1986 | * the short name is ambiguous, if it resolves | |
1987 | * (with this previous rule) to a valid ref | |
1988 | * read_ref() returns 0 on success | |
1989 | */ | |
1990 | mksnpath(refname, sizeof(refname), | |
1991 | rule, short_name_len, short_name); | |
1992 | if (!read_ref(refname, short_objectname)) | |
1993 | break; | |
1994 | } | |
1995 | ||
1996 | /* | |
1997 | * short name is non-ambiguous if all previous rules | |
1998 | * haven't resolved to a valid ref | |
1999 | */ | |
6e7b3309 | 2000 | if (j == rules_to_fail) |
7c2b3029 JK |
2001 | return short_name; |
2002 | } | |
2003 | ||
2004 | free(short_name); | |
2005 | return xstrdup(ref); | |
2006 | } |