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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 | |
98ac34b2 JH |
7 | /* ISSYMREF=0x01, ISPACKED=0x02 and ISBROKEN=0x04 are public interfaces */ |
8 | #define REF_KNOWS_PEELED 0x10 | |
f4204ab9 | 9 | |
e9c4c111 | 10 | struct ref_entry { |
f4204ab9 | 11 | unsigned char flag; /* ISSYMREF? ISPACKED? */ |
e1e22e37 | 12 | unsigned char sha1[20]; |
f4204ab9 | 13 | unsigned char peeled[20]; |
c49b039b | 14 | /* The full name of the reference (e.g., "refs/heads/master"): */ |
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 | ||
fbd09e41 MH |
23 | /* |
24 | * Parse one line from a packed-refs file. Write the SHA1 to sha1. | |
25 | * Return a pointer to the refname within the line (null-terminated), | |
26 | * or NULL if there was a problem. | |
27 | */ | |
f4204ab9 | 28 | static const char *parse_ref_line(char *line, unsigned char *sha1) |
e1e22e37 LT |
29 | { |
30 | /* | |
31 | * 42: the answer to everything. | |
32 | * | |
33 | * In this case, it happens to be the answer to | |
34 | * 40 (length of sha1 hex representation) | |
35 | * +1 (space in between hex and name) | |
36 | * +1 (newline at the end of the line) | |
37 | */ | |
38 | int len = strlen(line) - 42; | |
39 | ||
40 | if (len <= 0) | |
41 | return NULL; | |
42 | if (get_sha1_hex(line, sha1) < 0) | |
43 | return NULL; | |
44 | if (!isspace(line[40])) | |
45 | return NULL; | |
46 | line += 41; | |
f4204ab9 JH |
47 | if (isspace(*line)) |
48 | return NULL; | |
e1e22e37 LT |
49 | if (line[len] != '\n') |
50 | return NULL; | |
51 | line[len] = 0; | |
cf0adba7 | 52 | |
e1e22e37 LT |
53 | return line; |
54 | } | |
55 | ||
cddc4258 MH |
56 | static struct ref_entry *create_ref_entry(const char *refname, |
57 | const unsigned char *sha1, int flag, | |
58 | int check_name) | |
e1e22e37 LT |
59 | { |
60 | int len; | |
cddc4258 | 61 | struct ref_entry *ref; |
e1e22e37 | 62 | |
09116a1c | 63 | if (check_name && |
dfefa935 MH |
64 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL|REFNAME_DOT_COMPONENT)) |
65 | die("Reference has invalid format: '%s'", refname); | |
cddc4258 MH |
66 | len = strlen(refname) + 1; |
67 | ref = xmalloc(sizeof(struct ref_entry) + len); | |
68 | hashcpy(ref->sha1, sha1); | |
69 | hashclr(ref->peeled); | |
70 | memcpy(ref->name, refname, len); | |
71 | ref->flag = flag; | |
72 | return ref; | |
73 | } | |
74 | ||
75 | /* Add a ref_entry to the end of the ref_array (unsorted). */ | |
76 | static void add_ref(const char *refname, const unsigned char *sha1, | |
77 | int flag, int check_name, struct ref_array *refs, | |
78 | struct ref_entry **new_ref) | |
79 | { | |
80 | struct ref_entry *ref = create_ref_entry(refname, sha1, flag, check_name); | |
81 | if (new_ref) | |
82 | *new_ref = ref; | |
e9c4c111 | 83 | ALLOC_GROW(refs->refs, refs->nr + 1, refs->alloc); |
cddc4258 | 84 | refs->refs[refs->nr++] = ref; |
c774aab9 JP |
85 | } |
86 | ||
e9c4c111 | 87 | static int ref_entry_cmp(const void *a, const void *b) |
c774aab9 | 88 | { |
e9c4c111 JP |
89 | struct ref_entry *one = *(struct ref_entry **)a; |
90 | struct ref_entry *two = *(struct ref_entry **)b; | |
91 | return strcmp(one->name, two->name); | |
92 | } | |
c774aab9 | 93 | |
202a56a9 MH |
94 | /* |
95 | * Emit a warning and return true iff ref1 and ref2 have the same name | |
96 | * and the same sha1. Die if they have the same name but different | |
97 | * sha1s. | |
98 | */ | |
99 | static int is_dup_ref(const struct ref_entry *ref1, const struct ref_entry *ref2) | |
100 | { | |
101 | if (!strcmp(ref1->name, ref2->name)) { | |
102 | /* Duplicate name; make sure that the SHA1s match: */ | |
103 | if (hashcmp(ref1->sha1, ref2->sha1)) | |
104 | die("Duplicated ref, and SHA1s don't match: %s", | |
105 | ref1->name); | |
106 | warning("Duplicated ref: %s", ref1->name); | |
107 | return 1; | |
108 | } else { | |
109 | return 0; | |
110 | } | |
111 | } | |
112 | ||
e9c4c111 JP |
113 | static void sort_ref_array(struct ref_array *array) |
114 | { | |
202a56a9 | 115 | int i, j; |
c774aab9 | 116 | |
e9c4c111 JP |
117 | /* Nothing to sort unless there are at least two entries */ |
118 | if (array->nr < 2) | |
119 | return; | |
c774aab9 | 120 | |
e9c4c111 | 121 | qsort(array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp); |
c774aab9 | 122 | |
e9c4c111 | 123 | /* Remove any duplicates from the ref_array */ |
202a56a9 MH |
124 | i = 0; |
125 | for (j = 1; j < array->nr; j++) { | |
126 | if (is_dup_ref(array->refs[i], array->refs[j])) { | |
127 | free(array->refs[j]); | |
e9c4c111 JP |
128 | continue; |
129 | } | |
202a56a9 | 130 | array->refs[++i] = array->refs[j]; |
e9c4c111 JP |
131 | } |
132 | array->nr = i + 1; | |
133 | } | |
c774aab9 | 134 | |
dfefa935 | 135 | static struct ref_entry *search_ref_array(struct ref_array *array, const char *refname) |
e9c4c111 JP |
136 | { |
137 | struct ref_entry *e, **r; | |
138 | int len; | |
c774aab9 | 139 | |
dfefa935 | 140 | if (refname == NULL) |
e9c4c111 | 141 | return NULL; |
c774aab9 | 142 | |
68729696 BC |
143 | if (!array->nr) |
144 | return NULL; | |
c774aab9 | 145 | |
dfefa935 | 146 | len = strlen(refname) + 1; |
e9c4c111 | 147 | e = xmalloc(sizeof(struct ref_entry) + len); |
dfefa935 | 148 | memcpy(e->name, refname, len); |
c774aab9 | 149 | |
e9c4c111 | 150 | r = bsearch(&e, array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp); |
c774aab9 | 151 | |
e9c4c111 | 152 | free(e); |
c774aab9 | 153 | |
e9c4c111 JP |
154 | if (r == NULL) |
155 | return NULL; | |
c774aab9 | 156 | |
e9c4c111 | 157 | return *r; |
e1e22e37 LT |
158 | } |
159 | ||
5e290ff7 JH |
160 | /* |
161 | * Future: need to be in "struct repository" | |
162 | * when doing a full libification. | |
163 | */ | |
79c7ca54 MH |
164 | static struct ref_cache { |
165 | struct ref_cache *next; | |
5e290ff7 JH |
166 | char did_loose; |
167 | char did_packed; | |
e9c4c111 JP |
168 | struct ref_array loose; |
169 | struct ref_array packed; | |
ce40979c MH |
170 | /* The submodule name, or "" for the main repo. */ |
171 | char name[FLEX_ARRAY]; | |
79c7ca54 | 172 | } *ref_cache; |
0e88c130 | 173 | |
e9c4c111 | 174 | static struct ref_entry *current_ref; |
5e290ff7 | 175 | |
e9c4c111 | 176 | static struct ref_array extra_refs; |
e142a3c6 | 177 | |
7c59511e | 178 | static void clear_ref_array(struct ref_array *array) |
5e290ff7 | 179 | { |
e9c4c111 JP |
180 | int i; |
181 | for (i = 0; i < array->nr; i++) | |
182 | free(array->refs[i]); | |
183 | free(array->refs); | |
184 | array->nr = array->alloc = 0; | |
185 | array->refs = NULL; | |
5e290ff7 JH |
186 | } |
187 | ||
760c4512 | 188 | static void clear_packed_ref_cache(struct ref_cache *refs) |
e1e22e37 | 189 | { |
1b7edaf9 | 190 | if (refs->did_packed) |
7c59511e | 191 | clear_ref_array(&refs->packed); |
760c4512 | 192 | refs->did_packed = 0; |
5e290ff7 | 193 | } |
e1e22e37 | 194 | |
760c4512 MH |
195 | static void clear_loose_ref_cache(struct ref_cache *refs) |
196 | { | |
197 | if (refs->did_loose) | |
7c59511e | 198 | clear_ref_array(&refs->loose); |
760c4512 MH |
199 | refs->did_loose = 0; |
200 | } | |
201 | ||
79c7ca54 | 202 | static struct ref_cache *create_ref_cache(const char *submodule) |
e5dbf605 | 203 | { |
ce40979c | 204 | int len; |
79c7ca54 | 205 | struct ref_cache *refs; |
ce40979c MH |
206 | if (!submodule) |
207 | submodule = ""; | |
208 | len = strlen(submodule) + 1; | |
79c7ca54 | 209 | refs = xcalloc(1, sizeof(struct ref_cache) + len); |
ce40979c | 210 | memcpy(refs->name, submodule, len); |
e5dbf605 MH |
211 | return refs; |
212 | } | |
213 | ||
4349a668 | 214 | /* |
79c7ca54 | 215 | * Return a pointer to a ref_cache for the specified submodule. For |
4349a668 MH |
216 | * the main repository, use submodule==NULL. The returned structure |
217 | * will be allocated and initialized but not necessarily populated; it | |
218 | * should not be freed. | |
219 | */ | |
79c7ca54 | 220 | static struct ref_cache *get_ref_cache(const char *submodule) |
4349a668 | 221 | { |
79c7ca54 | 222 | struct ref_cache *refs = ref_cache; |
0e88c130 MH |
223 | if (!submodule) |
224 | submodule = ""; | |
225 | while (refs) { | |
226 | if (!strcmp(submodule, refs->name)) | |
227 | return refs; | |
228 | refs = refs->next; | |
4349a668 | 229 | } |
0e88c130 | 230 | |
79c7ca54 MH |
231 | refs = create_ref_cache(submodule); |
232 | refs->next = ref_cache; | |
233 | ref_cache = refs; | |
0e88c130 | 234 | return refs; |
4349a668 MH |
235 | } |
236 | ||
8be8bde7 | 237 | void invalidate_ref_cache(const char *submodule) |
f130b116 | 238 | { |
c5f29abd MH |
239 | struct ref_cache *refs = get_ref_cache(submodule); |
240 | clear_packed_ref_cache(refs); | |
241 | clear_loose_ref_cache(refs); | |
5e290ff7 | 242 | } |
e1e22e37 | 243 | |
2c5c66be | 244 | static void read_packed_refs(FILE *f, struct ref_array *array) |
f4204ab9 | 245 | { |
e9c4c111 | 246 | struct ref_entry *last = NULL; |
f4204ab9 JH |
247 | char refline[PATH_MAX]; |
248 | int flag = REF_ISPACKED; | |
249 | ||
250 | while (fgets(refline, sizeof(refline), f)) { | |
251 | unsigned char sha1[20]; | |
dfefa935 | 252 | const char *refname; |
f4204ab9 JH |
253 | static const char header[] = "# pack-refs with:"; |
254 | ||
255 | if (!strncmp(refline, header, sizeof(header)-1)) { | |
256 | const char *traits = refline + sizeof(header) - 1; | |
257 | if (strstr(traits, " peeled ")) | |
258 | flag |= REF_KNOWS_PEELED; | |
259 | /* perhaps other traits later as well */ | |
260 | continue; | |
261 | } | |
262 | ||
dfefa935 MH |
263 | refname = parse_ref_line(refline, sha1); |
264 | if (refname) { | |
265 | add_ref(refname, sha1, flag, 1, array, &last); | |
f4204ab9 JH |
266 | continue; |
267 | } | |
268 | if (last && | |
269 | refline[0] == '^' && | |
270 | strlen(refline) == 42 && | |
271 | refline[41] == '\n' && | |
272 | !get_sha1_hex(refline + 1, sha1)) | |
273 | hashcpy(last->peeled, sha1); | |
274 | } | |
2c5c66be | 275 | sort_ref_array(array); |
f4204ab9 JH |
276 | } |
277 | ||
dfefa935 | 278 | void add_extra_ref(const char *refname, const unsigned char *sha1, int flag) |
e142a3c6 | 279 | { |
dfefa935 | 280 | add_ref(refname, sha1, flag, 0, &extra_refs, NULL); |
e142a3c6 DB |
281 | } |
282 | ||
283 | void clear_extra_refs(void) | |
284 | { | |
7c59511e | 285 | clear_ref_array(&extra_refs); |
e142a3c6 DB |
286 | } |
287 | ||
316b097a | 288 | static struct ref_array *get_packed_refs(struct ref_cache *refs) |
5e290ff7 | 289 | { |
4349a668 MH |
290 | if (!refs->did_packed) { |
291 | const char *packed_refs_file; | |
292 | FILE *f; | |
0bad611b | 293 | |
316b097a MH |
294 | if (*refs->name) |
295 | packed_refs_file = git_path_submodule(refs->name, "packed-refs"); | |
4349a668 MH |
296 | else |
297 | packed_refs_file = git_path("packed-refs"); | |
298 | f = fopen(packed_refs_file, "r"); | |
e1e22e37 | 299 | if (f) { |
2c5c66be | 300 | read_packed_refs(f, &refs->packed); |
e1e22e37 | 301 | fclose(f); |
e1e22e37 | 302 | } |
0bad611b | 303 | refs->did_packed = 1; |
e1e22e37 | 304 | } |
e9c4c111 | 305 | return &refs->packed; |
e1e22e37 LT |
306 | } |
307 | ||
3b124823 | 308 | static void get_ref_dir(struct ref_cache *refs, const char *base, |
e9c4c111 | 309 | struct ref_array *array) |
e1e22e37 | 310 | { |
0bad611b HV |
311 | DIR *dir; |
312 | const char *path; | |
313 | ||
3b124823 MH |
314 | if (*refs->name) |
315 | path = git_path_submodule(refs->name, "%s", base); | |
0bad611b HV |
316 | else |
317 | path = git_path("%s", base); | |
318 | ||
319 | ||
320 | dir = opendir(path); | |
e1e22e37 LT |
321 | |
322 | if (dir) { | |
323 | struct dirent *de; | |
324 | int baselen = strlen(base); | |
dfefa935 | 325 | char *refname = xmalloc(baselen + 257); |
e1e22e37 | 326 | |
dfefa935 | 327 | memcpy(refname, base, baselen); |
e1e22e37 | 328 | if (baselen && base[baselen-1] != '/') |
dfefa935 | 329 | refname[baselen++] = '/'; |
e1e22e37 LT |
330 | |
331 | while ((de = readdir(dir)) != NULL) { | |
332 | unsigned char sha1[20]; | |
333 | struct stat st; | |
8da19775 | 334 | int flag; |
e1e22e37 | 335 | int namelen; |
0bad611b | 336 | const char *refdir; |
e1e22e37 LT |
337 | |
338 | if (de->d_name[0] == '.') | |
339 | continue; | |
340 | namelen = strlen(de->d_name); | |
341 | if (namelen > 255) | |
342 | continue; | |
343 | if (has_extension(de->d_name, ".lock")) | |
344 | continue; | |
dfefa935 | 345 | memcpy(refname + baselen, de->d_name, namelen+1); |
3b124823 MH |
346 | refdir = *refs->name |
347 | ? git_path_submodule(refs->name, "%s", refname) | |
dfefa935 | 348 | : git_path("%s", refname); |
0bad611b | 349 | if (stat(refdir, &st) < 0) |
e1e22e37 LT |
350 | continue; |
351 | if (S_ISDIR(st.st_mode)) { | |
3b124823 | 352 | get_ref_dir(refs, refname, array); |
e1e22e37 LT |
353 | continue; |
354 | } | |
3b124823 | 355 | if (*refs->name) { |
f8948e2f | 356 | hashclr(sha1); |
0bad611b | 357 | flag = 0; |
3b124823 | 358 | if (resolve_gitlink_ref(refs->name, refname, sha1) < 0) { |
0bad611b | 359 | hashclr(sha1); |
98ac34b2 | 360 | flag |= REF_ISBROKEN; |
0bad611b | 361 | } |
dfefa935 | 362 | } else if (read_ref_full(refname, sha1, 1, &flag)) { |
09116a1c JH |
363 | hashclr(sha1); |
364 | flag |= REF_ISBROKEN; | |
365 | } | |
dfefa935 | 366 | add_ref(refname, sha1, flag, 1, array, NULL); |
e1e22e37 | 367 | } |
dfefa935 | 368 | free(refname); |
e1e22e37 LT |
369 | closedir(dir); |
370 | } | |
e1e22e37 LT |
371 | } |
372 | ||
f8948e2f | 373 | struct warn_if_dangling_data { |
3cf6134a | 374 | FILE *fp; |
f8948e2f JH |
375 | const char *refname; |
376 | const char *msg_fmt; | |
377 | }; | |
378 | ||
379 | static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1, | |
380 | int flags, void *cb_data) | |
381 | { | |
382 | struct warn_if_dangling_data *d = cb_data; | |
383 | const char *resolves_to; | |
384 | unsigned char junk[20]; | |
385 | ||
386 | if (!(flags & REF_ISSYMREF)) | |
387 | return 0; | |
388 | ||
389 | resolves_to = resolve_ref(refname, junk, 0, NULL); | |
390 | if (!resolves_to || strcmp(resolves_to, d->refname)) | |
391 | return 0; | |
392 | ||
3cf6134a | 393 | fprintf(d->fp, d->msg_fmt, refname); |
f8948e2f JH |
394 | return 0; |
395 | } | |
396 | ||
3cf6134a | 397 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f8948e2f | 398 | { |
66dbfd55 GV |
399 | struct warn_if_dangling_data data; |
400 | ||
401 | data.fp = fp; | |
402 | data.refname = refname; | |
403 | data.msg_fmt = msg_fmt; | |
f8948e2f JH |
404 | for_each_rawref(warn_if_dangling_symref, &data); |
405 | } | |
406 | ||
316b097a | 407 | static struct ref_array *get_loose_refs(struct ref_cache *refs) |
e1e22e37 | 408 | { |
4349a668 | 409 | if (!refs->did_loose) { |
3b124823 | 410 | get_ref_dir(refs, "refs", &refs->loose); |
2c5c66be | 411 | sort_ref_array(&refs->loose); |
4349a668 | 412 | refs->did_loose = 1; |
e1e22e37 | 413 | } |
2c5c66be | 414 | return &refs->loose; |
e1e22e37 LT |
415 | } |
416 | ||
ca8db142 LT |
417 | /* We allow "recursive" symbolic refs. Only within reason, though */ |
418 | #define MAXDEPTH 5 | |
0ebde32c LT |
419 | #define MAXREFLEN (1024) |
420 | ||
e5fa45c1 JH |
421 | /* |
422 | * Called by resolve_gitlink_ref_recursive() after it failed to read | |
b0626608 MH |
423 | * from the loose refs in ref_cache refs. Find <refname> in the |
424 | * packed-refs file for the submodule. | |
e5fa45c1 | 425 | */ |
b0626608 | 426 | static int resolve_gitlink_packed_ref(struct ref_cache *refs, |
85be1fe3 | 427 | const char *refname, unsigned char *sha1) |
0ebde32c | 428 | { |
2c5c66be | 429 | struct ref_entry *ref; |
b0626608 | 430 | struct ref_array *array = get_packed_refs(refs); |
0ebde32c | 431 | |
2c5c66be | 432 | ref = search_ref_array(array, refname); |
b0626608 MH |
433 | if (ref == NULL) |
434 | return -1; | |
435 | ||
436 | memcpy(sha1, ref->sha1, 20); | |
437 | return 0; | |
0ebde32c LT |
438 | } |
439 | ||
b0626608 | 440 | static int resolve_gitlink_ref_recursive(struct ref_cache *refs, |
85be1fe3 | 441 | const char *refname, unsigned char *sha1, |
dfefa935 | 442 | int recursion) |
0ebde32c | 443 | { |
064d51dc | 444 | int fd, len; |
0ebde32c | 445 | char buffer[128], *p; |
064d51dc | 446 | char *path; |
0ebde32c | 447 | |
064d51dc | 448 | if (recursion > MAXDEPTH || strlen(refname) > MAXREFLEN) |
0ebde32c | 449 | return -1; |
064d51dc MH |
450 | path = *refs->name |
451 | ? git_path_submodule(refs->name, "%s", refname) | |
452 | : git_path("%s", refname); | |
453 | fd = open(path, O_RDONLY); | |
0ebde32c | 454 | if (fd < 0) |
b0626608 | 455 | return resolve_gitlink_packed_ref(refs, refname, sha1); |
0ebde32c LT |
456 | |
457 | len = read(fd, buffer, sizeof(buffer)-1); | |
458 | close(fd); | |
459 | if (len < 0) | |
460 | return -1; | |
461 | while (len && isspace(buffer[len-1])) | |
462 | len--; | |
463 | buffer[len] = 0; | |
464 | ||
465 | /* Was it a detached head or an old-fashioned symlink? */ | |
85be1fe3 | 466 | if (!get_sha1_hex(buffer, sha1)) |
0ebde32c LT |
467 | return 0; |
468 | ||
469 | /* Symref? */ | |
470 | if (strncmp(buffer, "ref:", 4)) | |
471 | return -1; | |
472 | p = buffer + 4; | |
473 | while (isspace(*p)) | |
474 | p++; | |
475 | ||
064d51dc | 476 | return resolve_gitlink_ref_recursive(refs, p, sha1, recursion+1); |
0ebde32c LT |
477 | } |
478 | ||
85be1fe3 | 479 | int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1) |
0ebde32c LT |
480 | { |
481 | int len = strlen(path), retval; | |
064d51dc | 482 | char *submodule; |
b0626608 | 483 | struct ref_cache *refs; |
0ebde32c LT |
484 | |
485 | while (len && path[len-1] == '/') | |
486 | len--; | |
487 | if (!len) | |
488 | return -1; | |
b0626608 MH |
489 | submodule = xstrndup(path, len); |
490 | refs = get_ref_cache(submodule); | |
491 | free(submodule); | |
492 | ||
064d51dc | 493 | retval = resolve_gitlink_ref_recursive(refs, refname, sha1, 0); |
0ebde32c LT |
494 | return retval; |
495 | } | |
ca8db142 | 496 | |
4886b89f | 497 | /* |
c224ca7f MH |
498 | * Try to read ref from the packed references. On success, set sha1 |
499 | * and return 0; otherwise, return -1. | |
4886b89f | 500 | */ |
dfefa935 | 501 | static int get_packed_ref(const char *refname, unsigned char *sha1) |
c224ca7f | 502 | { |
316b097a | 503 | struct ref_array *packed = get_packed_refs(get_ref_cache(NULL)); |
dfefa935 | 504 | struct ref_entry *entry = search_ref_array(packed, refname); |
2c5c66be JH |
505 | if (entry) { |
506 | hashcpy(sha1, entry->sha1); | |
507 | return 0; | |
c224ca7f MH |
508 | } |
509 | return -1; | |
510 | } | |
511 | ||
dfefa935 | 512 | const char *resolve_ref(const char *refname, unsigned char *sha1, int reading, int *flag) |
8a65ff76 | 513 | { |
0104ca09 HO |
514 | int depth = MAXDEPTH; |
515 | ssize_t len; | |
a876ed83 | 516 | char buffer[256]; |
dfefa935 | 517 | static char refname_buffer[256]; |
ca8db142 | 518 | |
8da19775 JH |
519 | if (flag) |
520 | *flag = 0; | |
521 | ||
dfefa935 | 522 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) |
8384d788 MH |
523 | return NULL; |
524 | ||
a876ed83 | 525 | for (;;) { |
55956350 | 526 | char path[PATH_MAX]; |
a876ed83 JH |
527 | struct stat st; |
528 | char *buf; | |
529 | int fd; | |
8a65ff76 | 530 | |
a876ed83 JH |
531 | if (--depth < 0) |
532 | return NULL; | |
ca8db142 | 533 | |
dfefa935 | 534 | git_snpath(path, sizeof(path), "%s", refname); |
c224ca7f | 535 | |
a876ed83 | 536 | if (lstat(path, &st) < 0) { |
c224ca7f MH |
537 | if (errno != ENOENT) |
538 | return NULL; | |
539 | /* | |
540 | * The loose reference file does not exist; | |
541 | * check for a packed reference. | |
542 | */ | |
dfefa935 | 543 | if (!get_packed_ref(refname, sha1)) { |
c224ca7f MH |
544 | if (flag) |
545 | *flag |= REF_ISPACKED; | |
dfefa935 | 546 | return refname; |
434cd0cd | 547 | } |
c224ca7f MH |
548 | /* The reference is not a packed reference, either. */ |
549 | if (reading) { | |
a876ed83 | 550 | return NULL; |
c224ca7f MH |
551 | } else { |
552 | hashclr(sha1); | |
dfefa935 | 553 | return refname; |
c224ca7f | 554 | } |
a876ed83 | 555 | } |
ca8db142 | 556 | |
a876ed83 JH |
557 | /* Follow "normalized" - ie "refs/.." symlinks by hand */ |
558 | if (S_ISLNK(st.st_mode)) { | |
559 | len = readlink(path, buffer, sizeof(buffer)-1); | |
7bb2bf8e MH |
560 | if (len < 0) |
561 | return NULL; | |
b54cb795 | 562 | buffer[len] = 0; |
1f58a038 MH |
563 | if (!prefixcmp(buffer, "refs/") && |
564 | !check_refname_format(buffer, 0)) { | |
dfefa935 MH |
565 | strcpy(refname_buffer, buffer); |
566 | refname = refname_buffer; | |
8da19775 JH |
567 | if (flag) |
568 | *flag |= REF_ISSYMREF; | |
a876ed83 JH |
569 | continue; |
570 | } | |
ca8db142 | 571 | } |
a876ed83 | 572 | |
7a21632f DS |
573 | /* Is it a directory? */ |
574 | if (S_ISDIR(st.st_mode)) { | |
575 | errno = EISDIR; | |
576 | return NULL; | |
577 | } | |
578 | ||
a876ed83 JH |
579 | /* |
580 | * Anything else, just open it and try to use it as | |
581 | * a ref | |
582 | */ | |
583 | fd = open(path, O_RDONLY); | |
584 | if (fd < 0) | |
585 | return NULL; | |
93d26e4c | 586 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
a876ed83 | 587 | close(fd); |
28775050 MH |
588 | if (len < 0) |
589 | return NULL; | |
590 | while (len && isspace(buffer[len-1])) | |
591 | len--; | |
592 | buffer[len] = '\0'; | |
a876ed83 JH |
593 | |
594 | /* | |
595 | * Is it a symbolic ref? | |
596 | */ | |
28775050 | 597 | if (prefixcmp(buffer, "ref:")) |
a876ed83 | 598 | break; |
55956350 JH |
599 | if (flag) |
600 | *flag |= REF_ISSYMREF; | |
a876ed83 | 601 | buf = buffer + 4; |
28775050 MH |
602 | while (isspace(*buf)) |
603 | buf++; | |
313fb010 | 604 | if (check_refname_format(buf, REFNAME_ALLOW_ONELEVEL)) { |
55956350 JH |
605 | if (flag) |
606 | *flag |= REF_ISBROKEN; | |
313fb010 MH |
607 | return NULL; |
608 | } | |
dfefa935 | 609 | refname = strcpy(refname_buffer, buf); |
8a65ff76 | 610 | } |
f989fea0 MH |
611 | /* Please note that FETCH_HEAD has a second line containing other data. */ |
612 | if (get_sha1_hex(buffer, sha1) || (buffer[40] != '\0' && !isspace(buffer[40]))) { | |
55956350 JH |
613 | if (flag) |
614 | *flag |= REF_ISBROKEN; | |
a876ed83 | 615 | return NULL; |
629cd3ac | 616 | } |
dfefa935 | 617 | return refname; |
a876ed83 JH |
618 | } |
619 | ||
d08bae7e IL |
620 | /* The argument to filter_refs */ |
621 | struct ref_filter { | |
622 | const char *pattern; | |
623 | each_ref_fn *fn; | |
624 | void *cb_data; | |
625 | }; | |
626 | ||
dfefa935 | 627 | int read_ref_full(const char *refname, unsigned char *sha1, int reading, int *flags) |
a876ed83 | 628 | { |
dfefa935 | 629 | if (resolve_ref(refname, sha1, reading, flags)) |
a876ed83 JH |
630 | return 0; |
631 | return -1; | |
8a65ff76 LT |
632 | } |
633 | ||
dfefa935 | 634 | int read_ref(const char *refname, unsigned char *sha1) |
c6893323 | 635 | { |
dfefa935 | 636 | return read_ref_full(refname, sha1, 1, NULL); |
c6893323 NTND |
637 | } |
638 | ||
f8948e2f | 639 | #define DO_FOR_EACH_INCLUDE_BROKEN 01 |
ef06b918 | 640 | static int do_one_ref(const char *base, each_ref_fn fn, int trim, |
e9c4c111 | 641 | int flags, void *cb_data, struct ref_entry *entry) |
ef06b918 | 642 | { |
b3cfc406 | 643 | if (prefixcmp(entry->name, base)) |
ef06b918 | 644 | return 0; |
e01de1c9 | 645 | |
f8948e2f | 646 | if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { |
98ac34b2 JH |
647 | if (entry->flag & REF_ISBROKEN) |
648 | return 0; /* ignore broken refs e.g. dangling symref */ | |
f8948e2f JH |
649 | if (!has_sha1_file(entry->sha1)) { |
650 | error("%s does not point to a valid object!", entry->name); | |
651 | return 0; | |
652 | } | |
ef06b918 | 653 | } |
0ae91be0 | 654 | current_ref = entry; |
ef06b918 JH |
655 | return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); |
656 | } | |
657 | ||
85be1fe3 | 658 | static int filter_refs(const char *refname, const unsigned char *sha1, int flags, |
dfefa935 | 659 | void *data) |
d08bae7e IL |
660 | { |
661 | struct ref_filter *filter = (struct ref_filter *)data; | |
dfefa935 | 662 | if (fnmatch(filter->pattern, refname, 0)) |
d08bae7e | 663 | return 0; |
85be1fe3 | 664 | return filter->fn(refname, sha1, flags, filter->cb_data); |
d08bae7e IL |
665 | } |
666 | ||
dfefa935 | 667 | int peel_ref(const char *refname, unsigned char *sha1) |
cf0adba7 JH |
668 | { |
669 | int flag; | |
670 | unsigned char base[20]; | |
671 | struct object *o; | |
672 | ||
dfefa935 MH |
673 | if (current_ref && (current_ref->name == refname |
674 | || !strcmp(current_ref->name, refname))) { | |
0ae91be0 SP |
675 | if (current_ref->flag & REF_KNOWS_PEELED) { |
676 | hashcpy(sha1, current_ref->peeled); | |
677 | return 0; | |
678 | } | |
679 | hashcpy(base, current_ref->sha1); | |
680 | goto fallback; | |
681 | } | |
682 | ||
dfefa935 | 683 | if (read_ref_full(refname, base, 1, &flag)) |
cf0adba7 JH |
684 | return -1; |
685 | ||
686 | if ((flag & REF_ISPACKED)) { | |
316b097a | 687 | struct ref_array *array = get_packed_refs(get_ref_cache(NULL)); |
dfefa935 | 688 | struct ref_entry *r = search_ref_array(array, refname); |
cf0adba7 | 689 | |
e9c4c111 JP |
690 | if (r != NULL && r->flag & REF_KNOWS_PEELED) { |
691 | hashcpy(sha1, r->peeled); | |
692 | return 0; | |
cf0adba7 | 693 | } |
cf0adba7 JH |
694 | } |
695 | ||
0ae91be0 | 696 | fallback: |
cf0adba7 | 697 | o = parse_object(base); |
8c87dc77 | 698 | if (o && o->type == OBJ_TAG) { |
dfefa935 | 699 | o = deref_tag(o, refname, 0); |
cf0adba7 JH |
700 | if (o) { |
701 | hashcpy(sha1, o->sha1); | |
702 | return 0; | |
703 | } | |
704 | } | |
705 | return -1; | |
706 | } | |
707 | ||
0bad611b HV |
708 | static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn, |
709 | int trim, int flags, void *cb_data) | |
8a65ff76 | 710 | { |
e9c4c111 | 711 | int retval = 0, i, p = 0, l = 0; |
316b097a MH |
712 | struct ref_cache *refs = get_ref_cache(submodule); |
713 | struct ref_array *packed = get_packed_refs(refs); | |
714 | struct ref_array *loose = get_loose_refs(refs); | |
8a65ff76 | 715 | |
e9c4c111 | 716 | struct ref_array *extra = &extra_refs; |
e142a3c6 | 717 | |
e9c4c111 JP |
718 | for (i = 0; i < extra->nr; i++) |
719 | retval = do_one_ref(base, fn, trim, flags, cb_data, extra->refs[i]); | |
e142a3c6 | 720 | |
e9c4c111 JP |
721 | while (p < packed->nr && l < loose->nr) { |
722 | struct ref_entry *entry; | |
723 | int cmp = strcmp(packed->refs[p]->name, loose->refs[l]->name); | |
e1e22e37 | 724 | if (!cmp) { |
e9c4c111 | 725 | p++; |
e1e22e37 | 726 | continue; |
6cada6a9 | 727 | } |
e1e22e37 | 728 | if (cmp > 0) { |
e9c4c111 | 729 | entry = loose->refs[l++]; |
e1e22e37 | 730 | } else { |
e9c4c111 | 731 | entry = packed->refs[p++]; |
e1e22e37 | 732 | } |
f8948e2f | 733 | retval = do_one_ref(base, fn, trim, flags, cb_data, entry); |
e1e22e37 | 734 | if (retval) |
0ae91be0 | 735 | goto end_each; |
e1e22e37 | 736 | } |
8a65ff76 | 737 | |
e9c4c111 JP |
738 | if (l < loose->nr) { |
739 | p = l; | |
740 | packed = loose; | |
741 | } | |
742 | ||
743 | for (; p < packed->nr; p++) { | |
744 | retval = do_one_ref(base, fn, trim, flags, cb_data, packed->refs[p]); | |
ef06b918 | 745 | if (retval) |
0ae91be0 | 746 | goto end_each; |
8a65ff76 | 747 | } |
0ae91be0 SP |
748 | |
749 | end_each: | |
750 | current_ref = NULL; | |
751 | return retval; | |
8a65ff76 LT |
752 | } |
753 | ||
0bad611b HV |
754 | |
755 | static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data) | |
723c31fe LT |
756 | { |
757 | unsigned char sha1[20]; | |
8da19775 JH |
758 | int flag; |
759 | ||
0bad611b HV |
760 | if (submodule) { |
761 | if (resolve_gitlink_ref(submodule, "HEAD", sha1) == 0) | |
762 | return fn("HEAD", sha1, 0, cb_data); | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
c6893323 | 767 | if (!read_ref_full("HEAD", sha1, 1, &flag)) |
8da19775 | 768 | return fn("HEAD", sha1, flag, cb_data); |
0bad611b | 769 | |
2f34ba32 | 770 | return 0; |
723c31fe LT |
771 | } |
772 | ||
0bad611b HV |
773 | int head_ref(each_ref_fn fn, void *cb_data) |
774 | { | |
775 | return do_head_ref(NULL, fn, cb_data); | |
776 | } | |
777 | ||
9ef6aeb0 HV |
778 | int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
779 | { | |
780 | return do_head_ref(submodule, fn, cb_data); | |
781 | } | |
782 | ||
cb5d709f | 783 | int for_each_ref(each_ref_fn fn, void *cb_data) |
8a65ff76 | 784 | { |
b3cfc406 | 785 | return do_for_each_ref(NULL, "", fn, 0, 0, cb_data); |
a62be77f SE |
786 | } |
787 | ||
9ef6aeb0 HV |
788 | int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
789 | { | |
b3cfc406 | 790 | return do_for_each_ref(submodule, "", fn, 0, 0, cb_data); |
a62be77f SE |
791 | } |
792 | ||
2a8177b6 CC |
793 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) |
794 | { | |
0bad611b | 795 | return do_for_each_ref(NULL, prefix, fn, strlen(prefix), 0, cb_data); |
2a8177b6 CC |
796 | } |
797 | ||
9ef6aeb0 HV |
798 | int for_each_ref_in_submodule(const char *submodule, const char *prefix, |
799 | each_ref_fn fn, void *cb_data) | |
800 | { | |
801 | return do_for_each_ref(submodule, prefix, fn, strlen(prefix), 0, cb_data); | |
2a8177b6 CC |
802 | } |
803 | ||
cb5d709f | 804 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 805 | { |
2a8177b6 | 806 | return for_each_ref_in("refs/tags/", fn, cb_data); |
a62be77f SE |
807 | } |
808 | ||
9ef6aeb0 HV |
809 | int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
810 | { | |
811 | return for_each_ref_in_submodule(submodule, "refs/tags/", fn, cb_data); | |
812 | } | |
813 | ||
cb5d709f | 814 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 815 | { |
2a8177b6 | 816 | return for_each_ref_in("refs/heads/", fn, cb_data); |
a62be77f SE |
817 | } |
818 | ||
9ef6aeb0 HV |
819 | int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
820 | { | |
821 | return for_each_ref_in_submodule(submodule, "refs/heads/", fn, cb_data); | |
822 | } | |
823 | ||
cb5d709f | 824 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 825 | { |
2a8177b6 | 826 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
f8948e2f JH |
827 | } |
828 | ||
9ef6aeb0 HV |
829 | int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
830 | { | |
831 | return for_each_ref_in_submodule(submodule, "refs/remotes/", fn, cb_data); | |
832 | } | |
833 | ||
29268700 CC |
834 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) |
835 | { | |
0bad611b | 836 | return do_for_each_ref(NULL, "refs/replace/", fn, 13, 0, cb_data); |
29268700 CC |
837 | } |
838 | ||
a1bea2c1 JT |
839 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) |
840 | { | |
841 | struct strbuf buf = STRBUF_INIT; | |
842 | int ret = 0; | |
843 | unsigned char sha1[20]; | |
844 | int flag; | |
845 | ||
846 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); | |
c6893323 | 847 | if (!read_ref_full(buf.buf, sha1, 1, &flag)) |
a1bea2c1 JT |
848 | ret = fn(buf.buf, sha1, flag, cb_data); |
849 | strbuf_release(&buf); | |
850 | ||
851 | return ret; | |
852 | } | |
853 | ||
854 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
855 | { | |
856 | struct strbuf buf = STRBUF_INIT; | |
857 | int ret; | |
858 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
859 | ret = do_for_each_ref(NULL, buf.buf, fn, 0, 0, cb_data); | |
860 | strbuf_release(&buf); | |
861 | return ret; | |
862 | } | |
863 | ||
b09fe971 IL |
864 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
865 | const char *prefix, void *cb_data) | |
d08bae7e IL |
866 | { |
867 | struct strbuf real_pattern = STRBUF_INIT; | |
868 | struct ref_filter filter; | |
d08bae7e IL |
869 | int ret; |
870 | ||
b09fe971 | 871 | if (!prefix && prefixcmp(pattern, "refs/")) |
d08bae7e | 872 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
873 | else if (prefix) |
874 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
875 | strbuf_addstr(&real_pattern, pattern); |
876 | ||
894a9d33 | 877 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 878 | /* Append implied '/' '*' if not present. */ |
d08bae7e IL |
879 | if (real_pattern.buf[real_pattern.len - 1] != '/') |
880 | strbuf_addch(&real_pattern, '/'); | |
881 | /* No need to check for '*', there is none. */ | |
882 | strbuf_addch(&real_pattern, '*'); | |
883 | } | |
884 | ||
885 | filter.pattern = real_pattern.buf; | |
886 | filter.fn = fn; | |
887 | filter.cb_data = cb_data; | |
888 | ret = for_each_ref(filter_refs, &filter); | |
889 | ||
890 | strbuf_release(&real_pattern); | |
891 | return ret; | |
892 | } | |
893 | ||
b09fe971 IL |
894 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
895 | { | |
896 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
897 | } | |
898 | ||
f8948e2f JH |
899 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
900 | { | |
b3cfc406 | 901 | return do_for_each_ref(NULL, "", fn, 0, |
f8948e2f | 902 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); |
8a65ff76 LT |
903 | } |
904 | ||
03feddd6 JH |
905 | /* |
906 | * Make sure "ref" is something reasonable to have under ".git/refs/"; | |
907 | * We do not like it if: | |
908 | * | |
909 | * - any path component of it begins with ".", or | |
910 | * - it has double dots "..", or | |
911 | * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or | |
912 | * - it ends with a "/". | |
3e262b95 | 913 | * - it ends with ".lock" |
a4c2e699 | 914 | * - it contains a "\" (backslash) |
03feddd6 JH |
915 | */ |
916 | ||
9224b73b | 917 | /* Return true iff ch is not allowed in reference names. */ |
03feddd6 JH |
918 | static inline int bad_ref_char(int ch) |
919 | { | |
f3738c1c | 920 | if (((unsigned) ch) <= ' ' || ch == 0x7f || |
a4c2e699 | 921 | ch == '~' || ch == '^' || ch == ':' || ch == '\\') |
8558fd9e DB |
922 | return 1; |
923 | /* 2.13 Pattern Matching Notation */ | |
9224b73b | 924 | if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */ |
8558fd9e | 925 | return 1; |
8558fd9e | 926 | return 0; |
03feddd6 JH |
927 | } |
928 | ||
49295d4e | 929 | /* |
dfefa935 | 930 | * Try to read one refname component from the front of refname. Return |
49295d4e MH |
931 | * the length of the component found, or -1 if the component is not |
932 | * legal. | |
933 | */ | |
dfefa935 | 934 | static int check_refname_component(const char *refname, int flags) |
95fc7512 | 935 | { |
49295d4e MH |
936 | const char *cp; |
937 | char last = '\0'; | |
03feddd6 | 938 | |
dfefa935 | 939 | for (cp = refname; ; cp++) { |
49295d4e MH |
940 | char ch = *cp; |
941 | if (ch == '\0' || ch == '/') | |
942 | break; | |
943 | if (bad_ref_char(ch)) | |
944 | return -1; /* Illegal character in refname. */ | |
945 | if (last == '.' && ch == '.') | |
946 | return -1; /* Refname contains "..". */ | |
947 | if (last == '@' && ch == '{') | |
948 | return -1; /* Refname contains "@{". */ | |
cbdffe40 | 949 | last = ch; |
49295d4e | 950 | } |
dfefa935 | 951 | if (cp == refname) |
49295d4e | 952 | return -1; /* Component has zero length. */ |
dfefa935 | 953 | if (refname[0] == '.') { |
dce4bab6 MH |
954 | if (!(flags & REFNAME_DOT_COMPONENT)) |
955 | return -1; /* Component starts with '.'. */ | |
956 | /* | |
957 | * Even if leading dots are allowed, don't allow "." | |
958 | * as a component (".." is prevented by a rule above). | |
959 | */ | |
dfefa935 | 960 | if (refname[1] == '\0') |
dce4bab6 MH |
961 | return -1; /* Component equals ".". */ |
962 | } | |
dfefa935 | 963 | if (cp - refname >= 5 && !memcmp(cp - 5, ".lock", 5)) |
7e9d2fe9 | 964 | return -1; /* Refname ends with ".lock". */ |
dfefa935 | 965 | return cp - refname; |
49295d4e MH |
966 | } |
967 | ||
dfefa935 | 968 | int check_refname_format(const char *refname, int flags) |
95fc7512 | 969 | { |
49295d4e | 970 | int component_len, component_count = 0; |
03feddd6 | 971 | |
03feddd6 | 972 | while (1) { |
49295d4e | 973 | /* We are at the start of a path component. */ |
dfefa935 | 974 | component_len = check_refname_component(refname, flags); |
49295d4e MH |
975 | if (component_len < 0) { |
976 | if ((flags & REFNAME_REFSPEC_PATTERN) && | |
dfefa935 MH |
977 | refname[0] == '*' && |
978 | (refname[1] == '\0' || refname[1] == '/')) { | |
8d9c5010 MH |
979 | /* Accept one wildcard as a full refname component. */ |
980 | flags &= ~REFNAME_REFSPEC_PATTERN; | |
49295d4e MH |
981 | component_len = 1; |
982 | } else { | |
8d9c5010 | 983 | return -1; |
49295d4e | 984 | } |
03feddd6 | 985 | } |
49295d4e | 986 | component_count++; |
dfefa935 | 987 | if (refname[component_len] == '\0') |
49295d4e MH |
988 | break; |
989 | /* Skip to next component. */ | |
dfefa935 | 990 | refname += component_len + 1; |
03feddd6 | 991 | } |
49295d4e | 992 | |
dfefa935 | 993 | if (refname[component_len - 1] == '.') |
49295d4e | 994 | return -1; /* Refname ends with '.'. */ |
49295d4e MH |
995 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) |
996 | return -1; /* Refname has only one component. */ | |
997 | return 0; | |
95fc7512 DB |
998 | } |
999 | ||
4577e483 | 1000 | const char *prettify_refname(const char *name) |
a9c37a72 | 1001 | { |
a9c37a72 DB |
1002 | return name + ( |
1003 | !prefixcmp(name, "refs/heads/") ? 11 : | |
1004 | !prefixcmp(name, "refs/tags/") ? 10 : | |
1005 | !prefixcmp(name, "refs/remotes/") ? 13 : | |
1006 | 0); | |
1007 | } | |
1008 | ||
79803322 SP |
1009 | const char *ref_rev_parse_rules[] = { |
1010 | "%.*s", | |
1011 | "refs/%.*s", | |
1012 | "refs/tags/%.*s", | |
1013 | "refs/heads/%.*s", | |
1014 | "refs/remotes/%.*s", | |
1015 | "refs/remotes/%.*s/HEAD", | |
1016 | NULL | |
1017 | }; | |
1018 | ||
1019 | int refname_match(const char *abbrev_name, const char *full_name, const char **rules) | |
1020 | { | |
1021 | const char **p; | |
1022 | const int abbrev_name_len = strlen(abbrev_name); | |
1023 | ||
1024 | for (p = rules; *p; p++) { | |
1025 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { | |
1026 | return 1; | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
e5f38ec3 | 1033 | static struct ref_lock *verify_lock(struct ref_lock *lock, |
4bd18c43 SP |
1034 | const unsigned char *old_sha1, int mustexist) |
1035 | { | |
c6893323 | 1036 | if (read_ref_full(lock->ref_name, lock->old_sha1, mustexist, NULL)) { |
434cd0cd | 1037 | error("Can't verify ref %s", lock->ref_name); |
4bd18c43 SP |
1038 | unlock_ref(lock); |
1039 | return NULL; | |
1040 | } | |
a89fccd2 | 1041 | if (hashcmp(lock->old_sha1, old_sha1)) { |
434cd0cd | 1042 | error("Ref %s is at %s but expected %s", lock->ref_name, |
4bd18c43 SP |
1043 | sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1)); |
1044 | unlock_ref(lock); | |
1045 | return NULL; | |
1046 | } | |
1047 | return lock; | |
1048 | } | |
1049 | ||
7155b727 | 1050 | static int remove_empty_directories(const char *file) |
bc7127ef JH |
1051 | { |
1052 | /* we want to create a file but there is a directory there; | |
1053 | * if that is an empty directory (or a directory that contains | |
1054 | * only empty directories), remove them. | |
1055 | */ | |
7155b727 JS |
1056 | struct strbuf path; |
1057 | int result; | |
bc7127ef | 1058 | |
7155b727 JS |
1059 | strbuf_init(&path, 20); |
1060 | strbuf_addstr(&path, file); | |
1061 | ||
a0f4afbe | 1062 | result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY); |
7155b727 JS |
1063 | |
1064 | strbuf_release(&path); | |
1065 | ||
1066 | return result; | |
bc7127ef JH |
1067 | } |
1068 | ||
19b68b1e MH |
1069 | /* |
1070 | * Return true iff a reference named refname could be created without | |
1071 | * conflicting with the name of an existing reference. If oldrefname | |
1072 | * is non-NULL, ignore potential conflicts with oldrefname (e.g., | |
1073 | * because oldrefname is scheduled for deletion in the same | |
1074 | * operation). | |
1075 | */ | |
dfefa935 | 1076 | static int is_refname_available(const char *refname, const char *oldrefname, |
19b68b1e | 1077 | struct ref_array *array) |
c976d415 | 1078 | { |
dfefa935 | 1079 | int i, namlen = strlen(refname); /* e.g. 'foo/bar' */ |
e9c4c111 JP |
1080 | for (i = 0; i < array->nr; i++ ) { |
1081 | struct ref_entry *entry = array->refs[i]; | |
1082 | /* entry->name could be 'foo' or 'foo/bar/baz' */ | |
dfefa935 | 1083 | if (!oldrefname || strcmp(oldrefname, entry->name)) { |
e9c4c111 | 1084 | int len = strlen(entry->name); |
c976d415 | 1085 | int cmplen = (namlen < len) ? namlen : len; |
dfefa935 MH |
1086 | const char *lead = (namlen < len) ? entry->name : refname; |
1087 | if (!strncmp(refname, entry->name, cmplen) && | |
c976d415 | 1088 | lead[cmplen] == '/') { |
19b68b1e MH |
1089 | error("'%s' exists; cannot create '%s'", |
1090 | entry->name, refname); | |
c976d415 LH |
1091 | return 0; |
1092 | } | |
1093 | } | |
c976d415 LH |
1094 | } |
1095 | return 1; | |
1096 | } | |
1097 | ||
ff74f7f1 JH |
1098 | /* |
1099 | * *string and *len will only be substituted, and *string returned (for | |
1100 | * later free()ing) if the string passed in is a magic short-hand form | |
1101 | * to name a branch. | |
1102 | */ | |
1103 | static char *substitute_branch_name(const char **string, int *len) | |
1104 | { | |
1105 | struct strbuf buf = STRBUF_INIT; | |
1106 | int ret = interpret_branch_name(*string, &buf); | |
1107 | ||
1108 | if (ret == *len) { | |
1109 | size_t size; | |
1110 | *string = strbuf_detach(&buf, &size); | |
1111 | *len = size; | |
1112 | return (char *)*string; | |
1113 | } | |
1114 | ||
1115 | return NULL; | |
1116 | } | |
1117 | ||
1118 | int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
1119 | { | |
1120 | char *last_branch = substitute_branch_name(&str, &len); | |
1121 | const char **p, *r; | |
1122 | int refs_found = 0; | |
1123 | ||
1124 | *ref = NULL; | |
1125 | for (p = ref_rev_parse_rules; *p; p++) { | |
1126 | char fullref[PATH_MAX]; | |
1127 | unsigned char sha1_from_ref[20]; | |
1128 | unsigned char *this_result; | |
1129 | int flag; | |
1130 | ||
1131 | this_result = refs_found ? sha1_from_ref : sha1; | |
1132 | mksnpath(fullref, sizeof(fullref), *p, len, str); | |
1133 | r = resolve_ref(fullref, this_result, 1, &flag); | |
1134 | if (r) { | |
1135 | if (!refs_found++) | |
1136 | *ref = xstrdup(r); | |
1137 | if (!warn_ambiguous_refs) | |
1138 | break; | |
55956350 | 1139 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD")) { |
ff74f7f1 | 1140 | warning("ignoring dangling symref %s.", fullref); |
55956350 JH |
1141 | } else if ((flag & REF_ISBROKEN) && strchr(fullref, '/')) { |
1142 | warning("ignoring broken ref %s.", fullref); | |
1143 | } | |
ff74f7f1 JH |
1144 | } |
1145 | free(last_branch); | |
1146 | return refs_found; | |
1147 | } | |
1148 | ||
1149 | int dwim_log(const char *str, int len, unsigned char *sha1, char **log) | |
1150 | { | |
1151 | char *last_branch = substitute_branch_name(&str, &len); | |
1152 | const char **p; | |
1153 | int logs_found = 0; | |
1154 | ||
1155 | *log = NULL; | |
1156 | for (p = ref_rev_parse_rules; *p; p++) { | |
1157 | struct stat st; | |
1158 | unsigned char hash[20]; | |
1159 | char path[PATH_MAX]; | |
1160 | const char *ref, *it; | |
1161 | ||
1162 | mksnpath(path, sizeof(path), *p, len, str); | |
1163 | ref = resolve_ref(path, hash, 1, NULL); | |
1164 | if (!ref) | |
1165 | continue; | |
1166 | if (!stat(git_path("logs/%s", path), &st) && | |
1167 | S_ISREG(st.st_mode)) | |
1168 | it = path; | |
1169 | else if (strcmp(ref, path) && | |
1170 | !stat(git_path("logs/%s", ref), &st) && | |
1171 | S_ISREG(st.st_mode)) | |
1172 | it = ref; | |
1173 | else | |
1174 | continue; | |
1175 | if (!logs_found++) { | |
1176 | *log = xstrdup(it); | |
1177 | hashcpy(sha1, hash); | |
1178 | } | |
1179 | if (!warn_ambiguous_refs) | |
1180 | break; | |
1181 | } | |
1182 | free(last_branch); | |
1183 | return logs_found; | |
1184 | } | |
1185 | ||
dfefa935 MH |
1186 | static struct ref_lock *lock_ref_sha1_basic(const char *refname, |
1187 | const unsigned char *old_sha1, | |
1188 | int flags, int *type_p) | |
4bd18c43 | 1189 | { |
434cd0cd | 1190 | char *ref_file; |
dfefa935 | 1191 | const char *orig_refname = refname; |
4bd18c43 | 1192 | struct ref_lock *lock; |
5cc3cef9 | 1193 | int last_errno = 0; |
acd3b9ec | 1194 | int type, lflags; |
4431fcc4 | 1195 | int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); |
5bdd8d4a | 1196 | int missing = 0; |
4bd18c43 SP |
1197 | |
1198 | lock = xcalloc(1, sizeof(struct ref_lock)); | |
1199 | lock->lock_fd = -1; | |
1200 | ||
dfefa935 MH |
1201 | refname = resolve_ref(refname, lock->old_sha1, mustexist, &type); |
1202 | if (!refname && errno == EISDIR) { | |
bc7127ef JH |
1203 | /* we are trying to lock foo but we used to |
1204 | * have foo/bar which now does not exist; | |
1205 | * it is normal for the empty directory 'foo' | |
1206 | * to remain. | |
1207 | */ | |
dfefa935 | 1208 | ref_file = git_path("%s", orig_refname); |
5cc3cef9 JH |
1209 | if (remove_empty_directories(ref_file)) { |
1210 | last_errno = errno; | |
dfefa935 | 1211 | error("there are still refs under '%s'", orig_refname); |
5cc3cef9 JH |
1212 | goto error_return; |
1213 | } | |
dfefa935 | 1214 | refname = resolve_ref(orig_refname, lock->old_sha1, mustexist, &type); |
bc7127ef | 1215 | } |
68db31cc SV |
1216 | if (type_p) |
1217 | *type_p = type; | |
dfefa935 | 1218 | if (!refname) { |
5cc3cef9 | 1219 | last_errno = errno; |
818f477c | 1220 | error("unable to resolve reference %s: %s", |
dfefa935 | 1221 | orig_refname, strerror(errno)); |
5cc3cef9 | 1222 | goto error_return; |
4bd18c43 | 1223 | } |
5bdd8d4a | 1224 | missing = is_null_sha1(lock->old_sha1); |
c976d415 LH |
1225 | /* When the ref did not exist and we are creating it, |
1226 | * make sure there is no existing ref that is packed | |
1227 | * whose name begins with our refname, nor a ref whose | |
1228 | * name is a proper prefix of our refname. | |
1229 | */ | |
5bdd8d4a | 1230 | if (missing && |
316b097a | 1231 | !is_refname_available(refname, NULL, get_packed_refs(get_ref_cache(NULL)))) { |
f475e08e | 1232 | last_errno = ENOTDIR; |
c976d415 | 1233 | goto error_return; |
f475e08e | 1234 | } |
22a3844e | 1235 | |
c33d5174 | 1236 | lock->lk = xcalloc(1, sizeof(struct lock_file)); |
4bd18c43 | 1237 | |
acd3b9ec JH |
1238 | lflags = LOCK_DIE_ON_ERROR; |
1239 | if (flags & REF_NODEREF) { | |
dfefa935 | 1240 | refname = orig_refname; |
acd3b9ec JH |
1241 | lflags |= LOCK_NODEREF; |
1242 | } | |
dfefa935 MH |
1243 | lock->ref_name = xstrdup(refname); |
1244 | lock->orig_ref_name = xstrdup(orig_refname); | |
1245 | ref_file = git_path("%s", refname); | |
5bdd8d4a | 1246 | if (missing) |
68db31cc SV |
1247 | lock->force_write = 1; |
1248 | if ((flags & REF_NODEREF) && (type & REF_ISSYMREF)) | |
1249 | lock->force_write = 1; | |
4bd18c43 | 1250 | |
5cc3cef9 JH |
1251 | if (safe_create_leading_directories(ref_file)) { |
1252 | last_errno = errno; | |
1253 | error("unable to create directory for %s", ref_file); | |
1254 | goto error_return; | |
1255 | } | |
4bd18c43 | 1256 | |
acd3b9ec | 1257 | lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags); |
4bd18c43 | 1258 | return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock; |
5cc3cef9 JH |
1259 | |
1260 | error_return: | |
1261 | unlock_ref(lock); | |
1262 | errno = last_errno; | |
1263 | return NULL; | |
4bd18c43 SP |
1264 | } |
1265 | ||
dfefa935 | 1266 | struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1) |
95fc7512 | 1267 | { |
53cce84c | 1268 | char refpath[PATH_MAX]; |
dfefa935 | 1269 | if (check_refname_format(refname, 0)) |
4bd18c43 | 1270 | return NULL; |
dfefa935 | 1271 | strcpy(refpath, mkpath("refs/%s", refname)); |
68db31cc | 1272 | return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL); |
4bd18c43 SP |
1273 | } |
1274 | ||
dfefa935 MH |
1275 | struct ref_lock *lock_any_ref_for_update(const char *refname, |
1276 | const unsigned char *old_sha1, int flags) | |
4bd18c43 | 1277 | { |
dfefa935 | 1278 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) |
257f3020 | 1279 | return NULL; |
dfefa935 | 1280 | return lock_ref_sha1_basic(refname, old_sha1, flags, NULL); |
c0277d15 JH |
1281 | } |
1282 | ||
26a063a1 JH |
1283 | static struct lock_file packlock; |
1284 | ||
c0277d15 JH |
1285 | static int repack_without_ref(const char *refname) |
1286 | { | |
e9c4c111 | 1287 | struct ref_array *packed; |
e9c4c111 | 1288 | int fd, i; |
c0277d15 | 1289 | |
316b097a | 1290 | packed = get_packed_refs(get_ref_cache(NULL)); |
fe9c7b78 | 1291 | if (search_ref_array(packed, refname) == NULL) |
c0277d15 | 1292 | return 0; |
c0277d15 | 1293 | fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0); |
1b018fd9 MV |
1294 | if (fd < 0) { |
1295 | unable_to_lock_error(git_path("packed-refs"), errno); | |
c0277d15 | 1296 | return error("cannot delete '%s' from packed refs", refname); |
1b018fd9 | 1297 | } |
c0277d15 | 1298 | |
e9c4c111 | 1299 | for (i = 0; i < packed->nr; i++) { |
c0277d15 JH |
1300 | char line[PATH_MAX + 100]; |
1301 | int len; | |
fe9c7b78 | 1302 | struct ref_entry *ref = packed->refs[i]; |
e9c4c111 JP |
1303 | |
1304 | if (!strcmp(refname, ref->name)) | |
c0277d15 JH |
1305 | continue; |
1306 | len = snprintf(line, sizeof(line), "%s %s\n", | |
e9c4c111 | 1307 | sha1_to_hex(ref->sha1), ref->name); |
c0277d15 JH |
1308 | /* this should not happen but just being defensive */ |
1309 | if (len > sizeof(line)) | |
e9c4c111 | 1310 | die("too long a refname '%s'", ref->name); |
c0277d15 JH |
1311 | write_or_die(fd, line, len); |
1312 | } | |
1313 | return commit_lock_file(&packlock); | |
1314 | } | |
1315 | ||
eca35a25 | 1316 | int delete_ref(const char *refname, const unsigned char *sha1, int delopt) |
c0277d15 JH |
1317 | { |
1318 | struct ref_lock *lock; | |
eca35a25 | 1319 | int err, i = 0, ret = 0, flag = 0; |
c0277d15 | 1320 | |
68db31cc | 1321 | lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); |
c0277d15 JH |
1322 | if (!lock) |
1323 | return 1; | |
045a476f | 1324 | if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { |
c0277d15 | 1325 | /* loose */ |
eca35a25 MV |
1326 | const char *path; |
1327 | ||
1328 | if (!(delopt & REF_NODEREF)) { | |
1329 | i = strlen(lock->lk->filename) - 5; /* .lock */ | |
1330 | lock->lk->filename[i] = 0; | |
1331 | path = lock->lk->filename; | |
1332 | } else { | |
9db56f71 | 1333 | path = git_path("%s", refname); |
eca35a25 | 1334 | } |
691f1a28 AR |
1335 | err = unlink_or_warn(path); |
1336 | if (err && errno != ENOENT) | |
c0277d15 | 1337 | ret = 1; |
691f1a28 | 1338 | |
eca35a25 MV |
1339 | if (!(delopt & REF_NODEREF)) |
1340 | lock->lk->filename[i] = '.'; | |
c0277d15 JH |
1341 | } |
1342 | /* removing the loose one could have resurrected an earlier | |
1343 | * packed one. Also, if it was not loose we need to repack | |
1344 | * without it. | |
1345 | */ | |
1346 | ret |= repack_without_ref(refname); | |
1347 | ||
691f1a28 | 1348 | unlink_or_warn(git_path("logs/%s", lock->ref_name)); |
3870a0d1 | 1349 | invalidate_ref_cache(NULL); |
c0277d15 JH |
1350 | unlock_ref(lock); |
1351 | return ret; | |
4bd18c43 SP |
1352 | } |
1353 | ||
765c2258 PH |
1354 | /* |
1355 | * People using contrib's git-new-workdir have .git/logs/refs -> | |
1356 | * /some/other/path/.git/logs/refs, and that may live on another device. | |
1357 | * | |
1358 | * IOW, to avoid cross device rename errors, the temporary renamed log must | |
1359 | * live into logs/refs. | |
1360 | */ | |
1361 | #define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log" | |
1362 | ||
dfefa935 | 1363 | int rename_ref(const char *oldrefname, const char *newrefname, const char *logmsg) |
c976d415 | 1364 | { |
c976d415 LH |
1365 | unsigned char sha1[20], orig_sha1[20]; |
1366 | int flag = 0, logmoved = 0; | |
1367 | struct ref_lock *lock; | |
c976d415 | 1368 | struct stat loginfo; |
dfefa935 | 1369 | int log = !lstat(git_path("logs/%s", oldrefname), &loginfo); |
eca35a25 | 1370 | const char *symref = NULL; |
316b097a | 1371 | struct ref_cache *refs = get_ref_cache(NULL); |
c976d415 | 1372 | |
450d4c0f | 1373 | if (log && S_ISLNK(loginfo.st_mode)) |
dfefa935 | 1374 | return error("reflog for %s is a symlink", oldrefname); |
c976d415 | 1375 | |
dfefa935 | 1376 | symref = resolve_ref(oldrefname, orig_sha1, 1, &flag); |
eca35a25 | 1377 | if (flag & REF_ISSYMREF) |
fa58186c | 1378 | return error("refname %s is a symbolic ref, renaming it is not supported", |
dfefa935 | 1379 | oldrefname); |
eca35a25 | 1380 | if (!symref) |
dfefa935 | 1381 | return error("refname %s not found", oldrefname); |
c976d415 | 1382 | |
316b097a | 1383 | if (!is_refname_available(newrefname, oldrefname, get_packed_refs(refs))) |
c976d415 LH |
1384 | return 1; |
1385 | ||
316b097a | 1386 | if (!is_refname_available(newrefname, oldrefname, get_loose_refs(refs))) |
c976d415 LH |
1387 | return 1; |
1388 | ||
dfefa935 | 1389 | if (log && rename(git_path("logs/%s", oldrefname), git_path(TMP_RENAMED_LOG))) |
765c2258 | 1390 | return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s", |
dfefa935 | 1391 | oldrefname, strerror(errno)); |
c976d415 | 1392 | |
dfefa935 MH |
1393 | if (delete_ref(oldrefname, orig_sha1, REF_NODEREF)) { |
1394 | error("unable to delete old %s", oldrefname); | |
c976d415 LH |
1395 | goto rollback; |
1396 | } | |
1397 | ||
dfefa935 MH |
1398 | if (!read_ref_full(newrefname, sha1, 1, &flag) && |
1399 | delete_ref(newrefname, sha1, REF_NODEREF)) { | |
c976d415 | 1400 | if (errno==EISDIR) { |
dfefa935 MH |
1401 | if (remove_empty_directories(git_path("%s", newrefname))) { |
1402 | error("Directory not empty: %s", newrefname); | |
c976d415 LH |
1403 | goto rollback; |
1404 | } | |
1405 | } else { | |
dfefa935 | 1406 | error("unable to delete existing %s", newrefname); |
c976d415 LH |
1407 | goto rollback; |
1408 | } | |
1409 | } | |
1410 | ||
dfefa935 MH |
1411 | if (log && safe_create_leading_directories(git_path("logs/%s", newrefname))) { |
1412 | error("unable to create directory for %s", newrefname); | |
c976d415 LH |
1413 | goto rollback; |
1414 | } | |
1415 | ||
1416 | retry: | |
dfefa935 | 1417 | if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newrefname))) { |
d9e74d57 JR |
1418 | if (errno==EISDIR || errno==ENOTDIR) { |
1419 | /* | |
1420 | * rename(a, b) when b is an existing | |
1421 | * directory ought to result in ISDIR, but | |
1422 | * Solaris 5.8 gives ENOTDIR. Sheesh. | |
1423 | */ | |
dfefa935 MH |
1424 | if (remove_empty_directories(git_path("logs/%s", newrefname))) { |
1425 | error("Directory not empty: logs/%s", newrefname); | |
c976d415 LH |
1426 | goto rollback; |
1427 | } | |
1428 | goto retry; | |
1429 | } else { | |
765c2258 | 1430 | error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s", |
dfefa935 | 1431 | newrefname, strerror(errno)); |
c976d415 LH |
1432 | goto rollback; |
1433 | } | |
1434 | } | |
1435 | logmoved = log; | |
1436 | ||
dfefa935 | 1437 | lock = lock_ref_sha1_basic(newrefname, NULL, 0, NULL); |
c976d415 | 1438 | if (!lock) { |
dfefa935 | 1439 | error("unable to lock %s for update", newrefname); |
c976d415 LH |
1440 | goto rollback; |
1441 | } | |
c976d415 LH |
1442 | lock->force_write = 1; |
1443 | hashcpy(lock->old_sha1, orig_sha1); | |
678d0f4c | 1444 | if (write_ref_sha1(lock, orig_sha1, logmsg)) { |
dfefa935 | 1445 | error("unable to write current sha1 into %s", newrefname); |
c976d415 LH |
1446 | goto rollback; |
1447 | } | |
1448 | ||
1449 | return 0; | |
1450 | ||
1451 | rollback: | |
dfefa935 | 1452 | lock = lock_ref_sha1_basic(oldrefname, NULL, 0, NULL); |
c976d415 | 1453 | if (!lock) { |
dfefa935 | 1454 | error("unable to lock %s for rollback", oldrefname); |
c976d415 LH |
1455 | goto rollbacklog; |
1456 | } | |
1457 | ||
1458 | lock->force_write = 1; | |
1459 | flag = log_all_ref_updates; | |
1460 | log_all_ref_updates = 0; | |
1461 | if (write_ref_sha1(lock, orig_sha1, NULL)) | |
dfefa935 | 1462 | error("unable to write current sha1 into %s", oldrefname); |
c976d415 LH |
1463 | log_all_ref_updates = flag; |
1464 | ||
1465 | rollbacklog: | |
dfefa935 | 1466 | if (logmoved && rename(git_path("logs/%s", newrefname), git_path("logs/%s", oldrefname))) |
c976d415 | 1467 | error("unable to restore logfile %s from %s: %s", |
dfefa935 | 1468 | oldrefname, newrefname, strerror(errno)); |
c976d415 | 1469 | if (!logmoved && log && |
dfefa935 | 1470 | rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldrefname))) |
765c2258 | 1471 | error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s", |
dfefa935 | 1472 | oldrefname, strerror(errno)); |
c976d415 LH |
1473 | |
1474 | return 1; | |
1475 | } | |
1476 | ||
435fc852 | 1477 | int close_ref(struct ref_lock *lock) |
b531394d BC |
1478 | { |
1479 | if (close_lock_file(lock->lk)) | |
1480 | return -1; | |
1481 | lock->lock_fd = -1; | |
1482 | return 0; | |
1483 | } | |
1484 | ||
435fc852 | 1485 | int commit_ref(struct ref_lock *lock) |
b531394d BC |
1486 | { |
1487 | if (commit_lock_file(lock->lk)) | |
1488 | return -1; | |
1489 | lock->lock_fd = -1; | |
1490 | return 0; | |
1491 | } | |
1492 | ||
e5f38ec3 | 1493 | void unlock_ref(struct ref_lock *lock) |
4bd18c43 | 1494 | { |
4ed7cd3a BC |
1495 | /* Do not free lock->lk -- atexit() still looks at them */ |
1496 | if (lock->lk) | |
1497 | rollback_lock_file(lock->lk); | |
434cd0cd | 1498 | free(lock->ref_name); |
1655707c | 1499 | free(lock->orig_ref_name); |
4bd18c43 SP |
1500 | free(lock); |
1501 | } | |
1502 | ||
0ec29a47 JH |
1503 | /* |
1504 | * copy the reflog message msg to buf, which has been allocated sufficiently | |
1505 | * large, while cleaning up the whitespaces. Especially, convert LF to space, | |
1506 | * because reflog file is one line per entry. | |
1507 | */ | |
1508 | static int copy_msg(char *buf, const char *msg) | |
1509 | { | |
1510 | char *cp = buf; | |
1511 | char c; | |
1512 | int wasspace = 1; | |
1513 | ||
1514 | *cp++ = '\t'; | |
1515 | while ((c = *msg++)) { | |
1516 | if (wasspace && isspace(c)) | |
1517 | continue; | |
1518 | wasspace = isspace(c); | |
1519 | if (wasspace) | |
1520 | c = ' '; | |
1521 | *cp++ = c; | |
1522 | } | |
1523 | while (buf < cp && isspace(cp[-1])) | |
1524 | cp--; | |
1525 | *cp++ = '\n'; | |
1526 | return cp - buf; | |
1527 | } | |
1528 | ||
dfefa935 | 1529 | int log_ref_setup(const char *refname, char *logfile, int bufsize) |
6de08ae6 | 1530 | { |
859c3017 | 1531 | int logfd, oflags = O_APPEND | O_WRONLY; |
9a13f0b7 | 1532 | |
dfefa935 | 1533 | git_snpath(logfile, bufsize, "logs/%s", refname); |
4057deb5 | 1534 | if (log_all_ref_updates && |
dfefa935 MH |
1535 | (!prefixcmp(refname, "refs/heads/") || |
1536 | !prefixcmp(refname, "refs/remotes/") || | |
1537 | !prefixcmp(refname, "refs/notes/") || | |
1538 | !strcmp(refname, "HEAD"))) { | |
157aaea5 | 1539 | if (safe_create_leading_directories(logfile) < 0) |
6de08ae6 | 1540 | return error("unable to create directory for %s", |
157aaea5 | 1541 | logfile); |
6de08ae6 SP |
1542 | oflags |= O_CREAT; |
1543 | } | |
1544 | ||
157aaea5 | 1545 | logfd = open(logfile, oflags, 0666); |
6de08ae6 | 1546 | if (logfd < 0) { |
1974bf62 | 1547 | if (!(oflags & O_CREAT) && errno == ENOENT) |
6de08ae6 | 1548 | return 0; |
3b463c3f JH |
1549 | |
1550 | if ((oflags & O_CREAT) && errno == EISDIR) { | |
157aaea5 | 1551 | if (remove_empty_directories(logfile)) { |
3b463c3f | 1552 | return error("There are still logs under '%s'", |
157aaea5 | 1553 | logfile); |
3b463c3f | 1554 | } |
157aaea5 | 1555 | logfd = open(logfile, oflags, 0666); |
3b463c3f JH |
1556 | } |
1557 | ||
1558 | if (logfd < 0) | |
1559 | return error("Unable to append to %s: %s", | |
157aaea5 | 1560 | logfile, strerror(errno)); |
6de08ae6 SP |
1561 | } |
1562 | ||
157aaea5 | 1563 | adjust_shared_perm(logfile); |
859c3017 EM |
1564 | close(logfd); |
1565 | return 0; | |
1566 | } | |
443b92b6 | 1567 | |
dfefa935 | 1568 | static int log_ref_write(const char *refname, const unsigned char *old_sha1, |
859c3017 EM |
1569 | const unsigned char *new_sha1, const char *msg) |
1570 | { | |
1571 | int logfd, result, written, oflags = O_APPEND | O_WRONLY; | |
1572 | unsigned maxlen, len; | |
1573 | int msglen; | |
157aaea5 | 1574 | char log_file[PATH_MAX]; |
859c3017 EM |
1575 | char *logrec; |
1576 | const char *committer; | |
1577 | ||
1578 | if (log_all_ref_updates < 0) | |
1579 | log_all_ref_updates = !is_bare_repository(); | |
1580 | ||
dfefa935 | 1581 | result = log_ref_setup(refname, log_file, sizeof(log_file)); |
859c3017 EM |
1582 | if (result) |
1583 | return result; | |
1584 | ||
1585 | logfd = open(log_file, oflags); | |
1586 | if (logfd < 0) | |
1587 | return 0; | |
0ec29a47 | 1588 | msglen = msg ? strlen(msg) : 0; |
774751a8 | 1589 | committer = git_committer_info(0); |
8ac65937 JH |
1590 | maxlen = strlen(committer) + msglen + 100; |
1591 | logrec = xmalloc(maxlen); | |
1592 | len = sprintf(logrec, "%s %s %s\n", | |
9a13f0b7 NP |
1593 | sha1_to_hex(old_sha1), |
1594 | sha1_to_hex(new_sha1), | |
8ac65937 JH |
1595 | committer); |
1596 | if (msglen) | |
0ec29a47 | 1597 | len += copy_msg(logrec + len - 1, msg) - 1; |
93822c22 | 1598 | written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1; |
6de08ae6 | 1599 | free(logrec); |
91c8d590 | 1600 | if (close(logfd) != 0 || written != len) |
9a13f0b7 | 1601 | return error("Unable to append to %s", log_file); |
6de08ae6 SP |
1602 | return 0; |
1603 | } | |
1604 | ||
c3b0dec5 LT |
1605 | static int is_branch(const char *refname) |
1606 | { | |
1607 | return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"); | |
1608 | } | |
1609 | ||
4bd18c43 SP |
1610 | int write_ref_sha1(struct ref_lock *lock, |
1611 | const unsigned char *sha1, const char *logmsg) | |
1612 | { | |
1613 | static char term = '\n'; | |
c3b0dec5 | 1614 | struct object *o; |
4bd18c43 SP |
1615 | |
1616 | if (!lock) | |
95fc7512 | 1617 | return -1; |
a89fccd2 | 1618 | if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) { |
4bd18c43 SP |
1619 | unlock_ref(lock); |
1620 | return 0; | |
95fc7512 | 1621 | } |
c3b0dec5 LT |
1622 | o = parse_object(sha1); |
1623 | if (!o) { | |
7be8b3ba | 1624 | error("Trying to write ref %s with nonexistent object %s", |
c3b0dec5 LT |
1625 | lock->ref_name, sha1_to_hex(sha1)); |
1626 | unlock_ref(lock); | |
1627 | return -1; | |
1628 | } | |
1629 | if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) { | |
1630 | error("Trying to write non-commit object %s to branch %s", | |
1631 | sha1_to_hex(sha1), lock->ref_name); | |
1632 | unlock_ref(lock); | |
1633 | return -1; | |
1634 | } | |
93822c22 AW |
1635 | if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 || |
1636 | write_in_full(lock->lock_fd, &term, 1) != 1 | |
b531394d | 1637 | || close_ref(lock) < 0) { |
c33d5174 | 1638 | error("Couldn't write %s", lock->lk->filename); |
4bd18c43 SP |
1639 | unlock_ref(lock); |
1640 | return -1; | |
1641 | } | |
8bf90dc9 | 1642 | clear_loose_ref_cache(get_ref_cache(NULL)); |
bd104db1 NP |
1643 | if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 || |
1644 | (strcmp(lock->ref_name, lock->orig_ref_name) && | |
1645 | log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) { | |
6de08ae6 SP |
1646 | unlock_ref(lock); |
1647 | return -1; | |
1648 | } | |
605fac8b NP |
1649 | if (strcmp(lock->orig_ref_name, "HEAD") != 0) { |
1650 | /* | |
1651 | * Special hack: If a branch is updated directly and HEAD | |
1652 | * points to it (may happen on the remote side of a push | |
1653 | * for example) then logically the HEAD reflog should be | |
1654 | * updated too. | |
1655 | * A generic solution implies reverse symref information, | |
1656 | * but finding all symrefs pointing to the given branch | |
1657 | * would be rather costly for this rare event (the direct | |
1658 | * update of a branch) to be worth it. So let's cheat and | |
1659 | * check with HEAD only which should cover 99% of all usage | |
1660 | * scenarios (even 100% of the default ones). | |
1661 | */ | |
1662 | unsigned char head_sha1[20]; | |
1663 | int head_flag; | |
1664 | const char *head_ref; | |
1665 | head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag); | |
1666 | if (head_ref && (head_flag & REF_ISSYMREF) && | |
1667 | !strcmp(head_ref, lock->ref_name)) | |
1668 | log_ref_write("HEAD", lock->old_sha1, sha1, logmsg); | |
1669 | } | |
b531394d | 1670 | if (commit_ref(lock)) { |
434cd0cd | 1671 | error("Couldn't set %s", lock->ref_name); |
4bd18c43 SP |
1672 | unlock_ref(lock); |
1673 | return -1; | |
1674 | } | |
4bd18c43 SP |
1675 | unlock_ref(lock); |
1676 | return 0; | |
95fc7512 | 1677 | } |
d556fae2 | 1678 | |
8b5157e4 NP |
1679 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1680 | const char *logmsg) | |
41b625b0 NP |
1681 | { |
1682 | const char *lockpath; | |
1683 | char ref[1000]; | |
1684 | int fd, len, written; | |
a4f34cbb | 1685 | char *git_HEAD = git_pathdup("%s", ref_target); |
8b5157e4 NP |
1686 | unsigned char old_sha1[20], new_sha1[20]; |
1687 | ||
1688 | if (logmsg && read_ref(ref_target, old_sha1)) | |
1689 | hashclr(old_sha1); | |
41b625b0 | 1690 | |
d48744d1 JH |
1691 | if (safe_create_leading_directories(git_HEAD) < 0) |
1692 | return error("unable to create directory for %s", git_HEAD); | |
1693 | ||
41b625b0 NP |
1694 | #ifndef NO_SYMLINK_HEAD |
1695 | if (prefer_symlink_refs) { | |
1696 | unlink(git_HEAD); | |
1697 | if (!symlink(refs_heads_master, git_HEAD)) | |
8b5157e4 | 1698 | goto done; |
41b625b0 NP |
1699 | fprintf(stderr, "no symlink - falling back to symbolic ref\n"); |
1700 | } | |
1701 | #endif | |
1702 | ||
1703 | len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master); | |
1704 | if (sizeof(ref) <= len) { | |
1705 | error("refname too long: %s", refs_heads_master); | |
47fc52e2 | 1706 | goto error_free_return; |
41b625b0 NP |
1707 | } |
1708 | lockpath = mkpath("%s.lock", git_HEAD); | |
1709 | fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1710 | if (fd < 0) { | |
1711 | error("Unable to open %s for writing", lockpath); | |
47fc52e2 | 1712 | goto error_free_return; |
41b625b0 NP |
1713 | } |
1714 | written = write_in_full(fd, ref, len); | |
91c8d590 | 1715 | if (close(fd) != 0 || written != len) { |
41b625b0 | 1716 | error("Unable to write to %s", lockpath); |
47fc52e2 | 1717 | goto error_unlink_return; |
41b625b0 NP |
1718 | } |
1719 | if (rename(lockpath, git_HEAD) < 0) { | |
41b625b0 | 1720 | error("Unable to create %s", git_HEAD); |
47fc52e2 | 1721 | goto error_unlink_return; |
41b625b0 NP |
1722 | } |
1723 | if (adjust_shared_perm(git_HEAD)) { | |
41b625b0 | 1724 | error("Unable to fix permissions on %s", lockpath); |
47fc52e2 | 1725 | error_unlink_return: |
691f1a28 | 1726 | unlink_or_warn(lockpath); |
47fc52e2 JH |
1727 | error_free_return: |
1728 | free(git_HEAD); | |
1729 | return -1; | |
41b625b0 | 1730 | } |
8b5157e4 | 1731 | |
ee96d11b | 1732 | #ifndef NO_SYMLINK_HEAD |
8b5157e4 | 1733 | done: |
ee96d11b | 1734 | #endif |
8b5157e4 NP |
1735 | if (logmsg && !read_ref(refs_heads_master, new_sha1)) |
1736 | log_ref_write(ref_target, old_sha1, new_sha1, logmsg); | |
1737 | ||
47fc52e2 | 1738 | free(git_HEAD); |
41b625b0 NP |
1739 | return 0; |
1740 | } | |
1741 | ||
16d7cc90 JH |
1742 | static char *ref_msg(const char *line, const char *endp) |
1743 | { | |
1744 | const char *ep; | |
16d7cc90 | 1745 | line += 82; |
182af834 PH |
1746 | ep = memchr(line, '\n', endp - line); |
1747 | if (!ep) | |
1748 | ep = endp; | |
1749 | return xmemdupz(line, ep - line); | |
16d7cc90 JH |
1750 | } |
1751 | ||
dfefa935 MH |
1752 | int read_ref_at(const char *refname, unsigned long at_time, int cnt, |
1753 | unsigned char *sha1, char **msg, | |
1754 | unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
d556fae2 | 1755 | { |
e5229042 | 1756 | const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec; |
d556fae2 | 1757 | char *tz_c; |
e29cb53a | 1758 | int logfd, tz, reccnt = 0; |
d556fae2 SP |
1759 | struct stat st; |
1760 | unsigned long date; | |
e5229042 | 1761 | unsigned char logged_sha1[20]; |
cb48cb58 | 1762 | void *log_mapped; |
dc49cd76 | 1763 | size_t mapsz; |
d556fae2 | 1764 | |
dfefa935 | 1765 | logfile = git_path("logs/%s", refname); |
d556fae2 SP |
1766 | logfd = open(logfile, O_RDONLY, 0); |
1767 | if (logfd < 0) | |
d824cbba | 1768 | die_errno("Unable to read log '%s'", logfile); |
d556fae2 SP |
1769 | fstat(logfd, &st); |
1770 | if (!st.st_size) | |
1771 | die("Log %s is empty.", logfile); | |
dc49cd76 SP |
1772 | mapsz = xsize_t(st.st_size); |
1773 | log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0); | |
cb48cb58 | 1774 | logdata = log_mapped; |
d556fae2 SP |
1775 | close(logfd); |
1776 | ||
e5229042 | 1777 | lastrec = NULL; |
d556fae2 SP |
1778 | rec = logend = logdata + st.st_size; |
1779 | while (logdata < rec) { | |
e29cb53a | 1780 | reccnt++; |
d556fae2 SP |
1781 | if (logdata < rec && *(rec-1) == '\n') |
1782 | rec--; | |
e5229042 SP |
1783 | lastgt = NULL; |
1784 | while (logdata < rec && *(rec-1) != '\n') { | |
d556fae2 | 1785 | rec--; |
e5229042 SP |
1786 | if (*rec == '>') |
1787 | lastgt = rec; | |
1788 | } | |
1789 | if (!lastgt) | |
d556fae2 | 1790 | die("Log %s is corrupt.", logfile); |
e5229042 | 1791 | date = strtoul(lastgt + 1, &tz_c, 10); |
ab2a1a32 | 1792 | if (date <= at_time || cnt == 0) { |
76a44c5c | 1793 | tz = strtoul(tz_c, NULL, 10); |
16d7cc90 JH |
1794 | if (msg) |
1795 | *msg = ref_msg(rec, logend); | |
1796 | if (cutoff_time) | |
1797 | *cutoff_time = date; | |
1798 | if (cutoff_tz) | |
1799 | *cutoff_tz = tz; | |
1800 | if (cutoff_cnt) | |
76a44c5c | 1801 | *cutoff_cnt = reccnt - 1; |
e5229042 SP |
1802 | if (lastrec) { |
1803 | if (get_sha1_hex(lastrec, logged_sha1)) | |
1804 | die("Log %s is corrupt.", logfile); | |
1805 | if (get_sha1_hex(rec + 41, sha1)) | |
1806 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1807 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1808 | warning("Log %s has gap after %s.", |
73013afd | 1809 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 | 1810 | } |
e5f38ec3 JH |
1811 | } |
1812 | else if (date == at_time) { | |
e5229042 SP |
1813 | if (get_sha1_hex(rec + 41, sha1)) |
1814 | die("Log %s is corrupt.", logfile); | |
e5f38ec3 JH |
1815 | } |
1816 | else { | |
e5229042 SP |
1817 | if (get_sha1_hex(rec + 41, logged_sha1)) |
1818 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1819 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1820 | warning("Log %s unexpectedly ended on %s.", |
73013afd | 1821 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 SP |
1822 | } |
1823 | } | |
dc49cd76 | 1824 | munmap(log_mapped, mapsz); |
d556fae2 SP |
1825 | return 0; |
1826 | } | |
e5229042 | 1827 | lastrec = rec; |
ab2a1a32 JH |
1828 | if (cnt > 0) |
1829 | cnt--; | |
d556fae2 SP |
1830 | } |
1831 | ||
e5229042 SP |
1832 | rec = logdata; |
1833 | while (rec < logend && *rec != '>' && *rec != '\n') | |
1834 | rec++; | |
1835 | if (rec == logend || *rec == '\n') | |
d556fae2 | 1836 | die("Log %s is corrupt.", logfile); |
e5229042 | 1837 | date = strtoul(rec + 1, &tz_c, 10); |
d556fae2 SP |
1838 | tz = strtoul(tz_c, NULL, 10); |
1839 | if (get_sha1_hex(logdata, sha1)) | |
1840 | die("Log %s is corrupt.", logfile); | |
d1a4489a JK |
1841 | if (is_null_sha1(sha1)) { |
1842 | if (get_sha1_hex(logdata + 41, sha1)) | |
1843 | die("Log %s is corrupt.", logfile); | |
1844 | } | |
16d7cc90 JH |
1845 | if (msg) |
1846 | *msg = ref_msg(logdata, logend); | |
dc49cd76 | 1847 | munmap(log_mapped, mapsz); |
16d7cc90 JH |
1848 | |
1849 | if (cutoff_time) | |
1850 | *cutoff_time = date; | |
1851 | if (cutoff_tz) | |
1852 | *cutoff_tz = tz; | |
1853 | if (cutoff_cnt) | |
1854 | *cutoff_cnt = reccnt; | |
1855 | return 1; | |
d556fae2 | 1856 | } |
2ff81662 | 1857 | |
dfefa935 | 1858 | int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long ofs, void *cb_data) |
2ff81662 JH |
1859 | { |
1860 | const char *logfile; | |
1861 | FILE *logfp; | |
8ca78803 | 1862 | struct strbuf sb = STRBUF_INIT; |
2266bf27 | 1863 | int ret = 0; |
2ff81662 | 1864 | |
dfefa935 | 1865 | logfile = git_path("logs/%s", refname); |
2ff81662 JH |
1866 | logfp = fopen(logfile, "r"); |
1867 | if (!logfp) | |
883d60fa | 1868 | return -1; |
101d15e0 JH |
1869 | |
1870 | if (ofs) { | |
1871 | struct stat statbuf; | |
1872 | if (fstat(fileno(logfp), &statbuf) || | |
1873 | statbuf.st_size < ofs || | |
1874 | fseek(logfp, -ofs, SEEK_END) || | |
8ca78803 | 1875 | strbuf_getwholeline(&sb, logfp, '\n')) { |
9d33f7c2 | 1876 | fclose(logfp); |
8ca78803 | 1877 | strbuf_release(&sb); |
101d15e0 | 1878 | return -1; |
9d33f7c2 | 1879 | } |
101d15e0 JH |
1880 | } |
1881 | ||
8ca78803 | 1882 | while (!strbuf_getwholeline(&sb, logfp, '\n')) { |
2ff81662 | 1883 | unsigned char osha1[20], nsha1[20]; |
883d60fa JS |
1884 | char *email_end, *message; |
1885 | unsigned long timestamp; | |
8ca78803 | 1886 | int tz; |
2ff81662 JH |
1887 | |
1888 | /* old SP new SP name <email> SP time TAB msg LF */ | |
8ca78803 RS |
1889 | if (sb.len < 83 || sb.buf[sb.len - 1] != '\n' || |
1890 | get_sha1_hex(sb.buf, osha1) || sb.buf[40] != ' ' || | |
1891 | get_sha1_hex(sb.buf + 41, nsha1) || sb.buf[81] != ' ' || | |
1892 | !(email_end = strchr(sb.buf + 82, '>')) || | |
883d60fa JS |
1893 | email_end[1] != ' ' || |
1894 | !(timestamp = strtoul(email_end + 2, &message, 10)) || | |
1895 | !message || message[0] != ' ' || | |
1896 | (message[1] != '+' && message[1] != '-') || | |
1897 | !isdigit(message[2]) || !isdigit(message[3]) || | |
b4dd4856 | 1898 | !isdigit(message[4]) || !isdigit(message[5])) |
2ff81662 | 1899 | continue; /* corrupt? */ |
883d60fa JS |
1900 | email_end[1] = '\0'; |
1901 | tz = strtol(message + 1, NULL, 10); | |
b4dd4856 JS |
1902 | if (message[6] != '\t') |
1903 | message += 6; | |
1904 | else | |
1905 | message += 7; | |
8ca78803 RS |
1906 | ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message, |
1907 | cb_data); | |
883d60fa | 1908 | if (ret) |
2266bf27 | 1909 | break; |
2ff81662 JH |
1910 | } |
1911 | fclose(logfp); | |
8ca78803 | 1912 | strbuf_release(&sb); |
2266bf27 | 1913 | return ret; |
2ff81662 | 1914 | } |
e29cb53a | 1915 | |
dfefa935 | 1916 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data) |
101d15e0 | 1917 | { |
dfefa935 | 1918 | return for_each_recent_reflog_ent(refname, fn, 0, cb_data); |
101d15e0 JH |
1919 | } |
1920 | ||
eb8381c8 NP |
1921 | static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data) |
1922 | { | |
1923 | DIR *dir = opendir(git_path("logs/%s", base)); | |
fcee5a14 | 1924 | int retval = 0; |
eb8381c8 NP |
1925 | |
1926 | if (dir) { | |
1927 | struct dirent *de; | |
1928 | int baselen = strlen(base); | |
1929 | char *log = xmalloc(baselen + 257); | |
1930 | ||
1931 | memcpy(log, base, baselen); | |
1932 | if (baselen && base[baselen-1] != '/') | |
1933 | log[baselen++] = '/'; | |
1934 | ||
1935 | while ((de = readdir(dir)) != NULL) { | |
1936 | struct stat st; | |
1937 | int namelen; | |
1938 | ||
1939 | if (de->d_name[0] == '.') | |
1940 | continue; | |
1941 | namelen = strlen(de->d_name); | |
1942 | if (namelen > 255) | |
1943 | continue; | |
1944 | if (has_extension(de->d_name, ".lock")) | |
1945 | continue; | |
1946 | memcpy(log + baselen, de->d_name, namelen+1); | |
1947 | if (stat(git_path("logs/%s", log), &st) < 0) | |
1948 | continue; | |
1949 | if (S_ISDIR(st.st_mode)) { | |
1950 | retval = do_for_each_reflog(log, fn, cb_data); | |
1951 | } else { | |
1952 | unsigned char sha1[20]; | |
c6893323 | 1953 | if (read_ref_full(log, sha1, 0, NULL)) |
eb8381c8 NP |
1954 | retval = error("bad ref for %s", log); |
1955 | else | |
1956 | retval = fn(log, sha1, 0, cb_data); | |
1957 | } | |
1958 | if (retval) | |
1959 | break; | |
1960 | } | |
1961 | free(log); | |
1962 | closedir(dir); | |
1963 | } | |
acb39f64 | 1964 | else if (*base) |
fcee5a14 | 1965 | return errno; |
eb8381c8 NP |
1966 | return retval; |
1967 | } | |
1968 | ||
1969 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
1970 | { | |
1971 | return do_for_each_reflog("", fn, cb_data); | |
1972 | } | |
3d9f037c CR |
1973 | |
1974 | int update_ref(const char *action, const char *refname, | |
1975 | const unsigned char *sha1, const unsigned char *oldval, | |
1976 | int flags, enum action_on_err onerr) | |
1977 | { | |
1978 | static struct ref_lock *lock; | |
1979 | lock = lock_any_ref_for_update(refname, oldval, flags); | |
1980 | if (!lock) { | |
1981 | const char *str = "Cannot lock the ref '%s'."; | |
1982 | switch (onerr) { | |
1983 | case MSG_ON_ERR: error(str, refname); break; | |
1984 | case DIE_ON_ERR: die(str, refname); break; | |
1985 | case QUIET_ON_ERR: break; | |
1986 | } | |
1987 | return 1; | |
1988 | } | |
1989 | if (write_ref_sha1(lock, sha1, action) < 0) { | |
1990 | const char *str = "Cannot update the ref '%s'."; | |
1991 | switch (onerr) { | |
1992 | case MSG_ON_ERR: error(str, refname); break; | |
1993 | case DIE_ON_ERR: die(str, refname); break; | |
1994 | case QUIET_ON_ERR: break; | |
1995 | } | |
1996 | return 1; | |
1997 | } | |
1998 | return 0; | |
1999 | } | |
cda69f48 | 2000 | |
2c5c66be | 2001 | int ref_exists(const char *refname) |
c17b2294 JH |
2002 | { |
2003 | unsigned char sha1[20]; | |
2004 | return !!resolve_ref(refname, sha1, 1, NULL); | |
2005 | } | |
2006 | ||
5483f799 | 2007 | struct ref *find_ref_by_name(const struct ref *list, const char *name) |
cda69f48 JK |
2008 | { |
2009 | for ( ; list; list = list->next) | |
2010 | if (!strcmp(list->name, name)) | |
5483f799 | 2011 | return (struct ref *)list; |
cda69f48 JK |
2012 | return NULL; |
2013 | } | |
7c2b3029 JK |
2014 | |
2015 | /* | |
2016 | * generate a format suitable for scanf from a ref_rev_parse_rules | |
2017 | * rule, that is replace the "%.*s" spec with a "%s" spec | |
2018 | */ | |
2019 | static void gen_scanf_fmt(char *scanf_fmt, const char *rule) | |
2020 | { | |
2021 | char *spec; | |
2022 | ||
2023 | spec = strstr(rule, "%.*s"); | |
2024 | if (!spec || strstr(spec + 4, "%.*s")) | |
2025 | die("invalid rule in ref_rev_parse_rules: %s", rule); | |
2026 | ||
2027 | /* copy all until spec */ | |
2028 | strncpy(scanf_fmt, rule, spec - rule); | |
2029 | scanf_fmt[spec - rule] = '\0'; | |
2030 | /* copy new spec */ | |
2031 | strcat(scanf_fmt, "%s"); | |
2032 | /* copy remaining rule */ | |
2033 | strcat(scanf_fmt, spec + 4); | |
2034 | ||
2035 | return; | |
2036 | } | |
2037 | ||
dfefa935 | 2038 | char *shorten_unambiguous_ref(const char *refname, int strict) |
7c2b3029 JK |
2039 | { |
2040 | int i; | |
2041 | static char **scanf_fmts; | |
2042 | static int nr_rules; | |
2043 | char *short_name; | |
2044 | ||
2045 | /* pre generate scanf formats from ref_rev_parse_rules[] */ | |
2046 | if (!nr_rules) { | |
2047 | size_t total_len = 0; | |
2048 | ||
2049 | /* the rule list is NULL terminated, count them first */ | |
2050 | for (; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
2051 | /* no +1 because strlen("%s") < strlen("%.*s") */ | |
2052 | total_len += strlen(ref_rev_parse_rules[nr_rules]); | |
2053 | ||
2054 | scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); | |
2055 | ||
2056 | total_len = 0; | |
2057 | for (i = 0; i < nr_rules; i++) { | |
2058 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] | |
2059 | + total_len; | |
2060 | gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); | |
2061 | total_len += strlen(ref_rev_parse_rules[i]); | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | /* bail out if there are no rules */ | |
2066 | if (!nr_rules) | |
dfefa935 | 2067 | return xstrdup(refname); |
7c2b3029 | 2068 | |
dfefa935 MH |
2069 | /* buffer for scanf result, at most refname must fit */ |
2070 | short_name = xstrdup(refname); | |
7c2b3029 JK |
2071 | |
2072 | /* skip first rule, it will always match */ | |
2073 | for (i = nr_rules - 1; i > 0 ; --i) { | |
2074 | int j; | |
6e7b3309 | 2075 | int rules_to_fail = i; |
7c2b3029 JK |
2076 | int short_name_len; |
2077 | ||
dfefa935 | 2078 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) |
7c2b3029 JK |
2079 | continue; |
2080 | ||
2081 | short_name_len = strlen(short_name); | |
2082 | ||
6e7b3309 BW |
2083 | /* |
2084 | * in strict mode, all (except the matched one) rules | |
2085 | * must fail to resolve to a valid non-ambiguous ref | |
2086 | */ | |
2087 | if (strict) | |
2088 | rules_to_fail = nr_rules; | |
2089 | ||
7c2b3029 JK |
2090 | /* |
2091 | * check if the short name resolves to a valid ref, | |
2092 | * but use only rules prior to the matched one | |
2093 | */ | |
6e7b3309 | 2094 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 | 2095 | const char *rule = ref_rev_parse_rules[j]; |
7c2b3029 JK |
2096 | char refname[PATH_MAX]; |
2097 | ||
6e7b3309 BW |
2098 | /* skip matched rule */ |
2099 | if (i == j) | |
2100 | continue; | |
2101 | ||
7c2b3029 JK |
2102 | /* |
2103 | * the short name is ambiguous, if it resolves | |
2104 | * (with this previous rule) to a valid ref | |
2105 | * read_ref() returns 0 on success | |
2106 | */ | |
2107 | mksnpath(refname, sizeof(refname), | |
2108 | rule, short_name_len, short_name); | |
c6893323 | 2109 | if (ref_exists(refname)) |
7c2b3029 JK |
2110 | break; |
2111 | } | |
2112 | ||
2113 | /* | |
2114 | * short name is non-ambiguous if all previous rules | |
2115 | * haven't resolved to a valid ref | |
2116 | */ | |
6e7b3309 | 2117 | if (j == rules_to_fail) |
7c2b3029 JK |
2118 | return short_name; |
2119 | } | |
2120 | ||
2121 | free(short_name); | |
dfefa935 | 2122 | return xstrdup(refname); |
7c2b3029 | 2123 | } |