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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 | |
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 | ||
6af1038b | 56 | /* Add a ref_entry to the end of the ref_array (unsorted). */ |
dfefa935 | 57 | static void add_ref(const char *refname, const unsigned char *sha1, |
09116a1c | 58 | int flag, int check_name, struct ref_array *refs, |
e9c4c111 | 59 | struct ref_entry **new_entry) |
e1e22e37 LT |
60 | { |
61 | int len; | |
e9c4c111 | 62 | struct ref_entry *entry; |
e1e22e37 LT |
63 | |
64 | /* Allocate it and add it in.. */ | |
dfefa935 | 65 | len = strlen(refname) + 1; |
e9c4c111 | 66 | entry = xmalloc(sizeof(struct ref_entry) + len); |
e1e22e37 | 67 | hashcpy(entry->sha1, sha1); |
f4204ab9 | 68 | hashclr(entry->peeled); |
09116a1c | 69 | if (check_name && |
dfefa935 MH |
70 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL|REFNAME_DOT_COMPONENT)) |
71 | die("Reference has invalid format: '%s'", refname); | |
72 | memcpy(entry->name, refname, len); | |
8da19775 | 73 | entry->flag = flag; |
f4204ab9 JH |
74 | if (new_entry) |
75 | *new_entry = entry; | |
e9c4c111 JP |
76 | ALLOC_GROW(refs->refs, refs->nr + 1, refs->alloc); |
77 | refs->refs[refs->nr++] = entry; | |
c774aab9 JP |
78 | } |
79 | ||
e9c4c111 | 80 | static int ref_entry_cmp(const void *a, const void *b) |
c774aab9 | 81 | { |
e9c4c111 JP |
82 | struct ref_entry *one = *(struct ref_entry **)a; |
83 | struct ref_entry *two = *(struct ref_entry **)b; | |
84 | return strcmp(one->name, two->name); | |
85 | } | |
c774aab9 | 86 | |
e9c4c111 JP |
87 | static void sort_ref_array(struct ref_array *array) |
88 | { | |
89 | int i = 0, j = 1; | |
c774aab9 | 90 | |
e9c4c111 JP |
91 | /* Nothing to sort unless there are at least two entries */ |
92 | if (array->nr < 2) | |
93 | return; | |
c774aab9 | 94 | |
e9c4c111 | 95 | qsort(array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp); |
c774aab9 | 96 | |
e9c4c111 JP |
97 | /* Remove any duplicates from the ref_array */ |
98 | for (; j < array->nr; j++) { | |
99 | struct ref_entry *a = array->refs[i]; | |
100 | struct ref_entry *b = array->refs[j]; | |
101 | if (!strcmp(a->name, b->name)) { | |
102 | if (hashcmp(a->sha1, b->sha1)) | |
103 | die("Duplicated ref, and SHA1s don't match: %s", | |
104 | a->name); | |
105 | warning("Duplicated ref: %s", a->name); | |
17d68a54 | 106 | free(b); |
e9c4c111 JP |
107 | continue; |
108 | } | |
109 | i++; | |
110 | array->refs[i] = array->refs[j]; | |
111 | } | |
112 | array->nr = i + 1; | |
113 | } | |
c774aab9 | 114 | |
dfefa935 | 115 | static struct ref_entry *search_ref_array(struct ref_array *array, const char *refname) |
e9c4c111 JP |
116 | { |
117 | struct ref_entry *e, **r; | |
118 | int len; | |
c774aab9 | 119 | |
dfefa935 | 120 | if (refname == NULL) |
e9c4c111 | 121 | return NULL; |
c774aab9 | 122 | |
68729696 BC |
123 | if (!array->nr) |
124 | return NULL; | |
c774aab9 | 125 | |
dfefa935 | 126 | len = strlen(refname) + 1; |
e9c4c111 | 127 | e = xmalloc(sizeof(struct ref_entry) + len); |
dfefa935 | 128 | memcpy(e->name, refname, len); |
c774aab9 | 129 | |
e9c4c111 | 130 | r = bsearch(&e, array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp); |
c774aab9 | 131 | |
e9c4c111 | 132 | free(e); |
c774aab9 | 133 | |
e9c4c111 JP |
134 | if (r == NULL) |
135 | return NULL; | |
c774aab9 | 136 | |
e9c4c111 | 137 | return *r; |
e1e22e37 LT |
138 | } |
139 | ||
5e290ff7 JH |
140 | /* |
141 | * Future: need to be in "struct repository" | |
142 | * when doing a full libification. | |
143 | */ | |
79c7ca54 MH |
144 | static struct ref_cache { |
145 | struct ref_cache *next; | |
5e290ff7 JH |
146 | char did_loose; |
147 | char did_packed; | |
e9c4c111 JP |
148 | struct ref_array loose; |
149 | struct ref_array packed; | |
ce40979c MH |
150 | /* The submodule name, or "" for the main repo. */ |
151 | char name[FLEX_ARRAY]; | |
79c7ca54 | 152 | } *ref_cache; |
0e88c130 | 153 | |
e9c4c111 | 154 | static struct ref_entry *current_ref; |
5e290ff7 | 155 | |
e9c4c111 | 156 | static struct ref_array extra_refs; |
e142a3c6 | 157 | |
7c59511e | 158 | static void clear_ref_array(struct ref_array *array) |
5e290ff7 | 159 | { |
e9c4c111 JP |
160 | int i; |
161 | for (i = 0; i < array->nr; i++) | |
162 | free(array->refs[i]); | |
163 | free(array->refs); | |
164 | array->nr = array->alloc = 0; | |
165 | array->refs = NULL; | |
5e290ff7 JH |
166 | } |
167 | ||
760c4512 | 168 | static void clear_packed_ref_cache(struct ref_cache *refs) |
e1e22e37 | 169 | { |
1b7edaf9 | 170 | if (refs->did_packed) |
7c59511e | 171 | clear_ref_array(&refs->packed); |
760c4512 | 172 | refs->did_packed = 0; |
5e290ff7 | 173 | } |
e1e22e37 | 174 | |
760c4512 MH |
175 | static void clear_loose_ref_cache(struct ref_cache *refs) |
176 | { | |
177 | if (refs->did_loose) | |
7c59511e | 178 | clear_ref_array(&refs->loose); |
760c4512 MH |
179 | refs->did_loose = 0; |
180 | } | |
181 | ||
79c7ca54 | 182 | static struct ref_cache *create_ref_cache(const char *submodule) |
e5dbf605 | 183 | { |
ce40979c | 184 | int len; |
79c7ca54 | 185 | struct ref_cache *refs; |
ce40979c MH |
186 | if (!submodule) |
187 | submodule = ""; | |
188 | len = strlen(submodule) + 1; | |
79c7ca54 | 189 | refs = xcalloc(1, sizeof(struct ref_cache) + len); |
ce40979c | 190 | memcpy(refs->name, submodule, len); |
e5dbf605 MH |
191 | return refs; |
192 | } | |
193 | ||
4349a668 | 194 | /* |
79c7ca54 | 195 | * Return a pointer to a ref_cache for the specified submodule. For |
4349a668 MH |
196 | * the main repository, use submodule==NULL. The returned structure |
197 | * will be allocated and initialized but not necessarily populated; it | |
198 | * should not be freed. | |
199 | */ | |
79c7ca54 | 200 | static struct ref_cache *get_ref_cache(const char *submodule) |
4349a668 | 201 | { |
79c7ca54 | 202 | struct ref_cache *refs = ref_cache; |
0e88c130 MH |
203 | if (!submodule) |
204 | submodule = ""; | |
205 | while (refs) { | |
206 | if (!strcmp(submodule, refs->name)) | |
207 | return refs; | |
208 | refs = refs->next; | |
4349a668 | 209 | } |
0e88c130 | 210 | |
79c7ca54 MH |
211 | refs = create_ref_cache(submodule); |
212 | refs->next = ref_cache; | |
213 | ref_cache = refs; | |
0e88c130 | 214 | return refs; |
4349a668 MH |
215 | } |
216 | ||
8be8bde7 | 217 | void invalidate_ref_cache(const char *submodule) |
f130b116 | 218 | { |
c5f29abd MH |
219 | struct ref_cache *refs = get_ref_cache(submodule); |
220 | clear_packed_ref_cache(refs); | |
221 | clear_loose_ref_cache(refs); | |
5e290ff7 | 222 | } |
e1e22e37 | 223 | |
2c5c66be | 224 | static void read_packed_refs(FILE *f, struct ref_array *array) |
f4204ab9 | 225 | { |
e9c4c111 | 226 | struct ref_entry *last = NULL; |
f4204ab9 JH |
227 | char refline[PATH_MAX]; |
228 | int flag = REF_ISPACKED; | |
229 | ||
230 | while (fgets(refline, sizeof(refline), f)) { | |
231 | unsigned char sha1[20]; | |
dfefa935 | 232 | const char *refname; |
f4204ab9 JH |
233 | static const char header[] = "# pack-refs with:"; |
234 | ||
235 | if (!strncmp(refline, header, sizeof(header)-1)) { | |
236 | const char *traits = refline + sizeof(header) - 1; | |
237 | if (strstr(traits, " peeled ")) | |
238 | flag |= REF_KNOWS_PEELED; | |
239 | /* perhaps other traits later as well */ | |
240 | continue; | |
241 | } | |
242 | ||
dfefa935 MH |
243 | refname = parse_ref_line(refline, sha1); |
244 | if (refname) { | |
245 | add_ref(refname, sha1, flag, 1, array, &last); | |
f4204ab9 JH |
246 | continue; |
247 | } | |
248 | if (last && | |
249 | refline[0] == '^' && | |
250 | strlen(refline) == 42 && | |
251 | refline[41] == '\n' && | |
252 | !get_sha1_hex(refline + 1, sha1)) | |
253 | hashcpy(last->peeled, sha1); | |
254 | } | |
2c5c66be | 255 | sort_ref_array(array); |
f4204ab9 JH |
256 | } |
257 | ||
dfefa935 | 258 | void add_extra_ref(const char *refname, const unsigned char *sha1, int flag) |
e142a3c6 | 259 | { |
dfefa935 | 260 | add_ref(refname, sha1, flag, 0, &extra_refs, NULL); |
e142a3c6 DB |
261 | } |
262 | ||
263 | void clear_extra_refs(void) | |
264 | { | |
7c59511e | 265 | clear_ref_array(&extra_refs); |
e142a3c6 DB |
266 | } |
267 | ||
e9c4c111 | 268 | static struct ref_array *get_packed_refs(const char *submodule) |
5e290ff7 | 269 | { |
79c7ca54 | 270 | struct ref_cache *refs = get_ref_cache(submodule); |
0bad611b | 271 | |
4349a668 MH |
272 | if (!refs->did_packed) { |
273 | const char *packed_refs_file; | |
274 | FILE *f; | |
0bad611b | 275 | |
4349a668 MH |
276 | if (submodule) |
277 | packed_refs_file = git_path_submodule(submodule, "packed-refs"); | |
278 | else | |
279 | packed_refs_file = git_path("packed-refs"); | |
280 | f = fopen(packed_refs_file, "r"); | |
e1e22e37 | 281 | if (f) { |
2c5c66be | 282 | read_packed_refs(f, &refs->packed); |
e1e22e37 | 283 | fclose(f); |
e1e22e37 | 284 | } |
0bad611b | 285 | refs->did_packed = 1; |
e1e22e37 | 286 | } |
e9c4c111 | 287 | return &refs->packed; |
e1e22e37 LT |
288 | } |
289 | ||
e9c4c111 JP |
290 | static void get_ref_dir(const char *submodule, const char *base, |
291 | struct ref_array *array) | |
e1e22e37 | 292 | { |
0bad611b HV |
293 | DIR *dir; |
294 | const char *path; | |
295 | ||
296 | if (submodule) | |
297 | path = git_path_submodule(submodule, "%s", base); | |
298 | else | |
299 | path = git_path("%s", base); | |
300 | ||
301 | ||
302 | dir = opendir(path); | |
e1e22e37 LT |
303 | |
304 | if (dir) { | |
305 | struct dirent *de; | |
306 | int baselen = strlen(base); | |
dfefa935 | 307 | char *refname = xmalloc(baselen + 257); |
e1e22e37 | 308 | |
dfefa935 | 309 | memcpy(refname, base, baselen); |
e1e22e37 | 310 | if (baselen && base[baselen-1] != '/') |
dfefa935 | 311 | refname[baselen++] = '/'; |
e1e22e37 LT |
312 | |
313 | while ((de = readdir(dir)) != NULL) { | |
314 | unsigned char sha1[20]; | |
315 | struct stat st; | |
8da19775 | 316 | int flag; |
e1e22e37 | 317 | int namelen; |
0bad611b | 318 | const char *refdir; |
e1e22e37 LT |
319 | |
320 | if (de->d_name[0] == '.') | |
321 | continue; | |
322 | namelen = strlen(de->d_name); | |
323 | if (namelen > 255) | |
324 | continue; | |
325 | if (has_extension(de->d_name, ".lock")) | |
326 | continue; | |
dfefa935 | 327 | memcpy(refname + baselen, de->d_name, namelen+1); |
0bad611b | 328 | refdir = submodule |
dfefa935 MH |
329 | ? git_path_submodule(submodule, "%s", refname) |
330 | : git_path("%s", refname); | |
0bad611b | 331 | if (stat(refdir, &st) < 0) |
e1e22e37 LT |
332 | continue; |
333 | if (S_ISDIR(st.st_mode)) { | |
dfefa935 | 334 | get_ref_dir(submodule, refname, array); |
e1e22e37 LT |
335 | continue; |
336 | } | |
0bad611b | 337 | if (submodule) { |
f8948e2f | 338 | hashclr(sha1); |
0bad611b | 339 | flag = 0; |
dfefa935 | 340 | if (resolve_gitlink_ref(submodule, refname, sha1) < 0) { |
0bad611b | 341 | hashclr(sha1); |
98ac34b2 | 342 | flag |= REF_ISBROKEN; |
0bad611b | 343 | } |
dfefa935 | 344 | } else if (read_ref_full(refname, sha1, 1, &flag)) { |
09116a1c JH |
345 | hashclr(sha1); |
346 | flag |= REF_ISBROKEN; | |
347 | } | |
dfefa935 | 348 | add_ref(refname, sha1, flag, 1, array, NULL); |
e1e22e37 | 349 | } |
dfefa935 | 350 | free(refname); |
e1e22e37 LT |
351 | closedir(dir); |
352 | } | |
e1e22e37 LT |
353 | } |
354 | ||
f8948e2f | 355 | struct warn_if_dangling_data { |
3cf6134a | 356 | FILE *fp; |
f8948e2f JH |
357 | const char *refname; |
358 | const char *msg_fmt; | |
359 | }; | |
360 | ||
361 | static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1, | |
362 | int flags, void *cb_data) | |
363 | { | |
364 | struct warn_if_dangling_data *d = cb_data; | |
365 | const char *resolves_to; | |
366 | unsigned char junk[20]; | |
367 | ||
368 | if (!(flags & REF_ISSYMREF)) | |
369 | return 0; | |
370 | ||
371 | resolves_to = resolve_ref(refname, junk, 0, NULL); | |
372 | if (!resolves_to || strcmp(resolves_to, d->refname)) | |
373 | return 0; | |
374 | ||
3cf6134a | 375 | fprintf(d->fp, d->msg_fmt, refname); |
f8948e2f JH |
376 | return 0; |
377 | } | |
378 | ||
3cf6134a | 379 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f8948e2f | 380 | { |
66dbfd55 GV |
381 | struct warn_if_dangling_data data; |
382 | ||
383 | data.fp = fp; | |
384 | data.refname = refname; | |
385 | data.msg_fmt = msg_fmt; | |
f8948e2f JH |
386 | for_each_rawref(warn_if_dangling_symref, &data); |
387 | } | |
388 | ||
e9c4c111 | 389 | static struct ref_array *get_loose_refs(const char *submodule) |
e1e22e37 | 390 | { |
79c7ca54 | 391 | struct ref_cache *refs = get_ref_cache(submodule); |
0bad611b | 392 | |
4349a668 | 393 | if (!refs->did_loose) { |
2c5c66be JH |
394 | get_ref_dir(submodule, "refs", &refs->loose); |
395 | sort_ref_array(&refs->loose); | |
4349a668 | 396 | refs->did_loose = 1; |
e1e22e37 | 397 | } |
2c5c66be | 398 | return &refs->loose; |
e1e22e37 LT |
399 | } |
400 | ||
ca8db142 LT |
401 | /* We allow "recursive" symbolic refs. Only within reason, though */ |
402 | #define MAXDEPTH 5 | |
0ebde32c LT |
403 | #define MAXREFLEN (1024) |
404 | ||
e5fa45c1 JH |
405 | /* |
406 | * Called by resolve_gitlink_ref_recursive() after it failed to read | |
407 | * from "name", which is "module/.git/<refname>". Find <refname> in | |
408 | * the packed-refs file for the submodule. | |
409 | */ | |
dfefa935 | 410 | static int resolve_gitlink_packed_ref(char *name, int pathlen, |
85be1fe3 | 411 | const char *refname, unsigned char *sha1) |
0ebde32c | 412 | { |
e9c4c111 | 413 | int retval = -1; |
2c5c66be | 414 | struct ref_entry *ref; |
e5fa45c1 | 415 | struct ref_array *array; |
0ebde32c | 416 | |
e5fa45c1 JH |
417 | /* being defensive: resolve_gitlink_ref() did this for us */ |
418 | if (pathlen < 6 || memcmp(name + pathlen - 6, "/.git/", 6)) | |
419 | die("Oops"); | |
420 | name[pathlen - 6] = '\0'; /* make it path to the submodule */ | |
421 | array = get_packed_refs(name); | |
2c5c66be | 422 | ref = search_ref_array(array, refname); |
e9c4c111 | 423 | if (ref != NULL) { |
85be1fe3 | 424 | memcpy(sha1, ref->sha1, 20); |
e9c4c111 | 425 | retval = 0; |
0ebde32c | 426 | } |
0ebde32c LT |
427 | return retval; |
428 | } | |
429 | ||
dfefa935 | 430 | static int resolve_gitlink_ref_recursive(char *name, int pathlen, |
85be1fe3 | 431 | const char *refname, unsigned char *sha1, |
dfefa935 | 432 | int recursion) |
0ebde32c LT |
433 | { |
434 | int fd, len = strlen(refname); | |
435 | char buffer[128], *p; | |
436 | ||
437 | if (recursion > MAXDEPTH || len > MAXREFLEN) | |
438 | return -1; | |
439 | memcpy(name + pathlen, refname, len+1); | |
440 | fd = open(name, O_RDONLY); | |
441 | if (fd < 0) | |
85be1fe3 | 442 | return resolve_gitlink_packed_ref(name, pathlen, refname, sha1); |
0ebde32c LT |
443 | |
444 | len = read(fd, buffer, sizeof(buffer)-1); | |
445 | close(fd); | |
446 | if (len < 0) | |
447 | return -1; | |
448 | while (len && isspace(buffer[len-1])) | |
449 | len--; | |
450 | buffer[len] = 0; | |
451 | ||
452 | /* Was it a detached head or an old-fashioned symlink? */ | |
85be1fe3 | 453 | if (!get_sha1_hex(buffer, sha1)) |
0ebde32c LT |
454 | return 0; |
455 | ||
456 | /* Symref? */ | |
457 | if (strncmp(buffer, "ref:", 4)) | |
458 | return -1; | |
459 | p = buffer + 4; | |
460 | while (isspace(*p)) | |
461 | p++; | |
462 | ||
85be1fe3 | 463 | return resolve_gitlink_ref_recursive(name, pathlen, p, sha1, recursion+1); |
0ebde32c LT |
464 | } |
465 | ||
85be1fe3 | 466 | int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1) |
0ebde32c LT |
467 | { |
468 | int len = strlen(path), retval; | |
469 | char *gitdir; | |
842abf06 | 470 | const char *tmp; |
0ebde32c LT |
471 | |
472 | while (len && path[len-1] == '/') | |
473 | len--; | |
474 | if (!len) | |
475 | return -1; | |
476 | gitdir = xmalloc(len + MAXREFLEN + 8); | |
477 | memcpy(gitdir, path, len); | |
842abf06 LH |
478 | memcpy(gitdir + len, "/.git", 6); |
479 | len += 5; | |
480 | ||
13d6ec91 | 481 | tmp = read_gitfile(gitdir); |
842abf06 LH |
482 | if (tmp) { |
483 | free(gitdir); | |
484 | len = strlen(tmp); | |
485 | gitdir = xmalloc(len + MAXREFLEN + 3); | |
486 | memcpy(gitdir, tmp, len); | |
487 | } | |
488 | gitdir[len] = '/'; | |
489 | gitdir[++len] = '\0'; | |
85be1fe3 | 490 | retval = resolve_gitlink_ref_recursive(gitdir, len, refname, sha1, 0); |
0ebde32c LT |
491 | free(gitdir); |
492 | return retval; | |
493 | } | |
ca8db142 | 494 | |
4886b89f | 495 | /* |
c224ca7f MH |
496 | * Try to read ref from the packed references. On success, set sha1 |
497 | * and return 0; otherwise, return -1. | |
4886b89f | 498 | */ |
dfefa935 | 499 | static int get_packed_ref(const char *refname, unsigned char *sha1) |
c224ca7f | 500 | { |
2c5c66be | 501 | struct ref_array *packed = get_packed_refs(NULL); |
dfefa935 | 502 | struct ref_entry *entry = search_ref_array(packed, refname); |
2c5c66be JH |
503 | if (entry) { |
504 | hashcpy(sha1, entry->sha1); | |
505 | return 0; | |
c224ca7f MH |
506 | } |
507 | return -1; | |
508 | } | |
509 | ||
dfefa935 | 510 | const char *resolve_ref(const char *refname, unsigned char *sha1, int reading, int *flag) |
8a65ff76 | 511 | { |
0104ca09 HO |
512 | int depth = MAXDEPTH; |
513 | ssize_t len; | |
a876ed83 | 514 | char buffer[256]; |
dfefa935 | 515 | static char refname_buffer[256]; |
ca8db142 | 516 | |
8da19775 JH |
517 | if (flag) |
518 | *flag = 0; | |
519 | ||
dfefa935 | 520 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) |
8384d788 MH |
521 | return NULL; |
522 | ||
a876ed83 | 523 | for (;;) { |
55956350 | 524 | char path[PATH_MAX]; |
a876ed83 JH |
525 | struct stat st; |
526 | char *buf; | |
527 | int fd; | |
8a65ff76 | 528 | |
a876ed83 JH |
529 | if (--depth < 0) |
530 | return NULL; | |
ca8db142 | 531 | |
dfefa935 | 532 | git_snpath(path, sizeof(path), "%s", refname); |
c224ca7f | 533 | |
a876ed83 | 534 | if (lstat(path, &st) < 0) { |
c224ca7f MH |
535 | if (errno != ENOENT) |
536 | return NULL; | |
537 | /* | |
538 | * The loose reference file does not exist; | |
539 | * check for a packed reference. | |
540 | */ | |
dfefa935 | 541 | if (!get_packed_ref(refname, sha1)) { |
c224ca7f MH |
542 | if (flag) |
543 | *flag |= REF_ISPACKED; | |
dfefa935 | 544 | return refname; |
434cd0cd | 545 | } |
c224ca7f MH |
546 | /* The reference is not a packed reference, either. */ |
547 | if (reading) { | |
a876ed83 | 548 | return NULL; |
c224ca7f MH |
549 | } else { |
550 | hashclr(sha1); | |
dfefa935 | 551 | return refname; |
c224ca7f | 552 | } |
a876ed83 | 553 | } |
ca8db142 | 554 | |
a876ed83 JH |
555 | /* Follow "normalized" - ie "refs/.." symlinks by hand */ |
556 | if (S_ISLNK(st.st_mode)) { | |
557 | len = readlink(path, buffer, sizeof(buffer)-1); | |
7bb2bf8e MH |
558 | if (len < 0) |
559 | return NULL; | |
b54cb795 | 560 | buffer[len] = 0; |
1f58a038 MH |
561 | if (!prefixcmp(buffer, "refs/") && |
562 | !check_refname_format(buffer, 0)) { | |
dfefa935 MH |
563 | strcpy(refname_buffer, buffer); |
564 | refname = refname_buffer; | |
8da19775 JH |
565 | if (flag) |
566 | *flag |= REF_ISSYMREF; | |
a876ed83 JH |
567 | continue; |
568 | } | |
ca8db142 | 569 | } |
a876ed83 | 570 | |
7a21632f DS |
571 | /* Is it a directory? */ |
572 | if (S_ISDIR(st.st_mode)) { | |
573 | errno = EISDIR; | |
574 | return NULL; | |
575 | } | |
576 | ||
a876ed83 JH |
577 | /* |
578 | * Anything else, just open it and try to use it as | |
579 | * a ref | |
580 | */ | |
581 | fd = open(path, O_RDONLY); | |
582 | if (fd < 0) | |
583 | return NULL; | |
93d26e4c | 584 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
a876ed83 | 585 | close(fd); |
28775050 MH |
586 | if (len < 0) |
587 | return NULL; | |
588 | while (len && isspace(buffer[len-1])) | |
589 | len--; | |
590 | buffer[len] = '\0'; | |
a876ed83 JH |
591 | |
592 | /* | |
593 | * Is it a symbolic ref? | |
594 | */ | |
28775050 | 595 | if (prefixcmp(buffer, "ref:")) |
a876ed83 | 596 | break; |
55956350 JH |
597 | if (flag) |
598 | *flag |= REF_ISSYMREF; | |
a876ed83 | 599 | buf = buffer + 4; |
28775050 MH |
600 | while (isspace(*buf)) |
601 | buf++; | |
313fb010 | 602 | if (check_refname_format(buf, REFNAME_ALLOW_ONELEVEL)) { |
55956350 JH |
603 | if (flag) |
604 | *flag |= REF_ISBROKEN; | |
313fb010 MH |
605 | return NULL; |
606 | } | |
dfefa935 | 607 | refname = strcpy(refname_buffer, buf); |
8a65ff76 | 608 | } |
f989fea0 MH |
609 | /* Please note that FETCH_HEAD has a second line containing other data. */ |
610 | if (get_sha1_hex(buffer, sha1) || (buffer[40] != '\0' && !isspace(buffer[40]))) { | |
55956350 JH |
611 | if (flag) |
612 | *flag |= REF_ISBROKEN; | |
a876ed83 | 613 | return NULL; |
629cd3ac | 614 | } |
dfefa935 | 615 | return refname; |
a876ed83 JH |
616 | } |
617 | ||
d08bae7e IL |
618 | /* The argument to filter_refs */ |
619 | struct ref_filter { | |
620 | const char *pattern; | |
621 | each_ref_fn *fn; | |
622 | void *cb_data; | |
623 | }; | |
624 | ||
dfefa935 | 625 | int read_ref_full(const char *refname, unsigned char *sha1, int reading, int *flags) |
a876ed83 | 626 | { |
dfefa935 | 627 | if (resolve_ref(refname, sha1, reading, flags)) |
a876ed83 JH |
628 | return 0; |
629 | return -1; | |
8a65ff76 LT |
630 | } |
631 | ||
dfefa935 | 632 | int read_ref(const char *refname, unsigned char *sha1) |
c6893323 | 633 | { |
dfefa935 | 634 | return read_ref_full(refname, sha1, 1, NULL); |
c6893323 NTND |
635 | } |
636 | ||
f8948e2f | 637 | #define DO_FOR_EACH_INCLUDE_BROKEN 01 |
ef06b918 | 638 | static int do_one_ref(const char *base, each_ref_fn fn, int trim, |
e9c4c111 | 639 | int flags, void *cb_data, struct ref_entry *entry) |
ef06b918 | 640 | { |
b3cfc406 | 641 | if (prefixcmp(entry->name, base)) |
ef06b918 | 642 | return 0; |
e01de1c9 | 643 | |
f8948e2f | 644 | if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { |
98ac34b2 JH |
645 | if (entry->flag & REF_ISBROKEN) |
646 | return 0; /* ignore broken refs e.g. dangling symref */ | |
f8948e2f JH |
647 | if (!has_sha1_file(entry->sha1)) { |
648 | error("%s does not point to a valid object!", entry->name); | |
649 | return 0; | |
650 | } | |
ef06b918 | 651 | } |
0ae91be0 | 652 | current_ref = entry; |
ef06b918 JH |
653 | return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); |
654 | } | |
655 | ||
85be1fe3 | 656 | static int filter_refs(const char *refname, const unsigned char *sha1, int flags, |
dfefa935 | 657 | void *data) |
d08bae7e IL |
658 | { |
659 | struct ref_filter *filter = (struct ref_filter *)data; | |
dfefa935 | 660 | if (fnmatch(filter->pattern, refname, 0)) |
d08bae7e | 661 | return 0; |
85be1fe3 | 662 | return filter->fn(refname, sha1, flags, filter->cb_data); |
d08bae7e IL |
663 | } |
664 | ||
dfefa935 | 665 | int peel_ref(const char *refname, unsigned char *sha1) |
cf0adba7 JH |
666 | { |
667 | int flag; | |
668 | unsigned char base[20]; | |
669 | struct object *o; | |
670 | ||
dfefa935 MH |
671 | if (current_ref && (current_ref->name == refname |
672 | || !strcmp(current_ref->name, refname))) { | |
0ae91be0 SP |
673 | if (current_ref->flag & REF_KNOWS_PEELED) { |
674 | hashcpy(sha1, current_ref->peeled); | |
675 | return 0; | |
676 | } | |
677 | hashcpy(base, current_ref->sha1); | |
678 | goto fallback; | |
679 | } | |
680 | ||
dfefa935 | 681 | if (read_ref_full(refname, base, 1, &flag)) |
cf0adba7 JH |
682 | return -1; |
683 | ||
684 | if ((flag & REF_ISPACKED)) { | |
e9c4c111 | 685 | struct ref_array *array = get_packed_refs(NULL); |
dfefa935 | 686 | struct ref_entry *r = search_ref_array(array, refname); |
cf0adba7 | 687 | |
e9c4c111 JP |
688 | if (r != NULL && r->flag & REF_KNOWS_PEELED) { |
689 | hashcpy(sha1, r->peeled); | |
690 | return 0; | |
cf0adba7 | 691 | } |
cf0adba7 JH |
692 | } |
693 | ||
0ae91be0 | 694 | fallback: |
cf0adba7 | 695 | o = parse_object(base); |
8c87dc77 | 696 | if (o && o->type == OBJ_TAG) { |
dfefa935 | 697 | o = deref_tag(o, refname, 0); |
cf0adba7 JH |
698 | if (o) { |
699 | hashcpy(sha1, o->sha1); | |
700 | return 0; | |
701 | } | |
702 | } | |
703 | return -1; | |
704 | } | |
705 | ||
0bad611b HV |
706 | static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn, |
707 | int trim, int flags, void *cb_data) | |
8a65ff76 | 708 | { |
e9c4c111 JP |
709 | int retval = 0, i, p = 0, l = 0; |
710 | struct ref_array *packed = get_packed_refs(submodule); | |
711 | struct ref_array *loose = get_loose_refs(submodule); | |
8a65ff76 | 712 | |
e9c4c111 | 713 | struct ref_array *extra = &extra_refs; |
e142a3c6 | 714 | |
e9c4c111 JP |
715 | for (i = 0; i < extra->nr; i++) |
716 | retval = do_one_ref(base, fn, trim, flags, cb_data, extra->refs[i]); | |
e142a3c6 | 717 | |
e9c4c111 JP |
718 | while (p < packed->nr && l < loose->nr) { |
719 | struct ref_entry *entry; | |
720 | int cmp = strcmp(packed->refs[p]->name, loose->refs[l]->name); | |
e1e22e37 | 721 | if (!cmp) { |
e9c4c111 | 722 | p++; |
e1e22e37 | 723 | continue; |
6cada6a9 | 724 | } |
e1e22e37 | 725 | if (cmp > 0) { |
e9c4c111 | 726 | entry = loose->refs[l++]; |
e1e22e37 | 727 | } else { |
e9c4c111 | 728 | entry = packed->refs[p++]; |
e1e22e37 | 729 | } |
f8948e2f | 730 | retval = do_one_ref(base, fn, trim, flags, cb_data, entry); |
e1e22e37 | 731 | if (retval) |
0ae91be0 | 732 | goto end_each; |
e1e22e37 | 733 | } |
8a65ff76 | 734 | |
e9c4c111 JP |
735 | if (l < loose->nr) { |
736 | p = l; | |
737 | packed = loose; | |
738 | } | |
739 | ||
740 | for (; p < packed->nr; p++) { | |
741 | retval = do_one_ref(base, fn, trim, flags, cb_data, packed->refs[p]); | |
ef06b918 | 742 | if (retval) |
0ae91be0 | 743 | goto end_each; |
8a65ff76 | 744 | } |
0ae91be0 SP |
745 | |
746 | end_each: | |
747 | current_ref = NULL; | |
748 | return retval; | |
8a65ff76 LT |
749 | } |
750 | ||
0bad611b HV |
751 | |
752 | static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data) | |
723c31fe LT |
753 | { |
754 | unsigned char sha1[20]; | |
8da19775 JH |
755 | int flag; |
756 | ||
0bad611b HV |
757 | if (submodule) { |
758 | if (resolve_gitlink_ref(submodule, "HEAD", sha1) == 0) | |
759 | return fn("HEAD", sha1, 0, cb_data); | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
c6893323 | 764 | if (!read_ref_full("HEAD", sha1, 1, &flag)) |
8da19775 | 765 | return fn("HEAD", sha1, flag, cb_data); |
0bad611b | 766 | |
2f34ba32 | 767 | return 0; |
723c31fe LT |
768 | } |
769 | ||
0bad611b HV |
770 | int head_ref(each_ref_fn fn, void *cb_data) |
771 | { | |
772 | return do_head_ref(NULL, fn, cb_data); | |
773 | } | |
774 | ||
9ef6aeb0 HV |
775 | int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
776 | { | |
777 | return do_head_ref(submodule, fn, cb_data); | |
778 | } | |
779 | ||
cb5d709f | 780 | int for_each_ref(each_ref_fn fn, void *cb_data) |
8a65ff76 | 781 | { |
b3cfc406 | 782 | return do_for_each_ref(NULL, "", fn, 0, 0, cb_data); |
a62be77f SE |
783 | } |
784 | ||
9ef6aeb0 HV |
785 | int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
786 | { | |
b3cfc406 | 787 | return do_for_each_ref(submodule, "", fn, 0, 0, cb_data); |
a62be77f SE |
788 | } |
789 | ||
2a8177b6 CC |
790 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) |
791 | { | |
0bad611b | 792 | return do_for_each_ref(NULL, prefix, fn, strlen(prefix), 0, cb_data); |
2a8177b6 CC |
793 | } |
794 | ||
9ef6aeb0 HV |
795 | int for_each_ref_in_submodule(const char *submodule, const char *prefix, |
796 | each_ref_fn fn, void *cb_data) | |
797 | { | |
798 | return do_for_each_ref(submodule, prefix, fn, strlen(prefix), 0, cb_data); | |
2a8177b6 CC |
799 | } |
800 | ||
cb5d709f | 801 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 802 | { |
2a8177b6 | 803 | return for_each_ref_in("refs/tags/", fn, cb_data); |
a62be77f SE |
804 | } |
805 | ||
9ef6aeb0 HV |
806 | int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
807 | { | |
808 | return for_each_ref_in_submodule(submodule, "refs/tags/", fn, cb_data); | |
809 | } | |
810 | ||
cb5d709f | 811 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 812 | { |
2a8177b6 | 813 | return for_each_ref_in("refs/heads/", fn, cb_data); |
a62be77f SE |
814 | } |
815 | ||
9ef6aeb0 HV |
816 | int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
817 | { | |
818 | return for_each_ref_in_submodule(submodule, "refs/heads/", fn, cb_data); | |
819 | } | |
820 | ||
cb5d709f | 821 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 822 | { |
2a8177b6 | 823 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
f8948e2f JH |
824 | } |
825 | ||
9ef6aeb0 HV |
826 | int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
827 | { | |
828 | return for_each_ref_in_submodule(submodule, "refs/remotes/", fn, cb_data); | |
829 | } | |
830 | ||
29268700 CC |
831 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) |
832 | { | |
0bad611b | 833 | return do_for_each_ref(NULL, "refs/replace/", fn, 13, 0, cb_data); |
29268700 CC |
834 | } |
835 | ||
a1bea2c1 JT |
836 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) |
837 | { | |
838 | struct strbuf buf = STRBUF_INIT; | |
839 | int ret = 0; | |
840 | unsigned char sha1[20]; | |
841 | int flag; | |
842 | ||
843 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); | |
c6893323 | 844 | if (!read_ref_full(buf.buf, sha1, 1, &flag)) |
a1bea2c1 JT |
845 | ret = fn(buf.buf, sha1, flag, cb_data); |
846 | strbuf_release(&buf); | |
847 | ||
848 | return ret; | |
849 | } | |
850 | ||
851 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
852 | { | |
853 | struct strbuf buf = STRBUF_INIT; | |
854 | int ret; | |
855 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
856 | ret = do_for_each_ref(NULL, buf.buf, fn, 0, 0, cb_data); | |
857 | strbuf_release(&buf); | |
858 | return ret; | |
859 | } | |
860 | ||
b09fe971 IL |
861 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
862 | const char *prefix, void *cb_data) | |
d08bae7e IL |
863 | { |
864 | struct strbuf real_pattern = STRBUF_INIT; | |
865 | struct ref_filter filter; | |
d08bae7e IL |
866 | int ret; |
867 | ||
b09fe971 | 868 | if (!prefix && prefixcmp(pattern, "refs/")) |
d08bae7e | 869 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
870 | else if (prefix) |
871 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
872 | strbuf_addstr(&real_pattern, pattern); |
873 | ||
894a9d33 | 874 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 875 | /* Append implied '/' '*' if not present. */ |
d08bae7e IL |
876 | if (real_pattern.buf[real_pattern.len - 1] != '/') |
877 | strbuf_addch(&real_pattern, '/'); | |
878 | /* No need to check for '*', there is none. */ | |
879 | strbuf_addch(&real_pattern, '*'); | |
880 | } | |
881 | ||
882 | filter.pattern = real_pattern.buf; | |
883 | filter.fn = fn; | |
884 | filter.cb_data = cb_data; | |
885 | ret = for_each_ref(filter_refs, &filter); | |
886 | ||
887 | strbuf_release(&real_pattern); | |
888 | return ret; | |
889 | } | |
890 | ||
b09fe971 IL |
891 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
892 | { | |
893 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
894 | } | |
895 | ||
f8948e2f JH |
896 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
897 | { | |
b3cfc406 | 898 | return do_for_each_ref(NULL, "", fn, 0, |
f8948e2f | 899 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); |
8a65ff76 LT |
900 | } |
901 | ||
03feddd6 JH |
902 | /* |
903 | * Make sure "ref" is something reasonable to have under ".git/refs/"; | |
904 | * We do not like it if: | |
905 | * | |
906 | * - any path component of it begins with ".", or | |
907 | * - it has double dots "..", or | |
908 | * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or | |
909 | * - it ends with a "/". | |
3e262b95 | 910 | * - it ends with ".lock" |
a4c2e699 | 911 | * - it contains a "\" (backslash) |
03feddd6 JH |
912 | */ |
913 | ||
9224b73b | 914 | /* Return true iff ch is not allowed in reference names. */ |
03feddd6 JH |
915 | static inline int bad_ref_char(int ch) |
916 | { | |
f3738c1c | 917 | if (((unsigned) ch) <= ' ' || ch == 0x7f || |
a4c2e699 | 918 | ch == '~' || ch == '^' || ch == ':' || ch == '\\') |
8558fd9e DB |
919 | return 1; |
920 | /* 2.13 Pattern Matching Notation */ | |
9224b73b | 921 | if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */ |
8558fd9e | 922 | return 1; |
8558fd9e | 923 | return 0; |
03feddd6 JH |
924 | } |
925 | ||
49295d4e | 926 | /* |
dfefa935 | 927 | * Try to read one refname component from the front of refname. Return |
49295d4e MH |
928 | * the length of the component found, or -1 if the component is not |
929 | * legal. | |
930 | */ | |
dfefa935 | 931 | static int check_refname_component(const char *refname, int flags) |
95fc7512 | 932 | { |
49295d4e MH |
933 | const char *cp; |
934 | char last = '\0'; | |
03feddd6 | 935 | |
dfefa935 | 936 | for (cp = refname; ; cp++) { |
49295d4e MH |
937 | char ch = *cp; |
938 | if (ch == '\0' || ch == '/') | |
939 | break; | |
940 | if (bad_ref_char(ch)) | |
941 | return -1; /* Illegal character in refname. */ | |
942 | if (last == '.' && ch == '.') | |
943 | return -1; /* Refname contains "..". */ | |
944 | if (last == '@' && ch == '{') | |
945 | return -1; /* Refname contains "@{". */ | |
cbdffe40 | 946 | last = ch; |
49295d4e | 947 | } |
dfefa935 | 948 | if (cp == refname) |
49295d4e | 949 | return -1; /* Component has zero length. */ |
dfefa935 | 950 | if (refname[0] == '.') { |
dce4bab6 MH |
951 | if (!(flags & REFNAME_DOT_COMPONENT)) |
952 | return -1; /* Component starts with '.'. */ | |
953 | /* | |
954 | * Even if leading dots are allowed, don't allow "." | |
955 | * as a component (".." is prevented by a rule above). | |
956 | */ | |
dfefa935 | 957 | if (refname[1] == '\0') |
dce4bab6 MH |
958 | return -1; /* Component equals ".". */ |
959 | } | |
dfefa935 | 960 | if (cp - refname >= 5 && !memcmp(cp - 5, ".lock", 5)) |
7e9d2fe9 | 961 | return -1; /* Refname ends with ".lock". */ |
dfefa935 | 962 | return cp - refname; |
49295d4e MH |
963 | } |
964 | ||
dfefa935 | 965 | int check_refname_format(const char *refname, int flags) |
95fc7512 | 966 | { |
49295d4e | 967 | int component_len, component_count = 0; |
03feddd6 | 968 | |
03feddd6 | 969 | while (1) { |
49295d4e | 970 | /* We are at the start of a path component. */ |
dfefa935 | 971 | component_len = check_refname_component(refname, flags); |
49295d4e MH |
972 | if (component_len < 0) { |
973 | if ((flags & REFNAME_REFSPEC_PATTERN) && | |
dfefa935 MH |
974 | refname[0] == '*' && |
975 | (refname[1] == '\0' || refname[1] == '/')) { | |
8d9c5010 MH |
976 | /* Accept one wildcard as a full refname component. */ |
977 | flags &= ~REFNAME_REFSPEC_PATTERN; | |
49295d4e MH |
978 | component_len = 1; |
979 | } else { | |
8d9c5010 | 980 | return -1; |
49295d4e | 981 | } |
03feddd6 | 982 | } |
49295d4e | 983 | component_count++; |
dfefa935 | 984 | if (refname[component_len] == '\0') |
49295d4e MH |
985 | break; |
986 | /* Skip to next component. */ | |
dfefa935 | 987 | refname += component_len + 1; |
03feddd6 | 988 | } |
49295d4e | 989 | |
dfefa935 | 990 | if (refname[component_len - 1] == '.') |
49295d4e | 991 | return -1; /* Refname ends with '.'. */ |
49295d4e MH |
992 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) |
993 | return -1; /* Refname has only one component. */ | |
994 | return 0; | |
95fc7512 DB |
995 | } |
996 | ||
4577e483 | 997 | const char *prettify_refname(const char *name) |
a9c37a72 | 998 | { |
a9c37a72 DB |
999 | return name + ( |
1000 | !prefixcmp(name, "refs/heads/") ? 11 : | |
1001 | !prefixcmp(name, "refs/tags/") ? 10 : | |
1002 | !prefixcmp(name, "refs/remotes/") ? 13 : | |
1003 | 0); | |
1004 | } | |
1005 | ||
79803322 SP |
1006 | const char *ref_rev_parse_rules[] = { |
1007 | "%.*s", | |
1008 | "refs/%.*s", | |
1009 | "refs/tags/%.*s", | |
1010 | "refs/heads/%.*s", | |
1011 | "refs/remotes/%.*s", | |
1012 | "refs/remotes/%.*s/HEAD", | |
1013 | NULL | |
1014 | }; | |
1015 | ||
1016 | int refname_match(const char *abbrev_name, const char *full_name, const char **rules) | |
1017 | { | |
1018 | const char **p; | |
1019 | const int abbrev_name_len = strlen(abbrev_name); | |
1020 | ||
1021 | for (p = rules; *p; p++) { | |
1022 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { | |
1023 | return 1; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | ||
e5f38ec3 | 1030 | static struct ref_lock *verify_lock(struct ref_lock *lock, |
4bd18c43 SP |
1031 | const unsigned char *old_sha1, int mustexist) |
1032 | { | |
c6893323 | 1033 | if (read_ref_full(lock->ref_name, lock->old_sha1, mustexist, NULL)) { |
434cd0cd | 1034 | error("Can't verify ref %s", lock->ref_name); |
4bd18c43 SP |
1035 | unlock_ref(lock); |
1036 | return NULL; | |
1037 | } | |
a89fccd2 | 1038 | if (hashcmp(lock->old_sha1, old_sha1)) { |
434cd0cd | 1039 | error("Ref %s is at %s but expected %s", lock->ref_name, |
4bd18c43 SP |
1040 | sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1)); |
1041 | unlock_ref(lock); | |
1042 | return NULL; | |
1043 | } | |
1044 | return lock; | |
1045 | } | |
1046 | ||
7155b727 | 1047 | static int remove_empty_directories(const char *file) |
bc7127ef JH |
1048 | { |
1049 | /* we want to create a file but there is a directory there; | |
1050 | * if that is an empty directory (or a directory that contains | |
1051 | * only empty directories), remove them. | |
1052 | */ | |
7155b727 JS |
1053 | struct strbuf path; |
1054 | int result; | |
bc7127ef | 1055 | |
7155b727 JS |
1056 | strbuf_init(&path, 20); |
1057 | strbuf_addstr(&path, file); | |
1058 | ||
a0f4afbe | 1059 | result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY); |
7155b727 JS |
1060 | |
1061 | strbuf_release(&path); | |
1062 | ||
1063 | return result; | |
bc7127ef JH |
1064 | } |
1065 | ||
19b68b1e MH |
1066 | /* |
1067 | * Return true iff a reference named refname could be created without | |
1068 | * conflicting with the name of an existing reference. If oldrefname | |
1069 | * is non-NULL, ignore potential conflicts with oldrefname (e.g., | |
1070 | * because oldrefname is scheduled for deletion in the same | |
1071 | * operation). | |
1072 | */ | |
dfefa935 | 1073 | static int is_refname_available(const char *refname, const char *oldrefname, |
19b68b1e | 1074 | struct ref_array *array) |
c976d415 | 1075 | { |
dfefa935 | 1076 | int i, namlen = strlen(refname); /* e.g. 'foo/bar' */ |
e9c4c111 JP |
1077 | for (i = 0; i < array->nr; i++ ) { |
1078 | struct ref_entry *entry = array->refs[i]; | |
1079 | /* entry->name could be 'foo' or 'foo/bar/baz' */ | |
dfefa935 | 1080 | if (!oldrefname || strcmp(oldrefname, entry->name)) { |
e9c4c111 | 1081 | int len = strlen(entry->name); |
c976d415 | 1082 | int cmplen = (namlen < len) ? namlen : len; |
dfefa935 MH |
1083 | const char *lead = (namlen < len) ? entry->name : refname; |
1084 | if (!strncmp(refname, entry->name, cmplen) && | |
c976d415 | 1085 | lead[cmplen] == '/') { |
19b68b1e MH |
1086 | error("'%s' exists; cannot create '%s'", |
1087 | entry->name, refname); | |
c976d415 LH |
1088 | return 0; |
1089 | } | |
1090 | } | |
c976d415 LH |
1091 | } |
1092 | return 1; | |
1093 | } | |
1094 | ||
ff74f7f1 JH |
1095 | /* |
1096 | * *string and *len will only be substituted, and *string returned (for | |
1097 | * later free()ing) if the string passed in is a magic short-hand form | |
1098 | * to name a branch. | |
1099 | */ | |
1100 | static char *substitute_branch_name(const char **string, int *len) | |
1101 | { | |
1102 | struct strbuf buf = STRBUF_INIT; | |
1103 | int ret = interpret_branch_name(*string, &buf); | |
1104 | ||
1105 | if (ret == *len) { | |
1106 | size_t size; | |
1107 | *string = strbuf_detach(&buf, &size); | |
1108 | *len = size; | |
1109 | return (char *)*string; | |
1110 | } | |
1111 | ||
1112 | return NULL; | |
1113 | } | |
1114 | ||
1115 | int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
1116 | { | |
1117 | char *last_branch = substitute_branch_name(&str, &len); | |
1118 | const char **p, *r; | |
1119 | int refs_found = 0; | |
1120 | ||
1121 | *ref = NULL; | |
1122 | for (p = ref_rev_parse_rules; *p; p++) { | |
1123 | char fullref[PATH_MAX]; | |
1124 | unsigned char sha1_from_ref[20]; | |
1125 | unsigned char *this_result; | |
1126 | int flag; | |
1127 | ||
1128 | this_result = refs_found ? sha1_from_ref : sha1; | |
1129 | mksnpath(fullref, sizeof(fullref), *p, len, str); | |
1130 | r = resolve_ref(fullref, this_result, 1, &flag); | |
1131 | if (r) { | |
1132 | if (!refs_found++) | |
1133 | *ref = xstrdup(r); | |
1134 | if (!warn_ambiguous_refs) | |
1135 | break; | |
55956350 | 1136 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD")) { |
ff74f7f1 | 1137 | warning("ignoring dangling symref %s.", fullref); |
55956350 JH |
1138 | } else if ((flag & REF_ISBROKEN) && strchr(fullref, '/')) { |
1139 | warning("ignoring broken ref %s.", fullref); | |
1140 | } | |
ff74f7f1 JH |
1141 | } |
1142 | free(last_branch); | |
1143 | return refs_found; | |
1144 | } | |
1145 | ||
1146 | int dwim_log(const char *str, int len, unsigned char *sha1, char **log) | |
1147 | { | |
1148 | char *last_branch = substitute_branch_name(&str, &len); | |
1149 | const char **p; | |
1150 | int logs_found = 0; | |
1151 | ||
1152 | *log = NULL; | |
1153 | for (p = ref_rev_parse_rules; *p; p++) { | |
1154 | struct stat st; | |
1155 | unsigned char hash[20]; | |
1156 | char path[PATH_MAX]; | |
1157 | const char *ref, *it; | |
1158 | ||
1159 | mksnpath(path, sizeof(path), *p, len, str); | |
1160 | ref = resolve_ref(path, hash, 1, NULL); | |
1161 | if (!ref) | |
1162 | continue; | |
1163 | if (!stat(git_path("logs/%s", path), &st) && | |
1164 | S_ISREG(st.st_mode)) | |
1165 | it = path; | |
1166 | else if (strcmp(ref, path) && | |
1167 | !stat(git_path("logs/%s", ref), &st) && | |
1168 | S_ISREG(st.st_mode)) | |
1169 | it = ref; | |
1170 | else | |
1171 | continue; | |
1172 | if (!logs_found++) { | |
1173 | *log = xstrdup(it); | |
1174 | hashcpy(sha1, hash); | |
1175 | } | |
1176 | if (!warn_ambiguous_refs) | |
1177 | break; | |
1178 | } | |
1179 | free(last_branch); | |
1180 | return logs_found; | |
1181 | } | |
1182 | ||
dfefa935 MH |
1183 | static struct ref_lock *lock_ref_sha1_basic(const char *refname, |
1184 | const unsigned char *old_sha1, | |
1185 | int flags, int *type_p) | |
4bd18c43 | 1186 | { |
434cd0cd | 1187 | char *ref_file; |
dfefa935 | 1188 | const char *orig_refname = refname; |
4bd18c43 | 1189 | struct ref_lock *lock; |
5cc3cef9 | 1190 | int last_errno = 0; |
acd3b9ec | 1191 | int type, lflags; |
4431fcc4 | 1192 | int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); |
5bdd8d4a | 1193 | int missing = 0; |
4bd18c43 SP |
1194 | |
1195 | lock = xcalloc(1, sizeof(struct ref_lock)); | |
1196 | lock->lock_fd = -1; | |
1197 | ||
dfefa935 MH |
1198 | refname = resolve_ref(refname, lock->old_sha1, mustexist, &type); |
1199 | if (!refname && errno == EISDIR) { | |
bc7127ef JH |
1200 | /* we are trying to lock foo but we used to |
1201 | * have foo/bar which now does not exist; | |
1202 | * it is normal for the empty directory 'foo' | |
1203 | * to remain. | |
1204 | */ | |
dfefa935 | 1205 | ref_file = git_path("%s", orig_refname); |
5cc3cef9 JH |
1206 | if (remove_empty_directories(ref_file)) { |
1207 | last_errno = errno; | |
dfefa935 | 1208 | error("there are still refs under '%s'", orig_refname); |
5cc3cef9 JH |
1209 | goto error_return; |
1210 | } | |
dfefa935 | 1211 | refname = resolve_ref(orig_refname, lock->old_sha1, mustexist, &type); |
bc7127ef | 1212 | } |
68db31cc SV |
1213 | if (type_p) |
1214 | *type_p = type; | |
dfefa935 | 1215 | if (!refname) { |
5cc3cef9 | 1216 | last_errno = errno; |
818f477c | 1217 | error("unable to resolve reference %s: %s", |
dfefa935 | 1218 | orig_refname, strerror(errno)); |
5cc3cef9 | 1219 | goto error_return; |
4bd18c43 | 1220 | } |
5bdd8d4a | 1221 | missing = is_null_sha1(lock->old_sha1); |
c976d415 LH |
1222 | /* When the ref did not exist and we are creating it, |
1223 | * make sure there is no existing ref that is packed | |
1224 | * whose name begins with our refname, nor a ref whose | |
1225 | * name is a proper prefix of our refname. | |
1226 | */ | |
5bdd8d4a | 1227 | if (missing && |
19b68b1e | 1228 | !is_refname_available(refname, NULL, get_packed_refs(NULL))) { |
f475e08e | 1229 | last_errno = ENOTDIR; |
c976d415 | 1230 | goto error_return; |
f475e08e | 1231 | } |
22a3844e | 1232 | |
c33d5174 | 1233 | lock->lk = xcalloc(1, sizeof(struct lock_file)); |
4bd18c43 | 1234 | |
acd3b9ec JH |
1235 | lflags = LOCK_DIE_ON_ERROR; |
1236 | if (flags & REF_NODEREF) { | |
dfefa935 | 1237 | refname = orig_refname; |
acd3b9ec JH |
1238 | lflags |= LOCK_NODEREF; |
1239 | } | |
dfefa935 MH |
1240 | lock->ref_name = xstrdup(refname); |
1241 | lock->orig_ref_name = xstrdup(orig_refname); | |
1242 | ref_file = git_path("%s", refname); | |
5bdd8d4a | 1243 | if (missing) |
68db31cc SV |
1244 | lock->force_write = 1; |
1245 | if ((flags & REF_NODEREF) && (type & REF_ISSYMREF)) | |
1246 | lock->force_write = 1; | |
4bd18c43 | 1247 | |
5cc3cef9 JH |
1248 | if (safe_create_leading_directories(ref_file)) { |
1249 | last_errno = errno; | |
1250 | error("unable to create directory for %s", ref_file); | |
1251 | goto error_return; | |
1252 | } | |
4bd18c43 | 1253 | |
acd3b9ec | 1254 | lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags); |
4bd18c43 | 1255 | return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock; |
5cc3cef9 JH |
1256 | |
1257 | error_return: | |
1258 | unlock_ref(lock); | |
1259 | errno = last_errno; | |
1260 | return NULL; | |
4bd18c43 SP |
1261 | } |
1262 | ||
dfefa935 | 1263 | struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1) |
95fc7512 | 1264 | { |
53cce84c | 1265 | char refpath[PATH_MAX]; |
dfefa935 | 1266 | if (check_refname_format(refname, 0)) |
4bd18c43 | 1267 | return NULL; |
dfefa935 | 1268 | strcpy(refpath, mkpath("refs/%s", refname)); |
68db31cc | 1269 | return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL); |
4bd18c43 SP |
1270 | } |
1271 | ||
dfefa935 MH |
1272 | struct ref_lock *lock_any_ref_for_update(const char *refname, |
1273 | const unsigned char *old_sha1, int flags) | |
4bd18c43 | 1274 | { |
dfefa935 | 1275 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) |
257f3020 | 1276 | return NULL; |
dfefa935 | 1277 | return lock_ref_sha1_basic(refname, old_sha1, flags, NULL); |
c0277d15 JH |
1278 | } |
1279 | ||
26a063a1 JH |
1280 | static struct lock_file packlock; |
1281 | ||
c0277d15 JH |
1282 | static int repack_without_ref(const char *refname) |
1283 | { | |
e9c4c111 JP |
1284 | struct ref_array *packed; |
1285 | struct ref_entry *ref; | |
1286 | int fd, i; | |
c0277d15 | 1287 | |
e9c4c111 JP |
1288 | packed = get_packed_refs(NULL); |
1289 | ref = search_ref_array(packed, refname); | |
1290 | if (ref == NULL) | |
c0277d15 | 1291 | return 0; |
c0277d15 | 1292 | fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0); |
1b018fd9 MV |
1293 | if (fd < 0) { |
1294 | unable_to_lock_error(git_path("packed-refs"), errno); | |
c0277d15 | 1295 | return error("cannot delete '%s' from packed refs", refname); |
1b018fd9 | 1296 | } |
c0277d15 | 1297 | |
e9c4c111 | 1298 | for (i = 0; i < packed->nr; i++) { |
c0277d15 JH |
1299 | char line[PATH_MAX + 100]; |
1300 | int len; | |
1301 | ||
e9c4c111 JP |
1302 | ref = packed->refs[i]; |
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; |
c976d415 | 1371 | |
450d4c0f | 1372 | if (log && S_ISLNK(loginfo.st_mode)) |
dfefa935 | 1373 | return error("reflog for %s is a symlink", oldrefname); |
c976d415 | 1374 | |
dfefa935 | 1375 | symref = resolve_ref(oldrefname, orig_sha1, 1, &flag); |
eca35a25 | 1376 | if (flag & REF_ISSYMREF) |
fa58186c | 1377 | return error("refname %s is a symbolic ref, renaming it is not supported", |
dfefa935 | 1378 | oldrefname); |
eca35a25 | 1379 | if (!symref) |
dfefa935 | 1380 | return error("refname %s not found", oldrefname); |
c976d415 | 1381 | |
19b68b1e | 1382 | if (!is_refname_available(newrefname, oldrefname, get_packed_refs(NULL))) |
c976d415 LH |
1383 | return 1; |
1384 | ||
19b68b1e | 1385 | if (!is_refname_available(newrefname, oldrefname, get_loose_refs(NULL))) |
c976d415 LH |
1386 | return 1; |
1387 | ||
dfefa935 | 1388 | if (log && rename(git_path("logs/%s", oldrefname), git_path(TMP_RENAMED_LOG))) |
765c2258 | 1389 | return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s", |
dfefa935 | 1390 | oldrefname, strerror(errno)); |
c976d415 | 1391 | |
dfefa935 MH |
1392 | if (delete_ref(oldrefname, orig_sha1, REF_NODEREF)) { |
1393 | error("unable to delete old %s", oldrefname); | |
c976d415 LH |
1394 | goto rollback; |
1395 | } | |
1396 | ||
dfefa935 MH |
1397 | if (!read_ref_full(newrefname, sha1, 1, &flag) && |
1398 | delete_ref(newrefname, sha1, REF_NODEREF)) { | |
c976d415 | 1399 | if (errno==EISDIR) { |
dfefa935 MH |
1400 | if (remove_empty_directories(git_path("%s", newrefname))) { |
1401 | error("Directory not empty: %s", newrefname); | |
c976d415 LH |
1402 | goto rollback; |
1403 | } | |
1404 | } else { | |
dfefa935 | 1405 | error("unable to delete existing %s", newrefname); |
c976d415 LH |
1406 | goto rollback; |
1407 | } | |
1408 | } | |
1409 | ||
dfefa935 MH |
1410 | if (log && safe_create_leading_directories(git_path("logs/%s", newrefname))) { |
1411 | error("unable to create directory for %s", newrefname); | |
c976d415 LH |
1412 | goto rollback; |
1413 | } | |
1414 | ||
1415 | retry: | |
dfefa935 | 1416 | if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newrefname))) { |
d9e74d57 JR |
1417 | if (errno==EISDIR || errno==ENOTDIR) { |
1418 | /* | |
1419 | * rename(a, b) when b is an existing | |
1420 | * directory ought to result in ISDIR, but | |
1421 | * Solaris 5.8 gives ENOTDIR. Sheesh. | |
1422 | */ | |
dfefa935 MH |
1423 | if (remove_empty_directories(git_path("logs/%s", newrefname))) { |
1424 | error("Directory not empty: logs/%s", newrefname); | |
c976d415 LH |
1425 | goto rollback; |
1426 | } | |
1427 | goto retry; | |
1428 | } else { | |
765c2258 | 1429 | error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s", |
dfefa935 | 1430 | newrefname, strerror(errno)); |
c976d415 LH |
1431 | goto rollback; |
1432 | } | |
1433 | } | |
1434 | logmoved = log; | |
1435 | ||
dfefa935 | 1436 | lock = lock_ref_sha1_basic(newrefname, NULL, 0, NULL); |
c976d415 | 1437 | if (!lock) { |
dfefa935 | 1438 | error("unable to lock %s for update", newrefname); |
c976d415 LH |
1439 | goto rollback; |
1440 | } | |
c976d415 LH |
1441 | lock->force_write = 1; |
1442 | hashcpy(lock->old_sha1, orig_sha1); | |
678d0f4c | 1443 | if (write_ref_sha1(lock, orig_sha1, logmsg)) { |
dfefa935 | 1444 | error("unable to write current sha1 into %s", newrefname); |
c976d415 LH |
1445 | goto rollback; |
1446 | } | |
1447 | ||
1448 | return 0; | |
1449 | ||
1450 | rollback: | |
dfefa935 | 1451 | lock = lock_ref_sha1_basic(oldrefname, NULL, 0, NULL); |
c976d415 | 1452 | if (!lock) { |
dfefa935 | 1453 | error("unable to lock %s for rollback", oldrefname); |
c976d415 LH |
1454 | goto rollbacklog; |
1455 | } | |
1456 | ||
1457 | lock->force_write = 1; | |
1458 | flag = log_all_ref_updates; | |
1459 | log_all_ref_updates = 0; | |
1460 | if (write_ref_sha1(lock, orig_sha1, NULL)) | |
dfefa935 | 1461 | error("unable to write current sha1 into %s", oldrefname); |
c976d415 LH |
1462 | log_all_ref_updates = flag; |
1463 | ||
1464 | rollbacklog: | |
dfefa935 | 1465 | if (logmoved && rename(git_path("logs/%s", newrefname), git_path("logs/%s", oldrefname))) |
c976d415 | 1466 | error("unable to restore logfile %s from %s: %s", |
dfefa935 | 1467 | oldrefname, newrefname, strerror(errno)); |
c976d415 | 1468 | if (!logmoved && log && |
dfefa935 | 1469 | rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldrefname))) |
765c2258 | 1470 | error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s", |
dfefa935 | 1471 | oldrefname, strerror(errno)); |
c976d415 LH |
1472 | |
1473 | return 1; | |
1474 | } | |
1475 | ||
435fc852 | 1476 | int close_ref(struct ref_lock *lock) |
b531394d BC |
1477 | { |
1478 | if (close_lock_file(lock->lk)) | |
1479 | return -1; | |
1480 | lock->lock_fd = -1; | |
1481 | return 0; | |
1482 | } | |
1483 | ||
435fc852 | 1484 | int commit_ref(struct ref_lock *lock) |
b531394d BC |
1485 | { |
1486 | if (commit_lock_file(lock->lk)) | |
1487 | return -1; | |
1488 | lock->lock_fd = -1; | |
1489 | return 0; | |
1490 | } | |
1491 | ||
e5f38ec3 | 1492 | void unlock_ref(struct ref_lock *lock) |
4bd18c43 | 1493 | { |
4ed7cd3a BC |
1494 | /* Do not free lock->lk -- atexit() still looks at them */ |
1495 | if (lock->lk) | |
1496 | rollback_lock_file(lock->lk); | |
434cd0cd | 1497 | free(lock->ref_name); |
1655707c | 1498 | free(lock->orig_ref_name); |
4bd18c43 SP |
1499 | free(lock); |
1500 | } | |
1501 | ||
0ec29a47 JH |
1502 | /* |
1503 | * copy the reflog message msg to buf, which has been allocated sufficiently | |
1504 | * large, while cleaning up the whitespaces. Especially, convert LF to space, | |
1505 | * because reflog file is one line per entry. | |
1506 | */ | |
1507 | static int copy_msg(char *buf, const char *msg) | |
1508 | { | |
1509 | char *cp = buf; | |
1510 | char c; | |
1511 | int wasspace = 1; | |
1512 | ||
1513 | *cp++ = '\t'; | |
1514 | while ((c = *msg++)) { | |
1515 | if (wasspace && isspace(c)) | |
1516 | continue; | |
1517 | wasspace = isspace(c); | |
1518 | if (wasspace) | |
1519 | c = ' '; | |
1520 | *cp++ = c; | |
1521 | } | |
1522 | while (buf < cp && isspace(cp[-1])) | |
1523 | cp--; | |
1524 | *cp++ = '\n'; | |
1525 | return cp - buf; | |
1526 | } | |
1527 | ||
dfefa935 | 1528 | int log_ref_setup(const char *refname, char *logfile, int bufsize) |
6de08ae6 | 1529 | { |
859c3017 | 1530 | int logfd, oflags = O_APPEND | O_WRONLY; |
9a13f0b7 | 1531 | |
dfefa935 | 1532 | git_snpath(logfile, bufsize, "logs/%s", refname); |
4057deb5 | 1533 | if (log_all_ref_updates && |
dfefa935 MH |
1534 | (!prefixcmp(refname, "refs/heads/") || |
1535 | !prefixcmp(refname, "refs/remotes/") || | |
1536 | !prefixcmp(refname, "refs/notes/") || | |
1537 | !strcmp(refname, "HEAD"))) { | |
157aaea5 | 1538 | if (safe_create_leading_directories(logfile) < 0) |
6de08ae6 | 1539 | return error("unable to create directory for %s", |
157aaea5 | 1540 | logfile); |
6de08ae6 SP |
1541 | oflags |= O_CREAT; |
1542 | } | |
1543 | ||
157aaea5 | 1544 | logfd = open(logfile, oflags, 0666); |
6de08ae6 | 1545 | if (logfd < 0) { |
1974bf62 | 1546 | if (!(oflags & O_CREAT) && errno == ENOENT) |
6de08ae6 | 1547 | return 0; |
3b463c3f JH |
1548 | |
1549 | if ((oflags & O_CREAT) && errno == EISDIR) { | |
157aaea5 | 1550 | if (remove_empty_directories(logfile)) { |
3b463c3f | 1551 | return error("There are still logs under '%s'", |
157aaea5 | 1552 | logfile); |
3b463c3f | 1553 | } |
157aaea5 | 1554 | logfd = open(logfile, oflags, 0666); |
3b463c3f JH |
1555 | } |
1556 | ||
1557 | if (logfd < 0) | |
1558 | return error("Unable to append to %s: %s", | |
157aaea5 | 1559 | logfile, strerror(errno)); |
6de08ae6 SP |
1560 | } |
1561 | ||
157aaea5 | 1562 | adjust_shared_perm(logfile); |
859c3017 EM |
1563 | close(logfd); |
1564 | return 0; | |
1565 | } | |
443b92b6 | 1566 | |
dfefa935 | 1567 | static int log_ref_write(const char *refname, const unsigned char *old_sha1, |
859c3017 EM |
1568 | const unsigned char *new_sha1, const char *msg) |
1569 | { | |
1570 | int logfd, result, written, oflags = O_APPEND | O_WRONLY; | |
1571 | unsigned maxlen, len; | |
1572 | int msglen; | |
157aaea5 | 1573 | char log_file[PATH_MAX]; |
859c3017 EM |
1574 | char *logrec; |
1575 | const char *committer; | |
1576 | ||
1577 | if (log_all_ref_updates < 0) | |
1578 | log_all_ref_updates = !is_bare_repository(); | |
1579 | ||
dfefa935 | 1580 | result = log_ref_setup(refname, log_file, sizeof(log_file)); |
859c3017 EM |
1581 | if (result) |
1582 | return result; | |
1583 | ||
1584 | logfd = open(log_file, oflags); | |
1585 | if (logfd < 0) | |
1586 | return 0; | |
0ec29a47 | 1587 | msglen = msg ? strlen(msg) : 0; |
774751a8 | 1588 | committer = git_committer_info(0); |
8ac65937 JH |
1589 | maxlen = strlen(committer) + msglen + 100; |
1590 | logrec = xmalloc(maxlen); | |
1591 | len = sprintf(logrec, "%s %s %s\n", | |
9a13f0b7 NP |
1592 | sha1_to_hex(old_sha1), |
1593 | sha1_to_hex(new_sha1), | |
8ac65937 JH |
1594 | committer); |
1595 | if (msglen) | |
0ec29a47 | 1596 | len += copy_msg(logrec + len - 1, msg) - 1; |
93822c22 | 1597 | written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1; |
6de08ae6 | 1598 | free(logrec); |
91c8d590 | 1599 | if (close(logfd) != 0 || written != len) |
9a13f0b7 | 1600 | return error("Unable to append to %s", log_file); |
6de08ae6 SP |
1601 | return 0; |
1602 | } | |
1603 | ||
c3b0dec5 LT |
1604 | static int is_branch(const char *refname) |
1605 | { | |
1606 | return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"); | |
1607 | } | |
1608 | ||
4bd18c43 SP |
1609 | int write_ref_sha1(struct ref_lock *lock, |
1610 | const unsigned char *sha1, const char *logmsg) | |
1611 | { | |
1612 | static char term = '\n'; | |
c3b0dec5 | 1613 | struct object *o; |
4bd18c43 SP |
1614 | |
1615 | if (!lock) | |
95fc7512 | 1616 | return -1; |
a89fccd2 | 1617 | if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) { |
4bd18c43 SP |
1618 | unlock_ref(lock); |
1619 | return 0; | |
95fc7512 | 1620 | } |
c3b0dec5 LT |
1621 | o = parse_object(sha1); |
1622 | if (!o) { | |
7be8b3ba | 1623 | error("Trying to write ref %s with nonexistent object %s", |
c3b0dec5 LT |
1624 | lock->ref_name, sha1_to_hex(sha1)); |
1625 | unlock_ref(lock); | |
1626 | return -1; | |
1627 | } | |
1628 | if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) { | |
1629 | error("Trying to write non-commit object %s to branch %s", | |
1630 | sha1_to_hex(sha1), lock->ref_name); | |
1631 | unlock_ref(lock); | |
1632 | return -1; | |
1633 | } | |
93822c22 AW |
1634 | if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 || |
1635 | write_in_full(lock->lock_fd, &term, 1) != 1 | |
b531394d | 1636 | || close_ref(lock) < 0) { |
c33d5174 | 1637 | error("Couldn't write %s", lock->lk->filename); |
4bd18c43 SP |
1638 | unlock_ref(lock); |
1639 | return -1; | |
1640 | } | |
8bf90dc9 | 1641 | clear_loose_ref_cache(get_ref_cache(NULL)); |
bd104db1 NP |
1642 | if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 || |
1643 | (strcmp(lock->ref_name, lock->orig_ref_name) && | |
1644 | log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) { | |
6de08ae6 SP |
1645 | unlock_ref(lock); |
1646 | return -1; | |
1647 | } | |
605fac8b NP |
1648 | if (strcmp(lock->orig_ref_name, "HEAD") != 0) { |
1649 | /* | |
1650 | * Special hack: If a branch is updated directly and HEAD | |
1651 | * points to it (may happen on the remote side of a push | |
1652 | * for example) then logically the HEAD reflog should be | |
1653 | * updated too. | |
1654 | * A generic solution implies reverse symref information, | |
1655 | * but finding all symrefs pointing to the given branch | |
1656 | * would be rather costly for this rare event (the direct | |
1657 | * update of a branch) to be worth it. So let's cheat and | |
1658 | * check with HEAD only which should cover 99% of all usage | |
1659 | * scenarios (even 100% of the default ones). | |
1660 | */ | |
1661 | unsigned char head_sha1[20]; | |
1662 | int head_flag; | |
1663 | const char *head_ref; | |
1664 | head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag); | |
1665 | if (head_ref && (head_flag & REF_ISSYMREF) && | |
1666 | !strcmp(head_ref, lock->ref_name)) | |
1667 | log_ref_write("HEAD", lock->old_sha1, sha1, logmsg); | |
1668 | } | |
b531394d | 1669 | if (commit_ref(lock)) { |
434cd0cd | 1670 | error("Couldn't set %s", lock->ref_name); |
4bd18c43 SP |
1671 | unlock_ref(lock); |
1672 | return -1; | |
1673 | } | |
4bd18c43 SP |
1674 | unlock_ref(lock); |
1675 | return 0; | |
95fc7512 | 1676 | } |
d556fae2 | 1677 | |
8b5157e4 NP |
1678 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1679 | const char *logmsg) | |
41b625b0 NP |
1680 | { |
1681 | const char *lockpath; | |
1682 | char ref[1000]; | |
1683 | int fd, len, written; | |
a4f34cbb | 1684 | char *git_HEAD = git_pathdup("%s", ref_target); |
8b5157e4 NP |
1685 | unsigned char old_sha1[20], new_sha1[20]; |
1686 | ||
1687 | if (logmsg && read_ref(ref_target, old_sha1)) | |
1688 | hashclr(old_sha1); | |
41b625b0 | 1689 | |
d48744d1 JH |
1690 | if (safe_create_leading_directories(git_HEAD) < 0) |
1691 | return error("unable to create directory for %s", git_HEAD); | |
1692 | ||
41b625b0 NP |
1693 | #ifndef NO_SYMLINK_HEAD |
1694 | if (prefer_symlink_refs) { | |
1695 | unlink(git_HEAD); | |
1696 | if (!symlink(refs_heads_master, git_HEAD)) | |
8b5157e4 | 1697 | goto done; |
41b625b0 NP |
1698 | fprintf(stderr, "no symlink - falling back to symbolic ref\n"); |
1699 | } | |
1700 | #endif | |
1701 | ||
1702 | len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master); | |
1703 | if (sizeof(ref) <= len) { | |
1704 | error("refname too long: %s", refs_heads_master); | |
47fc52e2 | 1705 | goto error_free_return; |
41b625b0 NP |
1706 | } |
1707 | lockpath = mkpath("%s.lock", git_HEAD); | |
1708 | fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1709 | if (fd < 0) { | |
1710 | error("Unable to open %s for writing", lockpath); | |
47fc52e2 | 1711 | goto error_free_return; |
41b625b0 NP |
1712 | } |
1713 | written = write_in_full(fd, ref, len); | |
91c8d590 | 1714 | if (close(fd) != 0 || written != len) { |
41b625b0 | 1715 | error("Unable to write to %s", lockpath); |
47fc52e2 | 1716 | goto error_unlink_return; |
41b625b0 NP |
1717 | } |
1718 | if (rename(lockpath, git_HEAD) < 0) { | |
41b625b0 | 1719 | error("Unable to create %s", git_HEAD); |
47fc52e2 | 1720 | goto error_unlink_return; |
41b625b0 NP |
1721 | } |
1722 | if (adjust_shared_perm(git_HEAD)) { | |
41b625b0 | 1723 | error("Unable to fix permissions on %s", lockpath); |
47fc52e2 | 1724 | error_unlink_return: |
691f1a28 | 1725 | unlink_or_warn(lockpath); |
47fc52e2 JH |
1726 | error_free_return: |
1727 | free(git_HEAD); | |
1728 | return -1; | |
41b625b0 | 1729 | } |
8b5157e4 | 1730 | |
ee96d11b | 1731 | #ifndef NO_SYMLINK_HEAD |
8b5157e4 | 1732 | done: |
ee96d11b | 1733 | #endif |
8b5157e4 NP |
1734 | if (logmsg && !read_ref(refs_heads_master, new_sha1)) |
1735 | log_ref_write(ref_target, old_sha1, new_sha1, logmsg); | |
1736 | ||
47fc52e2 | 1737 | free(git_HEAD); |
41b625b0 NP |
1738 | return 0; |
1739 | } | |
1740 | ||
16d7cc90 JH |
1741 | static char *ref_msg(const char *line, const char *endp) |
1742 | { | |
1743 | const char *ep; | |
16d7cc90 | 1744 | line += 82; |
182af834 PH |
1745 | ep = memchr(line, '\n', endp - line); |
1746 | if (!ep) | |
1747 | ep = endp; | |
1748 | return xmemdupz(line, ep - line); | |
16d7cc90 JH |
1749 | } |
1750 | ||
dfefa935 MH |
1751 | int read_ref_at(const char *refname, unsigned long at_time, int cnt, |
1752 | unsigned char *sha1, char **msg, | |
1753 | unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
d556fae2 | 1754 | { |
e5229042 | 1755 | const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec; |
d556fae2 | 1756 | char *tz_c; |
e29cb53a | 1757 | int logfd, tz, reccnt = 0; |
d556fae2 SP |
1758 | struct stat st; |
1759 | unsigned long date; | |
e5229042 | 1760 | unsigned char logged_sha1[20]; |
cb48cb58 | 1761 | void *log_mapped; |
dc49cd76 | 1762 | size_t mapsz; |
d556fae2 | 1763 | |
dfefa935 | 1764 | logfile = git_path("logs/%s", refname); |
d556fae2 SP |
1765 | logfd = open(logfile, O_RDONLY, 0); |
1766 | if (logfd < 0) | |
d824cbba | 1767 | die_errno("Unable to read log '%s'", logfile); |
d556fae2 SP |
1768 | fstat(logfd, &st); |
1769 | if (!st.st_size) | |
1770 | die("Log %s is empty.", logfile); | |
dc49cd76 SP |
1771 | mapsz = xsize_t(st.st_size); |
1772 | log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0); | |
cb48cb58 | 1773 | logdata = log_mapped; |
d556fae2 SP |
1774 | close(logfd); |
1775 | ||
e5229042 | 1776 | lastrec = NULL; |
d556fae2 SP |
1777 | rec = logend = logdata + st.st_size; |
1778 | while (logdata < rec) { | |
e29cb53a | 1779 | reccnt++; |
d556fae2 SP |
1780 | if (logdata < rec && *(rec-1) == '\n') |
1781 | rec--; | |
e5229042 SP |
1782 | lastgt = NULL; |
1783 | while (logdata < rec && *(rec-1) != '\n') { | |
d556fae2 | 1784 | rec--; |
e5229042 SP |
1785 | if (*rec == '>') |
1786 | lastgt = rec; | |
1787 | } | |
1788 | if (!lastgt) | |
d556fae2 | 1789 | die("Log %s is corrupt.", logfile); |
e5229042 | 1790 | date = strtoul(lastgt + 1, &tz_c, 10); |
ab2a1a32 | 1791 | if (date <= at_time || cnt == 0) { |
76a44c5c | 1792 | tz = strtoul(tz_c, NULL, 10); |
16d7cc90 JH |
1793 | if (msg) |
1794 | *msg = ref_msg(rec, logend); | |
1795 | if (cutoff_time) | |
1796 | *cutoff_time = date; | |
1797 | if (cutoff_tz) | |
1798 | *cutoff_tz = tz; | |
1799 | if (cutoff_cnt) | |
76a44c5c | 1800 | *cutoff_cnt = reccnt - 1; |
e5229042 SP |
1801 | if (lastrec) { |
1802 | if (get_sha1_hex(lastrec, logged_sha1)) | |
1803 | die("Log %s is corrupt.", logfile); | |
1804 | if (get_sha1_hex(rec + 41, sha1)) | |
1805 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1806 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1807 | warning("Log %s has gap after %s.", |
73013afd | 1808 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 | 1809 | } |
e5f38ec3 JH |
1810 | } |
1811 | else if (date == at_time) { | |
e5229042 SP |
1812 | if (get_sha1_hex(rec + 41, sha1)) |
1813 | die("Log %s is corrupt.", logfile); | |
e5f38ec3 JH |
1814 | } |
1815 | else { | |
e5229042 SP |
1816 | if (get_sha1_hex(rec + 41, logged_sha1)) |
1817 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1818 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1819 | warning("Log %s unexpectedly ended on %s.", |
73013afd | 1820 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 SP |
1821 | } |
1822 | } | |
dc49cd76 | 1823 | munmap(log_mapped, mapsz); |
d556fae2 SP |
1824 | return 0; |
1825 | } | |
e5229042 | 1826 | lastrec = rec; |
ab2a1a32 JH |
1827 | if (cnt > 0) |
1828 | cnt--; | |
d556fae2 SP |
1829 | } |
1830 | ||
e5229042 SP |
1831 | rec = logdata; |
1832 | while (rec < logend && *rec != '>' && *rec != '\n') | |
1833 | rec++; | |
1834 | if (rec == logend || *rec == '\n') | |
d556fae2 | 1835 | die("Log %s is corrupt.", logfile); |
e5229042 | 1836 | date = strtoul(rec + 1, &tz_c, 10); |
d556fae2 SP |
1837 | tz = strtoul(tz_c, NULL, 10); |
1838 | if (get_sha1_hex(logdata, sha1)) | |
1839 | die("Log %s is corrupt.", logfile); | |
d1a4489a JK |
1840 | if (is_null_sha1(sha1)) { |
1841 | if (get_sha1_hex(logdata + 41, sha1)) | |
1842 | die("Log %s is corrupt.", logfile); | |
1843 | } | |
16d7cc90 JH |
1844 | if (msg) |
1845 | *msg = ref_msg(logdata, logend); | |
dc49cd76 | 1846 | munmap(log_mapped, mapsz); |
16d7cc90 JH |
1847 | |
1848 | if (cutoff_time) | |
1849 | *cutoff_time = date; | |
1850 | if (cutoff_tz) | |
1851 | *cutoff_tz = tz; | |
1852 | if (cutoff_cnt) | |
1853 | *cutoff_cnt = reccnt; | |
1854 | return 1; | |
d556fae2 | 1855 | } |
2ff81662 | 1856 | |
dfefa935 | 1857 | int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long ofs, void *cb_data) |
2ff81662 JH |
1858 | { |
1859 | const char *logfile; | |
1860 | FILE *logfp; | |
8ca78803 | 1861 | struct strbuf sb = STRBUF_INIT; |
2266bf27 | 1862 | int ret = 0; |
2ff81662 | 1863 | |
dfefa935 | 1864 | logfile = git_path("logs/%s", refname); |
2ff81662 JH |
1865 | logfp = fopen(logfile, "r"); |
1866 | if (!logfp) | |
883d60fa | 1867 | return -1; |
101d15e0 JH |
1868 | |
1869 | if (ofs) { | |
1870 | struct stat statbuf; | |
1871 | if (fstat(fileno(logfp), &statbuf) || | |
1872 | statbuf.st_size < ofs || | |
1873 | fseek(logfp, -ofs, SEEK_END) || | |
8ca78803 | 1874 | strbuf_getwholeline(&sb, logfp, '\n')) { |
9d33f7c2 | 1875 | fclose(logfp); |
8ca78803 | 1876 | strbuf_release(&sb); |
101d15e0 | 1877 | return -1; |
9d33f7c2 | 1878 | } |
101d15e0 JH |
1879 | } |
1880 | ||
8ca78803 | 1881 | while (!strbuf_getwholeline(&sb, logfp, '\n')) { |
2ff81662 | 1882 | unsigned char osha1[20], nsha1[20]; |
883d60fa JS |
1883 | char *email_end, *message; |
1884 | unsigned long timestamp; | |
8ca78803 | 1885 | int tz; |
2ff81662 JH |
1886 | |
1887 | /* old SP new SP name <email> SP time TAB msg LF */ | |
8ca78803 RS |
1888 | if (sb.len < 83 || sb.buf[sb.len - 1] != '\n' || |
1889 | get_sha1_hex(sb.buf, osha1) || sb.buf[40] != ' ' || | |
1890 | get_sha1_hex(sb.buf + 41, nsha1) || sb.buf[81] != ' ' || | |
1891 | !(email_end = strchr(sb.buf + 82, '>')) || | |
883d60fa JS |
1892 | email_end[1] != ' ' || |
1893 | !(timestamp = strtoul(email_end + 2, &message, 10)) || | |
1894 | !message || message[0] != ' ' || | |
1895 | (message[1] != '+' && message[1] != '-') || | |
1896 | !isdigit(message[2]) || !isdigit(message[3]) || | |
b4dd4856 | 1897 | !isdigit(message[4]) || !isdigit(message[5])) |
2ff81662 | 1898 | continue; /* corrupt? */ |
883d60fa JS |
1899 | email_end[1] = '\0'; |
1900 | tz = strtol(message + 1, NULL, 10); | |
b4dd4856 JS |
1901 | if (message[6] != '\t') |
1902 | message += 6; | |
1903 | else | |
1904 | message += 7; | |
8ca78803 RS |
1905 | ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message, |
1906 | cb_data); | |
883d60fa | 1907 | if (ret) |
2266bf27 | 1908 | break; |
2ff81662 JH |
1909 | } |
1910 | fclose(logfp); | |
8ca78803 | 1911 | strbuf_release(&sb); |
2266bf27 | 1912 | return ret; |
2ff81662 | 1913 | } |
e29cb53a | 1914 | |
dfefa935 | 1915 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data) |
101d15e0 | 1916 | { |
dfefa935 | 1917 | return for_each_recent_reflog_ent(refname, fn, 0, cb_data); |
101d15e0 JH |
1918 | } |
1919 | ||
eb8381c8 NP |
1920 | static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data) |
1921 | { | |
1922 | DIR *dir = opendir(git_path("logs/%s", base)); | |
fcee5a14 | 1923 | int retval = 0; |
eb8381c8 NP |
1924 | |
1925 | if (dir) { | |
1926 | struct dirent *de; | |
1927 | int baselen = strlen(base); | |
1928 | char *log = xmalloc(baselen + 257); | |
1929 | ||
1930 | memcpy(log, base, baselen); | |
1931 | if (baselen && base[baselen-1] != '/') | |
1932 | log[baselen++] = '/'; | |
1933 | ||
1934 | while ((de = readdir(dir)) != NULL) { | |
1935 | struct stat st; | |
1936 | int namelen; | |
1937 | ||
1938 | if (de->d_name[0] == '.') | |
1939 | continue; | |
1940 | namelen = strlen(de->d_name); | |
1941 | if (namelen > 255) | |
1942 | continue; | |
1943 | if (has_extension(de->d_name, ".lock")) | |
1944 | continue; | |
1945 | memcpy(log + baselen, de->d_name, namelen+1); | |
1946 | if (stat(git_path("logs/%s", log), &st) < 0) | |
1947 | continue; | |
1948 | if (S_ISDIR(st.st_mode)) { | |
1949 | retval = do_for_each_reflog(log, fn, cb_data); | |
1950 | } else { | |
1951 | unsigned char sha1[20]; | |
c6893323 | 1952 | if (read_ref_full(log, sha1, 0, NULL)) |
eb8381c8 NP |
1953 | retval = error("bad ref for %s", log); |
1954 | else | |
1955 | retval = fn(log, sha1, 0, cb_data); | |
1956 | } | |
1957 | if (retval) | |
1958 | break; | |
1959 | } | |
1960 | free(log); | |
1961 | closedir(dir); | |
1962 | } | |
acb39f64 | 1963 | else if (*base) |
fcee5a14 | 1964 | return errno; |
eb8381c8 NP |
1965 | return retval; |
1966 | } | |
1967 | ||
1968 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
1969 | { | |
1970 | return do_for_each_reflog("", fn, cb_data); | |
1971 | } | |
3d9f037c CR |
1972 | |
1973 | int update_ref(const char *action, const char *refname, | |
1974 | const unsigned char *sha1, const unsigned char *oldval, | |
1975 | int flags, enum action_on_err onerr) | |
1976 | { | |
1977 | static struct ref_lock *lock; | |
1978 | lock = lock_any_ref_for_update(refname, oldval, flags); | |
1979 | if (!lock) { | |
1980 | const char *str = "Cannot lock the ref '%s'."; | |
1981 | switch (onerr) { | |
1982 | case MSG_ON_ERR: error(str, refname); break; | |
1983 | case DIE_ON_ERR: die(str, refname); break; | |
1984 | case QUIET_ON_ERR: break; | |
1985 | } | |
1986 | return 1; | |
1987 | } | |
1988 | if (write_ref_sha1(lock, sha1, action) < 0) { | |
1989 | const char *str = "Cannot update the ref '%s'."; | |
1990 | switch (onerr) { | |
1991 | case MSG_ON_ERR: error(str, refname); break; | |
1992 | case DIE_ON_ERR: die(str, refname); break; | |
1993 | case QUIET_ON_ERR: break; | |
1994 | } | |
1995 | return 1; | |
1996 | } | |
1997 | return 0; | |
1998 | } | |
cda69f48 | 1999 | |
2c5c66be | 2000 | int ref_exists(const char *refname) |
c17b2294 JH |
2001 | { |
2002 | unsigned char sha1[20]; | |
2003 | return !!resolve_ref(refname, sha1, 1, NULL); | |
2004 | } | |
2005 | ||
5483f799 | 2006 | struct ref *find_ref_by_name(const struct ref *list, const char *name) |
cda69f48 JK |
2007 | { |
2008 | for ( ; list; list = list->next) | |
2009 | if (!strcmp(list->name, name)) | |
5483f799 | 2010 | return (struct ref *)list; |
cda69f48 JK |
2011 | return NULL; |
2012 | } | |
7c2b3029 JK |
2013 | |
2014 | /* | |
2015 | * generate a format suitable for scanf from a ref_rev_parse_rules | |
2016 | * rule, that is replace the "%.*s" spec with a "%s" spec | |
2017 | */ | |
2018 | static void gen_scanf_fmt(char *scanf_fmt, const char *rule) | |
2019 | { | |
2020 | char *spec; | |
2021 | ||
2022 | spec = strstr(rule, "%.*s"); | |
2023 | if (!spec || strstr(spec + 4, "%.*s")) | |
2024 | die("invalid rule in ref_rev_parse_rules: %s", rule); | |
2025 | ||
2026 | /* copy all until spec */ | |
2027 | strncpy(scanf_fmt, rule, spec - rule); | |
2028 | scanf_fmt[spec - rule] = '\0'; | |
2029 | /* copy new spec */ | |
2030 | strcat(scanf_fmt, "%s"); | |
2031 | /* copy remaining rule */ | |
2032 | strcat(scanf_fmt, spec + 4); | |
2033 | ||
2034 | return; | |
2035 | } | |
2036 | ||
dfefa935 | 2037 | char *shorten_unambiguous_ref(const char *refname, int strict) |
7c2b3029 JK |
2038 | { |
2039 | int i; | |
2040 | static char **scanf_fmts; | |
2041 | static int nr_rules; | |
2042 | char *short_name; | |
2043 | ||
2044 | /* pre generate scanf formats from ref_rev_parse_rules[] */ | |
2045 | if (!nr_rules) { | |
2046 | size_t total_len = 0; | |
2047 | ||
2048 | /* the rule list is NULL terminated, count them first */ | |
2049 | for (; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
2050 | /* no +1 because strlen("%s") < strlen("%.*s") */ | |
2051 | total_len += strlen(ref_rev_parse_rules[nr_rules]); | |
2052 | ||
2053 | scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); | |
2054 | ||
2055 | total_len = 0; | |
2056 | for (i = 0; i < nr_rules; i++) { | |
2057 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] | |
2058 | + total_len; | |
2059 | gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); | |
2060 | total_len += strlen(ref_rev_parse_rules[i]); | |
2061 | } | |
2062 | } | |
2063 | ||
2064 | /* bail out if there are no rules */ | |
2065 | if (!nr_rules) | |
dfefa935 | 2066 | return xstrdup(refname); |
7c2b3029 | 2067 | |
dfefa935 MH |
2068 | /* buffer for scanf result, at most refname must fit */ |
2069 | short_name = xstrdup(refname); | |
7c2b3029 JK |
2070 | |
2071 | /* skip first rule, it will always match */ | |
2072 | for (i = nr_rules - 1; i > 0 ; --i) { | |
2073 | int j; | |
6e7b3309 | 2074 | int rules_to_fail = i; |
7c2b3029 JK |
2075 | int short_name_len; |
2076 | ||
dfefa935 | 2077 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) |
7c2b3029 JK |
2078 | continue; |
2079 | ||
2080 | short_name_len = strlen(short_name); | |
2081 | ||
6e7b3309 BW |
2082 | /* |
2083 | * in strict mode, all (except the matched one) rules | |
2084 | * must fail to resolve to a valid non-ambiguous ref | |
2085 | */ | |
2086 | if (strict) | |
2087 | rules_to_fail = nr_rules; | |
2088 | ||
7c2b3029 JK |
2089 | /* |
2090 | * check if the short name resolves to a valid ref, | |
2091 | * but use only rules prior to the matched one | |
2092 | */ | |
6e7b3309 | 2093 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 | 2094 | const char *rule = ref_rev_parse_rules[j]; |
7c2b3029 JK |
2095 | char refname[PATH_MAX]; |
2096 | ||
6e7b3309 BW |
2097 | /* skip matched rule */ |
2098 | if (i == j) | |
2099 | continue; | |
2100 | ||
7c2b3029 JK |
2101 | /* |
2102 | * the short name is ambiguous, if it resolves | |
2103 | * (with this previous rule) to a valid ref | |
2104 | * read_ref() returns 0 on success | |
2105 | */ | |
2106 | mksnpath(refname, sizeof(refname), | |
2107 | rule, short_name_len, short_name); | |
c6893323 | 2108 | if (ref_exists(refname)) |
7c2b3029 JK |
2109 | break; |
2110 | } | |
2111 | ||
2112 | /* | |
2113 | * short name is non-ambiguous if all previous rules | |
2114 | * haven't resolved to a valid ref | |
2115 | */ | |
6e7b3309 | 2116 | if (j == rules_to_fail) |
7c2b3029 JK |
2117 | return short_name; |
2118 | } | |
2119 | ||
2120 | free(short_name); | |
dfefa935 | 2121 | return xstrdup(refname); |
7c2b3029 | 2122 | } |