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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; | |
e6ed3ca6 MH |
20 | |
21 | /* | |
22 | * Entries with index 0 <= i < sorted are sorted by name. New | |
23 | * entries are appended to the list unsorted, and are sorted | |
24 | * only when required; thus we avoid the need to sort the list | |
25 | * after the addition of every reference. | |
26 | */ | |
27 | int sorted; | |
28 | ||
e9c4c111 JP |
29 | struct ref_entry **refs; |
30 | }; | |
31 | ||
fbd09e41 MH |
32 | /* |
33 | * Parse one line from a packed-refs file. Write the SHA1 to sha1. | |
34 | * Return a pointer to the refname within the line (null-terminated), | |
35 | * or NULL if there was a problem. | |
36 | */ | |
f4204ab9 | 37 | static const char *parse_ref_line(char *line, unsigned char *sha1) |
e1e22e37 LT |
38 | { |
39 | /* | |
40 | * 42: the answer to everything. | |
41 | * | |
42 | * In this case, it happens to be the answer to | |
43 | * 40 (length of sha1 hex representation) | |
44 | * +1 (space in between hex and name) | |
45 | * +1 (newline at the end of the line) | |
46 | */ | |
47 | int len = strlen(line) - 42; | |
48 | ||
49 | if (len <= 0) | |
50 | return NULL; | |
51 | if (get_sha1_hex(line, sha1) < 0) | |
52 | return NULL; | |
53 | if (!isspace(line[40])) | |
54 | return NULL; | |
55 | line += 41; | |
f4204ab9 JH |
56 | if (isspace(*line)) |
57 | return NULL; | |
e1e22e37 LT |
58 | if (line[len] != '\n') |
59 | return NULL; | |
60 | line[len] = 0; | |
cf0adba7 | 61 | |
e1e22e37 LT |
62 | return line; |
63 | } | |
64 | ||
cddc4258 MH |
65 | static struct ref_entry *create_ref_entry(const char *refname, |
66 | const unsigned char *sha1, int flag, | |
67 | int check_name) | |
e1e22e37 LT |
68 | { |
69 | int len; | |
cddc4258 | 70 | struct ref_entry *ref; |
e1e22e37 | 71 | |
09116a1c | 72 | if (check_name && |
dfefa935 MH |
73 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL|REFNAME_DOT_COMPONENT)) |
74 | die("Reference has invalid format: '%s'", refname); | |
cddc4258 MH |
75 | len = strlen(refname) + 1; |
76 | ref = xmalloc(sizeof(struct ref_entry) + len); | |
77 | hashcpy(ref->sha1, sha1); | |
78 | hashclr(ref->peeled); | |
79 | memcpy(ref->name, refname, len); | |
80 | ref->flag = flag; | |
81 | return ref; | |
82 | } | |
83 | ||
84 | /* Add a ref_entry to the end of the ref_array (unsorted). */ | |
dd73ecd1 | 85 | static void add_ref(struct ref_array *refs, struct ref_entry *ref) |
cddc4258 | 86 | { |
e9c4c111 | 87 | ALLOC_GROW(refs->refs, refs->nr + 1, refs->alloc); |
cddc4258 | 88 | refs->refs[refs->nr++] = ref; |
c774aab9 JP |
89 | } |
90 | ||
e9c4c111 | 91 | static int ref_entry_cmp(const void *a, const void *b) |
c774aab9 | 92 | { |
e9c4c111 JP |
93 | struct ref_entry *one = *(struct ref_entry **)a; |
94 | struct ref_entry *two = *(struct ref_entry **)b; | |
95 | return strcmp(one->name, two->name); | |
96 | } | |
c774aab9 | 97 | |
202a56a9 MH |
98 | /* |
99 | * Emit a warning and return true iff ref1 and ref2 have the same name | |
100 | * and the same sha1. Die if they have the same name but different | |
101 | * sha1s. | |
102 | */ | |
103 | static int is_dup_ref(const struct ref_entry *ref1, const struct ref_entry *ref2) | |
104 | { | |
105 | if (!strcmp(ref1->name, ref2->name)) { | |
106 | /* Duplicate name; make sure that the SHA1s match: */ | |
107 | if (hashcmp(ref1->sha1, ref2->sha1)) | |
108 | die("Duplicated ref, and SHA1s don't match: %s", | |
109 | ref1->name); | |
110 | warning("Duplicated ref: %s", ref1->name); | |
111 | return 1; | |
112 | } else { | |
113 | return 0; | |
114 | } | |
115 | } | |
116 | ||
e6ed3ca6 MH |
117 | /* |
118 | * Sort the entries in array (if they are not already sorted). | |
119 | */ | |
e9c4c111 JP |
120 | static void sort_ref_array(struct ref_array *array) |
121 | { | |
202a56a9 | 122 | int i, j; |
c774aab9 | 123 | |
e6ed3ca6 MH |
124 | /* |
125 | * This check also prevents passing a zero-length array to qsort(), | |
126 | * which is a problem on some platforms. | |
127 | */ | |
128 | if (array->sorted == array->nr) | |
e9c4c111 | 129 | return; |
c774aab9 | 130 | |
e9c4c111 | 131 | qsort(array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp); |
c774aab9 | 132 | |
e9c4c111 | 133 | /* Remove any duplicates from the ref_array */ |
202a56a9 MH |
134 | i = 0; |
135 | for (j = 1; j < array->nr; j++) { | |
136 | if (is_dup_ref(array->refs[i], array->refs[j])) { | |
137 | free(array->refs[j]); | |
e9c4c111 JP |
138 | continue; |
139 | } | |
202a56a9 | 140 | array->refs[++i] = array->refs[j]; |
e9c4c111 | 141 | } |
e6ed3ca6 | 142 | array->sorted = array->nr = i + 1; |
e9c4c111 | 143 | } |
c774aab9 | 144 | |
dfefa935 | 145 | static struct ref_entry *search_ref_array(struct ref_array *array, const char *refname) |
e9c4c111 JP |
146 | { |
147 | struct ref_entry *e, **r; | |
148 | int len; | |
c774aab9 | 149 | |
dfefa935 | 150 | if (refname == NULL) |
e9c4c111 | 151 | return NULL; |
c774aab9 | 152 | |
68729696 BC |
153 | if (!array->nr) |
154 | return NULL; | |
e6ed3ca6 | 155 | sort_ref_array(array); |
dfefa935 | 156 | len = strlen(refname) + 1; |
e9c4c111 | 157 | e = xmalloc(sizeof(struct ref_entry) + len); |
dfefa935 | 158 | memcpy(e->name, refname, len); |
c774aab9 | 159 | |
e9c4c111 | 160 | r = bsearch(&e, array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp); |
c774aab9 | 161 | |
e9c4c111 | 162 | free(e); |
c774aab9 | 163 | |
e9c4c111 JP |
164 | if (r == NULL) |
165 | return NULL; | |
c774aab9 | 166 | |
e9c4c111 | 167 | return *r; |
e1e22e37 LT |
168 | } |
169 | ||
5e290ff7 JH |
170 | /* |
171 | * Future: need to be in "struct repository" | |
172 | * when doing a full libification. | |
173 | */ | |
79c7ca54 MH |
174 | static struct ref_cache { |
175 | struct ref_cache *next; | |
5e290ff7 JH |
176 | char did_loose; |
177 | char did_packed; | |
e9c4c111 JP |
178 | struct ref_array loose; |
179 | struct ref_array packed; | |
ce40979c MH |
180 | /* The submodule name, or "" for the main repo. */ |
181 | char name[FLEX_ARRAY]; | |
79c7ca54 | 182 | } *ref_cache; |
0e88c130 | 183 | |
e9c4c111 | 184 | static struct ref_entry *current_ref; |
5e290ff7 | 185 | |
7c59511e | 186 | static void clear_ref_array(struct ref_array *array) |
5e290ff7 | 187 | { |
e9c4c111 JP |
188 | int i; |
189 | for (i = 0; i < array->nr; i++) | |
190 | free(array->refs[i]); | |
191 | free(array->refs); | |
e6ed3ca6 | 192 | array->sorted = array->nr = array->alloc = 0; |
e9c4c111 | 193 | array->refs = NULL; |
5e290ff7 JH |
194 | } |
195 | ||
760c4512 | 196 | static void clear_packed_ref_cache(struct ref_cache *refs) |
e1e22e37 | 197 | { |
1b7edaf9 | 198 | if (refs->did_packed) |
7c59511e | 199 | clear_ref_array(&refs->packed); |
760c4512 | 200 | refs->did_packed = 0; |
5e290ff7 | 201 | } |
e1e22e37 | 202 | |
760c4512 MH |
203 | static void clear_loose_ref_cache(struct ref_cache *refs) |
204 | { | |
205 | if (refs->did_loose) | |
7c59511e | 206 | clear_ref_array(&refs->loose); |
760c4512 MH |
207 | refs->did_loose = 0; |
208 | } | |
209 | ||
79c7ca54 | 210 | static struct ref_cache *create_ref_cache(const char *submodule) |
e5dbf605 | 211 | { |
ce40979c | 212 | int len; |
79c7ca54 | 213 | struct ref_cache *refs; |
ce40979c MH |
214 | if (!submodule) |
215 | submodule = ""; | |
216 | len = strlen(submodule) + 1; | |
79c7ca54 | 217 | refs = xcalloc(1, sizeof(struct ref_cache) + len); |
ce40979c | 218 | memcpy(refs->name, submodule, len); |
e5dbf605 MH |
219 | return refs; |
220 | } | |
221 | ||
4349a668 | 222 | /* |
79c7ca54 | 223 | * Return a pointer to a ref_cache for the specified submodule. For |
4349a668 MH |
224 | * the main repository, use submodule==NULL. The returned structure |
225 | * will be allocated and initialized but not necessarily populated; it | |
226 | * should not be freed. | |
227 | */ | |
79c7ca54 | 228 | static struct ref_cache *get_ref_cache(const char *submodule) |
4349a668 | 229 | { |
79c7ca54 | 230 | struct ref_cache *refs = ref_cache; |
0e88c130 MH |
231 | if (!submodule) |
232 | submodule = ""; | |
233 | while (refs) { | |
234 | if (!strcmp(submodule, refs->name)) | |
235 | return refs; | |
236 | refs = refs->next; | |
4349a668 | 237 | } |
0e88c130 | 238 | |
79c7ca54 MH |
239 | refs = create_ref_cache(submodule); |
240 | refs->next = ref_cache; | |
241 | ref_cache = refs; | |
0e88c130 | 242 | return refs; |
4349a668 MH |
243 | } |
244 | ||
8be8bde7 | 245 | void invalidate_ref_cache(const char *submodule) |
f130b116 | 246 | { |
c5f29abd MH |
247 | struct ref_cache *refs = get_ref_cache(submodule); |
248 | clear_packed_ref_cache(refs); | |
249 | clear_loose_ref_cache(refs); | |
5e290ff7 | 250 | } |
e1e22e37 | 251 | |
2c5c66be | 252 | static void read_packed_refs(FILE *f, struct ref_array *array) |
f4204ab9 | 253 | { |
e9c4c111 | 254 | struct ref_entry *last = NULL; |
f4204ab9 JH |
255 | char refline[PATH_MAX]; |
256 | int flag = REF_ISPACKED; | |
257 | ||
258 | while (fgets(refline, sizeof(refline), f)) { | |
259 | unsigned char sha1[20]; | |
dfefa935 | 260 | const char *refname; |
f4204ab9 JH |
261 | static const char header[] = "# pack-refs with:"; |
262 | ||
263 | if (!strncmp(refline, header, sizeof(header)-1)) { | |
264 | const char *traits = refline + sizeof(header) - 1; | |
265 | if (strstr(traits, " peeled ")) | |
266 | flag |= REF_KNOWS_PEELED; | |
267 | /* perhaps other traits later as well */ | |
268 | continue; | |
269 | } | |
270 | ||
dfefa935 MH |
271 | refname = parse_ref_line(refline, sha1); |
272 | if (refname) { | |
dd73ecd1 MH |
273 | last = create_ref_entry(refname, sha1, flag, 1); |
274 | add_ref(array, last); | |
f4204ab9 JH |
275 | continue; |
276 | } | |
277 | if (last && | |
278 | refline[0] == '^' && | |
279 | strlen(refline) == 42 && | |
280 | refline[41] == '\n' && | |
281 | !get_sha1_hex(refline + 1, sha1)) | |
282 | hashcpy(last->peeled, sha1); | |
283 | } | |
f4204ab9 JH |
284 | } |
285 | ||
316b097a | 286 | static struct ref_array *get_packed_refs(struct ref_cache *refs) |
5e290ff7 | 287 | { |
4349a668 MH |
288 | if (!refs->did_packed) { |
289 | const char *packed_refs_file; | |
290 | FILE *f; | |
0bad611b | 291 | |
316b097a MH |
292 | if (*refs->name) |
293 | packed_refs_file = git_path_submodule(refs->name, "packed-refs"); | |
4349a668 MH |
294 | else |
295 | packed_refs_file = git_path("packed-refs"); | |
296 | f = fopen(packed_refs_file, "r"); | |
e1e22e37 | 297 | if (f) { |
2c5c66be | 298 | read_packed_refs(f, &refs->packed); |
e1e22e37 | 299 | fclose(f); |
e1e22e37 | 300 | } |
0bad611b | 301 | refs->did_packed = 1; |
e1e22e37 | 302 | } |
e9c4c111 | 303 | return &refs->packed; |
e1e22e37 LT |
304 | } |
305 | ||
30249ee6 MH |
306 | void add_packed_ref(const char *refname, const unsigned char *sha1) |
307 | { | |
308 | add_ref(get_packed_refs(get_ref_cache(NULL)), | |
309 | create_ref_entry(refname, sha1, REF_ISPACKED, 1)); | |
310 | } | |
311 | ||
3b124823 | 312 | static void get_ref_dir(struct ref_cache *refs, const char *base, |
e9c4c111 | 313 | struct ref_array *array) |
e1e22e37 | 314 | { |
0bad611b HV |
315 | DIR *dir; |
316 | const char *path; | |
317 | ||
3b124823 MH |
318 | if (*refs->name) |
319 | path = git_path_submodule(refs->name, "%s", base); | |
0bad611b HV |
320 | else |
321 | path = git_path("%s", base); | |
322 | ||
323 | ||
324 | dir = opendir(path); | |
e1e22e37 LT |
325 | |
326 | if (dir) { | |
327 | struct dirent *de; | |
328 | int baselen = strlen(base); | |
dfefa935 | 329 | char *refname = xmalloc(baselen + 257); |
e1e22e37 | 330 | |
dfefa935 | 331 | memcpy(refname, base, baselen); |
e1e22e37 | 332 | if (baselen && base[baselen-1] != '/') |
dfefa935 | 333 | refname[baselen++] = '/'; |
e1e22e37 LT |
334 | |
335 | while ((de = readdir(dir)) != NULL) { | |
336 | unsigned char sha1[20]; | |
337 | struct stat st; | |
8da19775 | 338 | int flag; |
e1e22e37 | 339 | int namelen; |
0bad611b | 340 | const char *refdir; |
e1e22e37 LT |
341 | |
342 | if (de->d_name[0] == '.') | |
343 | continue; | |
344 | namelen = strlen(de->d_name); | |
345 | if (namelen > 255) | |
346 | continue; | |
347 | if (has_extension(de->d_name, ".lock")) | |
348 | continue; | |
dfefa935 | 349 | memcpy(refname + baselen, de->d_name, namelen+1); |
3b124823 MH |
350 | refdir = *refs->name |
351 | ? git_path_submodule(refs->name, "%s", refname) | |
dfefa935 | 352 | : git_path("%s", refname); |
0bad611b | 353 | if (stat(refdir, &st) < 0) |
e1e22e37 LT |
354 | continue; |
355 | if (S_ISDIR(st.st_mode)) { | |
3b124823 | 356 | get_ref_dir(refs, refname, array); |
e1e22e37 LT |
357 | continue; |
358 | } | |
3b124823 | 359 | if (*refs->name) { |
f8948e2f | 360 | hashclr(sha1); |
0bad611b | 361 | flag = 0; |
3b124823 | 362 | if (resolve_gitlink_ref(refs->name, refname, sha1) < 0) { |
0bad611b | 363 | hashclr(sha1); |
98ac34b2 | 364 | flag |= REF_ISBROKEN; |
0bad611b | 365 | } |
dfefa935 | 366 | } else if (read_ref_full(refname, sha1, 1, &flag)) { |
09116a1c JH |
367 | hashclr(sha1); |
368 | flag |= REF_ISBROKEN; | |
369 | } | |
dd73ecd1 | 370 | add_ref(array, create_ref_entry(refname, sha1, flag, 1)); |
e1e22e37 | 371 | } |
dfefa935 | 372 | free(refname); |
e1e22e37 LT |
373 | closedir(dir); |
374 | } | |
e1e22e37 LT |
375 | } |
376 | ||
f8948e2f | 377 | struct warn_if_dangling_data { |
3cf6134a | 378 | FILE *fp; |
f8948e2f JH |
379 | const char *refname; |
380 | const char *msg_fmt; | |
381 | }; | |
382 | ||
383 | static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1, | |
384 | int flags, void *cb_data) | |
385 | { | |
386 | struct warn_if_dangling_data *d = cb_data; | |
387 | const char *resolves_to; | |
388 | unsigned char junk[20]; | |
389 | ||
390 | if (!(flags & REF_ISSYMREF)) | |
391 | return 0; | |
392 | ||
8cad4744 | 393 | resolves_to = resolve_ref_unsafe(refname, junk, 0, NULL); |
f8948e2f JH |
394 | if (!resolves_to || strcmp(resolves_to, d->refname)) |
395 | return 0; | |
396 | ||
3cf6134a | 397 | fprintf(d->fp, d->msg_fmt, refname); |
f8948e2f JH |
398 | return 0; |
399 | } | |
400 | ||
3cf6134a | 401 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f8948e2f | 402 | { |
66dbfd55 GV |
403 | struct warn_if_dangling_data data; |
404 | ||
405 | data.fp = fp; | |
406 | data.refname = refname; | |
407 | data.msg_fmt = msg_fmt; | |
f8948e2f JH |
408 | for_each_rawref(warn_if_dangling_symref, &data); |
409 | } | |
410 | ||
316b097a | 411 | static struct ref_array *get_loose_refs(struct ref_cache *refs) |
e1e22e37 | 412 | { |
4349a668 | 413 | if (!refs->did_loose) { |
3b124823 | 414 | get_ref_dir(refs, "refs", &refs->loose); |
4349a668 | 415 | refs->did_loose = 1; |
e1e22e37 | 416 | } |
2c5c66be | 417 | return &refs->loose; |
e1e22e37 LT |
418 | } |
419 | ||
ca8db142 LT |
420 | /* We allow "recursive" symbolic refs. Only within reason, though */ |
421 | #define MAXDEPTH 5 | |
0ebde32c LT |
422 | #define MAXREFLEN (1024) |
423 | ||
e5fa45c1 JH |
424 | /* |
425 | * Called by resolve_gitlink_ref_recursive() after it failed to read | |
b0626608 MH |
426 | * from the loose refs in ref_cache refs. Find <refname> in the |
427 | * packed-refs file for the submodule. | |
e5fa45c1 | 428 | */ |
b0626608 | 429 | static int resolve_gitlink_packed_ref(struct ref_cache *refs, |
85be1fe3 | 430 | const char *refname, unsigned char *sha1) |
0ebde32c | 431 | { |
2c5c66be | 432 | struct ref_entry *ref; |
b0626608 | 433 | struct ref_array *array = get_packed_refs(refs); |
0ebde32c | 434 | |
2c5c66be | 435 | ref = search_ref_array(array, refname); |
b0626608 MH |
436 | if (ref == NULL) |
437 | return -1; | |
438 | ||
439 | memcpy(sha1, ref->sha1, 20); | |
440 | return 0; | |
0ebde32c LT |
441 | } |
442 | ||
b0626608 | 443 | static int resolve_gitlink_ref_recursive(struct ref_cache *refs, |
85be1fe3 | 444 | const char *refname, unsigned char *sha1, |
dfefa935 | 445 | int recursion) |
0ebde32c | 446 | { |
064d51dc | 447 | int fd, len; |
0ebde32c | 448 | char buffer[128], *p; |
064d51dc | 449 | char *path; |
0ebde32c | 450 | |
064d51dc | 451 | if (recursion > MAXDEPTH || strlen(refname) > MAXREFLEN) |
0ebde32c | 452 | return -1; |
064d51dc MH |
453 | path = *refs->name |
454 | ? git_path_submodule(refs->name, "%s", refname) | |
455 | : git_path("%s", refname); | |
456 | fd = open(path, O_RDONLY); | |
0ebde32c | 457 | if (fd < 0) |
b0626608 | 458 | return resolve_gitlink_packed_ref(refs, refname, sha1); |
0ebde32c LT |
459 | |
460 | len = read(fd, buffer, sizeof(buffer)-1); | |
461 | close(fd); | |
462 | if (len < 0) | |
463 | return -1; | |
464 | while (len && isspace(buffer[len-1])) | |
465 | len--; | |
466 | buffer[len] = 0; | |
467 | ||
468 | /* Was it a detached head or an old-fashioned symlink? */ | |
85be1fe3 | 469 | if (!get_sha1_hex(buffer, sha1)) |
0ebde32c LT |
470 | return 0; |
471 | ||
472 | /* Symref? */ | |
473 | if (strncmp(buffer, "ref:", 4)) | |
474 | return -1; | |
475 | p = buffer + 4; | |
476 | while (isspace(*p)) | |
477 | p++; | |
478 | ||
064d51dc | 479 | return resolve_gitlink_ref_recursive(refs, p, sha1, recursion+1); |
0ebde32c LT |
480 | } |
481 | ||
85be1fe3 | 482 | int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1) |
0ebde32c LT |
483 | { |
484 | int len = strlen(path), retval; | |
064d51dc | 485 | char *submodule; |
b0626608 | 486 | struct ref_cache *refs; |
0ebde32c LT |
487 | |
488 | while (len && path[len-1] == '/') | |
489 | len--; | |
490 | if (!len) | |
491 | return -1; | |
b0626608 MH |
492 | submodule = xstrndup(path, len); |
493 | refs = get_ref_cache(submodule); | |
494 | free(submodule); | |
495 | ||
064d51dc | 496 | retval = resolve_gitlink_ref_recursive(refs, refname, sha1, 0); |
0ebde32c LT |
497 | return retval; |
498 | } | |
ca8db142 | 499 | |
4886b89f | 500 | /* |
c224ca7f MH |
501 | * Try to read ref from the packed references. On success, set sha1 |
502 | * and return 0; otherwise, return -1. | |
4886b89f | 503 | */ |
dfefa935 | 504 | static int get_packed_ref(const char *refname, unsigned char *sha1) |
c224ca7f | 505 | { |
316b097a | 506 | struct ref_array *packed = get_packed_refs(get_ref_cache(NULL)); |
dfefa935 | 507 | struct ref_entry *entry = search_ref_array(packed, refname); |
2c5c66be JH |
508 | if (entry) { |
509 | hashcpy(sha1, entry->sha1); | |
510 | return 0; | |
c224ca7f MH |
511 | } |
512 | return -1; | |
513 | } | |
514 | ||
8d68493f | 515 | const char *resolve_ref_unsafe(const char *refname, unsigned char *sha1, int reading, int *flag) |
8a65ff76 | 516 | { |
0104ca09 HO |
517 | int depth = MAXDEPTH; |
518 | ssize_t len; | |
a876ed83 | 519 | char buffer[256]; |
dfefa935 | 520 | static char refname_buffer[256]; |
ca8db142 | 521 | |
8da19775 JH |
522 | if (flag) |
523 | *flag = 0; | |
524 | ||
dfefa935 | 525 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) |
8384d788 MH |
526 | return NULL; |
527 | ||
a876ed83 | 528 | for (;;) { |
55956350 | 529 | char path[PATH_MAX]; |
a876ed83 JH |
530 | struct stat st; |
531 | char *buf; | |
532 | int fd; | |
8a65ff76 | 533 | |
a876ed83 JH |
534 | if (--depth < 0) |
535 | return NULL; | |
ca8db142 | 536 | |
dfefa935 | 537 | git_snpath(path, sizeof(path), "%s", refname); |
c224ca7f | 538 | |
a876ed83 | 539 | if (lstat(path, &st) < 0) { |
c224ca7f MH |
540 | if (errno != ENOENT) |
541 | return NULL; | |
542 | /* | |
543 | * The loose reference file does not exist; | |
544 | * check for a packed reference. | |
545 | */ | |
dfefa935 | 546 | if (!get_packed_ref(refname, sha1)) { |
c224ca7f MH |
547 | if (flag) |
548 | *flag |= REF_ISPACKED; | |
dfefa935 | 549 | return refname; |
434cd0cd | 550 | } |
c224ca7f MH |
551 | /* The reference is not a packed reference, either. */ |
552 | if (reading) { | |
a876ed83 | 553 | return NULL; |
c224ca7f MH |
554 | } else { |
555 | hashclr(sha1); | |
dfefa935 | 556 | return refname; |
c224ca7f | 557 | } |
a876ed83 | 558 | } |
ca8db142 | 559 | |
a876ed83 JH |
560 | /* Follow "normalized" - ie "refs/.." symlinks by hand */ |
561 | if (S_ISLNK(st.st_mode)) { | |
562 | len = readlink(path, buffer, sizeof(buffer)-1); | |
7bb2bf8e MH |
563 | if (len < 0) |
564 | return NULL; | |
b54cb795 | 565 | buffer[len] = 0; |
1f58a038 MH |
566 | if (!prefixcmp(buffer, "refs/") && |
567 | !check_refname_format(buffer, 0)) { | |
dfefa935 MH |
568 | strcpy(refname_buffer, buffer); |
569 | refname = refname_buffer; | |
8da19775 JH |
570 | if (flag) |
571 | *flag |= REF_ISSYMREF; | |
a876ed83 JH |
572 | continue; |
573 | } | |
ca8db142 | 574 | } |
a876ed83 | 575 | |
7a21632f DS |
576 | /* Is it a directory? */ |
577 | if (S_ISDIR(st.st_mode)) { | |
578 | errno = EISDIR; | |
579 | return NULL; | |
580 | } | |
581 | ||
a876ed83 JH |
582 | /* |
583 | * Anything else, just open it and try to use it as | |
584 | * a ref | |
585 | */ | |
586 | fd = open(path, O_RDONLY); | |
587 | if (fd < 0) | |
588 | return NULL; | |
93d26e4c | 589 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
a876ed83 | 590 | close(fd); |
28775050 MH |
591 | if (len < 0) |
592 | return NULL; | |
593 | while (len && isspace(buffer[len-1])) | |
594 | len--; | |
595 | buffer[len] = '\0'; | |
a876ed83 JH |
596 | |
597 | /* | |
598 | * Is it a symbolic ref? | |
599 | */ | |
28775050 | 600 | if (prefixcmp(buffer, "ref:")) |
a876ed83 | 601 | break; |
55956350 JH |
602 | if (flag) |
603 | *flag |= REF_ISSYMREF; | |
a876ed83 | 604 | buf = buffer + 4; |
28775050 MH |
605 | while (isspace(*buf)) |
606 | buf++; | |
313fb010 | 607 | if (check_refname_format(buf, REFNAME_ALLOW_ONELEVEL)) { |
55956350 JH |
608 | if (flag) |
609 | *flag |= REF_ISBROKEN; | |
313fb010 MH |
610 | return NULL; |
611 | } | |
dfefa935 | 612 | refname = strcpy(refname_buffer, buf); |
8a65ff76 | 613 | } |
f989fea0 MH |
614 | /* Please note that FETCH_HEAD has a second line containing other data. */ |
615 | if (get_sha1_hex(buffer, sha1) || (buffer[40] != '\0' && !isspace(buffer[40]))) { | |
55956350 JH |
616 | if (flag) |
617 | *flag |= REF_ISBROKEN; | |
a876ed83 | 618 | return NULL; |
629cd3ac | 619 | } |
dfefa935 | 620 | return refname; |
a876ed83 JH |
621 | } |
622 | ||
96ec7b1e NTND |
623 | char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag) |
624 | { | |
8cad4744 | 625 | const char *ret = resolve_ref_unsafe(ref, sha1, reading, flag); |
96ec7b1e NTND |
626 | return ret ? xstrdup(ret) : NULL; |
627 | } | |
628 | ||
d08bae7e IL |
629 | /* The argument to filter_refs */ |
630 | struct ref_filter { | |
631 | const char *pattern; | |
632 | each_ref_fn *fn; | |
633 | void *cb_data; | |
634 | }; | |
635 | ||
dfefa935 | 636 | int read_ref_full(const char *refname, unsigned char *sha1, int reading, int *flags) |
a876ed83 | 637 | { |
8d68493f | 638 | if (resolve_ref_unsafe(refname, sha1, reading, flags)) |
a876ed83 JH |
639 | return 0; |
640 | return -1; | |
8a65ff76 LT |
641 | } |
642 | ||
dfefa935 | 643 | int read_ref(const char *refname, unsigned char *sha1) |
c6893323 | 644 | { |
dfefa935 | 645 | return read_ref_full(refname, sha1, 1, NULL); |
c6893323 NTND |
646 | } |
647 | ||
f8948e2f | 648 | #define DO_FOR_EACH_INCLUDE_BROKEN 01 |
ef06b918 | 649 | static int do_one_ref(const char *base, each_ref_fn fn, int trim, |
e9c4c111 | 650 | int flags, void *cb_data, struct ref_entry *entry) |
ef06b918 | 651 | { |
b3cfc406 | 652 | if (prefixcmp(entry->name, base)) |
ef06b918 | 653 | return 0; |
e01de1c9 | 654 | |
f8948e2f | 655 | if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { |
98ac34b2 JH |
656 | if (entry->flag & REF_ISBROKEN) |
657 | return 0; /* ignore broken refs e.g. dangling symref */ | |
f8948e2f JH |
658 | if (!has_sha1_file(entry->sha1)) { |
659 | error("%s does not point to a valid object!", entry->name); | |
660 | return 0; | |
661 | } | |
ef06b918 | 662 | } |
0ae91be0 | 663 | current_ref = entry; |
ef06b918 JH |
664 | return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); |
665 | } | |
666 | ||
85be1fe3 | 667 | static int filter_refs(const char *refname, const unsigned char *sha1, int flags, |
dfefa935 | 668 | void *data) |
d08bae7e IL |
669 | { |
670 | struct ref_filter *filter = (struct ref_filter *)data; | |
dfefa935 | 671 | if (fnmatch(filter->pattern, refname, 0)) |
d08bae7e | 672 | return 0; |
85be1fe3 | 673 | return filter->fn(refname, sha1, flags, filter->cb_data); |
d08bae7e IL |
674 | } |
675 | ||
dfefa935 | 676 | int peel_ref(const char *refname, unsigned char *sha1) |
cf0adba7 JH |
677 | { |
678 | int flag; | |
679 | unsigned char base[20]; | |
680 | struct object *o; | |
681 | ||
dfefa935 MH |
682 | if (current_ref && (current_ref->name == refname |
683 | || !strcmp(current_ref->name, refname))) { | |
0ae91be0 SP |
684 | if (current_ref->flag & REF_KNOWS_PEELED) { |
685 | hashcpy(sha1, current_ref->peeled); | |
686 | return 0; | |
687 | } | |
688 | hashcpy(base, current_ref->sha1); | |
689 | goto fallback; | |
690 | } | |
691 | ||
dfefa935 | 692 | if (read_ref_full(refname, base, 1, &flag)) |
cf0adba7 JH |
693 | return -1; |
694 | ||
695 | if ((flag & REF_ISPACKED)) { | |
316b097a | 696 | struct ref_array *array = get_packed_refs(get_ref_cache(NULL)); |
dfefa935 | 697 | struct ref_entry *r = search_ref_array(array, refname); |
cf0adba7 | 698 | |
e9c4c111 JP |
699 | if (r != NULL && r->flag & REF_KNOWS_PEELED) { |
700 | hashcpy(sha1, r->peeled); | |
701 | return 0; | |
cf0adba7 | 702 | } |
cf0adba7 JH |
703 | } |
704 | ||
0ae91be0 | 705 | fallback: |
cf0adba7 | 706 | o = parse_object(base); |
8c87dc77 | 707 | if (o && o->type == OBJ_TAG) { |
dfefa935 | 708 | o = deref_tag(o, refname, 0); |
cf0adba7 JH |
709 | if (o) { |
710 | hashcpy(sha1, o->sha1); | |
711 | return 0; | |
712 | } | |
713 | } | |
714 | return -1; | |
715 | } | |
716 | ||
0bad611b HV |
717 | static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn, |
718 | int trim, int flags, void *cb_data) | |
8a65ff76 | 719 | { |
cf6672ed | 720 | int retval = 0, p = 0, l = 0; |
316b097a MH |
721 | struct ref_cache *refs = get_ref_cache(submodule); |
722 | struct ref_array *packed = get_packed_refs(refs); | |
723 | struct ref_array *loose = get_loose_refs(refs); | |
8a65ff76 | 724 | |
e6ed3ca6 MH |
725 | sort_ref_array(packed); |
726 | sort_ref_array(loose); | |
e9c4c111 JP |
727 | while (p < packed->nr && l < loose->nr) { |
728 | struct ref_entry *entry; | |
729 | int cmp = strcmp(packed->refs[p]->name, loose->refs[l]->name); | |
e1e22e37 | 730 | if (!cmp) { |
e9c4c111 | 731 | p++; |
e1e22e37 | 732 | continue; |
6cada6a9 | 733 | } |
e1e22e37 | 734 | if (cmp > 0) { |
e9c4c111 | 735 | entry = loose->refs[l++]; |
e1e22e37 | 736 | } else { |
e9c4c111 | 737 | entry = packed->refs[p++]; |
e1e22e37 | 738 | } |
f8948e2f | 739 | retval = do_one_ref(base, fn, trim, flags, cb_data, entry); |
e1e22e37 | 740 | if (retval) |
0ae91be0 | 741 | goto end_each; |
e1e22e37 | 742 | } |
8a65ff76 | 743 | |
e9c4c111 JP |
744 | if (l < loose->nr) { |
745 | p = l; | |
746 | packed = loose; | |
747 | } | |
748 | ||
749 | for (; p < packed->nr; p++) { | |
750 | retval = do_one_ref(base, fn, trim, flags, cb_data, packed->refs[p]); | |
ef06b918 | 751 | if (retval) |
0ae91be0 | 752 | goto end_each; |
8a65ff76 | 753 | } |
0ae91be0 SP |
754 | |
755 | end_each: | |
756 | current_ref = NULL; | |
757 | return retval; | |
8a65ff76 LT |
758 | } |
759 | ||
0bad611b HV |
760 | |
761 | static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data) | |
723c31fe LT |
762 | { |
763 | unsigned char sha1[20]; | |
8da19775 JH |
764 | int flag; |
765 | ||
0bad611b HV |
766 | if (submodule) { |
767 | if (resolve_gitlink_ref(submodule, "HEAD", sha1) == 0) | |
768 | return fn("HEAD", sha1, 0, cb_data); | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
c6893323 | 773 | if (!read_ref_full("HEAD", sha1, 1, &flag)) |
8da19775 | 774 | return fn("HEAD", sha1, flag, cb_data); |
0bad611b | 775 | |
2f34ba32 | 776 | return 0; |
723c31fe LT |
777 | } |
778 | ||
0bad611b HV |
779 | int head_ref(each_ref_fn fn, void *cb_data) |
780 | { | |
781 | return do_head_ref(NULL, fn, cb_data); | |
782 | } | |
783 | ||
9ef6aeb0 HV |
784 | int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
785 | { | |
786 | return do_head_ref(submodule, fn, cb_data); | |
787 | } | |
788 | ||
cb5d709f | 789 | int for_each_ref(each_ref_fn fn, void *cb_data) |
8a65ff76 | 790 | { |
b3cfc406 | 791 | return do_for_each_ref(NULL, "", fn, 0, 0, cb_data); |
a62be77f SE |
792 | } |
793 | ||
9ef6aeb0 HV |
794 | int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
795 | { | |
b3cfc406 | 796 | return do_for_each_ref(submodule, "", fn, 0, 0, cb_data); |
a62be77f SE |
797 | } |
798 | ||
2a8177b6 CC |
799 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) |
800 | { | |
0bad611b | 801 | return do_for_each_ref(NULL, prefix, fn, strlen(prefix), 0, cb_data); |
2a8177b6 CC |
802 | } |
803 | ||
9ef6aeb0 HV |
804 | int for_each_ref_in_submodule(const char *submodule, const char *prefix, |
805 | each_ref_fn fn, void *cb_data) | |
806 | { | |
807 | return do_for_each_ref(submodule, prefix, fn, strlen(prefix), 0, cb_data); | |
2a8177b6 CC |
808 | } |
809 | ||
cb5d709f | 810 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 811 | { |
2a8177b6 | 812 | return for_each_ref_in("refs/tags/", fn, cb_data); |
a62be77f SE |
813 | } |
814 | ||
9ef6aeb0 HV |
815 | int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
816 | { | |
817 | return for_each_ref_in_submodule(submodule, "refs/tags/", fn, cb_data); | |
818 | } | |
819 | ||
cb5d709f | 820 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 821 | { |
2a8177b6 | 822 | return for_each_ref_in("refs/heads/", fn, cb_data); |
a62be77f SE |
823 | } |
824 | ||
9ef6aeb0 HV |
825 | int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
826 | { | |
827 | return for_each_ref_in_submodule(submodule, "refs/heads/", fn, cb_data); | |
828 | } | |
829 | ||
cb5d709f | 830 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 831 | { |
2a8177b6 | 832 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
f8948e2f JH |
833 | } |
834 | ||
9ef6aeb0 HV |
835 | int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
836 | { | |
837 | return for_each_ref_in_submodule(submodule, "refs/remotes/", fn, cb_data); | |
838 | } | |
839 | ||
29268700 CC |
840 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) |
841 | { | |
0bad611b | 842 | return do_for_each_ref(NULL, "refs/replace/", fn, 13, 0, cb_data); |
29268700 CC |
843 | } |
844 | ||
a1bea2c1 JT |
845 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) |
846 | { | |
847 | struct strbuf buf = STRBUF_INIT; | |
848 | int ret = 0; | |
849 | unsigned char sha1[20]; | |
850 | int flag; | |
851 | ||
852 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); | |
c6893323 | 853 | if (!read_ref_full(buf.buf, sha1, 1, &flag)) |
a1bea2c1 JT |
854 | ret = fn(buf.buf, sha1, flag, cb_data); |
855 | strbuf_release(&buf); | |
856 | ||
857 | return ret; | |
858 | } | |
859 | ||
860 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
861 | { | |
862 | struct strbuf buf = STRBUF_INIT; | |
863 | int ret; | |
864 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
865 | ret = do_for_each_ref(NULL, buf.buf, fn, 0, 0, cb_data); | |
866 | strbuf_release(&buf); | |
867 | return ret; | |
868 | } | |
869 | ||
b09fe971 IL |
870 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
871 | const char *prefix, void *cb_data) | |
d08bae7e IL |
872 | { |
873 | struct strbuf real_pattern = STRBUF_INIT; | |
874 | struct ref_filter filter; | |
d08bae7e IL |
875 | int ret; |
876 | ||
b09fe971 | 877 | if (!prefix && prefixcmp(pattern, "refs/")) |
d08bae7e | 878 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
879 | else if (prefix) |
880 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
881 | strbuf_addstr(&real_pattern, pattern); |
882 | ||
894a9d33 | 883 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 884 | /* Append implied '/' '*' if not present. */ |
d08bae7e IL |
885 | if (real_pattern.buf[real_pattern.len - 1] != '/') |
886 | strbuf_addch(&real_pattern, '/'); | |
887 | /* No need to check for '*', there is none. */ | |
888 | strbuf_addch(&real_pattern, '*'); | |
889 | } | |
890 | ||
891 | filter.pattern = real_pattern.buf; | |
892 | filter.fn = fn; | |
893 | filter.cb_data = cb_data; | |
894 | ret = for_each_ref(filter_refs, &filter); | |
895 | ||
896 | strbuf_release(&real_pattern); | |
897 | return ret; | |
898 | } | |
899 | ||
b09fe971 IL |
900 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
901 | { | |
902 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
903 | } | |
904 | ||
f8948e2f JH |
905 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
906 | { | |
b3cfc406 | 907 | return do_for_each_ref(NULL, "", fn, 0, |
f8948e2f | 908 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); |
8a65ff76 LT |
909 | } |
910 | ||
03feddd6 JH |
911 | /* |
912 | * Make sure "ref" is something reasonable to have under ".git/refs/"; | |
913 | * We do not like it if: | |
914 | * | |
915 | * - any path component of it begins with ".", or | |
916 | * - it has double dots "..", or | |
917 | * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or | |
918 | * - it ends with a "/". | |
3e262b95 | 919 | * - it ends with ".lock" |
a4c2e699 | 920 | * - it contains a "\" (backslash) |
03feddd6 JH |
921 | */ |
922 | ||
9224b73b | 923 | /* Return true iff ch is not allowed in reference names. */ |
03feddd6 JH |
924 | static inline int bad_ref_char(int ch) |
925 | { | |
f3738c1c | 926 | if (((unsigned) ch) <= ' ' || ch == 0x7f || |
a4c2e699 | 927 | ch == '~' || ch == '^' || ch == ':' || ch == '\\') |
8558fd9e DB |
928 | return 1; |
929 | /* 2.13 Pattern Matching Notation */ | |
9224b73b | 930 | if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */ |
8558fd9e | 931 | return 1; |
8558fd9e | 932 | return 0; |
03feddd6 JH |
933 | } |
934 | ||
49295d4e | 935 | /* |
dfefa935 | 936 | * Try to read one refname component from the front of refname. Return |
49295d4e MH |
937 | * the length of the component found, or -1 if the component is not |
938 | * legal. | |
939 | */ | |
dfefa935 | 940 | static int check_refname_component(const char *refname, int flags) |
95fc7512 | 941 | { |
49295d4e MH |
942 | const char *cp; |
943 | char last = '\0'; | |
03feddd6 | 944 | |
dfefa935 | 945 | for (cp = refname; ; cp++) { |
49295d4e MH |
946 | char ch = *cp; |
947 | if (ch == '\0' || ch == '/') | |
948 | break; | |
949 | if (bad_ref_char(ch)) | |
950 | return -1; /* Illegal character in refname. */ | |
951 | if (last == '.' && ch == '.') | |
952 | return -1; /* Refname contains "..". */ | |
953 | if (last == '@' && ch == '{') | |
954 | return -1; /* Refname contains "@{". */ | |
cbdffe40 | 955 | last = ch; |
49295d4e | 956 | } |
dfefa935 | 957 | if (cp == refname) |
49295d4e | 958 | return -1; /* Component has zero length. */ |
dfefa935 | 959 | if (refname[0] == '.') { |
dce4bab6 MH |
960 | if (!(flags & REFNAME_DOT_COMPONENT)) |
961 | return -1; /* Component starts with '.'. */ | |
962 | /* | |
963 | * Even if leading dots are allowed, don't allow "." | |
964 | * as a component (".." is prevented by a rule above). | |
965 | */ | |
dfefa935 | 966 | if (refname[1] == '\0') |
dce4bab6 MH |
967 | return -1; /* Component equals ".". */ |
968 | } | |
dfefa935 | 969 | if (cp - refname >= 5 && !memcmp(cp - 5, ".lock", 5)) |
7e9d2fe9 | 970 | return -1; /* Refname ends with ".lock". */ |
dfefa935 | 971 | return cp - refname; |
49295d4e MH |
972 | } |
973 | ||
dfefa935 | 974 | int check_refname_format(const char *refname, int flags) |
95fc7512 | 975 | { |
49295d4e | 976 | int component_len, component_count = 0; |
03feddd6 | 977 | |
03feddd6 | 978 | while (1) { |
49295d4e | 979 | /* We are at the start of a path component. */ |
dfefa935 | 980 | component_len = check_refname_component(refname, flags); |
49295d4e MH |
981 | if (component_len < 0) { |
982 | if ((flags & REFNAME_REFSPEC_PATTERN) && | |
dfefa935 MH |
983 | refname[0] == '*' && |
984 | (refname[1] == '\0' || refname[1] == '/')) { | |
8d9c5010 MH |
985 | /* Accept one wildcard as a full refname component. */ |
986 | flags &= ~REFNAME_REFSPEC_PATTERN; | |
49295d4e MH |
987 | component_len = 1; |
988 | } else { | |
8d9c5010 | 989 | return -1; |
49295d4e | 990 | } |
03feddd6 | 991 | } |
49295d4e | 992 | component_count++; |
dfefa935 | 993 | if (refname[component_len] == '\0') |
49295d4e MH |
994 | break; |
995 | /* Skip to next component. */ | |
dfefa935 | 996 | refname += component_len + 1; |
03feddd6 | 997 | } |
49295d4e | 998 | |
dfefa935 | 999 | if (refname[component_len - 1] == '.') |
49295d4e | 1000 | return -1; /* Refname ends with '.'. */ |
49295d4e MH |
1001 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) |
1002 | return -1; /* Refname has only one component. */ | |
1003 | return 0; | |
95fc7512 DB |
1004 | } |
1005 | ||
4577e483 | 1006 | const char *prettify_refname(const char *name) |
a9c37a72 | 1007 | { |
a9c37a72 DB |
1008 | return name + ( |
1009 | !prefixcmp(name, "refs/heads/") ? 11 : | |
1010 | !prefixcmp(name, "refs/tags/") ? 10 : | |
1011 | !prefixcmp(name, "refs/remotes/") ? 13 : | |
1012 | 0); | |
1013 | } | |
1014 | ||
79803322 SP |
1015 | const char *ref_rev_parse_rules[] = { |
1016 | "%.*s", | |
1017 | "refs/%.*s", | |
1018 | "refs/tags/%.*s", | |
1019 | "refs/heads/%.*s", | |
1020 | "refs/remotes/%.*s", | |
1021 | "refs/remotes/%.*s/HEAD", | |
1022 | NULL | |
1023 | }; | |
1024 | ||
1025 | int refname_match(const char *abbrev_name, const char *full_name, const char **rules) | |
1026 | { | |
1027 | const char **p; | |
1028 | const int abbrev_name_len = strlen(abbrev_name); | |
1029 | ||
1030 | for (p = rules; *p; p++) { | |
1031 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { | |
1032 | return 1; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | return 0; | |
1037 | } | |
1038 | ||
e5f38ec3 | 1039 | static struct ref_lock *verify_lock(struct ref_lock *lock, |
4bd18c43 SP |
1040 | const unsigned char *old_sha1, int mustexist) |
1041 | { | |
c6893323 | 1042 | if (read_ref_full(lock->ref_name, lock->old_sha1, mustexist, NULL)) { |
434cd0cd | 1043 | error("Can't verify ref %s", lock->ref_name); |
4bd18c43 SP |
1044 | unlock_ref(lock); |
1045 | return NULL; | |
1046 | } | |
a89fccd2 | 1047 | if (hashcmp(lock->old_sha1, old_sha1)) { |
434cd0cd | 1048 | error("Ref %s is at %s but expected %s", lock->ref_name, |
4bd18c43 SP |
1049 | sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1)); |
1050 | unlock_ref(lock); | |
1051 | return NULL; | |
1052 | } | |
1053 | return lock; | |
1054 | } | |
1055 | ||
7155b727 | 1056 | static int remove_empty_directories(const char *file) |
bc7127ef JH |
1057 | { |
1058 | /* we want to create a file but there is a directory there; | |
1059 | * if that is an empty directory (or a directory that contains | |
1060 | * only empty directories), remove them. | |
1061 | */ | |
7155b727 JS |
1062 | struct strbuf path; |
1063 | int result; | |
bc7127ef | 1064 | |
7155b727 JS |
1065 | strbuf_init(&path, 20); |
1066 | strbuf_addstr(&path, file); | |
1067 | ||
a0f4afbe | 1068 | result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY); |
7155b727 JS |
1069 | |
1070 | strbuf_release(&path); | |
1071 | ||
1072 | return result; | |
bc7127ef JH |
1073 | } |
1074 | ||
19b68b1e MH |
1075 | /* |
1076 | * Return true iff a reference named refname could be created without | |
1077 | * conflicting with the name of an existing reference. If oldrefname | |
1078 | * is non-NULL, ignore potential conflicts with oldrefname (e.g., | |
1079 | * because oldrefname is scheduled for deletion in the same | |
1080 | * operation). | |
1081 | */ | |
dfefa935 | 1082 | static int is_refname_available(const char *refname, const char *oldrefname, |
19b68b1e | 1083 | struct ref_array *array) |
c976d415 | 1084 | { |
dfefa935 | 1085 | int i, namlen = strlen(refname); /* e.g. 'foo/bar' */ |
e9c4c111 JP |
1086 | for (i = 0; i < array->nr; i++ ) { |
1087 | struct ref_entry *entry = array->refs[i]; | |
1088 | /* entry->name could be 'foo' or 'foo/bar/baz' */ | |
dfefa935 | 1089 | if (!oldrefname || strcmp(oldrefname, entry->name)) { |
e9c4c111 | 1090 | int len = strlen(entry->name); |
c976d415 | 1091 | int cmplen = (namlen < len) ? namlen : len; |
dfefa935 MH |
1092 | const char *lead = (namlen < len) ? entry->name : refname; |
1093 | if (!strncmp(refname, entry->name, cmplen) && | |
c976d415 | 1094 | lead[cmplen] == '/') { |
19b68b1e MH |
1095 | error("'%s' exists; cannot create '%s'", |
1096 | entry->name, refname); | |
c976d415 LH |
1097 | return 0; |
1098 | } | |
1099 | } | |
c976d415 LH |
1100 | } |
1101 | return 1; | |
1102 | } | |
1103 | ||
ff74f7f1 JH |
1104 | /* |
1105 | * *string and *len will only be substituted, and *string returned (for | |
1106 | * later free()ing) if the string passed in is a magic short-hand form | |
1107 | * to name a branch. | |
1108 | */ | |
1109 | static char *substitute_branch_name(const char **string, int *len) | |
1110 | { | |
1111 | struct strbuf buf = STRBUF_INIT; | |
1112 | int ret = interpret_branch_name(*string, &buf); | |
1113 | ||
1114 | if (ret == *len) { | |
1115 | size_t size; | |
1116 | *string = strbuf_detach(&buf, &size); | |
1117 | *len = size; | |
1118 | return (char *)*string; | |
1119 | } | |
1120 | ||
1121 | return NULL; | |
1122 | } | |
1123 | ||
1124 | int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
1125 | { | |
1126 | char *last_branch = substitute_branch_name(&str, &len); | |
1127 | const char **p, *r; | |
1128 | int refs_found = 0; | |
1129 | ||
1130 | *ref = NULL; | |
1131 | for (p = ref_rev_parse_rules; *p; p++) { | |
1132 | char fullref[PATH_MAX]; | |
1133 | unsigned char sha1_from_ref[20]; | |
1134 | unsigned char *this_result; | |
1135 | int flag; | |
1136 | ||
1137 | this_result = refs_found ? sha1_from_ref : sha1; | |
1138 | mksnpath(fullref, sizeof(fullref), *p, len, str); | |
8cad4744 | 1139 | r = resolve_ref_unsafe(fullref, this_result, 1, &flag); |
ff74f7f1 JH |
1140 | if (r) { |
1141 | if (!refs_found++) | |
1142 | *ref = xstrdup(r); | |
1143 | if (!warn_ambiguous_refs) | |
1144 | break; | |
55956350 | 1145 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD")) { |
ff74f7f1 | 1146 | warning("ignoring dangling symref %s.", fullref); |
55956350 JH |
1147 | } else if ((flag & REF_ISBROKEN) && strchr(fullref, '/')) { |
1148 | warning("ignoring broken ref %s.", fullref); | |
1149 | } | |
ff74f7f1 JH |
1150 | } |
1151 | free(last_branch); | |
1152 | return refs_found; | |
1153 | } | |
1154 | ||
1155 | int dwim_log(const char *str, int len, unsigned char *sha1, char **log) | |
1156 | { | |
1157 | char *last_branch = substitute_branch_name(&str, &len); | |
1158 | const char **p; | |
1159 | int logs_found = 0; | |
1160 | ||
1161 | *log = NULL; | |
1162 | for (p = ref_rev_parse_rules; *p; p++) { | |
1163 | struct stat st; | |
1164 | unsigned char hash[20]; | |
1165 | char path[PATH_MAX]; | |
1166 | const char *ref, *it; | |
1167 | ||
1168 | mksnpath(path, sizeof(path), *p, len, str); | |
8cad4744 | 1169 | ref = resolve_ref_unsafe(path, hash, 1, NULL); |
ff74f7f1 JH |
1170 | if (!ref) |
1171 | continue; | |
1172 | if (!stat(git_path("logs/%s", path), &st) && | |
1173 | S_ISREG(st.st_mode)) | |
1174 | it = path; | |
1175 | else if (strcmp(ref, path) && | |
1176 | !stat(git_path("logs/%s", ref), &st) && | |
1177 | S_ISREG(st.st_mode)) | |
1178 | it = ref; | |
1179 | else | |
1180 | continue; | |
1181 | if (!logs_found++) { | |
1182 | *log = xstrdup(it); | |
1183 | hashcpy(sha1, hash); | |
1184 | } | |
1185 | if (!warn_ambiguous_refs) | |
1186 | break; | |
1187 | } | |
1188 | free(last_branch); | |
1189 | return logs_found; | |
1190 | } | |
1191 | ||
dfefa935 MH |
1192 | static struct ref_lock *lock_ref_sha1_basic(const char *refname, |
1193 | const unsigned char *old_sha1, | |
1194 | int flags, int *type_p) | |
4bd18c43 | 1195 | { |
434cd0cd | 1196 | char *ref_file; |
dfefa935 | 1197 | const char *orig_refname = refname; |
4bd18c43 | 1198 | struct ref_lock *lock; |
5cc3cef9 | 1199 | int last_errno = 0; |
acd3b9ec | 1200 | int type, lflags; |
4431fcc4 | 1201 | int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); |
5bdd8d4a | 1202 | int missing = 0; |
4bd18c43 SP |
1203 | |
1204 | lock = xcalloc(1, sizeof(struct ref_lock)); | |
1205 | lock->lock_fd = -1; | |
1206 | ||
8d68493f | 1207 | refname = resolve_ref_unsafe(refname, lock->old_sha1, mustexist, &type); |
dfefa935 | 1208 | if (!refname && errno == EISDIR) { |
bc7127ef JH |
1209 | /* we are trying to lock foo but we used to |
1210 | * have foo/bar which now does not exist; | |
1211 | * it is normal for the empty directory 'foo' | |
1212 | * to remain. | |
1213 | */ | |
dfefa935 | 1214 | ref_file = git_path("%s", orig_refname); |
5cc3cef9 JH |
1215 | if (remove_empty_directories(ref_file)) { |
1216 | last_errno = errno; | |
dfefa935 | 1217 | error("there are still refs under '%s'", orig_refname); |
5cc3cef9 JH |
1218 | goto error_return; |
1219 | } | |
8d68493f | 1220 | refname = resolve_ref_unsafe(orig_refname, lock->old_sha1, mustexist, &type); |
bc7127ef | 1221 | } |
68db31cc SV |
1222 | if (type_p) |
1223 | *type_p = type; | |
dfefa935 | 1224 | if (!refname) { |
5cc3cef9 | 1225 | last_errno = errno; |
818f477c | 1226 | error("unable to resolve reference %s: %s", |
dfefa935 | 1227 | orig_refname, strerror(errno)); |
5cc3cef9 | 1228 | goto error_return; |
4bd18c43 | 1229 | } |
5bdd8d4a | 1230 | missing = is_null_sha1(lock->old_sha1); |
c976d415 LH |
1231 | /* When the ref did not exist and we are creating it, |
1232 | * make sure there is no existing ref that is packed | |
1233 | * whose name begins with our refname, nor a ref whose | |
1234 | * name is a proper prefix of our refname. | |
1235 | */ | |
5bdd8d4a | 1236 | if (missing && |
316b097a | 1237 | !is_refname_available(refname, NULL, get_packed_refs(get_ref_cache(NULL)))) { |
f475e08e | 1238 | last_errno = ENOTDIR; |
c976d415 | 1239 | goto error_return; |
f475e08e | 1240 | } |
22a3844e | 1241 | |
c33d5174 | 1242 | lock->lk = xcalloc(1, sizeof(struct lock_file)); |
4bd18c43 | 1243 | |
acd3b9ec JH |
1244 | lflags = LOCK_DIE_ON_ERROR; |
1245 | if (flags & REF_NODEREF) { | |
dfefa935 | 1246 | refname = orig_refname; |
acd3b9ec JH |
1247 | lflags |= LOCK_NODEREF; |
1248 | } | |
dfefa935 MH |
1249 | lock->ref_name = xstrdup(refname); |
1250 | lock->orig_ref_name = xstrdup(orig_refname); | |
1251 | ref_file = git_path("%s", refname); | |
5bdd8d4a | 1252 | if (missing) |
68db31cc SV |
1253 | lock->force_write = 1; |
1254 | if ((flags & REF_NODEREF) && (type & REF_ISSYMREF)) | |
1255 | lock->force_write = 1; | |
4bd18c43 | 1256 | |
5cc3cef9 JH |
1257 | if (safe_create_leading_directories(ref_file)) { |
1258 | last_errno = errno; | |
1259 | error("unable to create directory for %s", ref_file); | |
1260 | goto error_return; | |
1261 | } | |
4bd18c43 | 1262 | |
acd3b9ec | 1263 | lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags); |
4bd18c43 | 1264 | return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock; |
5cc3cef9 JH |
1265 | |
1266 | error_return: | |
1267 | unlock_ref(lock); | |
1268 | errno = last_errno; | |
1269 | return NULL; | |
4bd18c43 SP |
1270 | } |
1271 | ||
dfefa935 | 1272 | struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1) |
95fc7512 | 1273 | { |
53cce84c | 1274 | char refpath[PATH_MAX]; |
dfefa935 | 1275 | if (check_refname_format(refname, 0)) |
4bd18c43 | 1276 | return NULL; |
dfefa935 | 1277 | strcpy(refpath, mkpath("refs/%s", refname)); |
68db31cc | 1278 | return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL); |
4bd18c43 SP |
1279 | } |
1280 | ||
dfefa935 MH |
1281 | struct ref_lock *lock_any_ref_for_update(const char *refname, |
1282 | const unsigned char *old_sha1, int flags) | |
4bd18c43 | 1283 | { |
dfefa935 | 1284 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) |
257f3020 | 1285 | return NULL; |
dfefa935 | 1286 | return lock_ref_sha1_basic(refname, old_sha1, flags, NULL); |
c0277d15 JH |
1287 | } |
1288 | ||
26a063a1 JH |
1289 | static struct lock_file packlock; |
1290 | ||
c0277d15 JH |
1291 | static int repack_without_ref(const char *refname) |
1292 | { | |
e9c4c111 | 1293 | struct ref_array *packed; |
e9c4c111 | 1294 | int fd, i; |
c0277d15 | 1295 | |
316b097a | 1296 | packed = get_packed_refs(get_ref_cache(NULL)); |
fe9c7b78 | 1297 | if (search_ref_array(packed, refname) == NULL) |
c0277d15 | 1298 | return 0; |
c0277d15 | 1299 | fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0); |
1b018fd9 MV |
1300 | if (fd < 0) { |
1301 | unable_to_lock_error(git_path("packed-refs"), errno); | |
c0277d15 | 1302 | return error("cannot delete '%s' from packed refs", refname); |
1b018fd9 | 1303 | } |
c0277d15 | 1304 | |
e9c4c111 | 1305 | for (i = 0; i < packed->nr; i++) { |
c0277d15 JH |
1306 | char line[PATH_MAX + 100]; |
1307 | int len; | |
fe9c7b78 | 1308 | struct ref_entry *ref = packed->refs[i]; |
e9c4c111 JP |
1309 | |
1310 | if (!strcmp(refname, ref->name)) | |
c0277d15 JH |
1311 | continue; |
1312 | len = snprintf(line, sizeof(line), "%s %s\n", | |
e9c4c111 | 1313 | sha1_to_hex(ref->sha1), ref->name); |
c0277d15 JH |
1314 | /* this should not happen but just being defensive */ |
1315 | if (len > sizeof(line)) | |
e9c4c111 | 1316 | die("too long a refname '%s'", ref->name); |
c0277d15 JH |
1317 | write_or_die(fd, line, len); |
1318 | } | |
1319 | return commit_lock_file(&packlock); | |
1320 | } | |
1321 | ||
eca35a25 | 1322 | int delete_ref(const char *refname, const unsigned char *sha1, int delopt) |
c0277d15 JH |
1323 | { |
1324 | struct ref_lock *lock; | |
eca35a25 | 1325 | int err, i = 0, ret = 0, flag = 0; |
c0277d15 | 1326 | |
68db31cc | 1327 | lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); |
c0277d15 JH |
1328 | if (!lock) |
1329 | return 1; | |
045a476f | 1330 | if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { |
c0277d15 | 1331 | /* loose */ |
eca35a25 MV |
1332 | const char *path; |
1333 | ||
1334 | if (!(delopt & REF_NODEREF)) { | |
1335 | i = strlen(lock->lk->filename) - 5; /* .lock */ | |
1336 | lock->lk->filename[i] = 0; | |
1337 | path = lock->lk->filename; | |
1338 | } else { | |
9db56f71 | 1339 | path = git_path("%s", refname); |
eca35a25 | 1340 | } |
691f1a28 AR |
1341 | err = unlink_or_warn(path); |
1342 | if (err && errno != ENOENT) | |
c0277d15 | 1343 | ret = 1; |
691f1a28 | 1344 | |
eca35a25 MV |
1345 | if (!(delopt & REF_NODEREF)) |
1346 | lock->lk->filename[i] = '.'; | |
c0277d15 JH |
1347 | } |
1348 | /* removing the loose one could have resurrected an earlier | |
1349 | * packed one. Also, if it was not loose we need to repack | |
1350 | * without it. | |
1351 | */ | |
1352 | ret |= repack_without_ref(refname); | |
1353 | ||
691f1a28 | 1354 | unlink_or_warn(git_path("logs/%s", lock->ref_name)); |
3870a0d1 | 1355 | invalidate_ref_cache(NULL); |
c0277d15 JH |
1356 | unlock_ref(lock); |
1357 | return ret; | |
4bd18c43 SP |
1358 | } |
1359 | ||
765c2258 PH |
1360 | /* |
1361 | * People using contrib's git-new-workdir have .git/logs/refs -> | |
1362 | * /some/other/path/.git/logs/refs, and that may live on another device. | |
1363 | * | |
1364 | * IOW, to avoid cross device rename errors, the temporary renamed log must | |
1365 | * live into logs/refs. | |
1366 | */ | |
1367 | #define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log" | |
1368 | ||
dfefa935 | 1369 | int rename_ref(const char *oldrefname, const char *newrefname, const char *logmsg) |
c976d415 | 1370 | { |
c976d415 LH |
1371 | unsigned char sha1[20], orig_sha1[20]; |
1372 | int flag = 0, logmoved = 0; | |
1373 | struct ref_lock *lock; | |
c976d415 | 1374 | struct stat loginfo; |
dfefa935 | 1375 | int log = !lstat(git_path("logs/%s", oldrefname), &loginfo); |
eca35a25 | 1376 | const char *symref = NULL; |
316b097a | 1377 | struct ref_cache *refs = get_ref_cache(NULL); |
c976d415 | 1378 | |
450d4c0f | 1379 | if (log && S_ISLNK(loginfo.st_mode)) |
dfefa935 | 1380 | return error("reflog for %s is a symlink", oldrefname); |
c976d415 | 1381 | |
8d68493f | 1382 | symref = resolve_ref_unsafe(oldrefname, orig_sha1, 1, &flag); |
eca35a25 | 1383 | if (flag & REF_ISSYMREF) |
fa58186c | 1384 | return error("refname %s is a symbolic ref, renaming it is not supported", |
dfefa935 | 1385 | oldrefname); |
eca35a25 | 1386 | if (!symref) |
dfefa935 | 1387 | return error("refname %s not found", oldrefname); |
c976d415 | 1388 | |
316b097a | 1389 | if (!is_refname_available(newrefname, oldrefname, get_packed_refs(refs))) |
c976d415 LH |
1390 | return 1; |
1391 | ||
316b097a | 1392 | if (!is_refname_available(newrefname, oldrefname, get_loose_refs(refs))) |
c976d415 LH |
1393 | return 1; |
1394 | ||
dfefa935 | 1395 | if (log && rename(git_path("logs/%s", oldrefname), git_path(TMP_RENAMED_LOG))) |
765c2258 | 1396 | return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s", |
dfefa935 | 1397 | oldrefname, strerror(errno)); |
c976d415 | 1398 | |
dfefa935 MH |
1399 | if (delete_ref(oldrefname, orig_sha1, REF_NODEREF)) { |
1400 | error("unable to delete old %s", oldrefname); | |
c976d415 LH |
1401 | goto rollback; |
1402 | } | |
1403 | ||
dfefa935 MH |
1404 | if (!read_ref_full(newrefname, sha1, 1, &flag) && |
1405 | delete_ref(newrefname, sha1, REF_NODEREF)) { | |
c976d415 | 1406 | if (errno==EISDIR) { |
dfefa935 MH |
1407 | if (remove_empty_directories(git_path("%s", newrefname))) { |
1408 | error("Directory not empty: %s", newrefname); | |
c976d415 LH |
1409 | goto rollback; |
1410 | } | |
1411 | } else { | |
dfefa935 | 1412 | error("unable to delete existing %s", newrefname); |
c976d415 LH |
1413 | goto rollback; |
1414 | } | |
1415 | } | |
1416 | ||
dfefa935 MH |
1417 | if (log && safe_create_leading_directories(git_path("logs/%s", newrefname))) { |
1418 | error("unable to create directory for %s", newrefname); | |
c976d415 LH |
1419 | goto rollback; |
1420 | } | |
1421 | ||
1422 | retry: | |
dfefa935 | 1423 | if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newrefname))) { |
d9e74d57 JR |
1424 | if (errno==EISDIR || errno==ENOTDIR) { |
1425 | /* | |
1426 | * rename(a, b) when b is an existing | |
1427 | * directory ought to result in ISDIR, but | |
1428 | * Solaris 5.8 gives ENOTDIR. Sheesh. | |
1429 | */ | |
dfefa935 MH |
1430 | if (remove_empty_directories(git_path("logs/%s", newrefname))) { |
1431 | error("Directory not empty: logs/%s", newrefname); | |
c976d415 LH |
1432 | goto rollback; |
1433 | } | |
1434 | goto retry; | |
1435 | } else { | |
765c2258 | 1436 | error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s", |
dfefa935 | 1437 | newrefname, strerror(errno)); |
c976d415 LH |
1438 | goto rollback; |
1439 | } | |
1440 | } | |
1441 | logmoved = log; | |
1442 | ||
dfefa935 | 1443 | lock = lock_ref_sha1_basic(newrefname, NULL, 0, NULL); |
c976d415 | 1444 | if (!lock) { |
dfefa935 | 1445 | error("unable to lock %s for update", newrefname); |
c976d415 LH |
1446 | goto rollback; |
1447 | } | |
c976d415 LH |
1448 | lock->force_write = 1; |
1449 | hashcpy(lock->old_sha1, orig_sha1); | |
678d0f4c | 1450 | if (write_ref_sha1(lock, orig_sha1, logmsg)) { |
dfefa935 | 1451 | error("unable to write current sha1 into %s", newrefname); |
c976d415 LH |
1452 | goto rollback; |
1453 | } | |
1454 | ||
1455 | return 0; | |
1456 | ||
1457 | rollback: | |
dfefa935 | 1458 | lock = lock_ref_sha1_basic(oldrefname, NULL, 0, NULL); |
c976d415 | 1459 | if (!lock) { |
dfefa935 | 1460 | error("unable to lock %s for rollback", oldrefname); |
c976d415 LH |
1461 | goto rollbacklog; |
1462 | } | |
1463 | ||
1464 | lock->force_write = 1; | |
1465 | flag = log_all_ref_updates; | |
1466 | log_all_ref_updates = 0; | |
1467 | if (write_ref_sha1(lock, orig_sha1, NULL)) | |
dfefa935 | 1468 | error("unable to write current sha1 into %s", oldrefname); |
c976d415 LH |
1469 | log_all_ref_updates = flag; |
1470 | ||
1471 | rollbacklog: | |
dfefa935 | 1472 | if (logmoved && rename(git_path("logs/%s", newrefname), git_path("logs/%s", oldrefname))) |
c976d415 | 1473 | error("unable to restore logfile %s from %s: %s", |
dfefa935 | 1474 | oldrefname, newrefname, strerror(errno)); |
c976d415 | 1475 | if (!logmoved && log && |
dfefa935 | 1476 | rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldrefname))) |
765c2258 | 1477 | error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s", |
dfefa935 | 1478 | oldrefname, strerror(errno)); |
c976d415 LH |
1479 | |
1480 | return 1; | |
1481 | } | |
1482 | ||
435fc852 | 1483 | int close_ref(struct ref_lock *lock) |
b531394d BC |
1484 | { |
1485 | if (close_lock_file(lock->lk)) | |
1486 | return -1; | |
1487 | lock->lock_fd = -1; | |
1488 | return 0; | |
1489 | } | |
1490 | ||
435fc852 | 1491 | int commit_ref(struct ref_lock *lock) |
b531394d BC |
1492 | { |
1493 | if (commit_lock_file(lock->lk)) | |
1494 | return -1; | |
1495 | lock->lock_fd = -1; | |
1496 | return 0; | |
1497 | } | |
1498 | ||
e5f38ec3 | 1499 | void unlock_ref(struct ref_lock *lock) |
4bd18c43 | 1500 | { |
4ed7cd3a BC |
1501 | /* Do not free lock->lk -- atexit() still looks at them */ |
1502 | if (lock->lk) | |
1503 | rollback_lock_file(lock->lk); | |
434cd0cd | 1504 | free(lock->ref_name); |
1655707c | 1505 | free(lock->orig_ref_name); |
4bd18c43 SP |
1506 | free(lock); |
1507 | } | |
1508 | ||
0ec29a47 JH |
1509 | /* |
1510 | * copy the reflog message msg to buf, which has been allocated sufficiently | |
1511 | * large, while cleaning up the whitespaces. Especially, convert LF to space, | |
1512 | * because reflog file is one line per entry. | |
1513 | */ | |
1514 | static int copy_msg(char *buf, const char *msg) | |
1515 | { | |
1516 | char *cp = buf; | |
1517 | char c; | |
1518 | int wasspace = 1; | |
1519 | ||
1520 | *cp++ = '\t'; | |
1521 | while ((c = *msg++)) { | |
1522 | if (wasspace && isspace(c)) | |
1523 | continue; | |
1524 | wasspace = isspace(c); | |
1525 | if (wasspace) | |
1526 | c = ' '; | |
1527 | *cp++ = c; | |
1528 | } | |
1529 | while (buf < cp && isspace(cp[-1])) | |
1530 | cp--; | |
1531 | *cp++ = '\n'; | |
1532 | return cp - buf; | |
1533 | } | |
1534 | ||
dfefa935 | 1535 | int log_ref_setup(const char *refname, char *logfile, int bufsize) |
6de08ae6 | 1536 | { |
859c3017 | 1537 | int logfd, oflags = O_APPEND | O_WRONLY; |
9a13f0b7 | 1538 | |
dfefa935 | 1539 | git_snpath(logfile, bufsize, "logs/%s", refname); |
4057deb5 | 1540 | if (log_all_ref_updates && |
dfefa935 MH |
1541 | (!prefixcmp(refname, "refs/heads/") || |
1542 | !prefixcmp(refname, "refs/remotes/") || | |
1543 | !prefixcmp(refname, "refs/notes/") || | |
1544 | !strcmp(refname, "HEAD"))) { | |
157aaea5 | 1545 | if (safe_create_leading_directories(logfile) < 0) |
6de08ae6 | 1546 | return error("unable to create directory for %s", |
157aaea5 | 1547 | logfile); |
6de08ae6 SP |
1548 | oflags |= O_CREAT; |
1549 | } | |
1550 | ||
157aaea5 | 1551 | logfd = open(logfile, oflags, 0666); |
6de08ae6 | 1552 | if (logfd < 0) { |
1974bf62 | 1553 | if (!(oflags & O_CREAT) && errno == ENOENT) |
6de08ae6 | 1554 | return 0; |
3b463c3f JH |
1555 | |
1556 | if ((oflags & O_CREAT) && errno == EISDIR) { | |
157aaea5 | 1557 | if (remove_empty_directories(logfile)) { |
3b463c3f | 1558 | return error("There are still logs under '%s'", |
157aaea5 | 1559 | logfile); |
3b463c3f | 1560 | } |
157aaea5 | 1561 | logfd = open(logfile, oflags, 0666); |
3b463c3f JH |
1562 | } |
1563 | ||
1564 | if (logfd < 0) | |
1565 | return error("Unable to append to %s: %s", | |
157aaea5 | 1566 | logfile, strerror(errno)); |
6de08ae6 SP |
1567 | } |
1568 | ||
157aaea5 | 1569 | adjust_shared_perm(logfile); |
859c3017 EM |
1570 | close(logfd); |
1571 | return 0; | |
1572 | } | |
443b92b6 | 1573 | |
dfefa935 | 1574 | static int log_ref_write(const char *refname, const unsigned char *old_sha1, |
859c3017 EM |
1575 | const unsigned char *new_sha1, const char *msg) |
1576 | { | |
1577 | int logfd, result, written, oflags = O_APPEND | O_WRONLY; | |
1578 | unsigned maxlen, len; | |
1579 | int msglen; | |
157aaea5 | 1580 | char log_file[PATH_MAX]; |
859c3017 EM |
1581 | char *logrec; |
1582 | const char *committer; | |
1583 | ||
1584 | if (log_all_ref_updates < 0) | |
1585 | log_all_ref_updates = !is_bare_repository(); | |
1586 | ||
dfefa935 | 1587 | result = log_ref_setup(refname, log_file, sizeof(log_file)); |
859c3017 EM |
1588 | if (result) |
1589 | return result; | |
1590 | ||
1591 | logfd = open(log_file, oflags); | |
1592 | if (logfd < 0) | |
1593 | return 0; | |
0ec29a47 | 1594 | msglen = msg ? strlen(msg) : 0; |
774751a8 | 1595 | committer = git_committer_info(0); |
8ac65937 JH |
1596 | maxlen = strlen(committer) + msglen + 100; |
1597 | logrec = xmalloc(maxlen); | |
1598 | len = sprintf(logrec, "%s %s %s\n", | |
9a13f0b7 NP |
1599 | sha1_to_hex(old_sha1), |
1600 | sha1_to_hex(new_sha1), | |
8ac65937 JH |
1601 | committer); |
1602 | if (msglen) | |
0ec29a47 | 1603 | len += copy_msg(logrec + len - 1, msg) - 1; |
93822c22 | 1604 | written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1; |
6de08ae6 | 1605 | free(logrec); |
91c8d590 | 1606 | if (close(logfd) != 0 || written != len) |
9a13f0b7 | 1607 | return error("Unable to append to %s", log_file); |
6de08ae6 SP |
1608 | return 0; |
1609 | } | |
1610 | ||
c3b0dec5 LT |
1611 | static int is_branch(const char *refname) |
1612 | { | |
1613 | return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"); | |
1614 | } | |
1615 | ||
4bd18c43 SP |
1616 | int write_ref_sha1(struct ref_lock *lock, |
1617 | const unsigned char *sha1, const char *logmsg) | |
1618 | { | |
1619 | static char term = '\n'; | |
c3b0dec5 | 1620 | struct object *o; |
4bd18c43 SP |
1621 | |
1622 | if (!lock) | |
95fc7512 | 1623 | return -1; |
a89fccd2 | 1624 | if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) { |
4bd18c43 SP |
1625 | unlock_ref(lock); |
1626 | return 0; | |
95fc7512 | 1627 | } |
c3b0dec5 LT |
1628 | o = parse_object(sha1); |
1629 | if (!o) { | |
7be8b3ba | 1630 | error("Trying to write ref %s with nonexistent object %s", |
c3b0dec5 LT |
1631 | lock->ref_name, sha1_to_hex(sha1)); |
1632 | unlock_ref(lock); | |
1633 | return -1; | |
1634 | } | |
1635 | if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) { | |
1636 | error("Trying to write non-commit object %s to branch %s", | |
1637 | sha1_to_hex(sha1), lock->ref_name); | |
1638 | unlock_ref(lock); | |
1639 | return -1; | |
1640 | } | |
93822c22 AW |
1641 | if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 || |
1642 | write_in_full(lock->lock_fd, &term, 1) != 1 | |
b531394d | 1643 | || close_ref(lock) < 0) { |
c33d5174 | 1644 | error("Couldn't write %s", lock->lk->filename); |
4bd18c43 SP |
1645 | unlock_ref(lock); |
1646 | return -1; | |
1647 | } | |
8bf90dc9 | 1648 | clear_loose_ref_cache(get_ref_cache(NULL)); |
bd104db1 NP |
1649 | if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 || |
1650 | (strcmp(lock->ref_name, lock->orig_ref_name) && | |
1651 | log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) { | |
6de08ae6 SP |
1652 | unlock_ref(lock); |
1653 | return -1; | |
1654 | } | |
605fac8b NP |
1655 | if (strcmp(lock->orig_ref_name, "HEAD") != 0) { |
1656 | /* | |
1657 | * Special hack: If a branch is updated directly and HEAD | |
1658 | * points to it (may happen on the remote side of a push | |
1659 | * for example) then logically the HEAD reflog should be | |
1660 | * updated too. | |
1661 | * A generic solution implies reverse symref information, | |
1662 | * but finding all symrefs pointing to the given branch | |
1663 | * would be rather costly for this rare event (the direct | |
1664 | * update of a branch) to be worth it. So let's cheat and | |
1665 | * check with HEAD only which should cover 99% of all usage | |
1666 | * scenarios (even 100% of the default ones). | |
1667 | */ | |
1668 | unsigned char head_sha1[20]; | |
1669 | int head_flag; | |
1670 | const char *head_ref; | |
8cad4744 | 1671 | head_ref = resolve_ref_unsafe("HEAD", head_sha1, 1, &head_flag); |
605fac8b NP |
1672 | if (head_ref && (head_flag & REF_ISSYMREF) && |
1673 | !strcmp(head_ref, lock->ref_name)) | |
1674 | log_ref_write("HEAD", lock->old_sha1, sha1, logmsg); | |
1675 | } | |
b531394d | 1676 | if (commit_ref(lock)) { |
434cd0cd | 1677 | error("Couldn't set %s", lock->ref_name); |
4bd18c43 SP |
1678 | unlock_ref(lock); |
1679 | return -1; | |
1680 | } | |
4bd18c43 SP |
1681 | unlock_ref(lock); |
1682 | return 0; | |
95fc7512 | 1683 | } |
d556fae2 | 1684 | |
8b5157e4 NP |
1685 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1686 | const char *logmsg) | |
41b625b0 NP |
1687 | { |
1688 | const char *lockpath; | |
1689 | char ref[1000]; | |
1690 | int fd, len, written; | |
a4f34cbb | 1691 | char *git_HEAD = git_pathdup("%s", ref_target); |
8b5157e4 NP |
1692 | unsigned char old_sha1[20], new_sha1[20]; |
1693 | ||
1694 | if (logmsg && read_ref(ref_target, old_sha1)) | |
1695 | hashclr(old_sha1); | |
41b625b0 | 1696 | |
d48744d1 JH |
1697 | if (safe_create_leading_directories(git_HEAD) < 0) |
1698 | return error("unable to create directory for %s", git_HEAD); | |
1699 | ||
41b625b0 NP |
1700 | #ifndef NO_SYMLINK_HEAD |
1701 | if (prefer_symlink_refs) { | |
1702 | unlink(git_HEAD); | |
1703 | if (!symlink(refs_heads_master, git_HEAD)) | |
8b5157e4 | 1704 | goto done; |
41b625b0 NP |
1705 | fprintf(stderr, "no symlink - falling back to symbolic ref\n"); |
1706 | } | |
1707 | #endif | |
1708 | ||
1709 | len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master); | |
1710 | if (sizeof(ref) <= len) { | |
1711 | error("refname too long: %s", refs_heads_master); | |
47fc52e2 | 1712 | goto error_free_return; |
41b625b0 NP |
1713 | } |
1714 | lockpath = mkpath("%s.lock", git_HEAD); | |
1715 | fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1716 | if (fd < 0) { | |
1717 | error("Unable to open %s for writing", lockpath); | |
47fc52e2 | 1718 | goto error_free_return; |
41b625b0 NP |
1719 | } |
1720 | written = write_in_full(fd, ref, len); | |
91c8d590 | 1721 | if (close(fd) != 0 || written != len) { |
41b625b0 | 1722 | error("Unable to write to %s", lockpath); |
47fc52e2 | 1723 | goto error_unlink_return; |
41b625b0 NP |
1724 | } |
1725 | if (rename(lockpath, git_HEAD) < 0) { | |
41b625b0 | 1726 | error("Unable to create %s", git_HEAD); |
47fc52e2 | 1727 | goto error_unlink_return; |
41b625b0 NP |
1728 | } |
1729 | if (adjust_shared_perm(git_HEAD)) { | |
41b625b0 | 1730 | error("Unable to fix permissions on %s", lockpath); |
47fc52e2 | 1731 | error_unlink_return: |
691f1a28 | 1732 | unlink_or_warn(lockpath); |
47fc52e2 JH |
1733 | error_free_return: |
1734 | free(git_HEAD); | |
1735 | return -1; | |
41b625b0 | 1736 | } |
8b5157e4 | 1737 | |
ee96d11b | 1738 | #ifndef NO_SYMLINK_HEAD |
8b5157e4 | 1739 | done: |
ee96d11b | 1740 | #endif |
8b5157e4 NP |
1741 | if (logmsg && !read_ref(refs_heads_master, new_sha1)) |
1742 | log_ref_write(ref_target, old_sha1, new_sha1, logmsg); | |
1743 | ||
47fc52e2 | 1744 | free(git_HEAD); |
41b625b0 NP |
1745 | return 0; |
1746 | } | |
1747 | ||
16d7cc90 JH |
1748 | static char *ref_msg(const char *line, const char *endp) |
1749 | { | |
1750 | const char *ep; | |
16d7cc90 | 1751 | line += 82; |
182af834 PH |
1752 | ep = memchr(line, '\n', endp - line); |
1753 | if (!ep) | |
1754 | ep = endp; | |
1755 | return xmemdupz(line, ep - line); | |
16d7cc90 JH |
1756 | } |
1757 | ||
dfefa935 MH |
1758 | int read_ref_at(const char *refname, unsigned long at_time, int cnt, |
1759 | unsigned char *sha1, char **msg, | |
1760 | unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
d556fae2 | 1761 | { |
e5229042 | 1762 | const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec; |
d556fae2 | 1763 | char *tz_c; |
e29cb53a | 1764 | int logfd, tz, reccnt = 0; |
d556fae2 SP |
1765 | struct stat st; |
1766 | unsigned long date; | |
e5229042 | 1767 | unsigned char logged_sha1[20]; |
cb48cb58 | 1768 | void *log_mapped; |
dc49cd76 | 1769 | size_t mapsz; |
d556fae2 | 1770 | |
dfefa935 | 1771 | logfile = git_path("logs/%s", refname); |
d556fae2 SP |
1772 | logfd = open(logfile, O_RDONLY, 0); |
1773 | if (logfd < 0) | |
d824cbba | 1774 | die_errno("Unable to read log '%s'", logfile); |
d556fae2 SP |
1775 | fstat(logfd, &st); |
1776 | if (!st.st_size) | |
1777 | die("Log %s is empty.", logfile); | |
dc49cd76 SP |
1778 | mapsz = xsize_t(st.st_size); |
1779 | log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0); | |
cb48cb58 | 1780 | logdata = log_mapped; |
d556fae2 SP |
1781 | close(logfd); |
1782 | ||
e5229042 | 1783 | lastrec = NULL; |
d556fae2 SP |
1784 | rec = logend = logdata + st.st_size; |
1785 | while (logdata < rec) { | |
e29cb53a | 1786 | reccnt++; |
d556fae2 SP |
1787 | if (logdata < rec && *(rec-1) == '\n') |
1788 | rec--; | |
e5229042 SP |
1789 | lastgt = NULL; |
1790 | while (logdata < rec && *(rec-1) != '\n') { | |
d556fae2 | 1791 | rec--; |
e5229042 SP |
1792 | if (*rec == '>') |
1793 | lastgt = rec; | |
1794 | } | |
1795 | if (!lastgt) | |
d556fae2 | 1796 | die("Log %s is corrupt.", logfile); |
e5229042 | 1797 | date = strtoul(lastgt + 1, &tz_c, 10); |
ab2a1a32 | 1798 | if (date <= at_time || cnt == 0) { |
76a44c5c | 1799 | tz = strtoul(tz_c, NULL, 10); |
16d7cc90 JH |
1800 | if (msg) |
1801 | *msg = ref_msg(rec, logend); | |
1802 | if (cutoff_time) | |
1803 | *cutoff_time = date; | |
1804 | if (cutoff_tz) | |
1805 | *cutoff_tz = tz; | |
1806 | if (cutoff_cnt) | |
76a44c5c | 1807 | *cutoff_cnt = reccnt - 1; |
e5229042 SP |
1808 | if (lastrec) { |
1809 | if (get_sha1_hex(lastrec, logged_sha1)) | |
1810 | die("Log %s is corrupt.", logfile); | |
1811 | if (get_sha1_hex(rec + 41, sha1)) | |
1812 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1813 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1814 | warning("Log %s has gap after %s.", |
73013afd | 1815 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 | 1816 | } |
e5f38ec3 JH |
1817 | } |
1818 | else if (date == at_time) { | |
e5229042 SP |
1819 | if (get_sha1_hex(rec + 41, sha1)) |
1820 | die("Log %s is corrupt.", logfile); | |
e5f38ec3 JH |
1821 | } |
1822 | else { | |
e5229042 SP |
1823 | if (get_sha1_hex(rec + 41, logged_sha1)) |
1824 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1825 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1826 | warning("Log %s unexpectedly ended on %s.", |
73013afd | 1827 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 SP |
1828 | } |
1829 | } | |
dc49cd76 | 1830 | munmap(log_mapped, mapsz); |
d556fae2 SP |
1831 | return 0; |
1832 | } | |
e5229042 | 1833 | lastrec = rec; |
ab2a1a32 JH |
1834 | if (cnt > 0) |
1835 | cnt--; | |
d556fae2 SP |
1836 | } |
1837 | ||
e5229042 SP |
1838 | rec = logdata; |
1839 | while (rec < logend && *rec != '>' && *rec != '\n') | |
1840 | rec++; | |
1841 | if (rec == logend || *rec == '\n') | |
d556fae2 | 1842 | die("Log %s is corrupt.", logfile); |
e5229042 | 1843 | date = strtoul(rec + 1, &tz_c, 10); |
d556fae2 SP |
1844 | tz = strtoul(tz_c, NULL, 10); |
1845 | if (get_sha1_hex(logdata, sha1)) | |
1846 | die("Log %s is corrupt.", logfile); | |
d1a4489a JK |
1847 | if (is_null_sha1(sha1)) { |
1848 | if (get_sha1_hex(logdata + 41, sha1)) | |
1849 | die("Log %s is corrupt.", logfile); | |
1850 | } | |
16d7cc90 JH |
1851 | if (msg) |
1852 | *msg = ref_msg(logdata, logend); | |
dc49cd76 | 1853 | munmap(log_mapped, mapsz); |
16d7cc90 JH |
1854 | |
1855 | if (cutoff_time) | |
1856 | *cutoff_time = date; | |
1857 | if (cutoff_tz) | |
1858 | *cutoff_tz = tz; | |
1859 | if (cutoff_cnt) | |
1860 | *cutoff_cnt = reccnt; | |
1861 | return 1; | |
d556fae2 | 1862 | } |
2ff81662 | 1863 | |
dfefa935 | 1864 | int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long ofs, void *cb_data) |
2ff81662 JH |
1865 | { |
1866 | const char *logfile; | |
1867 | FILE *logfp; | |
8ca78803 | 1868 | struct strbuf sb = STRBUF_INIT; |
2266bf27 | 1869 | int ret = 0; |
2ff81662 | 1870 | |
dfefa935 | 1871 | logfile = git_path("logs/%s", refname); |
2ff81662 JH |
1872 | logfp = fopen(logfile, "r"); |
1873 | if (!logfp) | |
883d60fa | 1874 | return -1; |
101d15e0 JH |
1875 | |
1876 | if (ofs) { | |
1877 | struct stat statbuf; | |
1878 | if (fstat(fileno(logfp), &statbuf) || | |
1879 | statbuf.st_size < ofs || | |
1880 | fseek(logfp, -ofs, SEEK_END) || | |
8ca78803 | 1881 | strbuf_getwholeline(&sb, logfp, '\n')) { |
9d33f7c2 | 1882 | fclose(logfp); |
8ca78803 | 1883 | strbuf_release(&sb); |
101d15e0 | 1884 | return -1; |
9d33f7c2 | 1885 | } |
101d15e0 JH |
1886 | } |
1887 | ||
8ca78803 | 1888 | while (!strbuf_getwholeline(&sb, logfp, '\n')) { |
2ff81662 | 1889 | unsigned char osha1[20], nsha1[20]; |
883d60fa JS |
1890 | char *email_end, *message; |
1891 | unsigned long timestamp; | |
8ca78803 | 1892 | int tz; |
2ff81662 JH |
1893 | |
1894 | /* old SP new SP name <email> SP time TAB msg LF */ | |
8ca78803 RS |
1895 | if (sb.len < 83 || sb.buf[sb.len - 1] != '\n' || |
1896 | get_sha1_hex(sb.buf, osha1) || sb.buf[40] != ' ' || | |
1897 | get_sha1_hex(sb.buf + 41, nsha1) || sb.buf[81] != ' ' || | |
1898 | !(email_end = strchr(sb.buf + 82, '>')) || | |
883d60fa JS |
1899 | email_end[1] != ' ' || |
1900 | !(timestamp = strtoul(email_end + 2, &message, 10)) || | |
1901 | !message || message[0] != ' ' || | |
1902 | (message[1] != '+' && message[1] != '-') || | |
1903 | !isdigit(message[2]) || !isdigit(message[3]) || | |
b4dd4856 | 1904 | !isdigit(message[4]) || !isdigit(message[5])) |
2ff81662 | 1905 | continue; /* corrupt? */ |
883d60fa JS |
1906 | email_end[1] = '\0'; |
1907 | tz = strtol(message + 1, NULL, 10); | |
b4dd4856 JS |
1908 | if (message[6] != '\t') |
1909 | message += 6; | |
1910 | else | |
1911 | message += 7; | |
8ca78803 RS |
1912 | ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message, |
1913 | cb_data); | |
883d60fa | 1914 | if (ret) |
2266bf27 | 1915 | break; |
2ff81662 JH |
1916 | } |
1917 | fclose(logfp); | |
8ca78803 | 1918 | strbuf_release(&sb); |
2266bf27 | 1919 | return ret; |
2ff81662 | 1920 | } |
e29cb53a | 1921 | |
dfefa935 | 1922 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data) |
101d15e0 | 1923 | { |
dfefa935 | 1924 | return for_each_recent_reflog_ent(refname, fn, 0, cb_data); |
101d15e0 JH |
1925 | } |
1926 | ||
eb8381c8 NP |
1927 | static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data) |
1928 | { | |
1929 | DIR *dir = opendir(git_path("logs/%s", base)); | |
fcee5a14 | 1930 | int retval = 0; |
eb8381c8 NP |
1931 | |
1932 | if (dir) { | |
1933 | struct dirent *de; | |
1934 | int baselen = strlen(base); | |
1935 | char *log = xmalloc(baselen + 257); | |
1936 | ||
1937 | memcpy(log, base, baselen); | |
1938 | if (baselen && base[baselen-1] != '/') | |
1939 | log[baselen++] = '/'; | |
1940 | ||
1941 | while ((de = readdir(dir)) != NULL) { | |
1942 | struct stat st; | |
1943 | int namelen; | |
1944 | ||
1945 | if (de->d_name[0] == '.') | |
1946 | continue; | |
1947 | namelen = strlen(de->d_name); | |
1948 | if (namelen > 255) | |
1949 | continue; | |
1950 | if (has_extension(de->d_name, ".lock")) | |
1951 | continue; | |
1952 | memcpy(log + baselen, de->d_name, namelen+1); | |
1953 | if (stat(git_path("logs/%s", log), &st) < 0) | |
1954 | continue; | |
1955 | if (S_ISDIR(st.st_mode)) { | |
1956 | retval = do_for_each_reflog(log, fn, cb_data); | |
1957 | } else { | |
1958 | unsigned char sha1[20]; | |
c6893323 | 1959 | if (read_ref_full(log, sha1, 0, NULL)) |
eb8381c8 NP |
1960 | retval = error("bad ref for %s", log); |
1961 | else | |
1962 | retval = fn(log, sha1, 0, cb_data); | |
1963 | } | |
1964 | if (retval) | |
1965 | break; | |
1966 | } | |
1967 | free(log); | |
1968 | closedir(dir); | |
1969 | } | |
acb39f64 | 1970 | else if (*base) |
fcee5a14 | 1971 | return errno; |
eb8381c8 NP |
1972 | return retval; |
1973 | } | |
1974 | ||
1975 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
1976 | { | |
1977 | return do_for_each_reflog("", fn, cb_data); | |
1978 | } | |
3d9f037c CR |
1979 | |
1980 | int update_ref(const char *action, const char *refname, | |
1981 | const unsigned char *sha1, const unsigned char *oldval, | |
1982 | int flags, enum action_on_err onerr) | |
1983 | { | |
1984 | static struct ref_lock *lock; | |
1985 | lock = lock_any_ref_for_update(refname, oldval, flags); | |
1986 | if (!lock) { | |
1987 | const char *str = "Cannot lock the ref '%s'."; | |
1988 | switch (onerr) { | |
1989 | case MSG_ON_ERR: error(str, refname); break; | |
1990 | case DIE_ON_ERR: die(str, refname); break; | |
1991 | case QUIET_ON_ERR: break; | |
1992 | } | |
1993 | return 1; | |
1994 | } | |
1995 | if (write_ref_sha1(lock, sha1, action) < 0) { | |
1996 | const char *str = "Cannot update the ref '%s'."; | |
1997 | switch (onerr) { | |
1998 | case MSG_ON_ERR: error(str, refname); break; | |
1999 | case DIE_ON_ERR: die(str, refname); break; | |
2000 | case QUIET_ON_ERR: break; | |
2001 | } | |
2002 | return 1; | |
2003 | } | |
2004 | return 0; | |
2005 | } | |
cda69f48 | 2006 | |
2c5c66be | 2007 | int ref_exists(const char *refname) |
c17b2294 JH |
2008 | { |
2009 | unsigned char sha1[20]; | |
8cad4744 | 2010 | return !!resolve_ref_unsafe(refname, sha1, 1, NULL); |
c17b2294 JH |
2011 | } |
2012 | ||
5483f799 | 2013 | struct ref *find_ref_by_name(const struct ref *list, const char *name) |
cda69f48 JK |
2014 | { |
2015 | for ( ; list; list = list->next) | |
2016 | if (!strcmp(list->name, name)) | |
5483f799 | 2017 | return (struct ref *)list; |
cda69f48 JK |
2018 | return NULL; |
2019 | } | |
7c2b3029 JK |
2020 | |
2021 | /* | |
2022 | * generate a format suitable for scanf from a ref_rev_parse_rules | |
2023 | * rule, that is replace the "%.*s" spec with a "%s" spec | |
2024 | */ | |
2025 | static void gen_scanf_fmt(char *scanf_fmt, const char *rule) | |
2026 | { | |
2027 | char *spec; | |
2028 | ||
2029 | spec = strstr(rule, "%.*s"); | |
2030 | if (!spec || strstr(spec + 4, "%.*s")) | |
2031 | die("invalid rule in ref_rev_parse_rules: %s", rule); | |
2032 | ||
2033 | /* copy all until spec */ | |
2034 | strncpy(scanf_fmt, rule, spec - rule); | |
2035 | scanf_fmt[spec - rule] = '\0'; | |
2036 | /* copy new spec */ | |
2037 | strcat(scanf_fmt, "%s"); | |
2038 | /* copy remaining rule */ | |
2039 | strcat(scanf_fmt, spec + 4); | |
2040 | ||
2041 | return; | |
2042 | } | |
2043 | ||
dfefa935 | 2044 | char *shorten_unambiguous_ref(const char *refname, int strict) |
7c2b3029 JK |
2045 | { |
2046 | int i; | |
2047 | static char **scanf_fmts; | |
2048 | static int nr_rules; | |
2049 | char *short_name; | |
2050 | ||
2051 | /* pre generate scanf formats from ref_rev_parse_rules[] */ | |
2052 | if (!nr_rules) { | |
2053 | size_t total_len = 0; | |
2054 | ||
2055 | /* the rule list is NULL terminated, count them first */ | |
2056 | for (; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
2057 | /* no +1 because strlen("%s") < strlen("%.*s") */ | |
2058 | total_len += strlen(ref_rev_parse_rules[nr_rules]); | |
2059 | ||
2060 | scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); | |
2061 | ||
2062 | total_len = 0; | |
2063 | for (i = 0; i < nr_rules; i++) { | |
2064 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] | |
2065 | + total_len; | |
2066 | gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); | |
2067 | total_len += strlen(ref_rev_parse_rules[i]); | |
2068 | } | |
2069 | } | |
2070 | ||
2071 | /* bail out if there are no rules */ | |
2072 | if (!nr_rules) | |
dfefa935 | 2073 | return xstrdup(refname); |
7c2b3029 | 2074 | |
dfefa935 MH |
2075 | /* buffer for scanf result, at most refname must fit */ |
2076 | short_name = xstrdup(refname); | |
7c2b3029 JK |
2077 | |
2078 | /* skip first rule, it will always match */ | |
2079 | for (i = nr_rules - 1; i > 0 ; --i) { | |
2080 | int j; | |
6e7b3309 | 2081 | int rules_to_fail = i; |
7c2b3029 JK |
2082 | int short_name_len; |
2083 | ||
dfefa935 | 2084 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) |
7c2b3029 JK |
2085 | continue; |
2086 | ||
2087 | short_name_len = strlen(short_name); | |
2088 | ||
6e7b3309 BW |
2089 | /* |
2090 | * in strict mode, all (except the matched one) rules | |
2091 | * must fail to resolve to a valid non-ambiguous ref | |
2092 | */ | |
2093 | if (strict) | |
2094 | rules_to_fail = nr_rules; | |
2095 | ||
7c2b3029 JK |
2096 | /* |
2097 | * check if the short name resolves to a valid ref, | |
2098 | * but use only rules prior to the matched one | |
2099 | */ | |
6e7b3309 | 2100 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 | 2101 | const char *rule = ref_rev_parse_rules[j]; |
7c2b3029 JK |
2102 | char refname[PATH_MAX]; |
2103 | ||
6e7b3309 BW |
2104 | /* skip matched rule */ |
2105 | if (i == j) | |
2106 | continue; | |
2107 | ||
7c2b3029 JK |
2108 | /* |
2109 | * the short name is ambiguous, if it resolves | |
2110 | * (with this previous rule) to a valid ref | |
2111 | * read_ref() returns 0 on success | |
2112 | */ | |
2113 | mksnpath(refname, sizeof(refname), | |
2114 | rule, short_name_len, short_name); | |
c6893323 | 2115 | if (ref_exists(refname)) |
7c2b3029 JK |
2116 | break; |
2117 | } | |
2118 | ||
2119 | /* | |
2120 | * short name is non-ambiguous if all previous rules | |
2121 | * haven't resolved to a valid ref | |
2122 | */ | |
6e7b3309 | 2123 | if (j == rules_to_fail) |
7c2b3029 JK |
2124 | return short_name; |
2125 | } | |
2126 | ||
2127 | free(short_name); | |
dfefa935 | 2128 | return xstrdup(refname); |
7c2b3029 | 2129 | } |