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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 | |
bc5fd6d3 MH |
7 | /* |
8 | * Make sure "ref" is something reasonable to have under ".git/refs/"; | |
9 | * We do not like it if: | |
10 | * | |
11 | * - any path component of it begins with ".", or | |
12 | * - it has double dots "..", or | |
13 | * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or | |
14 | * - it ends with a "/". | |
15 | * - it ends with ".lock" | |
16 | * - it contains a "\" (backslash) | |
17 | */ | |
f4204ab9 | 18 | |
bc5fd6d3 MH |
19 | /* Return true iff ch is not allowed in reference names. */ |
20 | static inline int bad_ref_char(int ch) | |
21 | { | |
22 | if (((unsigned) ch) <= ' ' || ch == 0x7f || | |
23 | ch == '~' || ch == '^' || ch == ':' || ch == '\\') | |
24 | return 1; | |
25 | /* 2.13 Pattern Matching Notation */ | |
26 | if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */ | |
27 | return 1; | |
28 | return 0; | |
29 | } | |
30 | ||
31 | /* | |
32 | * Try to read one refname component from the front of refname. Return | |
33 | * the length of the component found, or -1 if the component is not | |
34 | * legal. | |
35 | */ | |
36 | static int check_refname_component(const char *refname, int flags) | |
37 | { | |
38 | const char *cp; | |
39 | char last = '\0'; | |
40 | ||
41 | for (cp = refname; ; cp++) { | |
42 | char ch = *cp; | |
43 | if (ch == '\0' || ch == '/') | |
44 | break; | |
45 | if (bad_ref_char(ch)) | |
46 | return -1; /* Illegal character in refname. */ | |
47 | if (last == '.' && ch == '.') | |
48 | return -1; /* Refname contains "..". */ | |
49 | if (last == '@' && ch == '{') | |
50 | return -1; /* Refname contains "@{". */ | |
51 | last = ch; | |
52 | } | |
53 | if (cp == refname) | |
dac529e4 | 54 | return 0; /* Component has zero length. */ |
bc5fd6d3 MH |
55 | if (refname[0] == '.') { |
56 | if (!(flags & REFNAME_DOT_COMPONENT)) | |
57 | return -1; /* Component starts with '.'. */ | |
58 | /* | |
59 | * Even if leading dots are allowed, don't allow "." | |
60 | * as a component (".." is prevented by a rule above). | |
61 | */ | |
62 | if (refname[1] == '\0') | |
63 | return -1; /* Component equals ".". */ | |
64 | } | |
65 | if (cp - refname >= 5 && !memcmp(cp - 5, ".lock", 5)) | |
66 | return -1; /* Refname ends with ".lock". */ | |
67 | return cp - refname; | |
68 | } | |
69 | ||
70 | int check_refname_format(const char *refname, int flags) | |
71 | { | |
72 | int component_len, component_count = 0; | |
73 | ||
74 | while (1) { | |
75 | /* We are at the start of a path component. */ | |
76 | component_len = check_refname_component(refname, flags); | |
dac529e4 | 77 | if (component_len <= 0) { |
bc5fd6d3 MH |
78 | if ((flags & REFNAME_REFSPEC_PATTERN) && |
79 | refname[0] == '*' && | |
80 | (refname[1] == '\0' || refname[1] == '/')) { | |
81 | /* Accept one wildcard as a full refname component. */ | |
82 | flags &= ~REFNAME_REFSPEC_PATTERN; | |
83 | component_len = 1; | |
84 | } else { | |
85 | return -1; | |
86 | } | |
87 | } | |
88 | component_count++; | |
89 | if (refname[component_len] == '\0') | |
90 | break; | |
91 | /* Skip to next component. */ | |
92 | refname += component_len + 1; | |
93 | } | |
94 | ||
95 | if (refname[component_len - 1] == '.') | |
96 | return -1; /* Refname ends with '.'. */ | |
97 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) | |
98 | return -1; /* Refname has only one component. */ | |
99 | return 0; | |
100 | } | |
101 | ||
102 | struct ref_entry; | |
e1e22e37 | 103 | |
593f1bb8 MH |
104 | struct ref_value { |
105 | unsigned char sha1[20]; | |
106 | unsigned char peeled[20]; | |
107 | }; | |
108 | ||
d3177275 | 109 | struct ref_dir { |
e9c4c111 | 110 | int nr, alloc; |
e6ed3ca6 MH |
111 | |
112 | /* | |
113 | * Entries with index 0 <= i < sorted are sorted by name. New | |
114 | * entries are appended to the list unsorted, and are sorted | |
115 | * only when required; thus we avoid the need to sort the list | |
116 | * after the addition of every reference. | |
117 | */ | |
118 | int sorted; | |
119 | ||
d3177275 | 120 | struct ref_entry **entries; |
e9c4c111 JP |
121 | }; |
122 | ||
bc5fd6d3 MH |
123 | /* ISSYMREF=0x01, ISPACKED=0x02 and ISBROKEN=0x04 are public interfaces */ |
124 | #define REF_KNOWS_PEELED 0x10 | |
cf0adba7 | 125 | |
bc5fd6d3 MH |
126 | struct ref_entry { |
127 | unsigned char flag; /* ISSYMREF? ISPACKED? */ | |
593f1bb8 MH |
128 | union { |
129 | struct ref_value value; | |
130 | } u; | |
bc5fd6d3 MH |
131 | /* The full name of the reference (e.g., "refs/heads/master"): */ |
132 | char name[FLEX_ARRAY]; | |
133 | }; | |
e1e22e37 | 134 | |
cddc4258 MH |
135 | static struct ref_entry *create_ref_entry(const char *refname, |
136 | const unsigned char *sha1, int flag, | |
137 | int check_name) | |
e1e22e37 LT |
138 | { |
139 | int len; | |
cddc4258 | 140 | struct ref_entry *ref; |
e1e22e37 | 141 | |
09116a1c | 142 | if (check_name && |
dfefa935 MH |
143 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL|REFNAME_DOT_COMPONENT)) |
144 | die("Reference has invalid format: '%s'", refname); | |
cddc4258 MH |
145 | len = strlen(refname) + 1; |
146 | ref = xmalloc(sizeof(struct ref_entry) + len); | |
593f1bb8 MH |
147 | hashcpy(ref->u.value.sha1, sha1); |
148 | hashclr(ref->u.value.peeled); | |
cddc4258 MH |
149 | memcpy(ref->name, refname, len); |
150 | ref->flag = flag; | |
151 | return ref; | |
152 | } | |
153 | ||
732134ed MH |
154 | static void free_ref_entry(struct ref_entry *entry) |
155 | { | |
156 | free(entry); | |
157 | } | |
158 | ||
d3177275 MH |
159 | /* Add a ref_entry to the end of the ref_dir (unsorted). */ |
160 | static void add_ref(struct ref_dir *refs, struct ref_entry *ref) | |
cddc4258 | 161 | { |
d3177275 MH |
162 | ALLOC_GROW(refs->entries, refs->nr + 1, refs->alloc); |
163 | refs->entries[refs->nr++] = ref; | |
c774aab9 JP |
164 | } |
165 | ||
d3177275 | 166 | static void clear_ref_dir(struct ref_dir *dir) |
bc5fd6d3 MH |
167 | { |
168 | int i; | |
d3177275 MH |
169 | for (i = 0; i < dir->nr; i++) |
170 | free_ref_entry(dir->entries[i]); | |
171 | free(dir->entries); | |
172 | dir->sorted = dir->nr = dir->alloc = 0; | |
173 | dir->entries = NULL; | |
bc5fd6d3 MH |
174 | } |
175 | ||
e9c4c111 | 176 | static int ref_entry_cmp(const void *a, const void *b) |
c774aab9 | 177 | { |
e9c4c111 JP |
178 | struct ref_entry *one = *(struct ref_entry **)a; |
179 | struct ref_entry *two = *(struct ref_entry **)b; | |
180 | return strcmp(one->name, two->name); | |
181 | } | |
c774aab9 | 182 | |
d3177275 | 183 | static void sort_ref_dir(struct ref_dir *dir); |
bc5fd6d3 | 184 | |
d3177275 | 185 | static struct ref_entry *search_ref_dir(struct ref_dir *dir, const char *refname) |
bc5fd6d3 MH |
186 | { |
187 | struct ref_entry *e, **r; | |
188 | int len; | |
189 | ||
190 | if (refname == NULL) | |
191 | return NULL; | |
192 | ||
d3177275 | 193 | if (!dir->nr) |
bc5fd6d3 | 194 | return NULL; |
d3177275 | 195 | sort_ref_dir(dir); |
bc5fd6d3 MH |
196 | len = strlen(refname) + 1; |
197 | e = xmalloc(sizeof(struct ref_entry) + len); | |
198 | memcpy(e->name, refname, len); | |
199 | ||
d3177275 | 200 | r = bsearch(&e, dir->entries, dir->nr, sizeof(*dir->entries), ref_entry_cmp); |
bc5fd6d3 MH |
201 | |
202 | free(e); | |
203 | ||
204 | if (r == NULL) | |
205 | return NULL; | |
206 | ||
207 | return *r; | |
208 | } | |
209 | ||
202a56a9 MH |
210 | /* |
211 | * Emit a warning and return true iff ref1 and ref2 have the same name | |
212 | * and the same sha1. Die if they have the same name but different | |
213 | * sha1s. | |
214 | */ | |
215 | static int is_dup_ref(const struct ref_entry *ref1, const struct ref_entry *ref2) | |
216 | { | |
217 | if (!strcmp(ref1->name, ref2->name)) { | |
218 | /* Duplicate name; make sure that the SHA1s match: */ | |
593f1bb8 | 219 | if (hashcmp(ref1->u.value.sha1, ref2->u.value.sha1)) |
202a56a9 MH |
220 | die("Duplicated ref, and SHA1s don't match: %s", |
221 | ref1->name); | |
222 | warning("Duplicated ref: %s", ref1->name); | |
223 | return 1; | |
224 | } else { | |
225 | return 0; | |
226 | } | |
227 | } | |
228 | ||
e6ed3ca6 | 229 | /* |
81a79d8e MH |
230 | * Sort the entries in dir (if they are not already sorted) |
231 | * and remove any duplicate entries. | |
e6ed3ca6 | 232 | */ |
d3177275 | 233 | static void sort_ref_dir(struct ref_dir *dir) |
e9c4c111 | 234 | { |
202a56a9 | 235 | int i, j; |
81a79d8e | 236 | struct ref_entry *last = NULL; |
c774aab9 | 237 | |
e6ed3ca6 MH |
238 | /* |
239 | * This check also prevents passing a zero-length array to qsort(), | |
240 | * which is a problem on some platforms. | |
241 | */ | |
d3177275 | 242 | if (dir->sorted == dir->nr) |
e9c4c111 | 243 | return; |
c774aab9 | 244 | |
d3177275 | 245 | qsort(dir->entries, dir->nr, sizeof(*dir->entries), ref_entry_cmp); |
c774aab9 | 246 | |
81a79d8e MH |
247 | /* Remove any duplicates: */ |
248 | for (i = 0, j = 0; j < dir->nr; j++) { | |
249 | struct ref_entry *entry = dir->entries[j]; | |
250 | if (last && is_dup_ref(last, entry)) | |
251 | free_ref_entry(entry); | |
252 | else | |
253 | last = dir->entries[i++] = entry; | |
e9c4c111 | 254 | } |
81a79d8e | 255 | dir->sorted = dir->nr = i; |
e9c4c111 | 256 | } |
c774aab9 | 257 | |
bc5fd6d3 | 258 | #define DO_FOR_EACH_INCLUDE_BROKEN 01 |
c774aab9 | 259 | |
bc5fd6d3 | 260 | static struct ref_entry *current_ref; |
c774aab9 | 261 | |
bc5fd6d3 MH |
262 | static int do_one_ref(const char *base, each_ref_fn fn, int trim, |
263 | int flags, void *cb_data, struct ref_entry *entry) | |
264 | { | |
429213e4 | 265 | int retval; |
bc5fd6d3 MH |
266 | if (prefixcmp(entry->name, base)) |
267 | return 0; | |
c774aab9 | 268 | |
bc5fd6d3 MH |
269 | if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { |
270 | if (entry->flag & REF_ISBROKEN) | |
271 | return 0; /* ignore broken refs e.g. dangling symref */ | |
593f1bb8 | 272 | if (!has_sha1_file(entry->u.value.sha1)) { |
bc5fd6d3 MH |
273 | error("%s does not point to a valid object!", entry->name); |
274 | return 0; | |
275 | } | |
276 | } | |
277 | current_ref = entry; | |
593f1bb8 | 278 | retval = fn(entry->name + trim, entry->u.value.sha1, entry->flag, cb_data); |
429213e4 MH |
279 | current_ref = NULL; |
280 | return retval; | |
bc5fd6d3 | 281 | } |
c774aab9 | 282 | |
c36b5bc2 | 283 | /* |
d3177275 MH |
284 | * Call fn for each reference in dir that has index in the range |
285 | * offset <= index < dir->nr. This function does not sort the dir; | |
286 | * sorting should be done by the caller. | |
c36b5bc2 | 287 | */ |
d3177275 MH |
288 | static int do_for_each_ref_in_dir(struct ref_dir *dir, int offset, |
289 | const char *base, | |
290 | each_ref_fn fn, int trim, int flags, void *cb_data) | |
c36b5bc2 MH |
291 | { |
292 | int i; | |
d3177275 MH |
293 | assert(dir->sorted == dir->nr); |
294 | for (i = offset; i < dir->nr; i++) { | |
295 | int retval = do_one_ref(base, fn, trim, flags, cb_data, dir->entries[i]); | |
c36b5bc2 MH |
296 | if (retval) |
297 | return retval; | |
298 | } | |
299 | return 0; | |
300 | } | |
301 | ||
b3fd060f | 302 | /* |
d3177275 MH |
303 | * Call fn for each reference in the union of dir1 and dir2, in order |
304 | * by refname. If an entry appears in both dir1 and dir2, then only | |
305 | * process the version that is in dir2. The input dirs must already | |
306 | * be sorted. | |
b3fd060f | 307 | */ |
d3177275 MH |
308 | static int do_for_each_ref_in_dirs(struct ref_dir *dir1, |
309 | struct ref_dir *dir2, | |
310 | const char *base, each_ref_fn fn, int trim, | |
311 | int flags, void *cb_data) | |
b3fd060f MH |
312 | { |
313 | int retval; | |
314 | int i1 = 0, i2 = 0; | |
315 | ||
d3177275 MH |
316 | assert(dir1->sorted == dir1->nr); |
317 | assert(dir2->sorted == dir2->nr); | |
318 | while (i1 < dir1->nr && i2 < dir2->nr) { | |
319 | struct ref_entry *e1 = dir1->entries[i1]; | |
320 | struct ref_entry *e2 = dir2->entries[i2]; | |
b3fd060f MH |
321 | int cmp = strcmp(e1->name, e2->name); |
322 | if (cmp < 0) { | |
323 | retval = do_one_ref(base, fn, trim, flags, cb_data, e1); | |
324 | i1++; | |
325 | } else { | |
326 | retval = do_one_ref(base, fn, trim, flags, cb_data, e2); | |
327 | i2++; | |
328 | if (cmp == 0) { | |
329 | /* | |
330 | * There was a ref in array1 with the | |
331 | * same name; ignore it. | |
332 | */ | |
333 | i1++; | |
334 | } | |
335 | } | |
336 | if (retval) | |
337 | return retval; | |
338 | } | |
d3177275 MH |
339 | if (i1 < dir1->nr) |
340 | return do_for_each_ref_in_dir(dir1, i1, | |
341 | base, fn, trim, flags, cb_data); | |
342 | if (i2 < dir2->nr) | |
343 | return do_for_each_ref_in_dir(dir2, i2, | |
344 | base, fn, trim, flags, cb_data); | |
b3fd060f MH |
345 | return 0; |
346 | } | |
347 | ||
d66da478 MH |
348 | /* |
349 | * Return true iff refname1 and refname2 conflict with each other. | |
350 | * Two reference names conflict if one of them exactly matches the | |
351 | * leading components of the other; e.g., "foo/bar" conflicts with | |
352 | * both "foo" and with "foo/bar/baz" but not with "foo/bar" or | |
353 | * "foo/barbados". | |
354 | */ | |
355 | static int names_conflict(const char *refname1, const char *refname2) | |
356 | { | |
5a4d4947 MH |
357 | for (; *refname1 && *refname1 == *refname2; refname1++, refname2++) |
358 | ; | |
359 | return (*refname1 == '\0' && *refname2 == '/') | |
360 | || (*refname1 == '/' && *refname2 == '\0'); | |
361 | } | |
362 | ||
363 | struct name_conflict_cb { | |
364 | const char *refname; | |
365 | const char *oldrefname; | |
366 | const char *conflicting_refname; | |
367 | }; | |
368 | ||
369 | static int name_conflict_fn(const char *existingrefname, const unsigned char *sha1, | |
370 | int flags, void *cb_data) | |
371 | { | |
372 | struct name_conflict_cb *data = (struct name_conflict_cb *)cb_data; | |
373 | if (data->oldrefname && !strcmp(data->oldrefname, existingrefname)) | |
374 | return 0; | |
375 | if (names_conflict(data->refname, existingrefname)) { | |
376 | data->conflicting_refname = existingrefname; | |
377 | return 1; | |
d66da478 | 378 | } |
5a4d4947 | 379 | return 0; |
d66da478 MH |
380 | } |
381 | ||
bc5fd6d3 MH |
382 | /* |
383 | * Return true iff a reference named refname could be created without | |
5a4d4947 MH |
384 | * conflicting with the name of an existing reference in array. If |
385 | * oldrefname is non-NULL, ignore potential conflicts with oldrefname | |
386 | * (e.g., because oldrefname is scheduled for deletion in the same | |
bc5fd6d3 MH |
387 | * operation). |
388 | */ | |
389 | static int is_refname_available(const char *refname, const char *oldrefname, | |
d3177275 | 390 | struct ref_dir *dir) |
bc5fd6d3 | 391 | { |
5a4d4947 MH |
392 | struct name_conflict_cb data; |
393 | data.refname = refname; | |
394 | data.oldrefname = oldrefname; | |
395 | data.conflicting_refname = NULL; | |
396 | ||
d3177275 MH |
397 | sort_ref_dir(dir); |
398 | if (do_for_each_ref_in_dir(dir, 0, "", name_conflict_fn, | |
399 | 0, DO_FOR_EACH_INCLUDE_BROKEN, | |
400 | &data)) { | |
5a4d4947 MH |
401 | error("'%s' exists; cannot create '%s'", |
402 | data.conflicting_refname, refname); | |
403 | return 0; | |
bc5fd6d3 MH |
404 | } |
405 | return 1; | |
e1e22e37 LT |
406 | } |
407 | ||
5e290ff7 JH |
408 | /* |
409 | * Future: need to be in "struct repository" | |
410 | * when doing a full libification. | |
411 | */ | |
79c7ca54 MH |
412 | static struct ref_cache { |
413 | struct ref_cache *next; | |
5e290ff7 JH |
414 | char did_loose; |
415 | char did_packed; | |
d3177275 MH |
416 | struct ref_dir loose; |
417 | struct ref_dir packed; | |
ce40979c MH |
418 | /* The submodule name, or "" for the main repo. */ |
419 | char name[FLEX_ARRAY]; | |
79c7ca54 | 420 | } *ref_cache; |
0e88c130 | 421 | |
760c4512 | 422 | static void clear_packed_ref_cache(struct ref_cache *refs) |
e1e22e37 | 423 | { |
1b7edaf9 | 424 | if (refs->did_packed) |
d3177275 | 425 | clear_ref_dir(&refs->packed); |
760c4512 | 426 | refs->did_packed = 0; |
5e290ff7 | 427 | } |
e1e22e37 | 428 | |
760c4512 MH |
429 | static void clear_loose_ref_cache(struct ref_cache *refs) |
430 | { | |
431 | if (refs->did_loose) | |
d3177275 | 432 | clear_ref_dir(&refs->loose); |
760c4512 MH |
433 | refs->did_loose = 0; |
434 | } | |
435 | ||
79c7ca54 | 436 | static struct ref_cache *create_ref_cache(const char *submodule) |
e5dbf605 | 437 | { |
ce40979c | 438 | int len; |
79c7ca54 | 439 | struct ref_cache *refs; |
ce40979c MH |
440 | if (!submodule) |
441 | submodule = ""; | |
442 | len = strlen(submodule) + 1; | |
79c7ca54 | 443 | refs = xcalloc(1, sizeof(struct ref_cache) + len); |
ce40979c | 444 | memcpy(refs->name, submodule, len); |
e5dbf605 MH |
445 | return refs; |
446 | } | |
447 | ||
4349a668 | 448 | /* |
79c7ca54 | 449 | * Return a pointer to a ref_cache for the specified submodule. For |
4349a668 MH |
450 | * the main repository, use submodule==NULL. The returned structure |
451 | * will be allocated and initialized but not necessarily populated; it | |
452 | * should not be freed. | |
453 | */ | |
79c7ca54 | 454 | static struct ref_cache *get_ref_cache(const char *submodule) |
4349a668 | 455 | { |
79c7ca54 | 456 | struct ref_cache *refs = ref_cache; |
0e88c130 MH |
457 | if (!submodule) |
458 | submodule = ""; | |
459 | while (refs) { | |
460 | if (!strcmp(submodule, refs->name)) | |
461 | return refs; | |
462 | refs = refs->next; | |
4349a668 | 463 | } |
0e88c130 | 464 | |
79c7ca54 MH |
465 | refs = create_ref_cache(submodule); |
466 | refs->next = ref_cache; | |
467 | ref_cache = refs; | |
0e88c130 | 468 | return refs; |
4349a668 MH |
469 | } |
470 | ||
8be8bde7 | 471 | void invalidate_ref_cache(const char *submodule) |
f130b116 | 472 | { |
c5f29abd MH |
473 | struct ref_cache *refs = get_ref_cache(submodule); |
474 | clear_packed_ref_cache(refs); | |
475 | clear_loose_ref_cache(refs); | |
5e290ff7 | 476 | } |
e1e22e37 | 477 | |
bc5fd6d3 MH |
478 | /* |
479 | * Parse one line from a packed-refs file. Write the SHA1 to sha1. | |
480 | * Return a pointer to the refname within the line (null-terminated), | |
481 | * or NULL if there was a problem. | |
482 | */ | |
483 | static const char *parse_ref_line(char *line, unsigned char *sha1) | |
484 | { | |
485 | /* | |
486 | * 42: the answer to everything. | |
487 | * | |
488 | * In this case, it happens to be the answer to | |
489 | * 40 (length of sha1 hex representation) | |
490 | * +1 (space in between hex and name) | |
491 | * +1 (newline at the end of the line) | |
492 | */ | |
493 | int len = strlen(line) - 42; | |
494 | ||
495 | if (len <= 0) | |
496 | return NULL; | |
497 | if (get_sha1_hex(line, sha1) < 0) | |
498 | return NULL; | |
499 | if (!isspace(line[40])) | |
500 | return NULL; | |
501 | line += 41; | |
502 | if (isspace(*line)) | |
503 | return NULL; | |
504 | if (line[len] != '\n') | |
505 | return NULL; | |
506 | line[len] = 0; | |
507 | ||
508 | return line; | |
509 | } | |
510 | ||
d3177275 | 511 | static void read_packed_refs(FILE *f, struct ref_dir *dir) |
f4204ab9 | 512 | { |
e9c4c111 | 513 | struct ref_entry *last = NULL; |
f4204ab9 JH |
514 | char refline[PATH_MAX]; |
515 | int flag = REF_ISPACKED; | |
516 | ||
517 | while (fgets(refline, sizeof(refline), f)) { | |
518 | unsigned char sha1[20]; | |
dfefa935 | 519 | const char *refname; |
f4204ab9 JH |
520 | static const char header[] = "# pack-refs with:"; |
521 | ||
522 | if (!strncmp(refline, header, sizeof(header)-1)) { | |
523 | const char *traits = refline + sizeof(header) - 1; | |
524 | if (strstr(traits, " peeled ")) | |
525 | flag |= REF_KNOWS_PEELED; | |
526 | /* perhaps other traits later as well */ | |
527 | continue; | |
528 | } | |
529 | ||
dfefa935 MH |
530 | refname = parse_ref_line(refline, sha1); |
531 | if (refname) { | |
dd73ecd1 | 532 | last = create_ref_entry(refname, sha1, flag, 1); |
d3177275 | 533 | add_ref(dir, last); |
f4204ab9 JH |
534 | continue; |
535 | } | |
536 | if (last && | |
537 | refline[0] == '^' && | |
538 | strlen(refline) == 42 && | |
539 | refline[41] == '\n' && | |
540 | !get_sha1_hex(refline + 1, sha1)) | |
593f1bb8 | 541 | hashcpy(last->u.value.peeled, sha1); |
f4204ab9 | 542 | } |
f4204ab9 JH |
543 | } |
544 | ||
d3177275 | 545 | static struct ref_dir *get_packed_refs(struct ref_cache *refs) |
5e290ff7 | 546 | { |
4349a668 MH |
547 | if (!refs->did_packed) { |
548 | const char *packed_refs_file; | |
549 | FILE *f; | |
0bad611b | 550 | |
316b097a MH |
551 | if (*refs->name) |
552 | packed_refs_file = git_path_submodule(refs->name, "packed-refs"); | |
4349a668 MH |
553 | else |
554 | packed_refs_file = git_path("packed-refs"); | |
555 | f = fopen(packed_refs_file, "r"); | |
e1e22e37 | 556 | if (f) { |
2c5c66be | 557 | read_packed_refs(f, &refs->packed); |
e1e22e37 | 558 | fclose(f); |
e1e22e37 | 559 | } |
0bad611b | 560 | refs->did_packed = 1; |
e1e22e37 | 561 | } |
e9c4c111 | 562 | return &refs->packed; |
e1e22e37 LT |
563 | } |
564 | ||
30249ee6 MH |
565 | void add_packed_ref(const char *refname, const unsigned char *sha1) |
566 | { | |
567 | add_ref(get_packed_refs(get_ref_cache(NULL)), | |
568 | create_ref_entry(refname, sha1, REF_ISPACKED, 1)); | |
569 | } | |
570 | ||
3b124823 | 571 | static void get_ref_dir(struct ref_cache *refs, const char *base, |
d3177275 | 572 | struct ref_dir *dir) |
e1e22e37 | 573 | { |
d3177275 | 574 | DIR *d; |
0bad611b HV |
575 | const char *path; |
576 | ||
3b124823 MH |
577 | if (*refs->name) |
578 | path = git_path_submodule(refs->name, "%s", base); | |
0bad611b HV |
579 | else |
580 | path = git_path("%s", base); | |
581 | ||
d3177275 MH |
582 | d = opendir(path); |
583 | if (d) { | |
e1e22e37 LT |
584 | struct dirent *de; |
585 | int baselen = strlen(base); | |
dfefa935 | 586 | char *refname = xmalloc(baselen + 257); |
e1e22e37 | 587 | |
dfefa935 | 588 | memcpy(refname, base, baselen); |
e1e22e37 | 589 | if (baselen && base[baselen-1] != '/') |
dfefa935 | 590 | refname[baselen++] = '/'; |
e1e22e37 | 591 | |
d3177275 | 592 | while ((de = readdir(d)) != NULL) { |
e1e22e37 LT |
593 | unsigned char sha1[20]; |
594 | struct stat st; | |
8da19775 | 595 | int flag; |
e1e22e37 | 596 | int namelen; |
0bad611b | 597 | const char *refdir; |
e1e22e37 LT |
598 | |
599 | if (de->d_name[0] == '.') | |
600 | continue; | |
601 | namelen = strlen(de->d_name); | |
602 | if (namelen > 255) | |
603 | continue; | |
604 | if (has_extension(de->d_name, ".lock")) | |
605 | continue; | |
dfefa935 | 606 | memcpy(refname + baselen, de->d_name, namelen+1); |
3b124823 MH |
607 | refdir = *refs->name |
608 | ? git_path_submodule(refs->name, "%s", refname) | |
dfefa935 | 609 | : git_path("%s", refname); |
0bad611b | 610 | if (stat(refdir, &st) < 0) |
e1e22e37 LT |
611 | continue; |
612 | if (S_ISDIR(st.st_mode)) { | |
d3177275 | 613 | get_ref_dir(refs, refname, dir); |
e1e22e37 LT |
614 | continue; |
615 | } | |
3b124823 | 616 | if (*refs->name) { |
f8948e2f | 617 | hashclr(sha1); |
0bad611b | 618 | flag = 0; |
3b124823 | 619 | if (resolve_gitlink_ref(refs->name, refname, sha1) < 0) { |
0bad611b | 620 | hashclr(sha1); |
98ac34b2 | 621 | flag |= REF_ISBROKEN; |
0bad611b | 622 | } |
dfefa935 | 623 | } else if (read_ref_full(refname, sha1, 1, &flag)) { |
09116a1c JH |
624 | hashclr(sha1); |
625 | flag |= REF_ISBROKEN; | |
626 | } | |
d3177275 | 627 | add_ref(dir, create_ref_entry(refname, sha1, flag, 1)); |
e1e22e37 | 628 | } |
dfefa935 | 629 | free(refname); |
d3177275 | 630 | closedir(d); |
e1e22e37 | 631 | } |
e1e22e37 LT |
632 | } |
633 | ||
d3177275 | 634 | static struct ref_dir *get_loose_refs(struct ref_cache *refs) |
e1e22e37 | 635 | { |
4349a668 | 636 | if (!refs->did_loose) { |
3b124823 | 637 | get_ref_dir(refs, "refs", &refs->loose); |
4349a668 | 638 | refs->did_loose = 1; |
e1e22e37 | 639 | } |
2c5c66be | 640 | return &refs->loose; |
e1e22e37 LT |
641 | } |
642 | ||
ca8db142 LT |
643 | /* We allow "recursive" symbolic refs. Only within reason, though */ |
644 | #define MAXDEPTH 5 | |
0ebde32c LT |
645 | #define MAXREFLEN (1024) |
646 | ||
e5fa45c1 JH |
647 | /* |
648 | * Called by resolve_gitlink_ref_recursive() after it failed to read | |
b0626608 MH |
649 | * from the loose refs in ref_cache refs. Find <refname> in the |
650 | * packed-refs file for the submodule. | |
e5fa45c1 | 651 | */ |
b0626608 | 652 | static int resolve_gitlink_packed_ref(struct ref_cache *refs, |
85be1fe3 | 653 | const char *refname, unsigned char *sha1) |
0ebde32c | 654 | { |
2c5c66be | 655 | struct ref_entry *ref; |
d3177275 | 656 | struct ref_dir *dir = get_packed_refs(refs); |
0ebde32c | 657 | |
d3177275 | 658 | ref = search_ref_dir(dir, refname); |
b0626608 MH |
659 | if (ref == NULL) |
660 | return -1; | |
661 | ||
593f1bb8 | 662 | memcpy(sha1, ref->u.value.sha1, 20); |
b0626608 | 663 | return 0; |
0ebde32c LT |
664 | } |
665 | ||
b0626608 | 666 | static int resolve_gitlink_ref_recursive(struct ref_cache *refs, |
85be1fe3 | 667 | const char *refname, unsigned char *sha1, |
dfefa935 | 668 | int recursion) |
0ebde32c | 669 | { |
064d51dc | 670 | int fd, len; |
0ebde32c | 671 | char buffer[128], *p; |
064d51dc | 672 | char *path; |
0ebde32c | 673 | |
064d51dc | 674 | if (recursion > MAXDEPTH || strlen(refname) > MAXREFLEN) |
0ebde32c | 675 | return -1; |
064d51dc MH |
676 | path = *refs->name |
677 | ? git_path_submodule(refs->name, "%s", refname) | |
678 | : git_path("%s", refname); | |
679 | fd = open(path, O_RDONLY); | |
0ebde32c | 680 | if (fd < 0) |
b0626608 | 681 | return resolve_gitlink_packed_ref(refs, refname, sha1); |
0ebde32c LT |
682 | |
683 | len = read(fd, buffer, sizeof(buffer)-1); | |
684 | close(fd); | |
685 | if (len < 0) | |
686 | return -1; | |
687 | while (len && isspace(buffer[len-1])) | |
688 | len--; | |
689 | buffer[len] = 0; | |
690 | ||
691 | /* Was it a detached head or an old-fashioned symlink? */ | |
85be1fe3 | 692 | if (!get_sha1_hex(buffer, sha1)) |
0ebde32c LT |
693 | return 0; |
694 | ||
695 | /* Symref? */ | |
696 | if (strncmp(buffer, "ref:", 4)) | |
697 | return -1; | |
698 | p = buffer + 4; | |
699 | while (isspace(*p)) | |
700 | p++; | |
701 | ||
064d51dc | 702 | return resolve_gitlink_ref_recursive(refs, p, sha1, recursion+1); |
0ebde32c LT |
703 | } |
704 | ||
85be1fe3 | 705 | int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1) |
0ebde32c LT |
706 | { |
707 | int len = strlen(path), retval; | |
064d51dc | 708 | char *submodule; |
b0626608 | 709 | struct ref_cache *refs; |
0ebde32c LT |
710 | |
711 | while (len && path[len-1] == '/') | |
712 | len--; | |
713 | if (!len) | |
714 | return -1; | |
b0626608 MH |
715 | submodule = xstrndup(path, len); |
716 | refs = get_ref_cache(submodule); | |
717 | free(submodule); | |
718 | ||
064d51dc | 719 | retval = resolve_gitlink_ref_recursive(refs, refname, sha1, 0); |
0ebde32c LT |
720 | return retval; |
721 | } | |
ca8db142 | 722 | |
4886b89f | 723 | /* |
c224ca7f MH |
724 | * Try to read ref from the packed references. On success, set sha1 |
725 | * and return 0; otherwise, return -1. | |
4886b89f | 726 | */ |
dfefa935 | 727 | static int get_packed_ref(const char *refname, unsigned char *sha1) |
c224ca7f | 728 | { |
d3177275 MH |
729 | struct ref_dir *packed = get_packed_refs(get_ref_cache(NULL)); |
730 | struct ref_entry *entry = search_ref_dir(packed, refname); | |
2c5c66be | 731 | if (entry) { |
593f1bb8 | 732 | hashcpy(sha1, entry->u.value.sha1); |
2c5c66be | 733 | return 0; |
c224ca7f MH |
734 | } |
735 | return -1; | |
736 | } | |
737 | ||
8d68493f | 738 | const char *resolve_ref_unsafe(const char *refname, unsigned char *sha1, int reading, int *flag) |
8a65ff76 | 739 | { |
0104ca09 HO |
740 | int depth = MAXDEPTH; |
741 | ssize_t len; | |
a876ed83 | 742 | char buffer[256]; |
dfefa935 | 743 | static char refname_buffer[256]; |
ca8db142 | 744 | |
8da19775 JH |
745 | if (flag) |
746 | *flag = 0; | |
747 | ||
dfefa935 | 748 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) |
8384d788 MH |
749 | return NULL; |
750 | ||
a876ed83 | 751 | for (;;) { |
55956350 | 752 | char path[PATH_MAX]; |
a876ed83 JH |
753 | struct stat st; |
754 | char *buf; | |
755 | int fd; | |
8a65ff76 | 756 | |
a876ed83 JH |
757 | if (--depth < 0) |
758 | return NULL; | |
ca8db142 | 759 | |
dfefa935 | 760 | git_snpath(path, sizeof(path), "%s", refname); |
c224ca7f | 761 | |
a876ed83 | 762 | if (lstat(path, &st) < 0) { |
c224ca7f MH |
763 | if (errno != ENOENT) |
764 | return NULL; | |
765 | /* | |
766 | * The loose reference file does not exist; | |
767 | * check for a packed reference. | |
768 | */ | |
dfefa935 | 769 | if (!get_packed_ref(refname, sha1)) { |
c224ca7f MH |
770 | if (flag) |
771 | *flag |= REF_ISPACKED; | |
dfefa935 | 772 | return refname; |
434cd0cd | 773 | } |
c224ca7f MH |
774 | /* The reference is not a packed reference, either. */ |
775 | if (reading) { | |
a876ed83 | 776 | return NULL; |
c224ca7f MH |
777 | } else { |
778 | hashclr(sha1); | |
dfefa935 | 779 | return refname; |
c224ca7f | 780 | } |
a876ed83 | 781 | } |
ca8db142 | 782 | |
a876ed83 JH |
783 | /* Follow "normalized" - ie "refs/.." symlinks by hand */ |
784 | if (S_ISLNK(st.st_mode)) { | |
785 | len = readlink(path, buffer, sizeof(buffer)-1); | |
7bb2bf8e MH |
786 | if (len < 0) |
787 | return NULL; | |
b54cb795 | 788 | buffer[len] = 0; |
1f58a038 MH |
789 | if (!prefixcmp(buffer, "refs/") && |
790 | !check_refname_format(buffer, 0)) { | |
dfefa935 MH |
791 | strcpy(refname_buffer, buffer); |
792 | refname = refname_buffer; | |
8da19775 JH |
793 | if (flag) |
794 | *flag |= REF_ISSYMREF; | |
a876ed83 JH |
795 | continue; |
796 | } | |
ca8db142 | 797 | } |
a876ed83 | 798 | |
7a21632f DS |
799 | /* Is it a directory? */ |
800 | if (S_ISDIR(st.st_mode)) { | |
801 | errno = EISDIR; | |
802 | return NULL; | |
803 | } | |
804 | ||
a876ed83 JH |
805 | /* |
806 | * Anything else, just open it and try to use it as | |
807 | * a ref | |
808 | */ | |
809 | fd = open(path, O_RDONLY); | |
810 | if (fd < 0) | |
811 | return NULL; | |
93d26e4c | 812 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
a876ed83 | 813 | close(fd); |
28775050 MH |
814 | if (len < 0) |
815 | return NULL; | |
816 | while (len && isspace(buffer[len-1])) | |
817 | len--; | |
818 | buffer[len] = '\0'; | |
a876ed83 JH |
819 | |
820 | /* | |
821 | * Is it a symbolic ref? | |
822 | */ | |
28775050 | 823 | if (prefixcmp(buffer, "ref:")) |
a876ed83 | 824 | break; |
55956350 JH |
825 | if (flag) |
826 | *flag |= REF_ISSYMREF; | |
a876ed83 | 827 | buf = buffer + 4; |
28775050 MH |
828 | while (isspace(*buf)) |
829 | buf++; | |
313fb010 | 830 | if (check_refname_format(buf, REFNAME_ALLOW_ONELEVEL)) { |
55956350 JH |
831 | if (flag) |
832 | *flag |= REF_ISBROKEN; | |
313fb010 MH |
833 | return NULL; |
834 | } | |
dfefa935 | 835 | refname = strcpy(refname_buffer, buf); |
8a65ff76 | 836 | } |
f989fea0 MH |
837 | /* Please note that FETCH_HEAD has a second line containing other data. */ |
838 | if (get_sha1_hex(buffer, sha1) || (buffer[40] != '\0' && !isspace(buffer[40]))) { | |
55956350 JH |
839 | if (flag) |
840 | *flag |= REF_ISBROKEN; | |
a876ed83 | 841 | return NULL; |
629cd3ac | 842 | } |
dfefa935 | 843 | return refname; |
a876ed83 JH |
844 | } |
845 | ||
96ec7b1e NTND |
846 | char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag) |
847 | { | |
8cad4744 | 848 | const char *ret = resolve_ref_unsafe(ref, sha1, reading, flag); |
96ec7b1e NTND |
849 | return ret ? xstrdup(ret) : NULL; |
850 | } | |
851 | ||
d08bae7e IL |
852 | /* The argument to filter_refs */ |
853 | struct ref_filter { | |
854 | const char *pattern; | |
855 | each_ref_fn *fn; | |
856 | void *cb_data; | |
857 | }; | |
858 | ||
dfefa935 | 859 | int read_ref_full(const char *refname, unsigned char *sha1, int reading, int *flags) |
a876ed83 | 860 | { |
8d68493f | 861 | if (resolve_ref_unsafe(refname, sha1, reading, flags)) |
a876ed83 JH |
862 | return 0; |
863 | return -1; | |
8a65ff76 LT |
864 | } |
865 | ||
dfefa935 | 866 | int read_ref(const char *refname, unsigned char *sha1) |
c6893323 | 867 | { |
dfefa935 | 868 | return read_ref_full(refname, sha1, 1, NULL); |
c6893323 NTND |
869 | } |
870 | ||
bc5fd6d3 | 871 | int ref_exists(const char *refname) |
ef06b918 | 872 | { |
bc5fd6d3 MH |
873 | unsigned char sha1[20]; |
874 | return !!resolve_ref_unsafe(refname, sha1, 1, NULL); | |
ef06b918 JH |
875 | } |
876 | ||
85be1fe3 | 877 | static int filter_refs(const char *refname, const unsigned char *sha1, int flags, |
dfefa935 | 878 | void *data) |
d08bae7e IL |
879 | { |
880 | struct ref_filter *filter = (struct ref_filter *)data; | |
dfefa935 | 881 | if (fnmatch(filter->pattern, refname, 0)) |
d08bae7e | 882 | return 0; |
85be1fe3 | 883 | return filter->fn(refname, sha1, flags, filter->cb_data); |
d08bae7e IL |
884 | } |
885 | ||
dfefa935 | 886 | int peel_ref(const char *refname, unsigned char *sha1) |
cf0adba7 JH |
887 | { |
888 | int flag; | |
889 | unsigned char base[20]; | |
890 | struct object *o; | |
891 | ||
dfefa935 MH |
892 | if (current_ref && (current_ref->name == refname |
893 | || !strcmp(current_ref->name, refname))) { | |
0ae91be0 | 894 | if (current_ref->flag & REF_KNOWS_PEELED) { |
593f1bb8 | 895 | hashcpy(sha1, current_ref->u.value.peeled); |
0ae91be0 SP |
896 | return 0; |
897 | } | |
593f1bb8 | 898 | hashcpy(base, current_ref->u.value.sha1); |
0ae91be0 SP |
899 | goto fallback; |
900 | } | |
901 | ||
dfefa935 | 902 | if (read_ref_full(refname, base, 1, &flag)) |
cf0adba7 JH |
903 | return -1; |
904 | ||
905 | if ((flag & REF_ISPACKED)) { | |
d3177275 MH |
906 | struct ref_dir *dir = get_packed_refs(get_ref_cache(NULL)); |
907 | struct ref_entry *r = search_ref_dir(dir, refname); | |
cf0adba7 | 908 | |
e9c4c111 | 909 | if (r != NULL && r->flag & REF_KNOWS_PEELED) { |
593f1bb8 | 910 | hashcpy(sha1, r->u.value.peeled); |
e9c4c111 | 911 | return 0; |
cf0adba7 | 912 | } |
cf0adba7 JH |
913 | } |
914 | ||
0ae91be0 | 915 | fallback: |
cf0adba7 | 916 | o = parse_object(base); |
8c87dc77 | 917 | if (o && o->type == OBJ_TAG) { |
dfefa935 | 918 | o = deref_tag(o, refname, 0); |
cf0adba7 JH |
919 | if (o) { |
920 | hashcpy(sha1, o->sha1); | |
921 | return 0; | |
922 | } | |
923 | } | |
924 | return -1; | |
925 | } | |
926 | ||
bc5fd6d3 MH |
927 | struct warn_if_dangling_data { |
928 | FILE *fp; | |
929 | const char *refname; | |
930 | const char *msg_fmt; | |
931 | }; | |
932 | ||
933 | static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1, | |
934 | int flags, void *cb_data) | |
935 | { | |
936 | struct warn_if_dangling_data *d = cb_data; | |
937 | const char *resolves_to; | |
938 | unsigned char junk[20]; | |
939 | ||
940 | if (!(flags & REF_ISSYMREF)) | |
941 | return 0; | |
942 | ||
943 | resolves_to = resolve_ref_unsafe(refname, junk, 0, NULL); | |
944 | if (!resolves_to || strcmp(resolves_to, d->refname)) | |
945 | return 0; | |
946 | ||
947 | fprintf(d->fp, d->msg_fmt, refname); | |
948 | return 0; | |
949 | } | |
950 | ||
951 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) | |
952 | { | |
953 | struct warn_if_dangling_data data; | |
954 | ||
955 | data.fp = fp; | |
956 | data.refname = refname; | |
957 | data.msg_fmt = msg_fmt; | |
958 | for_each_rawref(warn_if_dangling_symref, &data); | |
959 | } | |
960 | ||
0bad611b HV |
961 | static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn, |
962 | int trim, int flags, void *cb_data) | |
8a65ff76 | 963 | { |
316b097a | 964 | struct ref_cache *refs = get_ref_cache(submodule); |
d3177275 MH |
965 | struct ref_dir *packed_refs = get_packed_refs(refs); |
966 | struct ref_dir *loose_refs = get_loose_refs(refs); | |
967 | sort_ref_dir(packed_refs); | |
968 | sort_ref_dir(loose_refs); | |
969 | return do_for_each_ref_in_dirs(packed_refs, | |
970 | loose_refs, | |
971 | base, fn, trim, flags, cb_data); | |
8a65ff76 LT |
972 | } |
973 | ||
0bad611b | 974 | static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data) |
723c31fe LT |
975 | { |
976 | unsigned char sha1[20]; | |
8da19775 JH |
977 | int flag; |
978 | ||
0bad611b HV |
979 | if (submodule) { |
980 | if (resolve_gitlink_ref(submodule, "HEAD", sha1) == 0) | |
981 | return fn("HEAD", sha1, 0, cb_data); | |
982 | ||
983 | return 0; | |
984 | } | |
985 | ||
c6893323 | 986 | if (!read_ref_full("HEAD", sha1, 1, &flag)) |
8da19775 | 987 | return fn("HEAD", sha1, flag, cb_data); |
0bad611b | 988 | |
2f34ba32 | 989 | return 0; |
723c31fe LT |
990 | } |
991 | ||
0bad611b HV |
992 | int head_ref(each_ref_fn fn, void *cb_data) |
993 | { | |
994 | return do_head_ref(NULL, fn, cb_data); | |
995 | } | |
996 | ||
9ef6aeb0 HV |
997 | int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
998 | { | |
999 | return do_head_ref(submodule, fn, cb_data); | |
1000 | } | |
1001 | ||
cb5d709f | 1002 | int for_each_ref(each_ref_fn fn, void *cb_data) |
8a65ff76 | 1003 | { |
b3cfc406 | 1004 | return do_for_each_ref(NULL, "", fn, 0, 0, cb_data); |
a62be77f SE |
1005 | } |
1006 | ||
9ef6aeb0 HV |
1007 | int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
1008 | { | |
b3cfc406 | 1009 | return do_for_each_ref(submodule, "", fn, 0, 0, cb_data); |
a62be77f SE |
1010 | } |
1011 | ||
2a8177b6 CC |
1012 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) |
1013 | { | |
0bad611b | 1014 | return do_for_each_ref(NULL, prefix, fn, strlen(prefix), 0, cb_data); |
2a8177b6 CC |
1015 | } |
1016 | ||
9ef6aeb0 HV |
1017 | int for_each_ref_in_submodule(const char *submodule, const char *prefix, |
1018 | each_ref_fn fn, void *cb_data) | |
1019 | { | |
1020 | return do_for_each_ref(submodule, prefix, fn, strlen(prefix), 0, cb_data); | |
2a8177b6 CC |
1021 | } |
1022 | ||
cb5d709f | 1023 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 1024 | { |
2a8177b6 | 1025 | return for_each_ref_in("refs/tags/", fn, cb_data); |
a62be77f SE |
1026 | } |
1027 | ||
9ef6aeb0 HV |
1028 | int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
1029 | { | |
1030 | return for_each_ref_in_submodule(submodule, "refs/tags/", fn, cb_data); | |
1031 | } | |
1032 | ||
cb5d709f | 1033 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 1034 | { |
2a8177b6 | 1035 | return for_each_ref_in("refs/heads/", fn, cb_data); |
a62be77f SE |
1036 | } |
1037 | ||
9ef6aeb0 HV |
1038 | int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
1039 | { | |
1040 | return for_each_ref_in_submodule(submodule, "refs/heads/", fn, cb_data); | |
1041 | } | |
1042 | ||
cb5d709f | 1043 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
a62be77f | 1044 | { |
2a8177b6 | 1045 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
f8948e2f JH |
1046 | } |
1047 | ||
9ef6aeb0 HV |
1048 | int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
1049 | { | |
1050 | return for_each_ref_in_submodule(submodule, "refs/remotes/", fn, cb_data); | |
1051 | } | |
1052 | ||
29268700 CC |
1053 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) |
1054 | { | |
0bad611b | 1055 | return do_for_each_ref(NULL, "refs/replace/", fn, 13, 0, cb_data); |
29268700 CC |
1056 | } |
1057 | ||
a1bea2c1 JT |
1058 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) |
1059 | { | |
1060 | struct strbuf buf = STRBUF_INIT; | |
1061 | int ret = 0; | |
1062 | unsigned char sha1[20]; | |
1063 | int flag; | |
1064 | ||
1065 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); | |
c6893323 | 1066 | if (!read_ref_full(buf.buf, sha1, 1, &flag)) |
a1bea2c1 JT |
1067 | ret = fn(buf.buf, sha1, flag, cb_data); |
1068 | strbuf_release(&buf); | |
1069 | ||
1070 | return ret; | |
1071 | } | |
1072 | ||
1073 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
1074 | { | |
1075 | struct strbuf buf = STRBUF_INIT; | |
1076 | int ret; | |
1077 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
1078 | ret = do_for_each_ref(NULL, buf.buf, fn, 0, 0, cb_data); | |
1079 | strbuf_release(&buf); | |
1080 | return ret; | |
1081 | } | |
1082 | ||
b09fe971 IL |
1083 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
1084 | const char *prefix, void *cb_data) | |
d08bae7e IL |
1085 | { |
1086 | struct strbuf real_pattern = STRBUF_INIT; | |
1087 | struct ref_filter filter; | |
d08bae7e IL |
1088 | int ret; |
1089 | ||
b09fe971 | 1090 | if (!prefix && prefixcmp(pattern, "refs/")) |
d08bae7e | 1091 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
1092 | else if (prefix) |
1093 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
1094 | strbuf_addstr(&real_pattern, pattern); |
1095 | ||
894a9d33 | 1096 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 1097 | /* Append implied '/' '*' if not present. */ |
d08bae7e IL |
1098 | if (real_pattern.buf[real_pattern.len - 1] != '/') |
1099 | strbuf_addch(&real_pattern, '/'); | |
1100 | /* No need to check for '*', there is none. */ | |
1101 | strbuf_addch(&real_pattern, '*'); | |
1102 | } | |
1103 | ||
1104 | filter.pattern = real_pattern.buf; | |
1105 | filter.fn = fn; | |
1106 | filter.cb_data = cb_data; | |
1107 | ret = for_each_ref(filter_refs, &filter); | |
1108 | ||
1109 | strbuf_release(&real_pattern); | |
1110 | return ret; | |
1111 | } | |
1112 | ||
b09fe971 IL |
1113 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
1114 | { | |
1115 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
1116 | } | |
1117 | ||
f8948e2f JH |
1118 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
1119 | { | |
b3cfc406 | 1120 | return do_for_each_ref(NULL, "", fn, 0, |
f8948e2f | 1121 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); |
8a65ff76 LT |
1122 | } |
1123 | ||
4577e483 | 1124 | const char *prettify_refname(const char *name) |
a9c37a72 | 1125 | { |
a9c37a72 DB |
1126 | return name + ( |
1127 | !prefixcmp(name, "refs/heads/") ? 11 : | |
1128 | !prefixcmp(name, "refs/tags/") ? 10 : | |
1129 | !prefixcmp(name, "refs/remotes/") ? 13 : | |
1130 | 0); | |
1131 | } | |
1132 | ||
79803322 SP |
1133 | const char *ref_rev_parse_rules[] = { |
1134 | "%.*s", | |
1135 | "refs/%.*s", | |
1136 | "refs/tags/%.*s", | |
1137 | "refs/heads/%.*s", | |
1138 | "refs/remotes/%.*s", | |
1139 | "refs/remotes/%.*s/HEAD", | |
1140 | NULL | |
1141 | }; | |
1142 | ||
1143 | int refname_match(const char *abbrev_name, const char *full_name, const char **rules) | |
1144 | { | |
1145 | const char **p; | |
1146 | const int abbrev_name_len = strlen(abbrev_name); | |
1147 | ||
1148 | for (p = rules; *p; p++) { | |
1149 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { | |
1150 | return 1; | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | return 0; | |
1155 | } | |
1156 | ||
e5f38ec3 | 1157 | static struct ref_lock *verify_lock(struct ref_lock *lock, |
4bd18c43 SP |
1158 | const unsigned char *old_sha1, int mustexist) |
1159 | { | |
c6893323 | 1160 | if (read_ref_full(lock->ref_name, lock->old_sha1, mustexist, NULL)) { |
434cd0cd | 1161 | error("Can't verify ref %s", lock->ref_name); |
4bd18c43 SP |
1162 | unlock_ref(lock); |
1163 | return NULL; | |
1164 | } | |
a89fccd2 | 1165 | if (hashcmp(lock->old_sha1, old_sha1)) { |
434cd0cd | 1166 | error("Ref %s is at %s but expected %s", lock->ref_name, |
4bd18c43 SP |
1167 | sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1)); |
1168 | unlock_ref(lock); | |
1169 | return NULL; | |
1170 | } | |
1171 | return lock; | |
1172 | } | |
1173 | ||
7155b727 | 1174 | static int remove_empty_directories(const char *file) |
bc7127ef JH |
1175 | { |
1176 | /* we want to create a file but there is a directory there; | |
1177 | * if that is an empty directory (or a directory that contains | |
1178 | * only empty directories), remove them. | |
1179 | */ | |
7155b727 JS |
1180 | struct strbuf path; |
1181 | int result; | |
bc7127ef | 1182 | |
7155b727 JS |
1183 | strbuf_init(&path, 20); |
1184 | strbuf_addstr(&path, file); | |
1185 | ||
a0f4afbe | 1186 | result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY); |
7155b727 JS |
1187 | |
1188 | strbuf_release(&path); | |
1189 | ||
1190 | return result; | |
bc7127ef JH |
1191 | } |
1192 | ||
ff74f7f1 JH |
1193 | /* |
1194 | * *string and *len will only be substituted, and *string returned (for | |
1195 | * later free()ing) if the string passed in is a magic short-hand form | |
1196 | * to name a branch. | |
1197 | */ | |
1198 | static char *substitute_branch_name(const char **string, int *len) | |
1199 | { | |
1200 | struct strbuf buf = STRBUF_INIT; | |
1201 | int ret = interpret_branch_name(*string, &buf); | |
1202 | ||
1203 | if (ret == *len) { | |
1204 | size_t size; | |
1205 | *string = strbuf_detach(&buf, &size); | |
1206 | *len = size; | |
1207 | return (char *)*string; | |
1208 | } | |
1209 | ||
1210 | return NULL; | |
1211 | } | |
1212 | ||
1213 | int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
1214 | { | |
1215 | char *last_branch = substitute_branch_name(&str, &len); | |
1216 | const char **p, *r; | |
1217 | int refs_found = 0; | |
1218 | ||
1219 | *ref = NULL; | |
1220 | for (p = ref_rev_parse_rules; *p; p++) { | |
1221 | char fullref[PATH_MAX]; | |
1222 | unsigned char sha1_from_ref[20]; | |
1223 | unsigned char *this_result; | |
1224 | int flag; | |
1225 | ||
1226 | this_result = refs_found ? sha1_from_ref : sha1; | |
1227 | mksnpath(fullref, sizeof(fullref), *p, len, str); | |
8cad4744 | 1228 | r = resolve_ref_unsafe(fullref, this_result, 1, &flag); |
ff74f7f1 JH |
1229 | if (r) { |
1230 | if (!refs_found++) | |
1231 | *ref = xstrdup(r); | |
1232 | if (!warn_ambiguous_refs) | |
1233 | break; | |
55956350 | 1234 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD")) { |
ff74f7f1 | 1235 | warning("ignoring dangling symref %s.", fullref); |
55956350 JH |
1236 | } else if ((flag & REF_ISBROKEN) && strchr(fullref, '/')) { |
1237 | warning("ignoring broken ref %s.", fullref); | |
1238 | } | |
ff74f7f1 JH |
1239 | } |
1240 | free(last_branch); | |
1241 | return refs_found; | |
1242 | } | |
1243 | ||
1244 | int dwim_log(const char *str, int len, unsigned char *sha1, char **log) | |
1245 | { | |
1246 | char *last_branch = substitute_branch_name(&str, &len); | |
1247 | const char **p; | |
1248 | int logs_found = 0; | |
1249 | ||
1250 | *log = NULL; | |
1251 | for (p = ref_rev_parse_rules; *p; p++) { | |
1252 | struct stat st; | |
1253 | unsigned char hash[20]; | |
1254 | char path[PATH_MAX]; | |
1255 | const char *ref, *it; | |
1256 | ||
1257 | mksnpath(path, sizeof(path), *p, len, str); | |
8cad4744 | 1258 | ref = resolve_ref_unsafe(path, hash, 1, NULL); |
ff74f7f1 JH |
1259 | if (!ref) |
1260 | continue; | |
1261 | if (!stat(git_path("logs/%s", path), &st) && | |
1262 | S_ISREG(st.st_mode)) | |
1263 | it = path; | |
1264 | else if (strcmp(ref, path) && | |
1265 | !stat(git_path("logs/%s", ref), &st) && | |
1266 | S_ISREG(st.st_mode)) | |
1267 | it = ref; | |
1268 | else | |
1269 | continue; | |
1270 | if (!logs_found++) { | |
1271 | *log = xstrdup(it); | |
1272 | hashcpy(sha1, hash); | |
1273 | } | |
1274 | if (!warn_ambiguous_refs) | |
1275 | break; | |
1276 | } | |
1277 | free(last_branch); | |
1278 | return logs_found; | |
1279 | } | |
1280 | ||
dfefa935 MH |
1281 | static struct ref_lock *lock_ref_sha1_basic(const char *refname, |
1282 | const unsigned char *old_sha1, | |
1283 | int flags, int *type_p) | |
4bd18c43 | 1284 | { |
434cd0cd | 1285 | char *ref_file; |
dfefa935 | 1286 | const char *orig_refname = refname; |
4bd18c43 | 1287 | struct ref_lock *lock; |
5cc3cef9 | 1288 | int last_errno = 0; |
acd3b9ec | 1289 | int type, lflags; |
4431fcc4 | 1290 | int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); |
5bdd8d4a | 1291 | int missing = 0; |
4bd18c43 SP |
1292 | |
1293 | lock = xcalloc(1, sizeof(struct ref_lock)); | |
1294 | lock->lock_fd = -1; | |
1295 | ||
8d68493f | 1296 | refname = resolve_ref_unsafe(refname, lock->old_sha1, mustexist, &type); |
dfefa935 | 1297 | if (!refname && errno == EISDIR) { |
bc7127ef JH |
1298 | /* we are trying to lock foo but we used to |
1299 | * have foo/bar which now does not exist; | |
1300 | * it is normal for the empty directory 'foo' | |
1301 | * to remain. | |
1302 | */ | |
dfefa935 | 1303 | ref_file = git_path("%s", orig_refname); |
5cc3cef9 JH |
1304 | if (remove_empty_directories(ref_file)) { |
1305 | last_errno = errno; | |
dfefa935 | 1306 | error("there are still refs under '%s'", orig_refname); |
5cc3cef9 JH |
1307 | goto error_return; |
1308 | } | |
8d68493f | 1309 | refname = resolve_ref_unsafe(orig_refname, lock->old_sha1, mustexist, &type); |
bc7127ef | 1310 | } |
68db31cc SV |
1311 | if (type_p) |
1312 | *type_p = type; | |
dfefa935 | 1313 | if (!refname) { |
5cc3cef9 | 1314 | last_errno = errno; |
818f477c | 1315 | error("unable to resolve reference %s: %s", |
dfefa935 | 1316 | orig_refname, strerror(errno)); |
5cc3cef9 | 1317 | goto error_return; |
4bd18c43 | 1318 | } |
5bdd8d4a | 1319 | missing = is_null_sha1(lock->old_sha1); |
c976d415 LH |
1320 | /* When the ref did not exist and we are creating it, |
1321 | * make sure there is no existing ref that is packed | |
1322 | * whose name begins with our refname, nor a ref whose | |
1323 | * name is a proper prefix of our refname. | |
1324 | */ | |
5bdd8d4a | 1325 | if (missing && |
316b097a | 1326 | !is_refname_available(refname, NULL, get_packed_refs(get_ref_cache(NULL)))) { |
f475e08e | 1327 | last_errno = ENOTDIR; |
c976d415 | 1328 | goto error_return; |
f475e08e | 1329 | } |
22a3844e | 1330 | |
c33d5174 | 1331 | lock->lk = xcalloc(1, sizeof(struct lock_file)); |
4bd18c43 | 1332 | |
acd3b9ec JH |
1333 | lflags = LOCK_DIE_ON_ERROR; |
1334 | if (flags & REF_NODEREF) { | |
dfefa935 | 1335 | refname = orig_refname; |
acd3b9ec JH |
1336 | lflags |= LOCK_NODEREF; |
1337 | } | |
dfefa935 MH |
1338 | lock->ref_name = xstrdup(refname); |
1339 | lock->orig_ref_name = xstrdup(orig_refname); | |
1340 | ref_file = git_path("%s", refname); | |
5bdd8d4a | 1341 | if (missing) |
68db31cc SV |
1342 | lock->force_write = 1; |
1343 | if ((flags & REF_NODEREF) && (type & REF_ISSYMREF)) | |
1344 | lock->force_write = 1; | |
4bd18c43 | 1345 | |
5cc3cef9 JH |
1346 | if (safe_create_leading_directories(ref_file)) { |
1347 | last_errno = errno; | |
1348 | error("unable to create directory for %s", ref_file); | |
1349 | goto error_return; | |
1350 | } | |
4bd18c43 | 1351 | |
acd3b9ec | 1352 | lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags); |
4bd18c43 | 1353 | return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock; |
5cc3cef9 JH |
1354 | |
1355 | error_return: | |
1356 | unlock_ref(lock); | |
1357 | errno = last_errno; | |
1358 | return NULL; | |
4bd18c43 SP |
1359 | } |
1360 | ||
dfefa935 | 1361 | struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1) |
95fc7512 | 1362 | { |
53cce84c | 1363 | char refpath[PATH_MAX]; |
dfefa935 | 1364 | if (check_refname_format(refname, 0)) |
4bd18c43 | 1365 | return NULL; |
dfefa935 | 1366 | strcpy(refpath, mkpath("refs/%s", refname)); |
68db31cc | 1367 | return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL); |
4bd18c43 SP |
1368 | } |
1369 | ||
dfefa935 MH |
1370 | struct ref_lock *lock_any_ref_for_update(const char *refname, |
1371 | const unsigned char *old_sha1, int flags) | |
4bd18c43 | 1372 | { |
dfefa935 | 1373 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) |
257f3020 | 1374 | return NULL; |
dfefa935 | 1375 | return lock_ref_sha1_basic(refname, old_sha1, flags, NULL); |
c0277d15 JH |
1376 | } |
1377 | ||
d66da478 MH |
1378 | struct repack_without_ref_sb { |
1379 | const char *refname; | |
1380 | int fd; | |
1381 | }; | |
1382 | ||
1383 | static int repack_without_ref_fn(const char *refname, const unsigned char *sha1, | |
1384 | int flags, void *cb_data) | |
1385 | { | |
1386 | struct repack_without_ref_sb *data = cb_data; | |
1387 | char line[PATH_MAX + 100]; | |
1388 | int len; | |
1389 | ||
1390 | if (!strcmp(data->refname, refname)) | |
1391 | return 0; | |
1392 | len = snprintf(line, sizeof(line), "%s %s\n", | |
1393 | sha1_to_hex(sha1), refname); | |
1394 | /* this should not happen but just being defensive */ | |
1395 | if (len > sizeof(line)) | |
1396 | die("too long a refname '%s'", refname); | |
1397 | write_or_die(data->fd, line, len); | |
1398 | return 0; | |
1399 | } | |
1400 | ||
26a063a1 JH |
1401 | static struct lock_file packlock; |
1402 | ||
c0277d15 JH |
1403 | static int repack_without_ref(const char *refname) |
1404 | { | |
d66da478 | 1405 | struct repack_without_ref_sb data; |
d3177275 MH |
1406 | struct ref_dir *packed = get_packed_refs(get_ref_cache(NULL)); |
1407 | sort_ref_dir(packed); | |
1408 | if (search_ref_dir(packed, refname) == NULL) | |
c0277d15 | 1409 | return 0; |
d66da478 MH |
1410 | data.refname = refname; |
1411 | data.fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0); | |
1412 | if (data.fd < 0) { | |
1b018fd9 | 1413 | unable_to_lock_error(git_path("packed-refs"), errno); |
c0277d15 | 1414 | return error("cannot delete '%s' from packed refs", refname); |
1b018fd9 | 1415 | } |
d3177275 | 1416 | do_for_each_ref_in_dir(packed, 0, "", repack_without_ref_fn, 0, 0, &data); |
c0277d15 JH |
1417 | return commit_lock_file(&packlock); |
1418 | } | |
1419 | ||
eca35a25 | 1420 | int delete_ref(const char *refname, const unsigned char *sha1, int delopt) |
c0277d15 JH |
1421 | { |
1422 | struct ref_lock *lock; | |
eca35a25 | 1423 | int err, i = 0, ret = 0, flag = 0; |
c0277d15 | 1424 | |
68db31cc | 1425 | lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); |
c0277d15 JH |
1426 | if (!lock) |
1427 | return 1; | |
045a476f | 1428 | if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { |
c0277d15 | 1429 | /* loose */ |
eca35a25 MV |
1430 | const char *path; |
1431 | ||
1432 | if (!(delopt & REF_NODEREF)) { | |
1433 | i = strlen(lock->lk->filename) - 5; /* .lock */ | |
1434 | lock->lk->filename[i] = 0; | |
1435 | path = lock->lk->filename; | |
1436 | } else { | |
9db56f71 | 1437 | path = git_path("%s", refname); |
eca35a25 | 1438 | } |
691f1a28 AR |
1439 | err = unlink_or_warn(path); |
1440 | if (err && errno != ENOENT) | |
c0277d15 | 1441 | ret = 1; |
691f1a28 | 1442 | |
eca35a25 MV |
1443 | if (!(delopt & REF_NODEREF)) |
1444 | lock->lk->filename[i] = '.'; | |
c0277d15 JH |
1445 | } |
1446 | /* removing the loose one could have resurrected an earlier | |
1447 | * packed one. Also, if it was not loose we need to repack | |
1448 | * without it. | |
1449 | */ | |
1450 | ret |= repack_without_ref(refname); | |
1451 | ||
691f1a28 | 1452 | unlink_or_warn(git_path("logs/%s", lock->ref_name)); |
3870a0d1 | 1453 | invalidate_ref_cache(NULL); |
c0277d15 JH |
1454 | unlock_ref(lock); |
1455 | return ret; | |
4bd18c43 SP |
1456 | } |
1457 | ||
765c2258 PH |
1458 | /* |
1459 | * People using contrib's git-new-workdir have .git/logs/refs -> | |
1460 | * /some/other/path/.git/logs/refs, and that may live on another device. | |
1461 | * | |
1462 | * IOW, to avoid cross device rename errors, the temporary renamed log must | |
1463 | * live into logs/refs. | |
1464 | */ | |
1465 | #define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log" | |
1466 | ||
dfefa935 | 1467 | int rename_ref(const char *oldrefname, const char *newrefname, const char *logmsg) |
c976d415 | 1468 | { |
c976d415 LH |
1469 | unsigned char sha1[20], orig_sha1[20]; |
1470 | int flag = 0, logmoved = 0; | |
1471 | struct ref_lock *lock; | |
c976d415 | 1472 | struct stat loginfo; |
dfefa935 | 1473 | int log = !lstat(git_path("logs/%s", oldrefname), &loginfo); |
eca35a25 | 1474 | const char *symref = NULL; |
316b097a | 1475 | struct ref_cache *refs = get_ref_cache(NULL); |
c976d415 | 1476 | |
450d4c0f | 1477 | if (log && S_ISLNK(loginfo.st_mode)) |
dfefa935 | 1478 | return error("reflog for %s is a symlink", oldrefname); |
c976d415 | 1479 | |
8d68493f | 1480 | symref = resolve_ref_unsafe(oldrefname, orig_sha1, 1, &flag); |
eca35a25 | 1481 | if (flag & REF_ISSYMREF) |
fa58186c | 1482 | return error("refname %s is a symbolic ref, renaming it is not supported", |
dfefa935 | 1483 | oldrefname); |
eca35a25 | 1484 | if (!symref) |
dfefa935 | 1485 | return error("refname %s not found", oldrefname); |
c976d415 | 1486 | |
316b097a | 1487 | if (!is_refname_available(newrefname, oldrefname, get_packed_refs(refs))) |
c976d415 LH |
1488 | return 1; |
1489 | ||
316b097a | 1490 | if (!is_refname_available(newrefname, oldrefname, get_loose_refs(refs))) |
c976d415 LH |
1491 | return 1; |
1492 | ||
dfefa935 | 1493 | if (log && rename(git_path("logs/%s", oldrefname), git_path(TMP_RENAMED_LOG))) |
765c2258 | 1494 | return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s", |
dfefa935 | 1495 | oldrefname, strerror(errno)); |
c976d415 | 1496 | |
dfefa935 MH |
1497 | if (delete_ref(oldrefname, orig_sha1, REF_NODEREF)) { |
1498 | error("unable to delete old %s", oldrefname); | |
c976d415 LH |
1499 | goto rollback; |
1500 | } | |
1501 | ||
dfefa935 MH |
1502 | if (!read_ref_full(newrefname, sha1, 1, &flag) && |
1503 | delete_ref(newrefname, sha1, REF_NODEREF)) { | |
c976d415 | 1504 | if (errno==EISDIR) { |
dfefa935 MH |
1505 | if (remove_empty_directories(git_path("%s", newrefname))) { |
1506 | error("Directory not empty: %s", newrefname); | |
c976d415 LH |
1507 | goto rollback; |
1508 | } | |
1509 | } else { | |
dfefa935 | 1510 | error("unable to delete existing %s", newrefname); |
c976d415 LH |
1511 | goto rollback; |
1512 | } | |
1513 | } | |
1514 | ||
dfefa935 MH |
1515 | if (log && safe_create_leading_directories(git_path("logs/%s", newrefname))) { |
1516 | error("unable to create directory for %s", newrefname); | |
c976d415 LH |
1517 | goto rollback; |
1518 | } | |
1519 | ||
1520 | retry: | |
dfefa935 | 1521 | if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newrefname))) { |
d9e74d57 JR |
1522 | if (errno==EISDIR || errno==ENOTDIR) { |
1523 | /* | |
1524 | * rename(a, b) when b is an existing | |
1525 | * directory ought to result in ISDIR, but | |
1526 | * Solaris 5.8 gives ENOTDIR. Sheesh. | |
1527 | */ | |
dfefa935 MH |
1528 | if (remove_empty_directories(git_path("logs/%s", newrefname))) { |
1529 | error("Directory not empty: logs/%s", newrefname); | |
c976d415 LH |
1530 | goto rollback; |
1531 | } | |
1532 | goto retry; | |
1533 | } else { | |
765c2258 | 1534 | error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s", |
dfefa935 | 1535 | newrefname, strerror(errno)); |
c976d415 LH |
1536 | goto rollback; |
1537 | } | |
1538 | } | |
1539 | logmoved = log; | |
1540 | ||
dfefa935 | 1541 | lock = lock_ref_sha1_basic(newrefname, NULL, 0, NULL); |
c976d415 | 1542 | if (!lock) { |
dfefa935 | 1543 | error("unable to lock %s for update", newrefname); |
c976d415 LH |
1544 | goto rollback; |
1545 | } | |
c976d415 LH |
1546 | lock->force_write = 1; |
1547 | hashcpy(lock->old_sha1, orig_sha1); | |
678d0f4c | 1548 | if (write_ref_sha1(lock, orig_sha1, logmsg)) { |
dfefa935 | 1549 | error("unable to write current sha1 into %s", newrefname); |
c976d415 LH |
1550 | goto rollback; |
1551 | } | |
1552 | ||
1553 | return 0; | |
1554 | ||
1555 | rollback: | |
dfefa935 | 1556 | lock = lock_ref_sha1_basic(oldrefname, NULL, 0, NULL); |
c976d415 | 1557 | if (!lock) { |
dfefa935 | 1558 | error("unable to lock %s for rollback", oldrefname); |
c976d415 LH |
1559 | goto rollbacklog; |
1560 | } | |
1561 | ||
1562 | lock->force_write = 1; | |
1563 | flag = log_all_ref_updates; | |
1564 | log_all_ref_updates = 0; | |
1565 | if (write_ref_sha1(lock, orig_sha1, NULL)) | |
dfefa935 | 1566 | error("unable to write current sha1 into %s", oldrefname); |
c976d415 LH |
1567 | log_all_ref_updates = flag; |
1568 | ||
1569 | rollbacklog: | |
dfefa935 | 1570 | if (logmoved && rename(git_path("logs/%s", newrefname), git_path("logs/%s", oldrefname))) |
c976d415 | 1571 | error("unable to restore logfile %s from %s: %s", |
dfefa935 | 1572 | oldrefname, newrefname, strerror(errno)); |
c976d415 | 1573 | if (!logmoved && log && |
dfefa935 | 1574 | rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldrefname))) |
765c2258 | 1575 | error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s", |
dfefa935 | 1576 | oldrefname, strerror(errno)); |
c976d415 LH |
1577 | |
1578 | return 1; | |
1579 | } | |
1580 | ||
435fc852 | 1581 | int close_ref(struct ref_lock *lock) |
b531394d BC |
1582 | { |
1583 | if (close_lock_file(lock->lk)) | |
1584 | return -1; | |
1585 | lock->lock_fd = -1; | |
1586 | return 0; | |
1587 | } | |
1588 | ||
435fc852 | 1589 | int commit_ref(struct ref_lock *lock) |
b531394d BC |
1590 | { |
1591 | if (commit_lock_file(lock->lk)) | |
1592 | return -1; | |
1593 | lock->lock_fd = -1; | |
1594 | return 0; | |
1595 | } | |
1596 | ||
e5f38ec3 | 1597 | void unlock_ref(struct ref_lock *lock) |
4bd18c43 | 1598 | { |
4ed7cd3a BC |
1599 | /* Do not free lock->lk -- atexit() still looks at them */ |
1600 | if (lock->lk) | |
1601 | rollback_lock_file(lock->lk); | |
434cd0cd | 1602 | free(lock->ref_name); |
1655707c | 1603 | free(lock->orig_ref_name); |
4bd18c43 SP |
1604 | free(lock); |
1605 | } | |
1606 | ||
0ec29a47 JH |
1607 | /* |
1608 | * copy the reflog message msg to buf, which has been allocated sufficiently | |
1609 | * large, while cleaning up the whitespaces. Especially, convert LF to space, | |
1610 | * because reflog file is one line per entry. | |
1611 | */ | |
1612 | static int copy_msg(char *buf, const char *msg) | |
1613 | { | |
1614 | char *cp = buf; | |
1615 | char c; | |
1616 | int wasspace = 1; | |
1617 | ||
1618 | *cp++ = '\t'; | |
1619 | while ((c = *msg++)) { | |
1620 | if (wasspace && isspace(c)) | |
1621 | continue; | |
1622 | wasspace = isspace(c); | |
1623 | if (wasspace) | |
1624 | c = ' '; | |
1625 | *cp++ = c; | |
1626 | } | |
1627 | while (buf < cp && isspace(cp[-1])) | |
1628 | cp--; | |
1629 | *cp++ = '\n'; | |
1630 | return cp - buf; | |
1631 | } | |
1632 | ||
dfefa935 | 1633 | int log_ref_setup(const char *refname, char *logfile, int bufsize) |
6de08ae6 | 1634 | { |
859c3017 | 1635 | int logfd, oflags = O_APPEND | O_WRONLY; |
9a13f0b7 | 1636 | |
dfefa935 | 1637 | git_snpath(logfile, bufsize, "logs/%s", refname); |
4057deb5 | 1638 | if (log_all_ref_updates && |
dfefa935 MH |
1639 | (!prefixcmp(refname, "refs/heads/") || |
1640 | !prefixcmp(refname, "refs/remotes/") || | |
1641 | !prefixcmp(refname, "refs/notes/") || | |
1642 | !strcmp(refname, "HEAD"))) { | |
157aaea5 | 1643 | if (safe_create_leading_directories(logfile) < 0) |
6de08ae6 | 1644 | return error("unable to create directory for %s", |
157aaea5 | 1645 | logfile); |
6de08ae6 SP |
1646 | oflags |= O_CREAT; |
1647 | } | |
1648 | ||
157aaea5 | 1649 | logfd = open(logfile, oflags, 0666); |
6de08ae6 | 1650 | if (logfd < 0) { |
1974bf62 | 1651 | if (!(oflags & O_CREAT) && errno == ENOENT) |
6de08ae6 | 1652 | return 0; |
3b463c3f JH |
1653 | |
1654 | if ((oflags & O_CREAT) && errno == EISDIR) { | |
157aaea5 | 1655 | if (remove_empty_directories(logfile)) { |
3b463c3f | 1656 | return error("There are still logs under '%s'", |
157aaea5 | 1657 | logfile); |
3b463c3f | 1658 | } |
157aaea5 | 1659 | logfd = open(logfile, oflags, 0666); |
3b463c3f JH |
1660 | } |
1661 | ||
1662 | if (logfd < 0) | |
1663 | return error("Unable to append to %s: %s", | |
157aaea5 | 1664 | logfile, strerror(errno)); |
6de08ae6 SP |
1665 | } |
1666 | ||
157aaea5 | 1667 | adjust_shared_perm(logfile); |
859c3017 EM |
1668 | close(logfd); |
1669 | return 0; | |
1670 | } | |
443b92b6 | 1671 | |
dfefa935 | 1672 | static int log_ref_write(const char *refname, const unsigned char *old_sha1, |
859c3017 EM |
1673 | const unsigned char *new_sha1, const char *msg) |
1674 | { | |
1675 | int logfd, result, written, oflags = O_APPEND | O_WRONLY; | |
1676 | unsigned maxlen, len; | |
1677 | int msglen; | |
157aaea5 | 1678 | char log_file[PATH_MAX]; |
859c3017 EM |
1679 | char *logrec; |
1680 | const char *committer; | |
1681 | ||
1682 | if (log_all_ref_updates < 0) | |
1683 | log_all_ref_updates = !is_bare_repository(); | |
1684 | ||
dfefa935 | 1685 | result = log_ref_setup(refname, log_file, sizeof(log_file)); |
859c3017 EM |
1686 | if (result) |
1687 | return result; | |
1688 | ||
1689 | logfd = open(log_file, oflags); | |
1690 | if (logfd < 0) | |
1691 | return 0; | |
0ec29a47 | 1692 | msglen = msg ? strlen(msg) : 0; |
774751a8 | 1693 | committer = git_committer_info(0); |
8ac65937 JH |
1694 | maxlen = strlen(committer) + msglen + 100; |
1695 | logrec = xmalloc(maxlen); | |
1696 | len = sprintf(logrec, "%s %s %s\n", | |
9a13f0b7 NP |
1697 | sha1_to_hex(old_sha1), |
1698 | sha1_to_hex(new_sha1), | |
8ac65937 JH |
1699 | committer); |
1700 | if (msglen) | |
0ec29a47 | 1701 | len += copy_msg(logrec + len - 1, msg) - 1; |
93822c22 | 1702 | written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1; |
6de08ae6 | 1703 | free(logrec); |
91c8d590 | 1704 | if (close(logfd) != 0 || written != len) |
9a13f0b7 | 1705 | return error("Unable to append to %s", log_file); |
6de08ae6 SP |
1706 | return 0; |
1707 | } | |
1708 | ||
c3b0dec5 LT |
1709 | static int is_branch(const char *refname) |
1710 | { | |
1711 | return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"); | |
1712 | } | |
1713 | ||
4bd18c43 SP |
1714 | int write_ref_sha1(struct ref_lock *lock, |
1715 | const unsigned char *sha1, const char *logmsg) | |
1716 | { | |
1717 | static char term = '\n'; | |
c3b0dec5 | 1718 | struct object *o; |
4bd18c43 SP |
1719 | |
1720 | if (!lock) | |
95fc7512 | 1721 | return -1; |
a89fccd2 | 1722 | if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) { |
4bd18c43 SP |
1723 | unlock_ref(lock); |
1724 | return 0; | |
95fc7512 | 1725 | } |
c3b0dec5 LT |
1726 | o = parse_object(sha1); |
1727 | if (!o) { | |
7be8b3ba | 1728 | error("Trying to write ref %s with nonexistent object %s", |
c3b0dec5 LT |
1729 | lock->ref_name, sha1_to_hex(sha1)); |
1730 | unlock_ref(lock); | |
1731 | return -1; | |
1732 | } | |
1733 | if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) { | |
1734 | error("Trying to write non-commit object %s to branch %s", | |
1735 | sha1_to_hex(sha1), lock->ref_name); | |
1736 | unlock_ref(lock); | |
1737 | return -1; | |
1738 | } | |
93822c22 AW |
1739 | if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 || |
1740 | write_in_full(lock->lock_fd, &term, 1) != 1 | |
b531394d | 1741 | || close_ref(lock) < 0) { |
c33d5174 | 1742 | error("Couldn't write %s", lock->lk->filename); |
4bd18c43 SP |
1743 | unlock_ref(lock); |
1744 | return -1; | |
1745 | } | |
8bf90dc9 | 1746 | clear_loose_ref_cache(get_ref_cache(NULL)); |
bd104db1 NP |
1747 | if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 || |
1748 | (strcmp(lock->ref_name, lock->orig_ref_name) && | |
1749 | log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) { | |
6de08ae6 SP |
1750 | unlock_ref(lock); |
1751 | return -1; | |
1752 | } | |
605fac8b NP |
1753 | if (strcmp(lock->orig_ref_name, "HEAD") != 0) { |
1754 | /* | |
1755 | * Special hack: If a branch is updated directly and HEAD | |
1756 | * points to it (may happen on the remote side of a push | |
1757 | * for example) then logically the HEAD reflog should be | |
1758 | * updated too. | |
1759 | * A generic solution implies reverse symref information, | |
1760 | * but finding all symrefs pointing to the given branch | |
1761 | * would be rather costly for this rare event (the direct | |
1762 | * update of a branch) to be worth it. So let's cheat and | |
1763 | * check with HEAD only which should cover 99% of all usage | |
1764 | * scenarios (even 100% of the default ones). | |
1765 | */ | |
1766 | unsigned char head_sha1[20]; | |
1767 | int head_flag; | |
1768 | const char *head_ref; | |
8cad4744 | 1769 | head_ref = resolve_ref_unsafe("HEAD", head_sha1, 1, &head_flag); |
605fac8b NP |
1770 | if (head_ref && (head_flag & REF_ISSYMREF) && |
1771 | !strcmp(head_ref, lock->ref_name)) | |
1772 | log_ref_write("HEAD", lock->old_sha1, sha1, logmsg); | |
1773 | } | |
b531394d | 1774 | if (commit_ref(lock)) { |
434cd0cd | 1775 | error("Couldn't set %s", lock->ref_name); |
4bd18c43 SP |
1776 | unlock_ref(lock); |
1777 | return -1; | |
1778 | } | |
4bd18c43 SP |
1779 | unlock_ref(lock); |
1780 | return 0; | |
95fc7512 | 1781 | } |
d556fae2 | 1782 | |
8b5157e4 NP |
1783 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1784 | const char *logmsg) | |
41b625b0 NP |
1785 | { |
1786 | const char *lockpath; | |
1787 | char ref[1000]; | |
1788 | int fd, len, written; | |
a4f34cbb | 1789 | char *git_HEAD = git_pathdup("%s", ref_target); |
8b5157e4 NP |
1790 | unsigned char old_sha1[20], new_sha1[20]; |
1791 | ||
1792 | if (logmsg && read_ref(ref_target, old_sha1)) | |
1793 | hashclr(old_sha1); | |
41b625b0 | 1794 | |
d48744d1 JH |
1795 | if (safe_create_leading_directories(git_HEAD) < 0) |
1796 | return error("unable to create directory for %s", git_HEAD); | |
1797 | ||
41b625b0 NP |
1798 | #ifndef NO_SYMLINK_HEAD |
1799 | if (prefer_symlink_refs) { | |
1800 | unlink(git_HEAD); | |
1801 | if (!symlink(refs_heads_master, git_HEAD)) | |
8b5157e4 | 1802 | goto done; |
41b625b0 NP |
1803 | fprintf(stderr, "no symlink - falling back to symbolic ref\n"); |
1804 | } | |
1805 | #endif | |
1806 | ||
1807 | len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master); | |
1808 | if (sizeof(ref) <= len) { | |
1809 | error("refname too long: %s", refs_heads_master); | |
47fc52e2 | 1810 | goto error_free_return; |
41b625b0 NP |
1811 | } |
1812 | lockpath = mkpath("%s.lock", git_HEAD); | |
1813 | fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1814 | if (fd < 0) { | |
1815 | error("Unable to open %s for writing", lockpath); | |
47fc52e2 | 1816 | goto error_free_return; |
41b625b0 NP |
1817 | } |
1818 | written = write_in_full(fd, ref, len); | |
91c8d590 | 1819 | if (close(fd) != 0 || written != len) { |
41b625b0 | 1820 | error("Unable to write to %s", lockpath); |
47fc52e2 | 1821 | goto error_unlink_return; |
41b625b0 NP |
1822 | } |
1823 | if (rename(lockpath, git_HEAD) < 0) { | |
41b625b0 | 1824 | error("Unable to create %s", git_HEAD); |
47fc52e2 | 1825 | goto error_unlink_return; |
41b625b0 NP |
1826 | } |
1827 | if (adjust_shared_perm(git_HEAD)) { | |
41b625b0 | 1828 | error("Unable to fix permissions on %s", lockpath); |
47fc52e2 | 1829 | error_unlink_return: |
691f1a28 | 1830 | unlink_or_warn(lockpath); |
47fc52e2 JH |
1831 | error_free_return: |
1832 | free(git_HEAD); | |
1833 | return -1; | |
41b625b0 | 1834 | } |
8b5157e4 | 1835 | |
ee96d11b | 1836 | #ifndef NO_SYMLINK_HEAD |
8b5157e4 | 1837 | done: |
ee96d11b | 1838 | #endif |
8b5157e4 NP |
1839 | if (logmsg && !read_ref(refs_heads_master, new_sha1)) |
1840 | log_ref_write(ref_target, old_sha1, new_sha1, logmsg); | |
1841 | ||
47fc52e2 | 1842 | free(git_HEAD); |
41b625b0 NP |
1843 | return 0; |
1844 | } | |
1845 | ||
16d7cc90 JH |
1846 | static char *ref_msg(const char *line, const char *endp) |
1847 | { | |
1848 | const char *ep; | |
16d7cc90 | 1849 | line += 82; |
182af834 PH |
1850 | ep = memchr(line, '\n', endp - line); |
1851 | if (!ep) | |
1852 | ep = endp; | |
1853 | return xmemdupz(line, ep - line); | |
16d7cc90 JH |
1854 | } |
1855 | ||
dfefa935 MH |
1856 | int read_ref_at(const char *refname, unsigned long at_time, int cnt, |
1857 | unsigned char *sha1, char **msg, | |
1858 | unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
d556fae2 | 1859 | { |
e5229042 | 1860 | const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec; |
d556fae2 | 1861 | char *tz_c; |
e29cb53a | 1862 | int logfd, tz, reccnt = 0; |
d556fae2 SP |
1863 | struct stat st; |
1864 | unsigned long date; | |
e5229042 | 1865 | unsigned char logged_sha1[20]; |
cb48cb58 | 1866 | void *log_mapped; |
dc49cd76 | 1867 | size_t mapsz; |
d556fae2 | 1868 | |
dfefa935 | 1869 | logfile = git_path("logs/%s", refname); |
d556fae2 SP |
1870 | logfd = open(logfile, O_RDONLY, 0); |
1871 | if (logfd < 0) | |
d824cbba | 1872 | die_errno("Unable to read log '%s'", logfile); |
d556fae2 SP |
1873 | fstat(logfd, &st); |
1874 | if (!st.st_size) | |
1875 | die("Log %s is empty.", logfile); | |
dc49cd76 SP |
1876 | mapsz = xsize_t(st.st_size); |
1877 | log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0); | |
cb48cb58 | 1878 | logdata = log_mapped; |
d556fae2 SP |
1879 | close(logfd); |
1880 | ||
e5229042 | 1881 | lastrec = NULL; |
d556fae2 SP |
1882 | rec = logend = logdata + st.st_size; |
1883 | while (logdata < rec) { | |
e29cb53a | 1884 | reccnt++; |
d556fae2 SP |
1885 | if (logdata < rec && *(rec-1) == '\n') |
1886 | rec--; | |
e5229042 SP |
1887 | lastgt = NULL; |
1888 | while (logdata < rec && *(rec-1) != '\n') { | |
d556fae2 | 1889 | rec--; |
e5229042 SP |
1890 | if (*rec == '>') |
1891 | lastgt = rec; | |
1892 | } | |
1893 | if (!lastgt) | |
d556fae2 | 1894 | die("Log %s is corrupt.", logfile); |
e5229042 | 1895 | date = strtoul(lastgt + 1, &tz_c, 10); |
ab2a1a32 | 1896 | if (date <= at_time || cnt == 0) { |
76a44c5c | 1897 | tz = strtoul(tz_c, NULL, 10); |
16d7cc90 JH |
1898 | if (msg) |
1899 | *msg = ref_msg(rec, logend); | |
1900 | if (cutoff_time) | |
1901 | *cutoff_time = date; | |
1902 | if (cutoff_tz) | |
1903 | *cutoff_tz = tz; | |
1904 | if (cutoff_cnt) | |
76a44c5c | 1905 | *cutoff_cnt = reccnt - 1; |
e5229042 SP |
1906 | if (lastrec) { |
1907 | if (get_sha1_hex(lastrec, logged_sha1)) | |
1908 | die("Log %s is corrupt.", logfile); | |
1909 | if (get_sha1_hex(rec + 41, sha1)) | |
1910 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1911 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1912 | warning("Log %s has gap after %s.", |
73013afd | 1913 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 | 1914 | } |
e5f38ec3 JH |
1915 | } |
1916 | else if (date == at_time) { | |
e5229042 SP |
1917 | if (get_sha1_hex(rec + 41, sha1)) |
1918 | die("Log %s is corrupt.", logfile); | |
e5f38ec3 JH |
1919 | } |
1920 | else { | |
e5229042 SP |
1921 | if (get_sha1_hex(rec + 41, logged_sha1)) |
1922 | die("Log %s is corrupt.", logfile); | |
a89fccd2 | 1923 | if (hashcmp(logged_sha1, sha1)) { |
edbc25c5 | 1924 | warning("Log %s unexpectedly ended on %s.", |
73013afd | 1925 | logfile, show_date(date, tz, DATE_RFC2822)); |
e5229042 SP |
1926 | } |
1927 | } | |
dc49cd76 | 1928 | munmap(log_mapped, mapsz); |
d556fae2 SP |
1929 | return 0; |
1930 | } | |
e5229042 | 1931 | lastrec = rec; |
ab2a1a32 JH |
1932 | if (cnt > 0) |
1933 | cnt--; | |
d556fae2 SP |
1934 | } |
1935 | ||
e5229042 SP |
1936 | rec = logdata; |
1937 | while (rec < logend && *rec != '>' && *rec != '\n') | |
1938 | rec++; | |
1939 | if (rec == logend || *rec == '\n') | |
d556fae2 | 1940 | die("Log %s is corrupt.", logfile); |
e5229042 | 1941 | date = strtoul(rec + 1, &tz_c, 10); |
d556fae2 SP |
1942 | tz = strtoul(tz_c, NULL, 10); |
1943 | if (get_sha1_hex(logdata, sha1)) | |
1944 | die("Log %s is corrupt.", logfile); | |
d1a4489a JK |
1945 | if (is_null_sha1(sha1)) { |
1946 | if (get_sha1_hex(logdata + 41, sha1)) | |
1947 | die("Log %s is corrupt.", logfile); | |
1948 | } | |
16d7cc90 JH |
1949 | if (msg) |
1950 | *msg = ref_msg(logdata, logend); | |
dc49cd76 | 1951 | munmap(log_mapped, mapsz); |
16d7cc90 JH |
1952 | |
1953 | if (cutoff_time) | |
1954 | *cutoff_time = date; | |
1955 | if (cutoff_tz) | |
1956 | *cutoff_tz = tz; | |
1957 | if (cutoff_cnt) | |
1958 | *cutoff_cnt = reccnt; | |
1959 | return 1; | |
d556fae2 | 1960 | } |
2ff81662 | 1961 | |
dfefa935 | 1962 | int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long ofs, void *cb_data) |
2ff81662 JH |
1963 | { |
1964 | const char *logfile; | |
1965 | FILE *logfp; | |
8ca78803 | 1966 | struct strbuf sb = STRBUF_INIT; |
2266bf27 | 1967 | int ret = 0; |
2ff81662 | 1968 | |
dfefa935 | 1969 | logfile = git_path("logs/%s", refname); |
2ff81662 JH |
1970 | logfp = fopen(logfile, "r"); |
1971 | if (!logfp) | |
883d60fa | 1972 | return -1; |
101d15e0 JH |
1973 | |
1974 | if (ofs) { | |
1975 | struct stat statbuf; | |
1976 | if (fstat(fileno(logfp), &statbuf) || | |
1977 | statbuf.st_size < ofs || | |
1978 | fseek(logfp, -ofs, SEEK_END) || | |
8ca78803 | 1979 | strbuf_getwholeline(&sb, logfp, '\n')) { |
9d33f7c2 | 1980 | fclose(logfp); |
8ca78803 | 1981 | strbuf_release(&sb); |
101d15e0 | 1982 | return -1; |
9d33f7c2 | 1983 | } |
101d15e0 JH |
1984 | } |
1985 | ||
8ca78803 | 1986 | while (!strbuf_getwholeline(&sb, logfp, '\n')) { |
2ff81662 | 1987 | unsigned char osha1[20], nsha1[20]; |
883d60fa JS |
1988 | char *email_end, *message; |
1989 | unsigned long timestamp; | |
8ca78803 | 1990 | int tz; |
2ff81662 JH |
1991 | |
1992 | /* old SP new SP name <email> SP time TAB msg LF */ | |
8ca78803 RS |
1993 | if (sb.len < 83 || sb.buf[sb.len - 1] != '\n' || |
1994 | get_sha1_hex(sb.buf, osha1) || sb.buf[40] != ' ' || | |
1995 | get_sha1_hex(sb.buf + 41, nsha1) || sb.buf[81] != ' ' || | |
1996 | !(email_end = strchr(sb.buf + 82, '>')) || | |
883d60fa JS |
1997 | email_end[1] != ' ' || |
1998 | !(timestamp = strtoul(email_end + 2, &message, 10)) || | |
1999 | !message || message[0] != ' ' || | |
2000 | (message[1] != '+' && message[1] != '-') || | |
2001 | !isdigit(message[2]) || !isdigit(message[3]) || | |
b4dd4856 | 2002 | !isdigit(message[4]) || !isdigit(message[5])) |
2ff81662 | 2003 | continue; /* corrupt? */ |
883d60fa JS |
2004 | email_end[1] = '\0'; |
2005 | tz = strtol(message + 1, NULL, 10); | |
b4dd4856 JS |
2006 | if (message[6] != '\t') |
2007 | message += 6; | |
2008 | else | |
2009 | message += 7; | |
8ca78803 RS |
2010 | ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message, |
2011 | cb_data); | |
883d60fa | 2012 | if (ret) |
2266bf27 | 2013 | break; |
2ff81662 JH |
2014 | } |
2015 | fclose(logfp); | |
8ca78803 | 2016 | strbuf_release(&sb); |
2266bf27 | 2017 | return ret; |
2ff81662 | 2018 | } |
e29cb53a | 2019 | |
dfefa935 | 2020 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data) |
101d15e0 | 2021 | { |
dfefa935 | 2022 | return for_each_recent_reflog_ent(refname, fn, 0, cb_data); |
101d15e0 JH |
2023 | } |
2024 | ||
eb8381c8 NP |
2025 | static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data) |
2026 | { | |
d3177275 | 2027 | DIR *d = opendir(git_path("logs/%s", base)); |
fcee5a14 | 2028 | int retval = 0; |
eb8381c8 | 2029 | |
d3177275 | 2030 | if (d) { |
eb8381c8 NP |
2031 | struct dirent *de; |
2032 | int baselen = strlen(base); | |
2033 | char *log = xmalloc(baselen + 257); | |
2034 | ||
2035 | memcpy(log, base, baselen); | |
2036 | if (baselen && base[baselen-1] != '/') | |
2037 | log[baselen++] = '/'; | |
2038 | ||
d3177275 | 2039 | while ((de = readdir(d)) != NULL) { |
eb8381c8 NP |
2040 | struct stat st; |
2041 | int namelen; | |
2042 | ||
2043 | if (de->d_name[0] == '.') | |
2044 | continue; | |
2045 | namelen = strlen(de->d_name); | |
2046 | if (namelen > 255) | |
2047 | continue; | |
2048 | if (has_extension(de->d_name, ".lock")) | |
2049 | continue; | |
2050 | memcpy(log + baselen, de->d_name, namelen+1); | |
2051 | if (stat(git_path("logs/%s", log), &st) < 0) | |
2052 | continue; | |
2053 | if (S_ISDIR(st.st_mode)) { | |
2054 | retval = do_for_each_reflog(log, fn, cb_data); | |
2055 | } else { | |
2056 | unsigned char sha1[20]; | |
c6893323 | 2057 | if (read_ref_full(log, sha1, 0, NULL)) |
eb8381c8 NP |
2058 | retval = error("bad ref for %s", log); |
2059 | else | |
2060 | retval = fn(log, sha1, 0, cb_data); | |
2061 | } | |
2062 | if (retval) | |
2063 | break; | |
2064 | } | |
2065 | free(log); | |
d3177275 | 2066 | closedir(d); |
eb8381c8 | 2067 | } |
acb39f64 | 2068 | else if (*base) |
fcee5a14 | 2069 | return errno; |
eb8381c8 NP |
2070 | return retval; |
2071 | } | |
2072 | ||
2073 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
2074 | { | |
2075 | return do_for_each_reflog("", fn, cb_data); | |
2076 | } | |
3d9f037c CR |
2077 | |
2078 | int update_ref(const char *action, const char *refname, | |
2079 | const unsigned char *sha1, const unsigned char *oldval, | |
2080 | int flags, enum action_on_err onerr) | |
2081 | { | |
2082 | static struct ref_lock *lock; | |
2083 | lock = lock_any_ref_for_update(refname, oldval, flags); | |
2084 | if (!lock) { | |
2085 | const char *str = "Cannot lock the ref '%s'."; | |
2086 | switch (onerr) { | |
2087 | case MSG_ON_ERR: error(str, refname); break; | |
2088 | case DIE_ON_ERR: die(str, refname); break; | |
2089 | case QUIET_ON_ERR: break; | |
2090 | } | |
2091 | return 1; | |
2092 | } | |
2093 | if (write_ref_sha1(lock, sha1, action) < 0) { | |
2094 | const char *str = "Cannot update the ref '%s'."; | |
2095 | switch (onerr) { | |
2096 | case MSG_ON_ERR: error(str, refname); break; | |
2097 | case DIE_ON_ERR: die(str, refname); break; | |
2098 | case QUIET_ON_ERR: break; | |
2099 | } | |
2100 | return 1; | |
2101 | } | |
2102 | return 0; | |
2103 | } | |
cda69f48 | 2104 | |
5483f799 | 2105 | struct ref *find_ref_by_name(const struct ref *list, const char *name) |
cda69f48 JK |
2106 | { |
2107 | for ( ; list; list = list->next) | |
2108 | if (!strcmp(list->name, name)) | |
5483f799 | 2109 | return (struct ref *)list; |
cda69f48 JK |
2110 | return NULL; |
2111 | } | |
7c2b3029 JK |
2112 | |
2113 | /* | |
2114 | * generate a format suitable for scanf from a ref_rev_parse_rules | |
2115 | * rule, that is replace the "%.*s" spec with a "%s" spec | |
2116 | */ | |
2117 | static void gen_scanf_fmt(char *scanf_fmt, const char *rule) | |
2118 | { | |
2119 | char *spec; | |
2120 | ||
2121 | spec = strstr(rule, "%.*s"); | |
2122 | if (!spec || strstr(spec + 4, "%.*s")) | |
2123 | die("invalid rule in ref_rev_parse_rules: %s", rule); | |
2124 | ||
2125 | /* copy all until spec */ | |
2126 | strncpy(scanf_fmt, rule, spec - rule); | |
2127 | scanf_fmt[spec - rule] = '\0'; | |
2128 | /* copy new spec */ | |
2129 | strcat(scanf_fmt, "%s"); | |
2130 | /* copy remaining rule */ | |
2131 | strcat(scanf_fmt, spec + 4); | |
2132 | ||
2133 | return; | |
2134 | } | |
2135 | ||
dfefa935 | 2136 | char *shorten_unambiguous_ref(const char *refname, int strict) |
7c2b3029 JK |
2137 | { |
2138 | int i; | |
2139 | static char **scanf_fmts; | |
2140 | static int nr_rules; | |
2141 | char *short_name; | |
2142 | ||
2143 | /* pre generate scanf formats from ref_rev_parse_rules[] */ | |
2144 | if (!nr_rules) { | |
2145 | size_t total_len = 0; | |
2146 | ||
2147 | /* the rule list is NULL terminated, count them first */ | |
2148 | for (; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
2149 | /* no +1 because strlen("%s") < strlen("%.*s") */ | |
2150 | total_len += strlen(ref_rev_parse_rules[nr_rules]); | |
2151 | ||
2152 | scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); | |
2153 | ||
2154 | total_len = 0; | |
2155 | for (i = 0; i < nr_rules; i++) { | |
2156 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] | |
2157 | + total_len; | |
2158 | gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); | |
2159 | total_len += strlen(ref_rev_parse_rules[i]); | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | /* bail out if there are no rules */ | |
2164 | if (!nr_rules) | |
dfefa935 | 2165 | return xstrdup(refname); |
7c2b3029 | 2166 | |
dfefa935 MH |
2167 | /* buffer for scanf result, at most refname must fit */ |
2168 | short_name = xstrdup(refname); | |
7c2b3029 JK |
2169 | |
2170 | /* skip first rule, it will always match */ | |
2171 | for (i = nr_rules - 1; i > 0 ; --i) { | |
2172 | int j; | |
6e7b3309 | 2173 | int rules_to_fail = i; |
7c2b3029 JK |
2174 | int short_name_len; |
2175 | ||
dfefa935 | 2176 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) |
7c2b3029 JK |
2177 | continue; |
2178 | ||
2179 | short_name_len = strlen(short_name); | |
2180 | ||
6e7b3309 BW |
2181 | /* |
2182 | * in strict mode, all (except the matched one) rules | |
2183 | * must fail to resolve to a valid non-ambiguous ref | |
2184 | */ | |
2185 | if (strict) | |
2186 | rules_to_fail = nr_rules; | |
2187 | ||
7c2b3029 JK |
2188 | /* |
2189 | * check if the short name resolves to a valid ref, | |
2190 | * but use only rules prior to the matched one | |
2191 | */ | |
6e7b3309 | 2192 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 | 2193 | const char *rule = ref_rev_parse_rules[j]; |
7c2b3029 JK |
2194 | char refname[PATH_MAX]; |
2195 | ||
6e7b3309 BW |
2196 | /* skip matched rule */ |
2197 | if (i == j) | |
2198 | continue; | |
2199 | ||
7c2b3029 JK |
2200 | /* |
2201 | * the short name is ambiguous, if it resolves | |
2202 | * (with this previous rule) to a valid ref | |
2203 | * read_ref() returns 0 on success | |
2204 | */ | |
2205 | mksnpath(refname, sizeof(refname), | |
2206 | rule, short_name_len, short_name); | |
c6893323 | 2207 | if (ref_exists(refname)) |
7c2b3029 JK |
2208 | break; |
2209 | } | |
2210 | ||
2211 | /* | |
2212 | * short name is non-ambiguous if all previous rules | |
2213 | * haven't resolved to a valid ref | |
2214 | */ | |
6e7b3309 | 2215 | if (j == rules_to_fail) |
7c2b3029 JK |
2216 | return short_name; |
2217 | } | |
2218 | ||
2219 | free(short_name); | |
dfefa935 | 2220 | return xstrdup(refname); |
7c2b3029 | 2221 | } |