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1 | /* | |
2 | * Copyright (C) the libgit2 contributors. All rights reserved. | |
3 | * | |
4 | * This file is part of libgit2, distributed under the GNU GPL v2 with | |
5 | * a Linking Exception. For full terms see the included COPYING file. | |
6 | */ | |
7 | ||
8 | #include "refs.h" | |
9 | #include "hash.h" | |
10 | #include "repository.h" | |
11 | #include "futils.h" | |
12 | #include "filebuf.h" | |
13 | #include "pack.h" | |
14 | #include "parse.h" | |
15 | #include "reflog.h" | |
16 | #include "refdb.h" | |
17 | #include "iterator.h" | |
18 | #include "sortedcache.h" | |
19 | #include "signature.h" | |
20 | #include "wildmatch.h" | |
21 | #include "path.h" | |
22 | ||
23 | #include <git2/tag.h> | |
24 | #include <git2/object.h> | |
25 | #include <git2/refdb.h> | |
26 | #include <git2/branch.h> | |
27 | #include <git2/sys/refdb_backend.h> | |
28 | #include <git2/sys/refs.h> | |
29 | #include <git2/sys/reflog.h> | |
30 | ||
31 | #define DEFAULT_NESTING_LEVEL 5 | |
32 | #define MAX_NESTING_LEVEL 10 | |
33 | ||
34 | enum { | |
35 | PACKREF_HAS_PEEL = 1, | |
36 | PACKREF_WAS_LOOSE = 2, | |
37 | PACKREF_CANNOT_PEEL = 4, | |
38 | PACKREF_SHADOWED = 8 | |
39 | }; | |
40 | ||
41 | enum { | |
42 | PEELING_NONE = 0, | |
43 | PEELING_STANDARD, | |
44 | PEELING_FULL | |
45 | }; | |
46 | ||
47 | struct packref { | |
48 | git_oid oid; | |
49 | git_oid peel; | |
50 | char flags; | |
51 | char name[GIT_FLEX_ARRAY]; | |
52 | }; | |
53 | ||
54 | typedef struct refdb_fs_backend { | |
55 | git_refdb_backend parent; | |
56 | ||
57 | git_repository *repo; | |
58 | /* path to git directory */ | |
59 | char *gitpath; | |
60 | /* path to common objects' directory */ | |
61 | char *commonpath; | |
62 | ||
63 | git_sortedcache *refcache; | |
64 | int peeling_mode; | |
65 | git_iterator_flag_t iterator_flags; | |
66 | uint32_t direach_flags; | |
67 | int fsync; | |
68 | git_map packed_refs_map; | |
69 | git_mutex prlock; /* protect packed_refs_map */ | |
70 | git_futils_filestamp packed_refs_stamp; | |
71 | bool sorted; | |
72 | } refdb_fs_backend; | |
73 | ||
74 | static int refdb_reflog_fs__delete(git_refdb_backend *_backend, const char *name); | |
75 | static char *packed_set_peeling_mode(char *data, size_t data_sz, refdb_fs_backend *backend); | |
76 | ||
77 | GIT_INLINE(int) loose_path( | |
78 | git_str *out, | |
79 | const char *base, | |
80 | const char *refname) | |
81 | { | |
82 | if (git_str_joinpath(out, base, refname) < 0) | |
83 | return -1; | |
84 | ||
85 | return git_fs_path_validate_str_length_with_suffix(out, | |
86 | CONST_STRLEN(".lock")); | |
87 | } | |
88 | ||
89 | GIT_INLINE(int) reflog_path( | |
90 | git_str *out, | |
91 | git_repository *repo, | |
92 | const char *refname) | |
93 | { | |
94 | const char *base; | |
95 | int error; | |
96 | ||
97 | base = (strcmp(refname, GIT_HEAD_FILE) == 0) ? repo->gitdir : | |
98 | repo->commondir; | |
99 | ||
100 | if ((error = git_str_joinpath(out, base, GIT_REFLOG_DIR)) < 0) | |
101 | return error; | |
102 | ||
103 | return loose_path(out, out->ptr, refname); | |
104 | } | |
105 | ||
106 | static int packref_cmp(const void *a_, const void *b_) | |
107 | { | |
108 | const struct packref *a = a_, *b = b_; | |
109 | return strcmp(a->name, b->name); | |
110 | } | |
111 | ||
112 | static int packed_reload(refdb_fs_backend *backend) | |
113 | { | |
114 | int error; | |
115 | git_str packedrefs = GIT_STR_INIT; | |
116 | char *scan, *eof, *eol; | |
117 | ||
118 | if (!backend->gitpath) | |
119 | return 0; | |
120 | ||
121 | error = git_sortedcache_lockandload(backend->refcache, &packedrefs); | |
122 | ||
123 | /* | |
124 | * If we can't find the packed-refs, clear table and return. | |
125 | * Any other error just gets passed through. | |
126 | * If no error, and file wasn't changed, just return. | |
127 | * Anything else means we need to refresh the packed refs. | |
128 | */ | |
129 | if (error <= 0) { | |
130 | if (error == GIT_ENOTFOUND) { | |
131 | GIT_UNUSED(git_sortedcache_clear(backend->refcache, true)); | |
132 | git_error_clear(); | |
133 | error = 0; | |
134 | } | |
135 | return error; | |
136 | } | |
137 | ||
138 | /* At this point, refresh the packed refs from the loaded buffer. */ | |
139 | ||
140 | GIT_UNUSED(git_sortedcache_clear(backend->refcache, false)); | |
141 | ||
142 | scan = packedrefs.ptr; | |
143 | eof = scan + packedrefs.size; | |
144 | ||
145 | scan = packed_set_peeling_mode(scan, packedrefs.size, backend); | |
146 | if (!scan) | |
147 | goto parse_failed; | |
148 | ||
149 | while (scan < eof && *scan == '#') { | |
150 | if (!(eol = strchr(scan, '\n'))) | |
151 | goto parse_failed; | |
152 | scan = eol + 1; | |
153 | } | |
154 | ||
155 | while (scan < eof) { | |
156 | struct packref *ref; | |
157 | git_oid oid; | |
158 | ||
159 | /* parse "<OID> <refname>\n" */ | |
160 | ||
161 | if (git_oid_fromstr(&oid, scan) < 0) | |
162 | goto parse_failed; | |
163 | scan += GIT_OID_HEXSZ; | |
164 | ||
165 | if (*scan++ != ' ') | |
166 | goto parse_failed; | |
167 | if (!(eol = strchr(scan, '\n'))) | |
168 | goto parse_failed; | |
169 | *eol = '\0'; | |
170 | if (eol[-1] == '\r') | |
171 | eol[-1] = '\0'; | |
172 | ||
173 | if (git_sortedcache_upsert((void **)&ref, backend->refcache, scan) < 0) | |
174 | goto parse_failed; | |
175 | scan = eol + 1; | |
176 | ||
177 | git_oid_cpy(&ref->oid, &oid); | |
178 | ||
179 | /* look for optional "^<OID>\n" */ | |
180 | ||
181 | if (*scan == '^') { | |
182 | if (git_oid_fromstr(&oid, scan + 1) < 0) | |
183 | goto parse_failed; | |
184 | scan += GIT_OID_HEXSZ + 1; | |
185 | ||
186 | if (scan < eof) { | |
187 | if (!(eol = strchr(scan, '\n'))) | |
188 | goto parse_failed; | |
189 | scan = eol + 1; | |
190 | } | |
191 | ||
192 | git_oid_cpy(&ref->peel, &oid); | |
193 | ref->flags |= PACKREF_HAS_PEEL; | |
194 | } | |
195 | else if (backend->peeling_mode == PEELING_FULL || | |
196 | (backend->peeling_mode == PEELING_STANDARD && | |
197 | git__prefixcmp(ref->name, GIT_REFS_TAGS_DIR) == 0)) | |
198 | ref->flags |= PACKREF_CANNOT_PEEL; | |
199 | } | |
200 | ||
201 | git_sortedcache_wunlock(backend->refcache); | |
202 | git_str_dispose(&packedrefs); | |
203 | ||
204 | return 0; | |
205 | ||
206 | parse_failed: | |
207 | git_error_set(GIT_ERROR_REFERENCE, "corrupted packed references file"); | |
208 | ||
209 | GIT_UNUSED(git_sortedcache_clear(backend->refcache, false)); | |
210 | git_sortedcache_wunlock(backend->refcache); | |
211 | git_str_dispose(&packedrefs); | |
212 | ||
213 | return -1; | |
214 | } | |
215 | ||
216 | static int loose_parse_oid( | |
217 | git_oid *oid, const char *filename, git_str *file_content) | |
218 | { | |
219 | const char *str = git_str_cstr(file_content); | |
220 | ||
221 | if (git_str_len(file_content) < GIT_OID_HEXSZ) | |
222 | goto corrupted; | |
223 | ||
224 | /* we need to get 40 OID characters from the file */ | |
225 | if (git_oid_fromstr(oid, str) < 0) | |
226 | goto corrupted; | |
227 | ||
228 | /* If the file is longer than 40 chars, the 41st must be a space */ | |
229 | str += GIT_OID_HEXSZ; | |
230 | if (*str == '\0' || git__isspace(*str)) | |
231 | return 0; | |
232 | ||
233 | corrupted: | |
234 | git_error_set(GIT_ERROR_REFERENCE, "corrupted loose reference file: %s", filename); | |
235 | return -1; | |
236 | } | |
237 | ||
238 | static int loose_readbuffer(git_str *buf, const char *base, const char *path) | |
239 | { | |
240 | int error; | |
241 | ||
242 | if ((error = loose_path(buf, base, path)) < 0 || | |
243 | (error = git_futils_readbuffer(buf, buf->ptr)) < 0) | |
244 | git_str_dispose(buf); | |
245 | ||
246 | return error; | |
247 | } | |
248 | ||
249 | static int loose_lookup_to_packfile(refdb_fs_backend *backend, const char *name) | |
250 | { | |
251 | int error = 0; | |
252 | git_str ref_file = GIT_STR_INIT; | |
253 | struct packref *ref = NULL; | |
254 | git_oid oid; | |
255 | ||
256 | /* if we fail to load the loose reference, assume someone changed | |
257 | * the filesystem under us and skip it... | |
258 | */ | |
259 | if (loose_readbuffer(&ref_file, backend->gitpath, name) < 0) { | |
260 | git_error_clear(); | |
261 | goto done; | |
262 | } | |
263 | ||
264 | /* skip symbolic refs */ | |
265 | if (!git__prefixcmp(git_str_cstr(&ref_file), GIT_SYMREF)) | |
266 | goto done; | |
267 | ||
268 | /* parse OID from file */ | |
269 | if ((error = loose_parse_oid(&oid, name, &ref_file)) < 0) | |
270 | goto done; | |
271 | ||
272 | if ((error = git_sortedcache_wlock(backend->refcache)) < 0) | |
273 | goto done; | |
274 | ||
275 | if (!(error = git_sortedcache_upsert( | |
276 | (void **)&ref, backend->refcache, name))) { | |
277 | ||
278 | git_oid_cpy(&ref->oid, &oid); | |
279 | ref->flags = PACKREF_WAS_LOOSE; | |
280 | } | |
281 | ||
282 | git_sortedcache_wunlock(backend->refcache); | |
283 | ||
284 | done: | |
285 | git_str_dispose(&ref_file); | |
286 | return error; | |
287 | } | |
288 | ||
289 | static int _dirent_loose_load(void *payload, git_str *full_path) | |
290 | { | |
291 | refdb_fs_backend *backend = payload; | |
292 | const char *file_path; | |
293 | ||
294 | if (git__suffixcmp(full_path->ptr, ".lock") == 0) | |
295 | return 0; | |
296 | ||
297 | if (git_fs_path_isdir(full_path->ptr)) { | |
298 | int error = git_fs_path_direach( | |
299 | full_path, backend->direach_flags, _dirent_loose_load, backend); | |
300 | /* Race with the filesystem, ignore it */ | |
301 | if (error == GIT_ENOTFOUND) { | |
302 | git_error_clear(); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | return error; | |
307 | } | |
308 | ||
309 | file_path = full_path->ptr + strlen(backend->gitpath); | |
310 | ||
311 | return loose_lookup_to_packfile(backend, file_path); | |
312 | } | |
313 | ||
314 | /* | |
315 | * Load all the loose references from the repository | |
316 | * into the in-memory Packfile, and build a vector with | |
317 | * all the references so it can be written back to | |
318 | * disk. | |
319 | */ | |
320 | static int packed_loadloose(refdb_fs_backend *backend) | |
321 | { | |
322 | int error; | |
323 | git_str refs_path = GIT_STR_INIT; | |
324 | ||
325 | if (git_str_joinpath(&refs_path, backend->gitpath, GIT_REFS_DIR) < 0) | |
326 | return -1; | |
327 | ||
328 | /* | |
329 | * Load all the loose files from disk into the Packfile table. | |
330 | * This will overwrite any old packed entries with their | |
331 | * updated loose versions | |
332 | */ | |
333 | error = git_fs_path_direach( | |
334 | &refs_path, backend->direach_flags, _dirent_loose_load, backend); | |
335 | ||
336 | git_str_dispose(&refs_path); | |
337 | ||
338 | return error; | |
339 | } | |
340 | ||
341 | static int refdb_fs_backend__exists( | |
342 | int *exists, | |
343 | git_refdb_backend *_backend, | |
344 | const char *ref_name) | |
345 | { | |
346 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
347 | git_str ref_path = GIT_STR_INIT; | |
348 | int error; | |
349 | ||
350 | GIT_ASSERT_ARG(backend); | |
351 | ||
352 | *exists = 0; | |
353 | ||
354 | if ((error = loose_path(&ref_path, backend->gitpath, ref_name)) < 0) | |
355 | goto out; | |
356 | ||
357 | if (git_fs_path_isfile(ref_path.ptr)) { | |
358 | *exists = 1; | |
359 | goto out; | |
360 | } | |
361 | ||
362 | if ((error = packed_reload(backend)) < 0) | |
363 | goto out; | |
364 | ||
365 | if (git_sortedcache_lookup(backend->refcache, ref_name) != NULL) { | |
366 | *exists = 1; | |
367 | goto out; | |
368 | } | |
369 | ||
370 | out: | |
371 | git_str_dispose(&ref_path); | |
372 | return error; | |
373 | } | |
374 | ||
375 | static const char *loose_parse_symbolic(git_str *file_content) | |
376 | { | |
377 | const unsigned int header_len = (unsigned int)strlen(GIT_SYMREF); | |
378 | const char *refname_start; | |
379 | ||
380 | refname_start = (const char *)file_content->ptr; | |
381 | ||
382 | if (git_str_len(file_content) < header_len + 1) { | |
383 | git_error_set(GIT_ERROR_REFERENCE, "corrupted loose reference file"); | |
384 | return NULL; | |
385 | } | |
386 | ||
387 | /* | |
388 | * Assume we have already checked for the header | |
389 | * before calling this function | |
390 | */ | |
391 | refname_start += header_len; | |
392 | ||
393 | return refname_start; | |
394 | } | |
395 | ||
396 | /* | |
397 | * Returns whether a reference is stored per worktree or not. | |
398 | * Per-worktree references are: | |
399 | * | |
400 | * - all pseudorefs, e.g. HEAD and MERGE_HEAD | |
401 | * - all references stored inside of "refs/bisect/" | |
402 | */ | |
403 | static bool is_per_worktree_ref(const char *ref_name) | |
404 | { | |
405 | return git__prefixcmp(ref_name, "refs/") != 0 || | |
406 | git__prefixcmp(ref_name, "refs/bisect/") == 0; | |
407 | } | |
408 | ||
409 | static int loose_lookup( | |
410 | git_reference **out, | |
411 | refdb_fs_backend *backend, | |
412 | const char *ref_name) | |
413 | { | |
414 | git_str ref_file = GIT_STR_INIT; | |
415 | int error = 0; | |
416 | const char *ref_dir; | |
417 | ||
418 | if (out) | |
419 | *out = NULL; | |
420 | ||
421 | if (is_per_worktree_ref(ref_name)) | |
422 | ref_dir = backend->gitpath; | |
423 | else | |
424 | ref_dir = backend->commonpath; | |
425 | ||
426 | if ((error = loose_readbuffer(&ref_file, ref_dir, ref_name)) < 0) | |
427 | /* cannot read loose ref file - gah */; | |
428 | else if (git__prefixcmp(git_str_cstr(&ref_file), GIT_SYMREF) == 0) { | |
429 | const char *target; | |
430 | ||
431 | git_str_rtrim(&ref_file); | |
432 | ||
433 | if (!(target = loose_parse_symbolic(&ref_file))) | |
434 | error = -1; | |
435 | else if (out != NULL) | |
436 | *out = git_reference__alloc_symbolic(ref_name, target); | |
437 | } else { | |
438 | git_oid oid; | |
439 | ||
440 | if (!(error = loose_parse_oid(&oid, ref_name, &ref_file)) && | |
441 | out != NULL) | |
442 | *out = git_reference__alloc(ref_name, &oid, NULL); | |
443 | } | |
444 | ||
445 | git_str_dispose(&ref_file); | |
446 | return error; | |
447 | } | |
448 | ||
449 | static int ref_error_notfound(const char *name) | |
450 | { | |
451 | git_error_set(GIT_ERROR_REFERENCE, "reference '%s' not found", name); | |
452 | return GIT_ENOTFOUND; | |
453 | } | |
454 | ||
455 | static char *packed_set_peeling_mode( | |
456 | char *data, | |
457 | size_t data_sz, | |
458 | refdb_fs_backend *backend) | |
459 | { | |
460 | static const char *traits_header = "# pack-refs with:"; | |
461 | char *eol; | |
462 | backend->peeling_mode = PEELING_NONE; | |
463 | ||
464 | if (git__prefixncmp(data, data_sz, traits_header) == 0) { | |
465 | size_t hdr_sz = strlen(traits_header); | |
466 | const char *sorted = " sorted "; | |
467 | const char *peeled = " peeled "; | |
468 | const char *fully_peeled = " fully-peeled "; | |
469 | data += hdr_sz; | |
470 | data_sz -= hdr_sz; | |
471 | ||
472 | eol = memchr(data, '\n', data_sz); | |
473 | ||
474 | if (!eol) | |
475 | return NULL; | |
476 | ||
477 | if (git__memmem(data, eol - data, fully_peeled, strlen(fully_peeled))) | |
478 | backend->peeling_mode = PEELING_FULL; | |
479 | else if (git__memmem(data, eol - data, peeled, strlen(peeled))) | |
480 | backend->peeling_mode = PEELING_STANDARD; | |
481 | ||
482 | backend->sorted = NULL != git__memmem(data, eol - data, sorted, strlen(sorted)); | |
483 | ||
484 | return eol + 1; | |
485 | } | |
486 | return data; | |
487 | } | |
488 | ||
489 | static void packed_map_free(refdb_fs_backend *backend) | |
490 | { | |
491 | if (backend->packed_refs_map.data) { | |
492 | #ifdef GIT_WIN32 | |
493 | git__free(backend->packed_refs_map.data); | |
494 | #else | |
495 | git_futils_mmap_free(&backend->packed_refs_map); | |
496 | #endif | |
497 | backend->packed_refs_map.data = NULL; | |
498 | backend->packed_refs_map.len = 0; | |
499 | git_futils_filestamp_set(&backend->packed_refs_stamp, NULL); | |
500 | } | |
501 | } | |
502 | ||
503 | static int packed_map_check(refdb_fs_backend *backend) | |
504 | { | |
505 | int error = 0; | |
506 | git_file fd = -1; | |
507 | struct stat st; | |
508 | ||
509 | if ((error = git_mutex_lock(&backend->prlock)) < 0) | |
510 | return error; | |
511 | ||
512 | if (backend->packed_refs_map.data && | |
513 | !git_futils_filestamp_check( | |
514 | &backend->packed_refs_stamp, backend->refcache->path)) { | |
515 | git_mutex_unlock(&backend->prlock); | |
516 | return error; | |
517 | } | |
518 | packed_map_free(backend); | |
519 | ||
520 | fd = git_futils_open_ro(backend->refcache->path); | |
521 | if (fd < 0) { | |
522 | git_mutex_unlock(&backend->prlock); | |
523 | if (fd == GIT_ENOTFOUND) { | |
524 | git_error_clear(); | |
525 | return 0; | |
526 | } | |
527 | return fd; | |
528 | } | |
529 | ||
530 | if (p_fstat(fd, &st) < 0) { | |
531 | p_close(fd); | |
532 | git_mutex_unlock(&backend->prlock); | |
533 | git_error_set(GIT_ERROR_OS, "unable to stat packed-refs '%s'", backend->refcache->path); | |
534 | return -1; | |
535 | } | |
536 | ||
537 | if (st.st_size == 0) { | |
538 | p_close(fd); | |
539 | git_mutex_unlock(&backend->prlock); | |
540 | return 0; | |
541 | } | |
542 | ||
543 | git_futils_filestamp_set_from_stat(&backend->packed_refs_stamp, &st); | |
544 | ||
545 | #ifdef GIT_WIN32 | |
546 | /* on windows, we copy the entire file into memory rather than using | |
547 | * mmap() because using mmap() on windows also locks the file and this | |
548 | * map is long-lived. */ | |
549 | backend->packed_refs_map.len = (size_t)st.st_size; | |
550 | backend->packed_refs_map.data = | |
551 | git__malloc(backend->packed_refs_map.len); | |
552 | GIT_ERROR_CHECK_ALLOC(backend->packed_refs_map.data); | |
553 | { | |
554 | ssize_t bytesread = | |
555 | p_read(fd, backend->packed_refs_map.data, | |
556 | backend->packed_refs_map.len); | |
557 | error = (bytesread == (ssize_t)backend->packed_refs_map.len) ? 0 : -1; | |
558 | } | |
559 | #else | |
560 | error = git_futils_mmap_ro(&backend->packed_refs_map, fd, 0, (size_t)st.st_size); | |
561 | #endif | |
562 | p_close(fd); | |
563 | if (error < 0) { | |
564 | git_mutex_unlock(&backend->prlock); | |
565 | return error; | |
566 | } | |
567 | ||
568 | packed_set_peeling_mode( | |
569 | backend->packed_refs_map.data, backend->packed_refs_map.len, | |
570 | backend); | |
571 | ||
572 | git_mutex_unlock(&backend->prlock); | |
573 | return error; | |
574 | } | |
575 | ||
576 | /* | |
577 | * Find beginning of packed-ref record pointed to by p. | |
578 | * buf - a lower-bound pointer to some memory buffer | |
579 | * p - an upper-bound pointer to the same memory buffer | |
580 | */ | |
581 | static const char *start_of_record(const char *buf, const char *p) | |
582 | { | |
583 | const char *nl = p; | |
584 | while (true) { | |
585 | nl = git__memrchr(buf, '\n', nl - buf); | |
586 | if (!nl) | |
587 | return buf; | |
588 | ||
589 | if (nl[1] == '^' && nl > buf) | |
590 | --nl; | |
591 | else | |
592 | break; | |
593 | }; | |
594 | return nl + 1; | |
595 | } | |
596 | ||
597 | /* | |
598 | * Find end of packed-ref record pointed to by p. | |
599 | * end - an upper-bound pointer to some memory buffer | |
600 | * p - a lower-bound pointer to the same memory buffer | |
601 | */ | |
602 | static const char *end_of_record(const char *p, const char *end) | |
603 | { | |
604 | while (1) { | |
605 | size_t sz = end - p; | |
606 | p = memchr(p, '\n', sz); | |
607 | if (!p) | |
608 | return end; | |
609 | ++p; | |
610 | if (p < end && p[0] == '^') | |
611 | ++p; | |
612 | else | |
613 | break; | |
614 | } | |
615 | return p; | |
616 | } | |
617 | ||
618 | static int | |
619 | cmp_record_to_refname(const char *rec, size_t data_end, const char *ref_name) | |
620 | { | |
621 | const size_t ref_len = strlen(ref_name); | |
622 | int cmp_val; | |
623 | const char *end; | |
624 | ||
625 | rec += GIT_OID_HEXSZ + 1; /* <oid> + space */ | |
626 | if (data_end < GIT_OID_HEXSZ + 3) { | |
627 | /* an incomplete (corrupt) record is treated as less than ref_name */ | |
628 | return -1; | |
629 | } | |
630 | data_end -= GIT_OID_HEXSZ + 1; | |
631 | ||
632 | end = memchr(rec, '\n', data_end); | |
633 | if (end) | |
634 | data_end = end - rec; | |
635 | ||
636 | cmp_val = memcmp(rec, ref_name, min(ref_len, data_end)); | |
637 | ||
638 | if (cmp_val == 0 && data_end != ref_len) | |
639 | return (data_end > ref_len) ? 1 : -1; | |
640 | return cmp_val; | |
641 | } | |
642 | ||
643 | static int packed_unsorted_lookup( | |
644 | git_reference **out, | |
645 | refdb_fs_backend *backend, | |
646 | const char *ref_name) | |
647 | { | |
648 | int error = 0; | |
649 | struct packref *entry; | |
650 | ||
651 | if ((error = packed_reload(backend)) < 0) | |
652 | return error; | |
653 | ||
654 | if (git_sortedcache_rlock(backend->refcache) < 0) | |
655 | return -1; | |
656 | ||
657 | entry = git_sortedcache_lookup(backend->refcache, ref_name); | |
658 | if (!entry) { | |
659 | error = ref_error_notfound(ref_name); | |
660 | } else { | |
661 | *out = git_reference__alloc(ref_name, &entry->oid, &entry->peel); | |
662 | if (!*out) | |
663 | error = -1; | |
664 | } | |
665 | ||
666 | git_sortedcache_runlock(backend->refcache); | |
667 | ||
668 | return error; | |
669 | } | |
670 | ||
671 | static int packed_lookup( | |
672 | git_reference **out, | |
673 | refdb_fs_backend *backend, | |
674 | const char *ref_name) | |
675 | { | |
676 | int error = 0; | |
677 | const char *left, *right, *data_end; | |
678 | ||
679 | if ((error = packed_map_check(backend)) < 0) | |
680 | return error; | |
681 | ||
682 | if (!backend->sorted) | |
683 | return packed_unsorted_lookup(out, backend, ref_name); | |
684 | ||
685 | left = backend->packed_refs_map.data; | |
686 | right = data_end = (const char *) backend->packed_refs_map.data + | |
687 | backend->packed_refs_map.len; | |
688 | ||
689 | while (left < right && *left == '#') { | |
690 | if (!(left = memchr(left, '\n', data_end - left))) | |
691 | goto parse_failed; | |
692 | left++; | |
693 | } | |
694 | ||
695 | while (left < right) { | |
696 | const char *mid, *rec; | |
697 | int compare; | |
698 | ||
699 | mid = left + (right - left) / 2; | |
700 | rec = start_of_record(left, mid); | |
701 | compare = cmp_record_to_refname(rec, data_end - rec, ref_name); | |
702 | ||
703 | if (compare < 0) { | |
704 | left = end_of_record(mid, right); | |
705 | } else if (compare > 0) { | |
706 | right = rec; | |
707 | } else { | |
708 | const char *eol; | |
709 | git_oid oid, peel, *peel_ptr = NULL; | |
710 | ||
711 | if (data_end - rec < GIT_OID_HEXSZ || | |
712 | git_oid_fromstr(&oid, rec) < 0) { | |
713 | goto parse_failed; | |
714 | } | |
715 | rec += GIT_OID_HEXSZ + 1; | |
716 | if (!(eol = memchr(rec, '\n', data_end - rec))) { | |
717 | goto parse_failed; | |
718 | } | |
719 | ||
720 | /* look for optional "^<OID>\n" */ | |
721 | ||
722 | if (eol + 1 < data_end) { | |
723 | rec = eol + 1; | |
724 | ||
725 | if (*rec == '^') { | |
726 | rec++; | |
727 | if (data_end - rec < GIT_OID_HEXSZ || | |
728 | git_oid_fromstr(&peel, rec) < 0) { | |
729 | goto parse_failed; | |
730 | } | |
731 | peel_ptr = &peel; | |
732 | } | |
733 | } | |
734 | ||
735 | *out = git_reference__alloc(ref_name, &oid, peel_ptr); | |
736 | if (!*out) { | |
737 | return -1; | |
738 | } | |
739 | ||
740 | return 0; | |
741 | } | |
742 | } | |
743 | return GIT_ENOTFOUND; | |
744 | ||
745 | parse_failed: | |
746 | git_error_set(GIT_ERROR_REFERENCE, "corrupted packed references file"); | |
747 | return -1; | |
748 | } | |
749 | ||
750 | static int refdb_fs_backend__lookup( | |
751 | git_reference **out, | |
752 | git_refdb_backend *_backend, | |
753 | const char *ref_name) | |
754 | { | |
755 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
756 | int error; | |
757 | ||
758 | GIT_ASSERT_ARG(backend); | |
759 | ||
760 | if (!(error = loose_lookup(out, backend, ref_name))) | |
761 | return 0; | |
762 | ||
763 | /* only try to lookup this reference on the packfile if it | |
764 | * wasn't found on the loose refs; not if there was a critical error */ | |
765 | if (error == GIT_ENOTFOUND) { | |
766 | git_error_clear(); | |
767 | error = packed_lookup(out, backend, ref_name); | |
768 | } | |
769 | return error; | |
770 | } | |
771 | ||
772 | typedef struct { | |
773 | git_reference_iterator parent; | |
774 | ||
775 | char *glob; | |
776 | ||
777 | git_pool pool; | |
778 | git_vector loose; | |
779 | ||
780 | git_sortedcache *cache; | |
781 | size_t loose_pos; | |
782 | size_t packed_pos; | |
783 | } refdb_fs_iter; | |
784 | ||
785 | static void refdb_fs_backend__iterator_free(git_reference_iterator *_iter) | |
786 | { | |
787 | refdb_fs_iter *iter = GIT_CONTAINER_OF(_iter, refdb_fs_iter, parent); | |
788 | ||
789 | git_vector_free(&iter->loose); | |
790 | git_pool_clear(&iter->pool); | |
791 | git_sortedcache_free(iter->cache); | |
792 | git__free(iter); | |
793 | } | |
794 | ||
795 | static int iter_load_loose_paths(refdb_fs_backend *backend, refdb_fs_iter *iter) | |
796 | { | |
797 | int error = 0; | |
798 | git_str path = GIT_STR_INIT; | |
799 | git_iterator *fsit = NULL; | |
800 | git_iterator_options fsit_opts = GIT_ITERATOR_OPTIONS_INIT; | |
801 | const git_index_entry *entry = NULL; | |
802 | const char *ref_prefix = GIT_REFS_DIR; | |
803 | size_t ref_prefix_len = strlen(ref_prefix); | |
804 | ||
805 | if (!backend->commonpath) /* do nothing if no commonpath for loose refs */ | |
806 | return 0; | |
807 | ||
808 | fsit_opts.flags = backend->iterator_flags; | |
809 | ||
810 | if (iter->glob) { | |
811 | const char *last_sep = NULL; | |
812 | const char *pos; | |
813 | for (pos = iter->glob; *pos; ++pos) { | |
814 | switch (*pos) { | |
815 | case '?': | |
816 | case '*': | |
817 | case '[': | |
818 | case '\\': | |
819 | break; | |
820 | case '/': | |
821 | last_sep = pos; | |
822 | /* FALLTHROUGH */ | |
823 | default: | |
824 | continue; | |
825 | } | |
826 | break; | |
827 | } | |
828 | if (last_sep) { | |
829 | ref_prefix = iter->glob; | |
830 | ref_prefix_len = (last_sep - ref_prefix) + 1; | |
831 | } | |
832 | } | |
833 | ||
834 | if ((error = git_str_puts(&path, backend->commonpath)) < 0 || | |
835 | (error = git_str_put(&path, ref_prefix, ref_prefix_len)) < 0) { | |
836 | git_str_dispose(&path); | |
837 | return error; | |
838 | } | |
839 | ||
840 | if ((error = git_iterator_for_filesystem(&fsit, path.ptr, &fsit_opts)) < 0) { | |
841 | git_str_dispose(&path); | |
842 | return (iter->glob && error == GIT_ENOTFOUND)? 0 : error; | |
843 | } | |
844 | ||
845 | error = git_str_sets(&path, ref_prefix); | |
846 | ||
847 | while (!error && !git_iterator_advance(&entry, fsit)) { | |
848 | const char *ref_name; | |
849 | char *ref_dup; | |
850 | ||
851 | git_str_truncate(&path, ref_prefix_len); | |
852 | git_str_puts(&path, entry->path); | |
853 | ref_name = git_str_cstr(&path); | |
854 | ||
855 | if (git__suffixcmp(ref_name, ".lock") == 0 || | |
856 | (iter->glob && wildmatch(iter->glob, ref_name, 0) != 0)) | |
857 | continue; | |
858 | ||
859 | ref_dup = git_pool_strdup(&iter->pool, ref_name); | |
860 | if (!ref_dup) | |
861 | error = -1; | |
862 | else | |
863 | error = git_vector_insert(&iter->loose, ref_dup); | |
864 | } | |
865 | ||
866 | git_iterator_free(fsit); | |
867 | git_str_dispose(&path); | |
868 | ||
869 | return error; | |
870 | } | |
871 | ||
872 | static int refdb_fs_backend__iterator_next( | |
873 | git_reference **out, git_reference_iterator *_iter) | |
874 | { | |
875 | int error = GIT_ITEROVER; | |
876 | refdb_fs_iter *iter = GIT_CONTAINER_OF(_iter, refdb_fs_iter, parent); | |
877 | refdb_fs_backend *backend = GIT_CONTAINER_OF(iter->parent.db->backend, refdb_fs_backend, parent); | |
878 | struct packref *ref; | |
879 | ||
880 | while (iter->loose_pos < iter->loose.length) { | |
881 | const char *path = git_vector_get(&iter->loose, iter->loose_pos++); | |
882 | ||
883 | if (loose_lookup(out, backend, path) == 0) { | |
884 | ref = git_sortedcache_lookup(iter->cache, path); | |
885 | if (ref) | |
886 | ref->flags |= PACKREF_SHADOWED; | |
887 | ||
888 | return 0; | |
889 | } | |
890 | ||
891 | git_error_clear(); | |
892 | } | |
893 | ||
894 | error = GIT_ITEROVER; | |
895 | while (iter->packed_pos < git_sortedcache_entrycount(iter->cache)) { | |
896 | ref = git_sortedcache_entry(iter->cache, iter->packed_pos++); | |
897 | if (!ref) /* stop now if another thread deleted refs and we past end */ | |
898 | break; | |
899 | ||
900 | if (ref->flags & PACKREF_SHADOWED) | |
901 | continue; | |
902 | if (iter->glob && wildmatch(iter->glob, ref->name, 0) != 0) | |
903 | continue; | |
904 | ||
905 | *out = git_reference__alloc(ref->name, &ref->oid, &ref->peel); | |
906 | error = (*out != NULL) ? 0 : -1; | |
907 | break; | |
908 | } | |
909 | ||
910 | return error; | |
911 | } | |
912 | ||
913 | static int refdb_fs_backend__iterator_next_name( | |
914 | const char **out, git_reference_iterator *_iter) | |
915 | { | |
916 | int error = GIT_ITEROVER; | |
917 | refdb_fs_iter *iter = GIT_CONTAINER_OF(_iter, refdb_fs_iter, parent); | |
918 | refdb_fs_backend *backend = GIT_CONTAINER_OF(iter->parent.db->backend, refdb_fs_backend, parent); | |
919 | struct packref *ref; | |
920 | ||
921 | while (iter->loose_pos < iter->loose.length) { | |
922 | const char *path = git_vector_get(&iter->loose, iter->loose_pos++); | |
923 | struct packref *ref; | |
924 | ||
925 | if (loose_lookup(NULL, backend, path) == 0) { | |
926 | ref = git_sortedcache_lookup(iter->cache, path); | |
927 | if (ref) | |
928 | ref->flags |= PACKREF_SHADOWED; | |
929 | ||
930 | *out = path; | |
931 | return 0; | |
932 | } | |
933 | ||
934 | git_error_clear(); | |
935 | } | |
936 | ||
937 | error = GIT_ITEROVER; | |
938 | while (iter->packed_pos < git_sortedcache_entrycount(iter->cache)) { | |
939 | ref = git_sortedcache_entry(iter->cache, iter->packed_pos++); | |
940 | if (!ref) /* stop now if another thread deleted refs and we past end */ | |
941 | break; | |
942 | ||
943 | if (ref->flags & PACKREF_SHADOWED) | |
944 | continue; | |
945 | if (iter->glob && wildmatch(iter->glob, ref->name, 0) != 0) | |
946 | continue; | |
947 | ||
948 | *out = ref->name; | |
949 | error = 0; | |
950 | break; | |
951 | } | |
952 | ||
953 | return error; | |
954 | } | |
955 | ||
956 | static int refdb_fs_backend__iterator( | |
957 | git_reference_iterator **out, git_refdb_backend *_backend, const char *glob) | |
958 | { | |
959 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
960 | refdb_fs_iter *iter = NULL; | |
961 | int error; | |
962 | ||
963 | GIT_ASSERT_ARG(backend); | |
964 | ||
965 | iter = git__calloc(1, sizeof(refdb_fs_iter)); | |
966 | GIT_ERROR_CHECK_ALLOC(iter); | |
967 | ||
968 | if ((error = git_pool_init(&iter->pool, 1)) < 0) | |
969 | goto out; | |
970 | ||
971 | if ((error = git_vector_init(&iter->loose, 8, NULL)) < 0) | |
972 | goto out; | |
973 | ||
974 | if (glob != NULL && | |
975 | (iter->glob = git_pool_strdup(&iter->pool, glob)) == NULL) { | |
976 | error = GIT_ERROR_NOMEMORY; | |
977 | goto out; | |
978 | } | |
979 | ||
980 | if ((error = iter_load_loose_paths(backend, iter)) < 0) | |
981 | goto out; | |
982 | ||
983 | if ((error = packed_reload(backend)) < 0) | |
984 | goto out; | |
985 | ||
986 | if ((error = git_sortedcache_copy(&iter->cache, backend->refcache, 1, NULL, NULL)) < 0) | |
987 | goto out; | |
988 | ||
989 | iter->parent.next = refdb_fs_backend__iterator_next; | |
990 | iter->parent.next_name = refdb_fs_backend__iterator_next_name; | |
991 | iter->parent.free = refdb_fs_backend__iterator_free; | |
992 | ||
993 | *out = (git_reference_iterator *)iter; | |
994 | out: | |
995 | if (error) | |
996 | refdb_fs_backend__iterator_free((git_reference_iterator *)iter); | |
997 | return error; | |
998 | } | |
999 | ||
1000 | static bool ref_is_available( | |
1001 | const char *old_ref, const char *new_ref, const char *this_ref) | |
1002 | { | |
1003 | if (old_ref == NULL || strcmp(old_ref, this_ref)) { | |
1004 | size_t reflen = strlen(this_ref); | |
1005 | size_t newlen = strlen(new_ref); | |
1006 | size_t cmplen = reflen < newlen ? reflen : newlen; | |
1007 | const char *lead = reflen < newlen ? new_ref : this_ref; | |
1008 | ||
1009 | if (!strncmp(new_ref, this_ref, cmplen) && lead[cmplen] == '/') { | |
1010 | return false; | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | return true; | |
1015 | } | |
1016 | ||
1017 | static int reference_path_available( | |
1018 | refdb_fs_backend *backend, | |
1019 | const char *new_ref, | |
1020 | const char *old_ref, | |
1021 | int force) | |
1022 | { | |
1023 | size_t i; | |
1024 | int error; | |
1025 | ||
1026 | if ((error = packed_reload(backend)) < 0) | |
1027 | return error; | |
1028 | ||
1029 | if (!force) { | |
1030 | int exists; | |
1031 | ||
1032 | if ((error = refdb_fs_backend__exists( | |
1033 | &exists, (git_refdb_backend *)backend, new_ref)) < 0) { | |
1034 | return error; | |
1035 | } | |
1036 | ||
1037 | if (exists) { | |
1038 | git_error_set(GIT_ERROR_REFERENCE, | |
1039 | "failed to write reference '%s': a reference with " | |
1040 | "that name already exists.", new_ref); | |
1041 | return GIT_EEXISTS; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | if ((error = git_sortedcache_rlock(backend->refcache)) < 0) | |
1046 | return error; | |
1047 | ||
1048 | for (i = 0; i < git_sortedcache_entrycount(backend->refcache); ++i) { | |
1049 | struct packref *ref = git_sortedcache_entry(backend->refcache, i); | |
1050 | ||
1051 | if (ref && !ref_is_available(old_ref, new_ref, ref->name)) { | |
1052 | git_sortedcache_runlock(backend->refcache); | |
1053 | git_error_set(GIT_ERROR_REFERENCE, | |
1054 | "path to reference '%s' collides with existing one", new_ref); | |
1055 | return -1; | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | git_sortedcache_runlock(backend->refcache); | |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | static int loose_lock(git_filebuf *file, refdb_fs_backend *backend, const char *name) | |
1064 | { | |
1065 | int error, filebuf_flags; | |
1066 | git_str ref_path = GIT_STR_INIT; | |
1067 | const char *basedir; | |
1068 | ||
1069 | GIT_ASSERT_ARG(file); | |
1070 | GIT_ASSERT_ARG(backend); | |
1071 | GIT_ASSERT_ARG(name); | |
1072 | ||
1073 | if (!git_path_is_valid(backend->repo, name, 0, GIT_FS_PATH_REJECT_FILESYSTEM_DEFAULTS)) { | |
1074 | git_error_set(GIT_ERROR_INVALID, "invalid reference name '%s'", name); | |
1075 | return GIT_EINVALIDSPEC; | |
1076 | } | |
1077 | ||
1078 | if (is_per_worktree_ref(name)) | |
1079 | basedir = backend->gitpath; | |
1080 | else | |
1081 | basedir = backend->commonpath; | |
1082 | ||
1083 | /* Remove a possibly existing empty directory hierarchy | |
1084 | * which name would collide with the reference name | |
1085 | */ | |
1086 | if ((error = git_futils_rmdir_r(name, basedir, GIT_RMDIR_SKIP_NONEMPTY)) < 0) | |
1087 | return error; | |
1088 | ||
1089 | if ((error = loose_path(&ref_path, basedir, name)) < 0) | |
1090 | return error; | |
1091 | ||
1092 | filebuf_flags = GIT_FILEBUF_CREATE_LEADING_DIRS; | |
1093 | if (backend->fsync) | |
1094 | filebuf_flags |= GIT_FILEBUF_FSYNC; | |
1095 | ||
1096 | error = git_filebuf_open(file, ref_path.ptr, filebuf_flags, GIT_REFS_FILE_MODE); | |
1097 | ||
1098 | if (error == GIT_EDIRECTORY) | |
1099 | git_error_set(GIT_ERROR_REFERENCE, "cannot lock ref '%s', there are refs beneath that folder", name); | |
1100 | ||
1101 | git_str_dispose(&ref_path); | |
1102 | return error; | |
1103 | } | |
1104 | ||
1105 | static int loose_commit(git_filebuf *file, const git_reference *ref) | |
1106 | { | |
1107 | GIT_ASSERT_ARG(file); | |
1108 | GIT_ASSERT_ARG(ref); | |
1109 | ||
1110 | if (ref->type == GIT_REFERENCE_DIRECT) { | |
1111 | char oid[GIT_OID_HEXSZ + 1]; | |
1112 | git_oid_nfmt(oid, sizeof(oid), &ref->target.oid); | |
1113 | ||
1114 | git_filebuf_printf(file, "%s\n", oid); | |
1115 | } else if (ref->type == GIT_REFERENCE_SYMBOLIC) { | |
1116 | git_filebuf_printf(file, GIT_SYMREF "%s\n", ref->target.symbolic); | |
1117 | } else { | |
1118 | GIT_ASSERT(0); | |
1119 | } | |
1120 | ||
1121 | return git_filebuf_commit(file); | |
1122 | } | |
1123 | ||
1124 | static int refdb_fs_backend__lock(void **out, git_refdb_backend *_backend, const char *refname) | |
1125 | { | |
1126 | int error; | |
1127 | git_filebuf *lock; | |
1128 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
1129 | ||
1130 | lock = git__calloc(1, sizeof(git_filebuf)); | |
1131 | GIT_ERROR_CHECK_ALLOC(lock); | |
1132 | ||
1133 | if ((error = loose_lock(lock, backend, refname)) < 0) { | |
1134 | git__free(lock); | |
1135 | return error; | |
1136 | } | |
1137 | ||
1138 | *out = lock; | |
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | static int refdb_fs_backend__write_tail( | |
1143 | git_refdb_backend *_backend, | |
1144 | const git_reference *ref, | |
1145 | git_filebuf *file, | |
1146 | int update_reflog, | |
1147 | const git_oid *old_id, | |
1148 | const char *old_target, | |
1149 | const git_signature *who, | |
1150 | const char *message); | |
1151 | ||
1152 | static int refdb_fs_backend__delete_tail( | |
1153 | git_refdb_backend *_backend, | |
1154 | git_filebuf *file, | |
1155 | const char *ref_name, | |
1156 | const git_oid *old_id, | |
1157 | const char *old_target); | |
1158 | ||
1159 | static int refdb_fs_backend__unlock(git_refdb_backend *backend, void *payload, int success, int update_reflog, | |
1160 | const git_reference *ref, const git_signature *sig, const char *message) | |
1161 | { | |
1162 | git_filebuf *lock = (git_filebuf *) payload; | |
1163 | int error = 0; | |
1164 | ||
1165 | if (success == 2) | |
1166 | error = refdb_fs_backend__delete_tail(backend, lock, ref->name, NULL, NULL); | |
1167 | else if (success) | |
1168 | error = refdb_fs_backend__write_tail(backend, ref, lock, update_reflog, NULL, NULL, sig, message); | |
1169 | else | |
1170 | git_filebuf_cleanup(lock); | |
1171 | ||
1172 | git__free(lock); | |
1173 | return error; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * Find out what object this reference resolves to. | |
1178 | * | |
1179 | * For references that point to a 'big' tag (e.g. an | |
1180 | * actual tag object on the repository), we need to | |
1181 | * cache on the packfile the OID of the object to | |
1182 | * which that 'big tag' is pointing to. | |
1183 | */ | |
1184 | static int packed_find_peel(refdb_fs_backend *backend, struct packref *ref) | |
1185 | { | |
1186 | git_object *object; | |
1187 | ||
1188 | if (ref->flags & PACKREF_HAS_PEEL || ref->flags & PACKREF_CANNOT_PEEL) | |
1189 | return 0; | |
1190 | ||
1191 | /* | |
1192 | * Find the tagged object in the repository | |
1193 | */ | |
1194 | if (git_object_lookup(&object, backend->repo, &ref->oid, GIT_OBJECT_ANY) < 0) | |
1195 | return -1; | |
1196 | ||
1197 | /* | |
1198 | * If the tagged object is a Tag object, we need to resolve it; | |
1199 | * if the ref is actually a 'weak' ref, we don't need to resolve | |
1200 | * anything. | |
1201 | */ | |
1202 | if (git_object_type(object) == GIT_OBJECT_TAG) { | |
1203 | git_tag *tag = (git_tag *)object; | |
1204 | ||
1205 | /* | |
1206 | * Find the object pointed at by this tag | |
1207 | */ | |
1208 | git_oid_cpy(&ref->peel, git_tag_target_id(tag)); | |
1209 | ref->flags |= PACKREF_HAS_PEEL; | |
1210 | ||
1211 | /* | |
1212 | * The reference has now cached the resolved OID, and is | |
1213 | * marked at such. When written to the packfile, it'll be | |
1214 | * accompanied by this resolved oid | |
1215 | */ | |
1216 | } | |
1217 | ||
1218 | git_object_free(object); | |
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | /* | |
1223 | * Write a single reference into a packfile | |
1224 | */ | |
1225 | static int packed_write_ref(struct packref *ref, git_filebuf *file) | |
1226 | { | |
1227 | char oid[GIT_OID_HEXSZ + 1]; | |
1228 | git_oid_nfmt(oid, sizeof(oid), &ref->oid); | |
1229 | ||
1230 | /* | |
1231 | * For references that peel to an object in the repo, we must | |
1232 | * write the resulting peel on a separate line, e.g. | |
1233 | * | |
1234 | * 6fa8a902cc1d18527e1355773c86721945475d37 refs/tags/libgit2-0.4 | |
1235 | * ^2ec0cb7959b0bf965d54f95453f5b4b34e8d3100 | |
1236 | * | |
1237 | * This obviously only applies to tags. | |
1238 | * The required peels have already been loaded into `ref->peel_target`. | |
1239 | */ | |
1240 | if (ref->flags & PACKREF_HAS_PEEL) { | |
1241 | char peel[GIT_OID_HEXSZ + 1]; | |
1242 | git_oid_nfmt(peel, sizeof(peel), &ref->peel); | |
1243 | ||
1244 | if (git_filebuf_printf(file, "%s %s\n^%s\n", oid, ref->name, peel) < 0) | |
1245 | return -1; | |
1246 | } else { | |
1247 | if (git_filebuf_printf(file, "%s %s\n", oid, ref->name) < 0) | |
1248 | return -1; | |
1249 | } | |
1250 | ||
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Remove all loose references | |
1256 | * | |
1257 | * Once we have successfully written a packfile, | |
1258 | * all the loose references that were packed must be | |
1259 | * removed from disk. | |
1260 | * | |
1261 | * This is a dangerous method; make sure the packfile | |
1262 | * is well-written, because we are destructing references | |
1263 | * here otherwise. | |
1264 | */ | |
1265 | static int packed_remove_loose(refdb_fs_backend *backend) | |
1266 | { | |
1267 | size_t i; | |
1268 | git_filebuf lock = GIT_FILEBUF_INIT; | |
1269 | git_str ref_content = GIT_STR_INIT; | |
1270 | int error = 0; | |
1271 | ||
1272 | /* backend->refcache is already locked when this is called */ | |
1273 | ||
1274 | for (i = 0; i < git_sortedcache_entrycount(backend->refcache); ++i) { | |
1275 | struct packref *ref = git_sortedcache_entry(backend->refcache, i); | |
1276 | git_oid current_id; | |
1277 | ||
1278 | if (!ref || !(ref->flags & PACKREF_WAS_LOOSE)) | |
1279 | continue; | |
1280 | ||
1281 | git_filebuf_cleanup(&lock); | |
1282 | ||
1283 | /* We need to stop anybody from updating the ref while we try to do a safe delete */ | |
1284 | error = loose_lock(&lock, backend, ref->name); | |
1285 | /* If someone else is updating it, let them do it */ | |
1286 | if (error == GIT_EEXISTS || error == GIT_ENOTFOUND) | |
1287 | continue; | |
1288 | ||
1289 | if (error < 0) { | |
1290 | git_str_dispose(&ref_content); | |
1291 | git_error_set(GIT_ERROR_REFERENCE, "failed to lock loose reference '%s'", ref->name); | |
1292 | return error; | |
1293 | } | |
1294 | ||
1295 | error = git_futils_readbuffer(&ref_content, lock.path_original); | |
1296 | /* Someone else beat us to cleaning up the ref, let's simply continue */ | |
1297 | if (error == GIT_ENOTFOUND) | |
1298 | continue; | |
1299 | ||
1300 | /* This became a symref between us packing and trying to delete it, so ignore it */ | |
1301 | if (!git__prefixcmp(ref_content.ptr, GIT_SYMREF)) | |
1302 | continue; | |
1303 | ||
1304 | /* Figure out the current id; if we find a bad ref file, skip it so we can do the rest */ | |
1305 | if (loose_parse_oid(¤t_id, lock.path_original, &ref_content) < 0) | |
1306 | continue; | |
1307 | ||
1308 | /* If the ref moved since we packed it, we must not delete it */ | |
1309 | if (!git_oid_equal(¤t_id, &ref->oid)) | |
1310 | continue; | |
1311 | ||
1312 | /* | |
1313 | * if we fail to remove a single file, this is *not* good, | |
1314 | * but we should keep going and remove as many as possible. | |
1315 | * If we fail to remove, the ref is still in the old state, so | |
1316 | * we haven't lost information. | |
1317 | */ | |
1318 | p_unlink(lock.path_original); | |
1319 | } | |
1320 | ||
1321 | git_str_dispose(&ref_content); | |
1322 | git_filebuf_cleanup(&lock); | |
1323 | return 0; | |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * Write all the contents in the in-memory packfile to disk. | |
1328 | */ | |
1329 | static int packed_write(refdb_fs_backend *backend) | |
1330 | { | |
1331 | git_sortedcache *refcache = backend->refcache; | |
1332 | git_filebuf pack_file = GIT_FILEBUF_INIT; | |
1333 | int error, open_flags = 0; | |
1334 | size_t i; | |
1335 | ||
1336 | /* take lock and close up packed-refs mmap if open */ | |
1337 | if ((error = git_mutex_lock(&backend->prlock)) < 0) { | |
1338 | return error; | |
1339 | } | |
1340 | ||
1341 | packed_map_free(backend); | |
1342 | ||
1343 | git_mutex_unlock(&backend->prlock); | |
1344 | ||
1345 | /* lock the cache to updates while we do this */ | |
1346 | if ((error = git_sortedcache_wlock(refcache)) < 0) | |
1347 | return error; | |
1348 | ||
1349 | if (backend->fsync) | |
1350 | open_flags = GIT_FILEBUF_FSYNC; | |
1351 | ||
1352 | /* Open the file! */ | |
1353 | if ((error = git_filebuf_open(&pack_file, git_sortedcache_path(refcache), open_flags, GIT_PACKEDREFS_FILE_MODE)) < 0) | |
1354 | goto fail; | |
1355 | ||
1356 | /* Packfiles have a header... apparently | |
1357 | * This is in fact not required, but we might as well print it | |
1358 | * just for kicks */ | |
1359 | if ((error = git_filebuf_printf(&pack_file, "%s\n", GIT_PACKEDREFS_HEADER)) < 0) | |
1360 | goto fail; | |
1361 | ||
1362 | for (i = 0; i < git_sortedcache_entrycount(refcache); ++i) { | |
1363 | struct packref *ref = git_sortedcache_entry(refcache, i); | |
1364 | GIT_ASSERT(ref); | |
1365 | ||
1366 | if ((error = packed_find_peel(backend, ref)) < 0) | |
1367 | goto fail; | |
1368 | ||
1369 | if ((error = packed_write_ref(ref, &pack_file)) < 0) | |
1370 | goto fail; | |
1371 | } | |
1372 | ||
1373 | /* if we've written all the references properly, we can commit | |
1374 | * the packfile to make the changes effective */ | |
1375 | if ((error = git_filebuf_commit(&pack_file)) < 0) | |
1376 | goto fail; | |
1377 | ||
1378 | /* when and only when the packfile has been properly written, | |
1379 | * we can go ahead and remove the loose refs */ | |
1380 | if ((error = packed_remove_loose(backend)) < 0) | |
1381 | goto fail; | |
1382 | ||
1383 | git_sortedcache_updated(refcache); | |
1384 | git_sortedcache_wunlock(refcache); | |
1385 | ||
1386 | /* we're good now */ | |
1387 | return 0; | |
1388 | ||
1389 | fail: | |
1390 | git_filebuf_cleanup(&pack_file); | |
1391 | git_sortedcache_wunlock(refcache); | |
1392 | ||
1393 | return error; | |
1394 | } | |
1395 | ||
1396 | static int packed_delete(refdb_fs_backend *backend, const char *ref_name) | |
1397 | { | |
1398 | size_t pack_pos; | |
1399 | int error, found = 0; | |
1400 | ||
1401 | if ((error = packed_reload(backend)) < 0) | |
1402 | goto cleanup; | |
1403 | ||
1404 | if ((error = git_sortedcache_wlock(backend->refcache)) < 0) | |
1405 | goto cleanup; | |
1406 | ||
1407 | /* If a packed reference exists, remove it from the packfile and repack if necessary */ | |
1408 | error = git_sortedcache_lookup_index(&pack_pos, backend->refcache, ref_name); | |
1409 | if (error == 0) { | |
1410 | error = git_sortedcache_remove(backend->refcache, pack_pos); | |
1411 | found = 1; | |
1412 | } | |
1413 | if (error == GIT_ENOTFOUND) | |
1414 | error = 0; | |
1415 | ||
1416 | git_sortedcache_wunlock(backend->refcache); | |
1417 | ||
1418 | if (found) | |
1419 | error = packed_write(backend); | |
1420 | ||
1421 | cleanup: | |
1422 | return error; | |
1423 | } | |
1424 | ||
1425 | static int reflog_append(refdb_fs_backend *backend, const git_reference *ref, const git_oid *old, const git_oid *new, const git_signature *author, const char *message); | |
1426 | ||
1427 | static int cmp_old_ref(int *cmp, git_refdb_backend *backend, const char *name, | |
1428 | const git_oid *old_id, const char *old_target) | |
1429 | { | |
1430 | int error = 0; | |
1431 | git_reference *old_ref = NULL; | |
1432 | ||
1433 | *cmp = 0; | |
1434 | /* It "matches" if there is no old value to compare against */ | |
1435 | if (!old_id && !old_target) | |
1436 | return 0; | |
1437 | ||
1438 | if ((error = refdb_fs_backend__lookup(&old_ref, backend, name)) < 0) { | |
1439 | if (error == GIT_ENOTFOUND && old_id && git_oid_is_zero(old_id)) | |
1440 | return 0; | |
1441 | goto out; | |
1442 | } | |
1443 | ||
1444 | /* If the types don't match, there's no way the values do */ | |
1445 | if (old_id && old_ref->type != GIT_REFERENCE_DIRECT) { | |
1446 | *cmp = -1; | |
1447 | goto out; | |
1448 | } | |
1449 | if (old_target && old_ref->type != GIT_REFERENCE_SYMBOLIC) { | |
1450 | *cmp = 1; | |
1451 | goto out; | |
1452 | } | |
1453 | ||
1454 | if (old_id && old_ref->type == GIT_REFERENCE_DIRECT) | |
1455 | *cmp = git_oid_cmp(old_id, &old_ref->target.oid); | |
1456 | ||
1457 | if (old_target && old_ref->type == GIT_REFERENCE_SYMBOLIC) | |
1458 | *cmp = git__strcmp(old_target, old_ref->target.symbolic); | |
1459 | ||
1460 | out: | |
1461 | git_reference_free(old_ref); | |
1462 | ||
1463 | return error; | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * The git.git comment regarding this, for your viewing pleasure: | |
1468 | * | |
1469 | * Special hack: If a branch is updated directly and HEAD | |
1470 | * points to it (may happen on the remote side of a push | |
1471 | * for example) then logically the HEAD reflog should be | |
1472 | * updated too. | |
1473 | * A generic solution implies reverse symref information, | |
1474 | * but finding all symrefs pointing to the given branch | |
1475 | * would be rather costly for this rare event (the direct | |
1476 | * update of a branch) to be worth it. So let's cheat and | |
1477 | * check with HEAD only which should cover 99% of all usage | |
1478 | * scenarios (even 100% of the default ones). | |
1479 | */ | |
1480 | static int maybe_append_head(refdb_fs_backend *backend, const git_reference *ref, const git_signature *who, const char *message) | |
1481 | { | |
1482 | git_reference *head = NULL; | |
1483 | git_refdb *refdb = NULL; | |
1484 | int error, write_reflog; | |
1485 | git_oid old_id; | |
1486 | ||
1487 | if ((error = git_repository_refdb(&refdb, backend->repo)) < 0 || | |
1488 | (error = git_refdb_should_write_head_reflog(&write_reflog, refdb, ref)) < 0) | |
1489 | goto out; | |
1490 | if (!write_reflog) | |
1491 | goto out; | |
1492 | ||
1493 | /* if we can't resolve, we use {0}*40 as old id */ | |
1494 | if (git_reference_name_to_id(&old_id, backend->repo, ref->name) < 0) | |
1495 | memset(&old_id, 0, sizeof(old_id)); | |
1496 | ||
1497 | if ((error = git_reference_lookup(&head, backend->repo, GIT_HEAD_FILE)) < 0 || | |
1498 | (error = reflog_append(backend, head, &old_id, git_reference_target(ref), who, message)) < 0) | |
1499 | goto out; | |
1500 | ||
1501 | out: | |
1502 | git_reference_free(head); | |
1503 | git_refdb_free(refdb); | |
1504 | return error; | |
1505 | } | |
1506 | ||
1507 | static int refdb_fs_backend__write( | |
1508 | git_refdb_backend *_backend, | |
1509 | const git_reference *ref, | |
1510 | int force, | |
1511 | const git_signature *who, | |
1512 | const char *message, | |
1513 | const git_oid *old_id, | |
1514 | const char *old_target) | |
1515 | { | |
1516 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
1517 | git_filebuf file = GIT_FILEBUF_INIT; | |
1518 | int error = 0; | |
1519 | ||
1520 | GIT_ASSERT_ARG(backend); | |
1521 | ||
1522 | if ((error = reference_path_available(backend, ref->name, NULL, force)) < 0) | |
1523 | return error; | |
1524 | ||
1525 | /* We need to perform the reflog append and old value check under the ref's lock */ | |
1526 | if ((error = loose_lock(&file, backend, ref->name)) < 0) | |
1527 | return error; | |
1528 | ||
1529 | return refdb_fs_backend__write_tail(_backend, ref, &file, true, old_id, old_target, who, message); | |
1530 | } | |
1531 | ||
1532 | static int refdb_fs_backend__write_tail( | |
1533 | git_refdb_backend *_backend, | |
1534 | const git_reference *ref, | |
1535 | git_filebuf *file, | |
1536 | int update_reflog, | |
1537 | const git_oid *old_id, | |
1538 | const char *old_target, | |
1539 | const git_signature *who, | |
1540 | const char *message) | |
1541 | { | |
1542 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
1543 | int error = 0, cmp = 0, should_write; | |
1544 | const char *new_target = NULL; | |
1545 | const git_oid *new_id = NULL; | |
1546 | ||
1547 | if ((error = cmp_old_ref(&cmp, _backend, ref->name, old_id, old_target)) < 0) | |
1548 | goto on_error; | |
1549 | ||
1550 | if (cmp) { | |
1551 | git_error_set(GIT_ERROR_REFERENCE, "old reference value does not match"); | |
1552 | error = GIT_EMODIFIED; | |
1553 | goto on_error; | |
1554 | } | |
1555 | ||
1556 | if (ref->type == GIT_REFERENCE_SYMBOLIC) | |
1557 | new_target = ref->target.symbolic; | |
1558 | else | |
1559 | new_id = &ref->target.oid; | |
1560 | ||
1561 | error = cmp_old_ref(&cmp, _backend, ref->name, new_id, new_target); | |
1562 | if (error < 0 && error != GIT_ENOTFOUND) | |
1563 | goto on_error; | |
1564 | ||
1565 | /* Don't update if we have the same value */ | |
1566 | if (!error && !cmp) { | |
1567 | error = 0; | |
1568 | goto on_error; /* not really error */ | |
1569 | } | |
1570 | ||
1571 | if (update_reflog) { | |
1572 | git_refdb *refdb; | |
1573 | ||
1574 | if ((error = git_repository_refdb__weakptr(&refdb, backend->repo)) < 0 || | |
1575 | (error = git_refdb_should_write_reflog(&should_write, refdb, ref)) < 0) | |
1576 | goto on_error; | |
1577 | ||
1578 | if (should_write) { | |
1579 | if ((error = reflog_append(backend, ref, NULL, NULL, who, message)) < 0) | |
1580 | goto on_error; | |
1581 | if ((error = maybe_append_head(backend, ref, who, message)) < 0) | |
1582 | goto on_error; | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | return loose_commit(file, ref); | |
1587 | ||
1588 | on_error: | |
1589 | git_filebuf_cleanup(file); | |
1590 | return error; | |
1591 | } | |
1592 | ||
1593 | static int refdb_fs_backend__prune_refs( | |
1594 | refdb_fs_backend *backend, | |
1595 | const char *ref_name, | |
1596 | const char *prefix) | |
1597 | { | |
1598 | git_str relative_path = GIT_STR_INIT; | |
1599 | git_str base_path = GIT_STR_INIT; | |
1600 | size_t commonlen; | |
1601 | int error; | |
1602 | ||
1603 | GIT_ASSERT_ARG(backend); | |
1604 | GIT_ASSERT_ARG(ref_name); | |
1605 | ||
1606 | if ((error = git_str_sets(&relative_path, ref_name)) < 0) | |
1607 | goto cleanup; | |
1608 | ||
1609 | git_fs_path_squash_slashes(&relative_path); | |
1610 | if ((commonlen = git_fs_path_common_dirlen("refs/heads/", git_str_cstr(&relative_path))) == strlen("refs/heads/") || | |
1611 | (commonlen = git_fs_path_common_dirlen("refs/tags/", git_str_cstr(&relative_path))) == strlen("refs/tags/") || | |
1612 | (commonlen = git_fs_path_common_dirlen("refs/remotes/", git_str_cstr(&relative_path))) == strlen("refs/remotes/")) { | |
1613 | ||
1614 | git_str_truncate(&relative_path, commonlen); | |
1615 | ||
1616 | if (prefix) | |
1617 | error = git_str_join3(&base_path, '/', | |
1618 | backend->commonpath, prefix, | |
1619 | git_str_cstr(&relative_path)); | |
1620 | else | |
1621 | error = git_str_joinpath(&base_path, | |
1622 | backend->commonpath, | |
1623 | git_str_cstr(&relative_path)); | |
1624 | ||
1625 | if (!error) | |
1626 | error = git_path_validate_str_length(NULL, &base_path); | |
1627 | ||
1628 | if (error < 0) | |
1629 | goto cleanup; | |
1630 | ||
1631 | error = git_futils_rmdir_r(ref_name + commonlen, | |
1632 | git_str_cstr(&base_path), | |
1633 | GIT_RMDIR_EMPTY_PARENTS | GIT_RMDIR_SKIP_ROOT); | |
1634 | ||
1635 | if (error == GIT_ENOTFOUND) | |
1636 | error = 0; | |
1637 | } | |
1638 | ||
1639 | cleanup: | |
1640 | git_str_dispose(&relative_path); | |
1641 | git_str_dispose(&base_path); | |
1642 | return error; | |
1643 | } | |
1644 | ||
1645 | static int refdb_fs_backend__delete( | |
1646 | git_refdb_backend *_backend, | |
1647 | const char *ref_name, | |
1648 | const git_oid *old_id, const char *old_target) | |
1649 | { | |
1650 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
1651 | git_filebuf file = GIT_FILEBUF_INIT; | |
1652 | int error = 0; | |
1653 | ||
1654 | GIT_ASSERT_ARG(backend); | |
1655 | GIT_ASSERT_ARG(ref_name); | |
1656 | ||
1657 | if ((error = loose_lock(&file, backend, ref_name)) < 0) | |
1658 | return error; | |
1659 | ||
1660 | if ((error = refdb_reflog_fs__delete(_backend, ref_name)) < 0) { | |
1661 | git_filebuf_cleanup(&file); | |
1662 | return error; | |
1663 | } | |
1664 | ||
1665 | return refdb_fs_backend__delete_tail(_backend, &file, ref_name, old_id, old_target); | |
1666 | } | |
1667 | ||
1668 | static int loose_delete(refdb_fs_backend *backend, const char *ref_name) | |
1669 | { | |
1670 | git_str path = GIT_STR_INIT; | |
1671 | int error = 0; | |
1672 | ||
1673 | if ((error = loose_path(&path, backend->commonpath, ref_name)) < 0) | |
1674 | return error; | |
1675 | ||
1676 | error = p_unlink(path.ptr); | |
1677 | if (error < 0 && errno == ENOENT) | |
1678 | error = GIT_ENOTFOUND; | |
1679 | else if (error != 0) | |
1680 | error = -1; | |
1681 | ||
1682 | git_str_dispose(&path); | |
1683 | ||
1684 | return error; | |
1685 | } | |
1686 | ||
1687 | static int refdb_fs_backend__delete_tail( | |
1688 | git_refdb_backend *_backend, | |
1689 | git_filebuf *file, | |
1690 | const char *ref_name, | |
1691 | const git_oid *old_id, const char *old_target) | |
1692 | { | |
1693 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
1694 | int error = 0, cmp = 0; | |
1695 | bool packed_deleted = 0; | |
1696 | ||
1697 | error = cmp_old_ref(&cmp, _backend, ref_name, old_id, old_target); | |
1698 | if (error < 0) | |
1699 | goto cleanup; | |
1700 | ||
1701 | if (cmp) { | |
1702 | git_error_set(GIT_ERROR_REFERENCE, "old reference value does not match"); | |
1703 | error = GIT_EMODIFIED; | |
1704 | goto cleanup; | |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * To ensure that an external observer will see either the current ref value | |
1709 | * (because the loose ref still exists), or a missing ref (after the packed-file is | |
1710 | * unlocked, there will be nothing left), we must ensure things happen in the | |
1711 | * following order: | |
1712 | * | |
1713 | * - the packed-ref file is locked and loaded, as well as a loose one, if it exists | |
1714 | * - we optimistically delete a packed ref, keeping track of whether it existed | |
1715 | * - we delete the loose ref, note that we have its .lock | |
1716 | * - the loose ref is "unlocked", then the packed-ref file is rewritten and unlocked | |
1717 | * - we should prune the path components if a loose ref was deleted | |
1718 | * | |
1719 | * Note that, because our packed backend doesn't expose its filesystem lock, | |
1720 | * we might not be able to guarantee that this is what actually happens (ie. | |
1721 | * as our current code never write packed-refs.lock, nothing stops observers | |
1722 | * from grabbing a "stale" value from there). | |
1723 | */ | |
1724 | if ((error = packed_delete(backend, ref_name)) < 0 && error != GIT_ENOTFOUND) | |
1725 | goto cleanup; | |
1726 | ||
1727 | if (error == 0) | |
1728 | packed_deleted = 1; | |
1729 | ||
1730 | if ((error = loose_delete(backend, ref_name)) < 0 && error != GIT_ENOTFOUND) | |
1731 | goto cleanup; | |
1732 | ||
1733 | if (error == GIT_ENOTFOUND) { | |
1734 | error = packed_deleted ? 0 : ref_error_notfound(ref_name); | |
1735 | goto cleanup; | |
1736 | } | |
1737 | ||
1738 | cleanup: | |
1739 | git_filebuf_cleanup(file); | |
1740 | if (error == 0) | |
1741 | error = refdb_fs_backend__prune_refs(backend, ref_name, ""); | |
1742 | return error; | |
1743 | } | |
1744 | ||
1745 | static int refdb_reflog_fs__rename(git_refdb_backend *_backend, const char *old_name, const char *new_name); | |
1746 | ||
1747 | static int refdb_fs_backend__rename( | |
1748 | git_reference **out, | |
1749 | git_refdb_backend *_backend, | |
1750 | const char *old_name, | |
1751 | const char *new_name, | |
1752 | int force, | |
1753 | const git_signature *who, | |
1754 | const char *message) | |
1755 | { | |
1756 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
1757 | git_reference *old, *new = NULL; | |
1758 | git_filebuf file = GIT_FILEBUF_INIT; | |
1759 | int error; | |
1760 | ||
1761 | GIT_ASSERT_ARG(backend); | |
1762 | ||
1763 | if ((error = reference_path_available( | |
1764 | backend, new_name, old_name, force)) < 0 || | |
1765 | (error = refdb_fs_backend__lookup(&old, _backend, old_name)) < 0) | |
1766 | return error; | |
1767 | ||
1768 | if ((error = refdb_fs_backend__delete(_backend, old_name, NULL, NULL)) < 0) { | |
1769 | git_reference_free(old); | |
1770 | return error; | |
1771 | } | |
1772 | ||
1773 | new = git_reference__realloc(&old, new_name); | |
1774 | if (!new) { | |
1775 | git_reference_free(old); | |
1776 | return -1; | |
1777 | } | |
1778 | ||
1779 | if ((error = loose_lock(&file, backend, new->name)) < 0) { | |
1780 | git_reference_free(new); | |
1781 | return error; | |
1782 | } | |
1783 | ||
1784 | /* Try to rename the refog; it's ok if the old doesn't exist */ | |
1785 | error = refdb_reflog_fs__rename(_backend, old_name, new_name); | |
1786 | if (((error == 0) || (error == GIT_ENOTFOUND)) && | |
1787 | ((error = reflog_append(backend, new, git_reference_target(new), NULL, who, message)) < 0)) { | |
1788 | git_reference_free(new); | |
1789 | git_filebuf_cleanup(&file); | |
1790 | return error; | |
1791 | } | |
1792 | ||
1793 | if (error < 0) { | |
1794 | git_reference_free(new); | |
1795 | git_filebuf_cleanup(&file); | |
1796 | return error; | |
1797 | } | |
1798 | ||
1799 | ||
1800 | if ((error = loose_commit(&file, new)) < 0 || out == NULL) { | |
1801 | git_reference_free(new); | |
1802 | return error; | |
1803 | } | |
1804 | ||
1805 | *out = new; | |
1806 | return 0; | |
1807 | } | |
1808 | ||
1809 | static int refdb_fs_backend__compress(git_refdb_backend *_backend) | |
1810 | { | |
1811 | int error; | |
1812 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
1813 | ||
1814 | GIT_ASSERT_ARG(backend); | |
1815 | ||
1816 | if ((error = packed_reload(backend)) < 0 || /* load the existing packfile */ | |
1817 | (error = packed_loadloose(backend)) < 0 || /* add all the loose refs */ | |
1818 | (error = packed_write(backend)) < 0) /* write back to disk */ | |
1819 | return error; | |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | ||
1824 | static void refdb_fs_backend__free(git_refdb_backend *_backend) | |
1825 | { | |
1826 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
1827 | ||
1828 | if (!backend) | |
1829 | return; | |
1830 | ||
1831 | git_sortedcache_free(backend->refcache); | |
1832 | ||
1833 | git_mutex_lock(&backend->prlock); | |
1834 | packed_map_free(backend); | |
1835 | git_mutex_unlock(&backend->prlock); | |
1836 | git_mutex_free(&backend->prlock); | |
1837 | ||
1838 | git__free(backend->gitpath); | |
1839 | git__free(backend->commonpath); | |
1840 | git__free(backend); | |
1841 | } | |
1842 | ||
1843 | static char *setup_namespace(git_repository *repo, const char *in) | |
1844 | { | |
1845 | git_str path = GIT_STR_INIT; | |
1846 | char *parts, *start, *end, *out = NULL; | |
1847 | ||
1848 | if (!in) | |
1849 | goto done; | |
1850 | ||
1851 | git_str_puts(&path, in); | |
1852 | ||
1853 | /* if the repo is not namespaced, nothing else to do */ | |
1854 | if (repo->namespace == NULL) { | |
1855 | out = git_str_detach(&path); | |
1856 | goto done; | |
1857 | } | |
1858 | ||
1859 | parts = end = git__strdup(repo->namespace); | |
1860 | if (parts == NULL) | |
1861 | goto done; | |
1862 | ||
1863 | /* | |
1864 | * From `man gitnamespaces`: | |
1865 | * namespaces which include a / will expand to a hierarchy | |
1866 | * of namespaces; for example, GIT_NAMESPACE=foo/bar will store | |
1867 | * refs under refs/namespaces/foo/refs/namespaces/bar/ | |
1868 | */ | |
1869 | while ((start = git__strsep(&end, "/")) != NULL) | |
1870 | git_str_printf(&path, "refs/namespaces/%s/", start); | |
1871 | ||
1872 | git_str_printf(&path, "refs/namespaces/%s/refs", end); | |
1873 | git__free(parts); | |
1874 | ||
1875 | /* Make sure that the folder with the namespace exists */ | |
1876 | if (git_futils_mkdir_relative(git_str_cstr(&path), in, 0777, | |
1877 | GIT_MKDIR_PATH, NULL) < 0) | |
1878 | goto done; | |
1879 | ||
1880 | /* Return root of the namespaced gitpath, i.e. without the trailing 'refs' */ | |
1881 | git_str_rtruncate_at_char(&path, '/'); | |
1882 | git_str_putc(&path, '/'); | |
1883 | out = git_str_detach(&path); | |
1884 | ||
1885 | done: | |
1886 | git_str_dispose(&path); | |
1887 | return out; | |
1888 | } | |
1889 | ||
1890 | static int reflog_alloc(git_reflog **reflog, const char *name) | |
1891 | { | |
1892 | git_reflog *log; | |
1893 | ||
1894 | *reflog = NULL; | |
1895 | ||
1896 | log = git__calloc(1, sizeof(git_reflog)); | |
1897 | GIT_ERROR_CHECK_ALLOC(log); | |
1898 | ||
1899 | log->ref_name = git__strdup(name); | |
1900 | GIT_ERROR_CHECK_ALLOC(log->ref_name); | |
1901 | ||
1902 | if (git_vector_init(&log->entries, 0, NULL) < 0) { | |
1903 | git__free(log->ref_name); | |
1904 | git__free(log); | |
1905 | return -1; | |
1906 | } | |
1907 | ||
1908 | *reflog = log; | |
1909 | ||
1910 | return 0; | |
1911 | } | |
1912 | ||
1913 | static int reflog_parse(git_reflog *log, const char *buf, size_t buf_size) | |
1914 | { | |
1915 | git_parse_ctx parser = GIT_PARSE_CTX_INIT; | |
1916 | ||
1917 | if ((git_parse_ctx_init(&parser, buf, buf_size)) < 0) | |
1918 | return -1; | |
1919 | ||
1920 | for (; parser.remain_len; git_parse_advance_line(&parser)) { | |
1921 | git_reflog_entry *entry; | |
1922 | const char *sig; | |
1923 | char c; | |
1924 | ||
1925 | entry = git__calloc(1, sizeof(*entry)); | |
1926 | GIT_ERROR_CHECK_ALLOC(entry); | |
1927 | entry->committer = git__calloc(1, sizeof(*entry->committer)); | |
1928 | GIT_ERROR_CHECK_ALLOC(entry->committer); | |
1929 | ||
1930 | if (git_parse_advance_oid(&entry->oid_old, &parser) < 0 || | |
1931 | git_parse_advance_expected(&parser, " ", 1) < 0 || | |
1932 | git_parse_advance_oid(&entry->oid_cur, &parser) < 0) | |
1933 | goto next; | |
1934 | ||
1935 | sig = parser.line; | |
1936 | while (git_parse_peek(&c, &parser, 0) == 0 && c != '\t' && c != '\n') | |
1937 | git_parse_advance_chars(&parser, 1); | |
1938 | ||
1939 | if (git_signature__parse(entry->committer, &sig, parser.line, NULL, 0) < 0) | |
1940 | goto next; | |
1941 | ||
1942 | if (c == '\t') { | |
1943 | size_t len; | |
1944 | git_parse_advance_chars(&parser, 1); | |
1945 | ||
1946 | len = parser.line_len; | |
1947 | if (parser.line[len - 1] == '\n') | |
1948 | len--; | |
1949 | ||
1950 | entry->msg = git__strndup(parser.line, len); | |
1951 | GIT_ERROR_CHECK_ALLOC(entry->msg); | |
1952 | } | |
1953 | ||
1954 | if ((git_vector_insert(&log->entries, entry)) < 0) { | |
1955 | git_reflog_entry__free(entry); | |
1956 | return -1; | |
1957 | } | |
1958 | ||
1959 | continue; | |
1960 | ||
1961 | next: | |
1962 | git_reflog_entry__free(entry); | |
1963 | } | |
1964 | ||
1965 | return 0; | |
1966 | } | |
1967 | ||
1968 | static int create_new_reflog_file(const char *filepath) | |
1969 | { | |
1970 | int fd, error; | |
1971 | ||
1972 | if ((error = git_futils_mkpath2file(filepath, GIT_REFLOG_DIR_MODE)) < 0) | |
1973 | return error; | |
1974 | ||
1975 | if ((fd = p_open(filepath, | |
1976 | O_WRONLY | O_CREAT, | |
1977 | GIT_REFLOG_FILE_MODE)) < 0) | |
1978 | return -1; | |
1979 | ||
1980 | return p_close(fd); | |
1981 | } | |
1982 | ||
1983 | static int refdb_reflog_fs__ensure_log(git_refdb_backend *_backend, const char *name) | |
1984 | { | |
1985 | refdb_fs_backend *backend; | |
1986 | git_repository *repo; | |
1987 | git_str path = GIT_STR_INIT; | |
1988 | int error; | |
1989 | ||
1990 | GIT_ASSERT_ARG(_backend && name); | |
1991 | ||
1992 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
1993 | repo = backend->repo; | |
1994 | ||
1995 | if ((error = reflog_path(&path, repo, name)) < 0) | |
1996 | return error; | |
1997 | ||
1998 | error = create_new_reflog_file(git_str_cstr(&path)); | |
1999 | git_str_dispose(&path); | |
2000 | ||
2001 | return error; | |
2002 | } | |
2003 | ||
2004 | static int has_reflog(git_repository *repo, const char *name) | |
2005 | { | |
2006 | int ret = 0; | |
2007 | git_str path = GIT_STR_INIT; | |
2008 | ||
2009 | if (reflog_path(&path, repo, name) < 0) | |
2010 | goto cleanup; | |
2011 | ||
2012 | ret = git_fs_path_isfile(git_str_cstr(&path)); | |
2013 | ||
2014 | cleanup: | |
2015 | git_str_dispose(&path); | |
2016 | return ret; | |
2017 | } | |
2018 | ||
2019 | static int refdb_reflog_fs__has_log(git_refdb_backend *_backend, const char *name) | |
2020 | { | |
2021 | refdb_fs_backend *backend; | |
2022 | ||
2023 | GIT_ASSERT_ARG(_backend); | |
2024 | GIT_ASSERT_ARG(name); | |
2025 | ||
2026 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
2027 | ||
2028 | return has_reflog(backend->repo, name); | |
2029 | } | |
2030 | ||
2031 | static int refdb_reflog_fs__read(git_reflog **out, git_refdb_backend *_backend, const char *name) | |
2032 | { | |
2033 | int error = -1; | |
2034 | git_str log_path = GIT_STR_INIT; | |
2035 | git_str log_file = GIT_STR_INIT; | |
2036 | git_reflog *log = NULL; | |
2037 | git_repository *repo; | |
2038 | refdb_fs_backend *backend; | |
2039 | ||
2040 | GIT_ASSERT_ARG(out); | |
2041 | GIT_ASSERT_ARG(_backend); | |
2042 | GIT_ASSERT_ARG(name); | |
2043 | ||
2044 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
2045 | repo = backend->repo; | |
2046 | ||
2047 | if (reflog_alloc(&log, name) < 0) | |
2048 | return -1; | |
2049 | ||
2050 | if (reflog_path(&log_path, repo, name) < 0) | |
2051 | goto cleanup; | |
2052 | ||
2053 | error = git_futils_readbuffer(&log_file, git_str_cstr(&log_path)); | |
2054 | if (error < 0 && error != GIT_ENOTFOUND) | |
2055 | goto cleanup; | |
2056 | ||
2057 | if ((error == GIT_ENOTFOUND) && | |
2058 | ((error = create_new_reflog_file(git_str_cstr(&log_path))) < 0)) | |
2059 | goto cleanup; | |
2060 | ||
2061 | if ((error = reflog_parse(log, | |
2062 | git_str_cstr(&log_file), git_str_len(&log_file))) < 0) | |
2063 | goto cleanup; | |
2064 | ||
2065 | *out = log; | |
2066 | goto success; | |
2067 | ||
2068 | cleanup: | |
2069 | git_reflog_free(log); | |
2070 | ||
2071 | success: | |
2072 | git_str_dispose(&log_file); | |
2073 | git_str_dispose(&log_path); | |
2074 | ||
2075 | return error; | |
2076 | } | |
2077 | ||
2078 | static int serialize_reflog_entry( | |
2079 | git_str *buf, | |
2080 | const git_oid *oid_old, | |
2081 | const git_oid *oid_new, | |
2082 | const git_signature *committer, | |
2083 | const char *msg) | |
2084 | { | |
2085 | char raw_old[GIT_OID_HEXSZ+1]; | |
2086 | char raw_new[GIT_OID_HEXSZ+1]; | |
2087 | ||
2088 | git_oid_tostr(raw_old, GIT_OID_HEXSZ+1, oid_old); | |
2089 | git_oid_tostr(raw_new, GIT_OID_HEXSZ+1, oid_new); | |
2090 | ||
2091 | git_str_clear(buf); | |
2092 | ||
2093 | git_str_puts(buf, raw_old); | |
2094 | git_str_putc(buf, ' '); | |
2095 | git_str_puts(buf, raw_new); | |
2096 | ||
2097 | git_signature__writebuf(buf, " ", committer); | |
2098 | ||
2099 | /* drop trailing LF */ | |
2100 | git_str_rtrim(buf); | |
2101 | ||
2102 | if (msg) { | |
2103 | size_t i; | |
2104 | ||
2105 | git_str_putc(buf, '\t'); | |
2106 | git_str_puts(buf, msg); | |
2107 | ||
2108 | for (i = 0; i < buf->size - 2; i++) | |
2109 | if (buf->ptr[i] == '\n') | |
2110 | buf->ptr[i] = ' '; | |
2111 | git_str_rtrim(buf); | |
2112 | } | |
2113 | ||
2114 | git_str_putc(buf, '\n'); | |
2115 | ||
2116 | return git_str_oom(buf); | |
2117 | } | |
2118 | ||
2119 | static int lock_reflog(git_filebuf *file, refdb_fs_backend *backend, const char *refname) | |
2120 | { | |
2121 | git_repository *repo; | |
2122 | git_str log_path = GIT_STR_INIT; | |
2123 | int error; | |
2124 | ||
2125 | repo = backend->repo; | |
2126 | ||
2127 | if (!git_path_is_valid(backend->repo, refname, 0, GIT_FS_PATH_REJECT_FILESYSTEM_DEFAULTS)) { | |
2128 | git_error_set(GIT_ERROR_INVALID, "invalid reference name '%s'", refname); | |
2129 | return GIT_EINVALIDSPEC; | |
2130 | } | |
2131 | ||
2132 | if (reflog_path(&log_path, repo, refname) < 0) | |
2133 | return -1; | |
2134 | ||
2135 | if (!git_fs_path_isfile(git_str_cstr(&log_path))) { | |
2136 | git_error_set(GIT_ERROR_INVALID, | |
2137 | "log file for reference '%s' doesn't exist", refname); | |
2138 | error = -1; | |
2139 | goto cleanup; | |
2140 | } | |
2141 | ||
2142 | error = git_filebuf_open(file, git_str_cstr(&log_path), 0, GIT_REFLOG_FILE_MODE); | |
2143 | ||
2144 | cleanup: | |
2145 | git_str_dispose(&log_path); | |
2146 | ||
2147 | return error; | |
2148 | } | |
2149 | ||
2150 | static int refdb_reflog_fs__write(git_refdb_backend *_backend, git_reflog *reflog) | |
2151 | { | |
2152 | int error = -1; | |
2153 | unsigned int i; | |
2154 | git_reflog_entry *entry; | |
2155 | refdb_fs_backend *backend; | |
2156 | git_str log = GIT_STR_INIT; | |
2157 | git_filebuf fbuf = GIT_FILEBUF_INIT; | |
2158 | ||
2159 | GIT_ASSERT_ARG(_backend); | |
2160 | GIT_ASSERT_ARG(reflog); | |
2161 | ||
2162 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
2163 | ||
2164 | if ((error = lock_reflog(&fbuf, backend, reflog->ref_name)) < 0) | |
2165 | return -1; | |
2166 | ||
2167 | git_vector_foreach(&reflog->entries, i, entry) { | |
2168 | if (serialize_reflog_entry(&log, &(entry->oid_old), &(entry->oid_cur), entry->committer, entry->msg) < 0) | |
2169 | goto cleanup; | |
2170 | ||
2171 | if ((error = git_filebuf_write(&fbuf, log.ptr, log.size)) < 0) | |
2172 | goto cleanup; | |
2173 | } | |
2174 | ||
2175 | error = git_filebuf_commit(&fbuf); | |
2176 | goto success; | |
2177 | ||
2178 | cleanup: | |
2179 | git_filebuf_cleanup(&fbuf); | |
2180 | ||
2181 | success: | |
2182 | git_str_dispose(&log); | |
2183 | ||
2184 | return error; | |
2185 | } | |
2186 | ||
2187 | /* Append to the reflog, must be called under reference lock */ | |
2188 | static int reflog_append(refdb_fs_backend *backend, const git_reference *ref, const git_oid *old, const git_oid *new, const git_signature *who, const char *message) | |
2189 | { | |
2190 | int error, is_symbolic, open_flags; | |
2191 | git_oid old_id = {{0}}, new_id = {{0}}; | |
2192 | git_str buf = GIT_STR_INIT, path = GIT_STR_INIT; | |
2193 | git_repository *repo = backend->repo; | |
2194 | ||
2195 | is_symbolic = ref->type == GIT_REFERENCE_SYMBOLIC; | |
2196 | ||
2197 | /* "normal" symbolic updates do not write */ | |
2198 | if (is_symbolic && | |
2199 | strcmp(ref->name, GIT_HEAD_FILE) && | |
2200 | !(old && new)) | |
2201 | return 0; | |
2202 | ||
2203 | /* From here on is_symbolic also means that it's HEAD */ | |
2204 | ||
2205 | if (old) { | |
2206 | git_oid_cpy(&old_id, old); | |
2207 | } else { | |
2208 | error = git_reference_name_to_id(&old_id, repo, ref->name); | |
2209 | if (error < 0 && error != GIT_ENOTFOUND) | |
2210 | return error; | |
2211 | } | |
2212 | ||
2213 | if (new) { | |
2214 | git_oid_cpy(&new_id, new); | |
2215 | } else { | |
2216 | if (!is_symbolic) { | |
2217 | git_oid_cpy(&new_id, git_reference_target(ref)); | |
2218 | } else { | |
2219 | error = git_reference_name_to_id(&new_id, repo, git_reference_symbolic_target(ref)); | |
2220 | if (error < 0 && error != GIT_ENOTFOUND) | |
2221 | return error; | |
2222 | /* detaching HEAD does not create an entry */ | |
2223 | if (error == GIT_ENOTFOUND) | |
2224 | return 0; | |
2225 | ||
2226 | git_error_clear(); | |
2227 | } | |
2228 | } | |
2229 | ||
2230 | if ((error = serialize_reflog_entry(&buf, &old_id, &new_id, who, message)) < 0) | |
2231 | goto cleanup; | |
2232 | ||
2233 | if ((error = reflog_path(&path, repo, ref->name)) < 0) | |
2234 | goto cleanup; | |
2235 | ||
2236 | if (((error = git_futils_mkpath2file(git_str_cstr(&path), 0777)) < 0) && | |
2237 | (error != GIT_EEXISTS)) { | |
2238 | goto cleanup; | |
2239 | } | |
2240 | ||
2241 | /* If the new branch matches part of the namespace of a previously deleted branch, | |
2242 | * there maybe an obsolete/unused directory (or directory hierarchy) in the way. | |
2243 | */ | |
2244 | if (git_fs_path_isdir(git_str_cstr(&path))) { | |
2245 | if ((error = git_futils_rmdir_r(git_str_cstr(&path), NULL, GIT_RMDIR_SKIP_NONEMPTY)) < 0) { | |
2246 | if (error == GIT_ENOTFOUND) | |
2247 | error = 0; | |
2248 | } else if (git_fs_path_isdir(git_str_cstr(&path))) { | |
2249 | git_error_set(GIT_ERROR_REFERENCE, "cannot create reflog at '%s', there are reflogs beneath that folder", | |
2250 | ref->name); | |
2251 | error = GIT_EDIRECTORY; | |
2252 | } | |
2253 | ||
2254 | if (error != 0) | |
2255 | goto cleanup; | |
2256 | } | |
2257 | ||
2258 | open_flags = O_WRONLY | O_CREAT | O_APPEND; | |
2259 | ||
2260 | if (backend->fsync) | |
2261 | open_flags |= O_FSYNC; | |
2262 | ||
2263 | error = git_futils_writebuffer(&buf, git_str_cstr(&path), open_flags, GIT_REFLOG_FILE_MODE); | |
2264 | ||
2265 | cleanup: | |
2266 | git_str_dispose(&buf); | |
2267 | git_str_dispose(&path); | |
2268 | ||
2269 | return error; | |
2270 | } | |
2271 | ||
2272 | static int refdb_reflog_fs__rename(git_refdb_backend *_backend, const char *old_name, const char *new_name) | |
2273 | { | |
2274 | int error = 0, fd; | |
2275 | git_str old_path = GIT_STR_INIT; | |
2276 | git_str new_path = GIT_STR_INIT; | |
2277 | git_str temp_path = GIT_STR_INIT; | |
2278 | git_str normalized = GIT_STR_INIT; | |
2279 | git_repository *repo; | |
2280 | refdb_fs_backend *backend; | |
2281 | ||
2282 | GIT_ASSERT_ARG(_backend); | |
2283 | GIT_ASSERT_ARG(old_name); | |
2284 | GIT_ASSERT_ARG(new_name); | |
2285 | ||
2286 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
2287 | repo = backend->repo; | |
2288 | ||
2289 | if ((error = git_reference__normalize_name( | |
2290 | &normalized, new_name, GIT_REFERENCE_FORMAT_ALLOW_ONELEVEL)) < 0) | |
2291 | return error; | |
2292 | ||
2293 | if (git_str_joinpath(&temp_path, repo->gitdir, GIT_REFLOG_DIR) < 0) | |
2294 | return -1; | |
2295 | ||
2296 | if ((error = loose_path(&old_path, git_str_cstr(&temp_path), old_name)) < 0) | |
2297 | return error; | |
2298 | ||
2299 | if ((error = loose_path(&new_path, git_str_cstr(&temp_path), git_str_cstr(&normalized))) < 0) | |
2300 | return error; | |
2301 | ||
2302 | if (!git_fs_path_exists(git_str_cstr(&old_path))) { | |
2303 | error = GIT_ENOTFOUND; | |
2304 | goto cleanup; | |
2305 | } | |
2306 | ||
2307 | /* | |
2308 | * Move the reflog to a temporary place. This two-phase renaming is required | |
2309 | * in order to cope with funny renaming use cases when one tries to move a reference | |
2310 | * to a partially colliding namespace: | |
2311 | * - a/b -> a/b/c | |
2312 | * - a/b/c/d -> a/b/c | |
2313 | */ | |
2314 | if ((error = loose_path(&temp_path, git_str_cstr(&temp_path), "temp_reflog")) < 0) | |
2315 | return error; | |
2316 | ||
2317 | if ((fd = git_futils_mktmp(&temp_path, git_str_cstr(&temp_path), GIT_REFLOG_FILE_MODE)) < 0) { | |
2318 | error = -1; | |
2319 | goto cleanup; | |
2320 | } | |
2321 | ||
2322 | p_close(fd); | |
2323 | ||
2324 | if (p_rename(git_str_cstr(&old_path), git_str_cstr(&temp_path)) < 0) { | |
2325 | git_error_set(GIT_ERROR_OS, "failed to rename reflog for %s", new_name); | |
2326 | error = -1; | |
2327 | goto cleanup; | |
2328 | } | |
2329 | ||
2330 | if (git_fs_path_isdir(git_str_cstr(&new_path)) && | |
2331 | (git_futils_rmdir_r(git_str_cstr(&new_path), NULL, GIT_RMDIR_SKIP_NONEMPTY) < 0)) { | |
2332 | error = -1; | |
2333 | goto cleanup; | |
2334 | } | |
2335 | ||
2336 | if (git_futils_mkpath2file(git_str_cstr(&new_path), GIT_REFLOG_DIR_MODE) < 0) { | |
2337 | error = -1; | |
2338 | goto cleanup; | |
2339 | } | |
2340 | ||
2341 | if (p_rename(git_str_cstr(&temp_path), git_str_cstr(&new_path)) < 0) { | |
2342 | git_error_set(GIT_ERROR_OS, "failed to rename reflog for %s", new_name); | |
2343 | error = -1; | |
2344 | } | |
2345 | ||
2346 | cleanup: | |
2347 | git_str_dispose(&temp_path); | |
2348 | git_str_dispose(&old_path); | |
2349 | git_str_dispose(&new_path); | |
2350 | git_str_dispose(&normalized); | |
2351 | ||
2352 | return error; | |
2353 | } | |
2354 | ||
2355 | static int refdb_reflog_fs__delete(git_refdb_backend *_backend, const char *name) | |
2356 | { | |
2357 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); | |
2358 | git_str path = GIT_STR_INIT; | |
2359 | int error; | |
2360 | ||
2361 | GIT_ASSERT_ARG(_backend); | |
2362 | GIT_ASSERT_ARG(name); | |
2363 | ||
2364 | if ((error = reflog_path(&path, backend->repo, name)) < 0) | |
2365 | goto out; | |
2366 | ||
2367 | if (!git_fs_path_exists(path.ptr)) | |
2368 | goto out; | |
2369 | ||
2370 | if ((error = p_unlink(path.ptr)) < 0) | |
2371 | goto out; | |
2372 | ||
2373 | error = refdb_fs_backend__prune_refs(backend, name, GIT_REFLOG_DIR); | |
2374 | ||
2375 | out: | |
2376 | git_str_dispose(&path); | |
2377 | ||
2378 | return error; | |
2379 | } | |
2380 | ||
2381 | int git_refdb_backend_fs( | |
2382 | git_refdb_backend **backend_out, | |
2383 | git_repository *repository) | |
2384 | { | |
2385 | int t = 0; | |
2386 | git_str gitpath = GIT_STR_INIT; | |
2387 | refdb_fs_backend *backend; | |
2388 | ||
2389 | backend = git__calloc(1, sizeof(refdb_fs_backend)); | |
2390 | GIT_ERROR_CHECK_ALLOC(backend); | |
2391 | if (git_mutex_init(&backend->prlock) < 0) { | |
2392 | git__free(backend); | |
2393 | return -1; | |
2394 | } | |
2395 | ||
2396 | ||
2397 | if (git_refdb_init_backend(&backend->parent, GIT_REFDB_BACKEND_VERSION) < 0) | |
2398 | goto fail; | |
2399 | ||
2400 | backend->repo = repository; | |
2401 | ||
2402 | if (repository->gitdir) { | |
2403 | backend->gitpath = setup_namespace(repository, repository->gitdir); | |
2404 | ||
2405 | if (backend->gitpath == NULL) | |
2406 | goto fail; | |
2407 | } | |
2408 | ||
2409 | if (repository->commondir) { | |
2410 | backend->commonpath = setup_namespace(repository, repository->commondir); | |
2411 | ||
2412 | if (backend->commonpath == NULL) | |
2413 | goto fail; | |
2414 | } | |
2415 | ||
2416 | if (git_str_joinpath(&gitpath, backend->commonpath, GIT_PACKEDREFS_FILE) < 0 || | |
2417 | git_sortedcache_new( | |
2418 | &backend->refcache, offsetof(struct packref, name), | |
2419 | NULL, NULL, packref_cmp, git_str_cstr(&gitpath)) < 0) | |
2420 | goto fail; | |
2421 | ||
2422 | git_str_dispose(&gitpath); | |
2423 | ||
2424 | if (!git_repository__configmap_lookup(&t, backend->repo, GIT_CONFIGMAP_IGNORECASE) && t) { | |
2425 | backend->iterator_flags |= GIT_ITERATOR_IGNORE_CASE; | |
2426 | backend->direach_flags |= GIT_FS_PATH_DIR_IGNORE_CASE; | |
2427 | } | |
2428 | if (!git_repository__configmap_lookup(&t, backend->repo, GIT_CONFIGMAP_PRECOMPOSE) && t) { | |
2429 | backend->iterator_flags |= GIT_ITERATOR_PRECOMPOSE_UNICODE; | |
2430 | backend->direach_flags |= GIT_FS_PATH_DIR_PRECOMPOSE_UNICODE; | |
2431 | } | |
2432 | if ((!git_repository__configmap_lookup(&t, backend->repo, GIT_CONFIGMAP_FSYNCOBJECTFILES) && t) || | |
2433 | git_repository__fsync_gitdir) | |
2434 | backend->fsync = 1; | |
2435 | backend->iterator_flags |= GIT_ITERATOR_DESCEND_SYMLINKS; | |
2436 | ||
2437 | backend->parent.exists = &refdb_fs_backend__exists; | |
2438 | backend->parent.lookup = &refdb_fs_backend__lookup; | |
2439 | backend->parent.iterator = &refdb_fs_backend__iterator; | |
2440 | backend->parent.write = &refdb_fs_backend__write; | |
2441 | backend->parent.del = &refdb_fs_backend__delete; | |
2442 | backend->parent.rename = &refdb_fs_backend__rename; | |
2443 | backend->parent.compress = &refdb_fs_backend__compress; | |
2444 | backend->parent.lock = &refdb_fs_backend__lock; | |
2445 | backend->parent.unlock = &refdb_fs_backend__unlock; | |
2446 | backend->parent.has_log = &refdb_reflog_fs__has_log; | |
2447 | backend->parent.ensure_log = &refdb_reflog_fs__ensure_log; | |
2448 | backend->parent.free = &refdb_fs_backend__free; | |
2449 | backend->parent.reflog_read = &refdb_reflog_fs__read; | |
2450 | backend->parent.reflog_write = &refdb_reflog_fs__write; | |
2451 | backend->parent.reflog_rename = &refdb_reflog_fs__rename; | |
2452 | backend->parent.reflog_delete = &refdb_reflog_fs__delete; | |
2453 | ||
2454 | *backend_out = (git_refdb_backend *)backend; | |
2455 | return 0; | |
2456 | ||
2457 | fail: | |
2458 | git_mutex_free(&backend->prlock); | |
2459 | git_str_dispose(&gitpath); | |
2460 | git__free(backend->gitpath); | |
2461 | git__free(backend->commonpath); | |
2462 | git__free(backend); | |
2463 | return -1; | |
2464 | } |