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Commit | Line | Data |
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d00d5464 ET |
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" | |
22a2d3d5 | 11 | #include "futils.h" |
114f5a6c | 12 | #include "filebuf.h" |
d00d5464 | 13 | #include "pack.h" |
22a2d3d5 | 14 | #include "parse.h" |
d00d5464 | 15 | #include "reflog.h" |
d00d5464 | 16 | #include "refdb.h" |
4def7035 | 17 | #include "iterator.h" |
fe372740 | 18 | #include "sortedcache.h" |
b976f3c2 | 19 | #include "signature.h" |
22a2d3d5 | 20 | #include "wildmatch.h" |
e579e0f7 | 21 | #include "path.h" |
d00d5464 ET |
22 | |
23 | #include <git2/tag.h> | |
24 | #include <git2/object.h> | |
25 | #include <git2/refdb.h> | |
4b7e1b9e | 26 | #include <git2/branch.h> |
4dcd8780 | 27 | #include <git2/sys/refdb_backend.h> |
21ca0451 | 28 | #include <git2/sys/refs.h> |
b976f3c2 | 29 | #include <git2/sys/reflog.h> |
d00d5464 | 30 | |
d00d5464 ET |
31 | #define DEFAULT_NESTING_LEVEL 5 |
32 | #define MAX_NESTING_LEVEL 10 | |
33 | ||
34 | enum { | |
f69db390 VM |
35 | PACKREF_HAS_PEEL = 1, |
36 | PACKREF_WAS_LOOSE = 2, | |
2638a03a | 37 | PACKREF_CANNOT_PEEL = 4, |
e579e0f7 | 38 | PACKREF_SHADOWED = 8 |
f69db390 VM |
39 | }; |
40 | ||
41 | enum { | |
42 | PEELING_NONE = 0, | |
43 | PEELING_STANDARD, | |
44 | PEELING_FULL | |
d00d5464 ET |
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; | |
71dd0861 PS |
58 | /* path to git directory */ |
59 | char *gitpath; | |
e0a6c28e PS |
60 | /* path to common objects' directory */ |
61 | char *commonpath; | |
d00d5464 | 62 | |
fe372740 | 63 | git_sortedcache *refcache; |
f69db390 | 64 | int peeling_mode; |
219d3457 RB |
65 | git_iterator_flag_t iterator_flags; |
66 | uint32_t direach_flags; | |
1c04a96b | 67 | int fsync; |
e579e0f7 MB |
68 | git_map packed_refs_map; |
69 | git_mutex prlock; /* protect packed_refs_map */ | |
70 | git_futils_filestamp packed_refs_stamp; | |
71 | bool sorted; | |
d00d5464 ET |
72 | } refdb_fs_backend; |
73 | ||
01d0c02d | 74 | static int refdb_reflog_fs__delete(git_refdb_backend *_backend, const char *name); |
e579e0f7 | 75 | static char *packed_set_peeling_mode(char *data, size_t data_sz, refdb_fs_backend *backend); |
01d0c02d | 76 | |
c25aa7cd | 77 | GIT_INLINE(int) loose_path( |
e579e0f7 | 78 | git_str *out, |
c25aa7cd PP |
79 | const char *base, |
80 | const char *refname) | |
81 | { | |
e579e0f7 | 82 | if (git_str_joinpath(out, base, refname) < 0) |
c25aa7cd PP |
83 | return -1; |
84 | ||
e579e0f7 | 85 | return git_fs_path_validate_str_length_with_suffix(out, |
c25aa7cd PP |
86 | CONST_STRLEN(".lock")); |
87 | } | |
88 | ||
89 | GIT_INLINE(int) reflog_path( | |
e579e0f7 | 90 | git_str *out, |
c25aa7cd PP |
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 | ||
e579e0f7 | 100 | if ((error = git_str_joinpath(out, base, GIT_REFLOG_DIR)) < 0) |
c25aa7cd PP |
101 | return error; |
102 | ||
103 | return loose_path(out, out->ptr, refname); | |
104 | } | |
105 | ||
fe372740 | 106 | static int packref_cmp(const void *a_, const void *b_) |
d00d5464 | 107 | { |
fe372740 RB |
108 | const struct packref *a = a_, *b = b_; |
109 | return strcmp(a->name, b->name); | |
d00d5464 ET |
110 | } |
111 | ||
fe372740 | 112 | static int packed_reload(refdb_fs_backend *backend) |
d00d5464 | 113 | { |
fe372740 | 114 | int error; |
e579e0f7 | 115 | git_str packedrefs = GIT_STR_INIT; |
fe372740 | 116 | char *scan, *eof, *eol; |
4dcd8780 | 117 | |
71dd0861 | 118 | if (!backend->gitpath) |
69a3c766 CMN |
119 | return 0; |
120 | ||
fe372740 | 121 | error = git_sortedcache_lockandload(backend->refcache, &packedrefs); |
d00d5464 ET |
122 | |
123 | /* | |
fe372740 RB |
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. | |
d00d5464 | 128 | */ |
fe372740 RB |
129 | if (error <= 0) { |
130 | if (error == GIT_ENOTFOUND) { | |
c25aa7cd | 131 | GIT_UNUSED(git_sortedcache_clear(backend->refcache, true)); |
ac3d33df | 132 | git_error_clear(); |
fe372740 RB |
133 | error = 0; |
134 | } | |
135 | return error; | |
d00d5464 ET |
136 | } |
137 | ||
fe372740 | 138 | /* At this point, refresh the packed refs from the loaded buffer. */ |
d00d5464 | 139 | |
c25aa7cd | 140 | GIT_UNUSED(git_sortedcache_clear(backend->refcache, false)); |
d00d5464 | 141 | |
e579e0f7 | 142 | scan = packedrefs.ptr; |
fe372740 | 143 | eof = scan + packedrefs.size; |
d00d5464 | 144 | |
e579e0f7 MB |
145 | scan = packed_set_peeling_mode(scan, packedrefs.size, backend); |
146 | if (!scan) | |
147 | goto parse_failed; | |
f69db390 | 148 | |
fe372740 RB |
149 | while (scan < eof && *scan == '#') { |
150 | if (!(eol = strchr(scan, '\n'))) | |
d00d5464 | 151 | goto parse_failed; |
fe372740 | 152 | scan = eol + 1; |
d00d5464 ET |
153 | } |
154 | ||
fe372740 RB |
155 | while (scan < eof) { |
156 | struct packref *ref; | |
157 | git_oid oid; | |
158 | ||
159 | /* parse "<OID> <refname>\n" */ | |
d00d5464 | 160 | |
fe372740 | 161 | if (git_oid_fromstr(&oid, scan) < 0) |
d00d5464 | 162 | goto parse_failed; |
fe372740 | 163 | scan += GIT_OID_HEXSZ; |
d00d5464 | 164 | |
fe372740 RB |
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'; | |
d00d5464 | 172 | |
fe372740 | 173 | if (git_sortedcache_upsert((void **)&ref, backend->refcache, scan) < 0) |
d00d5464 | 174 | goto parse_failed; |
fe372740 RB |
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; | |
d00d5464 ET |
199 | } |
200 | ||
8d9a85d4 | 201 | git_sortedcache_wunlock(backend->refcache); |
e579e0f7 | 202 | git_str_dispose(&packedrefs); |
fe372740 | 203 | |
d00d5464 ET |
204 | return 0; |
205 | ||
206 | parse_failed: | |
ac3d33df | 207 | git_error_set(GIT_ERROR_REFERENCE, "corrupted packed references file"); |
fe372740 | 208 | |
c25aa7cd | 209 | GIT_UNUSED(git_sortedcache_clear(backend->refcache, false)); |
8d9a85d4 | 210 | git_sortedcache_wunlock(backend->refcache); |
e579e0f7 | 211 | git_str_dispose(&packedrefs); |
fe372740 | 212 | |
d00d5464 ET |
213 | return -1; |
214 | } | |
215 | ||
fe372740 | 216 | static int loose_parse_oid( |
e579e0f7 | 217 | git_oid *oid, const char *filename, git_str *file_content) |
d00d5464 | 218 | { |
e579e0f7 | 219 | const char *str = git_str_cstr(file_content); |
d00d5464 | 220 | |
e579e0f7 | 221 | if (git_str_len(file_content) < GIT_OID_HEXSZ) |
d00d5464 ET |
222 | goto corrupted; |
223 | ||
d00d5464 | 224 | /* we need to get 40 OID characters from the file */ |
fe372740 | 225 | if (git_oid_fromstr(oid, str) < 0) |
d00d5464 ET |
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: | |
ac3d33df | 234 | git_error_set(GIT_ERROR_REFERENCE, "corrupted loose reference file: %s", filename); |
d00d5464 ET |
235 | return -1; |
236 | } | |
237 | ||
e579e0f7 | 238 | static int loose_readbuffer(git_str *buf, const char *base, const char *path) |
fe372740 RB |
239 | { |
240 | int error; | |
241 | ||
c25aa7cd PP |
242 | if ((error = loose_path(buf, base, path)) < 0 || |
243 | (error = git_futils_readbuffer(buf, buf->ptr)) < 0) | |
e579e0f7 | 244 | git_str_dispose(buf); |
fe372740 RB |
245 | |
246 | return error; | |
247 | } | |
248 | ||
249 | static int loose_lookup_to_packfile(refdb_fs_backend *backend, const char *name) | |
d00d5464 | 250 | { |
fe372740 | 251 | int error = 0; |
e579e0f7 | 252 | git_str ref_file = GIT_STR_INIT; |
d00d5464 | 253 | struct packref *ref = NULL; |
fe372740 | 254 | git_oid oid; |
d00d5464 | 255 | |
fe372740 RB |
256 | /* if we fail to load the loose reference, assume someone changed |
257 | * the filesystem under us and skip it... | |
258 | */ | |
71dd0861 | 259 | if (loose_readbuffer(&ref_file, backend->gitpath, name) < 0) { |
ac3d33df | 260 | git_error_clear(); |
fe372740 RB |
261 | goto done; |
262 | } | |
d00d5464 | 263 | |
0f0f5655 | 264 | /* skip symbolic refs */ |
e579e0f7 | 265 | if (!git__prefixcmp(git_str_cstr(&ref_file), GIT_SYMREF)) |
fe372740 | 266 | goto done; |
0f0f5655 | 267 | |
fe372740 RB |
268 | /* parse OID from file */ |
269 | if ((error = loose_parse_oid(&oid, name, &ref_file)) < 0) | |
270 | goto done; | |
d00d5464 | 271 | |
c25aa7cd PP |
272 | if ((error = git_sortedcache_wlock(backend->refcache)) < 0) |
273 | goto done; | |
d00d5464 | 274 | |
fe372740 RB |
275 | if (!(error = git_sortedcache_upsert( |
276 | (void **)&ref, backend->refcache, name))) { | |
d00d5464 | 277 | |
fe372740 RB |
278 | git_oid_cpy(&ref->oid, &oid); |
279 | ref->flags = PACKREF_WAS_LOOSE; | |
d00d5464 ET |
280 | } |
281 | ||
8d9a85d4 | 282 | git_sortedcache_wunlock(backend->refcache); |
d00d5464 | 283 | |
fe372740 | 284 | done: |
e579e0f7 | 285 | git_str_dispose(&ref_file); |
fe372740 | 286 | return error; |
d00d5464 ET |
287 | } |
288 | ||
e579e0f7 | 289 | static int _dirent_loose_load(void *payload, git_str *full_path) |
d00d5464 | 290 | { |
25e0b157 | 291 | refdb_fs_backend *backend = payload; |
d00d5464 | 292 | const char *file_path; |
d00d5464 | 293 | |
fe372740 RB |
294 | if (git__suffixcmp(full_path->ptr, ".lock") == 0) |
295 | return 0; | |
296 | ||
e579e0f7 MB |
297 | if (git_fs_path_isdir(full_path->ptr)) { |
298 | int error = git_fs_path_direach( | |
25e0b157 | 299 | full_path, backend->direach_flags, _dirent_loose_load, backend); |
a213a7bf CMN |
300 | /* Race with the filesystem, ignore it */ |
301 | if (error == GIT_ENOTFOUND) { | |
ac3d33df | 302 | git_error_clear(); |
a213a7bf CMN |
303 | return 0; |
304 | } | |
305 | ||
306 | return error; | |
307 | } | |
d00d5464 | 308 | |
71dd0861 | 309 | file_path = full_path->ptr + strlen(backend->gitpath); |
d00d5464 | 310 | |
25e0b157 | 311 | return loose_lookup_to_packfile(backend, file_path); |
d00d5464 ET |
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 | { | |
fe372740 | 322 | int error; |
e579e0f7 | 323 | git_str refs_path = GIT_STR_INIT; |
d00d5464 | 324 | |
e579e0f7 | 325 | if (git_str_joinpath(&refs_path, backend->gitpath, GIT_REFS_DIR) < 0) |
d00d5464 ET |
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 | */ | |
e579e0f7 | 333 | error = git_fs_path_direach( |
25e0b157 | 334 | &refs_path, backend->direach_flags, _dirent_loose_load, backend); |
fe372740 | 335 | |
e579e0f7 | 336 | git_str_dispose(&refs_path); |
d00d5464 | 337 | |
96869a4e | 338 | return error; |
d00d5464 ET |
339 | } |
340 | ||
341 | static int refdb_fs_backend__exists( | |
342 | int *exists, | |
343 | git_refdb_backend *_backend, | |
344 | const char *ref_name) | |
345 | { | |
22a2d3d5 | 346 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
e579e0f7 | 347 | git_str ref_path = GIT_STR_INIT; |
ce5553d4 | 348 | int error; |
d00d5464 | 349 | |
c25aa7cd | 350 | GIT_ASSERT_ARG(backend); |
d00d5464 | 351 | |
22a2d3d5 UG |
352 | *exists = 0; |
353 | ||
c25aa7cd | 354 | if ((error = loose_path(&ref_path, backend->gitpath, ref_name)) < 0) |
22a2d3d5 | 355 | goto out; |
d00d5464 | 356 | |
e579e0f7 | 357 | if (git_fs_path_isfile(ref_path.ptr)) { |
22a2d3d5 UG |
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 | } | |
d00d5464 | 369 | |
22a2d3d5 | 370 | out: |
e579e0f7 | 371 | git_str_dispose(&ref_path); |
22a2d3d5 | 372 | return error; |
d00d5464 ET |
373 | } |
374 | ||
e579e0f7 | 375 | static const char *loose_parse_symbolic(git_str *file_content) |
d00d5464 ET |
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 | ||
e579e0f7 | 382 | if (git_str_len(file_content) < header_len + 1) { |
ac3d33df | 383 | git_error_set(GIT_ERROR_REFERENCE, "corrupted loose reference file"); |
d00d5464 ET |
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 | ||
6da6b425 PS |
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 | */ | |
e0a6c28e PS |
403 | static bool is_per_worktree_ref(const char *ref_name) |
404 | { | |
6da6b425 PS |
405 | return git__prefixcmp(ref_name, "refs/") != 0 || |
406 | git__prefixcmp(ref_name, "refs/bisect/") == 0; | |
e0a6c28e PS |
407 | } |
408 | ||
d00d5464 ET |
409 | static int loose_lookup( |
410 | git_reference **out, | |
411 | refdb_fs_backend *backend, | |
412 | const char *ref_name) | |
413 | { | |
e579e0f7 | 414 | git_str ref_file = GIT_STR_INIT; |
d00d5464 | 415 | int error = 0; |
e0a6c28e | 416 | const char *ref_dir; |
d00d5464 | 417 | |
b7107131 RB |
418 | if (out) |
419 | *out = NULL; | |
420 | ||
e0a6c28e PS |
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) | |
fe372740 | 427 | /* cannot read loose ref file - gah */; |
e579e0f7 | 428 | else if (git__prefixcmp(git_str_cstr(&ref_file), GIT_SYMREF) == 0) { |
fe372740 | 429 | const char *target; |
d00d5464 | 430 | |
e579e0f7 | 431 | git_str_rtrim(&ref_file); |
d00d5464 | 432 | |
fe372740 | 433 | if (!(target = loose_parse_symbolic(&ref_file))) |
d00d5464 | 434 | error = -1; |
fe372740 | 435 | else if (out != NULL) |
b7107131 | 436 | *out = git_reference__alloc_symbolic(ref_name, target); |
d00d5464 | 437 | } else { |
fe372740 | 438 | git_oid oid; |
4dcd8780 | 439 | |
fe372740 RB |
440 | if (!(error = loose_parse_oid(&oid, ref_name, &ref_file)) && |
441 | out != NULL) | |
b7107131 | 442 | *out = git_reference__alloc(ref_name, &oid, NULL); |
d00d5464 ET |
443 | } |
444 | ||
e579e0f7 | 445 | git_str_dispose(&ref_file); |
d00d5464 ET |
446 | return error; |
447 | } | |
448 | ||
fe372740 | 449 | static int ref_error_notfound(const char *name) |
d00d5464 | 450 | { |
ac3d33df | 451 | git_error_set(GIT_ERROR_REFERENCE, "reference '%s' not found", name); |
fe372740 | 452 | return GIT_ENOTFOUND; |
d00d5464 ET |
453 | } |
454 | ||
e579e0f7 MB |
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) | |
d00d5464 | 647 | { |
d00d5464 | 648 | int error = 0; |
fe372740 | 649 | struct packref *entry; |
4dcd8780 | 650 | |
ce5553d4 CMN |
651 | if ((error = packed_reload(backend)) < 0) |
652 | return error; | |
4dcd8780 | 653 | |
8d9a85d4 RB |
654 | if (git_sortedcache_rlock(backend->refcache) < 0) |
655 | return -1; | |
fe372740 RB |
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 | ||
8d9a85d4 RB |
666 | git_sortedcache_runlock(backend->refcache); |
667 | ||
fe372740 | 668 | return error; |
d00d5464 ET |
669 | } |
670 | ||
e579e0f7 MB |
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 | ||
d00d5464 ET |
750 | static int refdb_fs_backend__lookup( |
751 | git_reference **out, | |
752 | git_refdb_backend *_backend, | |
753 | const char *ref_name) | |
754 | { | |
22a2d3d5 | 755 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
fe372740 | 756 | int error; |
d00d5464 | 757 | |
c25aa7cd | 758 | GIT_ASSERT_ARG(backend); |
d00d5464 | 759 | |
fe372740 | 760 | if (!(error = loose_lookup(out, backend, ref_name))) |
d00d5464 ET |
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 */ | |
fe372740 | 765 | if (error == GIT_ENOTFOUND) { |
ac3d33df | 766 | git_error_clear(); |
fe372740 | 767 | error = packed_lookup(out, backend, ref_name); |
d00d5464 | 768 | } |
fe372740 | 769 | return error; |
d00d5464 ET |
770 | } |
771 | ||
4def7035 CMN |
772 | typedef struct { |
773 | git_reference_iterator parent; | |
2638a03a | 774 | |
ec24e542 | 775 | char *glob; |
c77342ef RB |
776 | |
777 | git_pool pool; | |
2638a03a | 778 | git_vector loose; |
c77342ef | 779 | |
2d945f82 | 780 | git_sortedcache *cache; |
fe372740 RB |
781 | size_t loose_pos; |
782 | size_t packed_pos; | |
4def7035 CMN |
783 | } refdb_fs_iter; |
784 | ||
4def7035 | 785 | static void refdb_fs_backend__iterator_free(git_reference_iterator *_iter) |
d00d5464 | 786 | { |
22a2d3d5 | 787 | refdb_fs_iter *iter = GIT_CONTAINER_OF(_iter, refdb_fs_iter, parent); |
2638a03a VM |
788 | |
789 | git_vector_free(&iter->loose); | |
c77342ef | 790 | git_pool_clear(&iter->pool); |
2d945f82 | 791 | git_sortedcache_free(iter->cache); |
4def7035 CMN |
792 | git__free(iter); |
793 | } | |
d00d5464 | 794 | |
ec24e542 | 795 | static int iter_load_loose_paths(refdb_fs_backend *backend, refdb_fs_iter *iter) |
4def7035 | 796 | { |
219d3457 | 797 | int error = 0; |
e579e0f7 | 798 | git_str path = GIT_STR_INIT; |
c77342ef | 799 | git_iterator *fsit = NULL; |
ed1c6446 | 800 | git_iterator_options fsit_opts = GIT_ITERATOR_OPTIONS_INIT; |
2638a03a | 801 | const git_index_entry *entry = NULL; |
ac3d33df JK |
802 | const char *ref_prefix = GIT_REFS_DIR; |
803 | size_t ref_prefix_len = strlen(ref_prefix); | |
d00d5464 | 804 | |
e0a6c28e | 805 | if (!backend->commonpath) /* do nothing if no commonpath for loose refs */ |
cee695ae RB |
806 | return 0; |
807 | ||
ed1c6446 ET |
808 | fsit_opts.flags = backend->iterator_flags; |
809 | ||
ac3d33df JK |
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 | ||
e579e0f7 MB |
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); | |
fe372740 RB |
837 | return error; |
838 | } | |
d00d5464 | 839 | |
ac3d33df | 840 | if ((error = git_iterator_for_filesystem(&fsit, path.ptr, &fsit_opts)) < 0) { |
e579e0f7 | 841 | git_str_dispose(&path); |
ac3d33df JK |
842 | return (iter->glob && error == GIT_ENOTFOUND)? 0 : error; |
843 | } | |
844 | ||
e579e0f7 | 845 | error = git_str_sets(&path, ref_prefix); |
d00d5464 | 846 | |
fe372740 | 847 | while (!error && !git_iterator_advance(&entry, fsit)) { |
2638a03a | 848 | const char *ref_name; |
c77342ef | 849 | char *ref_dup; |
d00d5464 | 850 | |
e579e0f7 MB |
851 | git_str_truncate(&path, ref_prefix_len); |
852 | git_str_puts(&path, entry->path); | |
853 | ref_name = git_str_cstr(&path); | |
4dcd8780 | 854 | |
ec24e542 | 855 | if (git__suffixcmp(ref_name, ".lock") == 0 || |
22a2d3d5 | 856 | (iter->glob && wildmatch(iter->glob, ref_name, 0) != 0)) |
2638a03a | 857 | continue; |
d00d5464 | 858 | |
fe372740 RB |
859 | ref_dup = git_pool_strdup(&iter->pool, ref_name); |
860 | if (!ref_dup) | |
c77342ef | 861 | error = -1; |
fe372740 RB |
862 | else |
863 | error = git_vector_insert(&iter->loose, ref_dup); | |
2638a03a | 864 | } |
d00d5464 | 865 | |
2638a03a | 866 | git_iterator_free(fsit); |
e579e0f7 | 867 | git_str_dispose(&path); |
4def7035 | 868 | |
fe372740 | 869 | return error; |
4def7035 CMN |
870 | } |
871 | ||
ec24e542 VM |
872 | static int refdb_fs_backend__iterator_next( |
873 | git_reference **out, git_reference_iterator *_iter) | |
4def7035 | 874 | { |
8d9a85d4 | 875 | int error = GIT_ITEROVER; |
22a2d3d5 UG |
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); | |
fe372740 | 878 | struct packref *ref; |
4def7035 | 879 | |
56960b83 | 880 | while (iter->loose_pos < iter->loose.length) { |
2638a03a | 881 | const char *path = git_vector_get(&iter->loose, iter->loose_pos++); |
56960b83 | 882 | |
22a2d3d5 UG |
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 | ||
56960b83 | 888 | return 0; |
22a2d3d5 | 889 | } |
56960b83 | 890 | |
ac3d33df | 891 | git_error_clear(); |
2638a03a | 892 | } |
d00d5464 | 893 | |
2d945f82 CMN |
894 | error = GIT_ITEROVER; |
895 | while (iter->packed_pos < git_sortedcache_entrycount(iter->cache)) { | |
896 | ref = git_sortedcache_entry(iter->cache, iter->packed_pos++); | |
fe372740 RB |
897 | if (!ref) /* stop now if another thread deleted refs and we past end */ |
898 | break; | |
ec24e542 VM |
899 | |
900 | if (ref->flags & PACKREF_SHADOWED) | |
901 | continue; | |
22a2d3d5 | 902 | if (iter->glob && wildmatch(iter->glob, ref->name, 0) != 0) |
ec24e542 | 903 | continue; |
99d32707 | 904 | |
56960b83 | 905 | *out = git_reference__alloc(ref->name, &ref->oid, &ref->peel); |
8d9a85d4 RB |
906 | error = (*out != NULL) ? 0 : -1; |
907 | break; | |
4def7035 CMN |
908 | } |
909 | ||
8d9a85d4 | 910 | return error; |
d00d5464 ET |
911 | } |
912 | ||
ec24e542 VM |
913 | static int refdb_fs_backend__iterator_next_name( |
914 | const char **out, git_reference_iterator *_iter) | |
915 | { | |
8d9a85d4 | 916 | int error = GIT_ITEROVER; |
22a2d3d5 UG |
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); | |
8d9a85d4 | 919 | struct packref *ref; |
ec24e542 VM |
920 | |
921 | while (iter->loose_pos < iter->loose.length) { | |
922 | const char *path = git_vector_get(&iter->loose, iter->loose_pos++); | |
22a2d3d5 | 923 | struct packref *ref; |
ec24e542 | 924 | |
8d9a85d4 | 925 | if (loose_lookup(NULL, backend, path) == 0) { |
22a2d3d5 UG |
926 | ref = git_sortedcache_lookup(iter->cache, path); |
927 | if (ref) | |
928 | ref->flags |= PACKREF_SHADOWED; | |
929 | ||
8d9a85d4 RB |
930 | *out = path; |
931 | return 0; | |
b7107131 RB |
932 | } |
933 | ||
ac3d33df | 934 | git_error_clear(); |
ec24e542 VM |
935 | } |
936 | ||
2d945f82 CMN |
937 | error = GIT_ITEROVER; |
938 | while (iter->packed_pos < git_sortedcache_entrycount(iter->cache)) { | |
939 | ref = git_sortedcache_entry(iter->cache, iter->packed_pos++); | |
8d9a85d4 RB |
940 | if (!ref) /* stop now if another thread deleted refs and we past end */ |
941 | break; | |
fe372740 RB |
942 | |
943 | if (ref->flags & PACKREF_SHADOWED) | |
944 | continue; | |
22a2d3d5 | 945 | if (iter->glob && wildmatch(iter->glob, ref->name, 0) != 0) |
ec24e542 VM |
946 | continue; |
947 | ||
8d9a85d4 RB |
948 | *out = ref->name; |
949 | error = 0; | |
950 | break; | |
ec24e542 VM |
951 | } |
952 | ||
8d9a85d4 | 953 | return error; |
ec24e542 VM |
954 | } |
955 | ||
956 | static int refdb_fs_backend__iterator( | |
957 | git_reference_iterator **out, git_refdb_backend *_backend, const char *glob) | |
958 | { | |
22a2d3d5 UG |
959 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
960 | refdb_fs_iter *iter = NULL; | |
ce5553d4 | 961 | int error; |
ec24e542 | 962 | |
c25aa7cd | 963 | GIT_ASSERT_ARG(backend); |
ec24e542 | 964 | |
ec24e542 | 965 | iter = git__calloc(1, sizeof(refdb_fs_iter)); |
ac3d33df | 966 | GIT_ERROR_CHECK_ALLOC(iter); |
ec24e542 | 967 | |
22a2d3d5 UG |
968 | if ((error = git_pool_init(&iter->pool, 1)) < 0) |
969 | goto out; | |
1e5e02b4 | 970 | |
22a2d3d5 UG |
971 | if ((error = git_vector_init(&iter->loose, 8, NULL)) < 0) |
972 | goto out; | |
c77342ef RB |
973 | |
974 | if (glob != NULL && | |
22a2d3d5 UG |
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; | |
ec24e542 VM |
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 | ||
ec24e542 | 993 | *out = (git_reference_iterator *)iter; |
22a2d3d5 UG |
994 | out: |
995 | if (error) | |
996 | refdb_fs_backend__iterator_free((git_reference_iterator *)iter); | |
997 | return error; | |
ec24e542 VM |
998 | } |
999 | ||
4e6e2ff2 VM |
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, | |
c25aa7cd | 1020 | const char *old_ref, |
4e6e2ff2 VM |
1021 | int force) |
1022 | { | |
fe372740 | 1023 | size_t i; |
ce5553d4 | 1024 | int error; |
4e6e2ff2 | 1025 | |
ce5553d4 CMN |
1026 | if ((error = packed_reload(backend)) < 0) |
1027 | return error; | |
4e6e2ff2 VM |
1028 | |
1029 | if (!force) { | |
1030 | int exists; | |
1031 | ||
ce5553d4 CMN |
1032 | if ((error = refdb_fs_backend__exists( |
1033 | &exists, (git_refdb_backend *)backend, new_ref)) < 0) { | |
1034 | return error; | |
1035 | } | |
4e6e2ff2 VM |
1036 | |
1037 | if (exists) { | |
ac3d33df | 1038 | git_error_set(GIT_ERROR_REFERENCE, |
909d5494 | 1039 | "failed to write reference '%s': a reference with " |
8d9a85d4 | 1040 | "that name already exists.", new_ref); |
4e6e2ff2 VM |
1041 | return GIT_EEXISTS; |
1042 | } | |
1043 | } | |
1044 | ||
c25aa7cd PP |
1045 | if ((error = git_sortedcache_rlock(backend->refcache)) < 0) |
1046 | return error; | |
fe372740 RB |
1047 | |
1048 | for (i = 0; i < git_sortedcache_entrycount(backend->refcache); ++i) { | |
8d9a85d4 | 1049 | struct packref *ref = git_sortedcache_entry(backend->refcache, i); |
fe372740 | 1050 | |
8d9a85d4 RB |
1051 | if (ref && !ref_is_available(old_ref, new_ref, ref->name)) { |
1052 | git_sortedcache_runlock(backend->refcache); | |
ac3d33df | 1053 | git_error_set(GIT_ERROR_REFERENCE, |
909d5494 | 1054 | "path to reference '%s' collides with existing one", new_ref); |
4e6e2ff2 VM |
1055 | return -1; |
1056 | } | |
fe372740 | 1057 | } |
c77342ef | 1058 | |
8d9a85d4 | 1059 | git_sortedcache_runlock(backend->refcache); |
4e6e2ff2 VM |
1060 | return 0; |
1061 | } | |
ec24e542 | 1062 | |
7ee8c7e6 | 1063 | static int loose_lock(git_filebuf *file, refdb_fs_backend *backend, const char *name) |
d00d5464 | 1064 | { |
af3dcb0e | 1065 | int error, filebuf_flags; |
e579e0f7 | 1066 | git_str ref_path = GIT_STR_INIT; |
097f0105 | 1067 | const char *basedir; |
d00d5464 | 1068 | |
c25aa7cd PP |
1069 | GIT_ASSERT_ARG(file); |
1070 | GIT_ASSERT_ARG(backend); | |
1071 | GIT_ASSERT_ARG(name); | |
9b148098 | 1072 | |
e579e0f7 | 1073 | if (!git_path_is_valid(backend->repo, name, 0, GIT_FS_PATH_REJECT_FILESYSTEM_DEFAULTS)) { |
ac3d33df | 1074 | git_error_set(GIT_ERROR_INVALID, "invalid reference name '%s'", name); |
a64119e3 ET |
1075 | return GIT_EINVALIDSPEC; |
1076 | } | |
1077 | ||
097f0105 PS |
1078 | if (is_per_worktree_ref(name)) |
1079 | basedir = backend->gitpath; | |
1080 | else | |
1081 | basedir = backend->commonpath; | |
1082 | ||
d00d5464 ET |
1083 | /* Remove a possibly existing empty directory hierarchy |
1084 | * which name would collide with the reference name | |
1085 | */ | |
097f0105 | 1086 | if ((error = git_futils_rmdir_r(name, basedir, GIT_RMDIR_SKIP_NONEMPTY)) < 0) |
6ab65b80 | 1087 | return error; |
d00d5464 | 1088 | |
c25aa7cd PP |
1089 | if ((error = loose_path(&ref_path, basedir, name)) < 0) |
1090 | return error; | |
d00d5464 | 1091 | |
22a2d3d5 | 1092 | filebuf_flags = GIT_FILEBUF_CREATE_LEADING_DIRS; |
1c04a96b | 1093 | if (backend->fsync) |
af3dcb0e ET |
1094 | filebuf_flags |= GIT_FILEBUF_FSYNC; |
1095 | ||
1096 | error = git_filebuf_open(file, ref_path.ptr, filebuf_flags, GIT_REFS_FILE_MODE); | |
d00d5464 | 1097 | |
b46c7ee5 | 1098 | if (error == GIT_EDIRECTORY) |
ac3d33df | 1099 | git_error_set(GIT_ERROR_REFERENCE, "cannot lock ref '%s', there are refs beneath that folder", name); |
b46c7ee5 | 1100 | |
e579e0f7 | 1101 | git_str_dispose(&ref_path); |
b46c7ee5 | 1102 | return error; |
a57dd3b7 | 1103 | } |
d00d5464 | 1104 | |
a57dd3b7 CMN |
1105 | static int loose_commit(git_filebuf *file, const git_reference *ref) |
1106 | { | |
c25aa7cd PP |
1107 | GIT_ASSERT_ARG(file); |
1108 | GIT_ASSERT_ARG(ref); | |
9b148098 | 1109 | |
ac3d33df | 1110 | if (ref->type == GIT_REFERENCE_DIRECT) { |
d00d5464 | 1111 | char oid[GIT_OID_HEXSZ + 1]; |
fe372740 | 1112 | git_oid_nfmt(oid, sizeof(oid), &ref->target.oid); |
d00d5464 | 1113 | |
a57dd3b7 | 1114 | git_filebuf_printf(file, "%s\n", oid); |
ac3d33df | 1115 | } else if (ref->type == GIT_REFERENCE_SYMBOLIC) { |
a57dd3b7 | 1116 | git_filebuf_printf(file, GIT_SYMREF "%s\n", ref->target.symbolic); |
d00d5464 | 1117 | } else { |
c25aa7cd | 1118 | GIT_ASSERT(0); |
d00d5464 ET |
1119 | } |
1120 | ||
a57dd3b7 | 1121 | return git_filebuf_commit(file); |
d00d5464 ET |
1122 | } |
1123 | ||
ab8d9242 CMN |
1124 | static int refdb_fs_backend__lock(void **out, git_refdb_backend *_backend, const char *refname) |
1125 | { | |
1126 | int error; | |
1127 | git_filebuf *lock; | |
22a2d3d5 | 1128 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
ab8d9242 CMN |
1129 | |
1130 | lock = git__calloc(1, sizeof(git_filebuf)); | |
ac3d33df | 1131 | GIT_ERROR_CHECK_ALLOC(lock); |
ab8d9242 CMN |
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, | |
ab8d9242 | 1147 | const git_oid *old_id, |
22a2d3d5 UG |
1148 | const char *old_target, |
1149 | const git_signature *who, | |
1150 | const char *message); | |
ab8d9242 CMN |
1151 | |
1152 | static int refdb_fs_backend__delete_tail( | |
1153 | git_refdb_backend *_backend, | |
1154 | git_filebuf *file, | |
1155 | const char *ref_name, | |
22a2d3d5 UG |
1156 | const git_oid *old_id, |
1157 | const char *old_target); | |
ab8d9242 CMN |
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) | |
22a2d3d5 | 1168 | error = refdb_fs_backend__write_tail(backend, ref, lock, update_reflog, NULL, NULL, sig, message); |
ab8d9242 CMN |
1169 | else |
1170 | git_filebuf_cleanup(lock); | |
1171 | ||
1172 | git__free(lock); | |
1173 | return error; | |
1174 | } | |
1175 | ||
d00d5464 ET |
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 | ||
f69db390 | 1188 | if (ref->flags & PACKREF_HAS_PEEL || ref->flags & PACKREF_CANNOT_PEEL) |
d00d5464 ET |
1189 | return 0; |
1190 | ||
d00d5464 ET |
1191 | /* |
1192 | * Find the tagged object in the repository | |
1193 | */ | |
ac3d33df | 1194 | if (git_object_lookup(&object, backend->repo, &ref->oid, GIT_OBJECT_ANY) < 0) |
d00d5464 ET |
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 | */ | |
ac3d33df | 1202 | if (git_object_type(object) == GIT_OBJECT_TAG) { |
d00d5464 ET |
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)); | |
f69db390 | 1209 | ref->flags |= PACKREF_HAS_PEEL; |
d00d5464 ET |
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]; | |
fe372740 | 1228 | git_oid_nfmt(oid, sizeof(oid), &ref->oid); |
d00d5464 ET |
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 | */ | |
f69db390 | 1240 | if (ref->flags & PACKREF_HAS_PEEL) { |
d00d5464 | 1241 | char peel[GIT_OID_HEXSZ + 1]; |
fe372740 | 1242 | git_oid_nfmt(peel, sizeof(peel), &ref->peel); |
d00d5464 ET |
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 | */ | |
fe372740 | 1265 | static int packed_remove_loose(refdb_fs_backend *backend) |
d00d5464 | 1266 | { |
10c06114 | 1267 | size_t i; |
dd1ca6f1 | 1268 | git_filebuf lock = GIT_FILEBUF_INIT; |
e579e0f7 | 1269 | git_str ref_content = GIT_STR_INIT; |
7ea4710a | 1270 | int error = 0; |
d00d5464 | 1271 | |
fe372740 RB |
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); | |
2d9aec99 | 1276 | git_oid current_id; |
d00d5464 | 1277 | |
8d9a85d4 | 1278 | if (!ref || !(ref->flags & PACKREF_WAS_LOOSE)) |
d00d5464 ET |
1279 | continue; |
1280 | ||
dd1ca6f1 CMN |
1281 | git_filebuf_cleanup(&lock); |
1282 | ||
2d9aec99 CMN |
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 */ | |
7ea4710a | 1286 | if (error == GIT_EEXISTS || error == GIT_ENOTFOUND) |
2d9aec99 CMN |
1287 | continue; |
1288 | ||
1289 | if (error < 0) { | |
e579e0f7 | 1290 | git_str_dispose(&ref_content); |
ac3d33df | 1291 | git_error_set(GIT_ERROR_REFERENCE, "failed to lock loose reference '%s'", ref->name); |
7ea4710a | 1292 | return error; |
2d9aec99 CMN |
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 */ | |
dd1ca6f1 | 1297 | if (error == GIT_ENOTFOUND) |
2d9aec99 | 1298 | continue; |
2d9aec99 CMN |
1299 | |
1300 | /* This became a symref between us packing and trying to delete it, so ignore it */ | |
dd1ca6f1 | 1301 | if (!git__prefixcmp(ref_content.ptr, GIT_SYMREF)) |
2d9aec99 | 1302 | continue; |
2d9aec99 | 1303 | |
dd1ca6f1 CMN |
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) | |
2d9aec99 | 1306 | continue; |
d00d5464 | 1307 | |
2d9aec99 | 1308 | /* If the ref moved since we packed it, we must not delete it */ |
dd1ca6f1 | 1309 | if (!git_oid_equal(¤t_id, &ref->oid)) |
2d9aec99 | 1310 | continue; |
2d9aec99 | 1311 | |
d00d5464 ET |
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. | |
7ea4710a CMN |
1315 | * If we fail to remove, the ref is still in the old state, so |
1316 | * we haven't lost information. | |
d00d5464 | 1317 | */ |
7ea4710a | 1318 | p_unlink(lock.path_original); |
d00d5464 ET |
1319 | } |
1320 | ||
e579e0f7 | 1321 | git_str_dispose(&ref_content); |
dd1ca6f1 | 1322 | git_filebuf_cleanup(&lock); |
7ea4710a | 1323 | return 0; |
d00d5464 ET |
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 | { | |
8d9a85d4 | 1331 | git_sortedcache *refcache = backend->refcache; |
d00d5464 | 1332 | git_filebuf pack_file = GIT_FILEBUF_INIT; |
eb56ed81 | 1333 | int error, open_flags = 0; |
10c06114 | 1334 | size_t i; |
d00d5464 | 1335 | |
e579e0f7 MB |
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 | ||
fe372740 | 1345 | /* lock the cache to updates while we do this */ |
9914efec CMN |
1346 | if ((error = git_sortedcache_wlock(refcache)) < 0) |
1347 | return error; | |
d00d5464 | 1348 | |
1c04a96b | 1349 | if (backend->fsync) |
eb56ed81 ET |
1350 | open_flags = GIT_FILEBUF_FSYNC; |
1351 | ||
fe372740 | 1352 | /* Open the file! */ |
eb56ed81 | 1353 | if ((error = git_filebuf_open(&pack_file, git_sortedcache_path(refcache), open_flags, GIT_PACKEDREFS_FILE_MODE)) < 0) |
8d9a85d4 | 1354 | goto fail; |
d00d5464 ET |
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 */ | |
9914efec | 1359 | if ((error = git_filebuf_printf(&pack_file, "%s\n", GIT_PACKEDREFS_HEADER)) < 0) |
8d9a85d4 | 1360 | goto fail; |
d00d5464 | 1361 | |
8d9a85d4 RB |
1362 | for (i = 0; i < git_sortedcache_entrycount(refcache); ++i) { |
1363 | struct packref *ref = git_sortedcache_entry(refcache, i); | |
c25aa7cd | 1364 | GIT_ASSERT(ref); |
d00d5464 | 1365 | |
9914efec | 1366 | if ((error = packed_find_peel(backend, ref)) < 0) |
8d9a85d4 | 1367 | goto fail; |
d00d5464 | 1368 | |
9914efec | 1369 | if ((error = packed_write_ref(ref, &pack_file)) < 0) |
8d9a85d4 | 1370 | goto fail; |
d00d5464 ET |
1371 | } |
1372 | ||
1373 | /* if we've written all the references properly, we can commit | |
1374 | * the packfile to make the changes effective */ | |
9914efec | 1375 | if ((error = git_filebuf_commit(&pack_file)) < 0) |
8d9a85d4 | 1376 | goto fail; |
d00d5464 ET |
1377 | |
1378 | /* when and only when the packfile has been properly written, | |
1379 | * we can go ahead and remove the loose refs */ | |
9914efec | 1380 | if ((error = packed_remove_loose(backend)) < 0) |
8d9a85d4 | 1381 | goto fail; |
d00d5464 | 1382 | |
8d9a85d4 RB |
1383 | git_sortedcache_updated(refcache); |
1384 | git_sortedcache_wunlock(refcache); | |
d00d5464 ET |
1385 | |
1386 | /* we're good now */ | |
1387 | return 0; | |
1388 | ||
8d9a85d4 | 1389 | fail: |
d00d5464 | 1390 | git_filebuf_cleanup(&pack_file); |
8d9a85d4 | 1391 | git_sortedcache_wunlock(refcache); |
d00d5464 | 1392 | |
9914efec | 1393 | return error; |
d00d5464 ET |
1394 | } |
1395 | ||
22a2d3d5 | 1396 | static int packed_delete(refdb_fs_backend *backend, const char *ref_name) |
6f13a305 | 1397 | { |
22a2d3d5 UG |
1398 | size_t pack_pos; |
1399 | int error, found = 0; | |
6f13a305 | 1400 | |
22a2d3d5 UG |
1401 | if ((error = packed_reload(backend)) < 0) |
1402 | goto cleanup; | |
83504371 | 1403 | |
22a2d3d5 UG |
1404 | if ((error = git_sortedcache_wlock(backend->refcache)) < 0) |
1405 | goto cleanup; | |
83504371 | 1406 | |
22a2d3d5 UG |
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; | |
ac3d33df | 1415 | |
22a2d3d5 | 1416 | git_sortedcache_wunlock(backend->refcache); |
ac3d33df | 1417 | |
22a2d3d5 UG |
1418 | if (found) |
1419 | error = packed_write(backend); | |
6f13a305 | 1420 | |
22a2d3d5 UG |
1421 | cleanup: |
1422 | return error; | |
6f13a305 | 1423 | } |
a57dd3b7 | 1424 | |
22a2d3d5 UG |
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 | ||
7ee8c7e6 | 1427 | static int cmp_old_ref(int *cmp, git_refdb_backend *backend, const char *name, |
f8621dde CMN |
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; | |
b7ae71ec CMN |
1434 | /* It "matches" if there is no old value to compare against */ |
1435 | if (!old_id && !old_target) | |
1436 | return 0; | |
1437 | ||
c25aa7cd PP |
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; | |
b7ae71ec | 1441 | goto out; |
c25aa7cd | 1442 | } |
b7ae71ec CMN |
1443 | |
1444 | /* If the types don't match, there's no way the values do */ | |
ac3d33df | 1445 | if (old_id && old_ref->type != GIT_REFERENCE_DIRECT) { |
b7ae71ec CMN |
1446 | *cmp = -1; |
1447 | goto out; | |
1448 | } | |
ac3d33df | 1449 | if (old_target && old_ref->type != GIT_REFERENCE_SYMBOLIC) { |
b7ae71ec CMN |
1450 | *cmp = 1; |
1451 | goto out; | |
f8621dde CMN |
1452 | } |
1453 | ||
ac3d33df | 1454 | if (old_id && old_ref->type == GIT_REFERENCE_DIRECT) |
f8621dde CMN |
1455 | *cmp = git_oid_cmp(old_id, &old_ref->target.oid); |
1456 | ||
ac3d33df | 1457 | if (old_target && old_ref->type == GIT_REFERENCE_SYMBOLIC) |
f8621dde CMN |
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 | ||
4b7e1b9e CMN |
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 | { | |
22a2d3d5 UG |
1482 | git_reference *head = NULL; |
1483 | git_refdb *refdb = NULL; | |
1484 | int error, write_reflog; | |
90388aa8 | 1485 | git_oid old_id; |
99797c96 | 1486 | |
22a2d3d5 UG |
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; | |
4b7e1b9e | 1492 | |
6aaae94a | 1493 | /* if we can't resolve, we use {0}*40 as old id */ |
90388aa8 PS |
1494 | if (git_reference_name_to_id(&old_id, backend->repo, ref->name) < 0) |
1495 | memset(&old_id, 0, sizeof(old_id)); | |
4b7e1b9e | 1496 | |
22a2d3d5 UG |
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; | |
4b7e1b9e | 1500 | |
22a2d3d5 | 1501 | out: |
4b7e1b9e | 1502 | git_reference_free(head); |
22a2d3d5 | 1503 | git_refdb_free(refdb); |
4b7e1b9e CMN |
1504 | return error; |
1505 | } | |
1506 | ||
d00d5464 ET |
1507 | static int refdb_fs_backend__write( |
1508 | git_refdb_backend *_backend, | |
4e6e2ff2 | 1509 | const git_reference *ref, |
110df893 | 1510 | int force, |
a57dd3b7 | 1511 | const git_signature *who, |
9b148098 | 1512 | const char *message, |
91123661 CMN |
1513 | const git_oid *old_id, |
1514 | const char *old_target) | |
d00d5464 | 1515 | { |
22a2d3d5 | 1516 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
a57dd3b7 | 1517 | git_filebuf file = GIT_FILEBUF_INIT; |
ab8d9242 | 1518 | int error = 0; |
d00d5464 | 1519 | |
c25aa7cd | 1520 | GIT_ASSERT_ARG(backend); |
d00d5464 | 1521 | |
ce5553d4 | 1522 | if ((error = reference_path_available(backend, ref->name, NULL, force)) < 0) |
4e6e2ff2 VM |
1523 | return error; |
1524 | ||
9b148098 | 1525 | /* We need to perform the reflog append and old value check under the ref's lock */ |
7ee8c7e6 | 1526 | if ((error = loose_lock(&file, backend, ref->name)) < 0) |
a57dd3b7 CMN |
1527 | return error; |
1528 | ||
22a2d3d5 | 1529 | return refdb_fs_backend__write_tail(_backend, ref, &file, true, old_id, old_target, who, message); |
ab8d9242 CMN |
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, | |
ab8d9242 | 1537 | const git_oid *old_id, |
22a2d3d5 UG |
1538 | const char *old_target, |
1539 | const git_signature *who, | |
1540 | const char *message) | |
ab8d9242 | 1541 | { |
22a2d3d5 | 1542 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
ab8d9242 CMN |
1543 | int error = 0, cmp = 0, should_write; |
1544 | const char *new_target = NULL; | |
1545 | const git_oid *new_id = NULL; | |
1546 | ||
7ee8c7e6 | 1547 | if ((error = cmp_old_ref(&cmp, _backend, ref->name, old_id, old_target)) < 0) |
f8621dde | 1548 | goto on_error; |
91123661 CMN |
1549 | |
1550 | if (cmp) { | |
ac3d33df | 1551 | git_error_set(GIT_ERROR_REFERENCE, "old reference value does not match"); |
91123661 CMN |
1552 | error = GIT_EMODIFIED; |
1553 | goto on_error; | |
9b148098 CMN |
1554 | } |
1555 | ||
ac3d33df | 1556 | if (ref->type == GIT_REFERENCE_SYMBOLIC) |
1afe1400 CMN |
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 | ||
ab8d9242 | 1571 | if (update_reflog) { |
22a2d3d5 UG |
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) | |
4b7e1b9e | 1576 | goto on_error; |
ab8d9242 CMN |
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 | } | |
a57dd3b7 CMN |
1584 | } |
1585 | ||
ab8d9242 | 1586 | return loose_commit(file, ref); |
9b148098 CMN |
1587 | |
1588 | on_error: | |
ab8d9242 | 1589 | git_filebuf_cleanup(file); |
fc4728e3 | 1590 | return error; |
d00d5464 ET |
1591 | } |
1592 | ||
c25aa7cd | 1593 | static int refdb_fs_backend__prune_refs( |
ac3d33df JK |
1594 | refdb_fs_backend *backend, |
1595 | const char *ref_name, | |
22a2d3d5 | 1596 | const char *prefix) |
ac3d33df | 1597 | { |
e579e0f7 MB |
1598 | git_str relative_path = GIT_STR_INIT; |
1599 | git_str base_path = GIT_STR_INIT; | |
ac3d33df | 1600 | size_t commonlen; |
c25aa7cd | 1601 | int error; |
ac3d33df | 1602 | |
c25aa7cd PP |
1603 | GIT_ASSERT_ARG(backend); |
1604 | GIT_ASSERT_ARG(ref_name); | |
ac3d33df | 1605 | |
e579e0f7 | 1606 | if ((error = git_str_sets(&relative_path, ref_name)) < 0) |
ac3d33df JK |
1607 | goto cleanup; |
1608 | ||
e579e0f7 MB |
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/")) { | |
ac3d33df | 1613 | |
e579e0f7 | 1614 | git_str_truncate(&relative_path, commonlen); |
ac3d33df | 1615 | |
c25aa7cd | 1616 | if (prefix) |
e579e0f7 | 1617 | error = git_str_join3(&base_path, '/', |
c25aa7cd | 1618 | backend->commonpath, prefix, |
e579e0f7 | 1619 | git_str_cstr(&relative_path)); |
c25aa7cd | 1620 | else |
e579e0f7 | 1621 | error = git_str_joinpath(&base_path, |
c25aa7cd | 1622 | backend->commonpath, |
e579e0f7 | 1623 | git_str_cstr(&relative_path)); |
c25aa7cd PP |
1624 | |
1625 | if (!error) | |
e579e0f7 | 1626 | error = git_path_validate_str_length(NULL, &base_path); |
c25aa7cd PP |
1627 | |
1628 | if (error < 0) | |
1629 | goto cleanup; | |
1630 | ||
1631 | error = git_futils_rmdir_r(ref_name + commonlen, | |
e579e0f7 | 1632 | git_str_cstr(&base_path), |
c25aa7cd | 1633 | GIT_RMDIR_EMPTY_PARENTS | GIT_RMDIR_SKIP_ROOT); |
ac3d33df | 1634 | |
c25aa7cd PP |
1635 | if (error == GIT_ENOTFOUND) |
1636 | error = 0; | |
ac3d33df JK |
1637 | } |
1638 | ||
1639 | cleanup: | |
e579e0f7 MB |
1640 | git_str_dispose(&relative_path); |
1641 | git_str_dispose(&base_path); | |
c25aa7cd | 1642 | return error; |
ac3d33df JK |
1643 | } |
1644 | ||
d00d5464 ET |
1645 | static int refdb_fs_backend__delete( |
1646 | git_refdb_backend *_backend, | |
7ee8c7e6 CMN |
1647 | const char *ref_name, |
1648 | const git_oid *old_id, const char *old_target) | |
d00d5464 | 1649 | { |
22a2d3d5 | 1650 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
77ad6754 | 1651 | git_filebuf file = GIT_FILEBUF_INIT; |
ab8d9242 | 1652 | int error = 0; |
d00d5464 | 1653 | |
c25aa7cd PP |
1654 | GIT_ASSERT_ARG(backend); |
1655 | GIT_ASSERT_ARG(ref_name); | |
d00d5464 | 1656 | |
7ee8c7e6 CMN |
1657 | if ((error = loose_lock(&file, backend, ref_name)) < 0) |
1658 | return error; | |
1659 | ||
01d0c02d CMN |
1660 | if ((error = refdb_reflog_fs__delete(_backend, ref_name)) < 0) { |
1661 | git_filebuf_cleanup(&file); | |
1662 | return error; | |
1663 | } | |
1664 | ||
ab8d9242 CMN |
1665 | return refdb_fs_backend__delete_tail(_backend, &file, ref_name, old_id, old_target); |
1666 | } | |
1667 | ||
22a2d3d5 UG |
1668 | static int loose_delete(refdb_fs_backend *backend, const char *ref_name) |
1669 | { | |
e579e0f7 | 1670 | git_str path = GIT_STR_INIT; |
22a2d3d5 UG |
1671 | int error = 0; |
1672 | ||
c25aa7cd PP |
1673 | if ((error = loose_path(&path, backend->commonpath, ref_name)) < 0) |
1674 | return error; | |
22a2d3d5 | 1675 | |
c25aa7cd | 1676 | error = p_unlink(path.ptr); |
22a2d3d5 UG |
1677 | if (error < 0 && errno == ENOENT) |
1678 | error = GIT_ENOTFOUND; | |
1679 | else if (error != 0) | |
1680 | error = -1; | |
1681 | ||
e579e0f7 | 1682 | git_str_dispose(&path); |
22a2d3d5 UG |
1683 | |
1684 | return error; | |
1685 | } | |
1686 | ||
ab8d9242 CMN |
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 | { | |
22a2d3d5 | 1693 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
ab8d9242 | 1694 | int error = 0, cmp = 0; |
22a2d3d5 | 1695 | bool packed_deleted = 0; |
ab8d9242 | 1696 | |
7ee8c7e6 | 1697 | error = cmp_old_ref(&cmp, _backend, ref_name, old_id, old_target); |
7ee8c7e6 CMN |
1698 | if (error < 0) |
1699 | goto cleanup; | |
1700 | ||
1701 | if (cmp) { | |
ac3d33df | 1702 | git_error_set(GIT_ERROR_REFERENCE, "old reference value does not match"); |
7ee8c7e6 CMN |
1703 | error = GIT_EMODIFIED; |
1704 | goto cleanup; | |
1705 | } | |
1706 | ||
22a2d3d5 UG |
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) | |
7ee8c7e6 | 1725 | goto cleanup; |
d00d5464 | 1726 | |
22a2d3d5 UG |
1727 | if (error == 0) |
1728 | packed_deleted = 1; | |
fe372740 | 1729 | |
22a2d3d5 | 1730 | if ((error = loose_delete(backend, ref_name)) < 0 && error != GIT_ENOTFOUND) |
7ee8c7e6 | 1731 | goto cleanup; |
4e6e2ff2 | 1732 | |
7ee8c7e6 | 1733 | if (error == GIT_ENOTFOUND) { |
22a2d3d5 | 1734 | error = packed_deleted ? 0 : ref_error_notfound(ref_name); |
7ee8c7e6 CMN |
1735 | goto cleanup; |
1736 | } | |
1737 | ||
7ee8c7e6 | 1738 | cleanup: |
ab8d9242 | 1739 | git_filebuf_cleanup(file); |
22a2d3d5 | 1740 | if (error == 0) |
c25aa7cd | 1741 | error = refdb_fs_backend__prune_refs(backend, ref_name, ""); |
7ee8c7e6 | 1742 | return error; |
d00d5464 ET |
1743 | } |
1744 | ||
a57dd3b7 CMN |
1745 | static int refdb_reflog_fs__rename(git_refdb_backend *_backend, const char *old_name, const char *new_name); |
1746 | ||
4e6e2ff2 VM |
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, | |
110df893 | 1752 | int force, |
a57dd3b7 | 1753 | const git_signature *who, |
110df893 | 1754 | const char *message) |
4e6e2ff2 | 1755 | { |
22a2d3d5 UG |
1756 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
1757 | git_reference *old, *new = NULL; | |
a57dd3b7 | 1758 | git_filebuf file = GIT_FILEBUF_INIT; |
4e6e2ff2 VM |
1759 | int error; |
1760 | ||
c25aa7cd | 1761 | GIT_ASSERT_ARG(backend); |
4e6e2ff2 | 1762 | |
fe372740 RB |
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) | |
4e6e2ff2 VM |
1766 | return error; |
1767 | ||
7ee8c7e6 | 1768 | if ((error = refdb_fs_backend__delete(_backend, old_name, NULL, NULL)) < 0) { |
4e6e2ff2 VM |
1769 | git_reference_free(old); |
1770 | return error; | |
1771 | } | |
1772 | ||
22a2d3d5 | 1773 | new = git_reference__realloc(&old, new_name); |
fe372740 RB |
1774 | if (!new) { |
1775 | git_reference_free(old); | |
1776 | return -1; | |
4e6e2ff2 VM |
1777 | } |
1778 | ||
7ee8c7e6 | 1779 | if ((error = loose_lock(&file, backend, new->name)) < 0) { |
a57dd3b7 CMN |
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)) && | |
d578b45f | 1787 | ((error = reflog_append(backend, new, git_reference_target(new), NULL, who, message)) < 0)) { |
a57dd3b7 CMN |
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) { | |
4e6e2ff2 | 1801 | git_reference_free(new); |
fe372740 | 1802 | return error; |
4e6e2ff2 VM |
1803 | } |
1804 | ||
fe372740 | 1805 | *out = new; |
4e6e2ff2 VM |
1806 | return 0; |
1807 | } | |
1808 | ||
d00d5464 ET |
1809 | static int refdb_fs_backend__compress(git_refdb_backend *_backend) |
1810 | { | |
2e09106e | 1811 | int error; |
22a2d3d5 | 1812 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
d00d5464 | 1813 | |
c25aa7cd | 1814 | GIT_ASSERT_ARG(backend); |
d00d5464 | 1815 | |
2e09106e CMN |
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; | |
d00d5464 ET |
1820 | |
1821 | return 0; | |
1822 | } | |
1823 | ||
d00d5464 ET |
1824 | static void refdb_fs_backend__free(git_refdb_backend *_backend) |
1825 | { | |
22a2d3d5 | 1826 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
d00d5464 | 1827 | |
c25aa7cd PP |
1828 | if (!backend) |
1829 | return; | |
d00d5464 | 1830 | |
fe372740 | 1831 | git_sortedcache_free(backend->refcache); |
e579e0f7 MB |
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 | ||
71dd0861 | 1838 | git__free(backend->gitpath); |
e0a6c28e | 1839 | git__free(backend->commonpath); |
d00d5464 ET |
1840 | git__free(backend); |
1841 | } | |
1842 | ||
83580562 | 1843 | static char *setup_namespace(git_repository *repo, const char *in) |
8cddf9b8 | 1844 | { |
e579e0f7 | 1845 | git_str path = GIT_STR_INIT; |
83580562 | 1846 | char *parts, *start, *end, *out = NULL; |
8cddf9b8 | 1847 | |
83580562 ET |
1848 | if (!in) |
1849 | goto done; | |
69a3c766 | 1850 | |
e579e0f7 | 1851 | git_str_puts(&path, in); |
8cddf9b8 VM |
1852 | |
1853 | /* if the repo is not namespaced, nothing else to do */ | |
83580562 | 1854 | if (repo->namespace == NULL) { |
e579e0f7 | 1855 | out = git_str_detach(&path); |
83580562 ET |
1856 | goto done; |
1857 | } | |
8cddf9b8 VM |
1858 | |
1859 | parts = end = git__strdup(repo->namespace); | |
1860 | if (parts == NULL) | |
83580562 | 1861 | goto done; |
8cddf9b8 | 1862 | |
fe372740 | 1863 | /* |
8cddf9b8 VM |
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 | */ | |
83580562 | 1869 | while ((start = git__strsep(&end, "/")) != NULL) |
e579e0f7 | 1870 | git_str_printf(&path, "refs/namespaces/%s/", start); |
8cddf9b8 | 1871 | |
e579e0f7 | 1872 | git_str_printf(&path, "refs/namespaces/%s/refs", end); |
1ed356dc | 1873 | git__free(parts); |
8cddf9b8 VM |
1874 | |
1875 | /* Make sure that the folder with the namespace exists */ | |
e579e0f7 | 1876 | if (git_futils_mkdir_relative(git_str_cstr(&path), in, 0777, |
83580562 ET |
1877 | GIT_MKDIR_PATH, NULL) < 0) |
1878 | goto done; | |
8cddf9b8 | 1879 | |
c25aa7cd | 1880 | /* Return root of the namespaced gitpath, i.e. without the trailing 'refs' */ |
e579e0f7 MB |
1881 | git_str_rtruncate_at_char(&path, '/'); |
1882 | git_str_putc(&path, '/'); | |
1883 | out = git_str_detach(&path); | |
83580562 ET |
1884 | |
1885 | done: | |
e579e0f7 | 1886 | git_str_dispose(&path); |
83580562 | 1887 | return out; |
8cddf9b8 VM |
1888 | } |
1889 | ||
b976f3c2 CMN |
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)); | |
ac3d33df | 1897 | GIT_ERROR_CHECK_ALLOC(log); |
b976f3c2 CMN |
1898 | |
1899 | log->ref_name = git__strdup(name); | |
ac3d33df | 1900 | GIT_ERROR_CHECK_ALLOC(log->ref_name); |
b976f3c2 CMN |
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 | { | |
22a2d3d5 | 1915 | git_parse_ctx parser = GIT_PARSE_CTX_INIT; |
b976f3c2 | 1916 | |
22a2d3d5 UG |
1917 | if ((git_parse_ctx_init(&parser, buf, buf_size)) < 0) |
1918 | return -1; | |
b976f3c2 | 1919 | |
22a2d3d5 UG |
1920 | for (; parser.remain_len; git_parse_advance_line(&parser)) { |
1921 | git_reflog_entry *entry; | |
1922 | const char *sig; | |
1923 | char c; | |
b976f3c2 | 1924 | |
22a2d3d5 UG |
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); | |
b976f3c2 | 1929 | |
22a2d3d5 UG |
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; | |
b976f3c2 | 1934 | |
22a2d3d5 UG |
1935 | sig = parser.line; |
1936 | while (git_parse_peek(&c, &parser, 0) == 0 && c != '\t' && c != '\n') | |
1937 | git_parse_advance_chars(&parser, 1); | |
b976f3c2 | 1938 | |
22a2d3d5 UG |
1939 | if (git_signature__parse(entry->committer, &sig, parser.line, NULL, 0) < 0) |
1940 | goto next; | |
b976f3c2 | 1941 | |
22a2d3d5 UG |
1942 | if (c == '\t') { |
1943 | size_t len; | |
1944 | git_parse_advance_chars(&parser, 1); | |
b976f3c2 | 1945 | |
22a2d3d5 UG |
1946 | len = parser.line_len; |
1947 | if (parser.line[len - 1] == '\n') | |
1948 | len--; | |
b976f3c2 | 1949 | |
22a2d3d5 | 1950 | entry->msg = git__strndup(parser.line, len); |
ac3d33df | 1951 | GIT_ERROR_CHECK_ALLOC(entry->msg); |
22a2d3d5 | 1952 | } |
b976f3c2 | 1953 | |
22a2d3d5 UG |
1954 | if ((git_vector_insert(&log->entries, entry)) < 0) { |
1955 | git_reflog_entry__free(entry); | |
1956 | return -1; | |
1957 | } | |
b976f3c2 | 1958 | |
22a2d3d5 UG |
1959 | continue; |
1960 | ||
1961 | next: | |
1962 | git_reflog_entry__free(entry); | |
b976f3c2 CMN |
1963 | } |
1964 | ||
1965 | return 0; | |
b976f3c2 CMN |
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, | |
8d5ec910 | 1976 | O_WRONLY | O_CREAT, |
b976f3c2 CMN |
1977 | GIT_REFLOG_FILE_MODE)) < 0) |
1978 | return -1; | |
1979 | ||
1980 | return p_close(fd); | |
1981 | } | |
1982 | ||
8d5ec910 CMN |
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; | |
e579e0f7 | 1987 | git_str path = GIT_STR_INIT; |
8d5ec910 CMN |
1988 | int error; |
1989 | ||
c25aa7cd | 1990 | GIT_ASSERT_ARG(_backend && name); |
8d5ec910 | 1991 | |
22a2d3d5 | 1992 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
8d5ec910 CMN |
1993 | repo = backend->repo; |
1994 | ||
c25aa7cd | 1995 | if ((error = reflog_path(&path, repo, name)) < 0) |
8d5ec910 CMN |
1996 | return error; |
1997 | ||
e579e0f7 MB |
1998 | error = create_new_reflog_file(git_str_cstr(&path)); |
1999 | git_str_dispose(&path); | |
ae32c54e CMN |
2000 | |
2001 | return error; | |
8d5ec910 CMN |
2002 | } |
2003 | ||
6f13a305 CMN |
2004 | static int has_reflog(git_repository *repo, const char *name) |
2005 | { | |
2006 | int ret = 0; | |
e579e0f7 | 2007 | git_str path = GIT_STR_INIT; |
6f13a305 | 2008 | |
c25aa7cd | 2009 | if (reflog_path(&path, repo, name) < 0) |
6f13a305 CMN |
2010 | goto cleanup; |
2011 | ||
e579e0f7 | 2012 | ret = git_fs_path_isfile(git_str_cstr(&path)); |
6f13a305 CMN |
2013 | |
2014 | cleanup: | |
e579e0f7 | 2015 | git_str_dispose(&path); |
6f13a305 CMN |
2016 | return ret; |
2017 | } | |
2018 | ||
f2105129 CMN |
2019 | static int refdb_reflog_fs__has_log(git_refdb_backend *_backend, const char *name) |
2020 | { | |
2021 | refdb_fs_backend *backend; | |
2022 | ||
c25aa7cd PP |
2023 | GIT_ASSERT_ARG(_backend); |
2024 | GIT_ASSERT_ARG(name); | |
f2105129 | 2025 | |
22a2d3d5 | 2026 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
f2105129 CMN |
2027 | |
2028 | return has_reflog(backend->repo, name); | |
2029 | } | |
2030 | ||
b976f3c2 CMN |
2031 | static int refdb_reflog_fs__read(git_reflog **out, git_refdb_backend *_backend, const char *name) |
2032 | { | |
2033 | int error = -1; | |
e579e0f7 MB |
2034 | git_str log_path = GIT_STR_INIT; |
2035 | git_str log_file = GIT_STR_INIT; | |
b976f3c2 CMN |
2036 | git_reflog *log = NULL; |
2037 | git_repository *repo; | |
2038 | refdb_fs_backend *backend; | |
2039 | ||
c25aa7cd PP |
2040 | GIT_ASSERT_ARG(out); |
2041 | GIT_ASSERT_ARG(_backend); | |
2042 | GIT_ASSERT_ARG(name); | |
b976f3c2 | 2043 | |
22a2d3d5 | 2044 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
b976f3c2 CMN |
2045 | repo = backend->repo; |
2046 | ||
2047 | if (reflog_alloc(&log, name) < 0) | |
2048 | return -1; | |
2049 | ||
c25aa7cd | 2050 | if (reflog_path(&log_path, repo, name) < 0) |
b976f3c2 CMN |
2051 | goto cleanup; |
2052 | ||
e579e0f7 | 2053 | error = git_futils_readbuffer(&log_file, git_str_cstr(&log_path)); |
b976f3c2 CMN |
2054 | if (error < 0 && error != GIT_ENOTFOUND) |
2055 | goto cleanup; | |
2056 | ||
2057 | if ((error == GIT_ENOTFOUND) && | |
e579e0f7 | 2058 | ((error = create_new_reflog_file(git_str_cstr(&log_path))) < 0)) |
b976f3c2 | 2059 | goto cleanup; |
ac3d33df | 2060 | |
b976f3c2 | 2061 | if ((error = reflog_parse(log, |
e579e0f7 | 2062 | git_str_cstr(&log_file), git_str_len(&log_file))) < 0) |
b976f3c2 CMN |
2063 | goto cleanup; |
2064 | ||
2065 | *out = log; | |
2066 | goto success; | |
2067 | ||
2068 | cleanup: | |
2069 | git_reflog_free(log); | |
2070 | ||
2071 | success: | |
e579e0f7 MB |
2072 | git_str_dispose(&log_file); |
2073 | git_str_dispose(&log_path); | |
b976f3c2 CMN |
2074 | |
2075 | return error; | |
2076 | } | |
2077 | ||
2078 | static int serialize_reflog_entry( | |
e579e0f7 | 2079 | git_str *buf, |
b976f3c2 CMN |
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 | ||
e579e0f7 | 2091 | git_str_clear(buf); |
b976f3c2 | 2092 | |
e579e0f7 MB |
2093 | git_str_puts(buf, raw_old); |
2094 | git_str_putc(buf, ' '); | |
2095 | git_str_puts(buf, raw_new); | |
b976f3c2 CMN |
2096 | |
2097 | git_signature__writebuf(buf, " ", committer); | |
2098 | ||
2099 | /* drop trailing LF */ | |
e579e0f7 | 2100 | git_str_rtrim(buf); |
b976f3c2 CMN |
2101 | |
2102 | if (msg) { | |
22a2d3d5 UG |
2103 | size_t i; |
2104 | ||
e579e0f7 MB |
2105 | git_str_putc(buf, '\t'); |
2106 | git_str_puts(buf, msg); | |
22a2d3d5 UG |
2107 | |
2108 | for (i = 0; i < buf->size - 2; i++) | |
2109 | if (buf->ptr[i] == '\n') | |
2110 | buf->ptr[i] = ' '; | |
e579e0f7 | 2111 | git_str_rtrim(buf); |
b976f3c2 CMN |
2112 | } |
2113 | ||
e579e0f7 | 2114 | git_str_putc(buf, '\n'); |
b976f3c2 | 2115 | |
e579e0f7 | 2116 | return git_str_oom(buf); |
b976f3c2 CMN |
2117 | } |
2118 | ||
110df893 CMN |
2119 | static int lock_reflog(git_filebuf *file, refdb_fs_backend *backend, const char *refname) |
2120 | { | |
2121 | git_repository *repo; | |
e579e0f7 | 2122 | git_str log_path = GIT_STR_INIT; |
110df893 CMN |
2123 | int error; |
2124 | ||
2125 | repo = backend->repo; | |
2126 | ||
e579e0f7 | 2127 | if (!git_path_is_valid(backend->repo, refname, 0, GIT_FS_PATH_REJECT_FILESYSTEM_DEFAULTS)) { |
ac3d33df | 2128 | git_error_set(GIT_ERROR_INVALID, "invalid reference name '%s'", refname); |
a64119e3 ET |
2129 | return GIT_EINVALIDSPEC; |
2130 | } | |
2131 | ||
c25aa7cd | 2132 | if (reflog_path(&log_path, repo, refname) < 0) |
110df893 CMN |
2133 | return -1; |
2134 | ||
e579e0f7 | 2135 | if (!git_fs_path_isfile(git_str_cstr(&log_path))) { |
ac3d33df | 2136 | git_error_set(GIT_ERROR_INVALID, |
909d5494 | 2137 | "log file for reference '%s' doesn't exist", refname); |
110df893 CMN |
2138 | error = -1; |
2139 | goto cleanup; | |
2140 | } | |
2141 | ||
e579e0f7 | 2142 | error = git_filebuf_open(file, git_str_cstr(&log_path), 0, GIT_REFLOG_FILE_MODE); |
110df893 CMN |
2143 | |
2144 | cleanup: | |
e579e0f7 | 2145 | git_str_dispose(&log_path); |
110df893 CMN |
2146 | |
2147 | return error; | |
2148 | } | |
2149 | ||
b976f3c2 CMN |
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; | |
b976f3c2 | 2155 | refdb_fs_backend *backend; |
e579e0f7 | 2156 | git_str log = GIT_STR_INIT; |
b976f3c2 CMN |
2157 | git_filebuf fbuf = GIT_FILEBUF_INIT; |
2158 | ||
c25aa7cd PP |
2159 | GIT_ASSERT_ARG(_backend); |
2160 | GIT_ASSERT_ARG(reflog); | |
b976f3c2 | 2161 | |
22a2d3d5 | 2162 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
b976f3c2 | 2163 | |
110df893 | 2164 | if ((error = lock_reflog(&fbuf, backend, reflog->ref_name)) < 0) |
b976f3c2 CMN |
2165 | return -1; |
2166 | ||
b976f3c2 CMN |
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 | ||
1d3a8aeb | 2175 | error = git_filebuf_commit(&fbuf); |
b976f3c2 CMN |
2176 | goto success; |
2177 | ||
2178 | cleanup: | |
2179 | git_filebuf_cleanup(&fbuf); | |
2180 | ||
2181 | success: | |
e579e0f7 | 2182 | git_str_dispose(&log); |
110df893 | 2183 | |
b976f3c2 CMN |
2184 | return error; |
2185 | } | |
2186 | ||
a57dd3b7 | 2187 | /* Append to the reflog, must be called under reference lock */ |
4b7e1b9e | 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) |
a57dd3b7 | 2189 | { |
af3dcb0e | 2190 | int error, is_symbolic, open_flags; |
4b7e1b9e | 2191 | git_oid old_id = {{0}}, new_id = {{0}}; |
e579e0f7 | 2192 | git_str buf = GIT_STR_INIT, path = GIT_STR_INIT; |
a57dd3b7 CMN |
2193 | git_repository *repo = backend->repo; |
2194 | ||
ac3d33df | 2195 | is_symbolic = ref->type == GIT_REFERENCE_SYMBOLIC; |
4b7e1b9e CMN |
2196 | |
2197 | /* "normal" symbolic updates do not write */ | |
2198 | if (is_symbolic && | |
2199 | strcmp(ref->name, GIT_HEAD_FILE) && | |
2200 | !(old && new)) | |
a57dd3b7 CMN |
2201 | return 0; |
2202 | ||
22a2d3d5 | 2203 | /* From here on is_symbolic also means that it's HEAD */ |
4b7e1b9e CMN |
2204 | |
2205 | if (old) { | |
2206 | git_oid_cpy(&old_id, old); | |
afc57eb4 | 2207 | } else { |
4b7e1b9e | 2208 | error = git_reference_name_to_id(&old_id, repo, ref->name); |
afc57eb4 | 2209 | if (error < 0 && error != GIT_ENOTFOUND) |
4b7e1b9e CMN |
2210 | return error; |
2211 | } | |
2212 | ||
6aaae94a CMN |
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; | |
4b7e1b9e | 2225 | |
ac3d33df | 2226 | git_error_clear(); |
6aaae94a | 2227 | } |
7f058b86 | 2228 | } |
4b7e1b9e | 2229 | |
a57dd3b7 CMN |
2230 | if ((error = serialize_reflog_entry(&buf, &old_id, &new_id, who, message)) < 0) |
2231 | goto cleanup; | |
2232 | ||
c25aa7cd | 2233 | if ((error = reflog_path(&path, repo, ref->name)) < 0) |
a57dd3b7 CMN |
2234 | goto cleanup; |
2235 | ||
e579e0f7 | 2236 | if (((error = git_futils_mkpath2file(git_str_cstr(&path), 0777)) < 0) && |
a57dd3b7 CMN |
2237 | (error != GIT_EEXISTS)) { |
2238 | goto cleanup; | |
2239 | } | |
2240 | ||
1589a93a JH |
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 | */ | |
e579e0f7 MB |
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) { | |
ce5553d4 CMN |
2246 | if (error == GIT_ENOTFOUND) |
2247 | error = 0; | |
e579e0f7 | 2248 | } else if (git_fs_path_isdir(git_str_cstr(&path))) { |
ac3d33df | 2249 | git_error_set(GIT_ERROR_REFERENCE, "cannot create reflog at '%s', there are reflogs beneath that folder", |
0a700ee3 ET |
2250 | ref->name); |
2251 | error = GIT_EDIRECTORY; | |
2252 | } | |
2253 | ||
2254 | if (error != 0) | |
2255 | goto cleanup; | |
1589a93a JH |
2256 | } |
2257 | ||
af3dcb0e ET |
2258 | open_flags = O_WRONLY | O_CREAT | O_APPEND; |
2259 | ||
1c04a96b | 2260 | if (backend->fsync) |
af3dcb0e ET |
2261 | open_flags |= O_FSYNC; |
2262 | ||
e579e0f7 | 2263 | error = git_futils_writebuffer(&buf, git_str_cstr(&path), open_flags, GIT_REFLOG_FILE_MODE); |
a57dd3b7 CMN |
2264 | |
2265 | cleanup: | |
e579e0f7 MB |
2266 | git_str_dispose(&buf); |
2267 | git_str_dispose(&path); | |
a57dd3b7 | 2268 | |
b976f3c2 CMN |
2269 | return error; |
2270 | } | |
2271 | ||
b976f3c2 CMN |
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; | |
e579e0f7 MB |
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; | |
b976f3c2 CMN |
2279 | git_repository *repo; |
2280 | refdb_fs_backend *backend; | |
2281 | ||
c25aa7cd PP |
2282 | GIT_ASSERT_ARG(_backend); |
2283 | GIT_ASSERT_ARG(old_name); | |
2284 | GIT_ASSERT_ARG(new_name); | |
b976f3c2 | 2285 | |
22a2d3d5 | 2286 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
b976f3c2 CMN |
2287 | repo = backend->repo; |
2288 | ||
2289 | if ((error = git_reference__normalize_name( | |
ac3d33df | 2290 | &normalized, new_name, GIT_REFERENCE_FORMAT_ALLOW_ONELEVEL)) < 0) |
b976f3c2 CMN |
2291 | return error; |
2292 | ||
e579e0f7 | 2293 | if (git_str_joinpath(&temp_path, repo->gitdir, GIT_REFLOG_DIR) < 0) |
b976f3c2 CMN |
2294 | return -1; |
2295 | ||
e579e0f7 | 2296 | if ((error = loose_path(&old_path, git_str_cstr(&temp_path), old_name)) < 0) |
c25aa7cd | 2297 | return error; |
b976f3c2 | 2298 | |
e579e0f7 | 2299 | if ((error = loose_path(&new_path, git_str_cstr(&temp_path), git_str_cstr(&normalized))) < 0) |
c25aa7cd | 2300 | return error; |
b976f3c2 | 2301 | |
e579e0f7 | 2302 | if (!git_fs_path_exists(git_str_cstr(&old_path))) { |
a57dd3b7 CMN |
2303 | error = GIT_ENOTFOUND; |
2304 | goto cleanup; | |
2305 | } | |
2306 | ||
b976f3c2 CMN |
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 | */ | |
e579e0f7 | 2314 | if ((error = loose_path(&temp_path, git_str_cstr(&temp_path), "temp_reflog")) < 0) |
c25aa7cd | 2315 | return error; |
b976f3c2 | 2316 | |
e579e0f7 | 2317 | if ((fd = git_futils_mktmp(&temp_path, git_str_cstr(&temp_path), GIT_REFLOG_FILE_MODE)) < 0) { |
b976f3c2 CMN |
2318 | error = -1; |
2319 | goto cleanup; | |
2320 | } | |
2321 | ||
2322 | p_close(fd); | |
2323 | ||
e579e0f7 | 2324 | if (p_rename(git_str_cstr(&old_path), git_str_cstr(&temp_path)) < 0) { |
ac3d33df | 2325 | git_error_set(GIT_ERROR_OS, "failed to rename reflog for %s", new_name); |
b976f3c2 CMN |
2326 | error = -1; |
2327 | goto cleanup; | |
2328 | } | |
2329 | ||
e579e0f7 MB |
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)) { | |
b976f3c2 CMN |
2332 | error = -1; |
2333 | goto cleanup; | |
2334 | } | |
2335 | ||
e579e0f7 | 2336 | if (git_futils_mkpath2file(git_str_cstr(&new_path), GIT_REFLOG_DIR_MODE) < 0) { |
b976f3c2 CMN |
2337 | error = -1; |
2338 | goto cleanup; | |
2339 | } | |
2340 | ||
e579e0f7 | 2341 | if (p_rename(git_str_cstr(&temp_path), git_str_cstr(&new_path)) < 0) { |
ac3d33df | 2342 | git_error_set(GIT_ERROR_OS, "failed to rename reflog for %s", new_name); |
b976f3c2 CMN |
2343 | error = -1; |
2344 | } | |
2345 | ||
2346 | cleanup: | |
e579e0f7 MB |
2347 | git_str_dispose(&temp_path); |
2348 | git_str_dispose(&old_path); | |
2349 | git_str_dispose(&new_path); | |
2350 | git_str_dispose(&normalized); | |
b976f3c2 CMN |
2351 | |
2352 | return error; | |
2353 | } | |
2354 | ||
b976f3c2 CMN |
2355 | static int refdb_reflog_fs__delete(git_refdb_backend *_backend, const char *name) |
2356 | { | |
22a2d3d5 | 2357 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
e579e0f7 | 2358 | git_str path = GIT_STR_INIT; |
ac3d33df | 2359 | int error; |
b976f3c2 | 2360 | |
c25aa7cd PP |
2361 | GIT_ASSERT_ARG(_backend); |
2362 | GIT_ASSERT_ARG(name); | |
b976f3c2 | 2363 | |
c25aa7cd | 2364 | if ((error = reflog_path(&path, backend->repo, name)) < 0) |
ac3d33df JK |
2365 | goto out; |
2366 | ||
e579e0f7 | 2367 | if (!git_fs_path_exists(path.ptr)) |
ac3d33df | 2368 | goto out; |
b976f3c2 | 2369 | |
ac3d33df JK |
2370 | if ((error = p_unlink(path.ptr)) < 0) |
2371 | goto out; | |
b976f3c2 | 2372 | |
c25aa7cd | 2373 | error = refdb_fs_backend__prune_refs(backend, name, GIT_REFLOG_DIR); |
b976f3c2 | 2374 | |
ac3d33df | 2375 | out: |
e579e0f7 | 2376 | git_str_dispose(&path); |
b976f3c2 CMN |
2377 | |
2378 | return error; | |
b976f3c2 CMN |
2379 | } |
2380 | ||
d00d5464 ET |
2381 | int git_refdb_backend_fs( |
2382 | git_refdb_backend **backend_out, | |
4e4eab52 | 2383 | git_repository *repository) |
d00d5464 | 2384 | { |
219d3457 | 2385 | int t = 0; |
e579e0f7 | 2386 | git_str gitpath = GIT_STR_INIT; |
d00d5464 ET |
2387 | refdb_fs_backend *backend; |
2388 | ||
2389 | backend = git__calloc(1, sizeof(refdb_fs_backend)); | |
ac3d33df | 2390 | GIT_ERROR_CHECK_ALLOC(backend); |
e579e0f7 MB |
2391 | if (git_mutex_init(&backend->prlock) < 0) { |
2392 | git__free(backend); | |
2393 | return -1; | |
2394 | } | |
2395 | ||
d00d5464 | 2396 | |
22a2d3d5 UG |
2397 | if (git_refdb_init_backend(&backend->parent, GIT_REFDB_BACKEND_VERSION) < 0) |
2398 | goto fail; | |
2399 | ||
d00d5464 | 2400 | backend->repo = repository; |
bade5194 | 2401 | |
83580562 ET |
2402 | if (repository->gitdir) { |
2403 | backend->gitpath = setup_namespace(repository, repository->gitdir); | |
bade5194 | 2404 | |
83580562 ET |
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 | } | |
d00d5464 | 2415 | |
e579e0f7 | 2416 | if (git_str_joinpath(&gitpath, backend->commonpath, GIT_PACKEDREFS_FILE) < 0 || |
fe372740 RB |
2417 | git_sortedcache_new( |
2418 | &backend->refcache, offsetof(struct packref, name), | |
e579e0f7 | 2419 | NULL, NULL, packref_cmp, git_str_cstr(&gitpath)) < 0) |
fe372740 RB |
2420 | goto fail; |
2421 | ||
e579e0f7 | 2422 | git_str_dispose(&gitpath); |
fe372740 | 2423 | |
22a2d3d5 | 2424 | if (!git_repository__configmap_lookup(&t, backend->repo, GIT_CONFIGMAP_IGNORECASE) && t) { |
219d3457 | 2425 | backend->iterator_flags |= GIT_ITERATOR_IGNORE_CASE; |
e579e0f7 | 2426 | backend->direach_flags |= GIT_FS_PATH_DIR_IGNORE_CASE; |
219d3457 | 2427 | } |
22a2d3d5 | 2428 | if (!git_repository__configmap_lookup(&t, backend->repo, GIT_CONFIGMAP_PRECOMPOSE) && t) { |
219d3457 | 2429 | backend->iterator_flags |= GIT_ITERATOR_PRECOMPOSE_UNICODE; |
e579e0f7 | 2430 | backend->direach_flags |= GIT_FS_PATH_DIR_PRECOMPOSE_UNICODE; |
219d3457 | 2431 | } |
22a2d3d5 | 2432 | if ((!git_repository__configmap_lookup(&t, backend->repo, GIT_CONFIGMAP_FSYNCOBJECTFILES) && t) || |
6c23704d | 2433 | git_repository__fsync_gitdir) |
1c04a96b | 2434 | backend->fsync = 1; |
eae0bfdc | 2435 | backend->iterator_flags |= GIT_ITERATOR_DESCEND_SYMLINKS; |
219d3457 | 2436 | |
d00d5464 ET |
2437 | backend->parent.exists = &refdb_fs_backend__exists; |
2438 | backend->parent.lookup = &refdb_fs_backend__lookup; | |
4def7035 | 2439 | backend->parent.iterator = &refdb_fs_backend__iterator; |
d00d5464 | 2440 | backend->parent.write = &refdb_fs_backend__write; |
e3f3868a | 2441 | backend->parent.del = &refdb_fs_backend__delete; |
4e6e2ff2 | 2442 | backend->parent.rename = &refdb_fs_backend__rename; |
d00d5464 | 2443 | backend->parent.compress = &refdb_fs_backend__compress; |
ab8d9242 CMN |
2444 | backend->parent.lock = &refdb_fs_backend__lock; |
2445 | backend->parent.unlock = &refdb_fs_backend__unlock; | |
f2105129 | 2446 | backend->parent.has_log = &refdb_reflog_fs__has_log; |
8d5ec910 | 2447 | backend->parent.ensure_log = &refdb_reflog_fs__ensure_log; |
d00d5464 | 2448 | backend->parent.free = &refdb_fs_backend__free; |
b976f3c2 CMN |
2449 | backend->parent.reflog_read = &refdb_reflog_fs__read; |
2450 | backend->parent.reflog_write = &refdb_reflog_fs__write; | |
b976f3c2 | 2451 | backend->parent.reflog_rename = &refdb_reflog_fs__rename; |
b976f3c2 | 2452 | backend->parent.reflog_delete = &refdb_reflog_fs__delete; |
d00d5464 ET |
2453 | |
2454 | *backend_out = (git_refdb_backend *)backend; | |
2455 | return 0; | |
fe372740 RB |
2456 | |
2457 | fail: | |
e579e0f7 MB |
2458 | git_mutex_free(&backend->prlock); |
2459 | git_str_dispose(&gitpath); | |
71dd0861 | 2460 | git__free(backend->gitpath); |
e0a6c28e | 2461 | git__free(backend->commonpath); |
fe372740 RB |
2462 | git__free(backend); |
2463 | return -1; | |
d00d5464 | 2464 | } |