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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 | ||
eae0bfdc PP |
8 | #include "refdb_fs.h" |
9 | ||
d00d5464 ET |
10 | #include "refs.h" |
11 | #include "hash.h" | |
12 | #include "repository.h" | |
0c9c969a | 13 | #include "futils.h" |
114f5a6c | 14 | #include "filebuf.h" |
d00d5464 | 15 | #include "pack.h" |
0c9c969a | 16 | #include "parse.h" |
d00d5464 | 17 | #include "reflog.h" |
d00d5464 | 18 | #include "refdb.h" |
4def7035 | 19 | #include "iterator.h" |
fe372740 | 20 | #include "sortedcache.h" |
b976f3c2 | 21 | #include "signature.h" |
0c9c969a | 22 | #include "wildmatch.h" |
d00d5464 ET |
23 | |
24 | #include <git2/tag.h> | |
25 | #include <git2/object.h> | |
26 | #include <git2/refdb.h> | |
4b7e1b9e | 27 | #include <git2/branch.h> |
4dcd8780 | 28 | #include <git2/sys/refdb_backend.h> |
21ca0451 | 29 | #include <git2/sys/refs.h> |
b976f3c2 | 30 | #include <git2/sys/reflog.h> |
d00d5464 | 31 | |
d00d5464 ET |
32 | #define DEFAULT_NESTING_LEVEL 5 |
33 | #define MAX_NESTING_LEVEL 10 | |
34 | ||
35 | enum { | |
f69db390 VM |
36 | PACKREF_HAS_PEEL = 1, |
37 | PACKREF_WAS_LOOSE = 2, | |
2638a03a VM |
38 | PACKREF_CANNOT_PEEL = 4, |
39 | PACKREF_SHADOWED = 8, | |
f69db390 VM |
40 | }; |
41 | ||
42 | enum { | |
43 | PEELING_NONE = 0, | |
44 | PEELING_STANDARD, | |
45 | PEELING_FULL | |
d00d5464 ET |
46 | }; |
47 | ||
48 | struct packref { | |
49 | git_oid oid; | |
50 | git_oid peel; | |
51 | char flags; | |
52 | char name[GIT_FLEX_ARRAY]; | |
53 | }; | |
54 | ||
55 | typedef struct refdb_fs_backend { | |
56 | git_refdb_backend parent; | |
57 | ||
58 | git_repository *repo; | |
71dd0861 PS |
59 | /* path to git directory */ |
60 | char *gitpath; | |
e0a6c28e PS |
61 | /* path to common objects' directory */ |
62 | char *commonpath; | |
d00d5464 | 63 | |
fe372740 | 64 | git_sortedcache *refcache; |
f69db390 | 65 | int peeling_mode; |
219d3457 RB |
66 | git_iterator_flag_t iterator_flags; |
67 | uint32_t direach_flags; | |
1c04a96b | 68 | int fsync; |
d00d5464 ET |
69 | } refdb_fs_backend; |
70 | ||
01d0c02d CMN |
71 | static int refdb_reflog_fs__delete(git_refdb_backend *_backend, const char *name); |
72 | ||
fe372740 | 73 | static int packref_cmp(const void *a_, const void *b_) |
d00d5464 | 74 | { |
fe372740 RB |
75 | const struct packref *a = a_, *b = b_; |
76 | return strcmp(a->name, b->name); | |
d00d5464 ET |
77 | } |
78 | ||
fe372740 | 79 | static int packed_reload(refdb_fs_backend *backend) |
d00d5464 | 80 | { |
fe372740 RB |
81 | int error; |
82 | git_buf packedrefs = GIT_BUF_INIT; | |
83 | char *scan, *eof, *eol; | |
4dcd8780 | 84 | |
71dd0861 | 85 | if (!backend->gitpath) |
69a3c766 CMN |
86 | return 0; |
87 | ||
fe372740 | 88 | error = git_sortedcache_lockandload(backend->refcache, &packedrefs); |
d00d5464 ET |
89 | |
90 | /* | |
fe372740 RB |
91 | * If we can't find the packed-refs, clear table and return. |
92 | * Any other error just gets passed through. | |
93 | * If no error, and file wasn't changed, just return. | |
94 | * Anything else means we need to refresh the packed refs. | |
d00d5464 | 95 | */ |
fe372740 RB |
96 | if (error <= 0) { |
97 | if (error == GIT_ENOTFOUND) { | |
98 | git_sortedcache_clear(backend->refcache, true); | |
ac3d33df | 99 | git_error_clear(); |
fe372740 RB |
100 | error = 0; |
101 | } | |
102 | return error; | |
d00d5464 ET |
103 | } |
104 | ||
fe372740 | 105 | /* At this point, refresh the packed refs from the loaded buffer. */ |
d00d5464 | 106 | |
fe372740 | 107 | git_sortedcache_clear(backend->refcache, false); |
d00d5464 | 108 | |
fe372740 RB |
109 | scan = (char *)packedrefs.ptr; |
110 | eof = scan + packedrefs.size; | |
d00d5464 | 111 | |
f69db390 VM |
112 | backend->peeling_mode = PEELING_NONE; |
113 | ||
fe372740 | 114 | if (*scan == '#') { |
1fed6b07 | 115 | static const char *traits_header = "# pack-refs with: "; |
f69db390 | 116 | |
fe372740 RB |
117 | if (git__prefixcmp(scan, traits_header) == 0) { |
118 | scan += strlen(traits_header); | |
119 | eol = strchr(scan, '\n'); | |
822645f6 | 120 | |
fe372740 | 121 | if (!eol) |
822645f6 | 122 | goto parse_failed; |
fe372740 | 123 | *eol = '\0'; |
822645f6 | 124 | |
fe372740 | 125 | if (strstr(scan, " fully-peeled ") != NULL) { |
f69db390 | 126 | backend->peeling_mode = PEELING_FULL; |
fe372740 | 127 | } else if (strstr(scan, " peeled ") != NULL) { |
f69db390 VM |
128 | backend->peeling_mode = PEELING_STANDARD; |
129 | } | |
130 | ||
fe372740 | 131 | scan = eol + 1; |
f69db390 VM |
132 | } |
133 | } | |
134 | ||
fe372740 RB |
135 | while (scan < eof && *scan == '#') { |
136 | if (!(eol = strchr(scan, '\n'))) | |
d00d5464 | 137 | goto parse_failed; |
fe372740 | 138 | scan = eol + 1; |
d00d5464 ET |
139 | } |
140 | ||
fe372740 RB |
141 | while (scan < eof) { |
142 | struct packref *ref; | |
143 | git_oid oid; | |
144 | ||
145 | /* parse "<OID> <refname>\n" */ | |
d00d5464 | 146 | |
fe372740 | 147 | if (git_oid_fromstr(&oid, scan) < 0) |
d00d5464 | 148 | goto parse_failed; |
fe372740 | 149 | scan += GIT_OID_HEXSZ; |
d00d5464 | 150 | |
fe372740 RB |
151 | if (*scan++ != ' ') |
152 | goto parse_failed; | |
153 | if (!(eol = strchr(scan, '\n'))) | |
154 | goto parse_failed; | |
155 | *eol = '\0'; | |
156 | if (eol[-1] == '\r') | |
157 | eol[-1] = '\0'; | |
d00d5464 | 158 | |
fe372740 | 159 | if (git_sortedcache_upsert((void **)&ref, backend->refcache, scan) < 0) |
d00d5464 | 160 | goto parse_failed; |
fe372740 RB |
161 | scan = eol + 1; |
162 | ||
163 | git_oid_cpy(&ref->oid, &oid); | |
164 | ||
165 | /* look for optional "^<OID>\n" */ | |
166 | ||
167 | if (*scan == '^') { | |
168 | if (git_oid_fromstr(&oid, scan + 1) < 0) | |
169 | goto parse_failed; | |
170 | scan += GIT_OID_HEXSZ + 1; | |
171 | ||
172 | if (scan < eof) { | |
173 | if (!(eol = strchr(scan, '\n'))) | |
174 | goto parse_failed; | |
175 | scan = eol + 1; | |
176 | } | |
177 | ||
178 | git_oid_cpy(&ref->peel, &oid); | |
179 | ref->flags |= PACKREF_HAS_PEEL; | |
180 | } | |
181 | else if (backend->peeling_mode == PEELING_FULL || | |
182 | (backend->peeling_mode == PEELING_STANDARD && | |
183 | git__prefixcmp(ref->name, GIT_REFS_TAGS_DIR) == 0)) | |
184 | ref->flags |= PACKREF_CANNOT_PEEL; | |
d00d5464 ET |
185 | } |
186 | ||
8d9a85d4 | 187 | git_sortedcache_wunlock(backend->refcache); |
ac3d33df | 188 | git_buf_dispose(&packedrefs); |
fe372740 | 189 | |
d00d5464 ET |
190 | return 0; |
191 | ||
192 | parse_failed: | |
ac3d33df | 193 | git_error_set(GIT_ERROR_REFERENCE, "corrupted packed references file"); |
fe372740 RB |
194 | |
195 | git_sortedcache_clear(backend->refcache, false); | |
8d9a85d4 | 196 | git_sortedcache_wunlock(backend->refcache); |
ac3d33df | 197 | git_buf_dispose(&packedrefs); |
fe372740 | 198 | |
d00d5464 ET |
199 | return -1; |
200 | } | |
201 | ||
fe372740 RB |
202 | static int loose_parse_oid( |
203 | git_oid *oid, const char *filename, git_buf *file_content) | |
d00d5464 | 204 | { |
fe372740 | 205 | const char *str = git_buf_cstr(file_content); |
d00d5464 | 206 | |
fe372740 | 207 | if (git_buf_len(file_content) < GIT_OID_HEXSZ) |
d00d5464 ET |
208 | goto corrupted; |
209 | ||
d00d5464 | 210 | /* we need to get 40 OID characters from the file */ |
fe372740 | 211 | if (git_oid_fromstr(oid, str) < 0) |
d00d5464 ET |
212 | goto corrupted; |
213 | ||
214 | /* If the file is longer than 40 chars, the 41st must be a space */ | |
215 | str += GIT_OID_HEXSZ; | |
216 | if (*str == '\0' || git__isspace(*str)) | |
217 | return 0; | |
218 | ||
219 | corrupted: | |
ac3d33df | 220 | git_error_set(GIT_ERROR_REFERENCE, "corrupted loose reference file: %s", filename); |
d00d5464 ET |
221 | return -1; |
222 | } | |
223 | ||
fe372740 RB |
224 | static int loose_readbuffer(git_buf *buf, const char *base, const char *path) |
225 | { | |
226 | int error; | |
227 | ||
228 | /* build full path to file */ | |
229 | if ((error = git_buf_joinpath(buf, base, path)) < 0 || | |
230 | (error = git_futils_readbuffer(buf, buf->ptr)) < 0) | |
ac3d33df | 231 | git_buf_dispose(buf); |
fe372740 RB |
232 | |
233 | return error; | |
234 | } | |
235 | ||
236 | static int loose_lookup_to_packfile(refdb_fs_backend *backend, const char *name) | |
d00d5464 | 237 | { |
fe372740 | 238 | int error = 0; |
d00d5464 ET |
239 | git_buf ref_file = GIT_BUF_INIT; |
240 | struct packref *ref = NULL; | |
fe372740 | 241 | git_oid oid; |
d00d5464 | 242 | |
fe372740 RB |
243 | /* if we fail to load the loose reference, assume someone changed |
244 | * the filesystem under us and skip it... | |
245 | */ | |
71dd0861 | 246 | if (loose_readbuffer(&ref_file, backend->gitpath, name) < 0) { |
ac3d33df | 247 | git_error_clear(); |
fe372740 RB |
248 | goto done; |
249 | } | |
d00d5464 | 250 | |
0f0f5655 | 251 | /* skip symbolic refs */ |
fe372740 RB |
252 | if (!git__prefixcmp(git_buf_cstr(&ref_file), GIT_SYMREF)) |
253 | goto done; | |
0f0f5655 | 254 | |
fe372740 RB |
255 | /* parse OID from file */ |
256 | if ((error = loose_parse_oid(&oid, name, &ref_file)) < 0) | |
257 | goto done; | |
d00d5464 | 258 | |
8d9a85d4 | 259 | git_sortedcache_wlock(backend->refcache); |
d00d5464 | 260 | |
fe372740 RB |
261 | if (!(error = git_sortedcache_upsert( |
262 | (void **)&ref, backend->refcache, name))) { | |
d00d5464 | 263 | |
fe372740 RB |
264 | git_oid_cpy(&ref->oid, &oid); |
265 | ref->flags = PACKREF_WAS_LOOSE; | |
d00d5464 ET |
266 | } |
267 | ||
8d9a85d4 | 268 | git_sortedcache_wunlock(backend->refcache); |
d00d5464 | 269 | |
fe372740 | 270 | done: |
ac3d33df | 271 | git_buf_dispose(&ref_file); |
fe372740 | 272 | return error; |
d00d5464 ET |
273 | } |
274 | ||
25e0b157 | 275 | static int _dirent_loose_load(void *payload, git_buf *full_path) |
d00d5464 | 276 | { |
25e0b157 | 277 | refdb_fs_backend *backend = payload; |
d00d5464 | 278 | const char *file_path; |
d00d5464 | 279 | |
fe372740 RB |
280 | if (git__suffixcmp(full_path->ptr, ".lock") == 0) |
281 | return 0; | |
282 | ||
a213a7bf CMN |
283 | if (git_path_isdir(full_path->ptr)) { |
284 | int error = git_path_direach( | |
25e0b157 | 285 | full_path, backend->direach_flags, _dirent_loose_load, backend); |
a213a7bf CMN |
286 | /* Race with the filesystem, ignore it */ |
287 | if (error == GIT_ENOTFOUND) { | |
ac3d33df | 288 | git_error_clear(); |
a213a7bf CMN |
289 | return 0; |
290 | } | |
291 | ||
292 | return error; | |
293 | } | |
d00d5464 | 294 | |
71dd0861 | 295 | file_path = full_path->ptr + strlen(backend->gitpath); |
d00d5464 | 296 | |
25e0b157 | 297 | return loose_lookup_to_packfile(backend, file_path); |
d00d5464 ET |
298 | } |
299 | ||
300 | /* | |
301 | * Load all the loose references from the repository | |
302 | * into the in-memory Packfile, and build a vector with | |
303 | * all the references so it can be written back to | |
304 | * disk. | |
305 | */ | |
306 | static int packed_loadloose(refdb_fs_backend *backend) | |
307 | { | |
fe372740 | 308 | int error; |
d00d5464 | 309 | git_buf refs_path = GIT_BUF_INIT; |
d00d5464 | 310 | |
71dd0861 | 311 | if (git_buf_joinpath(&refs_path, backend->gitpath, GIT_REFS_DIR) < 0) |
d00d5464 ET |
312 | return -1; |
313 | ||
314 | /* | |
315 | * Load all the loose files from disk into the Packfile table. | |
316 | * This will overwrite any old packed entries with their | |
317 | * updated loose versions | |
318 | */ | |
219d3457 | 319 | error = git_path_direach( |
25e0b157 | 320 | &refs_path, backend->direach_flags, _dirent_loose_load, backend); |
fe372740 | 321 | |
ac3d33df | 322 | git_buf_dispose(&refs_path); |
d00d5464 | 323 | |
96869a4e | 324 | return error; |
d00d5464 ET |
325 | } |
326 | ||
327 | static int refdb_fs_backend__exists( | |
328 | int *exists, | |
329 | git_refdb_backend *_backend, | |
330 | const char *ref_name) | |
331 | { | |
0c9c969a | 332 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
d00d5464 | 333 | git_buf ref_path = GIT_BUF_INIT; |
ce5553d4 | 334 | int error; |
d00d5464 | 335 | |
fe372740 | 336 | assert(backend); |
d00d5464 | 337 | |
0c9c969a UG |
338 | *exists = 0; |
339 | ||
340 | if ((error = git_buf_joinpath(&ref_path, backend->gitpath, ref_name)) < 0) | |
341 | goto out; | |
342 | ||
343 | if (git_path_isfile(ref_path.ptr)) { | |
344 | *exists = 1; | |
345 | goto out; | |
346 | } | |
347 | ||
348 | if ((error = packed_reload(backend)) < 0) | |
349 | goto out; | |
d00d5464 | 350 | |
0c9c969a UG |
351 | if (git_sortedcache_lookup(backend->refcache, ref_name) != NULL) { |
352 | *exists = 1; | |
353 | goto out; | |
354 | } | |
d00d5464 | 355 | |
0c9c969a | 356 | out: |
ac3d33df | 357 | git_buf_dispose(&ref_path); |
0c9c969a | 358 | return error; |
d00d5464 ET |
359 | } |
360 | ||
361 | static const char *loose_parse_symbolic(git_buf *file_content) | |
362 | { | |
363 | const unsigned int header_len = (unsigned int)strlen(GIT_SYMREF); | |
364 | const char *refname_start; | |
365 | ||
366 | refname_start = (const char *)file_content->ptr; | |
367 | ||
368 | if (git_buf_len(file_content) < header_len + 1) { | |
ac3d33df | 369 | git_error_set(GIT_ERROR_REFERENCE, "corrupted loose reference file"); |
d00d5464 ET |
370 | return NULL; |
371 | } | |
372 | ||
373 | /* | |
374 | * Assume we have already checked for the header | |
375 | * before calling this function | |
376 | */ | |
377 | refname_start += header_len; | |
378 | ||
379 | return refname_start; | |
380 | } | |
381 | ||
6da6b425 PS |
382 | /* |
383 | * Returns whether a reference is stored per worktree or not. | |
384 | * Per-worktree references are: | |
385 | * | |
386 | * - all pseudorefs, e.g. HEAD and MERGE_HEAD | |
387 | * - all references stored inside of "refs/bisect/" | |
388 | */ | |
e0a6c28e PS |
389 | static bool is_per_worktree_ref(const char *ref_name) |
390 | { | |
6da6b425 PS |
391 | return git__prefixcmp(ref_name, "refs/") != 0 || |
392 | git__prefixcmp(ref_name, "refs/bisect/") == 0; | |
e0a6c28e PS |
393 | } |
394 | ||
d00d5464 ET |
395 | static int loose_lookup( |
396 | git_reference **out, | |
397 | refdb_fs_backend *backend, | |
398 | const char *ref_name) | |
399 | { | |
d00d5464 ET |
400 | git_buf ref_file = GIT_BUF_INIT; |
401 | int error = 0; | |
e0a6c28e | 402 | const char *ref_dir; |
d00d5464 | 403 | |
b7107131 RB |
404 | if (out) |
405 | *out = NULL; | |
406 | ||
e0a6c28e PS |
407 | if (is_per_worktree_ref(ref_name)) |
408 | ref_dir = backend->gitpath; | |
409 | else | |
410 | ref_dir = backend->commonpath; | |
411 | ||
412 | if ((error = loose_readbuffer(&ref_file, ref_dir, ref_name)) < 0) | |
fe372740 RB |
413 | /* cannot read loose ref file - gah */; |
414 | else if (git__prefixcmp(git_buf_cstr(&ref_file), GIT_SYMREF) == 0) { | |
415 | const char *target; | |
d00d5464 | 416 | |
d00d5464 ET |
417 | git_buf_rtrim(&ref_file); |
418 | ||
fe372740 | 419 | if (!(target = loose_parse_symbolic(&ref_file))) |
d00d5464 | 420 | error = -1; |
fe372740 | 421 | else if (out != NULL) |
b7107131 | 422 | *out = git_reference__alloc_symbolic(ref_name, target); |
d00d5464 | 423 | } else { |
fe372740 | 424 | git_oid oid; |
4dcd8780 | 425 | |
fe372740 RB |
426 | if (!(error = loose_parse_oid(&oid, ref_name, &ref_file)) && |
427 | out != NULL) | |
b7107131 | 428 | *out = git_reference__alloc(ref_name, &oid, NULL); |
d00d5464 ET |
429 | } |
430 | ||
ac3d33df | 431 | git_buf_dispose(&ref_file); |
d00d5464 ET |
432 | return error; |
433 | } | |
434 | ||
fe372740 | 435 | static int ref_error_notfound(const char *name) |
d00d5464 | 436 | { |
ac3d33df | 437 | git_error_set(GIT_ERROR_REFERENCE, "reference '%s' not found", name); |
fe372740 | 438 | return GIT_ENOTFOUND; |
d00d5464 ET |
439 | } |
440 | ||
441 | static int packed_lookup( | |
442 | git_reference **out, | |
443 | refdb_fs_backend *backend, | |
444 | const char *ref_name) | |
445 | { | |
d00d5464 | 446 | int error = 0; |
fe372740 | 447 | struct packref *entry; |
4dcd8780 | 448 | |
ce5553d4 CMN |
449 | if ((error = packed_reload(backend)) < 0) |
450 | return error; | |
4dcd8780 | 451 | |
8d9a85d4 RB |
452 | if (git_sortedcache_rlock(backend->refcache) < 0) |
453 | return -1; | |
fe372740 RB |
454 | |
455 | entry = git_sortedcache_lookup(backend->refcache, ref_name); | |
456 | if (!entry) { | |
457 | error = ref_error_notfound(ref_name); | |
458 | } else { | |
459 | *out = git_reference__alloc(ref_name, &entry->oid, &entry->peel); | |
460 | if (!*out) | |
461 | error = -1; | |
462 | } | |
463 | ||
8d9a85d4 RB |
464 | git_sortedcache_runlock(backend->refcache); |
465 | ||
fe372740 | 466 | return error; |
d00d5464 ET |
467 | } |
468 | ||
469 | static int refdb_fs_backend__lookup( | |
470 | git_reference **out, | |
471 | git_refdb_backend *_backend, | |
472 | const char *ref_name) | |
473 | { | |
0c9c969a | 474 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
fe372740 | 475 | int error; |
d00d5464 | 476 | |
fe372740 | 477 | assert(backend); |
d00d5464 | 478 | |
fe372740 | 479 | if (!(error = loose_lookup(out, backend, ref_name))) |
d00d5464 ET |
480 | return 0; |
481 | ||
482 | /* only try to lookup this reference on the packfile if it | |
483 | * wasn't found on the loose refs; not if there was a critical error */ | |
fe372740 | 484 | if (error == GIT_ENOTFOUND) { |
ac3d33df | 485 | git_error_clear(); |
fe372740 | 486 | error = packed_lookup(out, backend, ref_name); |
d00d5464 ET |
487 | } |
488 | ||
fe372740 | 489 | return error; |
d00d5464 ET |
490 | } |
491 | ||
4def7035 CMN |
492 | typedef struct { |
493 | git_reference_iterator parent; | |
2638a03a | 494 | |
ec24e542 | 495 | char *glob; |
c77342ef RB |
496 | |
497 | git_pool pool; | |
2638a03a | 498 | git_vector loose; |
c77342ef | 499 | |
2d945f82 | 500 | git_sortedcache *cache; |
fe372740 RB |
501 | size_t loose_pos; |
502 | size_t packed_pos; | |
4def7035 CMN |
503 | } refdb_fs_iter; |
504 | ||
4def7035 | 505 | static void refdb_fs_backend__iterator_free(git_reference_iterator *_iter) |
d00d5464 | 506 | { |
0c9c969a | 507 | refdb_fs_iter *iter = GIT_CONTAINER_OF(_iter, refdb_fs_iter, parent); |
2638a03a VM |
508 | |
509 | git_vector_free(&iter->loose); | |
c77342ef | 510 | git_pool_clear(&iter->pool); |
2d945f82 | 511 | git_sortedcache_free(iter->cache); |
4def7035 CMN |
512 | git__free(iter); |
513 | } | |
d00d5464 | 514 | |
ec24e542 | 515 | static int iter_load_loose_paths(refdb_fs_backend *backend, refdb_fs_iter *iter) |
4def7035 | 516 | { |
219d3457 | 517 | int error = 0; |
2638a03a | 518 | git_buf path = GIT_BUF_INIT; |
c77342ef | 519 | git_iterator *fsit = NULL; |
ed1c6446 | 520 | git_iterator_options fsit_opts = GIT_ITERATOR_OPTIONS_INIT; |
2638a03a | 521 | const git_index_entry *entry = NULL; |
ac3d33df JK |
522 | const char *ref_prefix = GIT_REFS_DIR; |
523 | size_t ref_prefix_len = strlen(ref_prefix); | |
d00d5464 | 524 | |
e0a6c28e | 525 | if (!backend->commonpath) /* do nothing if no commonpath for loose refs */ |
cee695ae RB |
526 | return 0; |
527 | ||
ed1c6446 ET |
528 | fsit_opts.flags = backend->iterator_flags; |
529 | ||
ac3d33df JK |
530 | if (iter->glob) { |
531 | const char *last_sep = NULL; | |
532 | const char *pos; | |
533 | for (pos = iter->glob; *pos; ++pos) { | |
534 | switch (*pos) { | |
535 | case '?': | |
536 | case '*': | |
537 | case '[': | |
538 | case '\\': | |
539 | break; | |
540 | case '/': | |
541 | last_sep = pos; | |
542 | /* FALLTHROUGH */ | |
543 | default: | |
544 | continue; | |
545 | } | |
546 | break; | |
547 | } | |
548 | if (last_sep) { | |
549 | ref_prefix = iter->glob; | |
550 | ref_prefix_len = (last_sep - ref_prefix) + 1; | |
551 | } | |
552 | } | |
553 | ||
554 | if ((error = git_buf_printf(&path, "%s/", backend->commonpath)) < 0 || | |
555 | (error = git_buf_put(&path, ref_prefix, ref_prefix_len)) < 0) { | |
556 | git_buf_dispose(&path); | |
fe372740 RB |
557 | return error; |
558 | } | |
d00d5464 | 559 | |
ac3d33df JK |
560 | if ((error = git_iterator_for_filesystem(&fsit, path.ptr, &fsit_opts)) < 0) { |
561 | git_buf_dispose(&path); | |
562 | return (iter->glob && error == GIT_ENOTFOUND)? 0 : error; | |
563 | } | |
564 | ||
565 | error = git_buf_sets(&path, ref_prefix); | |
d00d5464 | 566 | |
fe372740 | 567 | while (!error && !git_iterator_advance(&entry, fsit)) { |
2638a03a | 568 | const char *ref_name; |
c77342ef | 569 | char *ref_dup; |
d00d5464 | 570 | |
ac3d33df | 571 | git_buf_truncate(&path, ref_prefix_len); |
2638a03a VM |
572 | git_buf_puts(&path, entry->path); |
573 | ref_name = git_buf_cstr(&path); | |
4dcd8780 | 574 | |
ec24e542 | 575 | if (git__suffixcmp(ref_name, ".lock") == 0 || |
0c9c969a | 576 | (iter->glob && wildmatch(iter->glob, ref_name, 0) != 0)) |
2638a03a | 577 | continue; |
d00d5464 | 578 | |
fe372740 RB |
579 | ref_dup = git_pool_strdup(&iter->pool, ref_name); |
580 | if (!ref_dup) | |
c77342ef | 581 | error = -1; |
fe372740 RB |
582 | else |
583 | error = git_vector_insert(&iter->loose, ref_dup); | |
2638a03a | 584 | } |
d00d5464 | 585 | |
2638a03a | 586 | git_iterator_free(fsit); |
ac3d33df | 587 | git_buf_dispose(&path); |
4def7035 | 588 | |
fe372740 | 589 | return error; |
4def7035 CMN |
590 | } |
591 | ||
ec24e542 VM |
592 | static int refdb_fs_backend__iterator_next( |
593 | git_reference **out, git_reference_iterator *_iter) | |
4def7035 | 594 | { |
8d9a85d4 | 595 | int error = GIT_ITEROVER; |
0c9c969a UG |
596 | refdb_fs_iter *iter = GIT_CONTAINER_OF(_iter, refdb_fs_iter, parent); |
597 | refdb_fs_backend *backend = GIT_CONTAINER_OF(iter->parent.db->backend, refdb_fs_backend, parent); | |
fe372740 | 598 | struct packref *ref; |
4def7035 | 599 | |
56960b83 | 600 | while (iter->loose_pos < iter->loose.length) { |
2638a03a | 601 | const char *path = git_vector_get(&iter->loose, iter->loose_pos++); |
56960b83 | 602 | |
0c9c969a UG |
603 | if (loose_lookup(out, backend, path) == 0) { |
604 | ref = git_sortedcache_lookup(iter->cache, path); | |
605 | if (ref) | |
606 | ref->flags |= PACKREF_SHADOWED; | |
607 | ||
56960b83 | 608 | return 0; |
0c9c969a | 609 | } |
56960b83 | 610 | |
ac3d33df | 611 | git_error_clear(); |
2638a03a | 612 | } |
d00d5464 | 613 | |
2d945f82 CMN |
614 | error = GIT_ITEROVER; |
615 | while (iter->packed_pos < git_sortedcache_entrycount(iter->cache)) { | |
616 | ref = git_sortedcache_entry(iter->cache, iter->packed_pos++); | |
fe372740 RB |
617 | if (!ref) /* stop now if another thread deleted refs and we past end */ |
618 | break; | |
ec24e542 VM |
619 | |
620 | if (ref->flags & PACKREF_SHADOWED) | |
621 | continue; | |
0c9c969a | 622 | if (iter->glob && wildmatch(iter->glob, ref->name, 0) != 0) |
ec24e542 | 623 | continue; |
99d32707 | 624 | |
56960b83 | 625 | *out = git_reference__alloc(ref->name, &ref->oid, &ref->peel); |
8d9a85d4 RB |
626 | error = (*out != NULL) ? 0 : -1; |
627 | break; | |
4def7035 CMN |
628 | } |
629 | ||
8d9a85d4 | 630 | return error; |
d00d5464 ET |
631 | } |
632 | ||
ec24e542 VM |
633 | static int refdb_fs_backend__iterator_next_name( |
634 | const char **out, git_reference_iterator *_iter) | |
635 | { | |
8d9a85d4 | 636 | int error = GIT_ITEROVER; |
0c9c969a UG |
637 | refdb_fs_iter *iter = GIT_CONTAINER_OF(_iter, refdb_fs_iter, parent); |
638 | refdb_fs_backend *backend = GIT_CONTAINER_OF(iter->parent.db->backend, refdb_fs_backend, parent); | |
8d9a85d4 | 639 | struct packref *ref; |
ec24e542 VM |
640 | |
641 | while (iter->loose_pos < iter->loose.length) { | |
642 | const char *path = git_vector_get(&iter->loose, iter->loose_pos++); | |
0c9c969a | 643 | struct packref *ref; |
ec24e542 | 644 | |
8d9a85d4 | 645 | if (loose_lookup(NULL, backend, path) == 0) { |
0c9c969a UG |
646 | ref = git_sortedcache_lookup(iter->cache, path); |
647 | if (ref) | |
648 | ref->flags |= PACKREF_SHADOWED; | |
649 | ||
8d9a85d4 RB |
650 | *out = path; |
651 | return 0; | |
b7107131 RB |
652 | } |
653 | ||
ac3d33df | 654 | git_error_clear(); |
ec24e542 VM |
655 | } |
656 | ||
2d945f82 CMN |
657 | error = GIT_ITEROVER; |
658 | while (iter->packed_pos < git_sortedcache_entrycount(iter->cache)) { | |
659 | ref = git_sortedcache_entry(iter->cache, iter->packed_pos++); | |
8d9a85d4 RB |
660 | if (!ref) /* stop now if another thread deleted refs and we past end */ |
661 | break; | |
fe372740 RB |
662 | |
663 | if (ref->flags & PACKREF_SHADOWED) | |
664 | continue; | |
0c9c969a | 665 | if (iter->glob && wildmatch(iter->glob, ref->name, 0) != 0) |
ec24e542 VM |
666 | continue; |
667 | ||
8d9a85d4 RB |
668 | *out = ref->name; |
669 | error = 0; | |
670 | break; | |
ec24e542 VM |
671 | } |
672 | ||
8d9a85d4 | 673 | return error; |
ec24e542 VM |
674 | } |
675 | ||
676 | static int refdb_fs_backend__iterator( | |
677 | git_reference_iterator **out, git_refdb_backend *_backend, const char *glob) | |
678 | { | |
0c9c969a UG |
679 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
680 | refdb_fs_iter *iter = NULL; | |
ce5553d4 | 681 | int error; |
ec24e542 | 682 | |
fe372740 | 683 | assert(backend); |
ec24e542 | 684 | |
ec24e542 | 685 | iter = git__calloc(1, sizeof(refdb_fs_iter)); |
ac3d33df | 686 | GIT_ERROR_CHECK_ALLOC(iter); |
ec24e542 | 687 | |
1e5e02b4 VM |
688 | git_pool_init(&iter->pool, 1); |
689 | ||
0c9c969a UG |
690 | if ((error = git_vector_init(&iter->loose, 8, NULL)) < 0) |
691 | goto out; | |
c77342ef RB |
692 | |
693 | if (glob != NULL && | |
0c9c969a UG |
694 | (iter->glob = git_pool_strdup(&iter->pool, glob)) == NULL) { |
695 | error = GIT_ERROR_NOMEMORY; | |
696 | goto out; | |
697 | } | |
698 | ||
699 | if ((error = iter_load_loose_paths(backend, iter)) < 0) | |
700 | goto out; | |
701 | ||
702 | if ((error = packed_reload(backend)) < 0) | |
703 | goto out; | |
704 | ||
705 | if ((error = git_sortedcache_copy(&iter->cache, backend->refcache, 1, NULL, NULL)) < 0) | |
706 | goto out; | |
ec24e542 VM |
707 | |
708 | iter->parent.next = refdb_fs_backend__iterator_next; | |
709 | iter->parent.next_name = refdb_fs_backend__iterator_next_name; | |
710 | iter->parent.free = refdb_fs_backend__iterator_free; | |
711 | ||
ec24e542 | 712 | *out = (git_reference_iterator *)iter; |
0c9c969a UG |
713 | out: |
714 | if (error) | |
715 | refdb_fs_backend__iterator_free((git_reference_iterator *)iter); | |
716 | return error; | |
ec24e542 VM |
717 | } |
718 | ||
4e6e2ff2 VM |
719 | static bool ref_is_available( |
720 | const char *old_ref, const char *new_ref, const char *this_ref) | |
721 | { | |
722 | if (old_ref == NULL || strcmp(old_ref, this_ref)) { | |
723 | size_t reflen = strlen(this_ref); | |
724 | size_t newlen = strlen(new_ref); | |
725 | size_t cmplen = reflen < newlen ? reflen : newlen; | |
726 | const char *lead = reflen < newlen ? new_ref : this_ref; | |
727 | ||
728 | if (!strncmp(new_ref, this_ref, cmplen) && lead[cmplen] == '/') { | |
729 | return false; | |
730 | } | |
731 | } | |
732 | ||
733 | return true; | |
734 | } | |
735 | ||
736 | static int reference_path_available( | |
737 | refdb_fs_backend *backend, | |
738 | const char *new_ref, | |
739 | const char* old_ref, | |
740 | int force) | |
741 | { | |
fe372740 | 742 | size_t i; |
ce5553d4 | 743 | int error; |
4e6e2ff2 | 744 | |
ce5553d4 CMN |
745 | if ((error = packed_reload(backend)) < 0) |
746 | return error; | |
4e6e2ff2 VM |
747 | |
748 | if (!force) { | |
749 | int exists; | |
750 | ||
ce5553d4 CMN |
751 | if ((error = refdb_fs_backend__exists( |
752 | &exists, (git_refdb_backend *)backend, new_ref)) < 0) { | |
753 | return error; | |
754 | } | |
4e6e2ff2 VM |
755 | |
756 | if (exists) { | |
ac3d33df | 757 | git_error_set(GIT_ERROR_REFERENCE, |
909d5494 | 758 | "failed to write reference '%s': a reference with " |
8d9a85d4 | 759 | "that name already exists.", new_ref); |
4e6e2ff2 VM |
760 | return GIT_EEXISTS; |
761 | } | |
762 | } | |
763 | ||
8d9a85d4 | 764 | git_sortedcache_rlock(backend->refcache); |
fe372740 RB |
765 | |
766 | for (i = 0; i < git_sortedcache_entrycount(backend->refcache); ++i) { | |
8d9a85d4 | 767 | struct packref *ref = git_sortedcache_entry(backend->refcache, i); |
fe372740 | 768 | |
8d9a85d4 RB |
769 | if (ref && !ref_is_available(old_ref, new_ref, ref->name)) { |
770 | git_sortedcache_runlock(backend->refcache); | |
ac3d33df | 771 | git_error_set(GIT_ERROR_REFERENCE, |
909d5494 | 772 | "path to reference '%s' collides with existing one", new_ref); |
4e6e2ff2 VM |
773 | return -1; |
774 | } | |
fe372740 | 775 | } |
c77342ef | 776 | |
8d9a85d4 | 777 | git_sortedcache_runlock(backend->refcache); |
4e6e2ff2 VM |
778 | return 0; |
779 | } | |
ec24e542 | 780 | |
7ee8c7e6 | 781 | static int loose_lock(git_filebuf *file, refdb_fs_backend *backend, const char *name) |
d00d5464 | 782 | { |
af3dcb0e | 783 | int error, filebuf_flags; |
d00d5464 | 784 | git_buf ref_path = GIT_BUF_INIT; |
097f0105 | 785 | const char *basedir; |
d00d5464 | 786 | |
7ee8c7e6 | 787 | assert(file && backend && name); |
9b148098 | 788 | |
4b3ec53c | 789 | if (!git_path_isvalid(backend->repo, name, 0, GIT_PATH_REJECT_FILESYSTEM_DEFAULTS)) { |
ac3d33df | 790 | git_error_set(GIT_ERROR_INVALID, "invalid reference name '%s'", name); |
a64119e3 ET |
791 | return GIT_EINVALIDSPEC; |
792 | } | |
793 | ||
097f0105 PS |
794 | if (is_per_worktree_ref(name)) |
795 | basedir = backend->gitpath; | |
796 | else | |
797 | basedir = backend->commonpath; | |
798 | ||
d00d5464 ET |
799 | /* Remove a possibly existing empty directory hierarchy |
800 | * which name would collide with the reference name | |
801 | */ | |
097f0105 | 802 | if ((error = git_futils_rmdir_r(name, basedir, GIT_RMDIR_SKIP_NONEMPTY)) < 0) |
6ab65b80 | 803 | return error; |
d00d5464 | 804 | |
097f0105 | 805 | if (git_buf_joinpath(&ref_path, basedir, name) < 0) |
d00d5464 ET |
806 | return -1; |
807 | ||
0c9c969a | 808 | filebuf_flags = GIT_FILEBUF_CREATE_LEADING_DIRS; |
1c04a96b | 809 | if (backend->fsync) |
af3dcb0e ET |
810 | filebuf_flags |= GIT_FILEBUF_FSYNC; |
811 | ||
812 | error = git_filebuf_open(file, ref_path.ptr, filebuf_flags, GIT_REFS_FILE_MODE); | |
d00d5464 | 813 | |
b46c7ee5 | 814 | if (error == GIT_EDIRECTORY) |
ac3d33df | 815 | git_error_set(GIT_ERROR_REFERENCE, "cannot lock ref '%s', there are refs beneath that folder", name); |
b46c7ee5 | 816 | |
ac3d33df | 817 | git_buf_dispose(&ref_path); |
b46c7ee5 | 818 | return error; |
a57dd3b7 | 819 | } |
d00d5464 | 820 | |
a57dd3b7 CMN |
821 | static int loose_commit(git_filebuf *file, const git_reference *ref) |
822 | { | |
9b148098 CMN |
823 | assert(file && ref); |
824 | ||
ac3d33df | 825 | if (ref->type == GIT_REFERENCE_DIRECT) { |
d00d5464 | 826 | char oid[GIT_OID_HEXSZ + 1]; |
fe372740 | 827 | git_oid_nfmt(oid, sizeof(oid), &ref->target.oid); |
d00d5464 | 828 | |
a57dd3b7 | 829 | git_filebuf_printf(file, "%s\n", oid); |
ac3d33df | 830 | } else if (ref->type == GIT_REFERENCE_SYMBOLIC) { |
a57dd3b7 | 831 | git_filebuf_printf(file, GIT_SYMREF "%s\n", ref->target.symbolic); |
d00d5464 ET |
832 | } else { |
833 | assert(0); /* don't let this happen */ | |
834 | } | |
835 | ||
a57dd3b7 | 836 | return git_filebuf_commit(file); |
d00d5464 ET |
837 | } |
838 | ||
ab8d9242 CMN |
839 | static int refdb_fs_backend__lock(void **out, git_refdb_backend *_backend, const char *refname) |
840 | { | |
841 | int error; | |
842 | git_filebuf *lock; | |
0c9c969a | 843 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
ab8d9242 CMN |
844 | |
845 | lock = git__calloc(1, sizeof(git_filebuf)); | |
ac3d33df | 846 | GIT_ERROR_CHECK_ALLOC(lock); |
ab8d9242 CMN |
847 | |
848 | if ((error = loose_lock(lock, backend, refname)) < 0) { | |
849 | git__free(lock); | |
850 | return error; | |
851 | } | |
852 | ||
853 | *out = lock; | |
854 | return 0; | |
855 | } | |
856 | ||
857 | static int refdb_fs_backend__write_tail( | |
858 | git_refdb_backend *_backend, | |
859 | const git_reference *ref, | |
860 | git_filebuf *file, | |
861 | int update_reflog, | |
ab8d9242 | 862 | const git_oid *old_id, |
0c9c969a UG |
863 | const char *old_target, |
864 | const git_signature *who, | |
865 | const char *message); | |
ab8d9242 CMN |
866 | |
867 | static int refdb_fs_backend__delete_tail( | |
868 | git_refdb_backend *_backend, | |
869 | git_filebuf *file, | |
870 | const char *ref_name, | |
0c9c969a UG |
871 | const git_oid *old_id, |
872 | const char *old_target); | |
ab8d9242 CMN |
873 | |
874 | static int refdb_fs_backend__unlock(git_refdb_backend *backend, void *payload, int success, int update_reflog, | |
875 | const git_reference *ref, const git_signature *sig, const char *message) | |
876 | { | |
877 | git_filebuf *lock = (git_filebuf *) payload; | |
878 | int error = 0; | |
879 | ||
880 | if (success == 2) | |
881 | error = refdb_fs_backend__delete_tail(backend, lock, ref->name, NULL, NULL); | |
882 | else if (success) | |
0c9c969a | 883 | error = refdb_fs_backend__write_tail(backend, ref, lock, update_reflog, NULL, NULL, sig, message); |
ab8d9242 CMN |
884 | else |
885 | git_filebuf_cleanup(lock); | |
886 | ||
887 | git__free(lock); | |
888 | return error; | |
889 | } | |
890 | ||
d00d5464 ET |
891 | /* |
892 | * Find out what object this reference resolves to. | |
893 | * | |
894 | * For references that point to a 'big' tag (e.g. an | |
895 | * actual tag object on the repository), we need to | |
896 | * cache on the packfile the OID of the object to | |
897 | * which that 'big tag' is pointing to. | |
898 | */ | |
899 | static int packed_find_peel(refdb_fs_backend *backend, struct packref *ref) | |
900 | { | |
901 | git_object *object; | |
902 | ||
f69db390 | 903 | if (ref->flags & PACKREF_HAS_PEEL || ref->flags & PACKREF_CANNOT_PEEL) |
d00d5464 ET |
904 | return 0; |
905 | ||
d00d5464 ET |
906 | /* |
907 | * Find the tagged object in the repository | |
908 | */ | |
ac3d33df | 909 | if (git_object_lookup(&object, backend->repo, &ref->oid, GIT_OBJECT_ANY) < 0) |
d00d5464 ET |
910 | return -1; |
911 | ||
912 | /* | |
913 | * If the tagged object is a Tag object, we need to resolve it; | |
914 | * if the ref is actually a 'weak' ref, we don't need to resolve | |
915 | * anything. | |
916 | */ | |
ac3d33df | 917 | if (git_object_type(object) == GIT_OBJECT_TAG) { |
d00d5464 ET |
918 | git_tag *tag = (git_tag *)object; |
919 | ||
920 | /* | |
921 | * Find the object pointed at by this tag | |
922 | */ | |
923 | git_oid_cpy(&ref->peel, git_tag_target_id(tag)); | |
f69db390 | 924 | ref->flags |= PACKREF_HAS_PEEL; |
d00d5464 ET |
925 | |
926 | /* | |
927 | * The reference has now cached the resolved OID, and is | |
928 | * marked at such. When written to the packfile, it'll be | |
929 | * accompanied by this resolved oid | |
930 | */ | |
931 | } | |
932 | ||
933 | git_object_free(object); | |
934 | return 0; | |
935 | } | |
936 | ||
937 | /* | |
938 | * Write a single reference into a packfile | |
939 | */ | |
940 | static int packed_write_ref(struct packref *ref, git_filebuf *file) | |
941 | { | |
942 | char oid[GIT_OID_HEXSZ + 1]; | |
fe372740 | 943 | git_oid_nfmt(oid, sizeof(oid), &ref->oid); |
d00d5464 ET |
944 | |
945 | /* | |
946 | * For references that peel to an object in the repo, we must | |
947 | * write the resulting peel on a separate line, e.g. | |
948 | * | |
949 | * 6fa8a902cc1d18527e1355773c86721945475d37 refs/tags/libgit2-0.4 | |
950 | * ^2ec0cb7959b0bf965d54f95453f5b4b34e8d3100 | |
951 | * | |
952 | * This obviously only applies to tags. | |
953 | * The required peels have already been loaded into `ref->peel_target`. | |
954 | */ | |
f69db390 | 955 | if (ref->flags & PACKREF_HAS_PEEL) { |
d00d5464 | 956 | char peel[GIT_OID_HEXSZ + 1]; |
fe372740 | 957 | git_oid_nfmt(peel, sizeof(peel), &ref->peel); |
d00d5464 ET |
958 | |
959 | if (git_filebuf_printf(file, "%s %s\n^%s\n", oid, ref->name, peel) < 0) | |
960 | return -1; | |
961 | } else { | |
962 | if (git_filebuf_printf(file, "%s %s\n", oid, ref->name) < 0) | |
963 | return -1; | |
964 | } | |
965 | ||
966 | return 0; | |
967 | } | |
968 | ||
969 | /* | |
970 | * Remove all loose references | |
971 | * | |
972 | * Once we have successfully written a packfile, | |
973 | * all the loose references that were packed must be | |
974 | * removed from disk. | |
975 | * | |
976 | * This is a dangerous method; make sure the packfile | |
977 | * is well-written, because we are destructing references | |
978 | * here otherwise. | |
979 | */ | |
fe372740 | 980 | static int packed_remove_loose(refdb_fs_backend *backend) |
d00d5464 | 981 | { |
10c06114 | 982 | size_t i; |
dd1ca6f1 | 983 | git_filebuf lock = GIT_FILEBUF_INIT; |
2d9aec99 | 984 | git_buf ref_content = GIT_BUF_INIT; |
7ea4710a | 985 | int error = 0; |
d00d5464 | 986 | |
fe372740 RB |
987 | /* backend->refcache is already locked when this is called */ |
988 | ||
989 | for (i = 0; i < git_sortedcache_entrycount(backend->refcache); ++i) { | |
990 | struct packref *ref = git_sortedcache_entry(backend->refcache, i); | |
2d9aec99 | 991 | git_oid current_id; |
d00d5464 | 992 | |
8d9a85d4 | 993 | if (!ref || !(ref->flags & PACKREF_WAS_LOOSE)) |
d00d5464 ET |
994 | continue; |
995 | ||
dd1ca6f1 CMN |
996 | git_filebuf_cleanup(&lock); |
997 | ||
2d9aec99 CMN |
998 | /* We need to stop anybody from updating the ref while we try to do a safe delete */ |
999 | error = loose_lock(&lock, backend, ref->name); | |
1000 | /* If someone else is updating it, let them do it */ | |
7ea4710a | 1001 | if (error == GIT_EEXISTS || error == GIT_ENOTFOUND) |
2d9aec99 CMN |
1002 | continue; |
1003 | ||
1004 | if (error < 0) { | |
ac3d33df JK |
1005 | git_buf_dispose(&ref_content); |
1006 | git_error_set(GIT_ERROR_REFERENCE, "failed to lock loose reference '%s'", ref->name); | |
7ea4710a | 1007 | return error; |
2d9aec99 CMN |
1008 | } |
1009 | ||
1010 | error = git_futils_readbuffer(&ref_content, lock.path_original); | |
1011 | /* Someone else beat us to cleaning up the ref, let's simply continue */ | |
dd1ca6f1 | 1012 | if (error == GIT_ENOTFOUND) |
2d9aec99 | 1013 | continue; |
2d9aec99 CMN |
1014 | |
1015 | /* This became a symref between us packing and trying to delete it, so ignore it */ | |
dd1ca6f1 | 1016 | if (!git__prefixcmp(ref_content.ptr, GIT_SYMREF)) |
2d9aec99 | 1017 | continue; |
2d9aec99 | 1018 | |
dd1ca6f1 CMN |
1019 | /* Figure out the current id; if we find a bad ref file, skip it so we can do the rest */ |
1020 | if (loose_parse_oid(¤t_id, lock.path_original, &ref_content) < 0) | |
2d9aec99 | 1021 | continue; |
d00d5464 | 1022 | |
2d9aec99 | 1023 | /* If the ref moved since we packed it, we must not delete it */ |
dd1ca6f1 | 1024 | if (!git_oid_equal(¤t_id, &ref->oid)) |
2d9aec99 | 1025 | continue; |
2d9aec99 | 1026 | |
d00d5464 ET |
1027 | /* |
1028 | * if we fail to remove a single file, this is *not* good, | |
1029 | * but we should keep going and remove as many as possible. | |
7ea4710a CMN |
1030 | * If we fail to remove, the ref is still in the old state, so |
1031 | * we haven't lost information. | |
d00d5464 | 1032 | */ |
7ea4710a | 1033 | p_unlink(lock.path_original); |
d00d5464 ET |
1034 | } |
1035 | ||
ac3d33df | 1036 | git_buf_dispose(&ref_content); |
dd1ca6f1 | 1037 | git_filebuf_cleanup(&lock); |
7ea4710a | 1038 | return 0; |
d00d5464 ET |
1039 | } |
1040 | ||
1041 | /* | |
1042 | * Write all the contents in the in-memory packfile to disk. | |
1043 | */ | |
1044 | static int packed_write(refdb_fs_backend *backend) | |
1045 | { | |
8d9a85d4 | 1046 | git_sortedcache *refcache = backend->refcache; |
d00d5464 | 1047 | git_filebuf pack_file = GIT_FILEBUF_INIT; |
eb56ed81 | 1048 | int error, open_flags = 0; |
10c06114 | 1049 | size_t i; |
d00d5464 | 1050 | |
fe372740 | 1051 | /* lock the cache to updates while we do this */ |
9914efec CMN |
1052 | if ((error = git_sortedcache_wlock(refcache)) < 0) |
1053 | return error; | |
d00d5464 | 1054 | |
1c04a96b | 1055 | if (backend->fsync) |
eb56ed81 ET |
1056 | open_flags = GIT_FILEBUF_FSYNC; |
1057 | ||
fe372740 | 1058 | /* Open the file! */ |
eb56ed81 | 1059 | if ((error = git_filebuf_open(&pack_file, git_sortedcache_path(refcache), open_flags, GIT_PACKEDREFS_FILE_MODE)) < 0) |
8d9a85d4 | 1060 | goto fail; |
d00d5464 ET |
1061 | |
1062 | /* Packfiles have a header... apparently | |
1063 | * This is in fact not required, but we might as well print it | |
1064 | * just for kicks */ | |
9914efec | 1065 | if ((error = git_filebuf_printf(&pack_file, "%s\n", GIT_PACKEDREFS_HEADER)) < 0) |
8d9a85d4 | 1066 | goto fail; |
d00d5464 | 1067 | |
8d9a85d4 RB |
1068 | for (i = 0; i < git_sortedcache_entrycount(refcache); ++i) { |
1069 | struct packref *ref = git_sortedcache_entry(refcache, i); | |
b27ccad2 | 1070 | assert(ref); |
d00d5464 | 1071 | |
9914efec | 1072 | if ((error = packed_find_peel(backend, ref)) < 0) |
8d9a85d4 | 1073 | goto fail; |
d00d5464 | 1074 | |
9914efec | 1075 | if ((error = packed_write_ref(ref, &pack_file)) < 0) |
8d9a85d4 | 1076 | goto fail; |
d00d5464 ET |
1077 | } |
1078 | ||
1079 | /* if we've written all the references properly, we can commit | |
1080 | * the packfile to make the changes effective */ | |
9914efec | 1081 | if ((error = git_filebuf_commit(&pack_file)) < 0) |
8d9a85d4 | 1082 | goto fail; |
d00d5464 ET |
1083 | |
1084 | /* when and only when the packfile has been properly written, | |
1085 | * we can go ahead and remove the loose refs */ | |
9914efec | 1086 | if ((error = packed_remove_loose(backend)) < 0) |
8d9a85d4 | 1087 | goto fail; |
d00d5464 | 1088 | |
8d9a85d4 RB |
1089 | git_sortedcache_updated(refcache); |
1090 | git_sortedcache_wunlock(refcache); | |
d00d5464 ET |
1091 | |
1092 | /* we're good now */ | |
1093 | return 0; | |
1094 | ||
8d9a85d4 | 1095 | fail: |
d00d5464 | 1096 | git_filebuf_cleanup(&pack_file); |
8d9a85d4 | 1097 | git_sortedcache_wunlock(refcache); |
d00d5464 | 1098 | |
9914efec | 1099 | return error; |
d00d5464 ET |
1100 | } |
1101 | ||
0c9c969a UG |
1102 | static int packed_delete(refdb_fs_backend *backend, const char *ref_name) |
1103 | { | |
1104 | size_t pack_pos; | |
1105 | int error, found = 0; | |
1106 | ||
1107 | if ((error = packed_reload(backend)) < 0) | |
1108 | goto cleanup; | |
1109 | ||
1110 | if ((error = git_sortedcache_wlock(backend->refcache)) < 0) | |
1111 | goto cleanup; | |
1112 | ||
1113 | /* If a packed reference exists, remove it from the packfile and repack if necessary */ | |
1114 | error = git_sortedcache_lookup_index(&pack_pos, backend->refcache, ref_name); | |
1115 | if (error == 0) { | |
1116 | error = git_sortedcache_remove(backend->refcache, pack_pos); | |
1117 | found = 1; | |
1118 | } | |
1119 | if (error == GIT_ENOTFOUND) | |
1120 | error = 0; | |
1121 | ||
1122 | git_sortedcache_wunlock(backend->refcache); | |
1123 | ||
1124 | if (found) | |
1125 | error = packed_write(backend); | |
1126 | ||
1127 | cleanup: | |
1128 | return error; | |
1129 | } | |
1130 | ||
4b7e1b9e | 1131 | 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); |
6f13a305 CMN |
1132 | static int has_reflog(git_repository *repo, const char *name); |
1133 | ||
83504371 | 1134 | static int should_write_reflog(int *write, git_repository *repo, const char *name) |
6f13a305 | 1135 | { |
2b52a0bf | 1136 | int error, logall; |
6f13a305 | 1137 | |
0c9c969a | 1138 | error = git_repository__configmap_lookup(&logall, repo, GIT_CONFIGMAP_LOGALLREFUPDATES); |
2b52a0bf | 1139 | if (error < 0) |
83504371 CMN |
1140 | return error; |
1141 | ||
2b52a0bf RB |
1142 | /* Defaults to the opposite of the repo being bare */ |
1143 | if (logall == GIT_LOGALLREFUPDATES_UNSET) | |
1144 | logall = !git_repository_is_bare(repo); | |
83504371 | 1145 | |
ac3d33df JK |
1146 | *write = 0; |
1147 | switch (logall) { | |
1148 | case GIT_LOGALLREFUPDATES_FALSE: | |
83504371 | 1149 | *write = 0; |
ac3d33df JK |
1150 | break; |
1151 | ||
1152 | case GIT_LOGALLREFUPDATES_TRUE: | |
1153 | /* Only write if it already has a log, | |
1154 | * or if it's under heads/, remotes/ or notes/ | |
1155 | */ | |
1156 | *write = has_reflog(repo, name) || | |
1157 | !git__prefixcmp(name, GIT_REFS_HEADS_DIR) || | |
1158 | !git__strcmp(name, GIT_HEAD_FILE) || | |
1159 | !git__prefixcmp(name, GIT_REFS_REMOTES_DIR) || | |
1160 | !git__prefixcmp(name, GIT_REFS_NOTES_DIR); | |
1161 | break; | |
1162 | ||
1163 | case GIT_LOGALLREFUPDATES_ALWAYS: | |
83504371 | 1164 | *write = 1; |
ac3d33df | 1165 | break; |
83504371 | 1166 | } |
6f13a305 CMN |
1167 | |
1168 | return 0; | |
1169 | } | |
a57dd3b7 | 1170 | |
7ee8c7e6 | 1171 | static int cmp_old_ref(int *cmp, git_refdb_backend *backend, const char *name, |
f8621dde CMN |
1172 | const git_oid *old_id, const char *old_target) |
1173 | { | |
1174 | int error = 0; | |
1175 | git_reference *old_ref = NULL; | |
1176 | ||
1177 | *cmp = 0; | |
b7ae71ec CMN |
1178 | /* It "matches" if there is no old value to compare against */ |
1179 | if (!old_id && !old_target) | |
1180 | return 0; | |
1181 | ||
1182 | if ((error = refdb_fs_backend__lookup(&old_ref, backend, name)) < 0) | |
1183 | goto out; | |
1184 | ||
1185 | /* If the types don't match, there's no way the values do */ | |
ac3d33df | 1186 | if (old_id && old_ref->type != GIT_REFERENCE_DIRECT) { |
b7ae71ec CMN |
1187 | *cmp = -1; |
1188 | goto out; | |
1189 | } | |
ac3d33df | 1190 | if (old_target && old_ref->type != GIT_REFERENCE_SYMBOLIC) { |
b7ae71ec CMN |
1191 | *cmp = 1; |
1192 | goto out; | |
f8621dde CMN |
1193 | } |
1194 | ||
ac3d33df | 1195 | if (old_id && old_ref->type == GIT_REFERENCE_DIRECT) |
f8621dde CMN |
1196 | *cmp = git_oid_cmp(old_id, &old_ref->target.oid); |
1197 | ||
ac3d33df | 1198 | if (old_target && old_ref->type == GIT_REFERENCE_SYMBOLIC) |
f8621dde CMN |
1199 | *cmp = git__strcmp(old_target, old_ref->target.symbolic); |
1200 | ||
1201 | out: | |
1202 | git_reference_free(old_ref); | |
1203 | ||
1204 | return error; | |
1205 | } | |
1206 | ||
4b7e1b9e CMN |
1207 | /* |
1208 | * The git.git comment regarding this, for your viewing pleasure: | |
1209 | * | |
1210 | * Special hack: If a branch is updated directly and HEAD | |
1211 | * points to it (may happen on the remote side of a push | |
1212 | * for example) then logically the HEAD reflog should be | |
1213 | * updated too. | |
1214 | * A generic solution implies reverse symref information, | |
1215 | * but finding all symrefs pointing to the given branch | |
1216 | * would be rather costly for this rare event (the direct | |
1217 | * update of a branch) to be worth it. So let's cheat and | |
1218 | * check with HEAD only which should cover 99% of all usage | |
1219 | * scenarios (even 100% of the default ones). | |
1220 | */ | |
1221 | static int maybe_append_head(refdb_fs_backend *backend, const git_reference *ref, const git_signature *who, const char *message) | |
1222 | { | |
1223 | int error; | |
90388aa8 | 1224 | git_oid old_id; |
99797c96 CMN |
1225 | git_reference *tmp = NULL, *head = NULL, *peeled = NULL; |
1226 | const char *name; | |
1227 | ||
ac3d33df | 1228 | if (ref->type == GIT_REFERENCE_SYMBOLIC) |
99797c96 | 1229 | return 0; |
4b7e1b9e | 1230 | |
6aaae94a | 1231 | /* if we can't resolve, we use {0}*40 as old id */ |
90388aa8 PS |
1232 | if (git_reference_name_to_id(&old_id, backend->repo, ref->name) < 0) |
1233 | memset(&old_id, 0, sizeof(old_id)); | |
4b7e1b9e | 1234 | |
99797c96 | 1235 | if ((error = git_reference_lookup(&head, backend->repo, GIT_HEAD_FILE)) < 0) |
4b7e1b9e CMN |
1236 | return error; |
1237 | ||
ac3d33df | 1238 | if (git_reference_type(head) == GIT_REFERENCE_DIRECT) |
6aaae94a CMN |
1239 | goto cleanup; |
1240 | ||
99797c96 CMN |
1241 | if ((error = git_reference_lookup(&tmp, backend->repo, GIT_HEAD_FILE)) < 0) |
1242 | goto cleanup; | |
1243 | ||
1244 | /* Go down the symref chain until we find the branch */ | |
ac3d33df | 1245 | while (git_reference_type(tmp) == GIT_REFERENCE_SYMBOLIC) { |
99797c96 CMN |
1246 | error = git_reference_lookup(&peeled, backend->repo, git_reference_symbolic_target(tmp)); |
1247 | if (error < 0) | |
1248 | break; | |
1249 | ||
1250 | git_reference_free(tmp); | |
1251 | tmp = peeled; | |
1252 | } | |
1253 | ||
1254 | if (error == GIT_ENOTFOUND) { | |
1255 | error = 0; | |
1256 | name = git_reference_symbolic_target(tmp); | |
1257 | } else if (error < 0) { | |
1258 | goto cleanup; | |
1259 | } else { | |
1260 | name = git_reference_name(tmp); | |
1261 | } | |
1262 | ||
99797c96 | 1263 | if (strcmp(name, ref->name)) |
6aaae94a CMN |
1264 | goto cleanup; |
1265 | ||
4b7e1b9e CMN |
1266 | error = reflog_append(backend, head, &old_id, git_reference_target(ref), who, message); |
1267 | ||
6aaae94a | 1268 | cleanup: |
99797c96 | 1269 | git_reference_free(tmp); |
4b7e1b9e CMN |
1270 | git_reference_free(head); |
1271 | return error; | |
1272 | } | |
1273 | ||
d00d5464 ET |
1274 | static int refdb_fs_backend__write( |
1275 | git_refdb_backend *_backend, | |
4e6e2ff2 | 1276 | const git_reference *ref, |
110df893 | 1277 | int force, |
a57dd3b7 | 1278 | const git_signature *who, |
9b148098 | 1279 | const char *message, |
91123661 CMN |
1280 | const git_oid *old_id, |
1281 | const char *old_target) | |
d00d5464 | 1282 | { |
0c9c969a | 1283 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
a57dd3b7 | 1284 | git_filebuf file = GIT_FILEBUF_INIT; |
ab8d9242 | 1285 | int error = 0; |
d00d5464 | 1286 | |
fe372740 | 1287 | assert(backend); |
d00d5464 | 1288 | |
ce5553d4 | 1289 | if ((error = reference_path_available(backend, ref->name, NULL, force)) < 0) |
4e6e2ff2 VM |
1290 | return error; |
1291 | ||
9b148098 | 1292 | /* We need to perform the reflog append and old value check under the ref's lock */ |
7ee8c7e6 | 1293 | if ((error = loose_lock(&file, backend, ref->name)) < 0) |
a57dd3b7 CMN |
1294 | return error; |
1295 | ||
0c9c969a | 1296 | return refdb_fs_backend__write_tail(_backend, ref, &file, true, old_id, old_target, who, message); |
ab8d9242 CMN |
1297 | } |
1298 | ||
1299 | static int refdb_fs_backend__write_tail( | |
1300 | git_refdb_backend *_backend, | |
1301 | const git_reference *ref, | |
1302 | git_filebuf *file, | |
1303 | int update_reflog, | |
ab8d9242 | 1304 | const git_oid *old_id, |
0c9c969a UG |
1305 | const char *old_target, |
1306 | const git_signature *who, | |
1307 | const char *message) | |
ab8d9242 | 1308 | { |
0c9c969a | 1309 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
ab8d9242 CMN |
1310 | int error = 0, cmp = 0, should_write; |
1311 | const char *new_target = NULL; | |
1312 | const git_oid *new_id = NULL; | |
1313 | ||
7ee8c7e6 | 1314 | if ((error = cmp_old_ref(&cmp, _backend, ref->name, old_id, old_target)) < 0) |
f8621dde | 1315 | goto on_error; |
91123661 CMN |
1316 | |
1317 | if (cmp) { | |
ac3d33df | 1318 | git_error_set(GIT_ERROR_REFERENCE, "old reference value does not match"); |
91123661 CMN |
1319 | error = GIT_EMODIFIED; |
1320 | goto on_error; | |
9b148098 CMN |
1321 | } |
1322 | ||
ac3d33df | 1323 | if (ref->type == GIT_REFERENCE_SYMBOLIC) |
1afe1400 CMN |
1324 | new_target = ref->target.symbolic; |
1325 | else | |
1326 | new_id = &ref->target.oid; | |
1327 | ||
1328 | error = cmp_old_ref(&cmp, _backend, ref->name, new_id, new_target); | |
1329 | if (error < 0 && error != GIT_ENOTFOUND) | |
1330 | goto on_error; | |
1331 | ||
1332 | /* Don't update if we have the same value */ | |
1333 | if (!error && !cmp) { | |
1334 | error = 0; | |
1335 | goto on_error; /* not really error */ | |
1336 | } | |
1337 | ||
ab8d9242 CMN |
1338 | if (update_reflog) { |
1339 | if ((error = should_write_reflog(&should_write, backend->repo, ref->name)) < 0) | |
4b7e1b9e | 1340 | goto on_error; |
ab8d9242 CMN |
1341 | |
1342 | if (should_write) { | |
1343 | if ((error = reflog_append(backend, ref, NULL, NULL, who, message)) < 0) | |
1344 | goto on_error; | |
1345 | if ((error = maybe_append_head(backend, ref, who, message)) < 0) | |
1346 | goto on_error; | |
1347 | } | |
a57dd3b7 CMN |
1348 | } |
1349 | ||
ab8d9242 | 1350 | return loose_commit(file, ref); |
9b148098 CMN |
1351 | |
1352 | on_error: | |
ab8d9242 | 1353 | git_filebuf_cleanup(file); |
fc4728e3 | 1354 | return error; |
d00d5464 ET |
1355 | } |
1356 | ||
0c9c969a | 1357 | static void refdb_fs_backend__prune_refs( |
ac3d33df JK |
1358 | refdb_fs_backend *backend, |
1359 | const char *ref_name, | |
0c9c969a | 1360 | const char *prefix) |
ac3d33df JK |
1361 | { |
1362 | git_buf relative_path = GIT_BUF_INIT; | |
1363 | git_buf base_path = GIT_BUF_INIT; | |
1364 | size_t commonlen; | |
1365 | ||
1366 | assert(backend && ref_name); | |
1367 | ||
1368 | if (git_buf_sets(&relative_path, ref_name) < 0) | |
1369 | goto cleanup; | |
1370 | ||
1371 | git_path_squash_slashes(&relative_path); | |
1372 | if ((commonlen = git_path_common_dirlen("refs/heads/", git_buf_cstr(&relative_path))) == strlen("refs/heads/") || | |
1373 | (commonlen = git_path_common_dirlen("refs/tags/", git_buf_cstr(&relative_path))) == strlen("refs/tags/") || | |
1374 | (commonlen = git_path_common_dirlen("refs/remotes/", git_buf_cstr(&relative_path))) == strlen("refs/remotes/")) { | |
1375 | ||
1376 | git_buf_truncate(&relative_path, commonlen); | |
1377 | ||
0c9c969a UG |
1378 | if (prefix) { |
1379 | if (git_buf_join3(&base_path, '/', backend->commonpath, prefix, git_buf_cstr(&relative_path)) < 0) | |
ac3d33df JK |
1380 | goto cleanup; |
1381 | } else { | |
1382 | if (git_buf_joinpath(&base_path, backend->commonpath, git_buf_cstr(&relative_path)) < 0) | |
1383 | goto cleanup; | |
1384 | } | |
1385 | ||
1386 | git_futils_rmdir_r(ref_name + commonlen, git_buf_cstr(&base_path), GIT_RMDIR_EMPTY_PARENTS | GIT_RMDIR_SKIP_ROOT); | |
1387 | } | |
1388 | ||
1389 | cleanup: | |
1390 | git_buf_dispose(&relative_path); | |
1391 | git_buf_dispose(&base_path); | |
1392 | } | |
1393 | ||
d00d5464 ET |
1394 | static int refdb_fs_backend__delete( |
1395 | git_refdb_backend *_backend, | |
7ee8c7e6 CMN |
1396 | const char *ref_name, |
1397 | const git_oid *old_id, const char *old_target) | |
d00d5464 | 1398 | { |
0c9c969a | 1399 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
77ad6754 | 1400 | git_filebuf file = GIT_FILEBUF_INIT; |
ab8d9242 | 1401 | int error = 0; |
d00d5464 | 1402 | |
fe372740 | 1403 | assert(backend && ref_name); |
d00d5464 | 1404 | |
7ee8c7e6 CMN |
1405 | if ((error = loose_lock(&file, backend, ref_name)) < 0) |
1406 | return error; | |
1407 | ||
01d0c02d CMN |
1408 | if ((error = refdb_reflog_fs__delete(_backend, ref_name)) < 0) { |
1409 | git_filebuf_cleanup(&file); | |
1410 | return error; | |
1411 | } | |
1412 | ||
ab8d9242 CMN |
1413 | return refdb_fs_backend__delete_tail(_backend, &file, ref_name, old_id, old_target); |
1414 | } | |
1415 | ||
0c9c969a UG |
1416 | static int loose_delete(refdb_fs_backend *backend, const char *ref_name) |
1417 | { | |
1418 | git_buf loose_path = GIT_BUF_INIT; | |
1419 | int error = 0; | |
1420 | ||
1421 | if (git_buf_joinpath(&loose_path, backend->commonpath, ref_name) < 0) | |
1422 | return -1; | |
1423 | ||
1424 | error = p_unlink(loose_path.ptr); | |
1425 | if (error < 0 && errno == ENOENT) | |
1426 | error = GIT_ENOTFOUND; | |
1427 | else if (error != 0) | |
1428 | error = -1; | |
1429 | ||
1430 | git_buf_dispose(&loose_path); | |
1431 | ||
1432 | return error; | |
1433 | } | |
1434 | ||
ab8d9242 CMN |
1435 | static int refdb_fs_backend__delete_tail( |
1436 | git_refdb_backend *_backend, | |
1437 | git_filebuf *file, | |
1438 | const char *ref_name, | |
1439 | const git_oid *old_id, const char *old_target) | |
1440 | { | |
0c9c969a | 1441 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
ab8d9242 | 1442 | int error = 0, cmp = 0; |
0c9c969a | 1443 | bool packed_deleted = 0; |
ab8d9242 | 1444 | |
7ee8c7e6 | 1445 | error = cmp_old_ref(&cmp, _backend, ref_name, old_id, old_target); |
7ee8c7e6 CMN |
1446 | if (error < 0) |
1447 | goto cleanup; | |
1448 | ||
1449 | if (cmp) { | |
ac3d33df | 1450 | git_error_set(GIT_ERROR_REFERENCE, "old reference value does not match"); |
7ee8c7e6 CMN |
1451 | error = GIT_EMODIFIED; |
1452 | goto cleanup; | |
1453 | } | |
1454 | ||
0c9c969a UG |
1455 | /* |
1456 | * To ensure that an external observer will see either the current ref value | |
1457 | * (because the loose ref still exists), or a missing ref (after the packed-file is | |
1458 | * unlocked, there will be nothing left), we must ensure things happen in the | |
1459 | * following order: | |
1460 | * | |
1461 | * - the packed-ref file is locked and loaded, as well as a loose one, if it exists | |
1462 | * - we optimistically delete a packed ref, keeping track of whether it existed | |
1463 | * - we delete the loose ref, note that we have its .lock | |
1464 | * - the loose ref is "unlocked", then the packed-ref file is rewritten and unlocked | |
1465 | * - we should prune the path components if a loose ref was deleted | |
1466 | * | |
1467 | * Note that, because our packed backend doesn't expose its filesystem lock, | |
1468 | * we might not be able to guarantee that this is what actually happens (ie. | |
1469 | * as our current code never write packed-refs.lock, nothing stops observers | |
1470 | * from grabbing a "stale" value from there). | |
1471 | */ | |
1472 | if ((error = packed_delete(backend, ref_name)) < 0 && error != GIT_ENOTFOUND) | |
7ee8c7e6 | 1473 | goto cleanup; |
d00d5464 | 1474 | |
0c9c969a UG |
1475 | if (error == 0) |
1476 | packed_deleted = 1; | |
fe372740 | 1477 | |
0c9c969a | 1478 | if ((error = loose_delete(backend, ref_name)) < 0 && error != GIT_ENOTFOUND) |
7ee8c7e6 | 1479 | goto cleanup; |
4e6e2ff2 | 1480 | |
7ee8c7e6 | 1481 | if (error == GIT_ENOTFOUND) { |
0c9c969a | 1482 | error = packed_deleted ? 0 : ref_error_notfound(ref_name); |
7ee8c7e6 CMN |
1483 | goto cleanup; |
1484 | } | |
1485 | ||
7ee8c7e6 | 1486 | cleanup: |
ab8d9242 | 1487 | git_filebuf_cleanup(file); |
0c9c969a UG |
1488 | if (error == 0) |
1489 | refdb_fs_backend__prune_refs(backend, ref_name, ""); | |
7ee8c7e6 | 1490 | return error; |
d00d5464 ET |
1491 | } |
1492 | ||
a57dd3b7 CMN |
1493 | static int refdb_reflog_fs__rename(git_refdb_backend *_backend, const char *old_name, const char *new_name); |
1494 | ||
4e6e2ff2 VM |
1495 | static int refdb_fs_backend__rename( |
1496 | git_reference **out, | |
1497 | git_refdb_backend *_backend, | |
1498 | const char *old_name, | |
1499 | const char *new_name, | |
110df893 | 1500 | int force, |
a57dd3b7 | 1501 | const git_signature *who, |
110df893 | 1502 | const char *message) |
4e6e2ff2 | 1503 | { |
0c9c969a UG |
1504 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
1505 | git_reference *old, *new = NULL; | |
a57dd3b7 | 1506 | git_filebuf file = GIT_FILEBUF_INIT; |
4e6e2ff2 VM |
1507 | int error; |
1508 | ||
fe372740 | 1509 | assert(backend); |
4e6e2ff2 | 1510 | |
fe372740 RB |
1511 | if ((error = reference_path_available( |
1512 | backend, new_name, old_name, force)) < 0 || | |
1513 | (error = refdb_fs_backend__lookup(&old, _backend, old_name)) < 0) | |
4e6e2ff2 VM |
1514 | return error; |
1515 | ||
7ee8c7e6 | 1516 | if ((error = refdb_fs_backend__delete(_backend, old_name, NULL, NULL)) < 0) { |
4e6e2ff2 VM |
1517 | git_reference_free(old); |
1518 | return error; | |
1519 | } | |
1520 | ||
0c9c969a | 1521 | new = git_reference__realloc(&old, new_name); |
fe372740 RB |
1522 | if (!new) { |
1523 | git_reference_free(old); | |
1524 | return -1; | |
4e6e2ff2 VM |
1525 | } |
1526 | ||
7ee8c7e6 | 1527 | if ((error = loose_lock(&file, backend, new->name)) < 0) { |
a57dd3b7 CMN |
1528 | git_reference_free(new); |
1529 | return error; | |
1530 | } | |
1531 | ||
1532 | /* Try to rename the refog; it's ok if the old doesn't exist */ | |
1533 | error = refdb_reflog_fs__rename(_backend, old_name, new_name); | |
1534 | if (((error == 0) || (error == GIT_ENOTFOUND)) && | |
d578b45f | 1535 | ((error = reflog_append(backend, new, git_reference_target(new), NULL, who, message)) < 0)) { |
a57dd3b7 CMN |
1536 | git_reference_free(new); |
1537 | git_filebuf_cleanup(&file); | |
1538 | return error; | |
1539 | } | |
1540 | ||
1541 | if (error < 0) { | |
1542 | git_reference_free(new); | |
1543 | git_filebuf_cleanup(&file); | |
1544 | return error; | |
1545 | } | |
1546 | ||
1547 | ||
1548 | if ((error = loose_commit(&file, new)) < 0 || out == NULL) { | |
4e6e2ff2 | 1549 | git_reference_free(new); |
fe372740 | 1550 | return error; |
4e6e2ff2 VM |
1551 | } |
1552 | ||
fe372740 | 1553 | *out = new; |
4e6e2ff2 VM |
1554 | return 0; |
1555 | } | |
1556 | ||
d00d5464 ET |
1557 | static int refdb_fs_backend__compress(git_refdb_backend *_backend) |
1558 | { | |
2e09106e | 1559 | int error; |
0c9c969a | 1560 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
d00d5464 | 1561 | |
fe372740 | 1562 | assert(backend); |
d00d5464 | 1563 | |
2e09106e CMN |
1564 | if ((error = packed_reload(backend)) < 0 || /* load the existing packfile */ |
1565 | (error = packed_loadloose(backend)) < 0 || /* add all the loose refs */ | |
1566 | (error = packed_write(backend)) < 0) /* write back to disk */ | |
1567 | return error; | |
d00d5464 ET |
1568 | |
1569 | return 0; | |
1570 | } | |
1571 | ||
d00d5464 ET |
1572 | static void refdb_fs_backend__free(git_refdb_backend *_backend) |
1573 | { | |
0c9c969a | 1574 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
d00d5464 | 1575 | |
fe372740 | 1576 | assert(backend); |
d00d5464 | 1577 | |
fe372740 | 1578 | git_sortedcache_free(backend->refcache); |
71dd0861 | 1579 | git__free(backend->gitpath); |
e0a6c28e | 1580 | git__free(backend->commonpath); |
d00d5464 ET |
1581 | git__free(backend); |
1582 | } | |
1583 | ||
83580562 | 1584 | static char *setup_namespace(git_repository *repo, const char *in) |
8cddf9b8 | 1585 | { |
83580562 ET |
1586 | git_buf path = GIT_BUF_INIT; |
1587 | char *parts, *start, *end, *out = NULL; | |
8cddf9b8 | 1588 | |
83580562 ET |
1589 | if (!in) |
1590 | goto done; | |
69a3c766 | 1591 | |
83580562 | 1592 | git_buf_puts(&path, in); |
8cddf9b8 VM |
1593 | |
1594 | /* if the repo is not namespaced, nothing else to do */ | |
83580562 ET |
1595 | if (repo->namespace == NULL) { |
1596 | out = git_buf_detach(&path); | |
1597 | goto done; | |
1598 | } | |
8cddf9b8 VM |
1599 | |
1600 | parts = end = git__strdup(repo->namespace); | |
1601 | if (parts == NULL) | |
83580562 | 1602 | goto done; |
8cddf9b8 | 1603 | |
fe372740 | 1604 | /* |
8cddf9b8 VM |
1605 | * From `man gitnamespaces`: |
1606 | * namespaces which include a / will expand to a hierarchy | |
1607 | * of namespaces; for example, GIT_NAMESPACE=foo/bar will store | |
1608 | * refs under refs/namespaces/foo/refs/namespaces/bar/ | |
1609 | */ | |
83580562 ET |
1610 | while ((start = git__strsep(&end, "/")) != NULL) |
1611 | git_buf_printf(&path, "refs/namespaces/%s/", start); | |
8cddf9b8 | 1612 | |
83580562 | 1613 | git_buf_printf(&path, "refs/namespaces/%s/refs", end); |
1ed356dc | 1614 | git__free(parts); |
8cddf9b8 VM |
1615 | |
1616 | /* Make sure that the folder with the namespace exists */ | |
83580562 ET |
1617 | if (git_futils_mkdir_relative(git_buf_cstr(&path), in, 0777, |
1618 | GIT_MKDIR_PATH, NULL) < 0) | |
1619 | goto done; | |
8cddf9b8 | 1620 | |
71dd0861 | 1621 | /* Return root of the namespaced gitpath, i.e. without the trailing '/refs' */ |
83580562 ET |
1622 | git_buf_rtruncate_at_char(&path, '/'); |
1623 | out = git_buf_detach(&path); | |
1624 | ||
1625 | done: | |
ac3d33df | 1626 | git_buf_dispose(&path); |
83580562 | 1627 | return out; |
8cddf9b8 VM |
1628 | } |
1629 | ||
b976f3c2 CMN |
1630 | static int reflog_alloc(git_reflog **reflog, const char *name) |
1631 | { | |
1632 | git_reflog *log; | |
1633 | ||
1634 | *reflog = NULL; | |
1635 | ||
1636 | log = git__calloc(1, sizeof(git_reflog)); | |
ac3d33df | 1637 | GIT_ERROR_CHECK_ALLOC(log); |
b976f3c2 CMN |
1638 | |
1639 | log->ref_name = git__strdup(name); | |
ac3d33df | 1640 | GIT_ERROR_CHECK_ALLOC(log->ref_name); |
b976f3c2 CMN |
1641 | |
1642 | if (git_vector_init(&log->entries, 0, NULL) < 0) { | |
1643 | git__free(log->ref_name); | |
1644 | git__free(log); | |
1645 | return -1; | |
1646 | } | |
1647 | ||
1648 | *reflog = log; | |
1649 | ||
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | static int reflog_parse(git_reflog *log, const char *buf, size_t buf_size) | |
1654 | { | |
0c9c969a | 1655 | git_parse_ctx parser = GIT_PARSE_CTX_INIT; |
b976f3c2 | 1656 | |
0c9c969a UG |
1657 | if ((git_parse_ctx_init(&parser, buf, buf_size)) < 0) |
1658 | return -1; | |
b976f3c2 | 1659 | |
0c9c969a UG |
1660 | for (; parser.remain_len; git_parse_advance_line(&parser)) { |
1661 | git_reflog_entry *entry; | |
1662 | const char *sig; | |
1663 | char c; | |
b976f3c2 | 1664 | |
0c9c969a UG |
1665 | entry = git__calloc(1, sizeof(*entry)); |
1666 | GIT_ERROR_CHECK_ALLOC(entry); | |
1667 | entry->committer = git__calloc(1, sizeof(*entry->committer)); | |
1668 | GIT_ERROR_CHECK_ALLOC(entry->committer); | |
b976f3c2 | 1669 | |
0c9c969a UG |
1670 | if (git_parse_advance_oid(&entry->oid_old, &parser) < 0 || |
1671 | git_parse_advance_expected(&parser, " ", 1) < 0 || | |
1672 | git_parse_advance_oid(&entry->oid_cur, &parser) < 0) | |
1673 | goto next; | |
b976f3c2 | 1674 | |
0c9c969a UG |
1675 | sig = parser.line; |
1676 | while (git_parse_peek(&c, &parser, 0) == 0 && c != '\t' && c != '\n') | |
1677 | git_parse_advance_chars(&parser, 1); | |
b976f3c2 | 1678 | |
0c9c969a UG |
1679 | if (git_signature__parse(entry->committer, &sig, parser.line, NULL, 0) < 0) |
1680 | goto next; | |
b976f3c2 | 1681 | |
0c9c969a UG |
1682 | if (c == '\t') { |
1683 | size_t len; | |
1684 | git_parse_advance_chars(&parser, 1); | |
b976f3c2 | 1685 | |
0c9c969a UG |
1686 | len = parser.line_len; |
1687 | if (parser.line[len - 1] == '\n') | |
1688 | len--; | |
b976f3c2 | 1689 | |
0c9c969a | 1690 | entry->msg = git__strndup(parser.line, len); |
ac3d33df | 1691 | GIT_ERROR_CHECK_ALLOC(entry->msg); |
0c9c969a | 1692 | } |
b976f3c2 | 1693 | |
0c9c969a UG |
1694 | if ((git_vector_insert(&log->entries, entry)) < 0) { |
1695 | git_reflog_entry__free(entry); | |
1696 | return -1; | |
1697 | } | |
b976f3c2 | 1698 | |
0c9c969a UG |
1699 | continue; |
1700 | ||
1701 | next: | |
1702 | git_reflog_entry__free(entry); | |
b976f3c2 CMN |
1703 | } |
1704 | ||
1705 | return 0; | |
b976f3c2 CMN |
1706 | } |
1707 | ||
1708 | static int create_new_reflog_file(const char *filepath) | |
1709 | { | |
1710 | int fd, error; | |
1711 | ||
1712 | if ((error = git_futils_mkpath2file(filepath, GIT_REFLOG_DIR_MODE)) < 0) | |
1713 | return error; | |
1714 | ||
1715 | if ((fd = p_open(filepath, | |
8d5ec910 | 1716 | O_WRONLY | O_CREAT, |
b976f3c2 CMN |
1717 | GIT_REFLOG_FILE_MODE)) < 0) |
1718 | return -1; | |
1719 | ||
1720 | return p_close(fd); | |
1721 | } | |
1722 | ||
1723 | GIT_INLINE(int) retrieve_reflog_path(git_buf *path, git_repository *repo, const char *name) | |
1724 | { | |
4b3ec53c XL |
1725 | if (strcmp(name, GIT_HEAD_FILE) == 0) |
1726 | return git_buf_join3(path, '/', repo->gitdir, GIT_REFLOG_DIR, name); | |
e9403024 | 1727 | return git_buf_join3(path, '/', repo->commondir, GIT_REFLOG_DIR, name); |
b976f3c2 CMN |
1728 | } |
1729 | ||
8d5ec910 CMN |
1730 | static int refdb_reflog_fs__ensure_log(git_refdb_backend *_backend, const char *name) |
1731 | { | |
1732 | refdb_fs_backend *backend; | |
1733 | git_repository *repo; | |
1734 | git_buf path = GIT_BUF_INIT; | |
1735 | int error; | |
1736 | ||
1737 | assert(_backend && name); | |
1738 | ||
0c9c969a | 1739 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
8d5ec910 CMN |
1740 | repo = backend->repo; |
1741 | ||
1742 | if ((error = retrieve_reflog_path(&path, repo, name)) < 0) | |
1743 | return error; | |
1744 | ||
ae32c54e | 1745 | error = create_new_reflog_file(git_buf_cstr(&path)); |
ac3d33df | 1746 | git_buf_dispose(&path); |
ae32c54e CMN |
1747 | |
1748 | return error; | |
8d5ec910 CMN |
1749 | } |
1750 | ||
6f13a305 CMN |
1751 | static int has_reflog(git_repository *repo, const char *name) |
1752 | { | |
1753 | int ret = 0; | |
1754 | git_buf path = GIT_BUF_INIT; | |
1755 | ||
1756 | if (retrieve_reflog_path(&path, repo, name) < 0) | |
1757 | goto cleanup; | |
1758 | ||
1759 | ret = git_path_isfile(git_buf_cstr(&path)); | |
1760 | ||
1761 | cleanup: | |
ac3d33df | 1762 | git_buf_dispose(&path); |
6f13a305 CMN |
1763 | return ret; |
1764 | } | |
1765 | ||
f2105129 CMN |
1766 | static int refdb_reflog_fs__has_log(git_refdb_backend *_backend, const char *name) |
1767 | { | |
1768 | refdb_fs_backend *backend; | |
1769 | ||
1770 | assert(_backend && name); | |
1771 | ||
0c9c969a | 1772 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
f2105129 CMN |
1773 | |
1774 | return has_reflog(backend->repo, name); | |
1775 | } | |
1776 | ||
b976f3c2 CMN |
1777 | static int refdb_reflog_fs__read(git_reflog **out, git_refdb_backend *_backend, const char *name) |
1778 | { | |
1779 | int error = -1; | |
1780 | git_buf log_path = GIT_BUF_INIT; | |
1781 | git_buf log_file = GIT_BUF_INIT; | |
1782 | git_reflog *log = NULL; | |
1783 | git_repository *repo; | |
1784 | refdb_fs_backend *backend; | |
1785 | ||
1786 | assert(out && _backend && name); | |
1787 | ||
0c9c969a | 1788 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
b976f3c2 CMN |
1789 | repo = backend->repo; |
1790 | ||
1791 | if (reflog_alloc(&log, name) < 0) | |
1792 | return -1; | |
1793 | ||
1794 | if (retrieve_reflog_path(&log_path, repo, name) < 0) | |
1795 | goto cleanup; | |
1796 | ||
1797 | error = git_futils_readbuffer(&log_file, git_buf_cstr(&log_path)); | |
1798 | if (error < 0 && error != GIT_ENOTFOUND) | |
1799 | goto cleanup; | |
1800 | ||
1801 | if ((error == GIT_ENOTFOUND) && | |
1802 | ((error = create_new_reflog_file(git_buf_cstr(&log_path))) < 0)) | |
1803 | goto cleanup; | |
ac3d33df | 1804 | |
b976f3c2 CMN |
1805 | if ((error = reflog_parse(log, |
1806 | git_buf_cstr(&log_file), git_buf_len(&log_file))) < 0) | |
1807 | goto cleanup; | |
1808 | ||
1809 | *out = log; | |
1810 | goto success; | |
1811 | ||
1812 | cleanup: | |
1813 | git_reflog_free(log); | |
1814 | ||
1815 | success: | |
ac3d33df JK |
1816 | git_buf_dispose(&log_file); |
1817 | git_buf_dispose(&log_path); | |
b976f3c2 CMN |
1818 | |
1819 | return error; | |
1820 | } | |
1821 | ||
1822 | static int serialize_reflog_entry( | |
1823 | git_buf *buf, | |
1824 | const git_oid *oid_old, | |
1825 | const git_oid *oid_new, | |
1826 | const git_signature *committer, | |
1827 | const char *msg) | |
1828 | { | |
1829 | char raw_old[GIT_OID_HEXSZ+1]; | |
1830 | char raw_new[GIT_OID_HEXSZ+1]; | |
1831 | ||
1832 | git_oid_tostr(raw_old, GIT_OID_HEXSZ+1, oid_old); | |
1833 | git_oid_tostr(raw_new, GIT_OID_HEXSZ+1, oid_new); | |
1834 | ||
1835 | git_buf_clear(buf); | |
1836 | ||
1837 | git_buf_puts(buf, raw_old); | |
1838 | git_buf_putc(buf, ' '); | |
1839 | git_buf_puts(buf, raw_new); | |
1840 | ||
1841 | git_signature__writebuf(buf, " ", committer); | |
1842 | ||
1843 | /* drop trailing LF */ | |
1844 | git_buf_rtrim(buf); | |
1845 | ||
1846 | if (msg) { | |
0c9c969a UG |
1847 | size_t i; |
1848 | ||
b976f3c2 CMN |
1849 | git_buf_putc(buf, '\t'); |
1850 | git_buf_puts(buf, msg); | |
0c9c969a UG |
1851 | |
1852 | for (i = 0; i < buf->size - 2; i++) | |
1853 | if (buf->ptr[i] == '\n') | |
1854 | buf->ptr[i] = ' '; | |
1855 | git_buf_rtrim(buf); | |
b976f3c2 CMN |
1856 | } |
1857 | ||
1858 | git_buf_putc(buf, '\n'); | |
1859 | ||
1860 | return git_buf_oom(buf); | |
1861 | } | |
1862 | ||
110df893 CMN |
1863 | static int lock_reflog(git_filebuf *file, refdb_fs_backend *backend, const char *refname) |
1864 | { | |
1865 | git_repository *repo; | |
1866 | git_buf log_path = GIT_BUF_INIT; | |
1867 | int error; | |
1868 | ||
1869 | repo = backend->repo; | |
1870 | ||
4b3ec53c | 1871 | if (!git_path_isvalid(backend->repo, refname, 0, GIT_PATH_REJECT_FILESYSTEM_DEFAULTS)) { |
ac3d33df | 1872 | git_error_set(GIT_ERROR_INVALID, "invalid reference name '%s'", refname); |
a64119e3 ET |
1873 | return GIT_EINVALIDSPEC; |
1874 | } | |
1875 | ||
110df893 CMN |
1876 | if (retrieve_reflog_path(&log_path, repo, refname) < 0) |
1877 | return -1; | |
1878 | ||
1879 | if (!git_path_isfile(git_buf_cstr(&log_path))) { | |
ac3d33df | 1880 | git_error_set(GIT_ERROR_INVALID, |
909d5494 | 1881 | "log file for reference '%s' doesn't exist", refname); |
110df893 CMN |
1882 | error = -1; |
1883 | goto cleanup; | |
1884 | } | |
1885 | ||
1886 | error = git_filebuf_open(file, git_buf_cstr(&log_path), 0, GIT_REFLOG_FILE_MODE); | |
1887 | ||
1888 | cleanup: | |
ac3d33df | 1889 | git_buf_dispose(&log_path); |
110df893 CMN |
1890 | |
1891 | return error; | |
1892 | } | |
1893 | ||
b976f3c2 CMN |
1894 | static int refdb_reflog_fs__write(git_refdb_backend *_backend, git_reflog *reflog) |
1895 | { | |
1896 | int error = -1; | |
1897 | unsigned int i; | |
1898 | git_reflog_entry *entry; | |
b976f3c2 | 1899 | refdb_fs_backend *backend; |
b976f3c2 CMN |
1900 | git_buf log = GIT_BUF_INIT; |
1901 | git_filebuf fbuf = GIT_FILEBUF_INIT; | |
1902 | ||
1903 | assert(_backend && reflog); | |
1904 | ||
0c9c969a | 1905 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
b976f3c2 | 1906 | |
110df893 | 1907 | if ((error = lock_reflog(&fbuf, backend, reflog->ref_name)) < 0) |
b976f3c2 CMN |
1908 | return -1; |
1909 | ||
b976f3c2 CMN |
1910 | git_vector_foreach(&reflog->entries, i, entry) { |
1911 | if (serialize_reflog_entry(&log, &(entry->oid_old), &(entry->oid_cur), entry->committer, entry->msg) < 0) | |
1912 | goto cleanup; | |
1913 | ||
1914 | if ((error = git_filebuf_write(&fbuf, log.ptr, log.size)) < 0) | |
1915 | goto cleanup; | |
1916 | } | |
1917 | ||
1d3a8aeb | 1918 | error = git_filebuf_commit(&fbuf); |
b976f3c2 CMN |
1919 | goto success; |
1920 | ||
1921 | cleanup: | |
1922 | git_filebuf_cleanup(&fbuf); | |
1923 | ||
1924 | success: | |
ac3d33df | 1925 | git_buf_dispose(&log); |
110df893 | 1926 | |
b976f3c2 CMN |
1927 | return error; |
1928 | } | |
1929 | ||
a57dd3b7 | 1930 | /* Append to the reflog, must be called under reference lock */ |
4b7e1b9e | 1931 | 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 | 1932 | { |
af3dcb0e | 1933 | int error, is_symbolic, open_flags; |
4b7e1b9e | 1934 | git_oid old_id = {{0}}, new_id = {{0}}; |
a57dd3b7 CMN |
1935 | git_buf buf = GIT_BUF_INIT, path = GIT_BUF_INIT; |
1936 | git_repository *repo = backend->repo; | |
1937 | ||
ac3d33df | 1938 | is_symbolic = ref->type == GIT_REFERENCE_SYMBOLIC; |
4b7e1b9e CMN |
1939 | |
1940 | /* "normal" symbolic updates do not write */ | |
1941 | if (is_symbolic && | |
1942 | strcmp(ref->name, GIT_HEAD_FILE) && | |
1943 | !(old && new)) | |
a57dd3b7 CMN |
1944 | return 0; |
1945 | ||
0c9c969a | 1946 | /* From here on is_symbolic also means that it's HEAD */ |
4b7e1b9e CMN |
1947 | |
1948 | if (old) { | |
1949 | git_oid_cpy(&old_id, old); | |
afc57eb4 | 1950 | } else { |
4b7e1b9e | 1951 | error = git_reference_name_to_id(&old_id, repo, ref->name); |
afc57eb4 | 1952 | if (error < 0 && error != GIT_ENOTFOUND) |
4b7e1b9e CMN |
1953 | return error; |
1954 | } | |
1955 | ||
6aaae94a CMN |
1956 | if (new) { |
1957 | git_oid_cpy(&new_id, new); | |
1958 | } else { | |
1959 | if (!is_symbolic) { | |
1960 | git_oid_cpy(&new_id, git_reference_target(ref)); | |
1961 | } else { | |
1962 | error = git_reference_name_to_id(&new_id, repo, git_reference_symbolic_target(ref)); | |
1963 | if (error < 0 && error != GIT_ENOTFOUND) | |
1964 | return error; | |
1965 | /* detaching HEAD does not create an entry */ | |
1966 | if (error == GIT_ENOTFOUND) | |
1967 | return 0; | |
4b7e1b9e | 1968 | |
ac3d33df | 1969 | git_error_clear(); |
6aaae94a | 1970 | } |
7f058b86 | 1971 | } |
4b7e1b9e | 1972 | |
a57dd3b7 CMN |
1973 | if ((error = serialize_reflog_entry(&buf, &old_id, &new_id, who, message)) < 0) |
1974 | goto cleanup; | |
1975 | ||
1976 | if ((error = retrieve_reflog_path(&path, repo, ref->name)) < 0) | |
1977 | goto cleanup; | |
1978 | ||
1979 | if (((error = git_futils_mkpath2file(git_buf_cstr(&path), 0777)) < 0) && | |
1980 | (error != GIT_EEXISTS)) { | |
1981 | goto cleanup; | |
1982 | } | |
1983 | ||
1589a93a JH |
1984 | /* If the new branch matches part of the namespace of a previously deleted branch, |
1985 | * there maybe an obsolete/unused directory (or directory hierarchy) in the way. | |
1986 | */ | |
0a700ee3 | 1987 | if (git_path_isdir(git_buf_cstr(&path))) { |
ce5553d4 CMN |
1988 | if ((error = git_futils_rmdir_r(git_buf_cstr(&path), NULL, GIT_RMDIR_SKIP_NONEMPTY)) < 0) { |
1989 | if (error == GIT_ENOTFOUND) | |
1990 | error = 0; | |
1991 | } else if (git_path_isdir(git_buf_cstr(&path))) { | |
ac3d33df | 1992 | git_error_set(GIT_ERROR_REFERENCE, "cannot create reflog at '%s', there are reflogs beneath that folder", |
0a700ee3 ET |
1993 | ref->name); |
1994 | error = GIT_EDIRECTORY; | |
1995 | } | |
1996 | ||
1997 | if (error != 0) | |
1998 | goto cleanup; | |
1589a93a JH |
1999 | } |
2000 | ||
af3dcb0e ET |
2001 | open_flags = O_WRONLY | O_CREAT | O_APPEND; |
2002 | ||
1c04a96b | 2003 | if (backend->fsync) |
af3dcb0e ET |
2004 | open_flags |= O_FSYNC; |
2005 | ||
2006 | error = git_futils_writebuffer(&buf, git_buf_cstr(&path), open_flags, GIT_REFLOG_FILE_MODE); | |
a57dd3b7 CMN |
2007 | |
2008 | cleanup: | |
ac3d33df JK |
2009 | git_buf_dispose(&buf); |
2010 | git_buf_dispose(&path); | |
a57dd3b7 | 2011 | |
b976f3c2 CMN |
2012 | return error; |
2013 | } | |
2014 | ||
b976f3c2 CMN |
2015 | static int refdb_reflog_fs__rename(git_refdb_backend *_backend, const char *old_name, const char *new_name) |
2016 | { | |
2017 | int error = 0, fd; | |
2018 | git_buf old_path = GIT_BUF_INIT; | |
2019 | git_buf new_path = GIT_BUF_INIT; | |
2020 | git_buf temp_path = GIT_BUF_INIT; | |
2021 | git_buf normalized = GIT_BUF_INIT; | |
2022 | git_repository *repo; | |
2023 | refdb_fs_backend *backend; | |
2024 | ||
2025 | assert(_backend && old_name && new_name); | |
2026 | ||
0c9c969a | 2027 | backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
b976f3c2 CMN |
2028 | repo = backend->repo; |
2029 | ||
2030 | if ((error = git_reference__normalize_name( | |
ac3d33df | 2031 | &normalized, new_name, GIT_REFERENCE_FORMAT_ALLOW_ONELEVEL)) < 0) |
b976f3c2 CMN |
2032 | return error; |
2033 | ||
84f56cb0 | 2034 | if (git_buf_joinpath(&temp_path, repo->gitdir, GIT_REFLOG_DIR) < 0) |
b976f3c2 CMN |
2035 | return -1; |
2036 | ||
2037 | if (git_buf_joinpath(&old_path, git_buf_cstr(&temp_path), old_name) < 0) | |
2038 | return -1; | |
2039 | ||
2040 | if (git_buf_joinpath(&new_path, git_buf_cstr(&temp_path), git_buf_cstr(&normalized)) < 0) | |
2041 | return -1; | |
2042 | ||
a57dd3b7 CMN |
2043 | if (!git_path_exists(git_buf_cstr(&old_path))) { |
2044 | error = GIT_ENOTFOUND; | |
2045 | goto cleanup; | |
2046 | } | |
2047 | ||
b976f3c2 CMN |
2048 | /* |
2049 | * Move the reflog to a temporary place. This two-phase renaming is required | |
2050 | * in order to cope with funny renaming use cases when one tries to move a reference | |
2051 | * to a partially colliding namespace: | |
2052 | * - a/b -> a/b/c | |
2053 | * - a/b/c/d -> a/b/c | |
2054 | */ | |
2055 | if (git_buf_joinpath(&temp_path, git_buf_cstr(&temp_path), "temp_reflog") < 0) | |
2056 | return -1; | |
2057 | ||
1d3a8aeb | 2058 | if ((fd = git_futils_mktmp(&temp_path, git_buf_cstr(&temp_path), GIT_REFLOG_FILE_MODE)) < 0) { |
b976f3c2 CMN |
2059 | error = -1; |
2060 | goto cleanup; | |
2061 | } | |
2062 | ||
2063 | p_close(fd); | |
2064 | ||
2065 | if (p_rename(git_buf_cstr(&old_path), git_buf_cstr(&temp_path)) < 0) { | |
ac3d33df | 2066 | git_error_set(GIT_ERROR_OS, "failed to rename reflog for %s", new_name); |
b976f3c2 CMN |
2067 | error = -1; |
2068 | goto cleanup; | |
2069 | } | |
2070 | ||
ac3d33df | 2071 | if (git_path_isdir(git_buf_cstr(&new_path)) && |
b976f3c2 CMN |
2072 | (git_futils_rmdir_r(git_buf_cstr(&new_path), NULL, GIT_RMDIR_SKIP_NONEMPTY) < 0)) { |
2073 | error = -1; | |
2074 | goto cleanup; | |
2075 | } | |
2076 | ||
2077 | if (git_futils_mkpath2file(git_buf_cstr(&new_path), GIT_REFLOG_DIR_MODE) < 0) { | |
2078 | error = -1; | |
2079 | goto cleanup; | |
2080 | } | |
2081 | ||
2082 | if (p_rename(git_buf_cstr(&temp_path), git_buf_cstr(&new_path)) < 0) { | |
ac3d33df | 2083 | git_error_set(GIT_ERROR_OS, "failed to rename reflog for %s", new_name); |
b976f3c2 CMN |
2084 | error = -1; |
2085 | } | |
2086 | ||
2087 | cleanup: | |
ac3d33df JK |
2088 | git_buf_dispose(&temp_path); |
2089 | git_buf_dispose(&old_path); | |
2090 | git_buf_dispose(&new_path); | |
2091 | git_buf_dispose(&normalized); | |
b976f3c2 CMN |
2092 | |
2093 | return error; | |
2094 | } | |
2095 | ||
b976f3c2 CMN |
2096 | static int refdb_reflog_fs__delete(git_refdb_backend *_backend, const char *name) |
2097 | { | |
0c9c969a | 2098 | refdb_fs_backend *backend = GIT_CONTAINER_OF(_backend, refdb_fs_backend, parent); |
b976f3c2 | 2099 | git_buf path = GIT_BUF_INIT; |
ac3d33df | 2100 | int error; |
b976f3c2 CMN |
2101 | |
2102 | assert(_backend && name); | |
2103 | ||
ac3d33df JK |
2104 | if ((error = retrieve_reflog_path(&path, backend->repo, name)) < 0) |
2105 | goto out; | |
2106 | ||
2107 | if (!git_path_exists(path.ptr)) | |
2108 | goto out; | |
b976f3c2 | 2109 | |
ac3d33df JK |
2110 | if ((error = p_unlink(path.ptr)) < 0) |
2111 | goto out; | |
b976f3c2 | 2112 | |
0c9c969a | 2113 | refdb_fs_backend__prune_refs(backend, name, GIT_REFLOG_DIR); |
b976f3c2 | 2114 | |
ac3d33df JK |
2115 | out: |
2116 | git_buf_dispose(&path); | |
b976f3c2 CMN |
2117 | |
2118 | return error; | |
b976f3c2 CMN |
2119 | } |
2120 | ||
d00d5464 ET |
2121 | int git_refdb_backend_fs( |
2122 | git_refdb_backend **backend_out, | |
4e4eab52 | 2123 | git_repository *repository) |
d00d5464 | 2124 | { |
219d3457 | 2125 | int t = 0; |
71dd0861 | 2126 | git_buf gitpath = GIT_BUF_INIT; |
d00d5464 ET |
2127 | refdb_fs_backend *backend; |
2128 | ||
2129 | backend = git__calloc(1, sizeof(refdb_fs_backend)); | |
ac3d33df | 2130 | GIT_ERROR_CHECK_ALLOC(backend); |
d00d5464 | 2131 | |
66a70851 UG |
2132 | if (git_refdb_init_backend(&backend->parent, GIT_REFDB_BACKEND_VERSION) < 0) |
2133 | goto fail; | |
2134 | ||
d00d5464 | 2135 | backend->repo = repository; |
bade5194 | 2136 | |
83580562 ET |
2137 | if (repository->gitdir) { |
2138 | backend->gitpath = setup_namespace(repository, repository->gitdir); | |
bade5194 | 2139 | |
83580562 ET |
2140 | if (backend->gitpath == NULL) |
2141 | goto fail; | |
2142 | } | |
2143 | ||
2144 | if (repository->commondir) { | |
2145 | backend->commonpath = setup_namespace(repository, repository->commondir); | |
2146 | ||
2147 | if (backend->commonpath == NULL) | |
2148 | goto fail; | |
2149 | } | |
d00d5464 | 2150 | |
e0a6c28e | 2151 | if (git_buf_joinpath(&gitpath, backend->commonpath, GIT_PACKEDREFS_FILE) < 0 || |
fe372740 RB |
2152 | git_sortedcache_new( |
2153 | &backend->refcache, offsetof(struct packref, name), | |
71dd0861 | 2154 | NULL, NULL, packref_cmp, git_buf_cstr(&gitpath)) < 0) |
fe372740 RB |
2155 | goto fail; |
2156 | ||
ac3d33df | 2157 | git_buf_dispose(&gitpath); |
fe372740 | 2158 | |
0c9c969a | 2159 | if (!git_repository__configmap_lookup(&t, backend->repo, GIT_CONFIGMAP_IGNORECASE) && t) { |
219d3457 RB |
2160 | backend->iterator_flags |= GIT_ITERATOR_IGNORE_CASE; |
2161 | backend->direach_flags |= GIT_PATH_DIR_IGNORE_CASE; | |
2162 | } | |
0c9c969a | 2163 | if (!git_repository__configmap_lookup(&t, backend->repo, GIT_CONFIGMAP_PRECOMPOSE) && t) { |
219d3457 RB |
2164 | backend->iterator_flags |= GIT_ITERATOR_PRECOMPOSE_UNICODE; |
2165 | backend->direach_flags |= GIT_PATH_DIR_PRECOMPOSE_UNICODE; | |
2166 | } | |
0c9c969a | 2167 | if ((!git_repository__configmap_lookup(&t, backend->repo, GIT_CONFIGMAP_FSYNCOBJECTFILES) && t) || |
6c23704d | 2168 | git_repository__fsync_gitdir) |
1c04a96b | 2169 | backend->fsync = 1; |
eae0bfdc | 2170 | backend->iterator_flags |= GIT_ITERATOR_DESCEND_SYMLINKS; |
219d3457 | 2171 | |
d00d5464 ET |
2172 | backend->parent.exists = &refdb_fs_backend__exists; |
2173 | backend->parent.lookup = &refdb_fs_backend__lookup; | |
4def7035 | 2174 | backend->parent.iterator = &refdb_fs_backend__iterator; |
d00d5464 | 2175 | backend->parent.write = &refdb_fs_backend__write; |
e3f3868a | 2176 | backend->parent.del = &refdb_fs_backend__delete; |
4e6e2ff2 | 2177 | backend->parent.rename = &refdb_fs_backend__rename; |
d00d5464 | 2178 | backend->parent.compress = &refdb_fs_backend__compress; |
ab8d9242 CMN |
2179 | backend->parent.lock = &refdb_fs_backend__lock; |
2180 | backend->parent.unlock = &refdb_fs_backend__unlock; | |
f2105129 | 2181 | backend->parent.has_log = &refdb_reflog_fs__has_log; |
8d5ec910 | 2182 | backend->parent.ensure_log = &refdb_reflog_fs__ensure_log; |
d00d5464 | 2183 | backend->parent.free = &refdb_fs_backend__free; |
b976f3c2 CMN |
2184 | backend->parent.reflog_read = &refdb_reflog_fs__read; |
2185 | backend->parent.reflog_write = &refdb_reflog_fs__write; | |
b976f3c2 | 2186 | backend->parent.reflog_rename = &refdb_reflog_fs__rename; |
b976f3c2 | 2187 | backend->parent.reflog_delete = &refdb_reflog_fs__delete; |
d00d5464 ET |
2188 | |
2189 | *backend_out = (git_refdb_backend *)backend; | |
2190 | return 0; | |
fe372740 RB |
2191 | |
2192 | fail: | |
ac3d33df | 2193 | git_buf_dispose(&gitpath); |
71dd0861 | 2194 | git__free(backend->gitpath); |
e0a6c28e | 2195 | git__free(backend->commonpath); |
fe372740 RB |
2196 | git__free(backend); |
2197 | return -1; | |
d00d5464 | 2198 | } |