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Commit | Line | Data |
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9282e921 | 1 | /* |
5e0de328 | 2 | * Copyright (C) 2009-2012 the libgit2 contributors |
9282e921 | 3 | * |
bb742ede VM |
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. | |
9282e921 | 6 | */ |
7 | ||
8 | #include "refs.h" | |
9 | #include "hash.h" | |
10 | #include "repository.h" | |
11 | #include "fileops.h" | |
01ad7b3a | 12 | #include "pack.h" |
a5cd086d | 13 | #include "reflog.h" |
9282e921 | 14 | |
87d3acf4 VM |
15 | #include <git2/tag.h> |
16 | #include <git2/object.h> | |
c07d9c95 | 17 | #include <git2/oid.h> |
4ba23be1 | 18 | #include <git2/branch.h> |
87d3acf4 | 19 | |
c2b67043 | 20 | GIT__USE_STRMAP; |
01fed0a8 | 21 | |
f201d613 RB |
22 | #define DEFAULT_NESTING_LEVEL 5 |
23 | #define MAX_NESTING_LEVEL 10 | |
9282e921 | 24 | |
d4a0b124 VM |
25 | enum { |
26 | GIT_PACKREF_HAS_PEEL = 1, | |
27 | GIT_PACKREF_WAS_LOOSE = 2 | |
28 | }; | |
86194b24 | 29 | |
d4a0b124 VM |
30 | struct packref { |
31 | git_oid oid; | |
32 | git_oid peel; | |
33 | char flags; | |
34 | char name[GIT_FLEX_ARRAY]; | |
35 | }; | |
86194b24 | 36 | |
d4a0b124 | 37 | static int reference_read( |
13224ea4 | 38 | git_buf *file_content, |
d4a0b124 VM |
39 | time_t *mtime, |
40 | const char *repo_path, | |
41 | const char *ref_name, | |
42 | int *updated); | |
a46ec457 | 43 | |
87d3acf4 | 44 | /* loose refs */ |
13224ea4 VM |
45 | static int loose_parse_symbolic(git_reference *ref, git_buf *file_content); |
46 | static int loose_parse_oid(git_oid *ref, git_buf *file_content); | |
d4a0b124 VM |
47 | static int loose_lookup(git_reference *ref); |
48 | static int loose_lookup_to_packfile(struct packref **ref_out, | |
49 | git_repository *repo, const char *name); | |
50 | static int loose_write(git_reference *ref); | |
87d3acf4 VM |
51 | |
52 | /* packed refs */ | |
d4a0b124 VM |
53 | static int packed_parse_peel(struct packref *tag_ref, |
54 | const char **buffer_out, const char *buffer_end); | |
55 | static int packed_parse_oid(struct packref **ref_out, | |
56 | const char **buffer_out, const char *buffer_end); | |
87d3acf4 VM |
57 | static int packed_load(git_repository *repo); |
58 | static int packed_loadloose(git_repository *repository); | |
d4a0b124 VM |
59 | static int packed_write_ref(struct packref *ref, git_filebuf *file); |
60 | static int packed_find_peel(git_repository *repo, struct packref *ref); | |
87d3acf4 VM |
61 | static int packed_remove_loose(git_repository *repo, git_vector *packing_list); |
62 | static int packed_sort(const void *a, const void *b); | |
d4a0b124 | 63 | static int packed_lookup(git_reference *ref); |
87d3acf4 VM |
64 | static int packed_write(git_repository *repo); |
65 | ||
95cde17c | 66 | /* internal helpers */ |
1a481123 VM |
67 | static int reference_path_available(git_repository *repo, |
68 | const char *ref, const char *old_ref); | |
d4a0b124 VM |
69 | static int reference_delete(git_reference *ref); |
70 | static int reference_lookup(git_reference *ref); | |
95cde17c | 71 | |
d4a0b124 | 72 | void git_reference_free(git_reference *reference) |
9282e921 | 73 | { |
2f8a8ab2 VM |
74 | if (reference == NULL) |
75 | return; | |
9282e921 | 76 | |
d4a0b124 | 77 | git__free(reference->name); |
97769280 | 78 | reference->name = NULL; |
9282e921 | 79 | |
97769280 | 80 | if (reference->flags & GIT_REF_SYMBOLIC) { |
d4a0b124 | 81 | git__free(reference->target.symbolic); |
97769280 RB |
82 | reference->target.symbolic = NULL; |
83 | } | |
9282e921 | 84 | |
3286c408 | 85 | git__free(reference); |
9282e921 | 86 | } |
87 | ||
fa515656 | 88 | static int reference_alloc( |
d4a0b124 | 89 | git_reference **ref_out, |
87d3acf4 | 90 | git_repository *repo, |
d4a0b124 | 91 | const char *name) |
87d3acf4 | 92 | { |
d4a0b124 | 93 | git_reference *reference = NULL; |
9282e921 | 94 | |
1d8cc731 | 95 | assert(ref_out && repo && name); |
96 | ||
d4a0b124 | 97 | reference = git__malloc(sizeof(git_reference)); |
1a481123 | 98 | GITERR_CHECK_ALLOC(reference); |
9282e921 | 99 | |
d4a0b124 | 100 | memset(reference, 0x0, sizeof(git_reference)); |
2f8a8ab2 | 101 | reference->owner = repo; |
1d8cc731 | 102 | |
d4a0b124 | 103 | reference->name = git__strdup(name); |
1a481123 | 104 | GITERR_CHECK_ALLOC(reference->name); |
9282e921 | 105 | |
2f8a8ab2 | 106 | *ref_out = reference; |
1a481123 | 107 | return 0; |
1d8cc731 | 108 | } |
109 | ||
1a481123 VM |
110 | static int reference_read( |
111 | git_buf *file_content, | |
112 | time_t *mtime, | |
113 | const char *repo_path, | |
114 | const char *ref_name, | |
115 | int *updated) | |
7341bf87 | 116 | { |
97769280 | 117 | git_buf path = GIT_BUF_INIT; |
1a481123 | 118 | int result; |
7341bf87 | 119 | |
c4982328 CMN |
120 | assert(file_content && repo_path && ref_name); |
121 | ||
7341bf87 | 122 | /* Determine the full path of the file */ |
1a481123 VM |
123 | if (git_buf_joinpath(&path, repo_path, ref_name) < 0) |
124 | return -1; | |
97769280 | 125 | |
744cc03e RB |
126 | result = git_futils_readbuffer_updated( |
127 | file_content, path.ptr, mtime, NULL, updated); | |
97769280 | 128 | git_buf_free(&path); |
2fe293b6 | 129 | |
1a481123 | 130 | return result; |
7341bf87 VM |
131 | } |
132 | ||
13224ea4 | 133 | static int loose_parse_symbolic(git_reference *ref, git_buf *file_content) |
2f8a8ab2 | 134 | { |
44ef8b1b | 135 | const unsigned int header_len = (unsigned int)strlen(GIT_SYMREF); |
2f8a8ab2 | 136 | const char *refname_start; |
9282e921 | 137 | |
13224ea4 | 138 | refname_start = (const char *)file_content->ptr; |
9282e921 | 139 | |
2fe293b6 RB |
140 | if (git_buf_len(file_content) < header_len + 1) { |
141 | giterr_set(GITERR_REFERENCE, "Corrupted loose reference file"); | |
142 | return -1; | |
143 | } | |
9282e921 | 144 | |
932d1baf | 145 | /* |
2f8a8ab2 | 146 | * Assume we have already checked for the header |
932d1baf | 147 | * before calling this function |
2f8a8ab2 | 148 | */ |
2f8a8ab2 | 149 | refname_start += header_len; |
9282e921 | 150 | |
d4a0b124 | 151 | ref->target.symbolic = git__strdup(refname_start); |
1a481123 | 152 | GITERR_CHECK_ALLOC(ref->target.symbolic); |
9282e921 | 153 | |
1a481123 | 154 | return 0; |
9282e921 | 155 | } |
156 | ||
13224ea4 | 157 | static int loose_parse_oid(git_oid *oid, git_buf *file_content) |
2f8a8ab2 | 158 | { |
47f44b6e CMN |
159 | size_t len; |
160 | const char *str; | |
161 | ||
162 | len = git_buf_len(file_content); | |
163 | if (len < GIT_OID_HEXSZ) | |
164 | goto corrupted; | |
165 | ||
166 | /* str is guranteed to be zero-terminated */ | |
167 | str = git_buf_cstr(file_content); | |
168 | ||
169 | /* If the file is longer than 40 chars, the 41st must be a space */ | |
170 | if (git_oid_fromstr(oid, git_buf_cstr(file_content)) < 0) | |
171 | goto corrupted; | |
172 | ||
173 | /* If the file is longer than 40 chars, the 41st must be a space */ | |
174 | str += GIT_OID_HEXSZ; | |
175 | if (*str == '\0' || git__isspace(*str)) | |
2fe293b6 | 176 | return 0; |
1a481123 | 177 | |
47f44b6e | 178 | corrupted: |
1a481123 VM |
179 | giterr_set(GITERR_REFERENCE, "Corrupted loose reference file"); |
180 | return -1; | |
9282e921 | 181 | } |
182 | ||
2e2e9785 | 183 | static git_ref_t loose_guess_rtype(const git_buf *full_path) |
00571828 | 184 | { |
13224ea4 | 185 | git_buf ref_file = GIT_BUF_INIT; |
2e2e9785 | 186 | git_ref_t type; |
00571828 VM |
187 | |
188 | type = GIT_REF_INVALID; | |
189 | ||
0d0fa7c3 | 190 | if (git_futils_readbuffer(&ref_file, full_path->ptr) == 0) { |
13224ea4 | 191 | if (git__prefixcmp((const char *)(ref_file.ptr), GIT_SYMREF) == 0) |
00571828 VM |
192 | type = GIT_REF_SYMBOLIC; |
193 | else | |
194 | type = GIT_REF_OID; | |
195 | } | |
196 | ||
13224ea4 | 197 | git_buf_free(&ref_file); |
00571828 VM |
198 | return type; |
199 | } | |
200 | ||
d4a0b124 VM |
201 | static int loose_lookup(git_reference *ref) |
202 | { | |
1a481123 | 203 | int result, updated; |
13224ea4 | 204 | git_buf ref_file = GIT_BUF_INIT; |
d4a0b124 | 205 | |
1a481123 VM |
206 | result = reference_read(&ref_file, &ref->mtime, |
207 | ref->owner->path_repository, ref->name, &updated); | |
208 | ||
209 | if (result < 0) | |
210 | return result; | |
d4a0b124 VM |
211 | |
212 | if (!updated) | |
1a481123 | 213 | return 0; |
d4a0b124 | 214 | |
fa515656 | 215 | if (ref->flags & GIT_REF_SYMBOLIC) { |
854eccbb | 216 | git__free(ref->target.symbolic); |
fa515656 VM |
217 | ref->target.symbolic = NULL; |
218 | } | |
d4a0b124 VM |
219 | |
220 | ref->flags = 0; | |
221 | ||
13224ea4 | 222 | if (git__prefixcmp((const char *)(ref_file.ptr), GIT_SYMREF) == 0) { |
d4a0b124 | 223 | ref->flags |= GIT_REF_SYMBOLIC; |
7ae5ab56 | 224 | git_buf_rtrim(&ref_file); |
1a481123 | 225 | result = loose_parse_symbolic(ref, &ref_file); |
d4a0b124 VM |
226 | } else { |
227 | ref->flags |= GIT_REF_OID; | |
1a481123 | 228 | result = loose_parse_oid(&ref->target.oid, &ref_file); |
d4a0b124 VM |
229 | } |
230 | ||
13224ea4 | 231 | git_buf_free(&ref_file); |
1a481123 | 232 | return result; |
d4a0b124 VM |
233 | } |
234 | ||
235 | static int loose_lookup_to_packfile( | |
236 | struct packref **ref_out, | |
932d1baf | 237 | git_repository *repo, |
d4a0b124 | 238 | const char *name) |
9282e921 | 239 | { |
13224ea4 | 240 | git_buf ref_file = GIT_BUF_INIT; |
d4a0b124 VM |
241 | struct packref *ref = NULL; |
242 | size_t name_len; | |
9282e921 | 243 | |
2f8a8ab2 | 244 | *ref_out = NULL; |
9282e921 | 245 | |
1a481123 VM |
246 | if (reference_read(&ref_file, NULL, repo->path_repository, name, NULL) < 0) |
247 | return -1; | |
9282e921 | 248 | |
2fe293b6 RB |
249 | git_buf_rtrim(&ref_file); |
250 | ||
d4a0b124 VM |
251 | name_len = strlen(name); |
252 | ref = git__malloc(sizeof(struct packref) + name_len + 1); | |
1a481123 | 253 | GITERR_CHECK_ALLOC(ref); |
1d8cc731 | 254 | |
d4a0b124 VM |
255 | memcpy(ref->name, name, name_len); |
256 | ref->name[name_len] = 0; | |
1d8cc731 | 257 | |
1a481123 VM |
258 | if (loose_parse_oid(&ref->oid, &ref_file) < 0) { |
259 | git_buf_free(&ref_file); | |
2bc8fa02 | 260 | git__free(ref); |
1a481123 VM |
261 | return -1; |
262 | } | |
ff5873ad | 263 | |
d4a0b124 VM |
264 | ref->flags = GIT_PACKREF_WAS_LOOSE; |
265 | ||
2f8a8ab2 | 266 | *ref_out = ref; |
13224ea4 | 267 | git_buf_free(&ref_file); |
1a481123 | 268 | return 0; |
9282e921 | 269 | } |
270 | ||
d4a0b124 | 271 | static int loose_write(git_reference *ref) |
87d3acf4 | 272 | { |
b762e576 | 273 | git_filebuf file = GIT_FILEBUF_INIT; |
97769280 | 274 | git_buf ref_path = GIT_BUF_INIT; |
7341bf87 | 275 | struct stat st; |
87d3acf4 | 276 | |
0d64bef9 | 277 | /* Remove a possibly existing empty directory hierarchy |
4615f0f7 | 278 | * which name would collide with the reference name |
279 | */ | |
331e7de9 RB |
280 | if (git_futils_rmdir_r(ref->name, ref->owner->path_repository, |
281 | GIT_RMDIR_SKIP_NONEMPTY) < 0) | |
282 | return -1; | |
283 | ||
284 | if (git_buf_joinpath(&ref_path, ref->owner->path_repository, ref->name) < 0) | |
0d64bef9 | 285 | return -1; |
4615f0f7 | 286 | |
1a481123 VM |
287 | if (git_filebuf_open(&file, ref_path.ptr, GIT_FILEBUF_FORCE) < 0) { |
288 | git_buf_free(&ref_path); | |
289 | return -1; | |
290 | } | |
87d3acf4 | 291 | |
1a481123 | 292 | git_buf_free(&ref_path); |
87d3acf4 | 293 | |
d4a0b124 | 294 | if (ref->flags & GIT_REF_OID) { |
e7e0e20f | 295 | char oid[GIT_OID_HEXSZ + 1]; |
87d3acf4 | 296 | |
d4a0b124 VM |
297 | git_oid_fmt(oid, &ref->target.oid); |
298 | oid[GIT_OID_HEXSZ] = '\0'; | |
87d3acf4 | 299 | |
1a481123 | 300 | git_filebuf_printf(&file, "%s\n", oid); |
87d3acf4 | 301 | |
1a481123 VM |
302 | } else if (ref->flags & GIT_REF_SYMBOLIC) { |
303 | git_filebuf_printf(&file, GIT_SYMREF "%s\n", ref->target.symbolic); | |
87d3acf4 | 304 | } else { |
1a481123 | 305 | assert(0); /* don't let this happen */ |
87d3acf4 VM |
306 | } |
307 | ||
1a481123 | 308 | if (p_stat(ref_path.ptr, &st) == 0) |
7341bf87 VM |
309 | ref->mtime = st.st_mtime; |
310 | ||
d4a0b124 | 311 | return git_filebuf_commit(&file, GIT_REFS_FILE_MODE); |
87d3acf4 VM |
312 | } |
313 | ||
87d3acf4 | 314 | static int packed_parse_peel( |
d4a0b124 | 315 | struct packref *tag_ref, |
932d1baf | 316 | const char **buffer_out, |
2f8a8ab2 | 317 | const char *buffer_end) |
9282e921 | 318 | { |
2f8a8ab2 VM |
319 | const char *buffer = *buffer_out + 1; |
320 | ||
321 | assert(buffer[-1] == '^'); | |
9282e921 | 322 | |
323 | /* Ensure it's not the first entry of the file */ | |
2f8a8ab2 | 324 | if (tag_ref == NULL) |
1a481123 | 325 | goto corrupt; |
9282e921 | 326 | |
327 | /* Ensure reference is a tag */ | |
d4a0b124 | 328 | if (git__prefixcmp(tag_ref->name, GIT_REFS_TAGS_DIR) != 0) |
1a481123 | 329 | goto corrupt; |
9282e921 | 330 | |
2f8a8ab2 | 331 | if (buffer + GIT_OID_HEXSZ >= buffer_end) |
1a481123 | 332 | goto corrupt; |
9282e921 | 333 | |
2f8a8ab2 | 334 | /* Is this a valid object id? */ |
0d0fa7c3 | 335 | if (git_oid_fromstr(&tag_ref->peel, buffer) < 0) |
1a481123 | 336 | goto corrupt; |
2f8a8ab2 | 337 | |
ff5873ad VM |
338 | buffer = buffer + GIT_OID_HEXSZ; |
339 | if (*buffer == '\r') | |
340 | buffer++; | |
341 | ||
342 | if (*buffer != '\n') | |
1a481123 | 343 | goto corrupt; |
ff5873ad VM |
344 | |
345 | *buffer_out = buffer + 1; | |
1a481123 VM |
346 | return 0; |
347 | ||
348 | corrupt: | |
349 | giterr_set(GITERR_REFERENCE, "The packed references file is corrupted"); | |
350 | return -1; | |
9282e921 | 351 | } |
352 | ||
87d3acf4 | 353 | static int packed_parse_oid( |
d4a0b124 | 354 | struct packref **ref_out, |
2f8a8ab2 VM |
355 | const char **buffer_out, |
356 | const char *buffer_end) | |
9282e921 | 357 | { |
d4a0b124 | 358 | struct packref *ref = NULL; |
2f8a8ab2 VM |
359 | |
360 | const char *buffer = *buffer_out; | |
361 | const char *refname_begin, *refname_end; | |
362 | ||
d4a0b124 | 363 | size_t refname_len; |
1d8cc731 | 364 | git_oid id; |
9282e921 | 365 | |
2f8a8ab2 | 366 | refname_begin = (buffer + GIT_OID_HEXSZ + 1); |
1a481123 VM |
367 | if (refname_begin >= buffer_end || refname_begin[-1] != ' ') |
368 | goto corrupt; | |
9282e921 | 369 | |
2f8a8ab2 | 370 | /* Is this a valid object id? */ |
1a481123 VM |
371 | if (git_oid_fromstr(&id, buffer) < 0) |
372 | goto corrupt; | |
9282e921 | 373 | |
2f8a8ab2 | 374 | refname_end = memchr(refname_begin, '\n', buffer_end - refname_begin); |
1a481123 VM |
375 | if (refname_end == NULL) |
376 | goto corrupt; | |
9282e921 | 377 | |
d4a0b124 VM |
378 | if (refname_end[-1] == '\r') |
379 | refname_end--; | |
9282e921 | 380 | |
d4a0b124 | 381 | refname_len = refname_end - refname_begin; |
9282e921 | 382 | |
d4a0b124 | 383 | ref = git__malloc(sizeof(struct packref) + refname_len + 1); |
1a481123 | 384 | GITERR_CHECK_ALLOC(ref); |
1d8cc731 | 385 | |
d4a0b124 VM |
386 | memcpy(ref->name, refname_begin, refname_len); |
387 | ref->name[refname_len] = 0; | |
6c8b458d | 388 | |
86194b24 | 389 | git_oid_cpy(&ref->oid, &id); |
d4a0b124 VM |
390 | |
391 | ref->flags = 0; | |
9282e921 | 392 | |
2f8a8ab2 | 393 | *ref_out = ref; |
9282e921 | 394 | *buffer_out = refname_end + 1; |
395 | ||
1a481123 | 396 | return 0; |
2f8a8ab2 | 397 | |
1a481123 | 398 | corrupt: |
854eccbb | 399 | git__free(ref); |
1a481123 VM |
400 | giterr_set(GITERR_REFERENCE, "The packed references file is corrupted"); |
401 | return -1; | |
9282e921 | 402 | } |
403 | ||
87d3acf4 | 404 | static int packed_load(git_repository *repo) |
9282e921 | 405 | { |
1a481123 | 406 | int result, updated; |
13224ea4 | 407 | git_buf packfile = GIT_BUF_INIT; |
2f8a8ab2 | 408 | const char *buffer_start, *buffer_end; |
87d3acf4 VM |
409 | git_refcache *ref_cache = &repo->references; |
410 | ||
c4982328 CMN |
411 | /* First we make sure we have allocated the hash table */ |
412 | if (ref_cache->packfile == NULL) { | |
c2b67043 | 413 | ref_cache->packfile = git_strmap_alloc(); |
1a481123 | 414 | GITERR_CHECK_ALLOC(ref_cache->packfile); |
7341bf87 VM |
415 | } |
416 | ||
1a481123 | 417 | result = reference_read(&packfile, &ref_cache->packfile_time, |
d4a0b124 | 418 | repo->path_repository, GIT_PACKEDREFS_FILE, &updated); |
87d3acf4 | 419 | |
c4982328 CMN |
420 | /* |
421 | * If we couldn't find the file, we need to clear the table and | |
422 | * return. On any other error, we return that error. If everything | |
423 | * went fine and the file wasn't updated, then there's nothing new | |
424 | * for us here, so just return. Anything else means we need to | |
425 | * refresh the packed refs. | |
426 | */ | |
904b67e6 | 427 | if (result == GIT_ENOTFOUND) { |
c2b67043 | 428 | git_strmap_clear(ref_cache->packfile); |
1a481123 | 429 | return 0; |
c4982328 | 430 | } |
2f8a8ab2 | 431 | |
1a481123 VM |
432 | if (result < 0) |
433 | return -1; | |
434 | ||
435 | if (!updated) | |
436 | return 0; | |
437 | ||
c4982328 CMN |
438 | /* |
439 | * At this point, we want to refresh the packed refs. We already | |
440 | * have the contents in our buffer. | |
441 | */ | |
c2b67043 | 442 | git_strmap_clear(ref_cache->packfile); |
9282e921 | 443 | |
13224ea4 VM |
444 | buffer_start = (const char *)packfile.ptr; |
445 | buffer_end = (const char *)(buffer_start) + packfile.size; | |
9282e921 | 446 | |
7c8a7b91 VM |
447 | while (buffer_start < buffer_end && buffer_start[0] == '#') { |
448 | buffer_start = strchr(buffer_start, '\n'); | |
1a481123 VM |
449 | if (buffer_start == NULL) |
450 | goto parse_failed; | |
451 | ||
ddc9e79a | 452 | buffer_start++; |
7c8a7b91 | 453 | } |
ddc9e79a | 454 | |
9282e921 | 455 | while (buffer_start < buffer_end) { |
01fed0a8 | 456 | int err; |
d4a0b124 | 457 | struct packref *ref = NULL; |
2f8a8ab2 | 458 | |
1a481123 VM |
459 | if (packed_parse_oid(&ref, &buffer_start, buffer_end) < 0) |
460 | goto parse_failed; | |
2f8a8ab2 | 461 | |
9282e921 | 462 | if (buffer_start[0] == '^') { |
1a481123 VM |
463 | if (packed_parse_peel(ref, &buffer_start, buffer_end) < 0) |
464 | goto parse_failed; | |
2f8a8ab2 | 465 | } |
9282e921 | 466 | |
c2b67043 | 467 | git_strmap_insert(ref_cache->packfile, ref->name, ref, err); |
01fed0a8 RB |
468 | if (err < 0) |
469 | goto parse_failed; | |
2f8a8ab2 | 470 | } |
9282e921 | 471 | |
13224ea4 | 472 | git_buf_free(&packfile); |
1a481123 | 473 | return 0; |
7341bf87 | 474 | |
1a481123 | 475 | parse_failed: |
c2b67043 | 476 | git_strmap_free(ref_cache->packfile); |
7341bf87 | 477 | ref_cache->packfile = NULL; |
13224ea4 | 478 | git_buf_free(&packfile); |
1a481123 | 479 | return -1; |
2f8a8ab2 | 480 | } |
9282e921 | 481 | |
00571828 | 482 | |
00571828 | 483 | struct dirent_list_data { |
7ad96e51 | 484 | git_repository *repo; |
00571828 VM |
485 | size_t repo_path_len; |
486 | unsigned int list_flags; | |
09e8de0f VM |
487 | |
488 | int (*callback)(const char *, void *); | |
489 | void *callback_payload; | |
5dca2010 | 490 | int callback_error; |
00571828 VM |
491 | }; |
492 | ||
1a481123 | 493 | static int _dirent_loose_listall(void *_data, git_buf *full_path) |
00571828 VM |
494 | { |
495 | struct dirent_list_data *data = (struct dirent_list_data *)_data; | |
97769280 | 496 | const char *file_path = full_path->ptr + data->repo_path_len; |
00571828 | 497 | |
1a481123 | 498 | if (git_path_isdir(full_path->ptr) == true) |
1744fafe | 499 | return git_path_direach(full_path, _dirent_loose_listall, _data); |
00571828 | 500 | |
7ad96e51 | 501 | /* do not add twice a reference that exists already in the packfile */ |
b5abb881 | 502 | if ((data->list_flags & GIT_REF_PACKED) != 0 && |
c2b67043 | 503 | git_strmap_exists(data->repo->references.packfile, file_path)) |
1a481123 | 504 | return 0; |
7ad96e51 | 505 | |
09e8de0f VM |
506 | if (data->list_flags != GIT_REF_LISTALL) { |
507 | if ((data->list_flags & loose_guess_rtype(full_path)) == 0) | |
1a481123 | 508 | return 0; /* we are filtering out this reference */ |
09e8de0f | 509 | } |
00571828 | 510 | |
c2948c77 | 511 | /* Locked references aren't returned */ |
512 | if (!git__suffixcmp(file_path, GIT_FILELOCK_EXTENSION)) | |
513 | return 0; | |
514 | ||
5dca2010 RB |
515 | if (data->callback(file_path, data->callback_payload)) |
516 | data->callback_error = GIT_EUSER; | |
517 | ||
518 | return data->callback_error; | |
00571828 VM |
519 | } |
520 | ||
97769280 | 521 | static int _dirent_loose_load(void *data, git_buf *full_path) |
2f8a8ab2 | 522 | { |
87d3acf4 | 523 | git_repository *repository = (git_repository *)data; |
6c8b458d | 524 | void *old_ref = NULL; |
d4a0b124 | 525 | struct packref *ref; |
97769280 | 526 | const char *file_path; |
01fed0a8 | 527 | int err; |
86194b24 | 528 | |
1a481123 | 529 | if (git_path_isdir(full_path->ptr) == true) |
1744fafe | 530 | return git_path_direach(full_path, _dirent_loose_load, repository); |
9282e921 | 531 | |
97769280 | 532 | file_path = full_path->ptr + strlen(repository->path_repository); |
d4a0b124 | 533 | |
1a481123 VM |
534 | if (loose_lookup_to_packfile(&ref, repository, file_path) < 0) |
535 | return -1; | |
87d3acf4 | 536 | |
c2b67043 | 537 | git_strmap_insert2( |
01fed0a8 RB |
538 | repository->references.packfile, ref->name, ref, old_ref, err); |
539 | if (err < 0) { | |
1a481123 VM |
540 | git__free(ref); |
541 | return -1; | |
87d3acf4 | 542 | } |
9282e921 | 543 | |
1a481123 VM |
544 | git__free(old_ref); |
545 | return 0; | |
2f8a8ab2 VM |
546 | } |
547 | ||
87d3acf4 VM |
548 | /* |
549 | * Load all the loose references from the repository | |
550 | * into the in-memory Packfile, and build a vector with | |
551 | * all the references so it can be written back to | |
552 | * disk. | |
553 | */ | |
554 | static int packed_loadloose(git_repository *repository) | |
2f8a8ab2 | 555 | { |
97769280 | 556 | git_buf refs_path = GIT_BUF_INIT; |
1a481123 | 557 | int result; |
86194b24 | 558 | |
87d3acf4 VM |
559 | /* the packfile must have been previously loaded! */ |
560 | assert(repository->references.packfile); | |
9282e921 | 561 | |
1a481123 VM |
562 | if (git_buf_joinpath(&refs_path, repository->path_repository, GIT_REFS_DIR) < 0) |
563 | return -1; | |
86194b24 | 564 | |
87d3acf4 VM |
565 | /* |
566 | * Load all the loose files from disk into the Packfile table. | |
567 | * This will overwrite any old packed entries with their | |
932d1baf | 568 | * updated loose versions |
87d3acf4 | 569 | */ |
1a481123 | 570 | result = git_path_direach(&refs_path, _dirent_loose_load, repository); |
97769280 | 571 | git_buf_free(&refs_path); |
1a481123 VM |
572 | |
573 | return result; | |
2f8a8ab2 | 574 | } |
9282e921 | 575 | |
87d3acf4 VM |
576 | /* |
577 | * Write a single reference into a packfile | |
578 | */ | |
d4a0b124 | 579 | static int packed_write_ref(struct packref *ref, git_filebuf *file) |
2f8a8ab2 | 580 | { |
87d3acf4 | 581 | char oid[GIT_OID_HEXSZ + 1]; |
2f8a8ab2 | 582 | |
87d3acf4 VM |
583 | git_oid_fmt(oid, &ref->oid); |
584 | oid[GIT_OID_HEXSZ] = 0; | |
2f8a8ab2 | 585 | |
932d1baf | 586 | /* |
87d3acf4 VM |
587 | * For references that peel to an object in the repo, we must |
588 | * write the resulting peel on a separate line, e.g. | |
589 | * | |
590 | * 6fa8a902cc1d18527e1355773c86721945475d37 refs/tags/libgit2-0.4 | |
591 | * ^2ec0cb7959b0bf965d54f95453f5b4b34e8d3100 | |
592 | * | |
593 | * This obviously only applies to tags. | |
594 | * The required peels have already been loaded into `ref->peel_target`. | |
595 | */ | |
d4a0b124 | 596 | if (ref->flags & GIT_PACKREF_HAS_PEEL) { |
87d3acf4 | 597 | char peel[GIT_OID_HEXSZ + 1]; |
d4a0b124 | 598 | git_oid_fmt(peel, &ref->peel); |
87d3acf4 VM |
599 | peel[GIT_OID_HEXSZ] = 0; |
600 | ||
1a481123 VM |
601 | if (git_filebuf_printf(file, "%s %s\n^%s\n", oid, ref->name, peel) < 0) |
602 | return -1; | |
87d3acf4 | 603 | } else { |
1a481123 VM |
604 | if (git_filebuf_printf(file, "%s %s\n", oid, ref->name) < 0) |
605 | return -1; | |
87d3acf4 VM |
606 | } |
607 | ||
1a481123 | 608 | return 0; |
9282e921 | 609 | } |
610 | ||
87d3acf4 VM |
611 | /* |
612 | * Find out what object this reference resolves to. | |
613 | * | |
932d1baf | 614 | * For references that point to a 'big' tag (e.g. an |
87d3acf4 VM |
615 | * actual tag object on the repository), we need to |
616 | * cache on the packfile the OID of the object to | |
617 | * which that 'big tag' is pointing to. | |
618 | */ | |
d4a0b124 | 619 | static int packed_find_peel(git_repository *repo, struct packref *ref) |
9282e921 | 620 | { |
d79f1da6 | 621 | git_object *object; |
32054c24 | 622 | |
d4a0b124 | 623 | if (ref->flags & GIT_PACKREF_HAS_PEEL) |
1a481123 | 624 | return 0; |
9282e921 | 625 | |
87d3acf4 VM |
626 | /* |
627 | * Only applies to tags, i.e. references | |
628 | * in the /refs/tags folder | |
629 | */ | |
d4a0b124 | 630 | if (git__prefixcmp(ref->name, GIT_REFS_TAGS_DIR) != 0) |
1a481123 | 631 | return 0; |
9282e921 | 632 | |
87d3acf4 | 633 | /* |
d79f1da6 | 634 | * Find the tagged object in the repository |
87d3acf4 | 635 | */ |
1a481123 VM |
636 | if (git_object_lookup(&object, repo, &ref->oid, GIT_OBJ_ANY) < 0) |
637 | return -1; | |
86194b24 | 638 | |
87d3acf4 | 639 | /* |
d79f1da6 VM |
640 | * If the tagged object is a Tag object, we need to resolve it; |
641 | * if the ref is actually a 'weak' ref, we don't need to resolve | |
642 | * anything. | |
87d3acf4 | 643 | */ |
d79f1da6 VM |
644 | if (git_object_type(object) == GIT_OBJ_TAG) { |
645 | git_tag *tag = (git_tag *)object; | |
86194b24 | 646 | |
d79f1da6 VM |
647 | /* |
648 | * Find the object pointed at by this tag | |
649 | */ | |
d4a0b124 VM |
650 | git_oid_cpy(&ref->peel, git_tag_target_oid(tag)); |
651 | ref->flags |= GIT_PACKREF_HAS_PEEL; | |
d79f1da6 VM |
652 | |
653 | /* | |
654 | * The reference has now cached the resolved OID, and is | |
655 | * marked at such. When written to the packfile, it'll be | |
656 | * accompanied by this resolved oid | |
657 | */ | |
658 | } | |
87d3acf4 | 659 | |
45e79e37 | 660 | git_object_free(object); |
1a481123 | 661 | return 0; |
2f8a8ab2 | 662 | } |
9282e921 | 663 | |
87d3acf4 VM |
664 | /* |
665 | * Remove all loose references | |
666 | * | |
667 | * Once we have successfully written a packfile, | |
668 | * all the loose references that were packed must be | |
669 | * removed from disk. | |
670 | * | |
671 | * This is a dangerous method; make sure the packfile | |
672 | * is well-written, because we are destructing references | |
673 | * here otherwise. | |
674 | */ | |
675 | static int packed_remove_loose(git_repository *repo, git_vector *packing_list) | |
2f8a8ab2 | 676 | { |
87d3acf4 | 677 | unsigned int i; |
97769280 | 678 | git_buf full_path = GIT_BUF_INIT; |
1a481123 | 679 | int failed = 0; |
87d3acf4 VM |
680 | |
681 | for (i = 0; i < packing_list->length; ++i) { | |
d4a0b124 | 682 | struct packref *ref = git_vector_get(packing_list, i); |
8f90ced5 | 683 | |
d4a0b124 | 684 | if ((ref->flags & GIT_PACKREF_WAS_LOOSE) == 0) |
8f90ced5 | 685 | continue; |
686 | ||
1a481123 VM |
687 | if (git_buf_joinpath(&full_path, repo->path_repository, ref->name) < 0) |
688 | return -1; /* critical; do not try to recover on oom */ | |
97769280 | 689 | |
1a481123 VM |
690 | if (git_path_exists(full_path.ptr) == true && p_unlink(full_path.ptr) < 0) { |
691 | if (failed) | |
692 | continue; | |
87d3acf4 | 693 | |
1a481123 VM |
694 | giterr_set(GITERR_REFERENCE, |
695 | "Failed to remove loose reference '%s' after packing: %s", | |
696 | full_path.ptr, strerror(errno)); | |
697 | ||
698 | failed = 1; | |
699 | } | |
87d3acf4 VM |
700 | |
701 | /* | |
702 | * if we fail to remove a single file, this is *not* good, | |
703 | * but we should keep going and remove as many as possible. | |
704 | * After we've removed as many files as possible, we return | |
705 | * the error code anyway. | |
87d3acf4 VM |
706 | */ |
707 | } | |
708 | ||
97769280 | 709 | git_buf_free(&full_path); |
1a481123 | 710 | return failed ? -1 : 0; |
2f8a8ab2 | 711 | } |
9282e921 | 712 | |
87d3acf4 | 713 | static int packed_sort(const void *a, const void *b) |
2f8a8ab2 | 714 | { |
d4a0b124 VM |
715 | const struct packref *ref_a = (const struct packref *)a; |
716 | const struct packref *ref_b = (const struct packref *)b; | |
87d3acf4 VM |
717 | |
718 | return strcmp(ref_a->name, ref_b->name); | |
2f8a8ab2 VM |
719 | } |
720 | ||
87d3acf4 VM |
721 | /* |
722 | * Write all the contents in the in-memory packfile to disk. | |
723 | */ | |
724 | static int packed_write(git_repository *repo) | |
2f8a8ab2 | 725 | { |
b762e576 | 726 | git_filebuf pack_file = GIT_FILEBUF_INIT; |
87d3acf4 | 727 | unsigned int i; |
97769280 | 728 | git_buf pack_file_path = GIT_BUF_INIT; |
87d3acf4 | 729 | git_vector packing_list; |
44ef8b1b | 730 | unsigned int total_refs; |
2f8a8ab2 | 731 | |
87d3acf4 | 732 | assert(repo && repo->references.packfile); |
9282e921 | 733 | |
01fed0a8 | 734 | total_refs = |
c2b67043 | 735 | (unsigned int)git_strmap_num_entries(repo->references.packfile); |
1a481123 VM |
736 | |
737 | if (git_vector_init(&packing_list, total_refs, packed_sort) < 0) | |
738 | return -1; | |
9282e921 | 739 | |
87d3acf4 VM |
740 | /* Load all the packfile into a vector */ |
741 | { | |
d4a0b124 | 742 | struct packref *reference; |
87d3acf4 | 743 | |
01fed0a8 | 744 | /* cannot fail: vector already has the right size */ |
c2b67043 | 745 | git_strmap_foreach_value(repo->references.packfile, reference, { |
d4a0b124 | 746 | git_vector_insert(&packing_list, reference); |
01fed0a8 | 747 | }); |
9282e921 | 748 | } |
749 | ||
87d3acf4 VM |
750 | /* sort the vector so the entries appear sorted on the packfile */ |
751 | git_vector_sort(&packing_list); | |
9282e921 | 752 | |
87d3acf4 | 753 | /* Now we can open the file! */ |
1a481123 VM |
754 | if (git_buf_joinpath(&pack_file_path, repo->path_repository, GIT_PACKEDREFS_FILE) < 0) |
755 | goto cleanup_memory; | |
97769280 | 756 | |
1a481123 VM |
757 | if (git_filebuf_open(&pack_file, pack_file_path.ptr, 0) < 0) |
758 | goto cleanup_packfile; | |
9282e921 | 759 | |
7c8a7b91 VM |
760 | /* Packfiles have a header... apparently |
761 | * This is in fact not required, but we might as well print it | |
762 | * just for kicks */ | |
1a481123 VM |
763 | if (git_filebuf_printf(&pack_file, "%s\n", GIT_PACKEDREFS_HEADER) < 0) |
764 | goto cleanup_packfile; | |
2f8a8ab2 | 765 | |
87d3acf4 | 766 | for (i = 0; i < packing_list.length; ++i) { |
d4a0b124 | 767 | struct packref *ref = (struct packref *)git_vector_get(&packing_list, i); |
2f8a8ab2 | 768 | |
1a481123 VM |
769 | if (packed_find_peel(repo, ref) < 0) |
770 | goto cleanup_packfile; | |
2b397327 | 771 | |
1a481123 VM |
772 | if (packed_write_ref(ref, &pack_file) < 0) |
773 | goto cleanup_packfile; | |
87d3acf4 | 774 | } |
2f8a8ab2 | 775 | |
87d3acf4 VM |
776 | /* if we've written all the references properly, we can commit |
777 | * the packfile to make the changes effective */ | |
1a481123 VM |
778 | if (git_filebuf_commit(&pack_file, GIT_PACKEDREFS_FILE_MODE) < 0) |
779 | goto cleanup_memory; | |
7341bf87 | 780 | |
1a481123 VM |
781 | /* when and only when the packfile has been properly written, |
782 | * we can go ahead and remove the loose refs */ | |
783 | if (packed_remove_loose(repo, &packing_list) < 0) | |
784 | goto cleanup_memory; | |
7341bf87 | 785 | |
1a481123 VM |
786 | { |
787 | struct stat st; | |
788 | if (p_stat(pack_file_path.ptr, &st) == 0) | |
789 | repo->references.packfile_time = st.st_mtime; | |
790 | } | |
9282e921 | 791 | |
87d3acf4 | 792 | git_vector_free(&packing_list); |
97769280 | 793 | git_buf_free(&pack_file_path); |
1d8cc731 | 794 | |
1a481123 VM |
795 | /* we're good now */ |
796 | return 0; | |
797 | ||
798 | cleanup_packfile: | |
799 | git_filebuf_cleanup(&pack_file); | |
97769280 | 800 | |
1a481123 VM |
801 | cleanup_memory: |
802 | git_vector_free(&packing_list); | |
803 | git_buf_free(&pack_file_path); | |
804 | ||
805 | return -1; | |
87d3acf4 | 806 | } |
2f8a8ab2 | 807 | |
45d387ac VM |
808 | struct reference_available_t { |
809 | const char *new_ref; | |
810 | const char *old_ref; | |
811 | int available; | |
812 | }; | |
813 | ||
1b6d8163 MS |
814 | static int _reference_available_cb(const char *ref, void *data) |
815 | { | |
45d387ac | 816 | struct reference_available_t *d; |
f120e92b | 817 | |
1b6d8163 | 818 | assert(ref && data); |
1a481123 | 819 | d = (struct reference_available_t *)data; |
1b6d8163 | 820 | |
45d387ac | 821 | if (!d->old_ref || strcmp(d->old_ref, ref)) { |
44ef8b1b RB |
822 | size_t reflen = strlen(ref); |
823 | size_t newlen = strlen(d->new_ref); | |
824 | size_t cmplen = reflen < newlen ? reflen : newlen; | |
45d387ac | 825 | const char *lead = reflen < newlen ? d->new_ref : ref; |
1b6d8163 | 826 | |
45d387ac VM |
827 | if (!strncmp(d->new_ref, ref, cmplen) && lead[cmplen] == '/') { |
828 | d->available = 0; | |
829 | return -1; | |
830 | } | |
1b6d8163 MS |
831 | } |
832 | ||
45d387ac | 833 | return 0; |
1b6d8163 MS |
834 | } |
835 | ||
1a481123 | 836 | static int reference_path_available( |
d4a0b124 VM |
837 | git_repository *repo, |
838 | const char *ref, | |
1a481123 | 839 | const char* old_ref) |
1b6d8163 | 840 | { |
5dca2010 | 841 | int error; |
45d387ac | 842 | struct reference_available_t data; |
1b6d8163 | 843 | |
45d387ac VM |
844 | data.new_ref = ref; |
845 | data.old_ref = old_ref; | |
846 | data.available = 1; | |
1b6d8163 | 847 | |
5dca2010 RB |
848 | error = git_reference_foreach( |
849 | repo, GIT_REF_LISTALL, _reference_available_cb, (void *)&data); | |
850 | if (error < 0) | |
851 | return error; | |
1a481123 VM |
852 | |
853 | if (!data.available) { | |
854 | giterr_set(GITERR_REFERENCE, | |
e1de726c | 855 | "The path to reference '%s' collides with an existing one", ref); |
45d387ac | 856 | return -1; |
1a481123 | 857 | } |
1b6d8163 | 858 | |
45d387ac | 859 | return 0; |
1b6d8163 MS |
860 | } |
861 | ||
d4a0b124 | 862 | static int reference_exists(int *exists, git_repository *repo, const char *ref_name) |
2f8a8ab2 | 863 | { |
97769280 | 864 | git_buf ref_path = GIT_BUF_INIT; |
2f8a8ab2 | 865 | |
1a481123 VM |
866 | if (packed_load(repo) < 0) |
867 | return -1; | |
2f8a8ab2 | 868 | |
1a481123 VM |
869 | if (git_buf_joinpath(&ref_path, repo->path_repository, ref_name) < 0) |
870 | return -1; | |
2f8a8ab2 | 871 | |
1a481123 | 872 | if (git_path_isfile(ref_path.ptr) == true || |
c2b67043 | 873 | git_strmap_exists(repo->references.packfile, ref_path.ptr)) |
01fed0a8 | 874 | { |
d4a0b124 VM |
875 | *exists = 1; |
876 | } else { | |
877 | *exists = 0; | |
878 | } | |
2f8a8ab2 | 879 | |
97769280 | 880 | git_buf_free(&ref_path); |
1a481123 VM |
881 | return 0; |
882 | } | |
97769280 | 883 | |
1a481123 VM |
884 | /* |
885 | * Check if a reference could be written to disk, based on: | |
886 | * | |
887 | * - Whether a reference with the same name already exists, | |
888 | * and we are allowing or disallowing overwrites | |
889 | * | |
890 | * - Whether the name of the reference would collide with | |
891 | * an existing path | |
892 | */ | |
893 | static int reference_can_write( | |
894 | git_repository *repo, | |
895 | const char *refname, | |
896 | const char *previous_name, | |
897 | int force) | |
898 | { | |
899 | /* see if the reference shares a path with an existing reference; | |
900 | * if a path is shared, we cannot create the reference, even when forcing */ | |
901 | if (reference_path_available(repo, refname, previous_name) < 0) | |
902 | return -1; | |
903 | ||
904 | /* check if the reference actually exists, but only if we are not forcing | |
905 | * the rename. If we are forcing, it's OK to overwrite */ | |
906 | if (!force) { | |
907 | int exists; | |
908 | ||
909 | if (reference_exists(&exists, repo, refname) < 0) | |
910 | return -1; | |
911 | ||
912 | /* We cannot proceed if the reference already exists and we're not forcing | |
913 | * the rename; the existing one would be overwritten */ | |
914 | if (exists) { | |
915 | giterr_set(GITERR_REFERENCE, | |
e1de726c | 916 | "A reference with that name (%s) already exists", refname); |
904b67e6 | 917 | return GIT_EEXISTS; |
1a481123 VM |
918 | } |
919 | } | |
920 | ||
921 | /* FIXME: if the reference exists and we are forcing, do we really need to | |
922 | * remove the reference first? | |
923 | * | |
924 | * Two cases: | |
925 | * | |
926 | * - the reference already exists and is loose: not a problem, the file | |
927 | * gets overwritten on disk | |
928 | * | |
929 | * - the reference already exists and is packed: we write a new one as | |
930 | * loose, which by all means renders the packed one useless | |
931 | */ | |
932 | ||
933 | return 0; | |
d4a0b124 | 934 | } |
2f8a8ab2 | 935 | |
1a481123 | 936 | |
d4a0b124 VM |
937 | static int packed_lookup(git_reference *ref) |
938 | { | |
d4a0b124 | 939 | struct packref *pack_ref = NULL; |
c2b67043 | 940 | git_strmap *packfile_refs; |
01fed0a8 | 941 | khiter_t pos; |
9282e921 | 942 | |
1a481123 VM |
943 | if (packed_load(ref->owner) < 0) |
944 | return -1; | |
9282e921 | 945 | |
1a481123 VM |
946 | /* maybe the packfile hasn't changed at all, so we don't |
947 | * have to re-lookup the reference */ | |
948 | if ((ref->flags & GIT_REF_PACKED) && | |
d4a0b124 | 949 | ref->mtime == ref->owner->references.packfile_time) |
1a481123 | 950 | return 0; |
86194b24 | 951 | |
fa515656 | 952 | if (ref->flags & GIT_REF_SYMBOLIC) { |
854eccbb | 953 | git__free(ref->target.symbolic); |
fa515656 VM |
954 | ref->target.symbolic = NULL; |
955 | } | |
d4a0b124 VM |
956 | |
957 | /* Look up on the packfile */ | |
01fed0a8 | 958 | packfile_refs = ref->owner->references.packfile; |
c2b67043 RB |
959 | pos = git_strmap_lookup_index(packfile_refs, ref->name); |
960 | if (!git_strmap_valid_index(packfile_refs, pos)) { | |
1a481123 | 961 | giterr_set(GITERR_REFERENCE, "Reference '%s' not found", ref->name); |
904b67e6 | 962 | return GIT_ENOTFOUND; |
1a481123 | 963 | } |
d4a0b124 | 964 | |
c2b67043 | 965 | pack_ref = git_strmap_value_at(packfile_refs, pos); |
01fed0a8 | 966 | |
d4a0b124 VM |
967 | ref->flags = GIT_REF_OID | GIT_REF_PACKED; |
968 | ref->mtime = ref->owner->references.packfile_time; | |
969 | git_oid_cpy(&ref->target.oid, &pack_ref->oid); | |
970 | ||
1a481123 | 971 | return 0; |
2f8a8ab2 | 972 | } |
9282e921 | 973 | |
1a481123 | 974 | static int reference_lookup(git_reference *ref) |
a46ec457 | 975 | { |
45d387ac | 976 | int result; |
a46ec457 | 977 | |
1a481123 VM |
978 | result = loose_lookup(ref); |
979 | if (result == 0) | |
980 | return 0; | |
a46ec457 | 981 | |
1a481123 VM |
982 | /* only try to lookup this reference on the packfile if it |
983 | * wasn't found on the loose refs; not if there was a critical error */ | |
904b67e6 | 984 | if (result == GIT_ENOTFOUND) { |
1a481123 VM |
985 | giterr_clear(); |
986 | result = packed_lookup(ref); | |
987 | if (result == 0) | |
988 | return 0; | |
989 | } | |
a46ec457 | 990 | |
1a481123 | 991 | /* unexpected error; free the reference */ |
d4a0b124 | 992 | git_reference_free(ref); |
1a481123 | 993 | return result; |
a46ec457 MS |
994 | } |
995 | ||
d4a0b124 VM |
996 | /* |
997 | * Delete a reference. | |
998 | * This is an internal method; the reference is removed | |
999 | * from disk or the packfile, but the pointer is not freed | |
87d3acf4 | 1000 | */ |
1a481123 | 1001 | static int reference_delete(git_reference *ref) |
87d3acf4 | 1002 | { |
45d387ac | 1003 | int result; |
d4a0b124 | 1004 | |
87d3acf4 VM |
1005 | assert(ref); |
1006 | ||
d4a0b124 VM |
1007 | /* If the reference is packed, this is an expensive operation. |
1008 | * We need to reload the packfile, remove the reference from the | |
1009 | * packing list, and repack */ | |
1010 | if (ref->flags & GIT_REF_PACKED) { | |
c2b67043 | 1011 | git_strmap *packfile_refs; |
20c50b9e | 1012 | struct packref *packref; |
01fed0a8 RB |
1013 | khiter_t pos; |
1014 | ||
d4a0b124 | 1015 | /* load the existing packfile */ |
1a481123 | 1016 | if (packed_load(ref->owner) < 0) |
45d387ac | 1017 | return -1; |
87d3acf4 | 1018 | |
01fed0a8 | 1019 | packfile_refs = ref->owner->references.packfile; |
c2b67043 RB |
1020 | pos = git_strmap_lookup_index(packfile_refs, ref->name); |
1021 | if (!git_strmap_valid_index(packfile_refs, pos)) { | |
1a481123 | 1022 | giterr_set(GITERR_REFERENCE, |
45d387ac VM |
1023 | "Reference %s stopped existing in the packfile", ref->name); |
1024 | return -1; | |
1025 | } | |
87d3acf4 | 1026 | |
c2b67043 RB |
1027 | packref = git_strmap_value_at(packfile_refs, pos); |
1028 | git_strmap_delete_at(packfile_refs, pos); | |
01fed0a8 | 1029 | |
45d387ac | 1030 | git__free(packref); |
1a481123 | 1031 | if (packed_write(ref->owner) < 0) |
45d387ac | 1032 | return -1; |
87d3acf4 | 1033 | |
d4a0b124 VM |
1034 | /* If the reference is loose, we can just remove the reference |
1035 | * from the filesystem */ | |
1036 | } else { | |
d4a0b124 | 1037 | git_reference *ref_in_pack; |
97769280 | 1038 | git_buf full_path = GIT_BUF_INIT; |
a46ec457 | 1039 | |
1a481123 | 1040 | if (git_buf_joinpath(&full_path, ref->owner->path_repository, ref->name) < 0) |
45d387ac | 1041 | return -1; |
a46ec457 | 1042 | |
45d387ac | 1043 | result = p_unlink(full_path.ptr); |
97769280 | 1044 | git_buf_free(&full_path); /* done with path at this point */ |
45d387ac VM |
1045 | |
1046 | if (result < 0) { | |
ae9e29fd | 1047 | giterr_set(GITERR_OS, "Failed to unlink '%s'", full_path.ptr); |
45d387ac VM |
1048 | return -1; |
1049 | } | |
a46ec457 | 1050 | |
d4a0b124 VM |
1051 | /* When deleting a loose reference, we have to ensure that an older |
1052 | * packed version of it doesn't exist */ | |
1a481123 | 1053 | if (git_reference_lookup(&ref_in_pack, ref->owner, ref->name) == 0) { |
d4a0b124 | 1054 | assert((ref_in_pack->flags & GIT_REF_PACKED) != 0); |
1a481123 | 1055 | return git_reference_delete(ref_in_pack); |
d4a0b124 | 1056 | } |
1a481123 VM |
1057 | |
1058 | giterr_clear(); | |
d4a0b124 VM |
1059 | } |
1060 | ||
45d387ac | 1061 | return 0; |
a46ec457 MS |
1062 | } |
1063 | ||
1a481123 | 1064 | int git_reference_delete(git_reference *ref) |
a46ec457 | 1065 | { |
1a481123 | 1066 | int result = reference_delete(ref); |
d4a0b124 | 1067 | git_reference_free(ref); |
45d387ac | 1068 | return result; |
a46ec457 MS |
1069 | } |
1070 | ||
d4a0b124 | 1071 | int git_reference_lookup(git_reference **ref_out, |
1a481123 | 1072 | git_repository *repo, const char *name) |
a46ec457 | 1073 | { |
f201d613 RB |
1074 | return git_reference_lookup_resolved(ref_out, repo, name, 0); |
1075 | } | |
1076 | ||
26515e73 | 1077 | int git_reference_name_to_oid( |
f201d613 RB |
1078 | git_oid *out, git_repository *repo, const char *name) |
1079 | { | |
1080 | int error; | |
1081 | git_reference *ref; | |
1082 | ||
1083 | if ((error = git_reference_lookup_resolved(&ref, repo, name, -1)) < 0) | |
1084 | return error; | |
1085 | ||
1086 | git_oid_cpy(out, git_reference_oid(ref)); | |
1087 | git_reference_free(ref); | |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | int git_reference_lookup_resolved( | |
1092 | git_reference **ref_out, | |
1093 | git_repository *repo, | |
1094 | const char *name, | |
1095 | int max_nesting) | |
1096 | { | |
1097 | git_reference *scan; | |
1098 | int result, nesting; | |
d4a0b124 VM |
1099 | |
1100 | assert(ref_out && repo && name); | |
f201d613 | 1101 | |
1a481123 | 1102 | *ref_out = NULL; |
d4a0b124 | 1103 | |
f201d613 RB |
1104 | if (max_nesting > MAX_NESTING_LEVEL) |
1105 | max_nesting = MAX_NESTING_LEVEL; | |
1106 | else if (max_nesting < 0) | |
1107 | max_nesting = DEFAULT_NESTING_LEVEL; | |
a46ec457 | 1108 | |
f201d613 RB |
1109 | scan = git__calloc(1, sizeof(git_reference)); |
1110 | GITERR_CHECK_ALLOC(scan); | |
d4a0b124 | 1111 | |
f201d613 RB |
1112 | scan->name = git__calloc(GIT_REFNAME_MAX + 1, sizeof(char)); |
1113 | GITERR_CHECK_ALLOC(scan->name); | |
1a481123 | 1114 | |
c030ada7 | 1115 | if ((result = git_reference__normalize_name_lax( |
2e0c8816 | 1116 | scan->name, |
1117 | GIT_REFNAME_MAX, | |
1118 | name)) < 0) { | |
1119 | git_reference_free(scan); | |
1120 | return result; | |
f201d613 RB |
1121 | } |
1122 | ||
1123 | scan->target.symbolic = git__strdup(scan->name); | |
1124 | GITERR_CHECK_ALLOC(scan->target.symbolic); | |
1125 | ||
1126 | scan->owner = repo; | |
1127 | scan->flags = GIT_REF_SYMBOLIC; | |
1128 | ||
1129 | for (nesting = max_nesting; | |
1130 | nesting >= 0 && (scan->flags & GIT_REF_SYMBOLIC) != 0; | |
1131 | nesting--) | |
1132 | { | |
1133 | if (nesting != max_nesting) | |
1134 | strncpy(scan->name, scan->target.symbolic, GIT_REFNAME_MAX); | |
1135 | ||
1136 | scan->mtime = 0; | |
1137 | ||
1138 | if ((result = reference_lookup(scan)) < 0) | |
1139 | return result; /* lookup git_reference_free on scan already */ | |
1140 | } | |
1141 | ||
1142 | if ((scan->flags & GIT_REF_OID) == 0 && max_nesting != 0) { | |
1143 | giterr_set(GITERR_REFERENCE, | |
1144 | "Cannot resolve reference (>%u levels deep)", max_nesting); | |
1145 | git_reference_free(scan); | |
1146 | return -1; | |
1147 | } | |
1148 | ||
1149 | *ref_out = scan; | |
1150 | return 0; | |
a46ec457 MS |
1151 | } |
1152 | ||
d4a0b124 VM |
1153 | /** |
1154 | * Getters | |
1155 | */ | |
2e2e9785 | 1156 | git_ref_t git_reference_type(git_reference *ref) |
87d3acf4 VM |
1157 | { |
1158 | assert(ref); | |
d4a0b124 VM |
1159 | |
1160 | if (ref->flags & GIT_REF_OID) | |
1161 | return GIT_REF_OID; | |
1162 | ||
1163 | if (ref->flags & GIT_REF_SYMBOLIC) | |
1164 | return GIT_REF_SYMBOLIC; | |
1165 | ||
1166 | return GIT_REF_INVALID; | |
87d3acf4 VM |
1167 | } |
1168 | ||
d4a0b124 | 1169 | int git_reference_is_packed(git_reference *ref) |
87d3acf4 VM |
1170 | { |
1171 | assert(ref); | |
d4a0b124 | 1172 | return !!(ref->flags & GIT_REF_PACKED); |
87d3acf4 VM |
1173 | } |
1174 | ||
d4a0b124 | 1175 | const char *git_reference_name(git_reference *ref) |
87d3acf4 VM |
1176 | { |
1177 | assert(ref); | |
d4a0b124 | 1178 | return ref->name; |
87d3acf4 VM |
1179 | } |
1180 | ||
d4a0b124 | 1181 | git_repository *git_reference_owner(git_reference *ref) |
a46ec457 | 1182 | { |
d4a0b124 VM |
1183 | assert(ref); |
1184 | return ref->owner; | |
a46ec457 MS |
1185 | } |
1186 | ||
d4a0b124 | 1187 | const git_oid *git_reference_oid(git_reference *ref) |
87d3acf4 VM |
1188 | { |
1189 | assert(ref); | |
1190 | ||
d4a0b124 | 1191 | if ((ref->flags & GIT_REF_OID) == 0) |
87d3acf4 VM |
1192 | return NULL; |
1193 | ||
d4a0b124 | 1194 | return &ref->target.oid; |
87d3acf4 VM |
1195 | } |
1196 | ||
d4a0b124 | 1197 | const char *git_reference_target(git_reference *ref) |
a46ec457 | 1198 | { |
d4a0b124 | 1199 | assert(ref); |
a46ec457 | 1200 | |
d4a0b124 | 1201 | if ((ref->flags & GIT_REF_SYMBOLIC) == 0) |
a46ec457 MS |
1202 | return NULL; |
1203 | ||
d4a0b124 | 1204 | return ref->target.symbolic; |
a46ec457 MS |
1205 | } |
1206 | ||
d4a0b124 VM |
1207 | int git_reference_create_symbolic( |
1208 | git_reference **ref_out, | |
1209 | git_repository *repo, | |
1210 | const char *name, | |
1211 | const char *target, | |
1a481123 | 1212 | int force) |
d5afc039 VM |
1213 | { |
1214 | char normalized[GIT_REFNAME_MAX]; | |
d4a0b124 | 1215 | git_reference *ref = NULL; |
c1281493 | 1216 | int error; |
d5afc039 | 1217 | |
c030ada7 | 1218 | if (git_reference__normalize_name_lax( |
2e0c8816 | 1219 | normalized, |
1220 | sizeof(normalized), | |
1221 | name) < 0) | |
1222 | return -1; | |
d5afc039 | 1223 | |
c1281493 CMN |
1224 | if ((error = reference_can_write(repo, normalized, NULL, force)) < 0) |
1225 | return error; | |
d5afc039 | 1226 | |
1a481123 | 1227 | if (reference_alloc(&ref, repo, normalized) < 0) |
45d387ac | 1228 | return -1; |
d5afc039 | 1229 | |
d4a0b124 VM |
1230 | ref->flags |= GIT_REF_SYMBOLIC; |
1231 | ||
1232 | /* set the target; this will normalize the name automatically | |
1233 | * and write the reference on disk */ | |
1a481123 | 1234 | if (git_reference_set_target(ref, target) < 0) { |
45d387ac VM |
1235 | git_reference_free(ref); |
1236 | return -1; | |
1237 | } | |
d4a0b124 VM |
1238 | if (ref_out == NULL) { |
1239 | git_reference_free(ref); | |
1240 | } else { | |
1241 | *ref_out = ref; | |
d5afc039 VM |
1242 | } |
1243 | ||
45d387ac | 1244 | return 0; |
d5afc039 VM |
1245 | } |
1246 | ||
d4a0b124 VM |
1247 | int git_reference_create_oid( |
1248 | git_reference **ref_out, | |
1249 | git_repository *repo, | |
1250 | const char *name, | |
1251 | const git_oid *id, | |
1a481123 | 1252 | int force) |
a46ec457 | 1253 | { |
c1281493 | 1254 | int error; |
d4a0b124 VM |
1255 | git_reference *ref = NULL; |
1256 | char normalized[GIT_REFNAME_MAX]; | |
a46ec457 | 1257 | |
77e06d7e | 1258 | if (git_reference__normalize_name_lax( |
2e0c8816 | 1259 | normalized, |
1260 | sizeof(normalized), | |
1261 | name) < 0) | |
1262 | return -1; | |
d5afc039 | 1263 | |
c1281493 CMN |
1264 | if ((error = reference_can_write(repo, normalized, NULL, force)) < 0) |
1265 | return error; | |
d5afc039 | 1266 | |
1a481123 | 1267 | if (reference_alloc(&ref, repo, name) < 0) |
45d387ac | 1268 | return -1; |
d4a0b124 VM |
1269 | |
1270 | ref->flags |= GIT_REF_OID; | |
d5afc039 VM |
1271 | |
1272 | /* set the oid; this will write the reference on disk */ | |
1a481123 | 1273 | if (git_reference_set_oid(ref, id) < 0) { |
45d387ac VM |
1274 | git_reference_free(ref); |
1275 | return -1; | |
1276 | } | |
d5afc039 | 1277 | |
d4a0b124 VM |
1278 | if (ref_out == NULL) { |
1279 | git_reference_free(ref); | |
1280 | } else { | |
1281 | *ref_out = ref; | |
d5afc039 VM |
1282 | } |
1283 | ||
45d387ac | 1284 | return 0; |
a46ec457 | 1285 | } |
87d3acf4 VM |
1286 | /* |
1287 | * Change the OID target of a reference. | |
1288 | * | |
d4a0b124 VM |
1289 | * For both loose and packed references, just change |
1290 | * the oid in memory and (over)write the file in disk. | |
87d3acf4 | 1291 | * |
d4a0b124 VM |
1292 | * We do not repack packed references because of performance |
1293 | * reasons. | |
87d3acf4 | 1294 | */ |
1a481123 | 1295 | int git_reference_set_oid(git_reference *ref, const git_oid *id) |
87d3acf4 | 1296 | { |
9462c471 | 1297 | git_odb *odb = NULL; |
87d3acf4 | 1298 | |
45d387ac | 1299 | if ((ref->flags & GIT_REF_OID) == 0) { |
1a481123 | 1300 | giterr_set(GITERR_REFERENCE, "Cannot set OID on symbolic reference"); |
45d387ac VM |
1301 | return -1; |
1302 | } | |
87d3acf4 | 1303 | |
9a53df7e VM |
1304 | assert(ref->owner); |
1305 | ||
1a481123 | 1306 | if (git_repository_odb__weakptr(&odb, ref->owner) < 0) |
45d387ac | 1307 | return -1; |
9462c471 | 1308 | |
9a53df7e VM |
1309 | /* Don't let the user create references to OIDs that |
1310 | * don't exist in the ODB */ | |
45d387ac | 1311 | if (!git_odb_exists(odb, id)) { |
1a481123 | 1312 | giterr_set(GITERR_REFERENCE, |
45d387ac VM |
1313 | "Target OID for the reference doesn't exist on the repository"); |
1314 | return -1; | |
1315 | } | |
87d3acf4 | 1316 | |
d4a0b124 VM |
1317 | /* Update the OID value on `ref` */ |
1318 | git_oid_cpy(&ref->target.oid, id); | |
87d3acf4 | 1319 | |
9462c471 | 1320 | /* Write back to disk */ |
1a481123 | 1321 | return loose_write(ref); |
a46ec457 MS |
1322 | } |
1323 | ||
87d3acf4 VM |
1324 | /* |
1325 | * Change the target of a symbolic reference. | |
1326 | * | |
1327 | * This is easy because symrefs cannot be inside | |
1328 | * a pack. We just change the target in memory | |
1329 | * and overwrite the file on disk. | |
1330 | */ | |
1a481123 | 1331 | int git_reference_set_target(git_reference *ref, const char *target) |
87d3acf4 | 1332 | { |
d4a0b124 | 1333 | char normalized[GIT_REFNAME_MAX]; |
87d3acf4 | 1334 | |
45d387ac | 1335 | if ((ref->flags & GIT_REF_SYMBOLIC) == 0) { |
1a481123 | 1336 | giterr_set(GITERR_REFERENCE, |
45d387ac VM |
1337 | "Cannot set symbolic target on a direct reference"); |
1338 | return -1; | |
1339 | } | |
87d3acf4 | 1340 | |
c030ada7 | 1341 | if (git_reference__normalize_name_lax( |
2e0c8816 | 1342 | normalized, |
1343 | sizeof(normalized), | |
1344 | target)) | |
1345 | return -1; | |
87d3acf4 | 1346 | |
d4a0b124 VM |
1347 | git__free(ref->target.symbolic); |
1348 | ref->target.symbolic = git__strdup(normalized); | |
1a481123 | 1349 | GITERR_CHECK_ALLOC(ref->target.symbolic); |
87d3acf4 | 1350 | |
1a481123 | 1351 | return loose_write(ref); |
87d3acf4 VM |
1352 | } |
1353 | ||
1a481123 | 1354 | int git_reference_rename(git_reference *ref, const char *new_name, int force) |
7376ad99 | 1355 | { |
1a481123 | 1356 | int result; |
2e0c8816 | 1357 | unsigned int normalization_flags; |
97769280 | 1358 | git_buf aux_path = GIT_BUF_INIT; |
0ffcf78a | 1359 | char normalized[GIT_REFNAME_MAX]; |
f3cc7834 | 1360 | bool should_head_be_updated = false; |
858dba58 | 1361 | |
2e0c8816 | 1362 | normalization_flags = ref->flags & GIT_REF_SYMBOLIC ? |
1363 | GIT_REF_FORMAT_ALLOW_ONELEVEL | |
1364 | : GIT_REF_FORMAT_NORMAL; | |
1365 | ||
1366 | if (git_reference_normalize_name( | |
1367 | normalized, | |
1368 | sizeof(normalized), | |
1369 | new_name, | |
1370 | normalization_flags) < 0) | |
1371 | return -1; | |
7376ad99 | 1372 | |
3548fcf5 | 1373 | if ((result = reference_can_write(ref->owner, normalized, ref->name, force)) < 0) |
1374 | return result; | |
ca6f203c | 1375 | |
97769280 | 1376 | /* Initialize path now so we won't get an allocation failure once |
1a481123 VM |
1377 | * we actually start removing things. */ |
1378 | if (git_buf_joinpath(&aux_path, ref->owner->path_repository, new_name) < 0) | |
45d387ac | 1379 | return -1; |
97769280 | 1380 | |
f3cc7834 | 1381 | /* |
1382 | * Check if we have to update HEAD. | |
1383 | */ | |
4ba23be1 | 1384 | if ((should_head_be_updated = git_branch_is_head(ref)) < 0) |
f3cc7834 | 1385 | goto cleanup; |
1386 | ||
0ffcf78a MS |
1387 | /* |
1388 | * Now delete the old ref and remove an possibly existing directory | |
d4a0b124 VM |
1389 | * named `new_name`. Note that using the internal `reference_delete` |
1390 | * method deletes the ref from disk but doesn't free the pointer, so | |
1391 | * we can still access the ref's attributes for creating the new one | |
0ffcf78a | 1392 | */ |
1a481123 | 1393 | if (reference_delete(ref) < 0) |
549bbd13 | 1394 | goto cleanup; |
7376ad99 | 1395 | |
0ffcf78a MS |
1396 | /* |
1397 | * Finally we can create the new reference. | |
1398 | */ | |
d4a0b124 | 1399 | if (ref->flags & GIT_REF_SYMBOLIC) { |
45d387ac | 1400 | result = git_reference_create_symbolic( |
1a481123 | 1401 | NULL, ref->owner, new_name, ref->target.symbolic, force); |
0ffcf78a | 1402 | } else { |
45d387ac | 1403 | result = git_reference_create_oid( |
1a481123 | 1404 | NULL, ref->owner, new_name, &ref->target.oid, force); |
0ffcf78a | 1405 | } |
7376ad99 | 1406 | |
45d387ac | 1407 | if (result < 0) |
64093ce5 | 1408 | goto rollback; |
7376ad99 | 1409 | |
0ffcf78a | 1410 | /* |
f3cc7834 | 1411 | * Update HEAD it was poiting to the reference being renamed. |
0ffcf78a | 1412 | */ |
f3cc7834 | 1413 | if (should_head_be_updated && |
1414 | git_repository_set_head(ref->owner, new_name) < 0) { | |
1a481123 | 1415 | giterr_set(GITERR_REFERENCE, |
45d387ac | 1416 | "Failed to update HEAD after renaming reference"); |
d4a0b124 VM |
1417 | goto cleanup; |
1418 | } | |
1419 | ||
a5cd086d | 1420 | /* |
33c33707 | 1421 | * Rename the reflog file, if it exists. |
a5cd086d | 1422 | */ |
33c33707 | 1423 | if ((git_reference_has_log(ref)) && (git_reflog_rename(ref, new_name) < 0)) |
97769280 RB |
1424 | goto cleanup; |
1425 | ||
d4a0b124 VM |
1426 | /* |
1427 | * Change the name of the reference given by the user. | |
1428 | */ | |
1429 | git__free(ref->name); | |
1430 | ref->name = git__strdup(new_name); | |
1431 | ||
1432 | /* The reference is no longer packed */ | |
1433 | ref->flags &= ~GIT_REF_PACKED; | |
7376ad99 | 1434 | |
45d387ac VM |
1435 | git_buf_free(&aux_path); |
1436 | return 0; | |
1437 | ||
0ffcf78a | 1438 | cleanup: |
97769280 | 1439 | git_buf_free(&aux_path); |
45d387ac | 1440 | return -1; |
7376ad99 | 1441 | |
0ffcf78a MS |
1442 | rollback: |
1443 | /* | |
45d387ac | 1444 | * Try to create the old reference again, ignore failures |
0ffcf78a | 1445 | */ |
d4a0b124 | 1446 | if (ref->flags & GIT_REF_SYMBOLIC) |
45d387ac | 1447 | git_reference_create_symbolic( |
1a481123 | 1448 | NULL, ref->owner, ref->name, ref->target.symbolic, 0); |
0ffcf78a | 1449 | else |
45d387ac | 1450 | git_reference_create_oid( |
1a481123 | 1451 | NULL, ref->owner, ref->name, &ref->target.oid, 0); |
0ffcf78a | 1452 | |
64093ce5 MS |
1453 | /* The reference is no longer packed */ |
1454 | ref->flags &= ~GIT_REF_PACKED; | |
1455 | ||
97769280 | 1456 | git_buf_free(&aux_path); |
45d387ac | 1457 | return -1; |
0ffcf78a | 1458 | } |
7376ad99 | 1459 | |
1a481123 | 1460 | int git_reference_resolve(git_reference **ref_out, git_reference *ref) |
87d3acf4 | 1461 | { |
d4a0b124 | 1462 | if (ref->flags & GIT_REF_OID) |
1a481123 | 1463 | return git_reference_lookup(ref_out, ref->owner, ref->name); |
f201d613 RB |
1464 | else |
1465 | return git_reference_lookup_resolved(ref_out, ref->owner, ref->target.symbolic, -1); | |
a46ec457 MS |
1466 | } |
1467 | ||
1a481123 | 1468 | int git_reference_packall(git_repository *repo) |
87d3acf4 | 1469 | { |
1a481123 VM |
1470 | if (packed_load(repo) < 0 || /* load the existing packfile */ |
1471 | packed_loadloose(repo) < 0 || /* add all the loose refs */ | |
1472 | packed_write(repo) < 0) /* write back to disk */ | |
45d387ac | 1473 | return -1; |
87d3acf4 | 1474 | |
45d387ac | 1475 | return 0; |
87d3acf4 VM |
1476 | } |
1477 | ||
d4a0b124 VM |
1478 | int git_reference_foreach( |
1479 | git_repository *repo, | |
1480 | unsigned int list_flags, | |
1481 | int (*callback)(const char *, void *), | |
1a481123 | 1482 | void *payload) |
00571828 | 1483 | { |
45d387ac | 1484 | int result; |
00571828 | 1485 | struct dirent_list_data data; |
97769280 | 1486 | git_buf refs_path = GIT_BUF_INIT; |
00571828 | 1487 | |
7ad96e51 | 1488 | /* list all the packed references first */ |
00571828 VM |
1489 | if (list_flags & GIT_REF_PACKED) { |
1490 | const char *ref_name; | |
01fed0a8 | 1491 | void *ref; |
9738e2cd | 1492 | GIT_UNUSED(ref); |
00571828 | 1493 | |
1a481123 | 1494 | if (packed_load(repo) < 0) |
45d387ac | 1495 | return -1; |
00571828 | 1496 | |
c2b67043 | 1497 | git_strmap_foreach(repo->references.packfile, ref_name, ref, { |
5dca2010 RB |
1498 | if (callback(ref_name, payload)) |
1499 | return GIT_EUSER; | |
01fed0a8 | 1500 | }); |
00571828 VM |
1501 | } |
1502 | ||
7ad96e51 VM |
1503 | /* now list the loose references, trying not to |
1504 | * duplicate the ref names already in the packed-refs file */ | |
09e8de0f VM |
1505 | |
1506 | data.repo_path_len = strlen(repo->path_repository); | |
1507 | data.list_flags = list_flags; | |
1508 | data.repo = repo; | |
1509 | data.callback = callback; | |
1510 | data.callback_payload = payload; | |
5dca2010 | 1511 | data.callback_error = 0; |
09e8de0f | 1512 | |
1a481123 | 1513 | if (git_buf_joinpath(&refs_path, repo->path_repository, GIT_REFS_DIR) < 0) |
45d387ac | 1514 | return -1; |
97769280 | 1515 | |
1a481123 | 1516 | result = git_path_direach(&refs_path, _dirent_loose_listall, &data); |
5dca2010 | 1517 | |
97769280 RB |
1518 | git_buf_free(&refs_path); |
1519 | ||
5dca2010 | 1520 | return data.callback_error ? GIT_EUSER : result; |
09e8de0f VM |
1521 | } |
1522 | ||
d568d585 | 1523 | static int cb__reflist_add(const char *ref, void *data) |
09e8de0f VM |
1524 | { |
1525 | return git_vector_insert((git_vector *)data, git__strdup(ref)); | |
1526 | } | |
1527 | ||
4fbd1c00 | 1528 | int git_reference_list( |
d4a0b124 VM |
1529 | git_strarray *array, |
1530 | git_repository *repo, | |
1a481123 | 1531 | unsigned int list_flags) |
09e8de0f | 1532 | { |
09e8de0f VM |
1533 | git_vector ref_list; |
1534 | ||
1535 | assert(array && repo); | |
1536 | ||
1537 | array->strings = NULL; | |
1538 | array->count = 0; | |
1539 | ||
0d0fa7c3 | 1540 | if (git_vector_init(&ref_list, 8, NULL) < 0) |
45d387ac | 1541 | return -1; |
7ad96e51 | 1542 | |
45d387ac | 1543 | if (git_reference_foreach( |
1a481123 | 1544 | repo, list_flags, &cb__reflist_add, (void *)&ref_list) < 0) { |
09e8de0f | 1545 | git_vector_free(&ref_list); |
45d387ac | 1546 | return -1; |
7ad96e51 VM |
1547 | } |
1548 | ||
09e8de0f VM |
1549 | array->strings = (char **)ref_list.contents; |
1550 | array->count = ref_list.length; | |
1a481123 | 1551 | return 0; |
00571828 | 1552 | } |
87d3acf4 | 1553 | |
1a481123 | 1554 | int git_reference_reload(git_reference *ref) |
2f8a8ab2 | 1555 | { |
1a481123 | 1556 | return reference_lookup(ref); |
2f8a8ab2 | 1557 | } |
9282e921 | 1558 | |
2f8a8ab2 VM |
1559 | void git_repository__refcache_free(git_refcache *refs) |
1560 | { | |
2f8a8ab2 VM |
1561 | assert(refs); |
1562 | ||
87d3acf4 | 1563 | if (refs->packfile) { |
d4a0b124 VM |
1564 | struct packref *reference; |
1565 | ||
c2b67043 | 1566 | git_strmap_foreach_value(refs->packfile, reference, { |
01fed0a8 RB |
1567 | git__free(reference); |
1568 | }); | |
87d3acf4 | 1569 | |
c2b67043 | 1570 | git_strmap_free(refs->packfile); |
87d3acf4 | 1571 | } |
9282e921 | 1572 | } |
2f8a8ab2 | 1573 | |
d4a0b124 | 1574 | static int is_valid_ref_char(char ch) |
aa2120e9 | 1575 | { |
50a8fd03 | 1576 | if ((unsigned) ch <= ' ') |
d4a0b124 | 1577 | return 0; |
aa2120e9 | 1578 | |
1579 | switch (ch) { | |
1580 | case '~': | |
1581 | case '^': | |
1582 | case ':': | |
1583 | case '\\': | |
1584 | case '?': | |
1585 | case '[': | |
e1be1028 | 1586 | case '*': |
d4a0b124 | 1587 | return 0; |
aa2120e9 | 1588 | default: |
d4a0b124 | 1589 | return 1; |
aa2120e9 | 1590 | } |
1591 | } | |
1592 | ||
c030ada7 | 1593 | static int ensure_segment_validity(const char *name) |
aa2120e9 | 1594 | { |
c030ada7 | 1595 | const char *current = name; |
1596 | char prev = '\0'; | |
aa2120e9 | 1597 | |
c030ada7 | 1598 | if (*current == '.') |
1599 | return -1; /* Refname starts with "." */ | |
aa2120e9 | 1600 | |
c030ada7 | 1601 | for (current = name; ; current++) { |
1602 | if (*current == '\0' || *current == '/') | |
1603 | break; | |
2e0c8816 | 1604 | |
c030ada7 | 1605 | if (!is_valid_ref_char(*current)) |
1606 | return -1; /* Illegal character in refname */ | |
aa2120e9 | 1607 | |
c030ada7 | 1608 | if (prev == '.' && *current == '.') |
1609 | return -1; /* Refname contains ".." */ | |
3101a3e5 | 1610 | |
c030ada7 | 1611 | if (prev == '@' && *current == '{') |
1612 | return -1; /* Refname contains "@{" */ | |
aa2120e9 | 1613 | |
c030ada7 | 1614 | prev = *current; |
1615 | } | |
aa2120e9 | 1616 | |
7c411fd9 | 1617 | return (int)(current - name); |
c030ada7 | 1618 | } |
aa2120e9 | 1619 | |
7c411fd9 | 1620 | static bool is_all_caps_and_underscore(const char *name, size_t len) |
77e06d7e | 1621 | { |
7c411fd9 | 1622 | size_t i; |
77e06d7e | 1623 | char c; |
1624 | ||
1625 | assert(name && len > 0); | |
1626 | ||
1627 | for (i = 0; i < len; i++) | |
1628 | { | |
1629 | c = name[i]; | |
1630 | if ((c < 'A' || c > 'Z') && c != '_') | |
1631 | return false; | |
1632 | } | |
1633 | ||
1634 | if (*name == '_' || name[len - 1] == '_') | |
1635 | return false; | |
1636 | ||
1637 | return true; | |
1638 | } | |
1639 | ||
c030ada7 | 1640 | int git_reference__normalize_name( |
1641 | git_buf *buf, | |
1642 | const char *name, | |
1643 | unsigned int flags) | |
1644 | { | |
1645 | // Inspired from https://github.com/git/git/blob/f06d47e7e0d9db709ee204ed13a8a7486149f494/refs.c#L36-100 | |
1646 | ||
1647 | char *current; | |
1648 | int segment_len, segments_count = 0, error = -1; | |
77e06d7e | 1649 | unsigned int process_flags; |
1650 | bool normalize = (buf != NULL); | |
1651 | assert(name); | |
c030ada7 | 1652 | |
77e06d7e | 1653 | process_flags = flags; |
c030ada7 | 1654 | current = (char *)name; |
1655 | ||
77e06d7e | 1656 | if (normalize) |
1657 | git_buf_clear(buf); | |
c030ada7 | 1658 | |
1659 | while (true) { | |
1660 | segment_len = ensure_segment_validity(current); | |
1661 | if (segment_len < 0) { | |
77e06d7e | 1662 | if ((process_flags & GIT_REF_FORMAT_REFSPEC_PATTERN) && |
c030ada7 | 1663 | current[0] == '*' && |
1664 | (current[1] == '\0' || current[1] == '/')) { | |
1665 | /* Accept one wildcard as a full refname component. */ | |
77e06d7e | 1666 | process_flags &= ~GIT_REF_FORMAT_REFSPEC_PATTERN; |
c030ada7 | 1667 | segment_len = 1; |
1668 | } else | |
1669 | goto cleanup; | |
1670 | } | |
aa2120e9 | 1671 | |
c030ada7 | 1672 | if (segment_len > 0) { |
77e06d7e | 1673 | if (normalize) { |
7c411fd9 | 1674 | size_t cur_len = git_buf_len(buf); |
aa2120e9 | 1675 | |
77e06d7e | 1676 | git_buf_joinpath(buf, git_buf_cstr(buf), current); |
7c411fd9 | 1677 | git_buf_truncate(buf, |
77e06d7e | 1678 | cur_len + segment_len + (segments_count ? 1 : 0)); |
aa2120e9 | 1679 | |
77e06d7e | 1680 | if (git_buf_oom(buf)) |
1681 | goto cleanup; | |
1682 | } | |
aa2120e9 | 1683 | |
77e06d7e | 1684 | segments_count++; |
0844ed06 | 1685 | } |
2e0c8816 | 1686 | |
c030ada7 | 1687 | if (current[segment_len] == '\0') |
1688 | break; | |
aa2120e9 | 1689 | |
c030ada7 | 1690 | current += segment_len + 1; |
2e0c8816 | 1691 | } |
3101a3e5 | 1692 | |
c030ada7 | 1693 | /* A refname can not be empty */ |
77e06d7e | 1694 | if (segment_len == 0 && segments_count == 0) |
c030ada7 | 1695 | goto cleanup; |
1696 | ||
1697 | /* A refname can not end with "." */ | |
1698 | if (current[segment_len - 1] == '.') | |
1699 | goto cleanup; | |
1700 | ||
1701 | /* A refname can not end with "/" */ | |
1702 | if (current[segment_len - 1] == '/') | |
1703 | goto cleanup; | |
1704 | ||
1705 | /* A refname can not end with ".lock" */ | |
1706 | if (!git__suffixcmp(name, GIT_FILELOCK_EXTENSION)) | |
1707 | goto cleanup; | |
1708 | ||
77e06d7e | 1709 | if ((segments_count == 1 ) && !(flags & GIT_REF_FORMAT_ALLOW_ONELEVEL)) |
1710 | goto cleanup; | |
1711 | ||
1712 | if ((segments_count == 1 ) && | |
7c411fd9 | 1713 | !(is_all_caps_and_underscore(name, (size_t)segment_len) || |
77e06d7e | 1714 | ((flags & GIT_REF_FORMAT_REFSPEC_PATTERN) && !strcmp("*", name)))) |
1715 | goto cleanup; | |
1716 | ||
1717 | if ((segments_count > 1) | |
1718 | && (is_all_caps_and_underscore(name, strchr(name, '/') - name))) | |
1719 | goto cleanup; | |
aa2120e9 | 1720 | |
c030ada7 | 1721 | error = 0; |
aa2120e9 | 1722 | |
c030ada7 | 1723 | cleanup: |
1724 | if (error) | |
1725 | giterr_set( | |
1726 | GITERR_REFERENCE, | |
1727 | "The given reference name '%s' is not valid", name); | |
aa2120e9 | 1728 | |
c030ada7 | 1729 | return error; |
1730 | } | |
1a481123 | 1731 | |
c030ada7 | 1732 | int git_reference_normalize_name( |
1733 | char *buffer_out, | |
1734 | size_t buffer_size, | |
1735 | const char *name, | |
1736 | unsigned int flags) | |
1737 | { | |
1738 | git_buf buf = GIT_BUF_INIT; | |
1739 | int error; | |
1740 | ||
1741 | if ((error = git_reference__normalize_name(&buf, name, flags)) < 0) | |
1742 | goto cleanup; | |
1743 | ||
1744 | if (git_buf_len(&buf) > buffer_size - 1) { | |
1745 | giterr_set( | |
2e0c8816 | 1746 | GITERR_REFERENCE, |
c030ada7 | 1747 | "The provided buffer is too short to hold the normalization of '%s'", name); |
1748 | error = GIT_EBUFS; | |
1749 | goto cleanup; | |
1750 | } | |
1751 | ||
1752 | git_buf_copy_cstr(buffer_out, buffer_size, &buf); | |
1753 | ||
1754 | error = 0; | |
1755 | ||
1756 | cleanup: | |
1757 | git_buf_free(&buf); | |
1758 | return error; | |
aa2120e9 | 1759 | } |
2f8a8ab2 | 1760 | |
c030ada7 | 1761 | int git_reference__normalize_name_lax( |
d4a0b124 VM |
1762 | char *buffer_out, |
1763 | size_t out_size, | |
1764 | const char *name) | |
86194b24 | 1765 | { |
2e0c8816 | 1766 | return git_reference_normalize_name( |
1767 | buffer_out, | |
1768 | out_size, | |
1769 | name, | |
1770 | GIT_REF_FORMAT_ALLOW_ONELEVEL); | |
86194b24 | 1771 | } |
f201d613 RB |
1772 | #define GIT_REF_TYPEMASK (GIT_REF_OID | GIT_REF_SYMBOLIC) |
1773 | ||
1774 | int git_reference_cmp(git_reference *ref1, git_reference *ref2) | |
1775 | { | |
1776 | assert(ref1 && ref2); | |
1777 | ||
1778 | /* let's put symbolic refs before OIDs */ | |
1779 | if ((ref1->flags & GIT_REF_TYPEMASK) != (ref2->flags & GIT_REF_TYPEMASK)) | |
1780 | return (ref1->flags & GIT_REF_SYMBOLIC) ? -1 : 1; | |
1781 | ||
1782 | if (ref1->flags & GIT_REF_SYMBOLIC) | |
1783 | return strcmp(ref1->target.symbolic, ref2->target.symbolic); | |
1784 | ||
1785 | return git_oid_cmp(&ref1->target.oid, &ref2->target.oid); | |
1786 | } | |
1787 | ||
edebceff | 1788 | /* Update the reference named `ref_name` so it points to `oid` */ |
1789 | int git_reference__update(git_repository *repo, const git_oid *oid, const char *ref_name) | |
1790 | { | |
1791 | git_reference *ref; | |
1792 | int res; | |
1793 | ||
1794 | res = git_reference_lookup(&ref, repo, ref_name); | |
1795 | ||
1796 | /* If we haven't found the reference at all, we assume we need to create | |
1797 | * a new reference and that's it */ | |
1798 | if (res == GIT_ENOTFOUND) { | |
1799 | giterr_clear(); | |
1800 | return git_reference_create_oid(NULL, repo, ref_name, oid, 1); | |
1801 | } | |
1802 | ||
1803 | if (res < 0) | |
1804 | return -1; | |
1805 | ||
1806 | /* If we have found a reference, but it's symbolic, we need to update | |
1807 | * the direct reference it points to */ | |
1808 | if (git_reference_type(ref) == GIT_REF_SYMBOLIC) { | |
1809 | git_reference *aux; | |
1810 | const char *sym_target; | |
1811 | ||
1812 | /* The target pointed at by this reference */ | |
1813 | sym_target = git_reference_target(ref); | |
1814 | ||
1815 | /* resolve the reference to the target it points to */ | |
1816 | res = git_reference_resolve(&aux, ref); | |
1817 | ||
1818 | /* | |
1819 | * if the symbolic reference pointed to an inexisting ref, | |
1820 | * this is means we're creating a new branch, for example. | |
1821 | * We need to create a new direct reference with that name | |
1822 | */ | |
1823 | if (res == GIT_ENOTFOUND) { | |
1824 | giterr_clear(); | |
1825 | res = git_reference_create_oid(NULL, repo, sym_target, oid, 1); | |
1826 | git_reference_free(ref); | |
1827 | return res; | |
1828 | } | |
1829 | ||
1830 | /* free the original symbolic reference now; not before because | |
1831 | * we're using the `sym_target` pointer */ | |
1832 | git_reference_free(ref); | |
1833 | ||
1834 | if (res < 0) | |
1835 | return -1; | |
1836 | ||
1837 | /* store the newly found direct reference in its place */ | |
1838 | ref = aux; | |
1839 | } | |
1840 | ||
1841 | /* ref is made to point to `oid`: ref is either the original reference, | |
1842 | * or the target of the symbolic reference we've looked up */ | |
1843 | res = git_reference_set_oid(ref, oid); | |
1844 | git_reference_free(ref); | |
1845 | return res; | |
1846 | } | |
527ed554 | 1847 | |
1848 | struct glob_cb_data { | |
1849 | const char *glob; | |
1850 | int (*callback)(const char *, void *); | |
1851 | void *payload; | |
1852 | }; | |
1853 | ||
1854 | static int fromglob_cb(const char *reference_name, void *payload) | |
1855 | { | |
1856 | struct glob_cb_data *data = (struct glob_cb_data *)payload; | |
1857 | ||
1858 | if (!p_fnmatch(data->glob, reference_name, 0)) | |
1859 | return data->callback(reference_name, data->payload); | |
1860 | ||
1861 | return 0; | |
1862 | } | |
1863 | ||
1864 | int git_reference_foreach_glob( | |
1865 | git_repository *repo, | |
1866 | const char *glob, | |
1867 | unsigned int list_flags, | |
1868 | int (*callback)( | |
1869 | const char *reference_name, | |
1870 | void *payload), | |
1871 | void *payload) | |
1872 | { | |
1873 | struct glob_cb_data data; | |
1874 | ||
1875 | assert(repo && glob && callback); | |
1876 | ||
1877 | data.glob = glob; | |
1878 | data.callback = callback; | |
1879 | data.payload = payload; | |
1880 | ||
1881 | return git_reference_foreach( | |
1882 | repo, list_flags, fromglob_cb, &data); | |
1883 | } | |
75261421 | 1884 | |
1885 | int git_reference_has_log( | |
1886 | git_reference *ref) | |
1887 | { | |
1888 | git_buf path = GIT_BUF_INIT; | |
1889 | int result; | |
1890 | ||
1891 | assert(ref); | |
1892 | ||
1893 | if (git_buf_join_n(&path, '/', 3, ref->owner->path_repository, GIT_REFLOG_DIR, ref->name) < 0) | |
1894 | return -1; | |
1895 | ||
1896 | result = git_path_isfile(git_buf_cstr(&path)); | |
1897 | git_buf_free(&path); | |
1898 | ||
1899 | return result; | |
1900 | } | |
84f18e35 | 1901 | |
88bcd515 | 1902 | int git_reference_is_branch(git_reference *ref) |
1903 | { | |
1904 | assert(ref); | |
88bcd515 | 1905 | return git__prefixcmp(ref->name, GIT_REFS_HEADS_DIR) == 0; |
1906 | } | |
1c947daa VM |
1907 | |
1908 | int git_reference_is_remote(git_reference *ref) | |
1909 | { | |
1910 | assert(ref); | |
1911 | return git__prefixcmp(ref->name, GIT_REFS_REMOTES_DIR) == 0; | |
1912 | } | |
31665948 | 1913 | |
1914 | static int peel_error(int error, git_reference *ref, const char* msg) | |
1915 | { | |
1916 | giterr_set( | |
1917 | GITERR_INVALID, | |
1918 | "The reference '%s' cannot be peeled - %s", git_reference_name(ref), msg); | |
1919 | return error; | |
1920 | } | |
1921 | ||
1922 | static int reference_target(git_object **object, git_reference *ref) | |
1923 | { | |
1924 | const git_oid *oid; | |
1925 | ||
1926 | oid = git_reference_oid(ref); | |
1927 | ||
1928 | return git_object_lookup(object, git_reference_owner(ref), oid, GIT_OBJ_ANY); | |
1929 | } | |
1930 | ||
1931 | int git_reference_peel( | |
1932 | git_object **peeled, | |
1933 | git_reference *ref, | |
1934 | git_otype target_type) | |
1935 | { | |
1936 | git_reference *resolved = NULL; | |
1937 | git_object *target = NULL; | |
1938 | int error; | |
1939 | ||
1940 | assert(ref); | |
1941 | ||
1942 | if ((error = git_reference_resolve(&resolved, ref)) < 0) | |
1943 | return peel_error(error, ref, "Cannot resolve reference"); | |
1944 | ||
1945 | if ((error = reference_target(&target, resolved)) < 0) { | |
1946 | peel_error(error, ref, "Cannot retrieve reference target"); | |
1947 | goto cleanup; | |
1948 | } | |
b90500f0 | 1949 | |
31665948 | 1950 | if (target_type == GIT_OBJ_ANY && git_object_type(target) != GIT_OBJ_TAG) |
1951 | error = git_object__dup(peeled, target); | |
b90500f0 | 1952 | else |
31665948 | 1953 | error = git_object_peel(peeled, target, target_type); |
1954 | ||
1955 | cleanup: | |
1956 | git_object_free(target); | |
1957 | git_reference_free(resolved); | |
1958 | return error; | |
1959 | } | |
77e06d7e | 1960 | |
0adfa20a | 1961 | int git_reference__is_valid_name( |
1962 | const char *refname, | |
1963 | unsigned int flags) | |
1964 | { | |
1965 | giterr_clear(); | |
1966 | return git_reference__normalize_name(NULL, refname, flags) == 0; | |
1967 | } | |
1968 | ||
77e06d7e | 1969 | int git_reference_is_valid_name( |
1970 | const char *refname) | |
1971 | { | |
0adfa20a | 1972 | return git_reference__is_valid_name( |
77e06d7e | 1973 | refname, |
0adfa20a | 1974 | GIT_REF_FORMAT_ALLOW_ONELEVEL); |
77e06d7e | 1975 | } |