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Commit | Line | Data |
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9282e921 | 1 | /* |
359fc2d2 | 2 | * Copyright (C) the libgit2 contributors. All rights reserved. |
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" |
d00d5464 | 14 | #include "refdb.h" |
9282e921 | 15 | |
87d3acf4 VM |
16 | #include <git2/tag.h> |
17 | #include <git2/object.h> | |
c07d9c95 | 18 | #include <git2/oid.h> |
4ba23be1 | 19 | #include <git2/branch.h> |
d00d5464 ET |
20 | #include <git2/refs.h> |
21 | #include <git2/refdb.h> | |
21ca0451 | 22 | #include <git2/sys/refs.h> |
87d3acf4 | 23 | |
c2b67043 | 24 | GIT__USE_STRMAP; |
01fed0a8 | 25 | |
f201d613 RB |
26 | #define DEFAULT_NESTING_LEVEL 5 |
27 | #define MAX_NESTING_LEVEL 10 | |
9282e921 | 28 | |
d4a0b124 VM |
29 | enum { |
30 | GIT_PACKREF_HAS_PEEL = 1, | |
31 | GIT_PACKREF_WAS_LOOSE = 2 | |
32 | }; | |
86194b24 | 33 | |
4e4eab52 | 34 | static git_reference *alloc_ref(const char *name) |
3be933b1 VM |
35 | { |
36 | git_reference *ref; | |
37 | size_t namelen = strlen(name); | |
86194b24 | 38 | |
3be933b1 VM |
39 | if ((ref = git__calloc(1, sizeof(git_reference) + namelen + 1)) == NULL) |
40 | return NULL; | |
41 | ||
3be933b1 VM |
42 | memcpy(ref->name, name, namelen + 1); |
43 | ||
44 | return ref; | |
45 | } | |
46 | ||
47 | git_reference *git_reference__alloc_symbolic( | |
21ca0451 | 48 | const char *name, const char *target) |
2f8a8ab2 | 49 | { |
d00d5464 | 50 | git_reference *ref; |
2f8a8ab2 | 51 | |
4e4eab52 | 52 | assert(name && target); |
55e0f53d | 53 | |
4e4eab52 | 54 | ref = alloc_ref(name); |
3be933b1 | 55 | if (!ref) |
d00d5464 | 56 | return NULL; |
87d3acf4 | 57 | |
3be933b1 | 58 | ref->type = GIT_REF_SYMBOLIC; |
87d3acf4 | 59 | |
3be933b1 VM |
60 | if ((ref->target.symbolic = git__strdup(target)) == NULL) { |
61 | git__free(ref); | |
62 | return NULL; | |
d79f1da6 | 63 | } |
55e0f53d | 64 | |
3be933b1 VM |
65 | return ref; |
66 | } | |
67 | ||
68 | git_reference *git_reference__alloc( | |
3be933b1 VM |
69 | const char *name, |
70 | const git_oid *oid, | |
71 | const git_oid *peel) | |
72 | { | |
73 | git_reference *ref; | |
74 | ||
4e4eab52 | 75 | assert(name && oid); |
3be933b1 | 76 | |
4e4eab52 | 77 | ref = alloc_ref(name); |
3be933b1 VM |
78 | if (!ref) |
79 | return NULL; | |
80 | ||
81 | ref->type = GIT_REF_OID; | |
fedd0f9e | 82 | git_oid_cpy(&ref->target.oid, oid); |
3be933b1 VM |
83 | |
84 | if (peel != NULL) | |
fedd0f9e | 85 | git_oid_cpy(&ref->peel, peel); |
55e0f53d | 86 | |
d00d5464 | 87 | return ref; |
2f8a8ab2 | 88 | } |
9282e921 | 89 | |
d00d5464 | 90 | void git_reference_free(git_reference *reference) |
2f8a8ab2 | 91 | { |
d00d5464 ET |
92 | if (reference == NULL) |
93 | return; | |
2b397327 | 94 | |
3be933b1 | 95 | if (reference->type == GIT_REF_SYMBOLIC) |
d00d5464 | 96 | git__free(reference->target.symbolic); |
2f8a8ab2 | 97 | |
d00d5464 | 98 | git__free(reference); |
87d3acf4 | 99 | } |
2f8a8ab2 | 100 | |
45d387ac VM |
101 | struct reference_available_t { |
102 | const char *new_ref; | |
103 | const char *old_ref; | |
104 | int available; | |
105 | }; | |
106 | ||
1b6d8163 MS |
107 | static int _reference_available_cb(const char *ref, void *data) |
108 | { | |
45d387ac | 109 | struct reference_available_t *d; |
f120e92b | 110 | |
1b6d8163 | 111 | assert(ref && data); |
1a481123 | 112 | d = (struct reference_available_t *)data; |
1b6d8163 | 113 | |
45d387ac | 114 | if (!d->old_ref || strcmp(d->old_ref, ref)) { |
44ef8b1b RB |
115 | size_t reflen = strlen(ref); |
116 | size_t newlen = strlen(d->new_ref); | |
117 | size_t cmplen = reflen < newlen ? reflen : newlen; | |
45d387ac | 118 | const char *lead = reflen < newlen ? d->new_ref : ref; |
1b6d8163 | 119 | |
45d387ac VM |
120 | if (!strncmp(d->new_ref, ref, cmplen) && lead[cmplen] == '/') { |
121 | d->available = 0; | |
122 | return -1; | |
123 | } | |
1b6d8163 MS |
124 | } |
125 | ||
45d387ac | 126 | return 0; |
1b6d8163 MS |
127 | } |
128 | ||
1a481123 | 129 | static int reference_path_available( |
d4a0b124 VM |
130 | git_repository *repo, |
131 | const char *ref, | |
1a481123 | 132 | const char* old_ref) |
1b6d8163 | 133 | { |
5dca2010 | 134 | int error; |
45d387ac | 135 | struct reference_available_t data; |
1b6d8163 | 136 | |
45d387ac VM |
137 | data.new_ref = ref; |
138 | data.old_ref = old_ref; | |
139 | data.available = 1; | |
1b6d8163 | 140 | |
5dca2010 RB |
141 | error = git_reference_foreach( |
142 | repo, GIT_REF_LISTALL, _reference_available_cb, (void *)&data); | |
143 | if (error < 0) | |
144 | return error; | |
1a481123 VM |
145 | |
146 | if (!data.available) { | |
147 | giterr_set(GITERR_REFERENCE, | |
d00d5464 | 148 | "The path to reference '%s' collides with an existing one", ref); |
1a481123 | 149 | return -1; |
d4a0b124 | 150 | } |
2f8a8ab2 | 151 | |
1a481123 VM |
152 | return 0; |
153 | } | |
97769280 | 154 | |
1a481123 VM |
155 | /* |
156 | * Check if a reference could be written to disk, based on: | |
157 | * | |
158 | * - Whether a reference with the same name already exists, | |
159 | * and we are allowing or disallowing overwrites | |
160 | * | |
161 | * - Whether the name of the reference would collide with | |
162 | * an existing path | |
163 | */ | |
164 | static int reference_can_write( | |
165 | git_repository *repo, | |
166 | const char *refname, | |
167 | const char *previous_name, | |
168 | int force) | |
169 | { | |
d00d5464 ET |
170 | git_refdb *refdb; |
171 | ||
172 | if (git_repository_refdb__weakptr(&refdb, repo) < 0) | |
173 | return -1; | |
174 | ||
1a481123 VM |
175 | /* see if the reference shares a path with an existing reference; |
176 | * if a path is shared, we cannot create the reference, even when forcing */ | |
177 | if (reference_path_available(repo, refname, previous_name) < 0) | |
178 | return -1; | |
179 | ||
180 | /* check if the reference actually exists, but only if we are not forcing | |
181 | * the rename. If we are forcing, it's OK to overwrite */ | |
182 | if (!force) { | |
183 | int exists; | |
184 | ||
d00d5464 | 185 | if (git_refdb_exists(&exists, refdb, refname) < 0) |
1a481123 VM |
186 | return -1; |
187 | ||
188 | /* We cannot proceed if the reference already exists and we're not forcing | |
189 | * the rename; the existing one would be overwritten */ | |
190 | if (exists) { | |
191 | giterr_set(GITERR_REFERENCE, | |
e1de726c | 192 | "A reference with that name (%s) already exists", refname); |
904b67e6 | 193 | return GIT_EEXISTS; |
1a481123 VM |
194 | } |
195 | } | |
196 | ||
197 | /* FIXME: if the reference exists and we are forcing, do we really need to | |
198 | * remove the reference first? | |
199 | * | |
200 | * Two cases: | |
201 | * | |
202 | * - the reference already exists and is loose: not a problem, the file | |
203 | * gets overwritten on disk | |
204 | * | |
205 | * - the reference already exists and is packed: we write a new one as | |
206 | * loose, which by all means renders the packed one useless | |
207 | */ | |
208 | ||
209 | return 0; | |
d4a0b124 | 210 | } |
2f8a8ab2 | 211 | |
1a481123 | 212 | int git_reference_delete(git_reference *ref) |
a46ec457 | 213 | { |
d00d5464 | 214 | return git_refdb_delete(ref->db, ref); |
a46ec457 MS |
215 | } |
216 | ||
d4a0b124 | 217 | int git_reference_lookup(git_reference **ref_out, |
1a481123 | 218 | git_repository *repo, const char *name) |
a46ec457 | 219 | { |
f201d613 RB |
220 | return git_reference_lookup_resolved(ref_out, repo, name, 0); |
221 | } | |
222 | ||
2508cc66 | 223 | int git_reference_name_to_id( |
f201d613 RB |
224 | git_oid *out, git_repository *repo, const char *name) |
225 | { | |
226 | int error; | |
227 | git_reference *ref; | |
228 | ||
229 | if ((error = git_reference_lookup_resolved(&ref, repo, name, -1)) < 0) | |
230 | return error; | |
231 | ||
2508cc66 | 232 | git_oid_cpy(out, git_reference_target(ref)); |
f201d613 RB |
233 | git_reference_free(ref); |
234 | return 0; | |
235 | } | |
236 | ||
237 | int git_reference_lookup_resolved( | |
238 | git_reference **ref_out, | |
239 | git_repository *repo, | |
240 | const char *name, | |
241 | int max_nesting) | |
242 | { | |
d00d5464 ET |
243 | char scan_name[GIT_REFNAME_MAX]; |
244 | git_ref_t scan_type; | |
245 | int error = 0, nesting; | |
246 | git_reference *ref = NULL; | |
247 | git_refdb *refdb; | |
d4a0b124 VM |
248 | |
249 | assert(ref_out && repo && name); | |
f201d613 | 250 | |
1a481123 | 251 | *ref_out = NULL; |
d4a0b124 | 252 | |
f201d613 RB |
253 | if (max_nesting > MAX_NESTING_LEVEL) |
254 | max_nesting = MAX_NESTING_LEVEL; | |
255 | else if (max_nesting < 0) | |
256 | max_nesting = DEFAULT_NESTING_LEVEL; | |
4dcd8780 | 257 | |
d00d5464 ET |
258 | strncpy(scan_name, name, GIT_REFNAME_MAX); |
259 | scan_type = GIT_REF_SYMBOLIC; | |
4dcd8780 | 260 | |
d00d5464 ET |
261 | if ((error = git_repository_refdb__weakptr(&refdb, repo)) < 0) |
262 | return -1; | |
a46ec457 | 263 | |
d00d5464 ET |
264 | if ((error = git_reference__normalize_name_lax(scan_name, GIT_REFNAME_MAX, name)) < 0) |
265 | return error; | |
f201d613 RB |
266 | |
267 | for (nesting = max_nesting; | |
d00d5464 | 268 | nesting >= 0 && scan_type == GIT_REF_SYMBOLIC; |
f201d613 RB |
269 | nesting--) |
270 | { | |
d00d5464 ET |
271 | if (nesting != max_nesting) { |
272 | strncpy(scan_name, ref->target.symbolic, GIT_REFNAME_MAX); | |
273 | git_reference_free(ref); | |
274 | } | |
f201d613 | 275 | |
d00d5464 ET |
276 | if ((error = git_refdb_lookup(&ref, refdb, scan_name)) < 0) |
277 | return error; | |
4dcd8780 | 278 | |
d00d5464 | 279 | scan_type = ref->type; |
f201d613 RB |
280 | } |
281 | ||
d00d5464 | 282 | if (scan_type != GIT_REF_OID && max_nesting != 0) { |
f201d613 RB |
283 | giterr_set(GITERR_REFERENCE, |
284 | "Cannot resolve reference (>%u levels deep)", max_nesting); | |
d00d5464 | 285 | git_reference_free(ref); |
f201d613 RB |
286 | return -1; |
287 | } | |
288 | ||
d00d5464 | 289 | *ref_out = ref; |
f201d613 | 290 | return 0; |
a46ec457 MS |
291 | } |
292 | ||
d4a0b124 VM |
293 | /** |
294 | * Getters | |
295 | */ | |
2508cc66 | 296 | git_ref_t git_reference_type(const git_reference *ref) |
87d3acf4 VM |
297 | { |
298 | assert(ref); | |
d00d5464 | 299 | return ref->type; |
87d3acf4 VM |
300 | } |
301 | ||
2508cc66 | 302 | const char *git_reference_name(const git_reference *ref) |
87d3acf4 VM |
303 | { |
304 | assert(ref); | |
d4a0b124 | 305 | return ref->name; |
87d3acf4 VM |
306 | } |
307 | ||
2508cc66 | 308 | git_repository *git_reference_owner(const git_reference *ref) |
a46ec457 | 309 | { |
d4a0b124 | 310 | assert(ref); |
d00d5464 | 311 | return ref->db->repo; |
a46ec457 MS |
312 | } |
313 | ||
2508cc66 | 314 | const git_oid *git_reference_target(const git_reference *ref) |
87d3acf4 VM |
315 | { |
316 | assert(ref); | |
317 | ||
d00d5464 | 318 | if (ref->type != GIT_REF_OID) |
87d3acf4 VM |
319 | return NULL; |
320 | ||
fedd0f9e | 321 | return &ref->target.oid; |
3be933b1 VM |
322 | } |
323 | ||
324 | const git_oid *git_reference_target_peel(const git_reference *ref) | |
325 | { | |
326 | assert(ref); | |
327 | ||
fedd0f9e | 328 | if (ref->type != GIT_REF_OID || git_oid_iszero(&ref->peel)) |
3be933b1 VM |
329 | return NULL; |
330 | ||
fedd0f9e | 331 | return &ref->peel; |
87d3acf4 VM |
332 | } |
333 | ||
2508cc66 | 334 | const char *git_reference_symbolic_target(const git_reference *ref) |
a46ec457 | 335 | { |
d4a0b124 | 336 | assert(ref); |
a46ec457 | 337 | |
d00d5464 | 338 | if (ref->type != GIT_REF_SYMBOLIC) |
a46ec457 MS |
339 | return NULL; |
340 | ||
d4a0b124 | 341 | return ref->target.symbolic; |
a46ec457 MS |
342 | } |
343 | ||
d00d5464 | 344 | static int reference__create( |
d4a0b124 VM |
345 | git_reference **ref_out, |
346 | git_repository *repo, | |
347 | const char *name, | |
d00d5464 ET |
348 | const git_oid *oid, |
349 | const char *symbolic, | |
1a481123 | 350 | int force) |
d5afc039 VM |
351 | { |
352 | char normalized[GIT_REFNAME_MAX]; | |
d00d5464 | 353 | git_refdb *refdb; |
d4a0b124 | 354 | git_reference *ref = NULL; |
d00d5464 | 355 | int error = 0; |
4dcd8780 | 356 | |
d00d5464 ET |
357 | if (ref_out) |
358 | *ref_out = NULL; | |
359 | ||
360 | if ((error = git_reference__normalize_name_lax(normalized, sizeof(normalized), name)) < 0 || | |
361 | (error = reference_can_write(repo, normalized, NULL, force)) < 0 || | |
362 | (error = git_repository_refdb__weakptr(&refdb, repo)) < 0) | |
c1281493 | 363 | return error; |
3be933b1 VM |
364 | |
365 | if (oid != NULL) { | |
366 | assert(symbolic == NULL); | |
4e4eab52 | 367 | ref = git_reference__alloc(name, oid, NULL); |
3be933b1 | 368 | } else { |
4e4eab52 | 369 | ref = git_reference__alloc_symbolic(name, symbolic); |
3be933b1 | 370 | } |
4dcd8780 | 371 | |
13421eee | 372 | GITERR_CHECK_ALLOC(ref); |
4e4eab52 | 373 | ref->db = refdb; |
d5afc039 | 374 | |
d00d5464 | 375 | if ((error = git_refdb_write(refdb, ref)) < 0) { |
45d387ac | 376 | git_reference_free(ref); |
d00d5464 | 377 | return error; |
45d387ac | 378 | } |
4dcd8780 | 379 | |
d00d5464 | 380 | if (ref_out == NULL) |
d4a0b124 | 381 | git_reference_free(ref); |
d00d5464 | 382 | else |
d4a0b124 | 383 | *ref_out = ref; |
d5afc039 | 384 | |
45d387ac | 385 | return 0; |
d5afc039 VM |
386 | } |
387 | ||
2508cc66 | 388 | int git_reference_create( |
d4a0b124 VM |
389 | git_reference **ref_out, |
390 | git_repository *repo, | |
391 | const char *name, | |
d00d5464 | 392 | const git_oid *oid, |
1a481123 | 393 | int force) |
a46ec457 | 394 | { |
d00d5464 ET |
395 | git_odb *odb; |
396 | int error = 0; | |
d5afc039 | 397 | |
d00d5464 | 398 | assert(repo && name && oid); |
4dcd8780 | 399 | |
d00d5464 ET |
400 | /* Sanity check the reference being created - target must exist. */ |
401 | if ((error = git_repository_odb__weakptr(&odb, repo)) < 0) | |
c1281493 | 402 | return error; |
4dcd8780 | 403 | |
d00d5464 ET |
404 | if (!git_odb_exists(odb, oid)) { |
405 | giterr_set(GITERR_REFERENCE, | |
406 | "Target OID for the reference doesn't exist on the repository"); | |
45d387ac VM |
407 | return -1; |
408 | } | |
4dcd8780 | 409 | |
d00d5464 | 410 | return reference__create(ref_out, repo, name, oid, NULL, force); |
a46ec457 | 411 | } |
87d3acf4 | 412 | |
d00d5464 ET |
413 | int git_reference_symbolic_create( |
414 | git_reference **ref_out, | |
415 | git_repository *repo, | |
416 | const char *name, | |
417 | const char *target, | |
418 | int force) | |
419 | { | |
420 | char normalized[GIT_REFNAME_MAX]; | |
421 | int error = 0; | |
87d3acf4 | 422 | |
d00d5464 | 423 | assert(repo && name && target); |
4dcd8780 | 424 | |
d00d5464 ET |
425 | if ((error = git_reference__normalize_name_lax( |
426 | normalized, sizeof(normalized), target)) < 0) | |
427 | return error; | |
9a53df7e | 428 | |
d00d5464 ET |
429 | return reference__create(ref_out, repo, name, NULL, normalized, force); |
430 | } | |
9462c471 | 431 | |
d00d5464 ET |
432 | int git_reference_set_target( |
433 | git_reference **out, | |
434 | git_reference *ref, | |
435 | const git_oid *id) | |
436 | { | |
437 | assert(out && ref && id); | |
4dcd8780 | 438 | |
d00d5464 ET |
439 | if (ref->type != GIT_REF_OID) { |
440 | giterr_set(GITERR_REFERENCE, "Cannot set OID on symbolic reference"); | |
45d387ac VM |
441 | return -1; |
442 | } | |
87d3acf4 | 443 | |
d00d5464 | 444 | return git_reference_create(out, ref->db->repo, ref->name, id, 1); |
a46ec457 MS |
445 | } |
446 | ||
d00d5464 ET |
447 | int git_reference_symbolic_set_target( |
448 | git_reference **out, | |
449 | git_reference *ref, | |
450 | const char *target) | |
87d3acf4 | 451 | { |
d00d5464 | 452 | assert(out && ref && target); |
4dcd8780 | 453 | |
d00d5464 | 454 | if (ref->type != GIT_REF_SYMBOLIC) { |
1a481123 | 455 | giterr_set(GITERR_REFERENCE, |
45d387ac VM |
456 | "Cannot set symbolic target on a direct reference"); |
457 | return -1; | |
458 | } | |
4dcd8780 | 459 | |
d00d5464 | 460 | return git_reference_symbolic_create(out, ref->db->repo, ref->name, target, 1); |
87d3acf4 VM |
461 | } |
462 | ||
d00d5464 ET |
463 | int git_reference_rename( |
464 | git_reference **out, | |
465 | git_reference *ref, | |
466 | const char *new_name, | |
467 | int force) | |
7376ad99 | 468 | { |
2e0c8816 | 469 | unsigned int normalization_flags; |
0ffcf78a | 470 | char normalized[GIT_REFNAME_MAX]; |
f3cc7834 | 471 | bool should_head_be_updated = false; |
d00d5464 | 472 | git_reference *result = NULL; |
d00d5464 | 473 | int error = 0; |
10c06114 | 474 | int reference_has_log; |
4dcd8780 | 475 | |
d00d5464 ET |
476 | *out = NULL; |
477 | ||
478 | normalization_flags = ref->type == GIT_REF_SYMBOLIC ? | |
479 | GIT_REF_FORMAT_ALLOW_ONELEVEL : GIT_REF_FORMAT_NORMAL; | |
480 | ||
3be933b1 VM |
481 | if ((error = git_reference_normalize_name( |
482 | normalized, sizeof(normalized), new_name, normalization_flags)) < 0 || | |
d00d5464 ET |
483 | (error = reference_can_write(ref->db->repo, normalized, ref->name, force)) < 0) |
484 | return error; | |
7376ad99 | 485 | |
0ffcf78a | 486 | /* |
d00d5464 | 487 | * Create the new reference. |
0ffcf78a | 488 | */ |
d00d5464 | 489 | if (ref->type == GIT_REF_OID) { |
4dcd8780 | 490 | result = git_reference__alloc(new_name, &ref->target.oid, &ref->peel); |
3be933b1 | 491 | } else if (ref->type == GIT_REF_SYMBOLIC) { |
4e4eab52 | 492 | result = git_reference__alloc_symbolic(new_name, ref->target.symbolic); |
0ffcf78a | 493 | } else { |
3be933b1 | 494 | assert(0); |
0ffcf78a | 495 | } |
3be933b1 VM |
496 | |
497 | if (result == NULL) | |
d00d5464 | 498 | return -1; |
7376ad99 | 499 | |
4e4eab52 ET |
500 | result->db = ref->db; |
501 | ||
d00d5464 | 502 | /* Check if we have to update HEAD. */ |
10c06114 | 503 | if ((error = git_branch_is_head(ref)) < 0) |
d00d5464 ET |
504 | goto on_error; |
505 | ||
10c06114 AS |
506 | should_head_be_updated = (error > 0); |
507 | ||
d00d5464 | 508 | /* Now delete the old ref and save the new one. */ |
10c06114 | 509 | if ((error = git_refdb_delete(ref->db, ref)) < 0) |
d00d5464 | 510 | goto on_error; |
4dcd8780 | 511 | |
d00d5464 ET |
512 | /* Save the new reference. */ |
513 | if ((error = git_refdb_write(ref->db, result)) < 0) | |
64093ce5 | 514 | goto rollback; |
4dcd8780 | 515 | |
d00d5464 | 516 | /* Update HEAD it was poiting to the reference being renamed. */ |
10c06114 | 517 | if (should_head_be_updated && (error = git_repository_set_head(ref->db->repo, new_name)) < 0) { |
d00d5464 ET |
518 | giterr_set(GITERR_REFERENCE, "Failed to update HEAD after renaming reference"); |
519 | goto on_error; | |
d4a0b124 VM |
520 | } |
521 | ||
d00d5464 | 522 | /* Rename the reflog file, if it exists. */ |
10c06114 AS |
523 | reference_has_log = git_reference_has_log(ref); |
524 | if (reference_has_log < 0) { | |
525 | error = reference_has_log; | |
526 | goto on_error; | |
527 | } | |
528 | if (reference_has_log && (error = git_reflog_rename(ref, new_name)) < 0) | |
d00d5464 | 529 | goto on_error; |
7376ad99 | 530 | |
d00d5464 | 531 | *out = result; |
45d387ac | 532 | |
d00d5464 | 533 | return error; |
7376ad99 | 534 | |
0ffcf78a | 535 | rollback: |
d00d5464 | 536 | git_refdb_write(ref->db, ref); |
0ffcf78a | 537 | |
d00d5464 ET |
538 | on_error: |
539 | git_reference_free(result); | |
64093ce5 | 540 | |
d00d5464 | 541 | return error; |
0ffcf78a | 542 | } |
7376ad99 | 543 | |
2508cc66 | 544 | int git_reference_resolve(git_reference **ref_out, const git_reference *ref) |
87d3acf4 | 545 | { |
3be933b1 VM |
546 | switch (git_reference_type(ref)) { |
547 | case GIT_REF_OID: | |
d00d5464 | 548 | return git_reference_lookup(ref_out, ref->db->repo, ref->name); |
4dcd8780 | 549 | |
3be933b1 VM |
550 | case GIT_REF_SYMBOLIC: |
551 | return git_reference_lookup_resolved(ref_out, ref->db->repo, ref->target.symbolic, -1); | |
552 | ||
553 | default: | |
554 | giterr_set(GITERR_REFERENCE, "Invalid reference"); | |
555 | return -1; | |
556 | } | |
87d3acf4 VM |
557 | } |
558 | ||
d4a0b124 VM |
559 | int git_reference_foreach( |
560 | git_repository *repo, | |
561 | unsigned int list_flags, | |
eecc8050 | 562 | git_reference_foreach_cb callback, |
1a481123 | 563 | void *payload) |
00571828 | 564 | { |
95727245 CMN |
565 | git_reference_iterator *iter; |
566 | const char *name; | |
567 | int error; | |
568 | ||
569 | GIT_UNUSED(list_flags); | |
570 | ||
571 | if (git_reference_iterator_new(&iter, repo) < 0) | |
572 | return -1; | |
00571828 | 573 | |
95727245 CMN |
574 | while ((error = git_reference_next(&name, iter)) == 0) { |
575 | if (callback(name, payload)) { | |
576 | error = GIT_EUSER; | |
577 | goto out; | |
578 | } | |
579 | } | |
580 | ||
581 | if (error == GIT_ITEROVER) | |
582 | error = 0; | |
583 | ||
584 | out: | |
585 | git_reference_iterator_free(iter); | |
586 | return error; | |
09e8de0f VM |
587 | } |
588 | ||
4def7035 CMN |
589 | int git_reference_iterator_new(git_reference_iterator **out, git_repository *repo) |
590 | { | |
591 | git_refdb *refdb; | |
592 | ||
593 | if (git_repository_refdb__weakptr(&refdb, repo) < 0) | |
594 | return -1; | |
595 | ||
596 | return git_refdb_iterator(out, refdb); | |
597 | } | |
598 | ||
599 | int git_reference_next(const char **out, git_reference_iterator *iter) | |
600 | { | |
601 | return git_refdb_next(out, iter); | |
602 | } | |
603 | ||
604 | void git_reference_iterator_free(git_reference_iterator *iter) | |
605 | { | |
606 | git_refdb_iterator_free(iter); | |
607 | } | |
608 | ||
d568d585 | 609 | static int cb__reflist_add(const char *ref, void *data) |
09e8de0f VM |
610 | { |
611 | return git_vector_insert((git_vector *)data, git__strdup(ref)); | |
612 | } | |
613 | ||
4fbd1c00 | 614 | int git_reference_list( |
d4a0b124 VM |
615 | git_strarray *array, |
616 | git_repository *repo, | |
1a481123 | 617 | unsigned int list_flags) |
09e8de0f | 618 | { |
09e8de0f VM |
619 | git_vector ref_list; |
620 | ||
621 | assert(array && repo); | |
622 | ||
623 | array->strings = NULL; | |
624 | array->count = 0; | |
625 | ||
0d0fa7c3 | 626 | if (git_vector_init(&ref_list, 8, NULL) < 0) |
45d387ac | 627 | return -1; |
7ad96e51 | 628 | |
45d387ac | 629 | if (git_reference_foreach( |
1a481123 | 630 | repo, list_flags, &cb__reflist_add, (void *)&ref_list) < 0) { |
09e8de0f | 631 | git_vector_free(&ref_list); |
45d387ac | 632 | return -1; |
7ad96e51 VM |
633 | } |
634 | ||
09e8de0f VM |
635 | array->strings = (char **)ref_list.contents; |
636 | array->count = ref_list.length; | |
1a481123 | 637 | return 0; |
00571828 | 638 | } |
87d3acf4 | 639 | |
d4a0b124 | 640 | static int is_valid_ref_char(char ch) |
aa2120e9 | 641 | { |
50a8fd03 | 642 | if ((unsigned) ch <= ' ') |
d4a0b124 | 643 | return 0; |
aa2120e9 | 644 | |
645 | switch (ch) { | |
646 | case '~': | |
647 | case '^': | |
648 | case ':': | |
649 | case '\\': | |
650 | case '?': | |
651 | case '[': | |
e1be1028 | 652 | case '*': |
d4a0b124 | 653 | return 0; |
aa2120e9 | 654 | default: |
d4a0b124 | 655 | return 1; |
aa2120e9 | 656 | } |
657 | } | |
658 | ||
c030ada7 | 659 | static int ensure_segment_validity(const char *name) |
aa2120e9 | 660 | { |
c030ada7 | 661 | const char *current = name; |
662 | char prev = '\0'; | |
0d1b094b RB |
663 | const int lock_len = (int)strlen(GIT_FILELOCK_EXTENSION); |
664 | int segment_len; | |
aa2120e9 | 665 | |
c030ada7 | 666 | if (*current == '.') |
667 | return -1; /* Refname starts with "." */ | |
aa2120e9 | 668 | |
c030ada7 | 669 | for (current = name; ; current++) { |
670 | if (*current == '\0' || *current == '/') | |
671 | break; | |
2e0c8816 | 672 | |
c030ada7 | 673 | if (!is_valid_ref_char(*current)) |
674 | return -1; /* Illegal character in refname */ | |
aa2120e9 | 675 | |
c030ada7 | 676 | if (prev == '.' && *current == '.') |
677 | return -1; /* Refname contains ".." */ | |
3101a3e5 | 678 | |
c030ada7 | 679 | if (prev == '@' && *current == '{') |
680 | return -1; /* Refname contains "@{" */ | |
aa2120e9 | 681 | |
c030ada7 | 682 | prev = *current; |
683 | } | |
aa2120e9 | 684 | |
0d1b094b RB |
685 | segment_len = (int)(current - name); |
686 | ||
4d811c3b | 687 | /* A refname component can not end with ".lock" */ |
0d1b094b | 688 | if (segment_len >= lock_len && |
2bca5b67 | 689 | !memcmp(current - lock_len, GIT_FILELOCK_EXTENSION, lock_len)) |
4d811c3b | 690 | return -1; |
691 | ||
0d1b094b | 692 | return segment_len; |
c030ada7 | 693 | } |
aa2120e9 | 694 | |
7c411fd9 | 695 | static bool is_all_caps_and_underscore(const char *name, size_t len) |
77e06d7e | 696 | { |
7c411fd9 | 697 | size_t i; |
77e06d7e | 698 | char c; |
699 | ||
700 | assert(name && len > 0); | |
701 | ||
702 | for (i = 0; i < len; i++) | |
703 | { | |
704 | c = name[i]; | |
705 | if ((c < 'A' || c > 'Z') && c != '_') | |
706 | return false; | |
707 | } | |
708 | ||
709 | if (*name == '_' || name[len - 1] == '_') | |
710 | return false; | |
711 | ||
712 | return true; | |
713 | } | |
714 | ||
c030ada7 | 715 | int git_reference__normalize_name( |
716 | git_buf *buf, | |
717 | const char *name, | |
718 | unsigned int flags) | |
719 | { | |
720 | // Inspired from https://github.com/git/git/blob/f06d47e7e0d9db709ee204ed13a8a7486149f494/refs.c#L36-100 | |
721 | ||
722 | char *current; | |
80d9d1df | 723 | int segment_len, segments_count = 0, error = GIT_EINVALIDSPEC; |
77e06d7e | 724 | unsigned int process_flags; |
725 | bool normalize = (buf != NULL); | |
726 | assert(name); | |
c030ada7 | 727 | |
77e06d7e | 728 | process_flags = flags; |
c030ada7 | 729 | current = (char *)name; |
730 | ||
bb45c57f CMN |
731 | if (*current == '/') |
732 | goto cleanup; | |
733 | ||
77e06d7e | 734 | if (normalize) |
735 | git_buf_clear(buf); | |
c030ada7 | 736 | |
737 | while (true) { | |
738 | segment_len = ensure_segment_validity(current); | |
739 | if (segment_len < 0) { | |
77e06d7e | 740 | if ((process_flags & GIT_REF_FORMAT_REFSPEC_PATTERN) && |
c030ada7 | 741 | current[0] == '*' && |
742 | (current[1] == '\0' || current[1] == '/')) { | |
743 | /* Accept one wildcard as a full refname component. */ | |
77e06d7e | 744 | process_flags &= ~GIT_REF_FORMAT_REFSPEC_PATTERN; |
c030ada7 | 745 | segment_len = 1; |
746 | } else | |
747 | goto cleanup; | |
748 | } | |
aa2120e9 | 749 | |
c030ada7 | 750 | if (segment_len > 0) { |
77e06d7e | 751 | if (normalize) { |
7c411fd9 | 752 | size_t cur_len = git_buf_len(buf); |
aa2120e9 | 753 | |
77e06d7e | 754 | git_buf_joinpath(buf, git_buf_cstr(buf), current); |
7c411fd9 | 755 | git_buf_truncate(buf, |
77e06d7e | 756 | cur_len + segment_len + (segments_count ? 1 : 0)); |
aa2120e9 | 757 | |
80d9d1df | 758 | if (git_buf_oom(buf)) { |
759 | error = -1; | |
77e06d7e | 760 | goto cleanup; |
80d9d1df | 761 | } |
77e06d7e | 762 | } |
aa2120e9 | 763 | |
77e06d7e | 764 | segments_count++; |
0844ed06 | 765 | } |
2e0c8816 | 766 | |
2bca5b67 | 767 | /* No empty segment is allowed when not normalizing */ |
768 | if (segment_len == 0 && !normalize) | |
e5ef0f18 | 769 | goto cleanup; |
0d1b094b | 770 | |
c030ada7 | 771 | if (current[segment_len] == '\0') |
772 | break; | |
aa2120e9 | 773 | |
c030ada7 | 774 | current += segment_len + 1; |
2e0c8816 | 775 | } |
3101a3e5 | 776 | |
c030ada7 | 777 | /* A refname can not be empty */ |
77e06d7e | 778 | if (segment_len == 0 && segments_count == 0) |
c030ada7 | 779 | goto cleanup; |
780 | ||
781 | /* A refname can not end with "." */ | |
782 | if (current[segment_len - 1] == '.') | |
783 | goto cleanup; | |
784 | ||
785 | /* A refname can not end with "/" */ | |
786 | if (current[segment_len - 1] == '/') | |
787 | goto cleanup; | |
788 | ||
77e06d7e | 789 | if ((segments_count == 1 ) && !(flags & GIT_REF_FORMAT_ALLOW_ONELEVEL)) |
790 | goto cleanup; | |
791 | ||
792 | if ((segments_count == 1 ) && | |
528a4e24 | 793 | !(flags & GIT_REF_FORMAT_REFSPEC_SHORTHAND) && |
7c411fd9 | 794 | !(is_all_caps_and_underscore(name, (size_t)segment_len) || |
77e06d7e | 795 | ((flags & GIT_REF_FORMAT_REFSPEC_PATTERN) && !strcmp("*", name)))) |
796 | goto cleanup; | |
797 | ||
798 | if ((segments_count > 1) | |
799 | && (is_all_caps_and_underscore(name, strchr(name, '/') - name))) | |
800 | goto cleanup; | |
aa2120e9 | 801 | |
c030ada7 | 802 | error = 0; |
aa2120e9 | 803 | |
c030ada7 | 804 | cleanup: |
80d9d1df | 805 | if (error == GIT_EINVALIDSPEC) |
c030ada7 | 806 | giterr_set( |
807 | GITERR_REFERENCE, | |
808 | "The given reference name '%s' is not valid", name); | |
aa2120e9 | 809 | |
3865f7f6 RB |
810 | if (error && normalize) |
811 | git_buf_free(buf); | |
812 | ||
c030ada7 | 813 | return error; |
814 | } | |
1a481123 | 815 | |
c030ada7 | 816 | int git_reference_normalize_name( |
817 | char *buffer_out, | |
818 | size_t buffer_size, | |
819 | const char *name, | |
820 | unsigned int flags) | |
821 | { | |
822 | git_buf buf = GIT_BUF_INIT; | |
823 | int error; | |
824 | ||
825 | if ((error = git_reference__normalize_name(&buf, name, flags)) < 0) | |
826 | goto cleanup; | |
827 | ||
828 | if (git_buf_len(&buf) > buffer_size - 1) { | |
829 | giterr_set( | |
2e0c8816 | 830 | GITERR_REFERENCE, |
c030ada7 | 831 | "The provided buffer is too short to hold the normalization of '%s'", name); |
832 | error = GIT_EBUFS; | |
833 | goto cleanup; | |
834 | } | |
835 | ||
836 | git_buf_copy_cstr(buffer_out, buffer_size, &buf); | |
837 | ||
838 | error = 0; | |
839 | ||
840 | cleanup: | |
841 | git_buf_free(&buf); | |
842 | return error; | |
aa2120e9 | 843 | } |
2f8a8ab2 | 844 | |
c030ada7 | 845 | int git_reference__normalize_name_lax( |
d4a0b124 VM |
846 | char *buffer_out, |
847 | size_t out_size, | |
848 | const char *name) | |
86194b24 | 849 | { |
2e0c8816 | 850 | return git_reference_normalize_name( |
851 | buffer_out, | |
852 | out_size, | |
853 | name, | |
854 | GIT_REF_FORMAT_ALLOW_ONELEVEL); | |
86194b24 | 855 | } |
f201d613 RB |
856 | #define GIT_REF_TYPEMASK (GIT_REF_OID | GIT_REF_SYMBOLIC) |
857 | ||
858 | int git_reference_cmp(git_reference *ref1, git_reference *ref2) | |
859 | { | |
3be933b1 | 860 | git_ref_t type1, type2; |
f201d613 RB |
861 | assert(ref1 && ref2); |
862 | ||
3be933b1 VM |
863 | type1 = git_reference_type(ref1); |
864 | type2 = git_reference_type(ref2); | |
865 | ||
f201d613 | 866 | /* let's put symbolic refs before OIDs */ |
3be933b1 VM |
867 | if (type1 != type2) |
868 | return (type1 == GIT_REF_SYMBOLIC) ? -1 : 1; | |
f201d613 | 869 | |
3be933b1 | 870 | if (type1 == GIT_REF_SYMBOLIC) |
f201d613 RB |
871 | return strcmp(ref1->target.symbolic, ref2->target.symbolic); |
872 | ||
b7f167da | 873 | return git_oid__cmp(&ref1->target.oid, &ref2->target.oid); |
f201d613 RB |
874 | } |
875 | ||
d00d5464 ET |
876 | static int reference__update_terminal( |
877 | git_repository *repo, | |
878 | const char *ref_name, | |
879 | const git_oid *oid, | |
880 | int nesting) | |
edebceff | 881 | { |
882 | git_reference *ref; | |
d00d5464 | 883 | int error = 0; |
edebceff | 884 | |
d00d5464 ET |
885 | if (nesting > MAX_NESTING_LEVEL) |
886 | return GIT_ENOTFOUND; | |
4dcd8780 | 887 | |
d00d5464 | 888 | error = git_reference_lookup(&ref, repo, ref_name); |
edebceff | 889 | |
d00d5464 ET |
890 | /* If we haven't found the reference at all, create a new reference. */ |
891 | if (error == GIT_ENOTFOUND) { | |
edebceff | 892 | giterr_clear(); |
d00d5464 | 893 | return git_reference_create(NULL, repo, ref_name, oid, 0); |
edebceff | 894 | } |
4dcd8780 | 895 | |
d00d5464 ET |
896 | if (error < 0) |
897 | return error; | |
4dcd8780 | 898 | |
d00d5464 | 899 | /* If the ref is a symbolic reference, follow its target. */ |
edebceff | 900 | if (git_reference_type(ref) == GIT_REF_SYMBOLIC) { |
d00d5464 ET |
901 | error = reference__update_terminal(repo, git_reference_symbolic_target(ref), oid, |
902 | nesting+1); | |
edebceff | 903 | git_reference_free(ref); |
d00d5464 ET |
904 | } else { |
905 | git_reference_free(ref); | |
906 | error = git_reference_create(NULL, repo, ref_name, oid, 1); | |
edebceff | 907 | } |
4dcd8780 | 908 | |
d00d5464 | 909 | return error; |
edebceff | 910 | } |
527ed554 | 911 | |
d00d5464 ET |
912 | /* |
913 | * Starting with the reference given by `ref_name`, follows symbolic | |
914 | * references until a direct reference is found and updated the OID | |
915 | * on that direct reference to `oid`. | |
916 | */ | |
917 | int git_reference__update_terminal( | |
918 | git_repository *repo, | |
919 | const char *ref_name, | |
920 | const git_oid *oid) | |
527ed554 | 921 | { |
d00d5464 | 922 | return reference__update_terminal(repo, ref_name, oid, 0); |
527ed554 | 923 | } |
924 | ||
925 | int git_reference_foreach_glob( | |
926 | git_repository *repo, | |
927 | const char *glob, | |
928 | unsigned int list_flags, | |
929 | int (*callback)( | |
930 | const char *reference_name, | |
931 | void *payload), | |
932 | void *payload) | |
933 | { | |
d00d5464 | 934 | git_refdb *refdb; |
527ed554 | 935 | |
936 | assert(repo && glob && callback); | |
937 | ||
d00d5464 | 938 | git_repository_refdb__weakptr(&refdb, repo); |
527ed554 | 939 | |
d00d5464 | 940 | return git_refdb_foreach_glob(refdb, glob, list_flags, callback, payload); |
527ed554 | 941 | } |
75261421 | 942 | |
943 | int git_reference_has_log( | |
944 | git_reference *ref) | |
945 | { | |
946 | git_buf path = GIT_BUF_INIT; | |
947 | int result; | |
948 | ||
949 | assert(ref); | |
950 | ||
d00d5464 ET |
951 | if (git_buf_join_n(&path, '/', 3, ref->db->repo->path_repository, |
952 | GIT_REFLOG_DIR, ref->name) < 0) | |
75261421 | 953 | return -1; |
954 | ||
955 | result = git_path_isfile(git_buf_cstr(&path)); | |
956 | git_buf_free(&path); | |
957 | ||
958 | return result; | |
959 | } | |
84f18e35 | 960 | |
bf031581 | 961 | int git_reference__is_branch(const char *ref_name) |
962 | { | |
963 | return git__prefixcmp(ref_name, GIT_REFS_HEADS_DIR) == 0; | |
964 | } | |
965 | ||
88bcd515 | 966 | int git_reference_is_branch(git_reference *ref) |
967 | { | |
968 | assert(ref); | |
bf031581 | 969 | return git_reference__is_branch(ref->name); |
88bcd515 | 970 | } |
1c947daa | 971 | |
c1b5e8c4 | 972 | int git_reference__is_remote(const char *ref_name) |
973 | { | |
974 | return git__prefixcmp(ref_name, GIT_REFS_REMOTES_DIR) == 0; | |
975 | } | |
976 | ||
1c947daa VM |
977 | int git_reference_is_remote(git_reference *ref) |
978 | { | |
979 | assert(ref); | |
c1b5e8c4 | 980 | return git_reference__is_remote(ref->name); |
1c947daa | 981 | } |
31665948 | 982 | |
983 | static int peel_error(int error, git_reference *ref, const char* msg) | |
984 | { | |
985 | giterr_set( | |
986 | GITERR_INVALID, | |
987 | "The reference '%s' cannot be peeled - %s", git_reference_name(ref), msg); | |
988 | return error; | |
989 | } | |
990 | ||
31665948 | 991 | int git_reference_peel( |
992 | git_object **peeled, | |
993 | git_reference *ref, | |
994 | git_otype target_type) | |
995 | { | |
996 | git_reference *resolved = NULL; | |
997 | git_object *target = NULL; | |
998 | int error; | |
999 | ||
1000 | assert(ref); | |
1001 | ||
3be933b1 VM |
1002 | if (ref->type == GIT_REF_OID) { |
1003 | resolved = ref; | |
1004 | } else { | |
1005 | if ((error = git_reference_resolve(&resolved, ref)) < 0) | |
1006 | return peel_error(error, ref, "Cannot resolve reference"); | |
1007 | } | |
1008 | ||
fedd0f9e | 1009 | if (!git_oid_iszero(&resolved->peel)) { |
3be933b1 | 1010 | error = git_object_lookup(&target, |
fedd0f9e | 1011 | git_reference_owner(ref), &resolved->peel, GIT_OBJ_ANY); |
3be933b1 VM |
1012 | } else { |
1013 | error = git_object_lookup(&target, | |
fedd0f9e | 1014 | git_reference_owner(ref), &resolved->target.oid, GIT_OBJ_ANY); |
3be933b1 | 1015 | } |
31665948 | 1016 | |
3be933b1 | 1017 | if (error < 0) { |
31665948 | 1018 | peel_error(error, ref, "Cannot retrieve reference target"); |
1019 | goto cleanup; | |
1020 | } | |
b90500f0 | 1021 | |
31665948 | 1022 | if (target_type == GIT_OBJ_ANY && git_object_type(target) != GIT_OBJ_TAG) |
575a54db | 1023 | error = git_object_dup(peeled, target); |
b90500f0 | 1024 | else |
31665948 | 1025 | error = git_object_peel(peeled, target, target_type); |
1026 | ||
1027 | cleanup: | |
1028 | git_object_free(target); | |
3be933b1 VM |
1029 | |
1030 | if (resolved != ref) | |
1031 | git_reference_free(resolved); | |
1032 | ||
31665948 | 1033 | return error; |
1034 | } | |
77e06d7e | 1035 | |
0adfa20a | 1036 | int git_reference__is_valid_name( |
1037 | const char *refname, | |
1038 | unsigned int flags) | |
1039 | { | |
83458bb7 | 1040 | int error; |
1041 | ||
1042 | error = git_reference__normalize_name(NULL, refname, flags) == 0; | |
0adfa20a | 1043 | giterr_clear(); |
83458bb7 | 1044 | |
1045 | return error; | |
0adfa20a | 1046 | } |
1047 | ||
77e06d7e | 1048 | int git_reference_is_valid_name( |
1049 | const char *refname) | |
1050 | { | |
0adfa20a | 1051 | return git_reference__is_valid_name( |
77e06d7e | 1052 | refname, |
0adfa20a | 1053 | GIT_REF_FORMAT_ALLOW_ONELEVEL); |
77e06d7e | 1054 | } |