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0fcfd160 LT |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * | |
6 | * This handles basic git sha1 object files - packing, unpacking, | |
7 | * creation etc. | |
8 | */ | |
0fcfd160 | 9 | #include "cache.h" |
b2141fc1 | 10 | #include "config.h" |
6eac50d8 | 11 | #include "string-list.h" |
697cc8ef | 12 | #include "lockfile.h" |
1f688557 | 13 | #include "delta.h" |
a733cb60 | 14 | #include "pack.h" |
8e440259 PE |
15 | #include "blob.h" |
16 | #include "commit.h" | |
4dd1fbc7 | 17 | #include "run-command.h" |
8e440259 PE |
18 | #include "tag.h" |
19 | #include "tree.h" | |
c879daa2 | 20 | #include "tree-walk.h" |
f35a6d3b | 21 | #include "refs.h" |
70f5d5d3 | 22 | #include "pack-revindex.h" |
628522ec | 23 | #include "sha1-lookup.h" |
568508e7 | 24 | #include "bulk-checkin.h" |
031dc927 | 25 | #include "repository.h" |
47f351e9 | 26 | #include "replace-object.h" |
090ea126 | 27 | #include "streaming.h" |
543c5caa | 28 | #include "dir.h" |
12d95ef6 | 29 | #include "list.h" |
c4c6effa | 30 | #include "mergesort.h" |
cf3c6352 | 31 | #include "quote.h" |
4f39cd82 | 32 | #include "packfile.h" |
90c62155 | 33 | #include "object-store.h" |
b14ed5ad | 34 | #include "promisor-remote.h" |
e05db0fd | 35 | |
1af64f73 | 36 | /* The maximum size for an object header. */ |
37 | #define MAX_HEADER_LEN 32 | |
38 | ||
e1ccd7e2 | 39 | |
40 | #define EMPTY_TREE_SHA1_BIN_LITERAL \ | |
41 | "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ | |
42 | "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" | |
13eeedb5 | 43 | #define EMPTY_TREE_SHA256_BIN_LITERAL \ |
44 | "\x6e\xf1\x9b\x41\x22\x5c\x53\x69\xf1\xc1" \ | |
45 | "\x04\xd4\x5d\x8d\x85\xef\xa9\xb0\x57\xb5" \ | |
46 | "\x3b\x14\xb4\xb9\xb9\x39\xdd\x74\xde\xcc" \ | |
47 | "\x53\x21" | |
e1ccd7e2 | 48 | |
49 | #define EMPTY_BLOB_SHA1_BIN_LITERAL \ | |
50 | "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ | |
51 | "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" | |
13eeedb5 | 52 | #define EMPTY_BLOB_SHA256_BIN_LITERAL \ |
53 | "\x47\x3a\x0f\x4c\x3b\xe8\xa9\x36\x81\xa2" \ | |
54 | "\x67\xe3\xb1\xe9\xa7\xdc\xda\x11\x85\x43" \ | |
55 | "\x6f\xe1\x41\xf7\x74\x91\x20\xa3\x03\x72" \ | |
56 | "\x18\x13" | |
e1ccd7e2 | 57 | |
50c5cd58 | 58 | const unsigned char null_sha1[GIT_MAX_RAWSZ]; |
3e56e724 | 59 | const struct object_id null_oid; |
e1ccd7e2 | 60 | static const struct object_id empty_tree_oid = { |
8576fde6 JK |
61 | EMPTY_TREE_SHA1_BIN_LITERAL |
62 | }; | |
e1ccd7e2 | 63 | static const struct object_id empty_blob_oid = { |
8576fde6 JK |
64 | EMPTY_BLOB_SHA1_BIN_LITERAL |
65 | }; | |
13eeedb5 | 66 | static const struct object_id empty_tree_oid_sha256 = { |
67 | EMPTY_TREE_SHA256_BIN_LITERAL | |
68 | }; | |
69 | static const struct object_id empty_blob_oid_sha256 = { | |
70 | EMPTY_BLOB_SHA256_BIN_LITERAL | |
71 | }; | |
88cd621d | 72 | |
ac73cedf | 73 | static void git_hash_sha1_init(git_hash_ctx *ctx) |
f50e766b | 74 | { |
ac73cedf | 75 | git_SHA1_Init(&ctx->sha1); |
f50e766b | 76 | } |
77 | ||
ac73cedf | 78 | static void git_hash_sha1_update(git_hash_ctx *ctx, const void *data, size_t len) |
f50e766b | 79 | { |
ac73cedf | 80 | git_SHA1_Update(&ctx->sha1, data, len); |
f50e766b | 81 | } |
82 | ||
ac73cedf | 83 | static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx) |
f50e766b | 84 | { |
ac73cedf | 85 | git_SHA1_Final(hash, &ctx->sha1); |
f50e766b | 86 | } |
87 | ||
13eeedb5 | 88 | |
89 | static void git_hash_sha256_init(git_hash_ctx *ctx) | |
90 | { | |
91 | git_SHA256_Init(&ctx->sha256); | |
92 | } | |
93 | ||
94 | static void git_hash_sha256_update(git_hash_ctx *ctx, const void *data, size_t len) | |
95 | { | |
96 | git_SHA256_Update(&ctx->sha256, data, len); | |
97 | } | |
98 | ||
99 | static void git_hash_sha256_final(unsigned char *hash, git_hash_ctx *ctx) | |
100 | { | |
101 | git_SHA256_Final(hash, &ctx->sha256); | |
102 | } | |
103 | ||
ac73cedf | 104 | static void git_hash_unknown_init(git_hash_ctx *ctx) |
f50e766b | 105 | { |
1a07e59c | 106 | BUG("trying to init unknown hash"); |
f50e766b | 107 | } |
108 | ||
ac73cedf | 109 | static void git_hash_unknown_update(git_hash_ctx *ctx, const void *data, size_t len) |
f50e766b | 110 | { |
1a07e59c | 111 | BUG("trying to update unknown hash"); |
f50e766b | 112 | } |
113 | ||
ac73cedf | 114 | static void git_hash_unknown_final(unsigned char *hash, git_hash_ctx *ctx) |
f50e766b | 115 | { |
1a07e59c | 116 | BUG("trying to finalize unknown hash"); |
f50e766b | 117 | } |
118 | ||
119 | const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { | |
120 | { | |
121 | NULL, | |
122 | 0x00000000, | |
123 | 0, | |
124 | 0, | |
a2ce0a75 | 125 | 0, |
f50e766b | 126 | git_hash_unknown_init, |
127 | git_hash_unknown_update, | |
128 | git_hash_unknown_final, | |
129 | NULL, | |
130 | NULL, | |
131 | }, | |
132 | { | |
1ccf07cb | 133 | "sha1", |
f50e766b | 134 | /* "sha1", big-endian */ |
135 | 0x73686131, | |
f50e766b | 136 | GIT_SHA1_RAWSZ, |
137 | GIT_SHA1_HEXSZ, | |
a2ce0a75 | 138 | GIT_SHA1_BLKSZ, |
f50e766b | 139 | git_hash_sha1_init, |
140 | git_hash_sha1_update, | |
141 | git_hash_sha1_final, | |
142 | &empty_tree_oid, | |
143 | &empty_blob_oid, | |
144 | }, | |
13eeedb5 | 145 | { |
146 | "sha256", | |
147 | /* "s256", big-endian */ | |
148 | 0x73323536, | |
149 | GIT_SHA256_RAWSZ, | |
150 | GIT_SHA256_HEXSZ, | |
151 | GIT_SHA256_BLKSZ, | |
152 | git_hash_sha256_init, | |
153 | git_hash_sha256_update, | |
154 | git_hash_sha256_final, | |
155 | &empty_tree_oid_sha256, | |
156 | &empty_blob_oid_sha256, | |
157 | } | |
f50e766b | 158 | }; |
159 | ||
d8a92ced | 160 | const char *empty_tree_oid_hex(void) |
161 | { | |
162 | static char buf[GIT_MAX_HEXSZ + 1]; | |
163 | return oid_to_hex_r(buf, the_hash_algo->empty_tree); | |
164 | } | |
165 | ||
166 | const char *empty_blob_oid_hex(void) | |
167 | { | |
168 | static char buf[GIT_MAX_HEXSZ + 1]; | |
169 | return oid_to_hex_r(buf, the_hash_algo->empty_blob); | |
170 | } | |
171 | ||
2f90b9d9 | 172 | int hash_algo_by_name(const char *name) |
173 | { | |
174 | int i; | |
175 | if (!name) | |
176 | return GIT_HASH_UNKNOWN; | |
177 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
178 | if (!strcmp(name, hash_algos[i].name)) | |
179 | return i; | |
180 | return GIT_HASH_UNKNOWN; | |
181 | } | |
182 | ||
183 | int hash_algo_by_id(uint32_t format_id) | |
184 | { | |
185 | int i; | |
186 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
187 | if (format_id == hash_algos[i].format_id) | |
188 | return i; | |
189 | return GIT_HASH_UNKNOWN; | |
190 | } | |
191 | ||
95399788 | 192 | int hash_algo_by_length(int len) |
193 | { | |
194 | int i; | |
195 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
196 | if (len == hash_algos[i].rawsz) | |
197 | return i; | |
198 | return GIT_HASH_UNKNOWN; | |
199 | } | |
2f90b9d9 | 200 | |
c597ba80 NTND |
201 | /* |
202 | * This is meant to hold a *small* number of objects that you would | |
cb1c8d1d | 203 | * want read_object_file() to be able to return, but yet you do not want |
c597ba80 NTND |
204 | * to write them into the object store (e.g. a browse-only |
205 | * application). | |
206 | */ | |
207 | static struct cached_object { | |
62ba93ea | 208 | struct object_id oid; |
c597ba80 NTND |
209 | enum object_type type; |
210 | void *buf; | |
211 | unsigned long size; | |
212 | } *cached_objects; | |
213 | static int cached_object_nr, cached_object_alloc; | |
214 | ||
215 | static struct cached_object empty_tree = { | |
62ba93ea | 216 | { EMPTY_TREE_SHA1_BIN_LITERAL }, |
c597ba80 NTND |
217 | OBJ_TREE, |
218 | "", | |
219 | 0 | |
220 | }; | |
221 | ||
62ba93ea | 222 | static struct cached_object *find_cached_object(const struct object_id *oid) |
c597ba80 NTND |
223 | { |
224 | int i; | |
225 | struct cached_object *co = cached_objects; | |
226 | ||
227 | for (i = 0; i < cached_object_nr; i++, co++) { | |
4a7e27e9 | 228 | if (oideq(&co->oid, oid)) |
c597ba80 NTND |
229 | return co; |
230 | } | |
4a7e27e9 | 231 | if (oideq(oid, the_hash_algo->empty_tree)) |
c597ba80 NTND |
232 | return &empty_tree; |
233 | return NULL; | |
234 | } | |
235 | ||
9472935d | 236 | |
8462ff43 | 237 | static int get_conv_flags(unsigned flags) |
9472935d TB |
238 | { |
239 | if (flags & HASH_RENORMALIZE) | |
8462ff43 | 240 | return CONV_EOL_RENORMALIZE; |
9472935d | 241 | else if (flags & HASH_WRITE_OBJECT) |
107642fe | 242 | return global_conv_flags_eol | CONV_WRITE_OBJECT; |
9472935d | 243 | else |
8462ff43 | 244 | return 0; |
9472935d TB |
245 | } |
246 | ||
247 | ||
90a6464b JH |
248 | int mkdir_in_gitdir(const char *path) |
249 | { | |
250 | if (mkdir(path, 0777)) { | |
251 | int saved_errno = errno; | |
252 | struct stat st; | |
253 | struct strbuf sb = STRBUF_INIT; | |
254 | ||
255 | if (errno != EEXIST) | |
256 | return -1; | |
257 | /* | |
258 | * Are we looking at a path in a symlinked worktree | |
259 | * whose original repository does not yet have it? | |
260 | * e.g. .git/rr-cache pointing at its original | |
261 | * repository in which the user hasn't performed any | |
262 | * conflict resolution yet? | |
263 | */ | |
264 | if (lstat(path, &st) || !S_ISLNK(st.st_mode) || | |
265 | strbuf_readlink(&sb, path, st.st_size) || | |
266 | !is_absolute_path(sb.buf) || | |
267 | mkdir(sb.buf, 0777)) { | |
268 | strbuf_release(&sb); | |
269 | errno = saved_errno; | |
270 | return -1; | |
271 | } | |
272 | strbuf_release(&sb); | |
273 | } | |
274 | return adjust_shared_perm(path); | |
275 | } | |
276 | ||
0be0521b | 277 | enum scld_error safe_create_leading_directories(char *path) |
b2cb9425 | 278 | { |
26c8ae2a | 279 | char *next_component = path + offset_1st_component(path); |
0be0521b | 280 | enum scld_error ret = SCLD_OK; |
67d42212 | 281 | |
0be0521b | 282 | while (ret == SCLD_OK && next_component) { |
f0502332 | 283 | struct stat st; |
0f527403 | 284 | char *slash = next_component, slash_character; |
f0502332 | 285 | |
0f527403 MH |
286 | while (*slash && !is_dir_sep(*slash)) |
287 | slash++; | |
288 | ||
289 | if (!*slash) | |
b2cb9425 | 290 | break; |
bf10cf70 | 291 | |
26c8ae2a | 292 | next_component = slash + 1; |
0f527403 | 293 | while (is_dir_sep(*next_component)) |
bf10cf70 | 294 | next_component++; |
26c8ae2a | 295 | if (!*next_component) |
5f0bdf50 | 296 | break; |
831651fd | 297 | |
0f527403 | 298 | slash_character = *slash; |
831651fd | 299 | *slash = '\0'; |
67d42212 JR |
300 | if (!stat(path, &st)) { |
301 | /* path exists */ | |
204a047f MH |
302 | if (!S_ISDIR(st.st_mode)) { |
303 | errno = ENOTDIR; | |
0be0521b | 304 | ret = SCLD_EXISTS; |
204a047f | 305 | } |
53a39721 | 306 | } else if (mkdir(path, 0777)) { |
928734d9 | 307 | if (errno == EEXIST && |
9e6f885d | 308 | !stat(path, &st) && S_ISDIR(st.st_mode)) |
928734d9 | 309 | ; /* somebody created it since we checked */ |
18d37e86 MH |
310 | else if (errno == ENOENT) |
311 | /* | |
312 | * Either mkdir() failed because | |
313 | * somebody just pruned the containing | |
314 | * directory, or stat() failed because | |
315 | * the file that was in our way was | |
316 | * just removed. Either way, inform | |
317 | * the caller that it might be worth | |
318 | * trying again: | |
319 | */ | |
320 | ret = SCLD_VANISHED; | |
9e6f885d | 321 | else |
0be0521b | 322 | ret = SCLD_FAILED; |
53a39721 | 323 | } else if (adjust_shared_perm(path)) { |
0be0521b | 324 | ret = SCLD_PERMS; |
457f06d6 | 325 | } |
0f527403 | 326 | *slash = slash_character; |
b2cb9425 | 327 | } |
9e6f885d | 328 | return ret; |
b2cb9425 | 329 | } |
723c31fe | 330 | |
0be0521b | 331 | enum scld_error safe_create_leading_directories_const(const char *path) |
8e21d63b | 332 | { |
02944307 | 333 | int save_errno; |
8e21d63b JK |
334 | /* path points to cache entries, so xstrdup before messing with it */ |
335 | char *buf = xstrdup(path); | |
0be0521b | 336 | enum scld_error result = safe_create_leading_directories(buf); |
02944307 MH |
337 | |
338 | save_errno = errno; | |
8e21d63b | 339 | free(buf); |
02944307 | 340 | errno = save_errno; |
8e21d63b JK |
341 | return result; |
342 | } | |
343 | ||
177978f5 MH |
344 | int raceproof_create_file(const char *path, create_file_fn fn, void *cb) |
345 | { | |
346 | /* | |
347 | * The number of times we will try to remove empty directories | |
348 | * in the way of path. This is only 1 because if another | |
349 | * process is racily creating directories that conflict with | |
350 | * us, we don't want to fight against them. | |
351 | */ | |
352 | int remove_directories_remaining = 1; | |
353 | ||
354 | /* | |
355 | * The number of times that we will try to create the | |
356 | * directories containing path. We are willing to attempt this | |
357 | * more than once, because another process could be trying to | |
358 | * clean up empty directories at the same time as we are | |
359 | * trying to create them. | |
360 | */ | |
361 | int create_directories_remaining = 3; | |
362 | ||
363 | /* A scratch copy of path, filled lazily if we need it: */ | |
364 | struct strbuf path_copy = STRBUF_INIT; | |
365 | ||
366 | int ret, save_errno; | |
367 | ||
368 | /* Sanity check: */ | |
369 | assert(*path); | |
370 | ||
371 | retry_fn: | |
372 | ret = fn(path, cb); | |
373 | save_errno = errno; | |
374 | if (!ret) | |
375 | goto out; | |
376 | ||
377 | if (errno == EISDIR && remove_directories_remaining-- > 0) { | |
378 | /* | |
379 | * A directory is in the way. Maybe it is empty; try | |
380 | * to remove it: | |
381 | */ | |
382 | if (!path_copy.len) | |
383 | strbuf_addstr(&path_copy, path); | |
384 | ||
385 | if (!remove_dir_recursively(&path_copy, REMOVE_DIR_EMPTY_ONLY)) | |
386 | goto retry_fn; | |
387 | } else if (errno == ENOENT && create_directories_remaining-- > 0) { | |
388 | /* | |
389 | * Maybe the containing directory didn't exist, or | |
390 | * maybe it was just deleted by a process that is | |
391 | * racing with us to clean up empty directories. Try | |
392 | * to create it: | |
393 | */ | |
394 | enum scld_error scld_result; | |
395 | ||
396 | if (!path_copy.len) | |
397 | strbuf_addstr(&path_copy, path); | |
398 | ||
399 | do { | |
400 | scld_result = safe_create_leading_directories(path_copy.buf); | |
401 | if (scld_result == SCLD_OK) | |
402 | goto retry_fn; | |
403 | } while (scld_result == SCLD_VANISHED && create_directories_remaining-- > 0); | |
404 | } | |
405 | ||
406 | out: | |
407 | strbuf_release(&path_copy); | |
408 | errno = save_errno; | |
409 | return ret; | |
410 | } | |
411 | ||
514c5fdd | 412 | static void fill_loose_path(struct strbuf *buf, const struct object_id *oid) |
ace1534d JH |
413 | { |
414 | int i; | |
94b5e093 | 415 | for (i = 0; i < the_hash_algo->rawsz; i++) { |
ace1534d | 416 | static char hex[] = "0123456789abcdef"; |
514c5fdd | 417 | unsigned int val = oid->hash[i]; |
f7b7774f JK |
418 | strbuf_addch(buf, hex[val >> 4]); |
419 | strbuf_addch(buf, hex[val & 0xf]); | |
afbba2f0 | 420 | if (!i) |
f7b7774f | 421 | strbuf_addch(buf, '/'); |
ace1534d JH |
422 | } |
423 | } | |
424 | ||
f0eaf638 JK |
425 | static const char *odb_loose_path(struct object_directory *odb, |
426 | struct strbuf *buf, | |
514c5fdd | 427 | const struct object_id *oid) |
0fcfd160 | 428 | { |
b69fb867 | 429 | strbuf_reset(buf); |
f0eaf638 | 430 | strbuf_addstr(buf, odb->path); |
34498471 | 431 | strbuf_addch(buf, '/'); |
514c5fdd | 432 | fill_loose_path(buf, oid); |
f3f043a1 | 433 | return buf->buf; |
0fcfd160 LT |
434 | } |
435 | ||
f3f043a1 | 436 | const char *loose_object_path(struct repository *r, struct strbuf *buf, |
514c5fdd | 437 | const struct object_id *oid) |
29ec6af2 | 438 | { |
514c5fdd | 439 | return odb_loose_path(r->objects->odb, buf, oid); |
0fcfd160 LT |
440 | } |
441 | ||
4ea82473 JK |
442 | /* |
443 | * Return non-zero iff the path is usable as an alternate object database. | |
444 | */ | |
13313fc3 SB |
445 | static int alt_odb_usable(struct raw_object_store *o, |
446 | struct strbuf *path, | |
447 | const char *normalized_objdir) | |
4ea82473 | 448 | { |
263db403 | 449 | struct object_directory *odb; |
4ea82473 JK |
450 | |
451 | /* Detect cases where alternate disappeared */ | |
452 | if (!is_directory(path->buf)) { | |
259328b7 NTND |
453 | error(_("object directory %s does not exist; " |
454 | "check .git/objects/info/alternates"), | |
4ea82473 JK |
455 | path->buf); |
456 | return 0; | |
457 | } | |
458 | ||
459 | /* | |
460 | * Prevent the common mistake of listing the same | |
461 | * thing twice, or object directory itself. | |
462 | */ | |
f0eaf638 | 463 | for (odb = o->odb; odb; odb = odb->next) { |
263db403 | 464 | if (!fspathcmp(path->buf, odb->path)) |
4ea82473 JK |
465 | return 0; |
466 | } | |
467 | if (!fspathcmp(path->buf, normalized_objdir)) | |
468 | return 0; | |
469 | ||
470 | return 1; | |
471 | } | |
472 | ||
ddd5d056 JH |
473 | /* |
474 | * Prepare alternate object database registry. | |
d5a63b99 JH |
475 | * |
476 | * The variable alt_odb_list points at the list of struct | |
263db403 | 477 | * object_directory. The elements on this list come from |
d5a63b99 JH |
478 | * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT |
479 | * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates, | |
1494e038 JH |
480 | * whose contents is similar to that environment variable but can be |
481 | * LF separated. Its base points at a statically allocated buffer that | |
d5a63b99 JH |
482 | * contains "/the/directory/corresponding/to/.git/objects/...", while |
483 | * its name points just after the slash at the end of ".git/objects/" | |
484 | * in the example above, and has enough space to hold 40-byte hex | |
485 | * SHA1, an extra slash for the first level indirection, and the | |
486 | * terminating NUL. | |
ddd5d056 | 487 | */ |
77f012e8 SB |
488 | static void read_info_alternates(struct repository *r, |
489 | const char *relative_base, | |
490 | int depth); | |
491 | static int link_alt_odb_entry(struct repository *r, const char *entry, | |
cfc62fc9 | 492 | const char *relative_base, int depth, const char *normalized_objdir) |
ace1534d | 493 | { |
263db403 | 494 | struct object_directory *ent; |
5bdf0a84 | 495 | struct strbuf pathbuf = STRBUF_INIT; |
d5a63b99 | 496 | |
85dadc38 | 497 | if (!is_absolute_path(entry) && relative_base) { |
4ac9006f | 498 | strbuf_realpath(&pathbuf, relative_base, 1); |
5bdf0a84 | 499 | strbuf_addch(&pathbuf, '/'); |
c2f493a4 | 500 | } |
6eac50d8 | 501 | strbuf_addstr(&pathbuf, entry); |
c2f493a4 | 502 | |
37a95862 | 503 | if (strbuf_normalize_path(&pathbuf) < 0 && relative_base) { |
259328b7 | 504 | error(_("unable to normalize alternate object path: %s"), |
670c359d JK |
505 | pathbuf.buf); |
506 | strbuf_release(&pathbuf); | |
507 | return -1; | |
508 | } | |
5bdf0a84 HW |
509 | |
510 | /* | |
511 | * The trailing slash after the directory name is given by | |
512 | * this function at the end. Remove duplicates. | |
513 | */ | |
4ea82473 JK |
514 | while (pathbuf.len && pathbuf.buf[pathbuf.len - 1] == '/') |
515 | strbuf_setlen(&pathbuf, pathbuf.len - 1); | |
5bdf0a84 | 516 | |
77f012e8 | 517 | if (!alt_odb_usable(r->objects, &pathbuf, normalized_objdir)) { |
4ea82473 | 518 | strbuf_release(&pathbuf); |
c2f493a4 MW |
519 | return -1; |
520 | } | |
521 | ||
f0eaf638 JK |
522 | ent = xcalloc(1, sizeof(*ent)); |
523 | ent->path = xstrdup(pathbuf.buf); | |
c2f493a4 MW |
524 | |
525 | /* add the alternate entry */ | |
f0eaf638 JK |
526 | *r->objects->odb_tail = ent; |
527 | r->objects->odb_tail = &(ent->next); | |
c2f493a4 MW |
528 | ent->next = NULL; |
529 | ||
530 | /* recursively add alternates */ | |
77f012e8 | 531 | read_info_alternates(r, pathbuf.buf, depth + 1); |
c2f493a4 | 532 | |
4ea82473 | 533 | strbuf_release(&pathbuf); |
c2f493a4 MW |
534 | return 0; |
535 | } | |
536 | ||
cf3c6352 JK |
537 | static const char *parse_alt_odb_entry(const char *string, |
538 | int sep, | |
539 | struct strbuf *out) | |
540 | { | |
541 | const char *end; | |
542 | ||
543 | strbuf_reset(out); | |
544 | ||
545 | if (*string == '#') { | |
546 | /* comment; consume up to next separator */ | |
547 | end = strchrnul(string, sep); | |
548 | } else if (*string == '"' && !unquote_c_style(out, string, &end)) { | |
549 | /* | |
550 | * quoted path; unquote_c_style has copied the | |
551 | * data for us and set "end". Broken quoting (e.g., | |
552 | * an entry that doesn't end with a quote) falls | |
553 | * back to the unquoted case below. | |
554 | */ | |
555 | } else { | |
556 | /* normal, unquoted path */ | |
557 | end = strchrnul(string, sep); | |
558 | strbuf_add(out, string, end - string); | |
559 | } | |
560 | ||
561 | if (*end) | |
562 | end++; | |
563 | return end; | |
564 | } | |
565 | ||
77f012e8 SB |
566 | static void link_alt_odb_entries(struct repository *r, const char *alt, |
567 | int sep, const char *relative_base, int depth) | |
c2f493a4 | 568 | { |
539e7506 | 569 | struct strbuf objdirbuf = STRBUF_INIT; |
cf3c6352 | 570 | struct strbuf entry = STRBUF_INIT; |
c2f493a4 | 571 | |
f28e3668 JK |
572 | if (!alt || !*alt) |
573 | return; | |
574 | ||
c2f493a4 | 575 | if (depth > 5) { |
259328b7 | 576 | error(_("%s: ignoring alternate object stores, nesting too deep"), |
c2f493a4 MW |
577 | relative_base); |
578 | return; | |
579 | } | |
580 | ||
f0eaf638 | 581 | strbuf_add_absolute_path(&objdirbuf, r->objects->odb->path); |
670c359d | 582 | if (strbuf_normalize_path(&objdirbuf) < 0) |
259328b7 | 583 | die(_("unable to normalize object directory: %s"), |
670c359d | 584 | objdirbuf.buf); |
539e7506 | 585 | |
cf3c6352 JK |
586 | while (*alt) { |
587 | alt = parse_alt_odb_entry(alt, sep, &entry); | |
588 | if (!entry.len) | |
9577e7e3 | 589 | continue; |
77f012e8 | 590 | link_alt_odb_entry(r, entry.buf, |
cfc62fc9 | 591 | relative_base, depth, objdirbuf.buf); |
9577e7e3 | 592 | } |
cf3c6352 | 593 | strbuf_release(&entry); |
539e7506 | 594 | strbuf_release(&objdirbuf); |
d5a63b99 JH |
595 | } |
596 | ||
77f012e8 SB |
597 | static void read_info_alternates(struct repository *r, |
598 | const char *relative_base, | |
599 | int depth) | |
d5a63b99 | 600 | { |
5015f01c | 601 | char *path; |
dc732bd5 | 602 | struct strbuf buf = STRBUF_INIT; |
d5a63b99 | 603 | |
5015f01c | 604 | path = xstrfmt("%s/info/alternates", relative_base); |
dc732bd5 | 605 | if (strbuf_read_file(&buf, path, 1024) < 0) { |
f0f7bebe | 606 | warn_on_fopen_errors(path); |
dc732bd5 | 607 | free(path); |
9a217f2a | 608 | return; |
ace1534d | 609 | } |
d5a63b99 | 610 | |
77f012e8 | 611 | link_alt_odb_entries(r, buf.buf, '\n', relative_base, depth); |
dc732bd5 JK |
612 | strbuf_release(&buf); |
613 | free(path); | |
ace1534d JH |
614 | } |
615 | ||
bef70b22 DB |
616 | void add_to_alternates_file(const char *reference) |
617 | { | |
f132a127 | 618 | struct lock_file lock = LOCK_INIT; |
77b9b1d1 JK |
619 | char *alts = git_pathdup("objects/info/alternates"); |
620 | FILE *in, *out; | |
f132a127 | 621 | int found = 0; |
77b9b1d1 | 622 | |
f132a127 MÅ |
623 | hold_lock_file_for_update(&lock, alts, LOCK_DIE_ON_ERROR); |
624 | out = fdopen_lock_file(&lock, "w"); | |
77b9b1d1 | 625 | if (!out) |
259328b7 | 626 | die_errno(_("unable to fdopen alternates lockfile")); |
77b9b1d1 JK |
627 | |
628 | in = fopen(alts, "r"); | |
629 | if (in) { | |
630 | struct strbuf line = STRBUF_INIT; | |
77b9b1d1 | 631 | |
3f163962 | 632 | while (strbuf_getline(&line, in) != EOF) { |
77b9b1d1 JK |
633 | if (!strcmp(reference, line.buf)) { |
634 | found = 1; | |
635 | break; | |
636 | } | |
637 | fprintf_or_die(out, "%s\n", line.buf); | |
638 | } | |
639 | ||
640 | strbuf_release(&line); | |
641 | fclose(in); | |
77b9b1d1 JK |
642 | } |
643 | else if (errno != ENOENT) | |
259328b7 | 644 | die_errno(_("unable to read alternates file")); |
77b9b1d1 | 645 | |
f132a127 MÅ |
646 | if (found) { |
647 | rollback_lock_file(&lock); | |
648 | } else { | |
77b9b1d1 | 649 | fprintf_or_die(out, "%s\n", reference); |
f132a127 | 650 | if (commit_lock_file(&lock)) |
259328b7 | 651 | die_errno(_("unable to move new alternates file into place")); |
f0eaf638 | 652 | if (the_repository->objects->loaded_alternates) |
93d8d1e2 SB |
653 | link_alt_odb_entries(the_repository, reference, |
654 | '\n', NULL, 0); | |
77b9b1d1 JK |
655 | } |
656 | free(alts); | |
bef70b22 DB |
657 | } |
658 | ||
a5b34d21 JK |
659 | void add_to_alternates_memory(const char *reference) |
660 | { | |
661 | /* | |
662 | * Make sure alternates are initialized, or else our entry may be | |
663 | * overwritten when they are. | |
664 | */ | |
0b209034 | 665 | prepare_alt_odb(the_repository); |
a5b34d21 | 666 | |
93d8d1e2 SB |
667 | link_alt_odb_entries(the_repository, reference, |
668 | '\n', NULL, 0); | |
a5b34d21 JK |
669 | } |
670 | ||
9eeea7d2 SB |
671 | /* |
672 | * Compute the exact path an alternate is at and returns it. In case of | |
673 | * error NULL is returned and the human readable error is added to `err` | |
efde7b72 | 674 | * `path` may be relative and should point to $GIT_DIR. |
9eeea7d2 SB |
675 | * `err` must not be null. |
676 | */ | |
677 | char *compute_alternate_path(const char *path, struct strbuf *err) | |
678 | { | |
679 | char *ref_git = NULL; | |
680 | const char *repo, *ref_git_s; | |
681 | int seen_error = 0; | |
682 | ||
683 | ref_git_s = real_path_if_valid(path); | |
684 | if (!ref_git_s) { | |
685 | seen_error = 1; | |
686 | strbuf_addf(err, _("path '%s' does not exist"), path); | |
687 | goto out; | |
688 | } else | |
689 | /* | |
690 | * Beware: read_gitfile(), real_path() and mkpath() | |
691 | * return static buffer | |
692 | */ | |
693 | ref_git = xstrdup(ref_git_s); | |
694 | ||
695 | repo = read_gitfile(ref_git); | |
696 | if (!repo) | |
697 | repo = read_gitfile(mkpath("%s/.git", ref_git)); | |
698 | if (repo) { | |
699 | free(ref_git); | |
700 | ref_git = xstrdup(repo); | |
701 | } | |
702 | ||
703 | if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) { | |
704 | char *ref_git_git = mkpathdup("%s/.git", ref_git); | |
705 | free(ref_git); | |
706 | ref_git = ref_git_git; | |
707 | } else if (!is_directory(mkpath("%s/objects", ref_git))) { | |
708 | struct strbuf sb = STRBUF_INIT; | |
709 | seen_error = 1; | |
710 | if (get_common_dir(&sb, ref_git)) { | |
711 | strbuf_addf(err, | |
712 | _("reference repository '%s' as a linked " | |
713 | "checkout is not supported yet."), | |
714 | path); | |
715 | goto out; | |
716 | } | |
717 | ||
718 | strbuf_addf(err, _("reference repository '%s' is not a " | |
719 | "local repository."), path); | |
720 | goto out; | |
721 | } | |
722 | ||
723 | if (!access(mkpath("%s/shallow", ref_git), F_OK)) { | |
724 | strbuf_addf(err, _("reference repository '%s' is shallow"), | |
725 | path); | |
726 | seen_error = 1; | |
727 | goto out; | |
728 | } | |
729 | ||
730 | if (!access(mkpath("%s/info/grafts", ref_git), F_OK)) { | |
731 | strbuf_addf(err, | |
732 | _("reference repository '%s' is grafted"), | |
733 | path); | |
734 | seen_error = 1; | |
735 | goto out; | |
736 | } | |
737 | ||
738 | out: | |
739 | if (seen_error) { | |
6a83d902 | 740 | FREE_AND_NULL(ref_git); |
9eeea7d2 SB |
741 | } |
742 | ||
743 | return ref_git; | |
744 | } | |
745 | ||
709dfa69 JK |
746 | static void fill_alternate_refs_command(struct child_process *cmd, |
747 | const char *repo_path) | |
748 | { | |
749 | const char *value; | |
750 | ||
751 | if (!git_config_get_value("core.alternateRefsCommand", &value)) { | |
752 | cmd->use_shell = 1; | |
753 | ||
754 | argv_array_push(&cmd->args, value); | |
755 | argv_array_push(&cmd->args, repo_path); | |
756 | } else { | |
757 | cmd->git_cmd = 1; | |
758 | ||
759 | argv_array_pushf(&cmd->args, "--git-dir=%s", repo_path); | |
760 | argv_array_push(&cmd->args, "for-each-ref"); | |
761 | argv_array_push(&cmd->args, "--format=%(objectname)"); | |
762 | ||
763 | if (!git_config_get_value("core.alternateRefsPrefixes", &value)) { | |
764 | argv_array_push(&cmd->args, "--"); | |
765 | argv_array_split(&cmd->args, value); | |
766 | } | |
767 | } | |
768 | ||
769 | cmd->env = local_repo_env; | |
770 | cmd->out = -1; | |
771 | } | |
772 | ||
773 | static void read_alternate_refs(const char *path, | |
774 | alternate_ref_fn *cb, | |
775 | void *data) | |
776 | { | |
777 | struct child_process cmd = CHILD_PROCESS_INIT; | |
778 | struct strbuf line = STRBUF_INIT; | |
779 | FILE *fh; | |
780 | ||
781 | fill_alternate_refs_command(&cmd, path); | |
782 | ||
783 | if (start_command(&cmd)) | |
784 | return; | |
785 | ||
786 | fh = xfdopen(cmd.out, "r"); | |
787 | while (strbuf_getline_lf(&line, fh) != EOF) { | |
788 | struct object_id oid; | |
789 | const char *p; | |
790 | ||
791 | if (parse_oid_hex(line.buf, &oid, &p) || *p) { | |
792 | warning(_("invalid line while parsing alternate refs: %s"), | |
793 | line.buf); | |
794 | break; | |
795 | } | |
796 | ||
797 | cb(&oid, data); | |
798 | } | |
799 | ||
800 | fclose(fh); | |
801 | finish_command(&cmd); | |
86ad3ea5 | 802 | strbuf_release(&line); |
709dfa69 JK |
803 | } |
804 | ||
805 | struct alternate_refs_data { | |
806 | alternate_ref_fn *fn; | |
807 | void *data; | |
808 | }; | |
809 | ||
810 | static int refs_from_alternate_cb(struct object_directory *e, | |
811 | void *data) | |
812 | { | |
813 | struct strbuf path = STRBUF_INIT; | |
814 | size_t base_len; | |
815 | struct alternate_refs_data *cb = data; | |
816 | ||
817 | if (!strbuf_realpath(&path, e->path, 0)) | |
818 | goto out; | |
819 | if (!strbuf_strip_suffix(&path, "/objects")) | |
820 | goto out; | |
821 | base_len = path.len; | |
822 | ||
823 | /* Is this a git repository with refs? */ | |
824 | strbuf_addstr(&path, "/refs"); | |
825 | if (!is_directory(path.buf)) | |
826 | goto out; | |
827 | strbuf_setlen(&path, base_len); | |
828 | ||
829 | read_alternate_refs(path.buf, cb->fn, cb->data); | |
830 | ||
831 | out: | |
832 | strbuf_release(&path); | |
833 | return 0; | |
834 | } | |
835 | ||
836 | void for_each_alternate_ref(alternate_ref_fn fn, void *data) | |
837 | { | |
838 | struct alternate_refs_data cb; | |
839 | cb.fn = fn; | |
840 | cb.data = data; | |
841 | foreach_alt_odb(refs_from_alternate_cb, &cb); | |
842 | } | |
843 | ||
fe1b2268 | 844 | int foreach_alt_odb(alt_odb_fn fn, void *cb) |
d79796bc | 845 | { |
263db403 | 846 | struct object_directory *ent; |
fe1b2268 | 847 | int r = 0; |
d79796bc | 848 | |
0b209034 | 849 | prepare_alt_odb(the_repository); |
f0eaf638 | 850 | for (ent = the_repository->objects->odb->next; ent; ent = ent->next) { |
fe1b2268 JK |
851 | r = fn(ent, cb); |
852 | if (r) | |
853 | break; | |
854 | } | |
855 | return r; | |
d79796bc JH |
856 | } |
857 | ||
13068bf0 | 858 | void prepare_alt_odb(struct repository *r) |
c2f493a4 | 859 | { |
f0eaf638 | 860 | if (r->objects->loaded_alternates) |
7dc24aa5 SP |
861 | return; |
862 | ||
13068bf0 | 863 | link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0); |
c2f493a4 | 864 | |
f0eaf638 JK |
865 | read_info_alternates(r, r->objects->odb->path, 0); |
866 | r->objects->loaded_alternates = 1; | |
c2f493a4 MW |
867 | } |
868 | ||
3096b2ec | 869 | /* Returns 1 if we have successfully freshened the file, 0 otherwise. */ |
33d4221c | 870 | static int freshen_file(const char *fn) |
ace1534d | 871 | { |
33d4221c JK |
872 | struct utimbuf t; |
873 | t.actime = t.modtime = time(NULL); | |
874 | return !utime(fn, &t); | |
0f4dc14a | 875 | } |
ace1534d | 876 | |
3096b2ec JK |
877 | /* |
878 | * All of the check_and_freshen functions return 1 if the file exists and was | |
879 | * freshened (if freshening was requested), 0 otherwise. If they return | |
880 | * 0, you should not assume that it is safe to skip a write of the object (it | |
881 | * either does not exist on disk, or has a stale mtime and may be subject to | |
882 | * pruning). | |
883 | */ | |
6a5e6f5e | 884 | int check_and_freshen_file(const char *fn, int freshen) |
33d4221c JK |
885 | { |
886 | if (access(fn, F_OK)) | |
887 | return 0; | |
3096b2ec | 888 | if (freshen && !freshen_file(fn)) |
33d4221c JK |
889 | return 0; |
890 | return 1; | |
891 | } | |
892 | ||
f0eaf638 JK |
893 | static int check_and_freshen_odb(struct object_directory *odb, |
894 | const struct object_id *oid, | |
895 | int freshen) | |
33d4221c | 896 | { |
f0eaf638 | 897 | static struct strbuf path = STRBUF_INIT; |
514c5fdd | 898 | odb_loose_path(odb, &path, oid); |
f0eaf638 JK |
899 | return check_and_freshen_file(path.buf, freshen); |
900 | } | |
ea657730 | 901 | |
f0eaf638 JK |
902 | static int check_and_freshen_local(const struct object_id *oid, int freshen) |
903 | { | |
904 | return check_and_freshen_odb(the_repository->objects->odb, oid, freshen); | |
33d4221c JK |
905 | } |
906 | ||
6862ebbf | 907 | static int check_and_freshen_nonlocal(const struct object_id *oid, int freshen) |
0f4dc14a | 908 | { |
263db403 | 909 | struct object_directory *odb; |
f3f043a1 | 910 | |
0b209034 | 911 | prepare_alt_odb(the_repository); |
f0eaf638 JK |
912 | for (odb = the_repository->objects->odb->next; odb; odb = odb->next) { |
913 | if (check_and_freshen_odb(odb, oid, freshen)) | |
c529d75a | 914 | return 1; |
ace1534d | 915 | } |
c529d75a | 916 | return 0; |
ace1534d JH |
917 | } |
918 | ||
6862ebbf | 919 | static int check_and_freshen(const struct object_id *oid, int freshen) |
33d4221c | 920 | { |
6862ebbf | 921 | return check_and_freshen_local(oid, freshen) || |
922 | check_and_freshen_nonlocal(oid, freshen); | |
33d4221c JK |
923 | } |
924 | ||
6862ebbf | 925 | int has_loose_object_nonlocal(const struct object_id *oid) |
33d4221c | 926 | { |
6862ebbf | 927 | return check_and_freshen_nonlocal(oid, 0); |
33d4221c JK |
928 | } |
929 | ||
6862ebbf | 930 | static int has_loose_object(const struct object_id *oid) |
0f4dc14a | 931 | { |
6862ebbf | 932 | return check_and_freshen(oid, 0); |
0f4dc14a BC |
933 | } |
934 | ||
02710228 SP |
935 | static void mmap_limit_check(size_t length) |
936 | { | |
937 | static size_t limit = 0; | |
938 | if (!limit) { | |
939 | limit = git_env_ulong("GIT_MMAP_LIMIT", 0); | |
940 | if (!limit) | |
941 | limit = SIZE_MAX; | |
942 | } | |
943 | if (length > limit) | |
259328b7 | 944 | die(_("attempting to mmap %"PRIuMAX" over limit %"PRIuMAX), |
02710228 SP |
945 | (uintmax_t)length, (uintmax_t)limit); |
946 | } | |
947 | ||
1570856b JK |
948 | void *xmmap_gently(void *start, size_t length, |
949 | int prot, int flags, int fd, off_t offset) | |
58ecbd5e | 950 | { |
02710228 SP |
951 | void *ret; |
952 | ||
953 | mmap_limit_check(length); | |
954 | ret = mmap(start, length, prot, flags, fd, offset); | |
9827d4c1 JK |
955 | if (ret == MAP_FAILED && !length) |
956 | ret = NULL; | |
58ecbd5e JN |
957 | return ret; |
958 | } | |
959 | ||
1570856b JK |
960 | void *xmmap(void *start, size_t length, |
961 | int prot, int flags, int fd, off_t offset) | |
962 | { | |
963 | void *ret = xmmap_gently(start, length, prot, flags, fd, offset); | |
964 | if (ret == MAP_FAILED) | |
259328b7 | 965 | die_errno(_("mmap failed")); |
1570856b JK |
966 | return ret; |
967 | } | |
968 | ||
88d0db55 | 969 | /* |
090ea126 | 970 | * With an in-core object data in "map", rehash it to make sure the |
cb1c8d1d JK |
971 | * object name actually matches "oid" to detect object corruption. |
972 | * With "map" == NULL, try reading the object named with "oid" using | |
090ea126 | 973 | * the streaming interface and rehash it to do the same. |
88d0db55 | 974 | */ |
17e65451 | 975 | int check_object_signature(const struct object_id *oid, void *map, |
976 | unsigned long size, const char *type) | |
88d0db55 | 977 | { |
f070facc | 978 | struct object_id real_oid; |
090ea126 NTND |
979 | enum object_type obj_type; |
980 | struct git_istream *st; | |
18e2588e | 981 | git_hash_ctx c; |
1af64f73 | 982 | char hdr[MAX_HEADER_LEN]; |
090ea126 | 983 | int hdrlen; |
88d0db55 | 984 | |
090ea126 | 985 | if (map) { |
f070facc | 986 | hash_object_file(map, size, type, &real_oid); |
9001dc2a | 987 | return !oideq(oid, &real_oid) ? -1 : 0; |
88d0db55 BC |
988 | } |
989 | ||
ef7b5195 | 990 | st = open_istream(oid, &obj_type, &size, NULL); |
090ea126 NTND |
991 | if (!st) |
992 | return -1; | |
88d0db55 | 993 | |
090ea126 | 994 | /* Generate the header */ |
ca473cef | 995 | hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(obj_type), (uintmax_t)size) + 1; |
88d0db55 | 996 | |
090ea126 | 997 | /* Sha1.. */ |
18e2588e | 998 | the_hash_algo->init_fn(&c); |
999 | the_hash_algo->update_fn(&c, hdr, hdrlen); | |
090ea126 NTND |
1000 | for (;;) { |
1001 | char buf[1024 * 16]; | |
1002 | ssize_t readlen = read_istream(st, buf, sizeof(buf)); | |
1f688557 | 1003 | |
f54fac53 JK |
1004 | if (readlen < 0) { |
1005 | close_istream(st); | |
1006 | return -1; | |
1007 | } | |
090ea126 NTND |
1008 | if (!readlen) |
1009 | break; | |
18e2588e | 1010 | the_hash_algo->update_fn(&c, buf, readlen); |
fa5fc15d | 1011 | } |
18e2588e | 1012 | the_hash_algo->final_fn(real_oid.hash, &c); |
090ea126 | 1013 | close_istream(st); |
9001dc2a | 1014 | return !oideq(oid, &real_oid) ? -1 : 0; |
fa5fc15d SP |
1015 | } |
1016 | ||
1b8ac5ea | 1017 | int git_open_cloexec(const char *name, int flags) |
a0788266 | 1018 | { |
1e3001a8 JH |
1019 | int fd; |
1020 | static int o_cloexec = O_CLOEXEC; | |
a0788266 | 1021 | |
1e3001a8 JH |
1022 | fd = open(name, flags | o_cloexec); |
1023 | if ((o_cloexec & O_CLOEXEC) && fd < 0 && errno == EINVAL) { | |
cd66ada0 | 1024 | /* Try again w/o O_CLOEXEC: the kernel might not support it */ |
1e3001a8 JH |
1025 | o_cloexec &= ~O_CLOEXEC; |
1026 | fd = open(name, flags | o_cloexec); | |
491a8dec | 1027 | } |
491a8dec | 1028 | |
9fb9495d | 1029 | #if defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC) |
491a8dec | 1030 | { |
1e3001a8 | 1031 | static int fd_cloexec = FD_CLOEXEC; |
a0788266 | 1032 | |
1e3001a8 JH |
1033 | if (!o_cloexec && 0 <= fd && fd_cloexec) { |
1034 | /* Opened w/o O_CLOEXEC? try with fcntl(2) to add it */ | |
9fb9495d EW |
1035 | int flags = fcntl(fd, F_GETFD); |
1036 | if (fcntl(fd, F_SETFD, flags | fd_cloexec)) | |
1e3001a8 | 1037 | fd_cloexec = 0; |
cd66ada0 | 1038 | } |
44d1c19e | 1039 | } |
a0788266 | 1040 | #endif |
1b8ac5ea | 1041 | return fd; |
a0788266 JS |
1042 | } |
1043 | ||
3cf8b462 | 1044 | /* |
514c5fdd | 1045 | * Find "oid" as a loose object in the local repository or in an alternate. |
771e7d57 JK |
1046 | * Returns 0 on success, negative on failure. |
1047 | * | |
1048 | * The "path" out-parameter will give the path of the object we found (if any). | |
1049 | * Note that it may point to static storage and is only valid until another | |
514c5fdd | 1050 | * call to stat_loose_object(). |
3cf8b462 | 1051 | */ |
514c5fdd JK |
1052 | static int stat_loose_object(struct repository *r, const struct object_id *oid, |
1053 | struct stat *st, const char **path) | |
1f688557 | 1054 | { |
263db403 | 1055 | struct object_directory *odb; |
ea657730 CC |
1056 | static struct strbuf buf = STRBUF_INIT; |
1057 | ||
d2607fa0 | 1058 | prepare_alt_odb(r); |
f0eaf638 | 1059 | for (odb = r->objects->odb; odb; odb = odb->next) { |
514c5fdd | 1060 | *path = odb_loose_path(odb, &buf, oid); |
771e7d57 | 1061 | if (!lstat(*path, st)) |
052fe5ea | 1062 | return 0; |
c7934306 SP |
1063 | } |
1064 | ||
3cf8b462 SP |
1065 | return -1; |
1066 | } | |
1067 | ||
771e7d57 | 1068 | /* |
514c5fdd | 1069 | * Like stat_loose_object(), but actually open the object and return the |
771e7d57 JK |
1070 | * descriptor. See the caveats on the "path" parameter above. |
1071 | */ | |
514c5fdd JK |
1072 | static int open_loose_object(struct repository *r, |
1073 | const struct object_id *oid, const char **path) | |
60bb8b14 | 1074 | { |
44d1c19e | 1075 | int fd; |
263db403 | 1076 | struct object_directory *odb; |
f0eaf638 | 1077 | int most_interesting_errno = ENOENT; |
ea657730 CC |
1078 | static struct strbuf buf = STRBUF_INIT; |
1079 | ||
ec7283e5 | 1080 | prepare_alt_odb(r); |
f0eaf638 | 1081 | for (odb = r->objects->odb; odb; odb = odb->next) { |
514c5fdd | 1082 | *path = odb_loose_path(odb, &buf, oid); |
771e7d57 | 1083 | fd = git_open(*path); |
44d1c19e LT |
1084 | if (fd >= 0) |
1085 | return fd; | |
f0eaf638 | 1086 | |
d6c8a05b JK |
1087 | if (most_interesting_errno == ENOENT) |
1088 | most_interesting_errno = errno; | |
03e79c88 | 1089 | } |
d6c8a05b | 1090 | errno = most_interesting_errno; |
44d1c19e | 1091 | return -1; |
1f688557 JH |
1092 | } |
1093 | ||
61c7711c | 1094 | static int quick_has_loose(struct repository *r, |
d7a24573 | 1095 | const struct object_id *oid) |
61c7711c | 1096 | { |
61c7711c JK |
1097 | struct object_directory *odb; |
1098 | ||
61c7711c JK |
1099 | prepare_alt_odb(r); |
1100 | for (odb = r->objects->odb; odb; odb = odb->next) { | |
d7a24573 | 1101 | if (oid_array_lookup(odb_loose_cache(odb, oid), oid) >= 0) |
61c7711c JK |
1102 | return 1; |
1103 | } | |
1104 | return 0; | |
1105 | } | |
1106 | ||
f6371f92 JK |
1107 | /* |
1108 | * Map the loose object at "path" if it is not NULL, or the path found by | |
514c5fdd | 1109 | * searching for a loose object named "oid". |
f6371f92 | 1110 | */ |
514c5fdd JK |
1111 | static void *map_loose_object_1(struct repository *r, const char *path, |
1112 | const struct object_id *oid, unsigned long *size) | |
27d69a46 | 1113 | { |
0fcfd160 | 1114 | void *map; |
144bde78 | 1115 | int fd; |
84dd81c1 | 1116 | |
f6371f92 JK |
1117 | if (path) |
1118 | fd = git_open(path); | |
8261e1f1 | 1119 | else |
514c5fdd | 1120 | fd = open_loose_object(r, oid, &path); |
44d1c19e LT |
1121 | map = NULL; |
1122 | if (fd >= 0) { | |
1123 | struct stat st; | |
1f688557 | 1124 | |
44d1c19e LT |
1125 | if (!fstat(fd, &st)) { |
1126 | *size = xsize_t(st.st_size); | |
33e42de0 MM |
1127 | if (!*size) { |
1128 | /* mmap() is forbidden on empty files */ | |
259328b7 | 1129 | error(_("object file %s is empty"), path); |
6881925e | 1130 | close(fd); |
33e42de0 MM |
1131 | return NULL; |
1132 | } | |
44d1c19e | 1133 | map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0); |
144bde78 | 1134 | } |
44d1c19e | 1135 | close(fd); |
74e34e1f | 1136 | } |
0fcfd160 | 1137 | return map; |
74e34e1f NP |
1138 | } |
1139 | ||
514c5fdd JK |
1140 | void *map_loose_object(struct repository *r, |
1141 | const struct object_id *oid, | |
1142 | unsigned long *size) | |
068f85e3 | 1143 | { |
514c5fdd | 1144 | return map_loose_object_1(r, NULL, oid, size); |
068f85e3 | 1145 | } |
1146 | ||
00a7760e JK |
1147 | static int unpack_loose_short_header(git_zstream *stream, |
1148 | unsigned char *map, unsigned long mapsize, | |
1149 | void *buffer, unsigned long bufsiz) | |
47fe3f6e | 1150 | { |
c4483576 LT |
1151 | /* Get the data stream */ |
1152 | memset(stream, 0, sizeof(*stream)); | |
1153 | stream->next_in = map; | |
1154 | stream->avail_in = mapsize; | |
1155 | stream->next_out = buffer; | |
93821bd9 | 1156 | stream->avail_out = bufsiz; |
47fe3f6e | 1157 | |
39c68542 | 1158 | git_inflate_init(stream); |
cc5c54e7 | 1159 | return git_inflate(stream, 0); |
9a217f2a JH |
1160 | } |
1161 | ||
00a7760e JK |
1162 | int unpack_loose_header(git_zstream *stream, |
1163 | unsigned char *map, unsigned long mapsize, | |
1164 | void *buffer, unsigned long bufsiz) | |
1f688557 | 1165 | { |
00a7760e JK |
1166 | int status = unpack_loose_short_header(stream, map, mapsize, |
1167 | buffer, bufsiz); | |
42873078 | 1168 | |
d21f8426 JH |
1169 | if (status < Z_OK) |
1170 | return status; | |
628522ec | 1171 | |
d21f8426 JH |
1172 | /* Make sure we have the terminating NUL */ |
1173 | if (!memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) | |
1174 | return -1; | |
1f688557 JH |
1175 | return 0; |
1176 | } | |
1177 | ||
00a7760e JK |
1178 | static int unpack_loose_header_to_strbuf(git_zstream *stream, unsigned char *map, |
1179 | unsigned long mapsize, void *buffer, | |
1180 | unsigned long bufsiz, struct strbuf *header) | |
d131b7af | 1181 | { |
46f03448 KN |
1182 | int status; |
1183 | ||
00a7760e | 1184 | status = unpack_loose_short_header(stream, map, mapsize, buffer, bufsiz); |
d21f8426 JH |
1185 | if (status < Z_OK) |
1186 | return -1; | |
d131b7af | 1187 | |
46f03448 KN |
1188 | /* |
1189 | * Check if entire header is unpacked in the first iteration. | |
d131b7af | 1190 | */ |
46f03448 KN |
1191 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) |
1192 | return 0; | |
d131b7af | 1193 | |
46f03448 KN |
1194 | /* |
1195 | * buffer[0..bufsiz] was not large enough. Copy the partial | |
1196 | * result out to header, and then append the result of further | |
1197 | * reading the stream. | |
1198 | */ | |
1199 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); | |
1200 | stream->next_out = buffer; | |
1201 | stream->avail_out = bufsiz; | |
d131b7af | 1202 | |
46f03448 KN |
1203 | do { |
1204 | status = git_inflate(stream, 0); | |
1205 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); | |
1206 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) | |
1207 | return 0; | |
1208 | stream->next_out = buffer; | |
1209 | stream->avail_out = bufsiz; | |
1210 | } while (status != Z_STREAM_END); | |
1211 | return -1; | |
d131b7af SP |
1212 | } |
1213 | ||
00a7760e JK |
1214 | static void *unpack_loose_rest(git_zstream *stream, |
1215 | void *buffer, unsigned long size, | |
1216 | const struct object_id *oid) | |
95099731 | 1217 | { |
5180cacc | 1218 | int bytes = strlen(buffer) + 1; |
3aee68aa | 1219 | unsigned char *buf = xmallocz(size); |
93821bd9 | 1220 | unsigned long n; |
7efbff75 | 1221 | int status = Z_OK; |
95099731 | 1222 | |
93821bd9 LT |
1223 | n = stream->total_out - bytes; |
1224 | if (n > size) | |
1225 | n = size; | |
1226 | memcpy(buf, (char *) buffer + bytes, n); | |
1227 | bytes = n; | |
456cdf6e LT |
1228 | if (bytes <= size) { |
1229 | /* | |
1230 | * The above condition must be (bytes <= size), not | |
1231 | * (bytes < size). In other words, even though we | |
ccf5ace0 | 1232 | * expect no more output and set avail_out to zero, |
456cdf6e LT |
1233 | * the input zlib stream may have bytes that express |
1234 | * "this concludes the stream", and we *do* want to | |
1235 | * eat that input. | |
1236 | * | |
1237 | * Otherwise we would not be able to test that we | |
1238 | * consumed all the input to reach the expected size; | |
1239 | * we also want to check that zlib tells us that all | |
1240 | * went well with status == Z_STREAM_END at the end. | |
1241 | */ | |
5180cacc LT |
1242 | stream->next_out = buf + bytes; |
1243 | stream->avail_out = size - bytes; | |
7efbff75 | 1244 | while (status == Z_OK) |
39c68542 | 1245 | status = git_inflate(stream, Z_FINISH); |
5180cacc | 1246 | } |
456cdf6e | 1247 | if (status == Z_STREAM_END && !stream->avail_in) { |
39c68542 | 1248 | git_inflate_end(stream); |
7efbff75 | 1249 | return buf; |
95099731 NTND |
1250 | } |
1251 | ||
7efbff75 | 1252 | if (status < 0) |
00a7760e | 1253 | error(_("corrupt loose object '%s'"), oid_to_hex(oid)); |
7efbff75 | 1254 | else if (stream->avail_in) |
259328b7 | 1255 | error(_("garbage at end of loose object '%s'"), |
00a7760e | 1256 | oid_to_hex(oid)); |
7efbff75 JH |
1257 | free(buf); |
1258 | return NULL; | |
95099731 NTND |
1259 | } |
1260 | ||
d40d535b | 1261 | /* |
5180cacc LT |
1262 | * We used to just use "sscanf()", but that's actually way |
1263 | * too permissive for what we want to check. So do an anal | |
1264 | * object header parse by hand. | |
d40d535b | 1265 | */ |
00a7760e JK |
1266 | static int parse_loose_header_extended(const char *hdr, struct object_info *oi, |
1267 | unsigned int flags) | |
1f688557 | 1268 | { |
46f03448 | 1269 | const char *type_buf = hdr; |
5180cacc | 1270 | unsigned long size; |
46f03448 | 1271 | int type, type_len = 0; |
43057304 | 1272 | |
5180cacc | 1273 | /* |
46f03448 | 1274 | * The type can be of any size but is followed by |
21666f1a | 1275 | * a space. |
5180cacc | 1276 | */ |
5180cacc LT |
1277 | for (;;) { |
1278 | char c = *hdr++; | |
d21f8426 JH |
1279 | if (!c) |
1280 | return -1; | |
5180cacc LT |
1281 | if (c == ' ') |
1282 | break; | |
46f03448 | 1283 | type_len++; |
5180cacc | 1284 | } |
1f688557 | 1285 | |
46f03448 | 1286 | type = type_from_string_gently(type_buf, type_len, 1); |
6ca32f47 BW |
1287 | if (oi->type_name) |
1288 | strbuf_add(oi->type_name, type_buf, type_len); | |
46f03448 KN |
1289 | /* |
1290 | * Set type to 0 if its an unknown object and | |
2e3a16b2 | 1291 | * we're obtaining the type using '--allow-unknown-type' |
46f03448 KN |
1292 | * option. |
1293 | */ | |
19fc5e84 | 1294 | if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE) && (type < 0)) |
46f03448 KN |
1295 | type = 0; |
1296 | else if (type < 0) | |
259328b7 | 1297 | die(_("invalid object type")); |
46f03448 KN |
1298 | if (oi->typep) |
1299 | *oi->typep = type; | |
5180cacc LT |
1300 | |
1301 | /* | |
1302 | * The length must follow immediately, and be in canonical | |
1303 | * decimal format (ie "010" is not valid). | |
1304 | */ | |
1305 | size = *hdr++ - '0'; | |
1306 | if (size > 9) | |
1307 | return -1; | |
1308 | if (size) { | |
1309 | for (;;) { | |
1310 | unsigned long c = *hdr - '0'; | |
1311 | if (c > 9) | |
1312 | break; | |
1313 | hdr++; | |
1314 | size = size * 10 + c; | |
1b1005d1 | 1315 | } |
c01f51cc | 1316 | } |
46f03448 KN |
1317 | |
1318 | if (oi->sizep) | |
1319 | *oi->sizep = size; | |
5180cacc LT |
1320 | |
1321 | /* | |
1322 | * The length must be followed by a zero byte | |
1323 | */ | |
46f03448 | 1324 | return *hdr ? -1 : type; |
1f688557 JH |
1325 | } |
1326 | ||
00a7760e | 1327 | int parse_loose_header(const char *hdr, unsigned long *sizep) |
bf592c50 | 1328 | { |
27b5c1a0 | 1329 | struct object_info oi = OBJECT_INFO_INIT; |
21666f1a | 1330 | |
46f03448 | 1331 | oi.sizep = sizep; |
00a7760e | 1332 | return parse_loose_header_extended(hdr, &oi, 0); |
bf592c50 DB |
1333 | } |
1334 | ||
514c5fdd JK |
1335 | static int loose_object_info(struct repository *r, |
1336 | const struct object_id *oid, | |
1337 | struct object_info *oi, int flags) | |
65c2e0c3 | 1338 | { |
46f03448 KN |
1339 | int status = 0; |
1340 | unsigned long mapsize; | |
65c2e0c3 | 1341 | void *map; |
ef49a7a0 | 1342 | git_zstream stream; |
1af64f73 | 1343 | char hdr[MAX_HEADER_LEN]; |
46f03448 | 1344 | struct strbuf hdrbuf = STRBUF_INIT; |
c84a1f3e | 1345 | unsigned long size_scratch; |
65c2e0c3 | 1346 | |
5d642e75 JK |
1347 | if (oi->delta_base_sha1) |
1348 | hashclr(oi->delta_base_sha1); | |
1349 | ||
052fe5ea JK |
1350 | /* |
1351 | * If we don't care about type or size, then we don't | |
4ef8d1dd JH |
1352 | * need to look inside the object at all. Note that we |
1353 | * do not optimize out the stat call, even if the | |
1354 | * caller doesn't care about the disk-size, since our | |
1355 | * return value implicitly indicates whether the | |
1356 | * object even exists. | |
052fe5ea | 1357 | */ |
6ca32f47 | 1358 | if (!oi->typep && !oi->type_name && !oi->sizep && !oi->contentp) { |
771e7d57 | 1359 | const char *path; |
4ef8d1dd | 1360 | struct stat st; |
61c7711c | 1361 | if (!oi->disk_sizep && (flags & OBJECT_INFO_QUICK)) |
d7a24573 | 1362 | return quick_has_loose(r, oid) ? 0 : -1; |
514c5fdd | 1363 | if (stat_loose_object(r, oid, &st, &path) < 0) |
4ef8d1dd JH |
1364 | return -1; |
1365 | if (oi->disk_sizep) | |
23c339c0 | 1366 | *oi->disk_sizep = st.st_size; |
052fe5ea JK |
1367 | return 0; |
1368 | } | |
1369 | ||
514c5fdd | 1370 | map = map_loose_object(r, oid, &mapsize); |
f0df4ed5 | 1371 | if (!map) |
dbea72a8 | 1372 | return -1; |
c84a1f3e JT |
1373 | |
1374 | if (!oi->sizep) | |
1375 | oi->sizep = &size_scratch; | |
1376 | ||
23c339c0 JK |
1377 | if (oi->disk_sizep) |
1378 | *oi->disk_sizep = mapsize; | |
19fc5e84 | 1379 | if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE)) { |
00a7760e | 1380 | if (unpack_loose_header_to_strbuf(&stream, map, mapsize, hdr, sizeof(hdr), &hdrbuf) < 0) |
259328b7 | 1381 | status = error(_("unable to unpack %s header with --allow-unknown-type"), |
514c5fdd | 1382 | oid_to_hex(oid)); |
00a7760e | 1383 | } else if (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) |
259328b7 | 1384 | status = error(_("unable to unpack %s header"), |
514c5fdd | 1385 | oid_to_hex(oid)); |
46f03448 KN |
1386 | if (status < 0) |
1387 | ; /* Do nothing */ | |
1388 | else if (hdrbuf.len) { | |
00a7760e | 1389 | if ((status = parse_loose_header_extended(hdrbuf.buf, oi, flags)) < 0) |
259328b7 | 1390 | status = error(_("unable to parse %s header with --allow-unknown-type"), |
514c5fdd | 1391 | oid_to_hex(oid)); |
00a7760e | 1392 | } else if ((status = parse_loose_header_extended(hdr, oi, flags)) < 0) |
514c5fdd | 1393 | status = error(_("unable to parse %s header"), oid_to_hex(oid)); |
c84a1f3e | 1394 | |
b3ea7dd3 | 1395 | if (status >= 0 && oi->contentp) { |
00a7760e JK |
1396 | *oi->contentp = unpack_loose_rest(&stream, hdr, |
1397 | *oi->sizep, oid); | |
b3ea7dd3 JK |
1398 | if (!*oi->contentp) { |
1399 | git_inflate_end(&stream); | |
1400 | status = -1; | |
1401 | } | |
1402 | } else | |
c84a1f3e JT |
1403 | git_inflate_end(&stream); |
1404 | ||
65c2e0c3 | 1405 | munmap(map, mapsize); |
46f03448 | 1406 | if (status && oi->typep) |
23c339c0 | 1407 | *oi->typep = status; |
c84a1f3e JT |
1408 | if (oi->sizep == &size_scratch) |
1409 | oi->sizep = NULL; | |
46f03448 | 1410 | strbuf_release(&hdrbuf); |
3ab0fb06 | 1411 | oi->whence = OI_LOOSE; |
93cff9a9 | 1412 | return (status < 0) ? status : 0; |
65c2e0c3 JH |
1413 | } |
1414 | ||
8b4c0103 JT |
1415 | int fetch_if_missing = 1; |
1416 | ||
9d98354f SB |
1417 | int oid_object_info_extended(struct repository *r, const struct object_id *oid, |
1418 | struct object_info *oi, unsigned flags) | |
f0df4ed5 | 1419 | { |
cd585e2a | 1420 | static struct object_info blank_oi = OBJECT_INFO_INIT; |
f0df4ed5 | 1421 | struct pack_entry e; |
5b086407 | 1422 | int rtype; |
b383a13c | 1423 | const struct object_id *real = oid; |
8b4c0103 | 1424 | int already_retried = 0; |
f0df4ed5 | 1425 | |
b383a13c | 1426 | if (flags & OBJECT_INFO_LOOKUP_REPLACE) |
9d98354f | 1427 | real = lookup_replace_object(r, oid); |
f0df4ed5 | 1428 | |
b383a13c | 1429 | if (is_null_oid(real)) |
87b5e236 JK |
1430 | return -1; |
1431 | ||
cd585e2a JT |
1432 | if (!oi) |
1433 | oi = &blank_oi; | |
1434 | ||
dfdd4afc | 1435 | if (!(flags & OBJECT_INFO_SKIP_CACHED)) { |
62ba93ea | 1436 | struct cached_object *co = find_cached_object(real); |
dfdd4afc JT |
1437 | if (co) { |
1438 | if (oi->typep) | |
1439 | *(oi->typep) = co->type; | |
1440 | if (oi->sizep) | |
1441 | *(oi->sizep) = co->size; | |
1442 | if (oi->disk_sizep) | |
1443 | *(oi->disk_sizep) = 0; | |
1444 | if (oi->delta_base_sha1) | |
1445 | hashclr(oi->delta_base_sha1); | |
6ca32f47 | 1446 | if (oi->type_name) |
debca9d2 | 1447 | strbuf_addstr(oi->type_name, type_name(co->type)); |
dfdd4afc JT |
1448 | if (oi->contentp) |
1449 | *oi->contentp = xmemdupz(co->buf, co->size); | |
1450 | oi->whence = OI_CACHED; | |
1451 | return 0; | |
1452 | } | |
c4d9986f NTND |
1453 | } |
1454 | ||
8b4c0103 | 1455 | while (1) { |
42c8ce1c | 1456 | if (find_pack_entry(r, real, &e)) |
8b4c0103 JT |
1457 | break; |
1458 | ||
024aa469 TI |
1459 | if (flags & OBJECT_INFO_IGNORE_LOOSE) |
1460 | return -1; | |
1461 | ||
ddd63e64 | 1462 | /* Most likely it's a loose object. */ |
514c5fdd | 1463 | if (!loose_object_info(r, real, oi, flags)) |
5b086407 | 1464 | return 0; |
ddd63e64 SG |
1465 | |
1466 | /* Not a loose object; someone else may have just packed it. */ | |
2b7750c9 | 1467 | if (!(flags & OBJECT_INFO_QUICK)) { |
9d98354f | 1468 | reprepare_packed_git(r); |
42c8ce1c | 1469 | if (find_pack_entry(r, real, &e)) |
2b7750c9 JT |
1470 | break; |
1471 | } | |
8b4c0103 JT |
1472 | |
1473 | /* Check if it is a missing object */ | |
b14ed5ad | 1474 | if (fetch_if_missing && has_promisor_remote() && |
0f4a4fb1 | 1475 | !already_retried && r == the_repository && |
31f5256c | 1476 | !(flags & OBJECT_INFO_SKIP_FETCH_OBJECT)) { |
8b4c0103 | 1477 | /* |
b14ed5ad CC |
1478 | * TODO Investigate checking promisor_remote_get_direct() |
1479 | * TODO return value and stopping on error here. | |
1480 | * TODO Pass a repository struct through | |
1481 | * promisor_remote_get_direct(), such that arbitrary | |
1482 | * repositories work. | |
8b4c0103 | 1483 | */ |
b14ed5ad | 1484 | promisor_remote_get_direct(r, real, 1); |
8b4c0103 JT |
1485 | already_retried = 1; |
1486 | continue; | |
dfdd4afc | 1487 | } |
8b4c0103 JT |
1488 | |
1489 | return -1; | |
f0df4ed5 | 1490 | } |
3d77d877 | 1491 | |
cd585e2a JT |
1492 | if (oi == &blank_oi) |
1493 | /* | |
1494 | * We know that the caller doesn't actually need the | |
1495 | * information below, so return early. | |
1496 | */ | |
1497 | return 0; | |
9d98354f | 1498 | rtype = packed_object_info(r, e.p, e.offset, oi); |
412916ee | 1499 | if (rtype < 0) { |
b383a13c | 1500 | mark_bad_packed_object(e.p, real->hash); |
9d98354f | 1501 | return oid_object_info_extended(r, real, oi, 0); |
3ab0fb06 | 1502 | } else if (oi->whence == OI_PACKED) { |
9a490590 JH |
1503 | oi->u.packed.offset = e.offset; |
1504 | oi->u.packed.pack = e.p; | |
1505 | oi->u.packed.is_delta = (rtype == OBJ_REF_DELTA || | |
1506 | rtype == OBJ_OFS_DELTA); | |
3d77d877 NP |
1507 | } |
1508 | ||
5b086407 | 1509 | return 0; |
f0df4ed5 JS |
1510 | } |
1511 | ||
3fc0dca9 | 1512 | /* returns enum object_type or negative */ |
9d98354f SB |
1513 | int oid_object_info(struct repository *r, |
1514 | const struct object_id *oid, | |
1515 | unsigned long *sizep) | |
9a490590 | 1516 | { |
5b086407 | 1517 | enum object_type type; |
27b5c1a0 | 1518 | struct object_info oi = OBJECT_INFO_INIT; |
9a490590 | 1519 | |
5b086407 | 1520 | oi.typep = &type; |
9a490590 | 1521 | oi.sizep = sizep; |
9d98354f SB |
1522 | if (oid_object_info_extended(r, oid, &oi, |
1523 | OBJECT_INFO_LOOKUP_REPLACE) < 0) | |
5b086407 JK |
1524 | return -1; |
1525 | return type; | |
9a490590 JH |
1526 | } |
1527 | ||
1b9b5c69 | 1528 | static void *read_object(struct repository *r, |
cba595ab | 1529 | const struct object_id *oid, enum object_type *type, |
f1d8130b JT |
1530 | unsigned long *size) |
1531 | { | |
1532 | struct object_info oi = OBJECT_INFO_INIT; | |
1533 | void *content; | |
1534 | oi.typep = type; | |
1535 | oi.sizep = size; | |
1536 | oi.contentp = &content; | |
1537 | ||
cba595ab | 1538 | if (oid_object_info_extended(r, oid, &oi, 0) < 0) |
f1d8130b JT |
1539 | return NULL; |
1540 | return content; | |
1541 | } | |
1542 | ||
829e5c3b PO |
1543 | int pretend_object_file(void *buf, unsigned long len, enum object_type type, |
1544 | struct object_id *oid) | |
d66b37bb JH |
1545 | { |
1546 | struct cached_object *co; | |
1547 | ||
169c9c01 | 1548 | hash_object_file(buf, len, type_name(type), oid); |
98374a07 | 1549 | if (has_object_file(oid) || find_cached_object(oid)) |
d66b37bb | 1550 | return 0; |
c7353967 | 1551 | ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc); |
d66b37bb JH |
1552 | co = &cached_objects[cached_object_nr++]; |
1553 | co->size = len; | |
21666f1a | 1554 | co->type = type; |
efa13f7b JH |
1555 | co->buf = xmalloc(len); |
1556 | memcpy(co->buf, buf, len); | |
62ba93ea | 1557 | oidcpy(&co->oid, oid); |
d66b37bb JH |
1558 | return 0; |
1559 | } | |
1560 | ||
b6c4cecc JH |
1561 | /* |
1562 | * This function dies on corrupt objects; the callers who want to | |
1563 | * deal with them should arrange to call read_object() and give error | |
1564 | * messages themselves. | |
1565 | */ | |
a3b72c89 SB |
1566 | void *read_object_file_extended(struct repository *r, |
1567 | const struct object_id *oid, | |
b4f5aca4 | 1568 | enum object_type *type, |
1569 | unsigned long *size, | |
1570 | int lookup_replace) | |
ac939109 | 1571 | { |
3ba7a065 | 1572 | void *data; |
b6c4cecc | 1573 | const struct packed_git *p; |
771e7d57 JK |
1574 | const char *path; |
1575 | struct stat st; | |
1f2e7cea | 1576 | const struct object_id *repl = lookup_replace ? |
a3b72c89 | 1577 | lookup_replace_object(r, oid) : oid; |
b6c4cecc | 1578 | |
3ba7a065 | 1579 | errno = 0; |
cba595ab | 1580 | data = read_object(r, repl, type, size); |
4bbf5a26 | 1581 | if (data) |
b6c4cecc | 1582 | return data; |
68095570 | 1583 | |
25f3af3f | 1584 | if (errno && errno != ENOENT) |
259328b7 | 1585 | die_errno(_("failed to read object %s"), oid_to_hex(oid)); |
3ba7a065 | 1586 | |
68095570 | 1587 | /* die if we replaced an object with one that does not exist */ |
b383a13c | 1588 | if (repl != oid) |
259328b7 | 1589 | die(_("replacement %s not found for %s"), |
b383a13c | 1590 | oid_to_hex(repl), oid_to_hex(oid)); |
68095570 | 1591 | |
cba595ab | 1592 | if (!stat_loose_object(r, repl, &st, &path)) |
259328b7 | 1593 | die(_("loose object %s (stored in %s) is corrupt"), |
b383a13c | 1594 | oid_to_hex(repl), path); |
68095570 | 1595 | |
a3b72c89 | 1596 | if ((p = has_packed_and_bad(r, repl->hash)) != NULL) |
259328b7 | 1597 | die(_("packed object %s (stored in %s) is corrupt"), |
b383a13c | 1598 | oid_to_hex(repl), p->pack_name); |
f5552aee | 1599 | |
b6c4cecc | 1600 | return NULL; |
ac939109 NP |
1601 | } |
1602 | ||
d3b4705a NTND |
1603 | void *read_object_with_reference(struct repository *r, |
1604 | const struct object_id *oid, | |
21666f1a | 1605 | const char *required_type_name, |
40469ee9 | 1606 | unsigned long *size, |
02f0547e | 1607 | struct object_id *actual_oid_return) |
f4913f91 | 1608 | { |
21666f1a | 1609 | enum object_type type, required_type; |
f4913f91 JH |
1610 | void *buffer; |
1611 | unsigned long isize; | |
02f0547e | 1612 | struct object_id actual_oid; |
f4913f91 | 1613 | |
21666f1a | 1614 | required_type = type_from_string(required_type_name); |
02f0547e | 1615 | oidcpy(&actual_oid, oid); |
40469ee9 JH |
1616 | while (1) { |
1617 | int ref_length = -1; | |
1618 | const char *ref_type = NULL; | |
f4913f91 | 1619 | |
d3b4705a | 1620 | buffer = repo_read_object_file(r, &actual_oid, &type, &isize); |
40469ee9 JH |
1621 | if (!buffer) |
1622 | return NULL; | |
21666f1a | 1623 | if (type == required_type) { |
40469ee9 | 1624 | *size = isize; |
02f0547e | 1625 | if (actual_oid_return) |
1626 | oidcpy(actual_oid_return, &actual_oid); | |
40469ee9 JH |
1627 | return buffer; |
1628 | } | |
1629 | /* Handle references */ | |
21666f1a | 1630 | else if (type == OBJ_COMMIT) |
40469ee9 | 1631 | ref_type = "tree "; |
21666f1a | 1632 | else if (type == OBJ_TAG) |
40469ee9 JH |
1633 | ref_type = "object "; |
1634 | else { | |
1635 | free(buffer); | |
1636 | return NULL; | |
1637 | } | |
1638 | ref_length = strlen(ref_type); | |
f4913f91 | 1639 | |
94b5e093 | 1640 | if (ref_length + the_hash_algo->hexsz > isize || |
50974ec9 | 1641 | memcmp(buffer, ref_type, ref_length) || |
02f0547e | 1642 | get_oid_hex((char *) buffer + ref_length, &actual_oid)) { |
40469ee9 JH |
1643 | free(buffer); |
1644 | return NULL; | |
1645 | } | |
1cf58e72 | 1646 | free(buffer); |
40469ee9 | 1647 | /* Now we have the ID of the referred-to object in |
02f0547e | 1648 | * actual_oid. Check again. */ |
f4913f91 | 1649 | } |
f4913f91 JH |
1650 | } |
1651 | ||
a09c985e PO |
1652 | static void write_object_file_prepare(const void *buf, unsigned long len, |
1653 | const char *type, struct object_id *oid, | |
1654 | char *hdr, int *hdrlen) | |
d410c0f5 | 1655 | { |
18e2588e | 1656 | git_hash_ctx c; |
d410c0f5 JH |
1657 | |
1658 | /* Generate the header */ | |
ca473cef | 1659 | *hdrlen = xsnprintf(hdr, *hdrlen, "%s %"PRIuMAX , type, (uintmax_t)len)+1; |
d410c0f5 JH |
1660 | |
1661 | /* Sha1.. */ | |
18e2588e | 1662 | the_hash_algo->init_fn(&c); |
1663 | the_hash_algo->update_fn(&c, hdr, *hdrlen); | |
1664 | the_hash_algo->update_fn(&c, buf, len); | |
0fd90dab | 1665 | the_hash_algo->final_fn(oid->hash, &c); |
d410c0f5 JH |
1666 | } |
1667 | ||
230f1322 | 1668 | /* |
5a688fe4 | 1669 | * Move the just written object into its final resting place. |
230f1322 | 1670 | */ |
cb5add58 | 1671 | int finalize_object_file(const char *tmpfile, const char *filename) |
230f1322 | 1672 | { |
e32c0a9c | 1673 | int ret = 0; |
5a688fe4 | 1674 | |
348df166 | 1675 | if (object_creation_mode == OBJECT_CREATION_USES_RENAMES) |
be66a6c4 JS |
1676 | goto try_rename; |
1677 | else if (link(tmpfile, filename)) | |
e32c0a9c | 1678 | ret = errno; |
7ebb6fca LT |
1679 | |
1680 | /* | |
1681 | * Coda hack - coda doesn't like cross-directory links, | |
1682 | * so we fall back to a rename, which will mean that it | |
1683 | * won't be able to check collisions, but that's not a | |
1684 | * big deal. | |
1685 | * | |
1686 | * The same holds for FAT formatted media. | |
1687 | * | |
3be1f18e | 1688 | * When this succeeds, we just return. We have nothing |
7ebb6fca LT |
1689 | * left to unlink. |
1690 | */ | |
1691 | if (ret && ret != EEXIST) { | |
be66a6c4 | 1692 | try_rename: |
7ebb6fca | 1693 | if (!rename(tmpfile, filename)) |
3be1f18e | 1694 | goto out; |
9e48b389 | 1695 | ret = errno; |
230f1322 | 1696 | } |
691f1a28 | 1697 | unlink_or_warn(tmpfile); |
230f1322 LT |
1698 | if (ret) { |
1699 | if (ret != EEXIST) { | |
2c319886 | 1700 | return error_errno(_("unable to write file %s"), filename); |
230f1322 LT |
1701 | } |
1702 | /* FIXME!!! Collision check here ? */ | |
1703 | } | |
1704 | ||
3be1f18e | 1705 | out: |
5256b006 | 1706 | if (adjust_shared_perm(filename)) |
259328b7 | 1707 | return error(_("unable to set permission to '%s'"), filename); |
230f1322 LT |
1708 | return 0; |
1709 | } | |
1710 | ||
4d548150 LT |
1711 | static int write_buffer(int fd, const void *buf, size_t len) |
1712 | { | |
d34cf19b | 1713 | if (write_in_full(fd, buf, len) < 0) |
259328b7 | 1714 | return error_errno(_("file write error")); |
4d548150 LT |
1715 | return 0; |
1716 | } | |
1717 | ||
f070facc PO |
1718 | int hash_object_file(const void *buf, unsigned long len, const char *type, |
1719 | struct object_id *oid) | |
abdc3fc8 | 1720 | { |
1af64f73 | 1721 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 1722 | int hdrlen = sizeof(hdr); |
a09c985e | 1723 | write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen); |
abdc3fc8 RS |
1724 | return 0; |
1725 | } | |
1726 | ||
e9039dd3 | 1727 | /* Finalize a file on disk, and close it. */ |
514c5fdd | 1728 | static void close_loose_object(int fd) |
e9039dd3 | 1729 | { |
aafe9fba | 1730 | if (fsync_object_files) |
76011357 | 1731 | fsync_or_die(fd, "loose object file"); |
e9039dd3 | 1732 | if (close(fd) != 0) |
76011357 | 1733 | die_errno(_("error when closing loose object file")); |
e9039dd3 LT |
1734 | } |
1735 | ||
5723fe7e LT |
1736 | /* Size of directory component, including the ending '/' */ |
1737 | static inline int directory_size(const char *filename) | |
1738 | { | |
1739 | const char *s = strrchr(filename, '/'); | |
1740 | if (!s) | |
1741 | return 0; | |
1742 | return s - filename + 1; | |
1743 | } | |
1744 | ||
1745 | /* | |
1746 | * This creates a temporary file in the same directory as the final | |
1747 | * 'filename' | |
1748 | * | |
1749 | * We want to avoid cross-directory filename renames, because those | |
1750 | * can have problems on various filesystems (FAT, NFS, Coda). | |
1751 | */ | |
d4b3d11a | 1752 | static int create_tmpfile(struct strbuf *tmp, const char *filename) |
5723fe7e LT |
1753 | { |
1754 | int fd, dirlen = directory_size(filename); | |
1755 | ||
d4b3d11a JK |
1756 | strbuf_reset(tmp); |
1757 | strbuf_add(tmp, filename, dirlen); | |
1758 | strbuf_addstr(tmp, "tmp_obj_XXXXXX"); | |
1759 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
cbacbf4e | 1760 | if (fd < 0 && dirlen && errno == ENOENT) { |
d4b3d11a JK |
1761 | /* |
1762 | * Make sure the directory exists; note that the contents | |
1763 | * of the buffer are undefined after mkstemp returns an | |
1764 | * error, so we have to rewrite the whole buffer from | |
1765 | * scratch. | |
1766 | */ | |
1767 | strbuf_reset(tmp); | |
1768 | strbuf_add(tmp, filename, dirlen - 1); | |
1769 | if (mkdir(tmp->buf, 0777) && errno != EEXIST) | |
b2476a60 | 1770 | return -1; |
d4b3d11a | 1771 | if (adjust_shared_perm(tmp->buf)) |
5723fe7e LT |
1772 | return -1; |
1773 | ||
1774 | /* Try again */ | |
d4b3d11a JK |
1775 | strbuf_addstr(tmp, "/tmp_obj_XXXXXX"); |
1776 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
5723fe7e LT |
1777 | } |
1778 | return fd; | |
1779 | } | |
1780 | ||
3fc7281f PO |
1781 | static int write_loose_object(const struct object_id *oid, char *hdr, |
1782 | int hdrlen, const void *buf, unsigned long len, | |
1783 | time_t mtime) | |
0fcfd160 | 1784 | { |
915308b1 | 1785 | int fd, ret; |
9892beba | 1786 | unsigned char compressed[4096]; |
ef49a7a0 | 1787 | git_zstream stream; |
18e2588e | 1788 | git_hash_ctx c; |
3fc7281f | 1789 | struct object_id parano_oid; |
d4b3d11a | 1790 | static struct strbuf tmp_file = STRBUF_INIT; |
ea657730 CC |
1791 | static struct strbuf filename = STRBUF_INIT; |
1792 | ||
514c5fdd | 1793 | loose_object_path(the_repository, &filename, oid); |
a44c9a5e | 1794 | |
ea657730 | 1795 | fd = create_tmpfile(&tmp_file, filename.buf); |
aac17941 | 1796 | if (fd < 0) { |
35243577 | 1797 | if (errno == EACCES) |
259328b7 | 1798 | return error(_("insufficient permission for adding an object to repository database %s"), get_object_directory()); |
916d081b | 1799 | else |
259328b7 | 1800 | return error_errno(_("unable to create temporary file")); |
aac17941 LT |
1801 | } |
1802 | ||
0fcfd160 | 1803 | /* Set it up */ |
55bb5c91 | 1804 | git_deflate_init(&stream, zlib_compression_level); |
0fcfd160 | 1805 | stream.next_out = compressed; |
9892beba | 1806 | stream.avail_out = sizeof(compressed); |
18e2588e | 1807 | the_hash_algo->init_fn(&c); |
a44c9a5e LT |
1808 | |
1809 | /* First header.. */ | |
d65a16f6 | 1810 | stream.next_in = (unsigned char *)hdr; |
a44c9a5e | 1811 | stream.avail_in = hdrlen; |
55bb5c91 JH |
1812 | while (git_deflate(&stream, 0) == Z_OK) |
1813 | ; /* nothing */ | |
18e2588e | 1814 | the_hash_algo->update_fn(&c, hdr, hdrlen); |
a44c9a5e LT |
1815 | |
1816 | /* Then the data itself.. */ | |
c00e657d | 1817 | stream.next_in = (void *)buf; |
a44c9a5e | 1818 | stream.avail_in = len; |
9892beba | 1819 | do { |
748af44c | 1820 | unsigned char *in0 = stream.next_in; |
55bb5c91 | 1821 | ret = git_deflate(&stream, Z_FINISH); |
18e2588e | 1822 | the_hash_algo->update_fn(&c, in0, stream.next_in - in0); |
9892beba | 1823 | if (write_buffer(fd, compressed, stream.next_out - compressed) < 0) |
76011357 | 1824 | die(_("unable to write loose object file")); |
9892beba NP |
1825 | stream.next_out = compressed; |
1826 | stream.avail_out = sizeof(compressed); | |
1827 | } while (ret == Z_OK); | |
1828 | ||
ac54c277 | 1829 | if (ret != Z_STREAM_END) |
259328b7 | 1830 | die(_("unable to deflate new object %s (%d)"), oid_to_hex(oid), |
3fc7281f | 1831 | ret); |
55bb5c91 | 1832 | ret = git_deflate_end_gently(&stream); |
ac54c277 | 1833 | if (ret != Z_OK) |
259328b7 | 1834 | die(_("deflateEnd on object %s failed (%d)"), oid_to_hex(oid), |
3fc7281f | 1835 | ret); |
18e2588e | 1836 | the_hash_algo->final_fn(parano_oid.hash, &c); |
9001dc2a | 1837 | if (!oideq(oid, ¶no_oid)) |
259328b7 | 1838 | die(_("confused by unstable object source data for %s"), |
3fc7281f | 1839 | oid_to_hex(oid)); |
ac54c277 | 1840 | |
514c5fdd | 1841 | close_loose_object(fd); |
0fcfd160 | 1842 | |
bbac7311 NP |
1843 | if (mtime) { |
1844 | struct utimbuf utb; | |
1845 | utb.actime = mtime; | |
1846 | utb.modtime = mtime; | |
d4b3d11a | 1847 | if (utime(tmp_file.buf, &utb) < 0) |
259328b7 | 1848 | warning_errno(_("failed utime() on %s"), tmp_file.buf); |
bbac7311 NP |
1849 | } |
1850 | ||
ea657730 | 1851 | return finalize_object_file(tmp_file.buf, filename.buf); |
0fcfd160 | 1852 | } |
8237b185 | 1853 | |
6862ebbf | 1854 | static int freshen_loose_object(const struct object_id *oid) |
33d4221c | 1855 | { |
6862ebbf | 1856 | return check_and_freshen(oid, 1); |
33d4221c JK |
1857 | } |
1858 | ||
6862ebbf | 1859 | static int freshen_packed_object(const struct object_id *oid) |
33d4221c JK |
1860 | { |
1861 | struct pack_entry e; | |
544443cb | 1862 | if (!find_pack_entry(the_repository, oid, &e)) |
ee1c6c34 JK |
1863 | return 0; |
1864 | if (e.p->freshened) | |
1865 | return 1; | |
1866 | if (!freshen_file(e.p->pack_name)) | |
1867 | return 0; | |
1868 | e.p->freshened = 1; | |
1869 | return 1; | |
33d4221c JK |
1870 | } |
1871 | ||
a09c985e PO |
1872 | int write_object_file(const void *buf, unsigned long len, const char *type, |
1873 | struct object_id *oid) | |
bbac7311 | 1874 | { |
1af64f73 | 1875 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 1876 | int hdrlen = sizeof(hdr); |
bbac7311 NP |
1877 | |
1878 | /* Normally if we have it in the pack then we do not bother writing | |
1879 | * it out into .git/objects/??/?{38} file. | |
1880 | */ | |
a09c985e | 1881 | write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen); |
6862ebbf | 1882 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
bbac7311 | 1883 | return 0; |
3fc7281f | 1884 | return write_loose_object(oid, hdr, hdrlen, buf, len, 0); |
bbac7311 NP |
1885 | } |
1886 | ||
1752cbbc PO |
1887 | int hash_object_file_literally(const void *buf, unsigned long len, |
1888 | const char *type, struct object_id *oid, | |
1889 | unsigned flags) | |
0c3db67c ES |
1890 | { |
1891 | char *header; | |
1892 | int hdrlen, status = 0; | |
1893 | ||
1894 | /* type string, SP, %lu of the length plus NUL must fit this */ | |
1af64f73 | 1895 | hdrlen = strlen(type) + MAX_HEADER_LEN; |
ef1286d3 | 1896 | header = xmalloc(hdrlen); |
a09c985e | 1897 | write_object_file_prepare(buf, len, type, oid, header, &hdrlen); |
0c3db67c ES |
1898 | |
1899 | if (!(flags & HASH_WRITE_OBJECT)) | |
1900 | goto cleanup; | |
6862ebbf | 1901 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
0c3db67c | 1902 | goto cleanup; |
3fc7281f | 1903 | status = write_loose_object(oid, header, hdrlen, buf, len, 0); |
0c3db67c ES |
1904 | |
1905 | cleanup: | |
1906 | free(header); | |
1907 | return status; | |
1908 | } | |
1909 | ||
4bdb70a4 | 1910 | int force_object_loose(const struct object_id *oid, time_t mtime) |
bbac7311 | 1911 | { |
bbac7311 NP |
1912 | void *buf; |
1913 | unsigned long len; | |
1914 | enum object_type type; | |
1af64f73 | 1915 | char hdr[MAX_HEADER_LEN]; |
bbac7311 | 1916 | int hdrlen; |
1fb23e65 | 1917 | int ret; |
bbac7311 | 1918 | |
6862ebbf | 1919 | if (has_loose_object(oid)) |
bbac7311 | 1920 | return 0; |
cba595ab | 1921 | buf = read_object(the_repository, oid, &type, &len); |
bbac7311 | 1922 | if (!buf) |
2c319886 | 1923 | return error(_("cannot read object for %s"), oid_to_hex(oid)); |
ca473cef | 1924 | hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(type), (uintmax_t)len) + 1; |
3fc7281f | 1925 | ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime); |
1fb23e65 BS |
1926 | free(buf); |
1927 | ||
1928 | return ret; | |
bbac7311 NP |
1929 | } |
1930 | ||
cba595ab JH |
1931 | int repo_has_object_file_with_flags(struct repository *r, |
1932 | const struct object_id *oid, int flags) | |
8237b185 | 1933 | { |
3e8b7d3c JN |
1934 | if (!startup_info->have_repository) |
1935 | return 0; | |
cba595ab | 1936 | return oid_object_info_extended(r, oid, NULL, |
abef9020 | 1937 | flags | OBJECT_INFO_SKIP_CACHED) >= 0; |
b419aa25 | 1938 | } |
1939 | ||
9b45f499 SB |
1940 | int repo_has_object_file(struct repository *r, |
1941 | const struct object_id *oid) | |
b419aa25 | 1942 | { |
cba595ab | 1943 | return repo_has_object_file_with_flags(r, oid, 0); |
5827a035 JK |
1944 | } |
1945 | ||
c879daa2 NTND |
1946 | static void check_tree(const void *buf, size_t size) |
1947 | { | |
1948 | struct tree_desc desc; | |
1949 | struct name_entry entry; | |
1950 | ||
1951 | init_tree_desc(&desc, buf, size); | |
1952 | while (tree_entry(&desc, &entry)) | |
1953 | /* do nothing | |
1954 | * tree_entry() will die() on malformed entries */ | |
1955 | ; | |
1956 | } | |
1957 | ||
1958 | static void check_commit(const void *buf, size_t size) | |
1959 | { | |
1960 | struct commit c; | |
1961 | memset(&c, 0, sizeof(c)); | |
08f4f445 | 1962 | if (parse_commit_buffer(the_repository, &c, buf, size, 0)) |
259328b7 | 1963 | die(_("corrupt commit")); |
c879daa2 NTND |
1964 | } |
1965 | ||
1966 | static void check_tag(const void *buf, size_t size) | |
1967 | { | |
1968 | struct tag t; | |
1969 | memset(&t, 0, sizeof(t)); | |
0e740fed | 1970 | if (parse_tag_buffer(the_repository, &t, buf, size)) |
259328b7 | 1971 | die(_("corrupt tag")); |
c879daa2 NTND |
1972 | } |
1973 | ||
58bf2a4c NTND |
1974 | static int index_mem(struct index_state *istate, |
1975 | struct object_id *oid, void *buf, size_t size, | |
c4ce46fc JH |
1976 | enum object_type type, |
1977 | const char *path, unsigned flags) | |
e7332f96 | 1978 | { |
6c510bee | 1979 | int ret, re_allocated = 0; |
c4ce46fc | 1980 | int write_object = flags & HASH_WRITE_OBJECT; |
74400e71 | 1981 | |
7672db20 | 1982 | if (!type) |
edaec3fb | 1983 | type = OBJ_BLOB; |
6c510bee LT |
1984 | |
1985 | /* | |
1986 | * Convert blobs to git internal format | |
1987 | */ | |
43df4f86 | 1988 | if ((type == OBJ_BLOB) && path) { |
f285a2d7 | 1989 | struct strbuf nbuf = STRBUF_INIT; |
58bf2a4c | 1990 | if (convert_to_git(istate, path, buf, size, &nbuf, |
8462ff43 | 1991 | get_conv_flags(flags))) { |
b315c5c0 | 1992 | buf = strbuf_detach(&nbuf, &size); |
6c510bee LT |
1993 | re_allocated = 1; |
1994 | } | |
1995 | } | |
c4ce46fc | 1996 | if (flags & HASH_FORMAT_CHECK) { |
c879daa2 NTND |
1997 | if (type == OBJ_TREE) |
1998 | check_tree(buf, size); | |
1999 | if (type == OBJ_COMMIT) | |
2000 | check_commit(buf, size); | |
2001 | if (type == OBJ_TAG) | |
2002 | check_tag(buf, size); | |
2003 | } | |
6c510bee | 2004 | |
7672db20 | 2005 | if (write_object) |
169c9c01 | 2006 | ret = write_object_file(buf, size, type_name(type), oid); |
abdc3fc8 | 2007 | else |
169c9c01 | 2008 | ret = hash_object_file(buf, size, type_name(type), oid); |
43df4f86 | 2009 | if (re_allocated) |
6c510bee | 2010 | free(buf); |
43df4f86 DP |
2011 | return ret; |
2012 | } | |
2013 | ||
58bf2a4c NTND |
2014 | static int index_stream_convert_blob(struct index_state *istate, |
2015 | struct object_id *oid, | |
2016 | int fd, | |
2017 | const char *path, | |
2018 | unsigned flags) | |
9035d75a SP |
2019 | { |
2020 | int ret; | |
2021 | const int write_object = flags & HASH_WRITE_OBJECT; | |
2022 | struct strbuf sbuf = STRBUF_INIT; | |
2023 | ||
2024 | assert(path); | |
58bf2a4c | 2025 | assert(would_convert_to_git_filter_fd(istate, path)); |
9035d75a | 2026 | |
58bf2a4c | 2027 | convert_to_git_filter_fd(istate, path, fd, &sbuf, |
8462ff43 | 2028 | get_conv_flags(flags)); |
9035d75a SP |
2029 | |
2030 | if (write_object) | |
169c9c01 | 2031 | ret = write_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB), |
a09c985e | 2032 | oid); |
9035d75a | 2033 | else |
169c9c01 | 2034 | ret = hash_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB), |
f070facc | 2035 | oid); |
9035d75a SP |
2036 | strbuf_release(&sbuf); |
2037 | return ret; | |
2038 | } | |
2039 | ||
58bf2a4c NTND |
2040 | static int index_pipe(struct index_state *istate, struct object_id *oid, |
2041 | int fd, enum object_type type, | |
7b41e1e1 JH |
2042 | const char *path, unsigned flags) |
2043 | { | |
2044 | struct strbuf sbuf = STRBUF_INIT; | |
2045 | int ret; | |
2046 | ||
2047 | if (strbuf_read(&sbuf, fd, 4096) >= 0) | |
58bf2a4c | 2048 | ret = index_mem(istate, oid, sbuf.buf, sbuf.len, type, path, flags); |
7b41e1e1 JH |
2049 | else |
2050 | ret = -1; | |
2051 | strbuf_release(&sbuf); | |
2052 | return ret; | |
2053 | } | |
2054 | ||
ea68b0ce DP |
2055 | #define SMALL_FILE_SIZE (32*1024) |
2056 | ||
58bf2a4c NTND |
2057 | static int index_core(struct index_state *istate, |
2058 | struct object_id *oid, int fd, size_t size, | |
7b41e1e1 JH |
2059 | enum object_type type, const char *path, |
2060 | unsigned flags) | |
43df4f86 DP |
2061 | { |
2062 | int ret; | |
43df4f86 | 2063 | |
7b41e1e1 | 2064 | if (!size) { |
58bf2a4c | 2065 | ret = index_mem(istate, oid, "", size, type, path, flags); |
ea68b0ce DP |
2066 | } else if (size <= SMALL_FILE_SIZE) { |
2067 | char *buf = xmalloc(size); | |
90dca671 JK |
2068 | ssize_t read_result = read_in_full(fd, buf, size); |
2069 | if (read_result < 0) | |
259328b7 | 2070 | ret = error_errno(_("read error while indexing %s"), |
90dca671 JK |
2071 | path ? path : "<unknown>"); |
2072 | else if (read_result != size) | |
259328b7 | 2073 | ret = error(_("short read while indexing %s"), |
90dca671 | 2074 | path ? path : "<unknown>"); |
ea68b0ce | 2075 | else |
58bf2a4c | 2076 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
ea68b0ce | 2077 | free(buf); |
08bda208 | 2078 | } else { |
43df4f86 | 2079 | void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0); |
58bf2a4c | 2080 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
aac17941 | 2081 | munmap(buf, size); |
08bda208 | 2082 | } |
7b41e1e1 JH |
2083 | return ret; |
2084 | } | |
2085 | ||
4dd1fbc7 | 2086 | /* |
568508e7 JH |
2087 | * This creates one packfile per large blob unless bulk-checkin |
2088 | * machinery is "plugged". | |
4dd1fbc7 JH |
2089 | * |
2090 | * This also bypasses the usual "convert-to-git" dance, and that is on | |
2091 | * purpose. We could write a streaming version of the converting | |
2092 | * functions and insert that before feeding the data to fast-import | |
4f22b101 JK |
2093 | * (or equivalent in-core API described above). However, that is |
2094 | * somewhat complicated, as we do not know the size of the filter | |
2095 | * result, which we need to know beforehand when writing a git object. | |
2096 | * Since the primary motivation for trying to stream from the working | |
2097 | * tree file and to avoid mmaping it in core is to deal with large | |
2098 | * binary blobs, they generally do not want to get any conversion, and | |
2099 | * callers should avoid this code path when filters are requested. | |
4dd1fbc7 | 2100 | */ |
7d5e1dc3 | 2101 | static int index_stream(struct object_id *oid, int fd, size_t size, |
4dd1fbc7 JH |
2102 | enum object_type type, const char *path, |
2103 | unsigned flags) | |
2104 | { | |
68ee6dfc | 2105 | return index_bulk_checkin(oid, fd, size, type, path, flags); |
4dd1fbc7 JH |
2106 | } |
2107 | ||
58bf2a4c NTND |
2108 | int index_fd(struct index_state *istate, struct object_id *oid, |
2109 | int fd, struct stat *st, | |
7b41e1e1 JH |
2110 | enum object_type type, const char *path, unsigned flags) |
2111 | { | |
2112 | int ret; | |
7b41e1e1 | 2113 | |
9079ab7c SP |
2114 | /* |
2115 | * Call xsize_t() only when needed to avoid potentially unnecessary | |
2116 | * die() for large files. | |
2117 | */ | |
58bf2a4c NTND |
2118 | if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(istate, path)) |
2119 | ret = index_stream_convert_blob(istate, oid, fd, path, flags); | |
9035d75a | 2120 | else if (!S_ISREG(st->st_mode)) |
58bf2a4c | 2121 | ret = index_pipe(istate, oid, fd, type, path, flags); |
9079ab7c | 2122 | else if (st->st_size <= big_file_threshold || type != OBJ_BLOB || |
58bf2a4c NTND |
2123 | (path && would_convert_to_git(istate, path))) |
2124 | ret = index_core(istate, oid, fd, xsize_t(st->st_size), | |
2125 | type, path, flags); | |
4dd1fbc7 | 2126 | else |
7d5e1dc3 | 2127 | ret = index_stream(oid, fd, xsize_t(st->st_size), type, path, |
9079ab7c | 2128 | flags); |
43df4f86 | 2129 | close(fd); |
aac17941 | 2130 | return ret; |
74400e71 | 2131 | } |
ec1fcc16 | 2132 | |
58bf2a4c NTND |
2133 | int index_path(struct index_state *istate, struct object_id *oid, |
2134 | const char *path, struct stat *st, unsigned flags) | |
ec1fcc16 JH |
2135 | { |
2136 | int fd; | |
b760d3aa | 2137 | struct strbuf sb = STRBUF_INIT; |
ea8e0297 | 2138 | int rc = 0; |
ec1fcc16 JH |
2139 | |
2140 | switch (st->st_mode & S_IFMT) { | |
2141 | case S_IFREG: | |
2142 | fd = open(path, O_RDONLY); | |
2143 | if (fd < 0) | |
7616c6ca | 2144 | return error_errno("open(\"%s\")", path); |
58bf2a4c | 2145 | if (index_fd(istate, oid, fd, st, OBJ_BLOB, path, flags) < 0) |
259328b7 | 2146 | return error(_("%s: failed to insert into database"), |
ec1fcc16 JH |
2147 | path); |
2148 | break; | |
2149 | case S_IFLNK: | |
7616c6ca NTND |
2150 | if (strbuf_readlink(&sb, path, st->st_size)) |
2151 | return error_errno("readlink(\"%s\")", path); | |
c4ce46fc | 2152 | if (!(flags & HASH_WRITE_OBJECT)) |
f070facc | 2153 | hash_object_file(sb.buf, sb.len, blob_type, oid); |
a09c985e | 2154 | else if (write_object_file(sb.buf, sb.len, blob_type, oid)) |
259328b7 | 2155 | rc = error(_("%s: failed to insert into database"), path); |
b760d3aa | 2156 | strbuf_release(&sb); |
ec1fcc16 | 2157 | break; |
f35a6d3b | 2158 | case S_IFDIR: |
a98e6101 | 2159 | return resolve_gitlink_ref(path, "HEAD", oid); |
ec1fcc16 | 2160 | default: |
259328b7 | 2161 | return error(_("%s: unsupported file type"), path); |
ec1fcc16 | 2162 | } |
ea8e0297 | 2163 | return rc; |
ec1fcc16 | 2164 | } |
a69e5429 JH |
2165 | |
2166 | int read_pack_header(int fd, struct pack_header *header) | |
2167 | { | |
f48ecd38 | 2168 | if (read_in_full(fd, header, sizeof(*header)) != sizeof(*header)) |
c697ad14 HO |
2169 | /* "eof before pack header was fully read" */ |
2170 | return PH_ERROR_EOF; | |
2171 | ||
a69e5429 JH |
2172 | if (header->hdr_signature != htonl(PACK_SIGNATURE)) |
2173 | /* "protocol error (pack signature mismatch detected)" */ | |
2174 | return PH_ERROR_PACK_SIGNATURE; | |
2175 | if (!pack_version_ok(header->hdr_version)) | |
2176 | /* "protocol error (pack version unsupported)" */ | |
2177 | return PH_ERROR_PROTOCOL; | |
2178 | return 0; | |
2179 | } | |
40d52ff7 | 2180 | |
e816caa0 | 2181 | void assert_oid_type(const struct object_id *oid, enum object_type expect) |
40d52ff7 | 2182 | { |
0df8e965 | 2183 | enum object_type type = oid_object_info(the_repository, oid, NULL); |
40d52ff7 | 2184 | if (type < 0) |
259328b7 | 2185 | die(_("%s is not a valid object"), oid_to_hex(oid)); |
40d52ff7 | 2186 | if (type != expect) |
259328b7 | 2187 | die(_("%s is not a valid '%s' object"), oid_to_hex(oid), |
debca9d2 | 2188 | type_name(expect)); |
40d52ff7 | 2189 | } |
27e1e22d | 2190 | |
70c49050 | 2191 | int for_each_file_in_obj_subdir(unsigned int subdir_nr, |
cc817ca3 RS |
2192 | struct strbuf *path, |
2193 | each_loose_object_fn obj_cb, | |
2194 | each_loose_cruft_fn cruft_cb, | |
2195 | each_loose_subdir_fn subdir_cb, | |
2196 | void *data) | |
27e1e22d | 2197 | { |
0375f472 RS |
2198 | size_t origlen, baselen; |
2199 | DIR *dir; | |
27e1e22d JK |
2200 | struct dirent *de; |
2201 | int r = 0; | |
62a24c89 | 2202 | struct object_id oid; |
27e1e22d | 2203 | |
70c49050 RS |
2204 | if (subdir_nr > 0xff) |
2205 | BUG("invalid loose object subdirectory: %x", subdir_nr); | |
2206 | ||
0375f472 RS |
2207 | origlen = path->len; |
2208 | strbuf_complete(path, '/'); | |
2209 | strbuf_addf(path, "%02x", subdir_nr); | |
0375f472 RS |
2210 | |
2211 | dir = opendir(path->buf); | |
27e1e22d | 2212 | if (!dir) { |
0375f472 | 2213 | if (errno != ENOENT) |
259328b7 | 2214 | r = error_errno(_("unable to open %s"), path->buf); |
0375f472 RS |
2215 | strbuf_setlen(path, origlen); |
2216 | return r; | |
27e1e22d JK |
2217 | } |
2218 | ||
62a24c89 | 2219 | oid.hash[0] = subdir_nr; |
163ee5e6 DS |
2220 | strbuf_addch(path, '/'); |
2221 | baselen = path->len; | |
62a24c89 | 2222 | |
27e1e22d | 2223 | while ((de = readdir(dir))) { |
163ee5e6 | 2224 | size_t namelen; |
27e1e22d JK |
2225 | if (is_dot_or_dotdot(de->d_name)) |
2226 | continue; | |
2227 | ||
163ee5e6 | 2228 | namelen = strlen(de->d_name); |
27e1e22d | 2229 | strbuf_setlen(path, baselen); |
163ee5e6 | 2230 | strbuf_add(path, de->d_name, namelen); |
94b5e093 | 2231 | if (namelen == the_hash_algo->hexsz - 2 && |
62a24c89 | 2232 | !hex_to_bytes(oid.hash + 1, de->d_name, |
94b5e093 | 2233 | the_hash_algo->rawsz - 1)) { |
62a24c89 RS |
2234 | if (obj_cb) { |
2235 | r = obj_cb(&oid, path->buf, data); | |
2236 | if (r) | |
2237 | break; | |
27e1e22d | 2238 | } |
62a24c89 | 2239 | continue; |
27e1e22d JK |
2240 | } |
2241 | ||
2242 | if (cruft_cb) { | |
2243 | r = cruft_cb(de->d_name, path->buf, data); | |
2244 | if (r) | |
2245 | break; | |
2246 | } | |
2247 | } | |
094c7e63 | 2248 | closedir(dir); |
27e1e22d | 2249 | |
163ee5e6 | 2250 | strbuf_setlen(path, baselen - 1); |
27e1e22d JK |
2251 | if (!r && subdir_cb) |
2252 | r = subdir_cb(subdir_nr, path->buf, data); | |
2253 | ||
0375f472 RS |
2254 | strbuf_setlen(path, origlen); |
2255 | ||
27e1e22d JK |
2256 | return r; |
2257 | } | |
2258 | ||
e6f875e0 | 2259 | int for_each_loose_file_in_objdir_buf(struct strbuf *path, |
27e1e22d JK |
2260 | each_loose_object_fn obj_cb, |
2261 | each_loose_cruft_fn cruft_cb, | |
2262 | each_loose_subdir_fn subdir_cb, | |
2263 | void *data) | |
2264 | { | |
27e1e22d JK |
2265 | int r = 0; |
2266 | int i; | |
2267 | ||
27e1e22d | 2268 | for (i = 0; i < 256; i++) { |
e6f875e0 | 2269 | r = for_each_file_in_obj_subdir(i, path, obj_cb, cruft_cb, |
27e1e22d | 2270 | subdir_cb, data); |
27e1e22d JK |
2271 | if (r) |
2272 | break; | |
2273 | } | |
2274 | ||
e6f875e0 JK |
2275 | return r; |
2276 | } | |
2277 | ||
2278 | int for_each_loose_file_in_objdir(const char *path, | |
2279 | each_loose_object_fn obj_cb, | |
2280 | each_loose_cruft_fn cruft_cb, | |
2281 | each_loose_subdir_fn subdir_cb, | |
2282 | void *data) | |
2283 | { | |
2284 | struct strbuf buf = STRBUF_INIT; | |
2285 | int r; | |
2286 | ||
2287 | strbuf_addstr(&buf, path); | |
2288 | r = for_each_loose_file_in_objdir_buf(&buf, obj_cb, cruft_cb, | |
2289 | subdir_cb, data); | |
27e1e22d | 2290 | strbuf_release(&buf); |
e6f875e0 | 2291 | |
27e1e22d JK |
2292 | return r; |
2293 | } | |
660c889e | 2294 | |
a7ff6f5a JK |
2295 | int for_each_loose_object(each_loose_object_fn cb, void *data, |
2296 | enum for_each_object_flags flags) | |
660c889e | 2297 | { |
f0eaf638 | 2298 | struct object_directory *odb; |
b0a42642 | 2299 | |
f0eaf638 JK |
2300 | prepare_alt_odb(the_repository); |
2301 | for (odb = the_repository->objects->odb; odb; odb = odb->next) { | |
2302 | int r = for_each_loose_file_in_objdir(odb->path, cb, NULL, | |
2303 | NULL, data); | |
2304 | if (r) | |
2305 | return r; | |
660c889e | 2306 | |
f0eaf638 JK |
2307 | if (flags & FOR_EACH_OBJECT_LOCAL_ONLY) |
2308 | break; | |
2309 | } | |
1385bb7b | 2310 | |
f0eaf638 | 2311 | return 0; |
660c889e JK |
2312 | } |
2313 | ||
3a2e0824 JK |
2314 | static int append_loose_object(const struct object_id *oid, const char *path, |
2315 | void *data) | |
660c889e | 2316 | { |
3a2e0824 JK |
2317 | oid_array_append(data, oid); |
2318 | return 0; | |
2319 | } | |
660c889e | 2320 | |
0000d654 RS |
2321 | struct oid_array *odb_loose_cache(struct object_directory *odb, |
2322 | const struct object_id *oid) | |
2323 | { | |
2324 | int subdir_nr = oid->hash[0]; | |
3a2e0824 | 2325 | struct strbuf buf = STRBUF_INIT; |
660c889e | 2326 | |
3a2e0824 JK |
2327 | if (subdir_nr < 0 || |
2328 | subdir_nr >= ARRAY_SIZE(odb->loose_objects_subdir_seen)) | |
2329 | BUG("subdir_nr out of range"); | |
1385bb7b | 2330 | |
3a2e0824 | 2331 | if (odb->loose_objects_subdir_seen[subdir_nr]) |
8be88dbc | 2332 | return &odb->loose_objects_cache[subdir_nr]; |
3a2e0824 JK |
2333 | |
2334 | strbuf_addstr(&buf, odb->path); | |
2335 | for_each_file_in_obj_subdir(subdir_nr, &buf, | |
2336 | append_loose_object, | |
2337 | NULL, NULL, | |
4cea1ce0 | 2338 | &odb->loose_objects_cache[subdir_nr]); |
3a2e0824 | 2339 | odb->loose_objects_subdir_seen[subdir_nr] = 1; |
7317aa71 | 2340 | strbuf_release(&buf); |
8be88dbc | 2341 | return &odb->loose_objects_cache[subdir_nr]; |
660c889e JK |
2342 | } |
2343 | ||
d4e19e51 RS |
2344 | void odb_clear_loose_cache(struct object_directory *odb) |
2345 | { | |
4cea1ce0 RS |
2346 | int i; |
2347 | ||
2348 | for (i = 0; i < ARRAY_SIZE(odb->loose_objects_cache); i++) | |
2349 | oid_array_clear(&odb->loose_objects_cache[i]); | |
d4e19e51 RS |
2350 | memset(&odb->loose_objects_subdir_seen, 0, |
2351 | sizeof(odb->loose_objects_subdir_seen)); | |
2352 | } | |
2353 | ||
00a7760e JK |
2354 | static int check_stream_oid(git_zstream *stream, |
2355 | const char *hdr, | |
2356 | unsigned long size, | |
2357 | const char *path, | |
2358 | const struct object_id *expected_oid) | |
f6371f92 | 2359 | { |
18e2588e | 2360 | git_hash_ctx c; |
00a7760e | 2361 | struct object_id real_oid; |
f6371f92 JK |
2362 | unsigned char buf[4096]; |
2363 | unsigned long total_read; | |
2364 | int status = Z_OK; | |
2365 | ||
18e2588e | 2366 | the_hash_algo->init_fn(&c); |
2367 | the_hash_algo->update_fn(&c, hdr, stream->total_out); | |
f6371f92 JK |
2368 | |
2369 | /* | |
2370 | * We already read some bytes into hdr, but the ones up to the NUL | |
2371 | * do not count against the object's content size. | |
2372 | */ | |
2373 | total_read = stream->total_out - strlen(hdr) - 1; | |
2374 | ||
2375 | /* | |
2376 | * This size comparison must be "<=" to read the final zlib packets; | |
00a7760e | 2377 | * see the comment in unpack_loose_rest for details. |
f6371f92 JK |
2378 | */ |
2379 | while (total_read <= size && | |
18ad13e5 JH |
2380 | (status == Z_OK || |
2381 | (status == Z_BUF_ERROR && !stream->avail_out))) { | |
f6371f92 JK |
2382 | stream->next_out = buf; |
2383 | stream->avail_out = sizeof(buf); | |
2384 | if (size - total_read < stream->avail_out) | |
2385 | stream->avail_out = size - total_read; | |
2386 | status = git_inflate(stream, Z_FINISH); | |
18e2588e | 2387 | the_hash_algo->update_fn(&c, buf, stream->next_out - buf); |
f6371f92 JK |
2388 | total_read += stream->next_out - buf; |
2389 | } | |
2390 | git_inflate_end(stream); | |
2391 | ||
2392 | if (status != Z_STREAM_END) { | |
00a7760e | 2393 | error(_("corrupt loose object '%s'"), oid_to_hex(expected_oid)); |
f6371f92 JK |
2394 | return -1; |
2395 | } | |
cce044df | 2396 | if (stream->avail_in) { |
259328b7 | 2397 | error(_("garbage at end of loose object '%s'"), |
00a7760e | 2398 | oid_to_hex(expected_oid)); |
cce044df JK |
2399 | return -1; |
2400 | } | |
f6371f92 | 2401 | |
00a7760e JK |
2402 | the_hash_algo->final_fn(real_oid.hash, &c); |
2403 | if (!oideq(expected_oid, &real_oid)) { | |
01f8d594 | 2404 | error(_("hash mismatch for %s (expected %s)"), path, |
00a7760e | 2405 | oid_to_hex(expected_oid)); |
f6371f92 JK |
2406 | return -1; |
2407 | } | |
2408 | ||
2409 | return 0; | |
2410 | } | |
2411 | ||
2412 | int read_loose_object(const char *path, | |
d61d87bd | 2413 | const struct object_id *expected_oid, |
f6371f92 JK |
2414 | enum object_type *type, |
2415 | unsigned long *size, | |
2416 | void **contents) | |
2417 | { | |
2418 | int ret = -1; | |
f6371f92 JK |
2419 | void *map = NULL; |
2420 | unsigned long mapsize; | |
2421 | git_zstream stream; | |
1af64f73 | 2422 | char hdr[MAX_HEADER_LEN]; |
f6371f92 JK |
2423 | |
2424 | *contents = NULL; | |
2425 | ||
514c5fdd | 2426 | map = map_loose_object_1(the_repository, path, NULL, &mapsize); |
f6371f92 | 2427 | if (!map) { |
259328b7 | 2428 | error_errno(_("unable to mmap %s"), path); |
f6371f92 JK |
2429 | goto out; |
2430 | } | |
2431 | ||
00a7760e | 2432 | if (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) { |
259328b7 | 2433 | error(_("unable to unpack header of %s"), path); |
f6371f92 JK |
2434 | goto out; |
2435 | } | |
2436 | ||
00a7760e | 2437 | *type = parse_loose_header(hdr, size); |
f6371f92 | 2438 | if (*type < 0) { |
259328b7 | 2439 | error(_("unable to parse header of %s"), path); |
f6371f92 JK |
2440 | git_inflate_end(&stream); |
2441 | goto out; | |
2442 | } | |
2443 | ||
7ac4f3a0 | 2444 | if (*type == OBJ_BLOB && *size > big_file_threshold) { |
00a7760e | 2445 | if (check_stream_oid(&stream, hdr, *size, path, expected_oid) < 0) |
f6371f92 JK |
2446 | goto out; |
2447 | } else { | |
00a7760e | 2448 | *contents = unpack_loose_rest(&stream, hdr, *size, expected_oid); |
f6371f92 | 2449 | if (!*contents) { |
259328b7 | 2450 | error(_("unable to unpack contents of %s"), path); |
f6371f92 JK |
2451 | git_inflate_end(&stream); |
2452 | goto out; | |
2453 | } | |
17e65451 | 2454 | if (check_object_signature(expected_oid, *contents, |
debca9d2 | 2455 | *size, type_name(*type))) { |
01f8d594 | 2456 | error(_("hash mismatch for %s (expected %s)"), path, |
d61d87bd | 2457 | oid_to_hex(expected_oid)); |
f6371f92 JK |
2458 | free(*contents); |
2459 | goto out; | |
2460 | } | |
2461 | } | |
2462 | ||
2463 | ret = 0; /* everything checks out */ | |
2464 | ||
2465 | out: | |
2466 | if (map) | |
2467 | munmap(map, mapsize); | |
f6371f92 JK |
2468 | return ret; |
2469 | } |