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Commit | Line | Data |
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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" |
8b4c0103 | 33 | #include "fetch-object.h" |
90c62155 | 34 | #include "object-store.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" | |
43 | ||
44 | #define EMPTY_BLOB_SHA1_BIN_LITERAL \ | |
45 | "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ | |
46 | "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" | |
47 | ||
50c5cd58 | 48 | const unsigned char null_sha1[GIT_MAX_RAWSZ]; |
3e56e724 | 49 | const struct object_id null_oid; |
e1ccd7e2 | 50 | static const struct object_id empty_tree_oid = { |
8576fde6 JK |
51 | EMPTY_TREE_SHA1_BIN_LITERAL |
52 | }; | |
e1ccd7e2 | 53 | static const struct object_id empty_blob_oid = { |
8576fde6 JK |
54 | EMPTY_BLOB_SHA1_BIN_LITERAL |
55 | }; | |
88cd621d | 56 | |
ac73cedf | 57 | static void git_hash_sha1_init(git_hash_ctx *ctx) |
f50e766b | 58 | { |
ac73cedf | 59 | git_SHA1_Init(&ctx->sha1); |
f50e766b | 60 | } |
61 | ||
ac73cedf | 62 | static void git_hash_sha1_update(git_hash_ctx *ctx, const void *data, size_t len) |
f50e766b | 63 | { |
ac73cedf | 64 | git_SHA1_Update(&ctx->sha1, data, len); |
f50e766b | 65 | } |
66 | ||
ac73cedf | 67 | static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx) |
f50e766b | 68 | { |
ac73cedf | 69 | git_SHA1_Final(hash, &ctx->sha1); |
f50e766b | 70 | } |
71 | ||
ac73cedf | 72 | static void git_hash_unknown_init(git_hash_ctx *ctx) |
f50e766b | 73 | { |
1a07e59c | 74 | BUG("trying to init unknown hash"); |
f50e766b | 75 | } |
76 | ||
ac73cedf | 77 | static void git_hash_unknown_update(git_hash_ctx *ctx, const void *data, size_t len) |
f50e766b | 78 | { |
1a07e59c | 79 | BUG("trying to update unknown hash"); |
f50e766b | 80 | } |
81 | ||
ac73cedf | 82 | static void git_hash_unknown_final(unsigned char *hash, git_hash_ctx *ctx) |
f50e766b | 83 | { |
1a07e59c | 84 | BUG("trying to finalize unknown hash"); |
f50e766b | 85 | } |
86 | ||
87 | const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { | |
88 | { | |
89 | NULL, | |
90 | 0x00000000, | |
91 | 0, | |
92 | 0, | |
f50e766b | 93 | git_hash_unknown_init, |
94 | git_hash_unknown_update, | |
95 | git_hash_unknown_final, | |
96 | NULL, | |
97 | NULL, | |
98 | }, | |
99 | { | |
100 | "sha-1", | |
101 | /* "sha1", big-endian */ | |
102 | 0x73686131, | |
f50e766b | 103 | GIT_SHA1_RAWSZ, |
104 | GIT_SHA1_HEXSZ, | |
105 | git_hash_sha1_init, | |
106 | git_hash_sha1_update, | |
107 | git_hash_sha1_final, | |
108 | &empty_tree_oid, | |
109 | &empty_blob_oid, | |
110 | }, | |
111 | }; | |
112 | ||
d8a92ced | 113 | const char *empty_tree_oid_hex(void) |
114 | { | |
115 | static char buf[GIT_MAX_HEXSZ + 1]; | |
116 | return oid_to_hex_r(buf, the_hash_algo->empty_tree); | |
117 | } | |
118 | ||
119 | const char *empty_blob_oid_hex(void) | |
120 | { | |
121 | static char buf[GIT_MAX_HEXSZ + 1]; | |
122 | return oid_to_hex_r(buf, the_hash_algo->empty_blob); | |
123 | } | |
124 | ||
c597ba80 NTND |
125 | /* |
126 | * This is meant to hold a *small* number of objects that you would | |
127 | * want read_sha1_file() to be able to return, but yet you do not want | |
128 | * to write them into the object store (e.g. a browse-only | |
129 | * application). | |
130 | */ | |
131 | static struct cached_object { | |
62ba93ea | 132 | struct object_id oid; |
c597ba80 NTND |
133 | enum object_type type; |
134 | void *buf; | |
135 | unsigned long size; | |
136 | } *cached_objects; | |
137 | static int cached_object_nr, cached_object_alloc; | |
138 | ||
139 | static struct cached_object empty_tree = { | |
62ba93ea | 140 | { EMPTY_TREE_SHA1_BIN_LITERAL }, |
c597ba80 NTND |
141 | OBJ_TREE, |
142 | "", | |
143 | 0 | |
144 | }; | |
145 | ||
62ba93ea | 146 | static struct cached_object *find_cached_object(const struct object_id *oid) |
c597ba80 NTND |
147 | { |
148 | int i; | |
149 | struct cached_object *co = cached_objects; | |
150 | ||
151 | for (i = 0; i < cached_object_nr; i++, co++) { | |
4a7e27e9 | 152 | if (oideq(&co->oid, oid)) |
c597ba80 NTND |
153 | return co; |
154 | } | |
4a7e27e9 | 155 | if (oideq(oid, the_hash_algo->empty_tree)) |
c597ba80 NTND |
156 | return &empty_tree; |
157 | return NULL; | |
158 | } | |
159 | ||
9472935d | 160 | |
8462ff43 | 161 | static int get_conv_flags(unsigned flags) |
9472935d TB |
162 | { |
163 | if (flags & HASH_RENORMALIZE) | |
8462ff43 | 164 | return CONV_EOL_RENORMALIZE; |
9472935d | 165 | else if (flags & HASH_WRITE_OBJECT) |
107642fe | 166 | return global_conv_flags_eol | CONV_WRITE_OBJECT; |
9472935d | 167 | else |
8462ff43 | 168 | return 0; |
9472935d TB |
169 | } |
170 | ||
171 | ||
90a6464b JH |
172 | int mkdir_in_gitdir(const char *path) |
173 | { | |
174 | if (mkdir(path, 0777)) { | |
175 | int saved_errno = errno; | |
176 | struct stat st; | |
177 | struct strbuf sb = STRBUF_INIT; | |
178 | ||
179 | if (errno != EEXIST) | |
180 | return -1; | |
181 | /* | |
182 | * Are we looking at a path in a symlinked worktree | |
183 | * whose original repository does not yet have it? | |
184 | * e.g. .git/rr-cache pointing at its original | |
185 | * repository in which the user hasn't performed any | |
186 | * conflict resolution yet? | |
187 | */ | |
188 | if (lstat(path, &st) || !S_ISLNK(st.st_mode) || | |
189 | strbuf_readlink(&sb, path, st.st_size) || | |
190 | !is_absolute_path(sb.buf) || | |
191 | mkdir(sb.buf, 0777)) { | |
192 | strbuf_release(&sb); | |
193 | errno = saved_errno; | |
194 | return -1; | |
195 | } | |
196 | strbuf_release(&sb); | |
197 | } | |
198 | return adjust_shared_perm(path); | |
199 | } | |
200 | ||
0be0521b | 201 | enum scld_error safe_create_leading_directories(char *path) |
b2cb9425 | 202 | { |
26c8ae2a | 203 | char *next_component = path + offset_1st_component(path); |
0be0521b | 204 | enum scld_error ret = SCLD_OK; |
67d42212 | 205 | |
0be0521b | 206 | while (ret == SCLD_OK && next_component) { |
f0502332 | 207 | struct stat st; |
0f527403 | 208 | char *slash = next_component, slash_character; |
f0502332 | 209 | |
0f527403 MH |
210 | while (*slash && !is_dir_sep(*slash)) |
211 | slash++; | |
212 | ||
213 | if (!*slash) | |
b2cb9425 | 214 | break; |
bf10cf70 | 215 | |
26c8ae2a | 216 | next_component = slash + 1; |
0f527403 | 217 | while (is_dir_sep(*next_component)) |
bf10cf70 | 218 | next_component++; |
26c8ae2a | 219 | if (!*next_component) |
5f0bdf50 | 220 | break; |
831651fd | 221 | |
0f527403 | 222 | slash_character = *slash; |
831651fd | 223 | *slash = '\0'; |
67d42212 JR |
224 | if (!stat(path, &st)) { |
225 | /* path exists */ | |
204a047f MH |
226 | if (!S_ISDIR(st.st_mode)) { |
227 | errno = ENOTDIR; | |
0be0521b | 228 | ret = SCLD_EXISTS; |
204a047f | 229 | } |
53a39721 | 230 | } else if (mkdir(path, 0777)) { |
928734d9 | 231 | if (errno == EEXIST && |
9e6f885d | 232 | !stat(path, &st) && S_ISDIR(st.st_mode)) |
928734d9 | 233 | ; /* somebody created it since we checked */ |
18d37e86 MH |
234 | else if (errno == ENOENT) |
235 | /* | |
236 | * Either mkdir() failed because | |
237 | * somebody just pruned the containing | |
238 | * directory, or stat() failed because | |
239 | * the file that was in our way was | |
240 | * just removed. Either way, inform | |
241 | * the caller that it might be worth | |
242 | * trying again: | |
243 | */ | |
244 | ret = SCLD_VANISHED; | |
9e6f885d | 245 | else |
0be0521b | 246 | ret = SCLD_FAILED; |
53a39721 | 247 | } else if (adjust_shared_perm(path)) { |
0be0521b | 248 | ret = SCLD_PERMS; |
457f06d6 | 249 | } |
0f527403 | 250 | *slash = slash_character; |
b2cb9425 | 251 | } |
9e6f885d | 252 | return ret; |
b2cb9425 | 253 | } |
723c31fe | 254 | |
0be0521b | 255 | enum scld_error safe_create_leading_directories_const(const char *path) |
8e21d63b | 256 | { |
02944307 | 257 | int save_errno; |
8e21d63b JK |
258 | /* path points to cache entries, so xstrdup before messing with it */ |
259 | char *buf = xstrdup(path); | |
0be0521b | 260 | enum scld_error result = safe_create_leading_directories(buf); |
02944307 MH |
261 | |
262 | save_errno = errno; | |
8e21d63b | 263 | free(buf); |
02944307 | 264 | errno = save_errno; |
8e21d63b JK |
265 | return result; |
266 | } | |
267 | ||
177978f5 MH |
268 | int raceproof_create_file(const char *path, create_file_fn fn, void *cb) |
269 | { | |
270 | /* | |
271 | * The number of times we will try to remove empty directories | |
272 | * in the way of path. This is only 1 because if another | |
273 | * process is racily creating directories that conflict with | |
274 | * us, we don't want to fight against them. | |
275 | */ | |
276 | int remove_directories_remaining = 1; | |
277 | ||
278 | /* | |
279 | * The number of times that we will try to create the | |
280 | * directories containing path. We are willing to attempt this | |
281 | * more than once, because another process could be trying to | |
282 | * clean up empty directories at the same time as we are | |
283 | * trying to create them. | |
284 | */ | |
285 | int create_directories_remaining = 3; | |
286 | ||
287 | /* A scratch copy of path, filled lazily if we need it: */ | |
288 | struct strbuf path_copy = STRBUF_INIT; | |
289 | ||
290 | int ret, save_errno; | |
291 | ||
292 | /* Sanity check: */ | |
293 | assert(*path); | |
294 | ||
295 | retry_fn: | |
296 | ret = fn(path, cb); | |
297 | save_errno = errno; | |
298 | if (!ret) | |
299 | goto out; | |
300 | ||
301 | if (errno == EISDIR && remove_directories_remaining-- > 0) { | |
302 | /* | |
303 | * A directory is in the way. Maybe it is empty; try | |
304 | * to remove it: | |
305 | */ | |
306 | if (!path_copy.len) | |
307 | strbuf_addstr(&path_copy, path); | |
308 | ||
309 | if (!remove_dir_recursively(&path_copy, REMOVE_DIR_EMPTY_ONLY)) | |
310 | goto retry_fn; | |
311 | } else if (errno == ENOENT && create_directories_remaining-- > 0) { | |
312 | /* | |
313 | * Maybe the containing directory didn't exist, or | |
314 | * maybe it was just deleted by a process that is | |
315 | * racing with us to clean up empty directories. Try | |
316 | * to create it: | |
317 | */ | |
318 | enum scld_error scld_result; | |
319 | ||
320 | if (!path_copy.len) | |
321 | strbuf_addstr(&path_copy, path); | |
322 | ||
323 | do { | |
324 | scld_result = safe_create_leading_directories(path_copy.buf); | |
325 | if (scld_result == SCLD_OK) | |
326 | goto retry_fn; | |
327 | } while (scld_result == SCLD_VANISHED && create_directories_remaining-- > 0); | |
328 | } | |
329 | ||
330 | out: | |
331 | strbuf_release(&path_copy); | |
332 | errno = save_errno; | |
333 | return ret; | |
334 | } | |
335 | ||
f7b7774f | 336 | static void fill_sha1_path(struct strbuf *buf, const unsigned char *sha1) |
ace1534d JH |
337 | { |
338 | int i; | |
94b5e093 | 339 | for (i = 0; i < the_hash_algo->rawsz; i++) { |
ace1534d JH |
340 | static char hex[] = "0123456789abcdef"; |
341 | unsigned int val = sha1[i]; | |
f7b7774f JK |
342 | strbuf_addch(buf, hex[val >> 4]); |
343 | strbuf_addch(buf, hex[val & 0xf]); | |
afbba2f0 | 344 | if (!i) |
f7b7774f | 345 | strbuf_addch(buf, '/'); |
ace1534d JH |
346 | } |
347 | } | |
348 | ||
f0eaf638 JK |
349 | static const char *odb_loose_path(struct object_directory *odb, |
350 | struct strbuf *buf, | |
f3f043a1 | 351 | const unsigned char *sha1) |
0fcfd160 | 352 | { |
b69fb867 | 353 | strbuf_reset(buf); |
f0eaf638 | 354 | strbuf_addstr(buf, odb->path); |
34498471 | 355 | strbuf_addch(buf, '/'); |
ea657730 | 356 | fill_sha1_path(buf, sha1); |
f3f043a1 | 357 | return buf->buf; |
0fcfd160 LT |
358 | } |
359 | ||
f3f043a1 JK |
360 | const char *loose_object_path(struct repository *r, struct strbuf *buf, |
361 | const unsigned char *sha1) | |
29ec6af2 | 362 | { |
f0eaf638 | 363 | return odb_loose_path(r->objects->odb, buf, sha1); |
0fcfd160 LT |
364 | } |
365 | ||
4ea82473 JK |
366 | /* |
367 | * Return non-zero iff the path is usable as an alternate object database. | |
368 | */ | |
13313fc3 SB |
369 | static int alt_odb_usable(struct raw_object_store *o, |
370 | struct strbuf *path, | |
371 | const char *normalized_objdir) | |
4ea82473 | 372 | { |
263db403 | 373 | struct object_directory *odb; |
4ea82473 JK |
374 | |
375 | /* Detect cases where alternate disappeared */ | |
376 | if (!is_directory(path->buf)) { | |
259328b7 NTND |
377 | error(_("object directory %s does not exist; " |
378 | "check .git/objects/info/alternates"), | |
4ea82473 JK |
379 | path->buf); |
380 | return 0; | |
381 | } | |
382 | ||
383 | /* | |
384 | * Prevent the common mistake of listing the same | |
385 | * thing twice, or object directory itself. | |
386 | */ | |
f0eaf638 | 387 | for (odb = o->odb; odb; odb = odb->next) { |
263db403 | 388 | if (!fspathcmp(path->buf, odb->path)) |
4ea82473 JK |
389 | return 0; |
390 | } | |
391 | if (!fspathcmp(path->buf, normalized_objdir)) | |
392 | return 0; | |
393 | ||
394 | return 1; | |
395 | } | |
396 | ||
ddd5d056 JH |
397 | /* |
398 | * Prepare alternate object database registry. | |
d5a63b99 JH |
399 | * |
400 | * The variable alt_odb_list points at the list of struct | |
263db403 | 401 | * object_directory. The elements on this list come from |
d5a63b99 JH |
402 | * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT |
403 | * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates, | |
1494e038 JH |
404 | * whose contents is similar to that environment variable but can be |
405 | * LF separated. Its base points at a statically allocated buffer that | |
d5a63b99 JH |
406 | * contains "/the/directory/corresponding/to/.git/objects/...", while |
407 | * its name points just after the slash at the end of ".git/objects/" | |
408 | * in the example above, and has enough space to hold 40-byte hex | |
409 | * SHA1, an extra slash for the first level indirection, and the | |
410 | * terminating NUL. | |
ddd5d056 | 411 | */ |
77f012e8 SB |
412 | static void read_info_alternates(struct repository *r, |
413 | const char *relative_base, | |
414 | int depth); | |
415 | static int link_alt_odb_entry(struct repository *r, const char *entry, | |
cfc62fc9 | 416 | const char *relative_base, int depth, const char *normalized_objdir) |
ace1534d | 417 | { |
263db403 | 418 | struct object_directory *ent; |
5bdf0a84 | 419 | struct strbuf pathbuf = STRBUF_INIT; |
d5a63b99 | 420 | |
85dadc38 | 421 | if (!is_absolute_path(entry) && relative_base) { |
4ac9006f | 422 | strbuf_realpath(&pathbuf, relative_base, 1); |
5bdf0a84 | 423 | strbuf_addch(&pathbuf, '/'); |
c2f493a4 | 424 | } |
6eac50d8 | 425 | strbuf_addstr(&pathbuf, entry); |
c2f493a4 | 426 | |
37a95862 | 427 | if (strbuf_normalize_path(&pathbuf) < 0 && relative_base) { |
259328b7 | 428 | error(_("unable to normalize alternate object path: %s"), |
670c359d JK |
429 | pathbuf.buf); |
430 | strbuf_release(&pathbuf); | |
431 | return -1; | |
432 | } | |
5bdf0a84 HW |
433 | |
434 | /* | |
435 | * The trailing slash after the directory name is given by | |
436 | * this function at the end. Remove duplicates. | |
437 | */ | |
4ea82473 JK |
438 | while (pathbuf.len && pathbuf.buf[pathbuf.len - 1] == '/') |
439 | strbuf_setlen(&pathbuf, pathbuf.len - 1); | |
5bdf0a84 | 440 | |
77f012e8 | 441 | if (!alt_odb_usable(r->objects, &pathbuf, normalized_objdir)) { |
4ea82473 | 442 | strbuf_release(&pathbuf); |
c2f493a4 MW |
443 | return -1; |
444 | } | |
445 | ||
f0eaf638 JK |
446 | ent = xcalloc(1, sizeof(*ent)); |
447 | ent->path = xstrdup(pathbuf.buf); | |
c2f493a4 MW |
448 | |
449 | /* add the alternate entry */ | |
f0eaf638 JK |
450 | *r->objects->odb_tail = ent; |
451 | r->objects->odb_tail = &(ent->next); | |
c2f493a4 MW |
452 | ent->next = NULL; |
453 | ||
454 | /* recursively add alternates */ | |
77f012e8 | 455 | read_info_alternates(r, pathbuf.buf, depth + 1); |
c2f493a4 | 456 | |
4ea82473 | 457 | strbuf_release(&pathbuf); |
c2f493a4 MW |
458 | return 0; |
459 | } | |
460 | ||
cf3c6352 JK |
461 | static const char *parse_alt_odb_entry(const char *string, |
462 | int sep, | |
463 | struct strbuf *out) | |
464 | { | |
465 | const char *end; | |
466 | ||
467 | strbuf_reset(out); | |
468 | ||
469 | if (*string == '#') { | |
470 | /* comment; consume up to next separator */ | |
471 | end = strchrnul(string, sep); | |
472 | } else if (*string == '"' && !unquote_c_style(out, string, &end)) { | |
473 | /* | |
474 | * quoted path; unquote_c_style has copied the | |
475 | * data for us and set "end". Broken quoting (e.g., | |
476 | * an entry that doesn't end with a quote) falls | |
477 | * back to the unquoted case below. | |
478 | */ | |
479 | } else { | |
480 | /* normal, unquoted path */ | |
481 | end = strchrnul(string, sep); | |
482 | strbuf_add(out, string, end - string); | |
483 | } | |
484 | ||
485 | if (*end) | |
486 | end++; | |
487 | return end; | |
488 | } | |
489 | ||
77f012e8 SB |
490 | static void link_alt_odb_entries(struct repository *r, const char *alt, |
491 | int sep, const char *relative_base, int depth) | |
c2f493a4 | 492 | { |
539e7506 | 493 | struct strbuf objdirbuf = STRBUF_INIT; |
cf3c6352 | 494 | struct strbuf entry = STRBUF_INIT; |
c2f493a4 | 495 | |
f28e3668 JK |
496 | if (!alt || !*alt) |
497 | return; | |
498 | ||
c2f493a4 | 499 | if (depth > 5) { |
259328b7 | 500 | error(_("%s: ignoring alternate object stores, nesting too deep"), |
c2f493a4 MW |
501 | relative_base); |
502 | return; | |
503 | } | |
504 | ||
f0eaf638 | 505 | strbuf_add_absolute_path(&objdirbuf, r->objects->odb->path); |
670c359d | 506 | if (strbuf_normalize_path(&objdirbuf) < 0) |
259328b7 | 507 | die(_("unable to normalize object directory: %s"), |
670c359d | 508 | objdirbuf.buf); |
539e7506 | 509 | |
cf3c6352 JK |
510 | while (*alt) { |
511 | alt = parse_alt_odb_entry(alt, sep, &entry); | |
512 | if (!entry.len) | |
9577e7e3 | 513 | continue; |
77f012e8 | 514 | link_alt_odb_entry(r, entry.buf, |
cfc62fc9 | 515 | relative_base, depth, objdirbuf.buf); |
9577e7e3 | 516 | } |
cf3c6352 | 517 | strbuf_release(&entry); |
539e7506 | 518 | strbuf_release(&objdirbuf); |
d5a63b99 JH |
519 | } |
520 | ||
77f012e8 SB |
521 | static void read_info_alternates(struct repository *r, |
522 | const char *relative_base, | |
523 | int depth) | |
d5a63b99 | 524 | { |
5015f01c | 525 | char *path; |
dc732bd5 | 526 | struct strbuf buf = STRBUF_INIT; |
d5a63b99 | 527 | |
5015f01c | 528 | path = xstrfmt("%s/info/alternates", relative_base); |
dc732bd5 | 529 | if (strbuf_read_file(&buf, path, 1024) < 0) { |
f0f7bebe | 530 | warn_on_fopen_errors(path); |
dc732bd5 | 531 | free(path); |
9a217f2a | 532 | return; |
ace1534d | 533 | } |
d5a63b99 | 534 | |
77f012e8 | 535 | link_alt_odb_entries(r, buf.buf, '\n', relative_base, depth); |
dc732bd5 JK |
536 | strbuf_release(&buf); |
537 | free(path); | |
ace1534d JH |
538 | } |
539 | ||
bef70b22 DB |
540 | void add_to_alternates_file(const char *reference) |
541 | { | |
f132a127 | 542 | struct lock_file lock = LOCK_INIT; |
77b9b1d1 JK |
543 | char *alts = git_pathdup("objects/info/alternates"); |
544 | FILE *in, *out; | |
f132a127 | 545 | int found = 0; |
77b9b1d1 | 546 | |
f132a127 MÅ |
547 | hold_lock_file_for_update(&lock, alts, LOCK_DIE_ON_ERROR); |
548 | out = fdopen_lock_file(&lock, "w"); | |
77b9b1d1 | 549 | if (!out) |
259328b7 | 550 | die_errno(_("unable to fdopen alternates lockfile")); |
77b9b1d1 JK |
551 | |
552 | in = fopen(alts, "r"); | |
553 | if (in) { | |
554 | struct strbuf line = STRBUF_INIT; | |
77b9b1d1 | 555 | |
3f163962 | 556 | while (strbuf_getline(&line, in) != EOF) { |
77b9b1d1 JK |
557 | if (!strcmp(reference, line.buf)) { |
558 | found = 1; | |
559 | break; | |
560 | } | |
561 | fprintf_or_die(out, "%s\n", line.buf); | |
562 | } | |
563 | ||
564 | strbuf_release(&line); | |
565 | fclose(in); | |
77b9b1d1 JK |
566 | } |
567 | else if (errno != ENOENT) | |
259328b7 | 568 | die_errno(_("unable to read alternates file")); |
77b9b1d1 | 569 | |
f132a127 MÅ |
570 | if (found) { |
571 | rollback_lock_file(&lock); | |
572 | } else { | |
77b9b1d1 | 573 | fprintf_or_die(out, "%s\n", reference); |
f132a127 | 574 | if (commit_lock_file(&lock)) |
259328b7 | 575 | die_errno(_("unable to move new alternates file into place")); |
f0eaf638 | 576 | if (the_repository->objects->loaded_alternates) |
93d8d1e2 SB |
577 | link_alt_odb_entries(the_repository, reference, |
578 | '\n', NULL, 0); | |
77b9b1d1 JK |
579 | } |
580 | free(alts); | |
bef70b22 DB |
581 | } |
582 | ||
a5b34d21 JK |
583 | void add_to_alternates_memory(const char *reference) |
584 | { | |
585 | /* | |
586 | * Make sure alternates are initialized, or else our entry may be | |
587 | * overwritten when they are. | |
588 | */ | |
0b209034 | 589 | prepare_alt_odb(the_repository); |
a5b34d21 | 590 | |
93d8d1e2 SB |
591 | link_alt_odb_entries(the_repository, reference, |
592 | '\n', NULL, 0); | |
a5b34d21 JK |
593 | } |
594 | ||
9eeea7d2 SB |
595 | /* |
596 | * Compute the exact path an alternate is at and returns it. In case of | |
597 | * error NULL is returned and the human readable error is added to `err` | |
efde7b72 | 598 | * `path` may be relative and should point to $GIT_DIR. |
9eeea7d2 SB |
599 | * `err` must not be null. |
600 | */ | |
601 | char *compute_alternate_path(const char *path, struct strbuf *err) | |
602 | { | |
603 | char *ref_git = NULL; | |
604 | const char *repo, *ref_git_s; | |
605 | int seen_error = 0; | |
606 | ||
607 | ref_git_s = real_path_if_valid(path); | |
608 | if (!ref_git_s) { | |
609 | seen_error = 1; | |
610 | strbuf_addf(err, _("path '%s' does not exist"), path); | |
611 | goto out; | |
612 | } else | |
613 | /* | |
614 | * Beware: read_gitfile(), real_path() and mkpath() | |
615 | * return static buffer | |
616 | */ | |
617 | ref_git = xstrdup(ref_git_s); | |
618 | ||
619 | repo = read_gitfile(ref_git); | |
620 | if (!repo) | |
621 | repo = read_gitfile(mkpath("%s/.git", ref_git)); | |
622 | if (repo) { | |
623 | free(ref_git); | |
624 | ref_git = xstrdup(repo); | |
625 | } | |
626 | ||
627 | if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) { | |
628 | char *ref_git_git = mkpathdup("%s/.git", ref_git); | |
629 | free(ref_git); | |
630 | ref_git = ref_git_git; | |
631 | } else if (!is_directory(mkpath("%s/objects", ref_git))) { | |
632 | struct strbuf sb = STRBUF_INIT; | |
633 | seen_error = 1; | |
634 | if (get_common_dir(&sb, ref_git)) { | |
635 | strbuf_addf(err, | |
636 | _("reference repository '%s' as a linked " | |
637 | "checkout is not supported yet."), | |
638 | path); | |
639 | goto out; | |
640 | } | |
641 | ||
642 | strbuf_addf(err, _("reference repository '%s' is not a " | |
643 | "local repository."), path); | |
644 | goto out; | |
645 | } | |
646 | ||
647 | if (!access(mkpath("%s/shallow", ref_git), F_OK)) { | |
648 | strbuf_addf(err, _("reference repository '%s' is shallow"), | |
649 | path); | |
650 | seen_error = 1; | |
651 | goto out; | |
652 | } | |
653 | ||
654 | if (!access(mkpath("%s/info/grafts", ref_git), F_OK)) { | |
655 | strbuf_addf(err, | |
656 | _("reference repository '%s' is grafted"), | |
657 | path); | |
658 | seen_error = 1; | |
659 | goto out; | |
660 | } | |
661 | ||
662 | out: | |
663 | if (seen_error) { | |
6a83d902 | 664 | FREE_AND_NULL(ref_git); |
9eeea7d2 SB |
665 | } |
666 | ||
667 | return ref_git; | |
668 | } | |
669 | ||
fe1b2268 | 670 | int foreach_alt_odb(alt_odb_fn fn, void *cb) |
d79796bc | 671 | { |
263db403 | 672 | struct object_directory *ent; |
fe1b2268 | 673 | int r = 0; |
d79796bc | 674 | |
0b209034 | 675 | prepare_alt_odb(the_repository); |
f0eaf638 | 676 | for (ent = the_repository->objects->odb->next; ent; ent = ent->next) { |
fe1b2268 JK |
677 | r = fn(ent, cb); |
678 | if (r) | |
679 | break; | |
680 | } | |
681 | return r; | |
d79796bc JH |
682 | } |
683 | ||
13068bf0 | 684 | void prepare_alt_odb(struct repository *r) |
c2f493a4 | 685 | { |
f0eaf638 | 686 | if (r->objects->loaded_alternates) |
7dc24aa5 SP |
687 | return; |
688 | ||
13068bf0 | 689 | link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0); |
c2f493a4 | 690 | |
f0eaf638 JK |
691 | read_info_alternates(r, r->objects->odb->path, 0); |
692 | r->objects->loaded_alternates = 1; | |
c2f493a4 MW |
693 | } |
694 | ||
3096b2ec | 695 | /* Returns 1 if we have successfully freshened the file, 0 otherwise. */ |
33d4221c | 696 | static int freshen_file(const char *fn) |
ace1534d | 697 | { |
33d4221c JK |
698 | struct utimbuf t; |
699 | t.actime = t.modtime = time(NULL); | |
700 | return !utime(fn, &t); | |
0f4dc14a | 701 | } |
ace1534d | 702 | |
3096b2ec JK |
703 | /* |
704 | * All of the check_and_freshen functions return 1 if the file exists and was | |
705 | * freshened (if freshening was requested), 0 otherwise. If they return | |
706 | * 0, you should not assume that it is safe to skip a write of the object (it | |
707 | * either does not exist on disk, or has a stale mtime and may be subject to | |
708 | * pruning). | |
709 | */ | |
6a5e6f5e | 710 | int check_and_freshen_file(const char *fn, int freshen) |
33d4221c JK |
711 | { |
712 | if (access(fn, F_OK)) | |
713 | return 0; | |
3096b2ec | 714 | if (freshen && !freshen_file(fn)) |
33d4221c JK |
715 | return 0; |
716 | return 1; | |
717 | } | |
718 | ||
f0eaf638 JK |
719 | static int check_and_freshen_odb(struct object_directory *odb, |
720 | const struct object_id *oid, | |
721 | int freshen) | |
33d4221c | 722 | { |
f0eaf638 JK |
723 | static struct strbuf path = STRBUF_INIT; |
724 | odb_loose_path(odb, &path, oid->hash); | |
725 | return check_and_freshen_file(path.buf, freshen); | |
726 | } | |
ea657730 | 727 | |
f0eaf638 JK |
728 | static int check_and_freshen_local(const struct object_id *oid, int freshen) |
729 | { | |
730 | return check_and_freshen_odb(the_repository->objects->odb, oid, freshen); | |
33d4221c JK |
731 | } |
732 | ||
6862ebbf | 733 | static int check_and_freshen_nonlocal(const struct object_id *oid, int freshen) |
0f4dc14a | 734 | { |
263db403 | 735 | struct object_directory *odb; |
f3f043a1 | 736 | |
0b209034 | 737 | prepare_alt_odb(the_repository); |
f0eaf638 JK |
738 | for (odb = the_repository->objects->odb->next; odb; odb = odb->next) { |
739 | if (check_and_freshen_odb(odb, oid, freshen)) | |
c529d75a | 740 | return 1; |
ace1534d | 741 | } |
c529d75a | 742 | return 0; |
ace1534d JH |
743 | } |
744 | ||
6862ebbf | 745 | static int check_and_freshen(const struct object_id *oid, int freshen) |
33d4221c | 746 | { |
6862ebbf | 747 | return check_and_freshen_local(oid, freshen) || |
748 | check_and_freshen_nonlocal(oid, freshen); | |
33d4221c JK |
749 | } |
750 | ||
6862ebbf | 751 | int has_loose_object_nonlocal(const struct object_id *oid) |
33d4221c | 752 | { |
6862ebbf | 753 | return check_and_freshen_nonlocal(oid, 0); |
33d4221c JK |
754 | } |
755 | ||
6862ebbf | 756 | static int has_loose_object(const struct object_id *oid) |
0f4dc14a | 757 | { |
6862ebbf | 758 | return check_and_freshen(oid, 0); |
0f4dc14a BC |
759 | } |
760 | ||
02710228 SP |
761 | static void mmap_limit_check(size_t length) |
762 | { | |
763 | static size_t limit = 0; | |
764 | if (!limit) { | |
765 | limit = git_env_ulong("GIT_MMAP_LIMIT", 0); | |
766 | if (!limit) | |
767 | limit = SIZE_MAX; | |
768 | } | |
769 | if (length > limit) | |
259328b7 | 770 | die(_("attempting to mmap %"PRIuMAX" over limit %"PRIuMAX), |
02710228 SP |
771 | (uintmax_t)length, (uintmax_t)limit); |
772 | } | |
773 | ||
1570856b JK |
774 | void *xmmap_gently(void *start, size_t length, |
775 | int prot, int flags, int fd, off_t offset) | |
58ecbd5e | 776 | { |
02710228 SP |
777 | void *ret; |
778 | ||
779 | mmap_limit_check(length); | |
780 | ret = mmap(start, length, prot, flags, fd, offset); | |
58ecbd5e JN |
781 | if (ret == MAP_FAILED) { |
782 | if (!length) | |
783 | return NULL; | |
7c3ecb32 | 784 | release_pack_memory(length); |
58ecbd5e | 785 | ret = mmap(start, length, prot, flags, fd, offset); |
58ecbd5e JN |
786 | } |
787 | return ret; | |
788 | } | |
789 | ||
1570856b JK |
790 | void *xmmap(void *start, size_t length, |
791 | int prot, int flags, int fd, off_t offset) | |
792 | { | |
793 | void *ret = xmmap_gently(start, length, prot, flags, fd, offset); | |
794 | if (ret == MAP_FAILED) | |
259328b7 | 795 | die_errno(_("mmap failed")); |
1570856b JK |
796 | return ret; |
797 | } | |
798 | ||
88d0db55 | 799 | /* |
090ea126 NTND |
800 | * With an in-core object data in "map", rehash it to make sure the |
801 | * object name actually matches "sha1" to detect object corruption. | |
802 | * With "map" == NULL, try reading the object named with "sha1" using | |
803 | * the streaming interface and rehash it to do the same. | |
88d0db55 | 804 | */ |
17e65451 | 805 | int check_object_signature(const struct object_id *oid, void *map, |
806 | unsigned long size, const char *type) | |
88d0db55 | 807 | { |
f070facc | 808 | struct object_id real_oid; |
090ea126 NTND |
809 | enum object_type obj_type; |
810 | struct git_istream *st; | |
18e2588e | 811 | git_hash_ctx c; |
1af64f73 | 812 | char hdr[MAX_HEADER_LEN]; |
090ea126 | 813 | int hdrlen; |
88d0db55 | 814 | |
090ea126 | 815 | if (map) { |
f070facc | 816 | hash_object_file(map, size, type, &real_oid); |
9001dc2a | 817 | return !oideq(oid, &real_oid) ? -1 : 0; |
88d0db55 BC |
818 | } |
819 | ||
ef7b5195 | 820 | st = open_istream(oid, &obj_type, &size, NULL); |
090ea126 NTND |
821 | if (!st) |
822 | return -1; | |
88d0db55 | 823 | |
090ea126 | 824 | /* Generate the header */ |
ca473cef | 825 | hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(obj_type), (uintmax_t)size) + 1; |
88d0db55 | 826 | |
090ea126 | 827 | /* Sha1.. */ |
18e2588e | 828 | the_hash_algo->init_fn(&c); |
829 | the_hash_algo->update_fn(&c, hdr, hdrlen); | |
090ea126 NTND |
830 | for (;;) { |
831 | char buf[1024 * 16]; | |
832 | ssize_t readlen = read_istream(st, buf, sizeof(buf)); | |
1f688557 | 833 | |
f54fac53 JK |
834 | if (readlen < 0) { |
835 | close_istream(st); | |
836 | return -1; | |
837 | } | |
090ea126 NTND |
838 | if (!readlen) |
839 | break; | |
18e2588e | 840 | the_hash_algo->update_fn(&c, buf, readlen); |
fa5fc15d | 841 | } |
18e2588e | 842 | the_hash_algo->final_fn(real_oid.hash, &c); |
090ea126 | 843 | close_istream(st); |
9001dc2a | 844 | return !oideq(oid, &real_oid) ? -1 : 0; |
fa5fc15d SP |
845 | } |
846 | ||
1b8ac5ea | 847 | int git_open_cloexec(const char *name, int flags) |
a0788266 | 848 | { |
1e3001a8 JH |
849 | int fd; |
850 | static int o_cloexec = O_CLOEXEC; | |
a0788266 | 851 | |
1e3001a8 JH |
852 | fd = open(name, flags | o_cloexec); |
853 | if ((o_cloexec & O_CLOEXEC) && fd < 0 && errno == EINVAL) { | |
cd66ada0 | 854 | /* Try again w/o O_CLOEXEC: the kernel might not support it */ |
1e3001a8 JH |
855 | o_cloexec &= ~O_CLOEXEC; |
856 | fd = open(name, flags | o_cloexec); | |
491a8dec | 857 | } |
491a8dec | 858 | |
9fb9495d | 859 | #if defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC) |
491a8dec | 860 | { |
1e3001a8 | 861 | static int fd_cloexec = FD_CLOEXEC; |
a0788266 | 862 | |
1e3001a8 JH |
863 | if (!o_cloexec && 0 <= fd && fd_cloexec) { |
864 | /* Opened w/o O_CLOEXEC? try with fcntl(2) to add it */ | |
9fb9495d EW |
865 | int flags = fcntl(fd, F_GETFD); |
866 | if (fcntl(fd, F_SETFD, flags | fd_cloexec)) | |
1e3001a8 | 867 | fd_cloexec = 0; |
cd66ada0 | 868 | } |
44d1c19e | 869 | } |
a0788266 | 870 | #endif |
1b8ac5ea | 871 | return fd; |
a0788266 JS |
872 | } |
873 | ||
3cf8b462 | 874 | /* |
771e7d57 JK |
875 | * Find "sha1" as a loose object in the local repository or in an alternate. |
876 | * Returns 0 on success, negative on failure. | |
877 | * | |
878 | * The "path" out-parameter will give the path of the object we found (if any). | |
879 | * Note that it may point to static storage and is only valid until another | |
f3f043a1 | 880 | * call to stat_sha1_file(). |
3cf8b462 | 881 | */ |
d2607fa0 SB |
882 | static int stat_sha1_file(struct repository *r, const unsigned char *sha1, |
883 | struct stat *st, const char **path) | |
1f688557 | 884 | { |
263db403 | 885 | struct object_directory *odb; |
ea657730 CC |
886 | static struct strbuf buf = STRBUF_INIT; |
887 | ||
d2607fa0 | 888 | prepare_alt_odb(r); |
f0eaf638 JK |
889 | for (odb = r->objects->odb; odb; odb = odb->next) { |
890 | *path = odb_loose_path(odb, &buf, sha1); | |
771e7d57 | 891 | if (!lstat(*path, st)) |
052fe5ea | 892 | return 0; |
c7934306 SP |
893 | } |
894 | ||
3cf8b462 SP |
895 | return -1; |
896 | } | |
897 | ||
771e7d57 JK |
898 | /* |
899 | * Like stat_sha1_file(), but actually open the object and return the | |
900 | * descriptor. See the caveats on the "path" parameter above. | |
901 | */ | |
ec7283e5 SB |
902 | static int open_sha1_file(struct repository *r, |
903 | const unsigned char *sha1, const char **path) | |
60bb8b14 | 904 | { |
44d1c19e | 905 | int fd; |
263db403 | 906 | struct object_directory *odb; |
f0eaf638 | 907 | int most_interesting_errno = ENOENT; |
ea657730 CC |
908 | static struct strbuf buf = STRBUF_INIT; |
909 | ||
ec7283e5 | 910 | prepare_alt_odb(r); |
f0eaf638 JK |
911 | for (odb = r->objects->odb; odb; odb = odb->next) { |
912 | *path = odb_loose_path(odb, &buf, sha1); | |
771e7d57 | 913 | fd = git_open(*path); |
44d1c19e LT |
914 | if (fd >= 0) |
915 | return fd; | |
f0eaf638 | 916 | |
d6c8a05b JK |
917 | if (most_interesting_errno == ENOENT) |
918 | most_interesting_errno = errno; | |
03e79c88 | 919 | } |
d6c8a05b | 920 | errno = most_interesting_errno; |
44d1c19e | 921 | return -1; |
1f688557 JH |
922 | } |
923 | ||
61c7711c JK |
924 | static int quick_has_loose(struct repository *r, |
925 | const unsigned char *sha1) | |
926 | { | |
61c7711c JK |
927 | struct object_id oid; |
928 | struct object_directory *odb; | |
929 | ||
930 | hashcpy(oid.hash, sha1); | |
931 | ||
932 | prepare_alt_odb(r); | |
933 | for (odb = r->objects->odb; odb; odb = odb->next) { | |
0000d654 | 934 | if (oid_array_lookup(odb_loose_cache(odb, &oid), &oid) >= 0) |
61c7711c JK |
935 | return 1; |
936 | } | |
937 | return 0; | |
938 | } | |
939 | ||
f6371f92 JK |
940 | /* |
941 | * Map the loose object at "path" if it is not NULL, or the path found by | |
942 | * searching for a loose object named "sha1". | |
943 | */ | |
1fea63e1 JN |
944 | static void *map_sha1_file_1(struct repository *r, const char *path, |
945 | const unsigned char *sha1, unsigned long *size) | |
27d69a46 | 946 | { |
0fcfd160 | 947 | void *map; |
144bde78 | 948 | int fd; |
84dd81c1 | 949 | |
f6371f92 JK |
950 | if (path) |
951 | fd = git_open(path); | |
8261e1f1 | 952 | else |
1fea63e1 | 953 | fd = open_sha1_file(r, sha1, &path); |
44d1c19e LT |
954 | map = NULL; |
955 | if (fd >= 0) { | |
956 | struct stat st; | |
1f688557 | 957 | |
44d1c19e LT |
958 | if (!fstat(fd, &st)) { |
959 | *size = xsize_t(st.st_size); | |
33e42de0 MM |
960 | if (!*size) { |
961 | /* mmap() is forbidden on empty files */ | |
259328b7 | 962 | error(_("object file %s is empty"), path); |
6881925e | 963 | close(fd); |
33e42de0 MM |
964 | return NULL; |
965 | } | |
44d1c19e | 966 | map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0); |
144bde78 | 967 | } |
44d1c19e | 968 | close(fd); |
74e34e1f | 969 | } |
0fcfd160 | 970 | return map; |
74e34e1f NP |
971 | } |
972 | ||
bd27f50c SB |
973 | void *map_sha1_file(struct repository *r, |
974 | const unsigned char *sha1, unsigned long *size) | |
068f85e3 | 975 | { |
bd27f50c | 976 | return map_sha1_file_1(r, NULL, sha1, size); |
068f85e3 | 977 | } |
978 | ||
d21f8426 JH |
979 | static int unpack_sha1_short_header(git_zstream *stream, |
980 | unsigned char *map, unsigned long mapsize, | |
981 | void *buffer, unsigned long bufsiz) | |
47fe3f6e | 982 | { |
c4483576 LT |
983 | /* Get the data stream */ |
984 | memset(stream, 0, sizeof(*stream)); | |
985 | stream->next_in = map; | |
986 | stream->avail_in = mapsize; | |
987 | stream->next_out = buffer; | |
93821bd9 | 988 | stream->avail_out = bufsiz; |
47fe3f6e | 989 | |
39c68542 | 990 | git_inflate_init(stream); |
cc5c54e7 | 991 | return git_inflate(stream, 0); |
9a217f2a JH |
992 | } |
993 | ||
d21f8426 JH |
994 | int unpack_sha1_header(git_zstream *stream, |
995 | unsigned char *map, unsigned long mapsize, | |
996 | void *buffer, unsigned long bufsiz) | |
1f688557 | 997 | { |
d21f8426 JH |
998 | int status = unpack_sha1_short_header(stream, map, mapsize, |
999 | buffer, bufsiz); | |
42873078 | 1000 | |
d21f8426 JH |
1001 | if (status < Z_OK) |
1002 | return status; | |
628522ec | 1003 | |
d21f8426 JH |
1004 | /* Make sure we have the terminating NUL */ |
1005 | if (!memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) | |
1006 | return -1; | |
1f688557 JH |
1007 | return 0; |
1008 | } | |
1009 | ||
46f03448 KN |
1010 | static int unpack_sha1_header_to_strbuf(git_zstream *stream, unsigned char *map, |
1011 | unsigned long mapsize, void *buffer, | |
1012 | unsigned long bufsiz, struct strbuf *header) | |
d131b7af | 1013 | { |
46f03448 KN |
1014 | int status; |
1015 | ||
d21f8426 JH |
1016 | status = unpack_sha1_short_header(stream, map, mapsize, buffer, bufsiz); |
1017 | if (status < Z_OK) | |
1018 | return -1; | |
d131b7af | 1019 | |
46f03448 KN |
1020 | /* |
1021 | * Check if entire header is unpacked in the first iteration. | |
d131b7af | 1022 | */ |
46f03448 KN |
1023 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) |
1024 | return 0; | |
d131b7af | 1025 | |
46f03448 KN |
1026 | /* |
1027 | * buffer[0..bufsiz] was not large enough. Copy the partial | |
1028 | * result out to header, and then append the result of further | |
1029 | * reading the stream. | |
1030 | */ | |
1031 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); | |
1032 | stream->next_out = buffer; | |
1033 | stream->avail_out = bufsiz; | |
d131b7af | 1034 | |
46f03448 KN |
1035 | do { |
1036 | status = git_inflate(stream, 0); | |
1037 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); | |
1038 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) | |
1039 | return 0; | |
1040 | stream->next_out = buffer; | |
1041 | stream->avail_out = bufsiz; | |
1042 | } while (status != Z_STREAM_END); | |
1043 | return -1; | |
d131b7af SP |
1044 | } |
1045 | ||
ef49a7a0 | 1046 | static void *unpack_sha1_rest(git_zstream *stream, void *buffer, unsigned long size, const unsigned char *sha1) |
95099731 | 1047 | { |
5180cacc | 1048 | int bytes = strlen(buffer) + 1; |
3aee68aa | 1049 | unsigned char *buf = xmallocz(size); |
93821bd9 | 1050 | unsigned long n; |
7efbff75 | 1051 | int status = Z_OK; |
95099731 | 1052 | |
93821bd9 LT |
1053 | n = stream->total_out - bytes; |
1054 | if (n > size) | |
1055 | n = size; | |
1056 | memcpy(buf, (char *) buffer + bytes, n); | |
1057 | bytes = n; | |
456cdf6e LT |
1058 | if (bytes <= size) { |
1059 | /* | |
1060 | * The above condition must be (bytes <= size), not | |
1061 | * (bytes < size). In other words, even though we | |
ccf5ace0 | 1062 | * expect no more output and set avail_out to zero, |
456cdf6e LT |
1063 | * the input zlib stream may have bytes that express |
1064 | * "this concludes the stream", and we *do* want to | |
1065 | * eat that input. | |
1066 | * | |
1067 | * Otherwise we would not be able to test that we | |
1068 | * consumed all the input to reach the expected size; | |
1069 | * we also want to check that zlib tells us that all | |
1070 | * went well with status == Z_STREAM_END at the end. | |
1071 | */ | |
5180cacc LT |
1072 | stream->next_out = buf + bytes; |
1073 | stream->avail_out = size - bytes; | |
7efbff75 | 1074 | while (status == Z_OK) |
39c68542 | 1075 | status = git_inflate(stream, Z_FINISH); |
5180cacc | 1076 | } |
456cdf6e | 1077 | if (status == Z_STREAM_END && !stream->avail_in) { |
39c68542 | 1078 | git_inflate_end(stream); |
7efbff75 | 1079 | return buf; |
95099731 NTND |
1080 | } |
1081 | ||
7efbff75 | 1082 | if (status < 0) |
259328b7 | 1083 | error(_("corrupt loose object '%s'"), sha1_to_hex(sha1)); |
7efbff75 | 1084 | else if (stream->avail_in) |
259328b7 | 1085 | error(_("garbage at end of loose object '%s'"), |
7efbff75 JH |
1086 | sha1_to_hex(sha1)); |
1087 | free(buf); | |
1088 | return NULL; | |
95099731 NTND |
1089 | } |
1090 | ||
d40d535b | 1091 | /* |
5180cacc LT |
1092 | * We used to just use "sscanf()", but that's actually way |
1093 | * too permissive for what we want to check. So do an anal | |
1094 | * object header parse by hand. | |
d40d535b | 1095 | */ |
46f03448 KN |
1096 | static int parse_sha1_header_extended(const char *hdr, struct object_info *oi, |
1097 | unsigned int flags) | |
1f688557 | 1098 | { |
46f03448 | 1099 | const char *type_buf = hdr; |
5180cacc | 1100 | unsigned long size; |
46f03448 | 1101 | int type, type_len = 0; |
43057304 | 1102 | |
5180cacc | 1103 | /* |
46f03448 | 1104 | * The type can be of any size but is followed by |
21666f1a | 1105 | * a space. |
5180cacc | 1106 | */ |
5180cacc LT |
1107 | for (;;) { |
1108 | char c = *hdr++; | |
d21f8426 JH |
1109 | if (!c) |
1110 | return -1; | |
5180cacc LT |
1111 | if (c == ' ') |
1112 | break; | |
46f03448 | 1113 | type_len++; |
5180cacc | 1114 | } |
1f688557 | 1115 | |
46f03448 | 1116 | type = type_from_string_gently(type_buf, type_len, 1); |
6ca32f47 BW |
1117 | if (oi->type_name) |
1118 | strbuf_add(oi->type_name, type_buf, type_len); | |
46f03448 KN |
1119 | /* |
1120 | * Set type to 0 if its an unknown object and | |
2e3a16b2 | 1121 | * we're obtaining the type using '--allow-unknown-type' |
46f03448 KN |
1122 | * option. |
1123 | */ | |
19fc5e84 | 1124 | if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE) && (type < 0)) |
46f03448 KN |
1125 | type = 0; |
1126 | else if (type < 0) | |
259328b7 | 1127 | die(_("invalid object type")); |
46f03448 KN |
1128 | if (oi->typep) |
1129 | *oi->typep = type; | |
5180cacc LT |
1130 | |
1131 | /* | |
1132 | * The length must follow immediately, and be in canonical | |
1133 | * decimal format (ie "010" is not valid). | |
1134 | */ | |
1135 | size = *hdr++ - '0'; | |
1136 | if (size > 9) | |
1137 | return -1; | |
1138 | if (size) { | |
1139 | for (;;) { | |
1140 | unsigned long c = *hdr - '0'; | |
1141 | if (c > 9) | |
1142 | break; | |
1143 | hdr++; | |
1144 | size = size * 10 + c; | |
1b1005d1 | 1145 | } |
c01f51cc | 1146 | } |
46f03448 KN |
1147 | |
1148 | if (oi->sizep) | |
1149 | *oi->sizep = size; | |
5180cacc LT |
1150 | |
1151 | /* | |
1152 | * The length must be followed by a zero byte | |
1153 | */ | |
46f03448 | 1154 | return *hdr ? -1 : type; |
1f688557 JH |
1155 | } |
1156 | ||
46f03448 | 1157 | int parse_sha1_header(const char *hdr, unsigned long *sizep) |
bf592c50 | 1158 | { |
27b5c1a0 | 1159 | struct object_info oi = OBJECT_INFO_INIT; |
21666f1a | 1160 | |
46f03448 | 1161 | oi.sizep = sizep; |
1f0c0d36 | 1162 | return parse_sha1_header_extended(hdr, &oi, 0); |
bf592c50 DB |
1163 | } |
1164 | ||
4a7c05f7 JN |
1165 | static int sha1_loose_object_info(struct repository *r, |
1166 | const unsigned char *sha1, | |
1167 | struct object_info *oi, int flags) | |
65c2e0c3 | 1168 | { |
46f03448 KN |
1169 | int status = 0; |
1170 | unsigned long mapsize; | |
65c2e0c3 | 1171 | void *map; |
ef49a7a0 | 1172 | git_zstream stream; |
1af64f73 | 1173 | char hdr[MAX_HEADER_LEN]; |
46f03448 | 1174 | struct strbuf hdrbuf = STRBUF_INIT; |
c84a1f3e | 1175 | unsigned long size_scratch; |
65c2e0c3 | 1176 | |
5d642e75 JK |
1177 | if (oi->delta_base_sha1) |
1178 | hashclr(oi->delta_base_sha1); | |
1179 | ||
052fe5ea JK |
1180 | /* |
1181 | * If we don't care about type or size, then we don't | |
4ef8d1dd JH |
1182 | * need to look inside the object at all. Note that we |
1183 | * do not optimize out the stat call, even if the | |
1184 | * caller doesn't care about the disk-size, since our | |
1185 | * return value implicitly indicates whether the | |
1186 | * object even exists. | |
052fe5ea | 1187 | */ |
6ca32f47 | 1188 | if (!oi->typep && !oi->type_name && !oi->sizep && !oi->contentp) { |
771e7d57 | 1189 | const char *path; |
4ef8d1dd | 1190 | struct stat st; |
61c7711c JK |
1191 | if (!oi->disk_sizep && (flags & OBJECT_INFO_QUICK)) |
1192 | return quick_has_loose(r, sha1) ? 0 : -1; | |
4a7c05f7 | 1193 | if (stat_sha1_file(r, sha1, &st, &path) < 0) |
4ef8d1dd JH |
1194 | return -1; |
1195 | if (oi->disk_sizep) | |
23c339c0 | 1196 | *oi->disk_sizep = st.st_size; |
052fe5ea JK |
1197 | return 0; |
1198 | } | |
1199 | ||
4a7c05f7 | 1200 | map = map_sha1_file(r, sha1, &mapsize); |
f0df4ed5 | 1201 | if (!map) |
dbea72a8 | 1202 | return -1; |
c84a1f3e JT |
1203 | |
1204 | if (!oi->sizep) | |
1205 | oi->sizep = &size_scratch; | |
1206 | ||
23c339c0 JK |
1207 | if (oi->disk_sizep) |
1208 | *oi->disk_sizep = mapsize; | |
19fc5e84 | 1209 | if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE)) { |
46f03448 | 1210 | if (unpack_sha1_header_to_strbuf(&stream, map, mapsize, hdr, sizeof(hdr), &hdrbuf) < 0) |
259328b7 | 1211 | status = error(_("unable to unpack %s header with --allow-unknown-type"), |
46f03448 KN |
1212 | sha1_to_hex(sha1)); |
1213 | } else if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) | |
259328b7 | 1214 | status = error(_("unable to unpack %s header"), |
36e4d74a | 1215 | sha1_to_hex(sha1)); |
46f03448 KN |
1216 | if (status < 0) |
1217 | ; /* Do nothing */ | |
1218 | else if (hdrbuf.len) { | |
1219 | if ((status = parse_sha1_header_extended(hdrbuf.buf, oi, flags)) < 0) | |
259328b7 | 1220 | status = error(_("unable to parse %s header with --allow-unknown-type"), |
46f03448 KN |
1221 | sha1_to_hex(sha1)); |
1222 | } else if ((status = parse_sha1_header_extended(hdr, oi, flags)) < 0) | |
259328b7 | 1223 | status = error(_("unable to parse %s header"), sha1_to_hex(sha1)); |
c84a1f3e | 1224 | |
b3ea7dd3 | 1225 | if (status >= 0 && oi->contentp) { |
c84a1f3e JT |
1226 | *oi->contentp = unpack_sha1_rest(&stream, hdr, |
1227 | *oi->sizep, sha1); | |
b3ea7dd3 JK |
1228 | if (!*oi->contentp) { |
1229 | git_inflate_end(&stream); | |
1230 | status = -1; | |
1231 | } | |
1232 | } else | |
c84a1f3e JT |
1233 | git_inflate_end(&stream); |
1234 | ||
65c2e0c3 | 1235 | munmap(map, mapsize); |
46f03448 | 1236 | if (status && oi->typep) |
23c339c0 | 1237 | *oi->typep = status; |
c84a1f3e JT |
1238 | if (oi->sizep == &size_scratch) |
1239 | oi->sizep = NULL; | |
46f03448 | 1240 | strbuf_release(&hdrbuf); |
3ab0fb06 | 1241 | oi->whence = OI_LOOSE; |
93cff9a9 | 1242 | return (status < 0) ? status : 0; |
65c2e0c3 JH |
1243 | } |
1244 | ||
8b4c0103 JT |
1245 | int fetch_if_missing = 1; |
1246 | ||
9d98354f SB |
1247 | int oid_object_info_extended(struct repository *r, const struct object_id *oid, |
1248 | struct object_info *oi, unsigned flags) | |
f0df4ed5 | 1249 | { |
cd585e2a | 1250 | static struct object_info blank_oi = OBJECT_INFO_INIT; |
f0df4ed5 | 1251 | struct pack_entry e; |
5b086407 | 1252 | int rtype; |
b383a13c | 1253 | const struct object_id *real = oid; |
8b4c0103 | 1254 | int already_retried = 0; |
f0df4ed5 | 1255 | |
b383a13c | 1256 | if (flags & OBJECT_INFO_LOOKUP_REPLACE) |
9d98354f | 1257 | real = lookup_replace_object(r, oid); |
f0df4ed5 | 1258 | |
b383a13c | 1259 | if (is_null_oid(real)) |
87b5e236 JK |
1260 | return -1; |
1261 | ||
cd585e2a JT |
1262 | if (!oi) |
1263 | oi = &blank_oi; | |
1264 | ||
dfdd4afc | 1265 | if (!(flags & OBJECT_INFO_SKIP_CACHED)) { |
62ba93ea | 1266 | struct cached_object *co = find_cached_object(real); |
dfdd4afc JT |
1267 | if (co) { |
1268 | if (oi->typep) | |
1269 | *(oi->typep) = co->type; | |
1270 | if (oi->sizep) | |
1271 | *(oi->sizep) = co->size; | |
1272 | if (oi->disk_sizep) | |
1273 | *(oi->disk_sizep) = 0; | |
1274 | if (oi->delta_base_sha1) | |
1275 | hashclr(oi->delta_base_sha1); | |
6ca32f47 | 1276 | if (oi->type_name) |
debca9d2 | 1277 | strbuf_addstr(oi->type_name, type_name(co->type)); |
dfdd4afc JT |
1278 | if (oi->contentp) |
1279 | *oi->contentp = xmemdupz(co->buf, co->size); | |
1280 | oi->whence = OI_CACHED; | |
1281 | return 0; | |
1282 | } | |
c4d9986f NTND |
1283 | } |
1284 | ||
8b4c0103 | 1285 | while (1) { |
42c8ce1c | 1286 | if (find_pack_entry(r, real, &e)) |
8b4c0103 JT |
1287 | break; |
1288 | ||
024aa469 TI |
1289 | if (flags & OBJECT_INFO_IGNORE_LOOSE) |
1290 | return -1; | |
1291 | ||
ddd63e64 | 1292 | /* Most likely it's a loose object. */ |
9d98354f | 1293 | if (!sha1_loose_object_info(r, real->hash, oi, flags)) |
5b086407 | 1294 | return 0; |
ddd63e64 SG |
1295 | |
1296 | /* Not a loose object; someone else may have just packed it. */ | |
2b7750c9 | 1297 | if (!(flags & OBJECT_INFO_QUICK)) { |
9d98354f | 1298 | reprepare_packed_git(r); |
42c8ce1c | 1299 | if (find_pack_entry(r, real, &e)) |
2b7750c9 JT |
1300 | break; |
1301 | } | |
8b4c0103 JT |
1302 | |
1303 | /* Check if it is a missing object */ | |
1304 | if (fetch_if_missing && repository_format_partial_clone && | |
9d98354f | 1305 | !already_retried && r == the_repository) { |
8b4c0103 | 1306 | /* |
9d98354f | 1307 | * TODO Investigate having fetch_object() return |
8b4c0103 | 1308 | * TODO error/success and stopping the music here. |
9d98354f SB |
1309 | * TODO Pass a repository struct through fetch_object, |
1310 | * such that arbitrary repositories work. | |
8b4c0103 | 1311 | */ |
8708ca09 | 1312 | fetch_objects(repository_format_partial_clone, real, 1); |
8b4c0103 JT |
1313 | already_retried = 1; |
1314 | continue; | |
dfdd4afc | 1315 | } |
8b4c0103 JT |
1316 | |
1317 | return -1; | |
f0df4ed5 | 1318 | } |
3d77d877 | 1319 | |
cd585e2a JT |
1320 | if (oi == &blank_oi) |
1321 | /* | |
1322 | * We know that the caller doesn't actually need the | |
1323 | * information below, so return early. | |
1324 | */ | |
1325 | return 0; | |
9d98354f | 1326 | rtype = packed_object_info(r, e.p, e.offset, oi); |
412916ee | 1327 | if (rtype < 0) { |
b383a13c | 1328 | mark_bad_packed_object(e.p, real->hash); |
9d98354f | 1329 | return oid_object_info_extended(r, real, oi, 0); |
3ab0fb06 | 1330 | } else if (oi->whence == OI_PACKED) { |
9a490590 JH |
1331 | oi->u.packed.offset = e.offset; |
1332 | oi->u.packed.pack = e.p; | |
1333 | oi->u.packed.is_delta = (rtype == OBJ_REF_DELTA || | |
1334 | rtype == OBJ_OFS_DELTA); | |
3d77d877 NP |
1335 | } |
1336 | ||
5b086407 | 1337 | return 0; |
f0df4ed5 JS |
1338 | } |
1339 | ||
3fc0dca9 | 1340 | /* returns enum object_type or negative */ |
9d98354f SB |
1341 | int oid_object_info(struct repository *r, |
1342 | const struct object_id *oid, | |
1343 | unsigned long *sizep) | |
9a490590 | 1344 | { |
5b086407 | 1345 | enum object_type type; |
27b5c1a0 | 1346 | struct object_info oi = OBJECT_INFO_INIT; |
9a490590 | 1347 | |
5b086407 | 1348 | oi.typep = &type; |
9a490590 | 1349 | oi.sizep = sizep; |
9d98354f SB |
1350 | if (oid_object_info_extended(r, oid, &oi, |
1351 | OBJECT_INFO_LOOKUP_REPLACE) < 0) | |
5b086407 JK |
1352 | return -1; |
1353 | return type; | |
9a490590 JH |
1354 | } |
1355 | ||
f1d8130b JT |
1356 | static void *read_object(const unsigned char *sha1, enum object_type *type, |
1357 | unsigned long *size) | |
1358 | { | |
7984f238 | 1359 | struct object_id oid; |
f1d8130b JT |
1360 | struct object_info oi = OBJECT_INFO_INIT; |
1361 | void *content; | |
1362 | oi.typep = type; | |
1363 | oi.sizep = size; | |
1364 | oi.contentp = &content; | |
1365 | ||
7984f238 | 1366 | hashcpy(oid.hash, sha1); |
1367 | ||
7ecd8690 | 1368 | if (oid_object_info_extended(the_repository, &oid, &oi, 0) < 0) |
f1d8130b JT |
1369 | return NULL; |
1370 | return content; | |
1371 | } | |
1372 | ||
829e5c3b PO |
1373 | int pretend_object_file(void *buf, unsigned long len, enum object_type type, |
1374 | struct object_id *oid) | |
d66b37bb JH |
1375 | { |
1376 | struct cached_object *co; | |
1377 | ||
169c9c01 | 1378 | hash_object_file(buf, len, type_name(type), oid); |
62ba93ea | 1379 | if (has_sha1_file(oid->hash) || find_cached_object(oid)) |
d66b37bb | 1380 | return 0; |
c7353967 | 1381 | ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc); |
d66b37bb JH |
1382 | co = &cached_objects[cached_object_nr++]; |
1383 | co->size = len; | |
21666f1a | 1384 | co->type = type; |
efa13f7b JH |
1385 | co->buf = xmalloc(len); |
1386 | memcpy(co->buf, buf, len); | |
62ba93ea | 1387 | oidcpy(&co->oid, oid); |
d66b37bb JH |
1388 | return 0; |
1389 | } | |
1390 | ||
b6c4cecc JH |
1391 | /* |
1392 | * This function dies on corrupt objects; the callers who want to | |
1393 | * deal with them should arrange to call read_object() and give error | |
1394 | * messages themselves. | |
1395 | */ | |
b4f5aca4 | 1396 | void *read_object_file_extended(const struct object_id *oid, |
1397 | enum object_type *type, | |
1398 | unsigned long *size, | |
1399 | int lookup_replace) | |
ac939109 | 1400 | { |
3ba7a065 | 1401 | void *data; |
b6c4cecc | 1402 | const struct packed_git *p; |
771e7d57 JK |
1403 | const char *path; |
1404 | struct stat st; | |
1f2e7cea SB |
1405 | const struct object_id *repl = lookup_replace ? |
1406 | lookup_replace_object(the_repository, oid) : oid; | |
b6c4cecc | 1407 | |
3ba7a065 | 1408 | errno = 0; |
b383a13c | 1409 | data = read_object(repl->hash, type, size); |
4bbf5a26 | 1410 | if (data) |
b6c4cecc | 1411 | return data; |
68095570 | 1412 | |
25f3af3f | 1413 | if (errno && errno != ENOENT) |
259328b7 | 1414 | die_errno(_("failed to read object %s"), oid_to_hex(oid)); |
3ba7a065 | 1415 | |
68095570 | 1416 | /* die if we replaced an object with one that does not exist */ |
b383a13c | 1417 | if (repl != oid) |
259328b7 | 1418 | die(_("replacement %s not found for %s"), |
b383a13c | 1419 | oid_to_hex(repl), oid_to_hex(oid)); |
68095570 | 1420 | |
cf0b1793 | 1421 | if (!stat_sha1_file(the_repository, repl->hash, &st, &path)) |
259328b7 | 1422 | die(_("loose object %s (stored in %s) is corrupt"), |
b383a13c | 1423 | oid_to_hex(repl), path); |
68095570 | 1424 | |
b383a13c | 1425 | if ((p = has_packed_and_bad(repl->hash)) != NULL) |
259328b7 | 1426 | die(_("packed object %s (stored in %s) is corrupt"), |
b383a13c | 1427 | oid_to_hex(repl), p->pack_name); |
f5552aee | 1428 | |
b6c4cecc | 1429 | return NULL; |
ac939109 NP |
1430 | } |
1431 | ||
02f0547e | 1432 | void *read_object_with_reference(const struct object_id *oid, |
21666f1a | 1433 | const char *required_type_name, |
40469ee9 | 1434 | unsigned long *size, |
02f0547e | 1435 | struct object_id *actual_oid_return) |
f4913f91 | 1436 | { |
21666f1a | 1437 | enum object_type type, required_type; |
f4913f91 JH |
1438 | void *buffer; |
1439 | unsigned long isize; | |
02f0547e | 1440 | struct object_id actual_oid; |
f4913f91 | 1441 | |
21666f1a | 1442 | required_type = type_from_string(required_type_name); |
02f0547e | 1443 | oidcpy(&actual_oid, oid); |
40469ee9 JH |
1444 | while (1) { |
1445 | int ref_length = -1; | |
1446 | const char *ref_type = NULL; | |
f4913f91 | 1447 | |
b4f5aca4 | 1448 | buffer = read_object_file(&actual_oid, &type, &isize); |
40469ee9 JH |
1449 | if (!buffer) |
1450 | return NULL; | |
21666f1a | 1451 | if (type == required_type) { |
40469ee9 | 1452 | *size = isize; |
02f0547e | 1453 | if (actual_oid_return) |
1454 | oidcpy(actual_oid_return, &actual_oid); | |
40469ee9 JH |
1455 | return buffer; |
1456 | } | |
1457 | /* Handle references */ | |
21666f1a | 1458 | else if (type == OBJ_COMMIT) |
40469ee9 | 1459 | ref_type = "tree "; |
21666f1a | 1460 | else if (type == OBJ_TAG) |
40469ee9 JH |
1461 | ref_type = "object "; |
1462 | else { | |
1463 | free(buffer); | |
1464 | return NULL; | |
1465 | } | |
1466 | ref_length = strlen(ref_type); | |
f4913f91 | 1467 | |
94b5e093 | 1468 | if (ref_length + the_hash_algo->hexsz > isize || |
50974ec9 | 1469 | memcmp(buffer, ref_type, ref_length) || |
02f0547e | 1470 | get_oid_hex((char *) buffer + ref_length, &actual_oid)) { |
40469ee9 JH |
1471 | free(buffer); |
1472 | return NULL; | |
1473 | } | |
1cf58e72 | 1474 | free(buffer); |
40469ee9 | 1475 | /* Now we have the ID of the referred-to object in |
02f0547e | 1476 | * actual_oid. Check again. */ |
f4913f91 | 1477 | } |
f4913f91 JH |
1478 | } |
1479 | ||
a09c985e PO |
1480 | static void write_object_file_prepare(const void *buf, unsigned long len, |
1481 | const char *type, struct object_id *oid, | |
1482 | char *hdr, int *hdrlen) | |
d410c0f5 | 1483 | { |
18e2588e | 1484 | git_hash_ctx c; |
d410c0f5 JH |
1485 | |
1486 | /* Generate the header */ | |
ca473cef | 1487 | *hdrlen = xsnprintf(hdr, *hdrlen, "%s %"PRIuMAX , type, (uintmax_t)len)+1; |
d410c0f5 JH |
1488 | |
1489 | /* Sha1.. */ | |
18e2588e | 1490 | the_hash_algo->init_fn(&c); |
1491 | the_hash_algo->update_fn(&c, hdr, *hdrlen); | |
1492 | the_hash_algo->update_fn(&c, buf, len); | |
0fd90dab | 1493 | the_hash_algo->final_fn(oid->hash, &c); |
d410c0f5 JH |
1494 | } |
1495 | ||
230f1322 | 1496 | /* |
5a688fe4 | 1497 | * Move the just written object into its final resting place. |
230f1322 | 1498 | */ |
cb5add58 | 1499 | int finalize_object_file(const char *tmpfile, const char *filename) |
230f1322 | 1500 | { |
e32c0a9c | 1501 | int ret = 0; |
5a688fe4 | 1502 | |
348df166 | 1503 | if (object_creation_mode == OBJECT_CREATION_USES_RENAMES) |
be66a6c4 JS |
1504 | goto try_rename; |
1505 | else if (link(tmpfile, filename)) | |
e32c0a9c | 1506 | ret = errno; |
7ebb6fca LT |
1507 | |
1508 | /* | |
1509 | * Coda hack - coda doesn't like cross-directory links, | |
1510 | * so we fall back to a rename, which will mean that it | |
1511 | * won't be able to check collisions, but that's not a | |
1512 | * big deal. | |
1513 | * | |
1514 | * The same holds for FAT formatted media. | |
1515 | * | |
3be1f18e | 1516 | * When this succeeds, we just return. We have nothing |
7ebb6fca LT |
1517 | * left to unlink. |
1518 | */ | |
1519 | if (ret && ret != EEXIST) { | |
be66a6c4 | 1520 | try_rename: |
7ebb6fca | 1521 | if (!rename(tmpfile, filename)) |
3be1f18e | 1522 | goto out; |
9e48b389 | 1523 | ret = errno; |
230f1322 | 1524 | } |
691f1a28 | 1525 | unlink_or_warn(tmpfile); |
230f1322 LT |
1526 | if (ret) { |
1527 | if (ret != EEXIST) { | |
259328b7 | 1528 | return error_errno(_("unable to write sha1 filename %s"), filename); |
230f1322 LT |
1529 | } |
1530 | /* FIXME!!! Collision check here ? */ | |
1531 | } | |
1532 | ||
3be1f18e | 1533 | out: |
5256b006 | 1534 | if (adjust_shared_perm(filename)) |
259328b7 | 1535 | return error(_("unable to set permission to '%s'"), filename); |
230f1322 LT |
1536 | return 0; |
1537 | } | |
1538 | ||
4d548150 LT |
1539 | static int write_buffer(int fd, const void *buf, size_t len) |
1540 | { | |
d34cf19b | 1541 | if (write_in_full(fd, buf, len) < 0) |
259328b7 | 1542 | return error_errno(_("file write error")); |
4d548150 LT |
1543 | return 0; |
1544 | } | |
1545 | ||
f070facc PO |
1546 | int hash_object_file(const void *buf, unsigned long len, const char *type, |
1547 | struct object_id *oid) | |
abdc3fc8 | 1548 | { |
1af64f73 | 1549 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 1550 | int hdrlen = sizeof(hdr); |
a09c985e | 1551 | write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen); |
abdc3fc8 RS |
1552 | return 0; |
1553 | } | |
1554 | ||
e9039dd3 LT |
1555 | /* Finalize a file on disk, and close it. */ |
1556 | static void close_sha1_file(int fd) | |
1557 | { | |
aafe9fba LT |
1558 | if (fsync_object_files) |
1559 | fsync_or_die(fd, "sha1 file"); | |
e9039dd3 | 1560 | if (close(fd) != 0) |
259328b7 | 1561 | die_errno(_("error when closing sha1 file")); |
e9039dd3 LT |
1562 | } |
1563 | ||
5723fe7e LT |
1564 | /* Size of directory component, including the ending '/' */ |
1565 | static inline int directory_size(const char *filename) | |
1566 | { | |
1567 | const char *s = strrchr(filename, '/'); | |
1568 | if (!s) | |
1569 | return 0; | |
1570 | return s - filename + 1; | |
1571 | } | |
1572 | ||
1573 | /* | |
1574 | * This creates a temporary file in the same directory as the final | |
1575 | * 'filename' | |
1576 | * | |
1577 | * We want to avoid cross-directory filename renames, because those | |
1578 | * can have problems on various filesystems (FAT, NFS, Coda). | |
1579 | */ | |
d4b3d11a | 1580 | static int create_tmpfile(struct strbuf *tmp, const char *filename) |
5723fe7e LT |
1581 | { |
1582 | int fd, dirlen = directory_size(filename); | |
1583 | ||
d4b3d11a JK |
1584 | strbuf_reset(tmp); |
1585 | strbuf_add(tmp, filename, dirlen); | |
1586 | strbuf_addstr(tmp, "tmp_obj_XXXXXX"); | |
1587 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
cbacbf4e | 1588 | if (fd < 0 && dirlen && errno == ENOENT) { |
d4b3d11a JK |
1589 | /* |
1590 | * Make sure the directory exists; note that the contents | |
1591 | * of the buffer are undefined after mkstemp returns an | |
1592 | * error, so we have to rewrite the whole buffer from | |
1593 | * scratch. | |
1594 | */ | |
1595 | strbuf_reset(tmp); | |
1596 | strbuf_add(tmp, filename, dirlen - 1); | |
1597 | if (mkdir(tmp->buf, 0777) && errno != EEXIST) | |
b2476a60 | 1598 | return -1; |
d4b3d11a | 1599 | if (adjust_shared_perm(tmp->buf)) |
5723fe7e LT |
1600 | return -1; |
1601 | ||
1602 | /* Try again */ | |
d4b3d11a JK |
1603 | strbuf_addstr(tmp, "/tmp_obj_XXXXXX"); |
1604 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
5723fe7e LT |
1605 | } |
1606 | return fd; | |
1607 | } | |
1608 | ||
3fc7281f PO |
1609 | static int write_loose_object(const struct object_id *oid, char *hdr, |
1610 | int hdrlen, const void *buf, unsigned long len, | |
1611 | time_t mtime) | |
0fcfd160 | 1612 | { |
915308b1 | 1613 | int fd, ret; |
9892beba | 1614 | unsigned char compressed[4096]; |
ef49a7a0 | 1615 | git_zstream stream; |
18e2588e | 1616 | git_hash_ctx c; |
3fc7281f | 1617 | struct object_id parano_oid; |
d4b3d11a | 1618 | static struct strbuf tmp_file = STRBUF_INIT; |
ea657730 CC |
1619 | static struct strbuf filename = STRBUF_INIT; |
1620 | ||
b69fb867 | 1621 | loose_object_path(the_repository, &filename, oid->hash); |
a44c9a5e | 1622 | |
ea657730 | 1623 | fd = create_tmpfile(&tmp_file, filename.buf); |
aac17941 | 1624 | if (fd < 0) { |
35243577 | 1625 | if (errno == EACCES) |
259328b7 | 1626 | return error(_("insufficient permission for adding an object to repository database %s"), get_object_directory()); |
916d081b | 1627 | else |
259328b7 | 1628 | return error_errno(_("unable to create temporary file")); |
aac17941 LT |
1629 | } |
1630 | ||
0fcfd160 | 1631 | /* Set it up */ |
55bb5c91 | 1632 | git_deflate_init(&stream, zlib_compression_level); |
0fcfd160 | 1633 | stream.next_out = compressed; |
9892beba | 1634 | stream.avail_out = sizeof(compressed); |
18e2588e | 1635 | the_hash_algo->init_fn(&c); |
a44c9a5e LT |
1636 | |
1637 | /* First header.. */ | |
d65a16f6 | 1638 | stream.next_in = (unsigned char *)hdr; |
a44c9a5e | 1639 | stream.avail_in = hdrlen; |
55bb5c91 JH |
1640 | while (git_deflate(&stream, 0) == Z_OK) |
1641 | ; /* nothing */ | |
18e2588e | 1642 | the_hash_algo->update_fn(&c, hdr, hdrlen); |
a44c9a5e LT |
1643 | |
1644 | /* Then the data itself.. */ | |
c00e657d | 1645 | stream.next_in = (void *)buf; |
a44c9a5e | 1646 | stream.avail_in = len; |
9892beba | 1647 | do { |
748af44c | 1648 | unsigned char *in0 = stream.next_in; |
55bb5c91 | 1649 | ret = git_deflate(&stream, Z_FINISH); |
18e2588e | 1650 | the_hash_algo->update_fn(&c, in0, stream.next_in - in0); |
9892beba | 1651 | if (write_buffer(fd, compressed, stream.next_out - compressed) < 0) |
259328b7 | 1652 | die(_("unable to write sha1 file")); |
9892beba NP |
1653 | stream.next_out = compressed; |
1654 | stream.avail_out = sizeof(compressed); | |
1655 | } while (ret == Z_OK); | |
1656 | ||
ac54c277 | 1657 | if (ret != Z_STREAM_END) |
259328b7 | 1658 | die(_("unable to deflate new object %s (%d)"), oid_to_hex(oid), |
3fc7281f | 1659 | ret); |
55bb5c91 | 1660 | ret = git_deflate_end_gently(&stream); |
ac54c277 | 1661 | if (ret != Z_OK) |
259328b7 | 1662 | die(_("deflateEnd on object %s failed (%d)"), oid_to_hex(oid), |
3fc7281f | 1663 | ret); |
18e2588e | 1664 | the_hash_algo->final_fn(parano_oid.hash, &c); |
9001dc2a | 1665 | if (!oideq(oid, ¶no_oid)) |
259328b7 | 1666 | die(_("confused by unstable object source data for %s"), |
3fc7281f | 1667 | oid_to_hex(oid)); |
ac54c277 | 1668 | |
e9039dd3 | 1669 | close_sha1_file(fd); |
0fcfd160 | 1670 | |
bbac7311 NP |
1671 | if (mtime) { |
1672 | struct utimbuf utb; | |
1673 | utb.actime = mtime; | |
1674 | utb.modtime = mtime; | |
d4b3d11a | 1675 | if (utime(tmp_file.buf, &utb) < 0) |
259328b7 | 1676 | warning_errno(_("failed utime() on %s"), tmp_file.buf); |
bbac7311 NP |
1677 | } |
1678 | ||
ea657730 | 1679 | return finalize_object_file(tmp_file.buf, filename.buf); |
0fcfd160 | 1680 | } |
8237b185 | 1681 | |
6862ebbf | 1682 | static int freshen_loose_object(const struct object_id *oid) |
33d4221c | 1683 | { |
6862ebbf | 1684 | return check_and_freshen(oid, 1); |
33d4221c JK |
1685 | } |
1686 | ||
6862ebbf | 1687 | static int freshen_packed_object(const struct object_id *oid) |
33d4221c JK |
1688 | { |
1689 | struct pack_entry e; | |
544443cb | 1690 | if (!find_pack_entry(the_repository, oid, &e)) |
ee1c6c34 JK |
1691 | return 0; |
1692 | if (e.p->freshened) | |
1693 | return 1; | |
1694 | if (!freshen_file(e.p->pack_name)) | |
1695 | return 0; | |
1696 | e.p->freshened = 1; | |
1697 | return 1; | |
33d4221c JK |
1698 | } |
1699 | ||
a09c985e PO |
1700 | int write_object_file(const void *buf, unsigned long len, const char *type, |
1701 | struct object_id *oid) | |
bbac7311 | 1702 | { |
1af64f73 | 1703 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 1704 | int hdrlen = sizeof(hdr); |
bbac7311 NP |
1705 | |
1706 | /* Normally if we have it in the pack then we do not bother writing | |
1707 | * it out into .git/objects/??/?{38} file. | |
1708 | */ | |
a09c985e | 1709 | write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen); |
6862ebbf | 1710 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
bbac7311 | 1711 | return 0; |
3fc7281f | 1712 | return write_loose_object(oid, hdr, hdrlen, buf, len, 0); |
bbac7311 NP |
1713 | } |
1714 | ||
1752cbbc PO |
1715 | int hash_object_file_literally(const void *buf, unsigned long len, |
1716 | const char *type, struct object_id *oid, | |
1717 | unsigned flags) | |
0c3db67c ES |
1718 | { |
1719 | char *header; | |
1720 | int hdrlen, status = 0; | |
1721 | ||
1722 | /* type string, SP, %lu of the length plus NUL must fit this */ | |
1af64f73 | 1723 | hdrlen = strlen(type) + MAX_HEADER_LEN; |
ef1286d3 | 1724 | header = xmalloc(hdrlen); |
a09c985e | 1725 | write_object_file_prepare(buf, len, type, oid, header, &hdrlen); |
0c3db67c ES |
1726 | |
1727 | if (!(flags & HASH_WRITE_OBJECT)) | |
1728 | goto cleanup; | |
6862ebbf | 1729 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
0c3db67c | 1730 | goto cleanup; |
3fc7281f | 1731 | status = write_loose_object(oid, header, hdrlen, buf, len, 0); |
0c3db67c ES |
1732 | |
1733 | cleanup: | |
1734 | free(header); | |
1735 | return status; | |
1736 | } | |
1737 | ||
4bdb70a4 | 1738 | int force_object_loose(const struct object_id *oid, time_t mtime) |
bbac7311 | 1739 | { |
bbac7311 NP |
1740 | void *buf; |
1741 | unsigned long len; | |
1742 | enum object_type type; | |
1af64f73 | 1743 | char hdr[MAX_HEADER_LEN]; |
bbac7311 | 1744 | int hdrlen; |
1fb23e65 | 1745 | int ret; |
bbac7311 | 1746 | |
6862ebbf | 1747 | if (has_loose_object(oid)) |
bbac7311 | 1748 | return 0; |
4bdb70a4 | 1749 | buf = read_object(oid->hash, &type, &len); |
bbac7311 | 1750 | if (!buf) |
259328b7 | 1751 | return error(_("cannot read sha1_file for %s"), oid_to_hex(oid)); |
ca473cef | 1752 | hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(type), (uintmax_t)len) + 1; |
3fc7281f | 1753 | ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime); |
1fb23e65 BS |
1754 | free(buf); |
1755 | ||
1756 | return ret; | |
bbac7311 NP |
1757 | } |
1758 | ||
0eeb077b | 1759 | int has_sha1_file_with_flags(const unsigned char *sha1, int flags) |
8237b185 | 1760 | { |
7984f238 | 1761 | struct object_id oid; |
3e8b7d3c JN |
1762 | if (!startup_info->have_repository) |
1763 | return 0; | |
7984f238 | 1764 | hashcpy(oid.hash, sha1); |
7ecd8690 | 1765 | return oid_object_info_extended(the_repository, &oid, NULL, |
abef9020 | 1766 | flags | OBJECT_INFO_SKIP_CACHED) >= 0; |
b419aa25 | 1767 | } |
1768 | ||
1769 | int has_object_file(const struct object_id *oid) | |
1770 | { | |
1771 | return has_sha1_file(oid->hash); | |
8237b185 | 1772 | } |
74400e71 | 1773 | |
5827a035 JK |
1774 | int has_object_file_with_flags(const struct object_id *oid, int flags) |
1775 | { | |
1776 | return has_sha1_file_with_flags(oid->hash, flags); | |
1777 | } | |
1778 | ||
c879daa2 NTND |
1779 | static void check_tree(const void *buf, size_t size) |
1780 | { | |
1781 | struct tree_desc desc; | |
1782 | struct name_entry entry; | |
1783 | ||
1784 | init_tree_desc(&desc, buf, size); | |
1785 | while (tree_entry(&desc, &entry)) | |
1786 | /* do nothing | |
1787 | * tree_entry() will die() on malformed entries */ | |
1788 | ; | |
1789 | } | |
1790 | ||
1791 | static void check_commit(const void *buf, size_t size) | |
1792 | { | |
1793 | struct commit c; | |
1794 | memset(&c, 0, sizeof(c)); | |
08f4f445 | 1795 | if (parse_commit_buffer(the_repository, &c, buf, size, 0)) |
259328b7 | 1796 | die(_("corrupt commit")); |
c879daa2 NTND |
1797 | } |
1798 | ||
1799 | static void check_tag(const void *buf, size_t size) | |
1800 | { | |
1801 | struct tag t; | |
1802 | memset(&t, 0, sizeof(t)); | |
0e740fed | 1803 | if (parse_tag_buffer(the_repository, &t, buf, size)) |
259328b7 | 1804 | die(_("corrupt tag")); |
c879daa2 NTND |
1805 | } |
1806 | ||
58bf2a4c NTND |
1807 | static int index_mem(struct index_state *istate, |
1808 | struct object_id *oid, void *buf, size_t size, | |
c4ce46fc JH |
1809 | enum object_type type, |
1810 | const char *path, unsigned flags) | |
e7332f96 | 1811 | { |
6c510bee | 1812 | int ret, re_allocated = 0; |
c4ce46fc | 1813 | int write_object = flags & HASH_WRITE_OBJECT; |
74400e71 | 1814 | |
7672db20 | 1815 | if (!type) |
edaec3fb | 1816 | type = OBJ_BLOB; |
6c510bee LT |
1817 | |
1818 | /* | |
1819 | * Convert blobs to git internal format | |
1820 | */ | |
43df4f86 | 1821 | if ((type == OBJ_BLOB) && path) { |
f285a2d7 | 1822 | struct strbuf nbuf = STRBUF_INIT; |
58bf2a4c | 1823 | if (convert_to_git(istate, path, buf, size, &nbuf, |
8462ff43 | 1824 | get_conv_flags(flags))) { |
b315c5c0 | 1825 | buf = strbuf_detach(&nbuf, &size); |
6c510bee LT |
1826 | re_allocated = 1; |
1827 | } | |
1828 | } | |
c4ce46fc | 1829 | if (flags & HASH_FORMAT_CHECK) { |
c879daa2 NTND |
1830 | if (type == OBJ_TREE) |
1831 | check_tree(buf, size); | |
1832 | if (type == OBJ_COMMIT) | |
1833 | check_commit(buf, size); | |
1834 | if (type == OBJ_TAG) | |
1835 | check_tag(buf, size); | |
1836 | } | |
6c510bee | 1837 | |
7672db20 | 1838 | if (write_object) |
169c9c01 | 1839 | ret = write_object_file(buf, size, type_name(type), oid); |
abdc3fc8 | 1840 | else |
169c9c01 | 1841 | ret = hash_object_file(buf, size, type_name(type), oid); |
43df4f86 | 1842 | if (re_allocated) |
6c510bee | 1843 | free(buf); |
43df4f86 DP |
1844 | return ret; |
1845 | } | |
1846 | ||
58bf2a4c NTND |
1847 | static int index_stream_convert_blob(struct index_state *istate, |
1848 | struct object_id *oid, | |
1849 | int fd, | |
1850 | const char *path, | |
1851 | unsigned flags) | |
9035d75a SP |
1852 | { |
1853 | int ret; | |
1854 | const int write_object = flags & HASH_WRITE_OBJECT; | |
1855 | struct strbuf sbuf = STRBUF_INIT; | |
1856 | ||
1857 | assert(path); | |
58bf2a4c | 1858 | assert(would_convert_to_git_filter_fd(istate, path)); |
9035d75a | 1859 | |
58bf2a4c | 1860 | convert_to_git_filter_fd(istate, path, fd, &sbuf, |
8462ff43 | 1861 | get_conv_flags(flags)); |
9035d75a SP |
1862 | |
1863 | if (write_object) | |
169c9c01 | 1864 | ret = write_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB), |
a09c985e | 1865 | oid); |
9035d75a | 1866 | else |
169c9c01 | 1867 | ret = hash_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB), |
f070facc | 1868 | oid); |
9035d75a SP |
1869 | strbuf_release(&sbuf); |
1870 | return ret; | |
1871 | } | |
1872 | ||
58bf2a4c NTND |
1873 | static int index_pipe(struct index_state *istate, struct object_id *oid, |
1874 | int fd, enum object_type type, | |
7b41e1e1 JH |
1875 | const char *path, unsigned flags) |
1876 | { | |
1877 | struct strbuf sbuf = STRBUF_INIT; | |
1878 | int ret; | |
1879 | ||
1880 | if (strbuf_read(&sbuf, fd, 4096) >= 0) | |
58bf2a4c | 1881 | ret = index_mem(istate, oid, sbuf.buf, sbuf.len, type, path, flags); |
7b41e1e1 JH |
1882 | else |
1883 | ret = -1; | |
1884 | strbuf_release(&sbuf); | |
1885 | return ret; | |
1886 | } | |
1887 | ||
ea68b0ce DP |
1888 | #define SMALL_FILE_SIZE (32*1024) |
1889 | ||
58bf2a4c NTND |
1890 | static int index_core(struct index_state *istate, |
1891 | struct object_id *oid, int fd, size_t size, | |
7b41e1e1 JH |
1892 | enum object_type type, const char *path, |
1893 | unsigned flags) | |
43df4f86 DP |
1894 | { |
1895 | int ret; | |
43df4f86 | 1896 | |
7b41e1e1 | 1897 | if (!size) { |
58bf2a4c | 1898 | ret = index_mem(istate, oid, "", size, type, path, flags); |
ea68b0ce DP |
1899 | } else if (size <= SMALL_FILE_SIZE) { |
1900 | char *buf = xmalloc(size); | |
90dca671 JK |
1901 | ssize_t read_result = read_in_full(fd, buf, size); |
1902 | if (read_result < 0) | |
259328b7 | 1903 | ret = error_errno(_("read error while indexing %s"), |
90dca671 JK |
1904 | path ? path : "<unknown>"); |
1905 | else if (read_result != size) | |
259328b7 | 1906 | ret = error(_("short read while indexing %s"), |
90dca671 | 1907 | path ? path : "<unknown>"); |
ea68b0ce | 1908 | else |
58bf2a4c | 1909 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
ea68b0ce | 1910 | free(buf); |
08bda208 | 1911 | } else { |
43df4f86 | 1912 | void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0); |
58bf2a4c | 1913 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
aac17941 | 1914 | munmap(buf, size); |
08bda208 | 1915 | } |
7b41e1e1 JH |
1916 | return ret; |
1917 | } | |
1918 | ||
4dd1fbc7 | 1919 | /* |
568508e7 JH |
1920 | * This creates one packfile per large blob unless bulk-checkin |
1921 | * machinery is "plugged". | |
4dd1fbc7 JH |
1922 | * |
1923 | * This also bypasses the usual "convert-to-git" dance, and that is on | |
1924 | * purpose. We could write a streaming version of the converting | |
1925 | * functions and insert that before feeding the data to fast-import | |
4f22b101 JK |
1926 | * (or equivalent in-core API described above). However, that is |
1927 | * somewhat complicated, as we do not know the size of the filter | |
1928 | * result, which we need to know beforehand when writing a git object. | |
1929 | * Since the primary motivation for trying to stream from the working | |
1930 | * tree file and to avoid mmaping it in core is to deal with large | |
1931 | * binary blobs, they generally do not want to get any conversion, and | |
1932 | * callers should avoid this code path when filters are requested. | |
4dd1fbc7 | 1933 | */ |
7d5e1dc3 | 1934 | static int index_stream(struct object_id *oid, int fd, size_t size, |
4dd1fbc7 JH |
1935 | enum object_type type, const char *path, |
1936 | unsigned flags) | |
1937 | { | |
68ee6dfc | 1938 | return index_bulk_checkin(oid, fd, size, type, path, flags); |
4dd1fbc7 JH |
1939 | } |
1940 | ||
58bf2a4c NTND |
1941 | int index_fd(struct index_state *istate, struct object_id *oid, |
1942 | int fd, struct stat *st, | |
7b41e1e1 JH |
1943 | enum object_type type, const char *path, unsigned flags) |
1944 | { | |
1945 | int ret; | |
7b41e1e1 | 1946 | |
9079ab7c SP |
1947 | /* |
1948 | * Call xsize_t() only when needed to avoid potentially unnecessary | |
1949 | * die() for large files. | |
1950 | */ | |
58bf2a4c NTND |
1951 | if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(istate, path)) |
1952 | ret = index_stream_convert_blob(istate, oid, fd, path, flags); | |
9035d75a | 1953 | else if (!S_ISREG(st->st_mode)) |
58bf2a4c | 1954 | ret = index_pipe(istate, oid, fd, type, path, flags); |
9079ab7c | 1955 | else if (st->st_size <= big_file_threshold || type != OBJ_BLOB || |
58bf2a4c NTND |
1956 | (path && would_convert_to_git(istate, path))) |
1957 | ret = index_core(istate, oid, fd, xsize_t(st->st_size), | |
1958 | type, path, flags); | |
4dd1fbc7 | 1959 | else |
7d5e1dc3 | 1960 | ret = index_stream(oid, fd, xsize_t(st->st_size), type, path, |
9079ab7c | 1961 | flags); |
43df4f86 | 1962 | close(fd); |
aac17941 | 1963 | return ret; |
74400e71 | 1964 | } |
ec1fcc16 | 1965 | |
58bf2a4c NTND |
1966 | int index_path(struct index_state *istate, struct object_id *oid, |
1967 | const char *path, struct stat *st, unsigned flags) | |
ec1fcc16 JH |
1968 | { |
1969 | int fd; | |
b760d3aa | 1970 | struct strbuf sb = STRBUF_INIT; |
ea8e0297 | 1971 | int rc = 0; |
ec1fcc16 JH |
1972 | |
1973 | switch (st->st_mode & S_IFMT) { | |
1974 | case S_IFREG: | |
1975 | fd = open(path, O_RDONLY); | |
1976 | if (fd < 0) | |
7616c6ca | 1977 | return error_errno("open(\"%s\")", path); |
58bf2a4c | 1978 | if (index_fd(istate, oid, fd, st, OBJ_BLOB, path, flags) < 0) |
259328b7 | 1979 | return error(_("%s: failed to insert into database"), |
ec1fcc16 JH |
1980 | path); |
1981 | break; | |
1982 | case S_IFLNK: | |
7616c6ca NTND |
1983 | if (strbuf_readlink(&sb, path, st->st_size)) |
1984 | return error_errno("readlink(\"%s\")", path); | |
c4ce46fc | 1985 | if (!(flags & HASH_WRITE_OBJECT)) |
f070facc | 1986 | hash_object_file(sb.buf, sb.len, blob_type, oid); |
a09c985e | 1987 | else if (write_object_file(sb.buf, sb.len, blob_type, oid)) |
259328b7 | 1988 | rc = error(_("%s: failed to insert into database"), path); |
b760d3aa | 1989 | strbuf_release(&sb); |
ec1fcc16 | 1990 | break; |
f35a6d3b | 1991 | case S_IFDIR: |
a98e6101 | 1992 | return resolve_gitlink_ref(path, "HEAD", oid); |
ec1fcc16 | 1993 | default: |
259328b7 | 1994 | return error(_("%s: unsupported file type"), path); |
ec1fcc16 | 1995 | } |
ea8e0297 | 1996 | return rc; |
ec1fcc16 | 1997 | } |
a69e5429 JH |
1998 | |
1999 | int read_pack_header(int fd, struct pack_header *header) | |
2000 | { | |
f48ecd38 | 2001 | if (read_in_full(fd, header, sizeof(*header)) != sizeof(*header)) |
c697ad14 HO |
2002 | /* "eof before pack header was fully read" */ |
2003 | return PH_ERROR_EOF; | |
2004 | ||
a69e5429 JH |
2005 | if (header->hdr_signature != htonl(PACK_SIGNATURE)) |
2006 | /* "protocol error (pack signature mismatch detected)" */ | |
2007 | return PH_ERROR_PACK_SIGNATURE; | |
2008 | if (!pack_version_ok(header->hdr_version)) | |
2009 | /* "protocol error (pack version unsupported)" */ | |
2010 | return PH_ERROR_PROTOCOL; | |
2011 | return 0; | |
2012 | } | |
40d52ff7 | 2013 | |
e816caa0 | 2014 | void assert_oid_type(const struct object_id *oid, enum object_type expect) |
40d52ff7 | 2015 | { |
0df8e965 | 2016 | enum object_type type = oid_object_info(the_repository, oid, NULL); |
40d52ff7 | 2017 | if (type < 0) |
259328b7 | 2018 | die(_("%s is not a valid object"), oid_to_hex(oid)); |
40d52ff7 | 2019 | if (type != expect) |
259328b7 | 2020 | die(_("%s is not a valid '%s' object"), oid_to_hex(oid), |
debca9d2 | 2021 | type_name(expect)); |
40d52ff7 | 2022 | } |
27e1e22d | 2023 | |
70c49050 | 2024 | int for_each_file_in_obj_subdir(unsigned int subdir_nr, |
cc817ca3 RS |
2025 | struct strbuf *path, |
2026 | each_loose_object_fn obj_cb, | |
2027 | each_loose_cruft_fn cruft_cb, | |
2028 | each_loose_subdir_fn subdir_cb, | |
2029 | void *data) | |
27e1e22d | 2030 | { |
0375f472 RS |
2031 | size_t origlen, baselen; |
2032 | DIR *dir; | |
27e1e22d JK |
2033 | struct dirent *de; |
2034 | int r = 0; | |
62a24c89 | 2035 | struct object_id oid; |
27e1e22d | 2036 | |
70c49050 RS |
2037 | if (subdir_nr > 0xff) |
2038 | BUG("invalid loose object subdirectory: %x", subdir_nr); | |
2039 | ||
0375f472 RS |
2040 | origlen = path->len; |
2041 | strbuf_complete(path, '/'); | |
2042 | strbuf_addf(path, "%02x", subdir_nr); | |
0375f472 RS |
2043 | |
2044 | dir = opendir(path->buf); | |
27e1e22d | 2045 | if (!dir) { |
0375f472 | 2046 | if (errno != ENOENT) |
259328b7 | 2047 | r = error_errno(_("unable to open %s"), path->buf); |
0375f472 RS |
2048 | strbuf_setlen(path, origlen); |
2049 | return r; | |
27e1e22d JK |
2050 | } |
2051 | ||
62a24c89 | 2052 | oid.hash[0] = subdir_nr; |
163ee5e6 DS |
2053 | strbuf_addch(path, '/'); |
2054 | baselen = path->len; | |
62a24c89 | 2055 | |
27e1e22d | 2056 | while ((de = readdir(dir))) { |
163ee5e6 | 2057 | size_t namelen; |
27e1e22d JK |
2058 | if (is_dot_or_dotdot(de->d_name)) |
2059 | continue; | |
2060 | ||
163ee5e6 | 2061 | namelen = strlen(de->d_name); |
27e1e22d | 2062 | strbuf_setlen(path, baselen); |
163ee5e6 | 2063 | strbuf_add(path, de->d_name, namelen); |
94b5e093 | 2064 | if (namelen == the_hash_algo->hexsz - 2 && |
62a24c89 | 2065 | !hex_to_bytes(oid.hash + 1, de->d_name, |
94b5e093 | 2066 | the_hash_algo->rawsz - 1)) { |
62a24c89 RS |
2067 | if (obj_cb) { |
2068 | r = obj_cb(&oid, path->buf, data); | |
2069 | if (r) | |
2070 | break; | |
27e1e22d | 2071 | } |
62a24c89 | 2072 | continue; |
27e1e22d JK |
2073 | } |
2074 | ||
2075 | if (cruft_cb) { | |
2076 | r = cruft_cb(de->d_name, path->buf, data); | |
2077 | if (r) | |
2078 | break; | |
2079 | } | |
2080 | } | |
094c7e63 | 2081 | closedir(dir); |
27e1e22d | 2082 | |
163ee5e6 | 2083 | strbuf_setlen(path, baselen - 1); |
27e1e22d JK |
2084 | if (!r && subdir_cb) |
2085 | r = subdir_cb(subdir_nr, path->buf, data); | |
2086 | ||
0375f472 RS |
2087 | strbuf_setlen(path, origlen); |
2088 | ||
27e1e22d JK |
2089 | return r; |
2090 | } | |
2091 | ||
e6f875e0 | 2092 | int for_each_loose_file_in_objdir_buf(struct strbuf *path, |
27e1e22d JK |
2093 | each_loose_object_fn obj_cb, |
2094 | each_loose_cruft_fn cruft_cb, | |
2095 | each_loose_subdir_fn subdir_cb, | |
2096 | void *data) | |
2097 | { | |
27e1e22d JK |
2098 | int r = 0; |
2099 | int i; | |
2100 | ||
27e1e22d | 2101 | for (i = 0; i < 256; i++) { |
e6f875e0 | 2102 | r = for_each_file_in_obj_subdir(i, path, obj_cb, cruft_cb, |
27e1e22d | 2103 | subdir_cb, data); |
27e1e22d JK |
2104 | if (r) |
2105 | break; | |
2106 | } | |
2107 | ||
e6f875e0 JK |
2108 | return r; |
2109 | } | |
2110 | ||
2111 | int for_each_loose_file_in_objdir(const char *path, | |
2112 | each_loose_object_fn obj_cb, | |
2113 | each_loose_cruft_fn cruft_cb, | |
2114 | each_loose_subdir_fn subdir_cb, | |
2115 | void *data) | |
2116 | { | |
2117 | struct strbuf buf = STRBUF_INIT; | |
2118 | int r; | |
2119 | ||
2120 | strbuf_addstr(&buf, path); | |
2121 | r = for_each_loose_file_in_objdir_buf(&buf, obj_cb, cruft_cb, | |
2122 | subdir_cb, data); | |
27e1e22d | 2123 | strbuf_release(&buf); |
e6f875e0 | 2124 | |
27e1e22d JK |
2125 | return r; |
2126 | } | |
660c889e | 2127 | |
a7ff6f5a JK |
2128 | int for_each_loose_object(each_loose_object_fn cb, void *data, |
2129 | enum for_each_object_flags flags) | |
660c889e | 2130 | { |
f0eaf638 | 2131 | struct object_directory *odb; |
b0a42642 | 2132 | |
f0eaf638 JK |
2133 | prepare_alt_odb(the_repository); |
2134 | for (odb = the_repository->objects->odb; odb; odb = odb->next) { | |
2135 | int r = for_each_loose_file_in_objdir(odb->path, cb, NULL, | |
2136 | NULL, data); | |
2137 | if (r) | |
2138 | return r; | |
660c889e | 2139 | |
f0eaf638 JK |
2140 | if (flags & FOR_EACH_OBJECT_LOCAL_ONLY) |
2141 | break; | |
2142 | } | |
1385bb7b | 2143 | |
f0eaf638 | 2144 | return 0; |
660c889e JK |
2145 | } |
2146 | ||
3a2e0824 JK |
2147 | static int append_loose_object(const struct object_id *oid, const char *path, |
2148 | void *data) | |
660c889e | 2149 | { |
3a2e0824 JK |
2150 | oid_array_append(data, oid); |
2151 | return 0; | |
2152 | } | |
660c889e | 2153 | |
0000d654 RS |
2154 | struct oid_array *odb_loose_cache(struct object_directory *odb, |
2155 | const struct object_id *oid) | |
2156 | { | |
2157 | int subdir_nr = oid->hash[0]; | |
3a2e0824 | 2158 | struct strbuf buf = STRBUF_INIT; |
660c889e | 2159 | |
3a2e0824 JK |
2160 | if (subdir_nr < 0 || |
2161 | subdir_nr >= ARRAY_SIZE(odb->loose_objects_subdir_seen)) | |
2162 | BUG("subdir_nr out of range"); | |
1385bb7b | 2163 | |
3a2e0824 | 2164 | if (odb->loose_objects_subdir_seen[subdir_nr]) |
8be88dbc | 2165 | return &odb->loose_objects_cache[subdir_nr]; |
3a2e0824 JK |
2166 | |
2167 | strbuf_addstr(&buf, odb->path); | |
2168 | for_each_file_in_obj_subdir(subdir_nr, &buf, | |
2169 | append_loose_object, | |
2170 | NULL, NULL, | |
4cea1ce0 | 2171 | &odb->loose_objects_cache[subdir_nr]); |
3a2e0824 | 2172 | odb->loose_objects_subdir_seen[subdir_nr] = 1; |
7317aa71 | 2173 | strbuf_release(&buf); |
8be88dbc | 2174 | return &odb->loose_objects_cache[subdir_nr]; |
660c889e JK |
2175 | } |
2176 | ||
d4e19e51 RS |
2177 | void odb_clear_loose_cache(struct object_directory *odb) |
2178 | { | |
4cea1ce0 RS |
2179 | int i; |
2180 | ||
2181 | for (i = 0; i < ARRAY_SIZE(odb->loose_objects_cache); i++) | |
2182 | oid_array_clear(&odb->loose_objects_cache[i]); | |
d4e19e51 RS |
2183 | memset(&odb->loose_objects_subdir_seen, 0, |
2184 | sizeof(odb->loose_objects_subdir_seen)); | |
2185 | } | |
2186 | ||
f6371f92 JK |
2187 | static int check_stream_sha1(git_zstream *stream, |
2188 | const char *hdr, | |
2189 | unsigned long size, | |
2190 | const char *path, | |
2191 | const unsigned char *expected_sha1) | |
2192 | { | |
18e2588e | 2193 | git_hash_ctx c; |
cd02599c | 2194 | unsigned char real_sha1[GIT_MAX_RAWSZ]; |
f6371f92 JK |
2195 | unsigned char buf[4096]; |
2196 | unsigned long total_read; | |
2197 | int status = Z_OK; | |
2198 | ||
18e2588e | 2199 | the_hash_algo->init_fn(&c); |
2200 | the_hash_algo->update_fn(&c, hdr, stream->total_out); | |
f6371f92 JK |
2201 | |
2202 | /* | |
2203 | * We already read some bytes into hdr, but the ones up to the NUL | |
2204 | * do not count against the object's content size. | |
2205 | */ | |
2206 | total_read = stream->total_out - strlen(hdr) - 1; | |
2207 | ||
2208 | /* | |
2209 | * This size comparison must be "<=" to read the final zlib packets; | |
2210 | * see the comment in unpack_sha1_rest for details. | |
2211 | */ | |
2212 | while (total_read <= size && | |
18ad13e5 JH |
2213 | (status == Z_OK || |
2214 | (status == Z_BUF_ERROR && !stream->avail_out))) { | |
f6371f92 JK |
2215 | stream->next_out = buf; |
2216 | stream->avail_out = sizeof(buf); | |
2217 | if (size - total_read < stream->avail_out) | |
2218 | stream->avail_out = size - total_read; | |
2219 | status = git_inflate(stream, Z_FINISH); | |
18e2588e | 2220 | the_hash_algo->update_fn(&c, buf, stream->next_out - buf); |
f6371f92 JK |
2221 | total_read += stream->next_out - buf; |
2222 | } | |
2223 | git_inflate_end(stream); | |
2224 | ||
2225 | if (status != Z_STREAM_END) { | |
259328b7 | 2226 | error(_("corrupt loose object '%s'"), sha1_to_hex(expected_sha1)); |
f6371f92 JK |
2227 | return -1; |
2228 | } | |
cce044df | 2229 | if (stream->avail_in) { |
259328b7 | 2230 | error(_("garbage at end of loose object '%s'"), |
cce044df JK |
2231 | sha1_to_hex(expected_sha1)); |
2232 | return -1; | |
2233 | } | |
f6371f92 | 2234 | |
18e2588e | 2235 | the_hash_algo->final_fn(real_sha1, &c); |
67947c34 | 2236 | if (!hasheq(expected_sha1, real_sha1)) { |
259328b7 | 2237 | error(_("sha1 mismatch for %s (expected %s)"), path, |
f6371f92 JK |
2238 | sha1_to_hex(expected_sha1)); |
2239 | return -1; | |
2240 | } | |
2241 | ||
2242 | return 0; | |
2243 | } | |
2244 | ||
2245 | int read_loose_object(const char *path, | |
d61d87bd | 2246 | const struct object_id *expected_oid, |
f6371f92 JK |
2247 | enum object_type *type, |
2248 | unsigned long *size, | |
2249 | void **contents) | |
2250 | { | |
2251 | int ret = -1; | |
f6371f92 JK |
2252 | void *map = NULL; |
2253 | unsigned long mapsize; | |
2254 | git_zstream stream; | |
1af64f73 | 2255 | char hdr[MAX_HEADER_LEN]; |
f6371f92 JK |
2256 | |
2257 | *contents = NULL; | |
2258 | ||
332295d7 | 2259 | map = map_sha1_file_1(the_repository, path, NULL, &mapsize); |
f6371f92 | 2260 | if (!map) { |
259328b7 | 2261 | error_errno(_("unable to mmap %s"), path); |
f6371f92 JK |
2262 | goto out; |
2263 | } | |
2264 | ||
2265 | if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) { | |
259328b7 | 2266 | error(_("unable to unpack header of %s"), path); |
f6371f92 JK |
2267 | goto out; |
2268 | } | |
2269 | ||
2270 | *type = parse_sha1_header(hdr, size); | |
2271 | if (*type < 0) { | |
259328b7 | 2272 | error(_("unable to parse header of %s"), path); |
f6371f92 JK |
2273 | git_inflate_end(&stream); |
2274 | goto out; | |
2275 | } | |
2276 | ||
7ac4f3a0 | 2277 | if (*type == OBJ_BLOB && *size > big_file_threshold) { |
d61d87bd | 2278 | if (check_stream_sha1(&stream, hdr, *size, path, expected_oid->hash) < 0) |
f6371f92 JK |
2279 | goto out; |
2280 | } else { | |
d61d87bd | 2281 | *contents = unpack_sha1_rest(&stream, hdr, *size, expected_oid->hash); |
f6371f92 | 2282 | if (!*contents) { |
259328b7 | 2283 | error(_("unable to unpack contents of %s"), path); |
f6371f92 JK |
2284 | git_inflate_end(&stream); |
2285 | goto out; | |
2286 | } | |
17e65451 | 2287 | if (check_object_signature(expected_oid, *contents, |
debca9d2 | 2288 | *size, type_name(*type))) { |
259328b7 | 2289 | error(_("sha1 mismatch for %s (expected %s)"), path, |
d61d87bd | 2290 | oid_to_hex(expected_oid)); |
f6371f92 JK |
2291 | free(*contents); |
2292 | goto out; | |
2293 | } | |
2294 | } | |
2295 | ||
2296 | ret = 0; /* everything checks out */ | |
2297 | ||
2298 | out: | |
2299 | if (map) | |
2300 | munmap(map, mapsize); | |
f6371f92 JK |
2301 | return ret; |
2302 | } |