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1 | #ifndef CACHE_H | |
2 | #define CACHE_H | |
3 | ||
4 | #include "git-compat-util.h" | |
5 | #include "strbuf.h" | |
6 | #include "hashmap.h" | |
7 | #include "advice.h" | |
8 | #include "gettext.h" | |
9 | #include "convert.h" | |
10 | #include "trace.h" | |
11 | #include "string-list.h" | |
12 | #include "pack-revindex.h" | |
13 | ||
14 | #include SHA1_HEADER | |
15 | #ifndef platform_SHA_CTX | |
16 | /* | |
17 | * platform's underlying implementation of SHA-1; could be OpenSSL, | |
18 | * blk_SHA, Apple CommonCrypto, etc... Note that including | |
19 | * SHA1_HEADER may have already defined platform_SHA_CTX for our | |
20 | * own implementations like block-sha1 and ppc-sha1, so we list | |
21 | * the default for OpenSSL compatible SHA-1 implementations here. | |
22 | */ | |
23 | #define platform_SHA_CTX SHA_CTX | |
24 | #define platform_SHA1_Init SHA1_Init | |
25 | #define platform_SHA1_Update SHA1_Update | |
26 | #define platform_SHA1_Final SHA1_Final | |
27 | #endif | |
28 | ||
29 | #define git_SHA_CTX platform_SHA_CTX | |
30 | #define git_SHA1_Init platform_SHA1_Init | |
31 | #define git_SHA1_Update platform_SHA1_Update | |
32 | #define git_SHA1_Final platform_SHA1_Final | |
33 | ||
34 | #ifdef SHA1_MAX_BLOCK_SIZE | |
35 | #include "compat/sha1-chunked.h" | |
36 | #undef git_SHA1_Update | |
37 | #define git_SHA1_Update git_SHA1_Update_Chunked | |
38 | #endif | |
39 | ||
40 | #include <zlib.h> | |
41 | typedef struct git_zstream { | |
42 | z_stream z; | |
43 | unsigned long avail_in; | |
44 | unsigned long avail_out; | |
45 | unsigned long total_in; | |
46 | unsigned long total_out; | |
47 | unsigned char *next_in; | |
48 | unsigned char *next_out; | |
49 | } git_zstream; | |
50 | ||
51 | void git_inflate_init(git_zstream *); | |
52 | void git_inflate_init_gzip_only(git_zstream *); | |
53 | void git_inflate_end(git_zstream *); | |
54 | int git_inflate(git_zstream *, int flush); | |
55 | ||
56 | void git_deflate_init(git_zstream *, int level); | |
57 | void git_deflate_init_gzip(git_zstream *, int level); | |
58 | void git_deflate_init_raw(git_zstream *, int level); | |
59 | void git_deflate_end(git_zstream *); | |
60 | int git_deflate_abort(git_zstream *); | |
61 | int git_deflate_end_gently(git_zstream *); | |
62 | int git_deflate(git_zstream *, int flush); | |
63 | unsigned long git_deflate_bound(git_zstream *, unsigned long); | |
64 | ||
65 | /* The length in bytes and in hex digits of an object name (SHA-1 value). */ | |
66 | #define GIT_SHA1_RAWSZ 20 | |
67 | #define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) | |
68 | ||
69 | struct object_id { | |
70 | unsigned char hash[GIT_SHA1_RAWSZ]; | |
71 | }; | |
72 | ||
73 | #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) | |
74 | #define DTYPE(de) ((de)->d_type) | |
75 | #else | |
76 | #undef DT_UNKNOWN | |
77 | #undef DT_DIR | |
78 | #undef DT_REG | |
79 | #undef DT_LNK | |
80 | #define DT_UNKNOWN 0 | |
81 | #define DT_DIR 1 | |
82 | #define DT_REG 2 | |
83 | #define DT_LNK 3 | |
84 | #define DTYPE(de) DT_UNKNOWN | |
85 | #endif | |
86 | ||
87 | /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */ | |
88 | #define S_IFINVALID 0030000 | |
89 | ||
90 | /* | |
91 | * A "directory link" is a link to another git directory. | |
92 | * | |
93 | * The value 0160000 is not normally a valid mode, and | |
94 | * also just happens to be S_IFDIR + S_IFLNK | |
95 | */ | |
96 | #define S_IFGITLINK 0160000 | |
97 | #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) | |
98 | ||
99 | /* | |
100 | * Some mode bits are also used internally for computations. | |
101 | * | |
102 | * They *must* not overlap with any valid modes, and they *must* not be emitted | |
103 | * to outside world - i.e. appear on disk or network. In other words, it's just | |
104 | * temporary fields, which we internally use, but they have to stay in-house. | |
105 | * | |
106 | * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git | |
107 | * codebase mode is `unsigned int` which is assumed to be at least 32 bits ) | |
108 | */ | |
109 | ||
110 | /* used internally in tree-diff */ | |
111 | #define S_DIFFTREE_IFXMIN_NEQ 0x80000000 | |
112 | ||
113 | ||
114 | /* | |
115 | * Intensive research over the course of many years has shown that | |
116 | * port 9418 is totally unused by anything else. Or | |
117 | * | |
118 | * Your search - "port 9418" - did not match any documents. | |
119 | * | |
120 | * as www.google.com puts it. | |
121 | * | |
122 | * This port has been properly assigned for git use by IANA: | |
123 | * git (Assigned-9418) [I06-050728-0001]. | |
124 | * | |
125 | * git 9418/tcp git pack transfer service | |
126 | * git 9418/udp git pack transfer service | |
127 | * | |
128 | * with Linus Torvalds <torvalds@osdl.org> as the point of | |
129 | * contact. September 2005. | |
130 | * | |
131 | * See http://www.iana.org/assignments/port-numbers | |
132 | */ | |
133 | #define DEFAULT_GIT_PORT 9418 | |
134 | ||
135 | /* | |
136 | * Basic data structures for the directory cache | |
137 | */ | |
138 | ||
139 | #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */ | |
140 | struct cache_header { | |
141 | uint32_t hdr_signature; | |
142 | uint32_t hdr_version; | |
143 | uint32_t hdr_entries; | |
144 | }; | |
145 | ||
146 | #define INDEX_FORMAT_LB 2 | |
147 | #define INDEX_FORMAT_UB 4 | |
148 | ||
149 | /* | |
150 | * The "cache_time" is just the low 32 bits of the | |
151 | * time. It doesn't matter if it overflows - we only | |
152 | * check it for equality in the 32 bits we save. | |
153 | */ | |
154 | struct cache_time { | |
155 | uint32_t sec; | |
156 | uint32_t nsec; | |
157 | }; | |
158 | ||
159 | struct stat_data { | |
160 | struct cache_time sd_ctime; | |
161 | struct cache_time sd_mtime; | |
162 | unsigned int sd_dev; | |
163 | unsigned int sd_ino; | |
164 | unsigned int sd_uid; | |
165 | unsigned int sd_gid; | |
166 | unsigned int sd_size; | |
167 | }; | |
168 | ||
169 | struct cache_entry { | |
170 | struct hashmap_entry ent; | |
171 | struct stat_data ce_stat_data; | |
172 | unsigned int ce_mode; | |
173 | unsigned int ce_flags; | |
174 | unsigned int ce_namelen; | |
175 | unsigned int index; /* for link extension */ | |
176 | unsigned char sha1[20]; | |
177 | char name[FLEX_ARRAY]; /* more */ | |
178 | }; | |
179 | ||
180 | #define CE_STAGEMASK (0x3000) | |
181 | #define CE_EXTENDED (0x4000) | |
182 | #define CE_VALID (0x8000) | |
183 | #define CE_STAGESHIFT 12 | |
184 | ||
185 | /* | |
186 | * Range 0xFFFF0FFF in ce_flags is divided into | |
187 | * two parts: in-memory flags and on-disk ones. | |
188 | * Flags in CE_EXTENDED_FLAGS will get saved on-disk | |
189 | * if you want to save a new flag, add it in | |
190 | * CE_EXTENDED_FLAGS | |
191 | * | |
192 | * In-memory only flags | |
193 | */ | |
194 | #define CE_UPDATE (1 << 16) | |
195 | #define CE_REMOVE (1 << 17) | |
196 | #define CE_UPTODATE (1 << 18) | |
197 | #define CE_ADDED (1 << 19) | |
198 | ||
199 | #define CE_HASHED (1 << 20) | |
200 | #define CE_WT_REMOVE (1 << 22) /* remove in work directory */ | |
201 | #define CE_CONFLICTED (1 << 23) | |
202 | ||
203 | #define CE_UNPACKED (1 << 24) | |
204 | #define CE_NEW_SKIP_WORKTREE (1 << 25) | |
205 | ||
206 | /* used to temporarily mark paths matched by pathspecs */ | |
207 | #define CE_MATCHED (1 << 26) | |
208 | ||
209 | #define CE_UPDATE_IN_BASE (1 << 27) | |
210 | #define CE_STRIP_NAME (1 << 28) | |
211 | ||
212 | /* | |
213 | * Extended on-disk flags | |
214 | */ | |
215 | #define CE_INTENT_TO_ADD (1 << 29) | |
216 | #define CE_SKIP_WORKTREE (1 << 30) | |
217 | /* CE_EXTENDED2 is for future extension */ | |
218 | #define CE_EXTENDED2 (1U << 31) | |
219 | ||
220 | #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) | |
221 | ||
222 | /* | |
223 | * Safeguard to avoid saving wrong flags: | |
224 | * - CE_EXTENDED2 won't get saved until its semantic is known | |
225 | * - Bits in 0x0000FFFF have been saved in ce_flags already | |
226 | * - Bits in 0x003F0000 are currently in-memory flags | |
227 | */ | |
228 | #if CE_EXTENDED_FLAGS & 0x803FFFFF | |
229 | #error "CE_EXTENDED_FLAGS out of range" | |
230 | #endif | |
231 | ||
232 | /* Forward structure decls */ | |
233 | struct pathspec; | |
234 | struct child_process; | |
235 | ||
236 | /* | |
237 | * Copy the sha1 and stat state of a cache entry from one to | |
238 | * another. But we never change the name, or the hash state! | |
239 | */ | |
240 | static inline void copy_cache_entry(struct cache_entry *dst, | |
241 | const struct cache_entry *src) | |
242 | { | |
243 | unsigned int state = dst->ce_flags & CE_HASHED; | |
244 | ||
245 | /* Don't copy hash chain and name */ | |
246 | memcpy(&dst->ce_stat_data, &src->ce_stat_data, | |
247 | offsetof(struct cache_entry, name) - | |
248 | offsetof(struct cache_entry, ce_stat_data)); | |
249 | ||
250 | /* Restore the hash state */ | |
251 | dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; | |
252 | } | |
253 | ||
254 | static inline unsigned create_ce_flags(unsigned stage) | |
255 | { | |
256 | return (stage << CE_STAGESHIFT); | |
257 | } | |
258 | ||
259 | #define ce_namelen(ce) ((ce)->ce_namelen) | |
260 | #define ce_size(ce) cache_entry_size(ce_namelen(ce)) | |
261 | #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) | |
262 | #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE) | |
263 | #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE) | |
264 | #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE) | |
265 | #define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD) | |
266 | ||
267 | #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) | |
268 | static inline unsigned int create_ce_mode(unsigned int mode) | |
269 | { | |
270 | if (S_ISLNK(mode)) | |
271 | return S_IFLNK; | |
272 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) | |
273 | return S_IFGITLINK; | |
274 | return S_IFREG | ce_permissions(mode); | |
275 | } | |
276 | static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce, | |
277 | unsigned int mode) | |
278 | { | |
279 | extern int trust_executable_bit, has_symlinks; | |
280 | if (!has_symlinks && S_ISREG(mode) && | |
281 | ce && S_ISLNK(ce->ce_mode)) | |
282 | return ce->ce_mode; | |
283 | if (!trust_executable_bit && S_ISREG(mode)) { | |
284 | if (ce && S_ISREG(ce->ce_mode)) | |
285 | return ce->ce_mode; | |
286 | return create_ce_mode(0666); | |
287 | } | |
288 | return create_ce_mode(mode); | |
289 | } | |
290 | static inline int ce_to_dtype(const struct cache_entry *ce) | |
291 | { | |
292 | unsigned ce_mode = ntohl(ce->ce_mode); | |
293 | if (S_ISREG(ce_mode)) | |
294 | return DT_REG; | |
295 | else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode)) | |
296 | return DT_DIR; | |
297 | else if (S_ISLNK(ce_mode)) | |
298 | return DT_LNK; | |
299 | else | |
300 | return DT_UNKNOWN; | |
301 | } | |
302 | static inline unsigned int canon_mode(unsigned int mode) | |
303 | { | |
304 | if (S_ISREG(mode)) | |
305 | return S_IFREG | ce_permissions(mode); | |
306 | if (S_ISLNK(mode)) | |
307 | return S_IFLNK; | |
308 | if (S_ISDIR(mode)) | |
309 | return S_IFDIR; | |
310 | return S_IFGITLINK; | |
311 | } | |
312 | ||
313 | #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) | |
314 | ||
315 | #define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */ | |
316 | #define CE_ENTRY_CHANGED (1 << 1) | |
317 | #define CE_ENTRY_REMOVED (1 << 2) | |
318 | #define CE_ENTRY_ADDED (1 << 3) | |
319 | #define RESOLVE_UNDO_CHANGED (1 << 4) | |
320 | #define CACHE_TREE_CHANGED (1 << 5) | |
321 | #define SPLIT_INDEX_ORDERED (1 << 6) | |
322 | #define UNTRACKED_CHANGED (1 << 7) | |
323 | ||
324 | struct split_index; | |
325 | struct untracked_cache; | |
326 | ||
327 | struct index_state { | |
328 | struct cache_entry **cache; | |
329 | unsigned int version; | |
330 | unsigned int cache_nr, cache_alloc, cache_changed; | |
331 | struct string_list *resolve_undo; | |
332 | struct cache_tree *cache_tree; | |
333 | struct split_index *split_index; | |
334 | struct cache_time timestamp; | |
335 | unsigned name_hash_initialized : 1, | |
336 | initialized : 1; | |
337 | struct hashmap name_hash; | |
338 | struct hashmap dir_hash; | |
339 | unsigned char sha1[20]; | |
340 | struct untracked_cache *untracked; | |
341 | }; | |
342 | ||
343 | extern struct index_state the_index; | |
344 | ||
345 | /* Name hashing */ | |
346 | extern void add_name_hash(struct index_state *istate, struct cache_entry *ce); | |
347 | extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce); | |
348 | extern void free_name_hash(struct index_state *istate); | |
349 | ||
350 | ||
351 | #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS | |
352 | #define active_cache (the_index.cache) | |
353 | #define active_nr (the_index.cache_nr) | |
354 | #define active_alloc (the_index.cache_alloc) | |
355 | #define active_cache_changed (the_index.cache_changed) | |
356 | #define active_cache_tree (the_index.cache_tree) | |
357 | ||
358 | #define read_cache() read_index(&the_index) | |
359 | #define read_cache_from(path) read_index_from(&the_index, (path)) | |
360 | #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) | |
361 | #define is_cache_unborn() is_index_unborn(&the_index) | |
362 | #define read_cache_unmerged() read_index_unmerged(&the_index) | |
363 | #define discard_cache() discard_index(&the_index) | |
364 | #define unmerged_cache() unmerged_index(&the_index) | |
365 | #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) | |
366 | #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) | |
367 | #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) | |
368 | #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) | |
369 | #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) | |
370 | #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags)) | |
371 | #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) | |
372 | #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) | |
373 | #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) | |
374 | #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) | |
375 | #define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) | |
376 | #define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) | |
377 | #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) | |
378 | #define resolve_undo_clear() resolve_undo_clear_index(&the_index) | |
379 | #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) | |
380 | #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) | |
381 | #define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) | |
382 | #endif | |
383 | ||
384 | enum object_type { | |
385 | OBJ_BAD = -1, | |
386 | OBJ_NONE = 0, | |
387 | OBJ_COMMIT = 1, | |
388 | OBJ_TREE = 2, | |
389 | OBJ_BLOB = 3, | |
390 | OBJ_TAG = 4, | |
391 | /* 5 for future expansion */ | |
392 | OBJ_OFS_DELTA = 6, | |
393 | OBJ_REF_DELTA = 7, | |
394 | OBJ_ANY, | |
395 | OBJ_MAX | |
396 | }; | |
397 | ||
398 | static inline enum object_type object_type(unsigned int mode) | |
399 | { | |
400 | return S_ISDIR(mode) ? OBJ_TREE : | |
401 | S_ISGITLINK(mode) ? OBJ_COMMIT : | |
402 | OBJ_BLOB; | |
403 | } | |
404 | ||
405 | /* Double-check local_repo_env below if you add to this list. */ | |
406 | #define GIT_DIR_ENVIRONMENT "GIT_DIR" | |
407 | #define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR" | |
408 | #define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE" | |
409 | #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE" | |
410 | #define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX" | |
411 | #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" | |
412 | #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" | |
413 | #define INDEX_ENVIRONMENT "GIT_INDEX_FILE" | |
414 | #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE" | |
415 | #define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE" | |
416 | #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR" | |
417 | #define CONFIG_ENVIRONMENT "GIT_CONFIG" | |
418 | #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS" | |
419 | #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH" | |
420 | #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES" | |
421 | #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS" | |
422 | #define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE" | |
423 | #define GITATTRIBUTES_FILE ".gitattributes" | |
424 | #define INFOATTRIBUTES_FILE "info/attributes" | |
425 | #define ATTRIBUTE_MACRO_PREFIX "[attr]" | |
426 | #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF" | |
427 | #define GIT_NOTES_DEFAULT_REF "refs/notes/commits" | |
428 | #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF" | |
429 | #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF" | |
430 | #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE" | |
431 | #define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS" | |
432 | #define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS" | |
433 | #define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS" | |
434 | #define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS" | |
435 | ||
436 | /* | |
437 | * This environment variable is expected to contain a boolean indicating | |
438 | * whether we should or should not treat: | |
439 | * | |
440 | * GIT_DIR=foo.git git ... | |
441 | * | |
442 | * as if GIT_WORK_TREE=. was given. It's not expected that users will make use | |
443 | * of this, but we use it internally to communicate to sub-processes that we | |
444 | * are in a bare repo. If not set, defaults to true. | |
445 | */ | |
446 | #define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE" | |
447 | ||
448 | /* | |
449 | * Repository-local GIT_* environment variables; these will be cleared | |
450 | * when git spawns a sub-process that runs inside another repository. | |
451 | * The array is NULL-terminated, which makes it easy to pass in the "env" | |
452 | * parameter of a run-command invocation, or to do a simple walk. | |
453 | */ | |
454 | extern const char * const local_repo_env[]; | |
455 | ||
456 | extern int is_bare_repository_cfg; | |
457 | extern int is_bare_repository(void); | |
458 | extern int is_inside_git_dir(void); | |
459 | extern char *git_work_tree_cfg; | |
460 | extern int is_inside_work_tree(void); | |
461 | extern const char *get_git_dir(void); | |
462 | extern const char *get_git_common_dir(void); | |
463 | extern char *get_object_directory(void); | |
464 | extern char *get_index_file(void); | |
465 | extern char *get_graft_file(void); | |
466 | extern int set_git_dir(const char *path); | |
467 | extern int get_common_dir_noenv(struct strbuf *sb, const char *gitdir); | |
468 | extern int get_common_dir(struct strbuf *sb, const char *gitdir); | |
469 | extern const char *get_git_namespace(void); | |
470 | extern const char *strip_namespace(const char *namespaced_ref); | |
471 | extern const char *get_git_work_tree(void); | |
472 | ||
473 | /* | |
474 | * Return true if the given path is a git directory; note that this _just_ | |
475 | * looks at the directory itself. If you want to know whether "foo/.git" | |
476 | * is a repository, you must feed that path, not just "foo". | |
477 | */ | |
478 | extern int is_git_directory(const char *path); | |
479 | ||
480 | /* | |
481 | * Return 1 if the given path is the root of a git repository or | |
482 | * submodule, else 0. Will not return 1 for bare repositories with the | |
483 | * exception of creating a bare repository in "foo/.git" and calling | |
484 | * is_git_repository("foo"). | |
485 | * | |
486 | * If we run into read errors, we err on the side of saying "yes, it is", | |
487 | * as we usually consider sub-repos precious, and would prefer to err on the | |
488 | * side of not disrupting or deleting them. | |
489 | */ | |
490 | extern int is_nonbare_repository_dir(struct strbuf *path); | |
491 | ||
492 | #define READ_GITFILE_ERR_STAT_FAILED 1 | |
493 | #define READ_GITFILE_ERR_NOT_A_FILE 2 | |
494 | #define READ_GITFILE_ERR_OPEN_FAILED 3 | |
495 | #define READ_GITFILE_ERR_READ_FAILED 4 | |
496 | #define READ_GITFILE_ERR_INVALID_FORMAT 5 | |
497 | #define READ_GITFILE_ERR_NO_PATH 6 | |
498 | #define READ_GITFILE_ERR_NOT_A_REPO 7 | |
499 | #define READ_GITFILE_ERR_TOO_LARGE 8 | |
500 | extern const char *read_gitfile_gently(const char *path, int *return_error_code); | |
501 | #define read_gitfile(path) read_gitfile_gently((path), NULL) | |
502 | extern const char *resolve_gitdir(const char *suspect); | |
503 | extern void set_git_work_tree(const char *tree); | |
504 | ||
505 | #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" | |
506 | ||
507 | extern const char **get_pathspec(const char *prefix, const char **pathspec); | |
508 | extern void setup_work_tree(void); | |
509 | extern const char *setup_git_directory_gently(int *); | |
510 | extern const char *setup_git_directory(void); | |
511 | extern char *prefix_path(const char *prefix, int len, const char *path); | |
512 | extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path); | |
513 | extern const char *prefix_filename(const char *prefix, int len, const char *path); | |
514 | extern int check_filename(const char *prefix, const char *name); | |
515 | extern void verify_filename(const char *prefix, | |
516 | const char *name, | |
517 | int diagnose_misspelt_rev); | |
518 | extern void verify_non_filename(const char *prefix, const char *name); | |
519 | extern int path_inside_repo(const char *prefix, const char *path); | |
520 | ||
521 | #define INIT_DB_QUIET 0x0001 | |
522 | ||
523 | extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int); | |
524 | extern int init_db(const char *template_dir, unsigned int flags); | |
525 | ||
526 | extern void sanitize_stdfds(void); | |
527 | extern int daemonize(void); | |
528 | ||
529 | #define alloc_nr(x) (((x)+16)*3/2) | |
530 | ||
531 | /* | |
532 | * Realloc the buffer pointed at by variable 'x' so that it can hold | |
533 | * at least 'nr' entries; the number of entries currently allocated | |
534 | * is 'alloc', using the standard growing factor alloc_nr() macro. | |
535 | * | |
536 | * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. | |
537 | */ | |
538 | #define ALLOC_GROW(x, nr, alloc) \ | |
539 | do { \ | |
540 | if ((nr) > alloc) { \ | |
541 | if (alloc_nr(alloc) < (nr)) \ | |
542 | alloc = (nr); \ | |
543 | else \ | |
544 | alloc = alloc_nr(alloc); \ | |
545 | REALLOC_ARRAY(x, alloc); \ | |
546 | } \ | |
547 | } while (0) | |
548 | ||
549 | /* Initialize and use the cache information */ | |
550 | struct lock_file; | |
551 | extern int read_index(struct index_state *); | |
552 | extern int read_index_preload(struct index_state *, const struct pathspec *pathspec); | |
553 | extern int do_read_index(struct index_state *istate, const char *path, | |
554 | int must_exist); /* for testting only! */ | |
555 | extern int read_index_from(struct index_state *, const char *path); | |
556 | extern int is_index_unborn(struct index_state *); | |
557 | extern int read_index_unmerged(struct index_state *); | |
558 | #define COMMIT_LOCK (1 << 0) | |
559 | #define CLOSE_LOCK (1 << 1) | |
560 | extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags); | |
561 | extern int discard_index(struct index_state *); | |
562 | extern int unmerged_index(const struct index_state *); | |
563 | extern int verify_path(const char *path); | |
564 | extern int index_dir_exists(struct index_state *istate, const char *name, int namelen); | |
565 | extern void adjust_dirname_case(struct index_state *istate, char *name); | |
566 | extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase); | |
567 | extern int index_name_pos(const struct index_state *, const char *name, int namelen); | |
568 | #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */ | |
569 | #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ | |
570 | #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ | |
571 | #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */ | |
572 | #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */ | |
573 | #define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */ | |
574 | extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option); | |
575 | extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name); | |
576 | extern int remove_index_entry_at(struct index_state *, int pos); | |
577 | extern void remove_marked_cache_entries(struct index_state *istate); | |
578 | extern int remove_file_from_index(struct index_state *, const char *path); | |
579 | #define ADD_CACHE_VERBOSE 1 | |
580 | #define ADD_CACHE_PRETEND 2 | |
581 | #define ADD_CACHE_IGNORE_ERRORS 4 | |
582 | #define ADD_CACHE_IGNORE_REMOVAL 8 | |
583 | #define ADD_CACHE_INTENT 16 | |
584 | extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags); | |
585 | extern int add_file_to_index(struct index_state *, const char *path, int flags); | |
586 | extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options); | |
587 | extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b); | |
588 | extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce); | |
589 | extern int index_name_is_other(const struct index_state *, const char *, int); | |
590 | extern void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *); | |
591 | ||
592 | /* do stat comparison even if CE_VALID is true */ | |
593 | #define CE_MATCH_IGNORE_VALID 01 | |
594 | /* do not check the contents but report dirty on racily-clean entries */ | |
595 | #define CE_MATCH_RACY_IS_DIRTY 02 | |
596 | /* do stat comparison even if CE_SKIP_WORKTREE is true */ | |
597 | #define CE_MATCH_IGNORE_SKIP_WORKTREE 04 | |
598 | /* ignore non-existent files during stat update */ | |
599 | #define CE_MATCH_IGNORE_MISSING 0x08 | |
600 | /* enable stat refresh */ | |
601 | #define CE_MATCH_REFRESH 0x10 | |
602 | extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); | |
603 | extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); | |
604 | ||
605 | #define HASH_WRITE_OBJECT 1 | |
606 | #define HASH_FORMAT_CHECK 2 | |
607 | extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags); | |
608 | extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags); | |
609 | ||
610 | /* | |
611 | * Record to sd the data from st that we use to check whether a file | |
612 | * might have changed. | |
613 | */ | |
614 | extern void fill_stat_data(struct stat_data *sd, struct stat *st); | |
615 | ||
616 | /* | |
617 | * Return 0 if st is consistent with a file not having been changed | |
618 | * since sd was filled. If there are differences, return a | |
619 | * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, | |
620 | * INODE_CHANGED, and DATA_CHANGED. | |
621 | */ | |
622 | extern int match_stat_data(const struct stat_data *sd, struct stat *st); | |
623 | extern int match_stat_data_racy(const struct index_state *istate, | |
624 | const struct stat_data *sd, struct stat *st); | |
625 | ||
626 | extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); | |
627 | ||
628 | #define REFRESH_REALLY 0x0001 /* ignore_valid */ | |
629 | #define REFRESH_UNMERGED 0x0002 /* allow unmerged */ | |
630 | #define REFRESH_QUIET 0x0004 /* be quiet about it */ | |
631 | #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */ | |
632 | #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */ | |
633 | #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */ | |
634 | extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg); | |
635 | ||
636 | extern void update_index_if_able(struct index_state *, struct lock_file *); | |
637 | ||
638 | extern int hold_locked_index(struct lock_file *, int); | |
639 | extern void set_alternate_index_output(const char *); | |
640 | ||
641 | /* Environment bits from configuration mechanism */ | |
642 | extern int trust_executable_bit; | |
643 | extern int trust_ctime; | |
644 | extern int check_stat; | |
645 | extern int quote_path_fully; | |
646 | extern int has_symlinks; | |
647 | extern int minimum_abbrev, default_abbrev; | |
648 | extern int ignore_case; | |
649 | extern int assume_unchanged; | |
650 | extern int prefer_symlink_refs; | |
651 | extern int log_all_ref_updates; | |
652 | extern int warn_ambiguous_refs; | |
653 | extern int warn_on_object_refname_ambiguity; | |
654 | extern const char *apply_default_whitespace; | |
655 | extern const char *apply_default_ignorewhitespace; | |
656 | extern const char *git_attributes_file; | |
657 | extern const char *git_hooks_path; | |
658 | extern int zlib_compression_level; | |
659 | extern int core_compression_level; | |
660 | extern int core_compression_seen; | |
661 | extern size_t packed_git_window_size; | |
662 | extern size_t packed_git_limit; | |
663 | extern size_t delta_base_cache_limit; | |
664 | extern unsigned long big_file_threshold; | |
665 | extern unsigned long pack_size_limit_cfg; | |
666 | ||
667 | void set_shared_repository(int value); | |
668 | int get_shared_repository(void); | |
669 | ||
670 | /* | |
671 | * Do replace refs need to be checked this run? This variable is | |
672 | * initialized to true unless --no-replace-object is used or | |
673 | * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some | |
674 | * commands that do not want replace references to be active. As an | |
675 | * optimization it is also set to false if replace references have | |
676 | * been sought but there were none. | |
677 | */ | |
678 | extern int check_replace_refs; | |
679 | extern char *git_replace_ref_base; | |
680 | ||
681 | extern int fsync_object_files; | |
682 | extern int core_preload_index; | |
683 | extern int core_apply_sparse_checkout; | |
684 | extern int precomposed_unicode; | |
685 | extern int protect_hfs; | |
686 | extern int protect_ntfs; | |
687 | extern int git_db_env, git_index_env, git_graft_env, git_common_dir_env; | |
688 | ||
689 | /* | |
690 | * Include broken refs in all ref iterations, which will | |
691 | * generally choke dangerous operations rather than letting | |
692 | * them silently proceed without taking the broken ref into | |
693 | * account. | |
694 | */ | |
695 | extern int ref_paranoia; | |
696 | ||
697 | /* | |
698 | * The character that begins a commented line in user-editable file | |
699 | * that is subject to stripspace. | |
700 | */ | |
701 | extern char comment_line_char; | |
702 | extern int auto_comment_line_char; | |
703 | ||
704 | /* Windows only */ | |
705 | enum hide_dotfiles_type { | |
706 | HIDE_DOTFILES_FALSE = 0, | |
707 | HIDE_DOTFILES_TRUE, | |
708 | HIDE_DOTFILES_DOTGITONLY | |
709 | }; | |
710 | extern enum hide_dotfiles_type hide_dotfiles; | |
711 | ||
712 | enum branch_track { | |
713 | BRANCH_TRACK_UNSPECIFIED = -1, | |
714 | BRANCH_TRACK_NEVER = 0, | |
715 | BRANCH_TRACK_REMOTE, | |
716 | BRANCH_TRACK_ALWAYS, | |
717 | BRANCH_TRACK_EXPLICIT, | |
718 | BRANCH_TRACK_OVERRIDE | |
719 | }; | |
720 | ||
721 | enum rebase_setup_type { | |
722 | AUTOREBASE_NEVER = 0, | |
723 | AUTOREBASE_LOCAL, | |
724 | AUTOREBASE_REMOTE, | |
725 | AUTOREBASE_ALWAYS | |
726 | }; | |
727 | ||
728 | enum push_default_type { | |
729 | PUSH_DEFAULT_NOTHING = 0, | |
730 | PUSH_DEFAULT_MATCHING, | |
731 | PUSH_DEFAULT_SIMPLE, | |
732 | PUSH_DEFAULT_UPSTREAM, | |
733 | PUSH_DEFAULT_CURRENT, | |
734 | PUSH_DEFAULT_UNSPECIFIED | |
735 | }; | |
736 | ||
737 | extern enum branch_track git_branch_track; | |
738 | extern enum rebase_setup_type autorebase; | |
739 | extern enum push_default_type push_default; | |
740 | ||
741 | enum object_creation_mode { | |
742 | OBJECT_CREATION_USES_HARDLINKS = 0, | |
743 | OBJECT_CREATION_USES_RENAMES = 1 | |
744 | }; | |
745 | ||
746 | extern enum object_creation_mode object_creation_mode; | |
747 | ||
748 | extern char *notes_ref_name; | |
749 | ||
750 | extern int grafts_replace_parents; | |
751 | ||
752 | /* | |
753 | * GIT_REPO_VERSION is the version we write by default. The | |
754 | * _READ variant is the highest number we know how to | |
755 | * handle. | |
756 | */ | |
757 | #define GIT_REPO_VERSION 0 | |
758 | #define GIT_REPO_VERSION_READ 1 | |
759 | extern int repository_format_precious_objects; | |
760 | ||
761 | struct repository_format { | |
762 | int version; | |
763 | int precious_objects; | |
764 | int is_bare; | |
765 | char *work_tree; | |
766 | struct string_list unknown_extensions; | |
767 | }; | |
768 | ||
769 | /* | |
770 | * Read the repository format characteristics from the config file "path" into | |
771 | * "format" struct. Returns the numeric version. On error, -1 is returned, | |
772 | * format->version is set to -1, and all other fields in the struct are | |
773 | * undefined. | |
774 | */ | |
775 | int read_repository_format(struct repository_format *format, const char *path); | |
776 | ||
777 | /* | |
778 | * Verify that the repository described by repository_format is something we | |
779 | * can read. If it is, return 0. Otherwise, return -1, and "err" will describe | |
780 | * any errors encountered. | |
781 | */ | |
782 | int verify_repository_format(const struct repository_format *format, | |
783 | struct strbuf *err); | |
784 | ||
785 | /* | |
786 | * Check the repository format version in the path found in get_git_dir(), | |
787 | * and die if it is a version we don't understand. Generally one would | |
788 | * set_git_dir() before calling this, and use it only for "are we in a valid | |
789 | * repo?". | |
790 | */ | |
791 | extern void check_repository_format(void); | |
792 | ||
793 | #define MTIME_CHANGED 0x0001 | |
794 | #define CTIME_CHANGED 0x0002 | |
795 | #define OWNER_CHANGED 0x0004 | |
796 | #define MODE_CHANGED 0x0008 | |
797 | #define INODE_CHANGED 0x0010 | |
798 | #define DATA_CHANGED 0x0020 | |
799 | #define TYPE_CHANGED 0x0040 | |
800 | ||
801 | /* | |
802 | * Return a statically allocated filename, either generically (mkpath), in | |
803 | * the repository directory (git_path), or in a submodule's repository | |
804 | * directory (git_path_submodule). In all cases, note that the result | |
805 | * may be overwritten by another call to _any_ of the functions. Consider | |
806 | * using the safer "dup" or "strbuf" formats below (in some cases, the | |
807 | * unsafe versions have already been removed). | |
808 | */ | |
809 | extern const char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); | |
810 | extern const char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); | |
811 | extern const char *git_common_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); | |
812 | ||
813 | extern char *mksnpath(char *buf, size_t n, const char *fmt, ...) | |
814 | __attribute__((format (printf, 3, 4))); | |
815 | extern void strbuf_git_path(struct strbuf *sb, const char *fmt, ...) | |
816 | __attribute__((format (printf, 2, 3))); | |
817 | extern void strbuf_git_common_path(struct strbuf *sb, const char *fmt, ...) | |
818 | __attribute__((format (printf, 2, 3))); | |
819 | extern char *git_path_buf(struct strbuf *buf, const char *fmt, ...) | |
820 | __attribute__((format (printf, 2, 3))); | |
821 | extern void strbuf_git_path_submodule(struct strbuf *sb, const char *path, | |
822 | const char *fmt, ...) | |
823 | __attribute__((format (printf, 3, 4))); | |
824 | extern char *git_pathdup(const char *fmt, ...) | |
825 | __attribute__((format (printf, 1, 2))); | |
826 | extern char *mkpathdup(const char *fmt, ...) | |
827 | __attribute__((format (printf, 1, 2))); | |
828 | extern char *git_pathdup_submodule(const char *path, const char *fmt, ...) | |
829 | __attribute__((format (printf, 2, 3))); | |
830 | ||
831 | extern void report_linked_checkout_garbage(void); | |
832 | ||
833 | /* | |
834 | * You can define a static memoized git path like: | |
835 | * | |
836 | * static GIT_PATH_FUNC(git_path_foo, "FOO"); | |
837 | * | |
838 | * or use one of the global ones below. | |
839 | */ | |
840 | #define GIT_PATH_FUNC(func, filename) \ | |
841 | const char *func(void) \ | |
842 | { \ | |
843 | static char *ret; \ | |
844 | if (!ret) \ | |
845 | ret = git_pathdup(filename); \ | |
846 | return ret; \ | |
847 | } | |
848 | ||
849 | const char *git_path_cherry_pick_head(void); | |
850 | const char *git_path_revert_head(void); | |
851 | const char *git_path_squash_msg(void); | |
852 | const char *git_path_merge_msg(void); | |
853 | const char *git_path_merge_rr(void); | |
854 | const char *git_path_merge_mode(void); | |
855 | const char *git_path_merge_head(void); | |
856 | const char *git_path_fetch_head(void); | |
857 | const char *git_path_shallow(void); | |
858 | ||
859 | /* | |
860 | * Return the name of the file in the local object database that would | |
861 | * be used to store a loose object with the specified sha1. The | |
862 | * return value is a pointer to a statically allocated buffer that is | |
863 | * overwritten each time the function is called. | |
864 | */ | |
865 | extern const char *sha1_file_name(const unsigned char *sha1); | |
866 | ||
867 | /* | |
868 | * Return the name of the (local) packfile with the specified sha1 in | |
869 | * its name. The return value is a pointer to memory that is | |
870 | * overwritten each time this function is called. | |
871 | */ | |
872 | extern char *sha1_pack_name(const unsigned char *sha1); | |
873 | ||
874 | /* | |
875 | * Return the name of the (local) pack index file with the specified | |
876 | * sha1 in its name. The return value is a pointer to memory that is | |
877 | * overwritten each time this function is called. | |
878 | */ | |
879 | extern char *sha1_pack_index_name(const unsigned char *sha1); | |
880 | ||
881 | /* | |
882 | * Return an abbreviated sha1 unique within this repository's object database. | |
883 | * The result will be at least `len` characters long, and will be NUL | |
884 | * terminated. | |
885 | * | |
886 | * The non-`_r` version returns a static buffer which will be overwritten by | |
887 | * subsequent calls. | |
888 | * | |
889 | * The `_r` variant writes to a buffer supplied by the caller, which must be at | |
890 | * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes | |
891 | * written (excluding the NUL terminator). | |
892 | * | |
893 | * Note that while this version avoids the static buffer, it is not fully | |
894 | * reentrant, as it calls into other non-reentrant git code. | |
895 | */ | |
896 | extern const char *find_unique_abbrev(const unsigned char *sha1, int len); | |
897 | extern int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len); | |
898 | ||
899 | extern const unsigned char null_sha1[GIT_SHA1_RAWSZ]; | |
900 | extern const struct object_id null_oid; | |
901 | ||
902 | static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) | |
903 | { | |
904 | int i; | |
905 | ||
906 | for (i = 0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { | |
907 | if (*sha1 != *sha2) | |
908 | return *sha1 - *sha2; | |
909 | } | |
910 | ||
911 | return 0; | |
912 | } | |
913 | ||
914 | static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) | |
915 | { | |
916 | return hashcmp(oid1->hash, oid2->hash); | |
917 | } | |
918 | ||
919 | static inline int is_null_sha1(const unsigned char *sha1) | |
920 | { | |
921 | return !hashcmp(sha1, null_sha1); | |
922 | } | |
923 | ||
924 | static inline int is_null_oid(const struct object_id *oid) | |
925 | { | |
926 | return !hashcmp(oid->hash, null_sha1); | |
927 | } | |
928 | ||
929 | static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) | |
930 | { | |
931 | memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); | |
932 | } | |
933 | ||
934 | static inline void oidcpy(struct object_id *dst, const struct object_id *src) | |
935 | { | |
936 | hashcpy(dst->hash, src->hash); | |
937 | } | |
938 | ||
939 | static inline void hashclr(unsigned char *hash) | |
940 | { | |
941 | memset(hash, 0, GIT_SHA1_RAWSZ); | |
942 | } | |
943 | ||
944 | static inline void oidclr(struct object_id *oid) | |
945 | { | |
946 | hashclr(oid->hash); | |
947 | } | |
948 | ||
949 | ||
950 | #define EMPTY_TREE_SHA1_HEX \ | |
951 | "4b825dc642cb6eb9a060e54bf8d69288fbee4904" | |
952 | #define EMPTY_TREE_SHA1_BIN_LITERAL \ | |
953 | "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ | |
954 | "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" | |
955 | #define EMPTY_TREE_SHA1_BIN \ | |
956 | ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL) | |
957 | ||
958 | #define EMPTY_BLOB_SHA1_HEX \ | |
959 | "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" | |
960 | #define EMPTY_BLOB_SHA1_BIN_LITERAL \ | |
961 | "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ | |
962 | "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" | |
963 | #define EMPTY_BLOB_SHA1_BIN \ | |
964 | ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL) | |
965 | ||
966 | static inline int is_empty_blob_sha1(const unsigned char *sha1) | |
967 | { | |
968 | return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); | |
969 | } | |
970 | ||
971 | int git_mkstemp(char *path, size_t n, const char *template); | |
972 | ||
973 | /* set default permissions by passing mode arguments to open(2) */ | |
974 | int git_mkstemps_mode(char *pattern, int suffix_len, int mode); | |
975 | int git_mkstemp_mode(char *pattern, int mode); | |
976 | ||
977 | /* | |
978 | * NOTE NOTE NOTE!! | |
979 | * | |
980 | * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must | |
981 | * not be changed. Old repositories have core.sharedrepository written in | |
982 | * numeric format, and therefore these values are preserved for compatibility | |
983 | * reasons. | |
984 | */ | |
985 | enum sharedrepo { | |
986 | PERM_UMASK = 0, | |
987 | OLD_PERM_GROUP = 1, | |
988 | OLD_PERM_EVERYBODY = 2, | |
989 | PERM_GROUP = 0660, | |
990 | PERM_EVERYBODY = 0664 | |
991 | }; | |
992 | int git_config_perm(const char *var, const char *value); | |
993 | int adjust_shared_perm(const char *path); | |
994 | ||
995 | /* | |
996 | * Create the directory containing the named path, using care to be | |
997 | * somewhat safe against races. Return one of the scld_error values | |
998 | * to indicate success/failure. | |
999 | * | |
1000 | * SCLD_VANISHED indicates that one of the ancestor directories of the | |
1001 | * path existed at one point during the function call and then | |
1002 | * suddenly vanished, probably because another process pruned the | |
1003 | * directory while we were working. To be robust against this kind of | |
1004 | * race, callers might want to try invoking the function again when it | |
1005 | * returns SCLD_VANISHED. | |
1006 | */ | |
1007 | enum scld_error { | |
1008 | SCLD_OK = 0, | |
1009 | SCLD_FAILED = -1, | |
1010 | SCLD_PERMS = -2, | |
1011 | SCLD_EXISTS = -3, | |
1012 | SCLD_VANISHED = -4 | |
1013 | }; | |
1014 | enum scld_error safe_create_leading_directories(char *path); | |
1015 | enum scld_error safe_create_leading_directories_const(const char *path); | |
1016 | ||
1017 | int mkdir_in_gitdir(const char *path); | |
1018 | extern char *expand_user_path(const char *path); | |
1019 | const char *enter_repo(const char *path, int strict); | |
1020 | static inline int is_absolute_path(const char *path) | |
1021 | { | |
1022 | return is_dir_sep(path[0]) || has_dos_drive_prefix(path); | |
1023 | } | |
1024 | int is_directory(const char *); | |
1025 | const char *real_path(const char *path); | |
1026 | const char *real_path_if_valid(const char *path); | |
1027 | const char *absolute_path(const char *path); | |
1028 | const char *remove_leading_path(const char *in, const char *prefix); | |
1029 | const char *relative_path(const char *in, const char *prefix, struct strbuf *sb); | |
1030 | int normalize_path_copy_len(char *dst, const char *src, int *prefix_len); | |
1031 | int normalize_path_copy(char *dst, const char *src); | |
1032 | int longest_ancestor_length(const char *path, struct string_list *prefixes); | |
1033 | char *strip_path_suffix(const char *path, const char *suffix); | |
1034 | int daemon_avoid_alias(const char *path); | |
1035 | extern int is_ntfs_dotgit(const char *name); | |
1036 | ||
1037 | /** | |
1038 | * Return a newly allocated string with the evaluation of | |
1039 | * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise | |
1040 | * "$HOME/.config/git/$filename". Return NULL upon error. | |
1041 | */ | |
1042 | extern char *xdg_config_home(const char *filename); | |
1043 | ||
1044 | /* object replacement */ | |
1045 | #define LOOKUP_REPLACE_OBJECT 1 | |
1046 | #define LOOKUP_UNKNOWN_OBJECT 2 | |
1047 | extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag); | |
1048 | static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size) | |
1049 | { | |
1050 | return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT); | |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * This internal function is only declared here for the benefit of | |
1055 | * lookup_replace_object(). Please do not call it directly. | |
1056 | */ | |
1057 | extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1); | |
1058 | ||
1059 | /* | |
1060 | * If object sha1 should be replaced, return the replacement object's | |
1061 | * name (replaced recursively, if necessary). The return value is | |
1062 | * either sha1 or a pointer to a permanently-allocated value. When | |
1063 | * object replacement is suppressed, always return sha1. | |
1064 | */ | |
1065 | static inline const unsigned char *lookup_replace_object(const unsigned char *sha1) | |
1066 | { | |
1067 | if (!check_replace_refs) | |
1068 | return sha1; | |
1069 | return do_lookup_replace_object(sha1); | |
1070 | } | |
1071 | ||
1072 | static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag) | |
1073 | { | |
1074 | if (!(flag & LOOKUP_REPLACE_OBJECT)) | |
1075 | return sha1; | |
1076 | return lookup_replace_object(sha1); | |
1077 | } | |
1078 | ||
1079 | /* Read and unpack a sha1 file into memory, write memory to a sha1 file */ | |
1080 | extern int sha1_object_info(const unsigned char *, unsigned long *); | |
1081 | extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1); | |
1082 | extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1); | |
1083 | extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, unsigned char *sha1, unsigned flags); | |
1084 | extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *); | |
1085 | extern int force_object_loose(const unsigned char *sha1, time_t mtime); | |
1086 | extern int git_open_noatime(const char *name); | |
1087 | extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size); | |
1088 | extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz); | |
1089 | extern int parse_sha1_header(const char *hdr, unsigned long *sizep); | |
1090 | ||
1091 | /* global flag to enable extra checks when accessing packed objects */ | |
1092 | extern int do_check_packed_object_crc; | |
1093 | ||
1094 | extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); | |
1095 | ||
1096 | extern int finalize_object_file(const char *tmpfile, const char *filename); | |
1097 | ||
1098 | extern int has_sha1_pack(const unsigned char *sha1); | |
1099 | ||
1100 | /* | |
1101 | * Return true iff we have an object named sha1, whether local or in | |
1102 | * an alternate object database, and whether packed or loose. This | |
1103 | * function does not respect replace references. | |
1104 | * | |
1105 | * If the QUICK flag is set, do not re-check the pack directory | |
1106 | * when we cannot find the object (this means we may give a false | |
1107 | * negative answer if another process is simultaneously repacking). | |
1108 | */ | |
1109 | #define HAS_SHA1_QUICK 0x1 | |
1110 | extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags); | |
1111 | static inline int has_sha1_file(const unsigned char *sha1) | |
1112 | { | |
1113 | return has_sha1_file_with_flags(sha1, 0); | |
1114 | } | |
1115 | ||
1116 | /* Same as the above, except for struct object_id. */ | |
1117 | extern int has_object_file(const struct object_id *oid); | |
1118 | ||
1119 | /* | |
1120 | * Return true iff an alternate object database has a loose object | |
1121 | * with the specified name. This function does not respect replace | |
1122 | * references. | |
1123 | */ | |
1124 | extern int has_loose_object_nonlocal(const unsigned char *sha1); | |
1125 | ||
1126 | extern int has_pack_index(const unsigned char *sha1); | |
1127 | ||
1128 | extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect); | |
1129 | ||
1130 | extern const signed char hexval_table[256]; | |
1131 | static inline unsigned int hexval(unsigned char c) | |
1132 | { | |
1133 | return hexval_table[c]; | |
1134 | } | |
1135 | ||
1136 | /* Convert to/from hex/sha1 representation */ | |
1137 | #define MINIMUM_ABBREV minimum_abbrev | |
1138 | #define DEFAULT_ABBREV default_abbrev | |
1139 | ||
1140 | struct object_context { | |
1141 | unsigned char tree[20]; | |
1142 | char path[PATH_MAX]; | |
1143 | unsigned mode; | |
1144 | /* | |
1145 | * symlink_path is only used by get_tree_entry_follow_symlinks, | |
1146 | * and only for symlinks that point outside the repository. | |
1147 | */ | |
1148 | struct strbuf symlink_path; | |
1149 | }; | |
1150 | ||
1151 | #define GET_SHA1_QUIETLY 01 | |
1152 | #define GET_SHA1_COMMIT 02 | |
1153 | #define GET_SHA1_COMMITTISH 04 | |
1154 | #define GET_SHA1_TREE 010 | |
1155 | #define GET_SHA1_TREEISH 020 | |
1156 | #define GET_SHA1_BLOB 040 | |
1157 | #define GET_SHA1_FOLLOW_SYMLINKS 0100 | |
1158 | #define GET_SHA1_ONLY_TO_DIE 04000 | |
1159 | ||
1160 | extern int get_sha1(const char *str, unsigned char *sha1); | |
1161 | extern int get_sha1_commit(const char *str, unsigned char *sha1); | |
1162 | extern int get_sha1_committish(const char *str, unsigned char *sha1); | |
1163 | extern int get_sha1_tree(const char *str, unsigned char *sha1); | |
1164 | extern int get_sha1_treeish(const char *str, unsigned char *sha1); | |
1165 | extern int get_sha1_blob(const char *str, unsigned char *sha1); | |
1166 | extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix); | |
1167 | extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc); | |
1168 | ||
1169 | extern int get_oid(const char *str, struct object_id *oid); | |
1170 | ||
1171 | typedef int each_abbrev_fn(const unsigned char *sha1, void *); | |
1172 | extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *); | |
1173 | ||
1174 | /* | |
1175 | * Try to read a SHA1 in hexadecimal format from the 40 characters | |
1176 | * starting at hex. Write the 20-byte result to sha1 in binary form. | |
1177 | * Return 0 on success. Reading stops if a NUL is encountered in the | |
1178 | * input, so it is safe to pass this function an arbitrary | |
1179 | * null-terminated string. | |
1180 | */ | |
1181 | extern int get_sha1_hex(const char *hex, unsigned char *sha1); | |
1182 | extern int get_oid_hex(const char *hex, struct object_id *sha1); | |
1183 | ||
1184 | /* | |
1185 | * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant, | |
1186 | * and writes the NUL-terminated output to the buffer `out`, which must be at | |
1187 | * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for | |
1188 | * convenience. | |
1189 | * | |
1190 | * The non-`_r` variant returns a static buffer, but uses a ring of 4 | |
1191 | * buffers, making it safe to make multiple calls for a single statement, like: | |
1192 | * | |
1193 | * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two)); | |
1194 | */ | |
1195 | extern char *sha1_to_hex_r(char *out, const unsigned char *sha1); | |
1196 | extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */ | |
1197 | extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */ | |
1198 | ||
1199 | extern int interpret_branch_name(const char *str, int len, struct strbuf *); | |
1200 | extern int get_sha1_mb(const char *str, unsigned char *sha1); | |
1201 | ||
1202 | extern int validate_headref(const char *ref); | |
1203 | ||
1204 | extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2); | |
1205 | extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2); | |
1206 | extern int name_compare(const char *name1, size_t len1, const char *name2, size_t len2); | |
1207 | extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2); | |
1208 | ||
1209 | extern void *read_object_with_reference(const unsigned char *sha1, | |
1210 | const char *required_type, | |
1211 | unsigned long *size, | |
1212 | unsigned char *sha1_ret); | |
1213 | ||
1214 | extern struct object *peel_to_type(const char *name, int namelen, | |
1215 | struct object *o, enum object_type); | |
1216 | ||
1217 | struct date_mode { | |
1218 | enum date_mode_type { | |
1219 | DATE_NORMAL = 0, | |
1220 | DATE_RELATIVE, | |
1221 | DATE_SHORT, | |
1222 | DATE_ISO8601, | |
1223 | DATE_ISO8601_STRICT, | |
1224 | DATE_RFC2822, | |
1225 | DATE_STRFTIME, | |
1226 | DATE_RAW | |
1227 | } type; | |
1228 | const char *strftime_fmt; | |
1229 | int local; | |
1230 | }; | |
1231 | ||
1232 | /* | |
1233 | * Convenience helper for passing a constant type, like: | |
1234 | * | |
1235 | * show_date(t, tz, DATE_MODE(NORMAL)); | |
1236 | */ | |
1237 | #define DATE_MODE(t) date_mode_from_type(DATE_##t) | |
1238 | struct date_mode *date_mode_from_type(enum date_mode_type type); | |
1239 | ||
1240 | const char *show_date(unsigned long time, int timezone, const struct date_mode *mode); | |
1241 | void show_date_relative(unsigned long time, int tz, const struct timeval *now, | |
1242 | struct strbuf *timebuf); | |
1243 | int parse_date(const char *date, struct strbuf *out); | |
1244 | int parse_date_basic(const char *date, unsigned long *timestamp, int *offset); | |
1245 | int parse_expiry_date(const char *date, unsigned long *timestamp); | |
1246 | void datestamp(struct strbuf *out); | |
1247 | #define approxidate(s) approxidate_careful((s), NULL) | |
1248 | unsigned long approxidate_careful(const char *, int *); | |
1249 | unsigned long approxidate_relative(const char *date, const struct timeval *now); | |
1250 | void parse_date_format(const char *format, struct date_mode *mode); | |
1251 | int date_overflows(unsigned long date); | |
1252 | ||
1253 | #define IDENT_STRICT 1 | |
1254 | #define IDENT_NO_DATE 2 | |
1255 | #define IDENT_NO_NAME 4 | |
1256 | extern const char *git_author_info(int); | |
1257 | extern const char *git_committer_info(int); | |
1258 | extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int); | |
1259 | extern const char *fmt_name(const char *name, const char *email); | |
1260 | extern const char *ident_default_name(void); | |
1261 | extern const char *ident_default_email(void); | |
1262 | extern const char *git_editor(void); | |
1263 | extern const char *git_pager(int stdout_is_tty); | |
1264 | extern int git_ident_config(const char *, const char *, void *); | |
1265 | ||
1266 | struct ident_split { | |
1267 | const char *name_begin; | |
1268 | const char *name_end; | |
1269 | const char *mail_begin; | |
1270 | const char *mail_end; | |
1271 | const char *date_begin; | |
1272 | const char *date_end; | |
1273 | const char *tz_begin; | |
1274 | const char *tz_end; | |
1275 | }; | |
1276 | /* | |
1277 | * Signals an success with 0, but time part of the result may be NULL | |
1278 | * if the input lacks timestamp and zone | |
1279 | */ | |
1280 | extern int split_ident_line(struct ident_split *, const char *, int); | |
1281 | ||
1282 | /* | |
1283 | * Like show_date, but pull the timestamp and tz parameters from | |
1284 | * the ident_split. It will also sanity-check the values and produce | |
1285 | * a well-known sentinel date if they appear bogus. | |
1286 | */ | |
1287 | const char *show_ident_date(const struct ident_split *id, | |
1288 | const struct date_mode *mode); | |
1289 | ||
1290 | /* | |
1291 | * Compare split idents for equality or strict ordering. Note that we | |
1292 | * compare only the ident part of the line, ignoring any timestamp. | |
1293 | * | |
1294 | * Because there are two fields, we must choose one as the primary key; we | |
1295 | * currently arbitrarily pick the email. | |
1296 | */ | |
1297 | extern int ident_cmp(const struct ident_split *, const struct ident_split *); | |
1298 | ||
1299 | struct checkout { | |
1300 | struct index_state *istate; | |
1301 | const char *base_dir; | |
1302 | int base_dir_len; | |
1303 | unsigned force:1, | |
1304 | quiet:1, | |
1305 | not_new:1, | |
1306 | refresh_cache:1; | |
1307 | }; | |
1308 | ||
1309 | #define TEMPORARY_FILENAME_LENGTH 25 | |
1310 | extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath); | |
1311 | ||
1312 | struct cache_def { | |
1313 | struct strbuf path; | |
1314 | int flags; | |
1315 | int track_flags; | |
1316 | int prefix_len_stat_func; | |
1317 | }; | |
1318 | #define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 } | |
1319 | static inline void cache_def_clear(struct cache_def *cache) | |
1320 | { | |
1321 | strbuf_release(&cache->path); | |
1322 | } | |
1323 | ||
1324 | extern int has_symlink_leading_path(const char *name, int len); | |
1325 | extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int); | |
1326 | extern int check_leading_path(const char *name, int len); | |
1327 | extern int has_dirs_only_path(const char *name, int len, int prefix_len); | |
1328 | extern void schedule_dir_for_removal(const char *name, int len); | |
1329 | extern void remove_scheduled_dirs(void); | |
1330 | ||
1331 | extern struct alternate_object_database { | |
1332 | struct alternate_object_database *next; | |
1333 | char *name; | |
1334 | char base[FLEX_ARRAY]; /* more */ | |
1335 | } *alt_odb_list; | |
1336 | extern void prepare_alt_odb(void); | |
1337 | extern void read_info_alternates(const char * relative_base, int depth); | |
1338 | extern void add_to_alternates_file(const char *reference); | |
1339 | typedef int alt_odb_fn(struct alternate_object_database *, void *); | |
1340 | extern int foreach_alt_odb(alt_odb_fn, void*); | |
1341 | ||
1342 | struct pack_window { | |
1343 | struct pack_window *next; | |
1344 | unsigned char *base; | |
1345 | off_t offset; | |
1346 | size_t len; | |
1347 | unsigned int last_used; | |
1348 | unsigned int inuse_cnt; | |
1349 | }; | |
1350 | ||
1351 | extern struct packed_git { | |
1352 | struct packed_git *next; | |
1353 | struct pack_window *windows; | |
1354 | off_t pack_size; | |
1355 | const void *index_data; | |
1356 | size_t index_size; | |
1357 | uint32_t num_objects; | |
1358 | uint32_t num_bad_objects; | |
1359 | unsigned char *bad_object_sha1; | |
1360 | int index_version; | |
1361 | time_t mtime; | |
1362 | int pack_fd; | |
1363 | unsigned pack_local:1, | |
1364 | pack_keep:1, | |
1365 | freshened:1, | |
1366 | do_not_close:1; | |
1367 | unsigned char sha1[20]; | |
1368 | struct revindex_entry *revindex; | |
1369 | /* something like ".git/objects/pack/xxxxx.pack" */ | |
1370 | char pack_name[FLEX_ARRAY]; /* more */ | |
1371 | } *packed_git; | |
1372 | ||
1373 | struct pack_entry { | |
1374 | off_t offset; | |
1375 | unsigned char sha1[20]; | |
1376 | struct packed_git *p; | |
1377 | }; | |
1378 | ||
1379 | extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path); | |
1380 | ||
1381 | /* A hook to report invalid files in pack directory */ | |
1382 | #define PACKDIR_FILE_PACK 1 | |
1383 | #define PACKDIR_FILE_IDX 2 | |
1384 | #define PACKDIR_FILE_GARBAGE 4 | |
1385 | extern void (*report_garbage)(unsigned seen_bits, const char *path); | |
1386 | ||
1387 | extern void prepare_packed_git(void); | |
1388 | extern void reprepare_packed_git(void); | |
1389 | extern void install_packed_git(struct packed_git *pack); | |
1390 | ||
1391 | extern struct packed_git *find_sha1_pack(const unsigned char *sha1, | |
1392 | struct packed_git *packs); | |
1393 | ||
1394 | extern void pack_report(void); | |
1395 | ||
1396 | /* | |
1397 | * mmap the index file for the specified packfile (if it is not | |
1398 | * already mmapped). Return 0 on success. | |
1399 | */ | |
1400 | extern int open_pack_index(struct packed_git *); | |
1401 | ||
1402 | /* | |
1403 | * munmap the index file for the specified packfile (if it is | |
1404 | * currently mmapped). | |
1405 | */ | |
1406 | extern void close_pack_index(struct packed_git *); | |
1407 | ||
1408 | extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *); | |
1409 | extern void close_pack_windows(struct packed_git *); | |
1410 | extern void close_all_packs(void); | |
1411 | extern void unuse_pack(struct pack_window **); | |
1412 | extern void free_pack_by_name(const char *); | |
1413 | extern void clear_delta_base_cache(void); | |
1414 | extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local); | |
1415 | ||
1416 | /* | |
1417 | * Make sure that a pointer access into an mmap'd index file is within bounds, | |
1418 | * and can provide at least 8 bytes of data. | |
1419 | * | |
1420 | * Note that this is only necessary for variable-length segments of the file | |
1421 | * (like the 64-bit extended offset table), as we compare the size to the | |
1422 | * fixed-length parts when we open the file. | |
1423 | */ | |
1424 | extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr); | |
1425 | ||
1426 | /* | |
1427 | * Return the SHA-1 of the nth object within the specified packfile. | |
1428 | * Open the index if it is not already open. The return value points | |
1429 | * at the SHA-1 within the mmapped index. Return NULL if there is an | |
1430 | * error. | |
1431 | */ | |
1432 | extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n); | |
1433 | ||
1434 | /* | |
1435 | * Return the offset of the nth object within the specified packfile. | |
1436 | * The index must already be opened. | |
1437 | */ | |
1438 | extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n); | |
1439 | ||
1440 | /* | |
1441 | * If the object named sha1 is present in the specified packfile, | |
1442 | * return its offset within the packfile; otherwise, return 0. | |
1443 | */ | |
1444 | extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *); | |
1445 | ||
1446 | extern int is_pack_valid(struct packed_git *); | |
1447 | extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *); | |
1448 | extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep); | |
1449 | extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t); | |
1450 | extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *); | |
1451 | ||
1452 | /* | |
1453 | * Iterate over the files in the loose-object parts of the object | |
1454 | * directory "path", triggering the following callbacks: | |
1455 | * | |
1456 | * - loose_object is called for each loose object we find. | |
1457 | * | |
1458 | * - loose_cruft is called for any files that do not appear to be | |
1459 | * loose objects. Note that we only look in the loose object | |
1460 | * directories "objects/[0-9a-f]{2}/", so we will not report | |
1461 | * "objects/foobar" as cruft. | |
1462 | * | |
1463 | * - loose_subdir is called for each top-level hashed subdirectory | |
1464 | * of the object directory (e.g., "$OBJDIR/f0"). It is called | |
1465 | * after the objects in the directory are processed. | |
1466 | * | |
1467 | * Any callback that is NULL will be ignored. Callbacks returning non-zero | |
1468 | * will end the iteration. | |
1469 | * | |
1470 | * In the "buf" variant, "path" is a strbuf which will also be used as a | |
1471 | * scratch buffer, but restored to its original contents before | |
1472 | * the function returns. | |
1473 | */ | |
1474 | typedef int each_loose_object_fn(const unsigned char *sha1, | |
1475 | const char *path, | |
1476 | void *data); | |
1477 | typedef int each_loose_cruft_fn(const char *basename, | |
1478 | const char *path, | |
1479 | void *data); | |
1480 | typedef int each_loose_subdir_fn(int nr, | |
1481 | const char *path, | |
1482 | void *data); | |
1483 | int for_each_loose_file_in_objdir(const char *path, | |
1484 | each_loose_object_fn obj_cb, | |
1485 | each_loose_cruft_fn cruft_cb, | |
1486 | each_loose_subdir_fn subdir_cb, | |
1487 | void *data); | |
1488 | int for_each_loose_file_in_objdir_buf(struct strbuf *path, | |
1489 | each_loose_object_fn obj_cb, | |
1490 | each_loose_cruft_fn cruft_cb, | |
1491 | each_loose_subdir_fn subdir_cb, | |
1492 | void *data); | |
1493 | ||
1494 | /* | |
1495 | * Iterate over loose and packed objects in both the local | |
1496 | * repository and any alternates repositories (unless the | |
1497 | * LOCAL_ONLY flag is set). | |
1498 | */ | |
1499 | #define FOR_EACH_OBJECT_LOCAL_ONLY 0x1 | |
1500 | typedef int each_packed_object_fn(const unsigned char *sha1, | |
1501 | struct packed_git *pack, | |
1502 | uint32_t pos, | |
1503 | void *data); | |
1504 | extern int for_each_loose_object(each_loose_object_fn, void *, unsigned flags); | |
1505 | extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags); | |
1506 | ||
1507 | struct object_info { | |
1508 | /* Request */ | |
1509 | enum object_type *typep; | |
1510 | unsigned long *sizep; | |
1511 | unsigned long *disk_sizep; | |
1512 | unsigned char *delta_base_sha1; | |
1513 | struct strbuf *typename; | |
1514 | ||
1515 | /* Response */ | |
1516 | enum { | |
1517 | OI_CACHED, | |
1518 | OI_LOOSE, | |
1519 | OI_PACKED, | |
1520 | OI_DBCACHED | |
1521 | } whence; | |
1522 | union { | |
1523 | /* | |
1524 | * struct { | |
1525 | * ... Nothing to expose in this case | |
1526 | * } cached; | |
1527 | * struct { | |
1528 | * ... Nothing to expose in this case | |
1529 | * } loose; | |
1530 | */ | |
1531 | struct { | |
1532 | struct packed_git *pack; | |
1533 | off_t offset; | |
1534 | unsigned int is_delta; | |
1535 | } packed; | |
1536 | } u; | |
1537 | }; | |
1538 | extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags); | |
1539 | ||
1540 | /* Dumb servers support */ | |
1541 | extern int update_server_info(int); | |
1542 | ||
1543 | /* git_config_parse_key() returns these negated: */ | |
1544 | #define CONFIG_INVALID_KEY 1 | |
1545 | #define CONFIG_NO_SECTION_OR_NAME 2 | |
1546 | /* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */ | |
1547 | #define CONFIG_NO_LOCK -1 | |
1548 | #define CONFIG_INVALID_FILE 3 | |
1549 | #define CONFIG_NO_WRITE 4 | |
1550 | #define CONFIG_NOTHING_SET 5 | |
1551 | #define CONFIG_INVALID_PATTERN 6 | |
1552 | #define CONFIG_GENERIC_ERROR 7 | |
1553 | ||
1554 | #define CONFIG_REGEX_NONE ((void *)1) | |
1555 | ||
1556 | struct git_config_source { | |
1557 | unsigned int use_stdin:1; | |
1558 | const char *file; | |
1559 | const char *blob; | |
1560 | }; | |
1561 | ||
1562 | typedef int (*config_fn_t)(const char *, const char *, void *); | |
1563 | extern int git_default_config(const char *, const char *, void *); | |
1564 | extern int git_config_from_file(config_fn_t fn, const char *, void *); | |
1565 | extern int git_config_from_mem(config_fn_t fn, const char *origin_type, | |
1566 | const char *name, const char *buf, size_t len, void *data); | |
1567 | extern void git_config_push_parameter(const char *text); | |
1568 | extern int git_config_from_parameters(config_fn_t fn, void *data); | |
1569 | extern void git_config(config_fn_t fn, void *); | |
1570 | extern int git_config_with_options(config_fn_t fn, void *, | |
1571 | struct git_config_source *config_source, | |
1572 | int respect_includes); | |
1573 | extern int git_parse_ulong(const char *, unsigned long *); | |
1574 | extern int git_parse_maybe_bool(const char *); | |
1575 | extern int git_config_int(const char *, const char *); | |
1576 | extern int64_t git_config_int64(const char *, const char *); | |
1577 | extern unsigned long git_config_ulong(const char *, const char *); | |
1578 | extern int git_config_bool_or_int(const char *, const char *, int *); | |
1579 | extern int git_config_bool(const char *, const char *); | |
1580 | extern int git_config_maybe_bool(const char *, const char *); | |
1581 | extern int git_config_string(const char **, const char *, const char *); | |
1582 | extern int git_config_pathname(const char **, const char *, const char *); | |
1583 | extern int git_config_set_in_file_gently(const char *, const char *, const char *); | |
1584 | extern void git_config_set_in_file(const char *, const char *, const char *); | |
1585 | extern int git_config_set_gently(const char *, const char *); | |
1586 | extern void git_config_set(const char *, const char *); | |
1587 | extern int git_config_parse_key(const char *, char **, int *); | |
1588 | extern int git_config_key_is_valid(const char *key); | |
1589 | extern int git_config_set_multivar_gently(const char *, const char *, const char *, int); | |
1590 | extern void git_config_set_multivar(const char *, const char *, const char *, int); | |
1591 | extern int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, int); | |
1592 | extern void git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int); | |
1593 | extern int git_config_rename_section(const char *, const char *); | |
1594 | extern int git_config_rename_section_in_file(const char *, const char *, const char *); | |
1595 | extern const char *git_etc_gitconfig(void); | |
1596 | extern int git_env_bool(const char *, int); | |
1597 | extern unsigned long git_env_ulong(const char *, unsigned long); | |
1598 | extern int git_config_system(void); | |
1599 | extern int config_error_nonbool(const char *); | |
1600 | #if defined(__GNUC__) | |
1601 | #define config_error_nonbool(s) (config_error_nonbool(s), const_error()) | |
1602 | #endif | |
1603 | extern const char *get_log_output_encoding(void); | |
1604 | extern const char *get_commit_output_encoding(void); | |
1605 | ||
1606 | extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data); | |
1607 | extern const char *current_config_origin_type(void); | |
1608 | extern const char *current_config_name(void); | |
1609 | ||
1610 | struct config_include_data { | |
1611 | int depth; | |
1612 | config_fn_t fn; | |
1613 | void *data; | |
1614 | }; | |
1615 | #define CONFIG_INCLUDE_INIT { 0 } | |
1616 | extern int git_config_include(const char *name, const char *value, void *data); | |
1617 | ||
1618 | /* | |
1619 | * Match and parse a config key of the form: | |
1620 | * | |
1621 | * section.(subsection.)?key | |
1622 | * | |
1623 | * (i.e., what gets handed to a config_fn_t). The caller provides the section; | |
1624 | * we return -1 if it does not match, 0 otherwise. The subsection and key | |
1625 | * out-parameters are filled by the function (and subsection is NULL if it is | |
1626 | * missing). | |
1627 | */ | |
1628 | extern int parse_config_key(const char *var, | |
1629 | const char *section, | |
1630 | const char **subsection, int *subsection_len, | |
1631 | const char **key); | |
1632 | ||
1633 | struct config_set_element { | |
1634 | struct hashmap_entry ent; | |
1635 | char *key; | |
1636 | struct string_list value_list; | |
1637 | }; | |
1638 | ||
1639 | struct configset_list_item { | |
1640 | struct config_set_element *e; | |
1641 | int value_index; | |
1642 | }; | |
1643 | ||
1644 | /* | |
1645 | * the contents of the list are ordered according to their | |
1646 | * position in the config files and order of parsing the files. | |
1647 | * (i.e. key-value pair at the last position of .git/config will | |
1648 | * be at the last item of the list) | |
1649 | */ | |
1650 | struct configset_list { | |
1651 | struct configset_list_item *items; | |
1652 | unsigned int nr, alloc; | |
1653 | }; | |
1654 | ||
1655 | struct config_set { | |
1656 | struct hashmap config_hash; | |
1657 | int hash_initialized; | |
1658 | struct configset_list list; | |
1659 | }; | |
1660 | ||
1661 | extern void git_configset_init(struct config_set *cs); | |
1662 | extern int git_configset_add_file(struct config_set *cs, const char *filename); | |
1663 | extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value); | |
1664 | extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key); | |
1665 | extern void git_configset_clear(struct config_set *cs); | |
1666 | extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest); | |
1667 | extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest); | |
1668 | extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest); | |
1669 | extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest); | |
1670 | extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest); | |
1671 | extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest); | |
1672 | extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest); | |
1673 | extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest); | |
1674 | ||
1675 | extern int git_config_get_value(const char *key, const char **value); | |
1676 | extern const struct string_list *git_config_get_value_multi(const char *key); | |
1677 | extern void git_config_clear(void); | |
1678 | extern void git_config_iter(config_fn_t fn, void *data); | |
1679 | extern int git_config_get_string_const(const char *key, const char **dest); | |
1680 | extern int git_config_get_string(const char *key, char **dest); | |
1681 | extern int git_config_get_int(const char *key, int *dest); | |
1682 | extern int git_config_get_ulong(const char *key, unsigned long *dest); | |
1683 | extern int git_config_get_bool(const char *key, int *dest); | |
1684 | extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest); | |
1685 | extern int git_config_get_maybe_bool(const char *key, int *dest); | |
1686 | extern int git_config_get_pathname(const char *key, const char **dest); | |
1687 | extern int git_config_get_untracked_cache(void); | |
1688 | ||
1689 | /* | |
1690 | * This is a hack for test programs like test-dump-untracked-cache to | |
1691 | * ensure that they do not modify the untracked cache when reading it. | |
1692 | * Do not use it otherwise! | |
1693 | */ | |
1694 | extern int ignore_untracked_cache_config; | |
1695 | ||
1696 | struct key_value_info { | |
1697 | const char *filename; | |
1698 | int linenr; | |
1699 | }; | |
1700 | ||
1701 | extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3))); | |
1702 | extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr); | |
1703 | ||
1704 | extern int committer_ident_sufficiently_given(void); | |
1705 | extern int author_ident_sufficiently_given(void); | |
1706 | ||
1707 | extern const char *git_commit_encoding; | |
1708 | extern const char *git_log_output_encoding; | |
1709 | extern const char *git_mailmap_file; | |
1710 | extern const char *git_mailmap_blob; | |
1711 | ||
1712 | /* IO helper functions */ | |
1713 | extern void maybe_flush_or_die(FILE *, const char *); | |
1714 | __attribute__((format (printf, 2, 3))) | |
1715 | extern void fprintf_or_die(FILE *, const char *fmt, ...); | |
1716 | ||
1717 | #define COPY_READ_ERROR (-2) | |
1718 | #define COPY_WRITE_ERROR (-3) | |
1719 | extern int copy_fd(int ifd, int ofd); | |
1720 | extern int copy_file(const char *dst, const char *src, int mode); | |
1721 | extern int copy_file_with_time(const char *dst, const char *src, int mode); | |
1722 | ||
1723 | extern void write_or_die(int fd, const void *buf, size_t count); | |
1724 | extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg); | |
1725 | extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg); | |
1726 | extern void fsync_or_die(int fd, const char *); | |
1727 | ||
1728 | extern ssize_t read_in_full(int fd, void *buf, size_t count); | |
1729 | extern ssize_t write_in_full(int fd, const void *buf, size_t count); | |
1730 | extern ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset); | |
1731 | ||
1732 | static inline ssize_t write_str_in_full(int fd, const char *str) | |
1733 | { | |
1734 | return write_in_full(fd, str, strlen(str)); | |
1735 | } | |
1736 | ||
1737 | extern int write_file(const char *path, const char *fmt, ...); | |
1738 | extern int write_file_gently(const char *path, const char *fmt, ...); | |
1739 | ||
1740 | /* pager.c */ | |
1741 | extern void setup_pager(void); | |
1742 | extern const char *pager_program; | |
1743 | extern int pager_in_use(void); | |
1744 | extern int pager_use_color; | |
1745 | extern int term_columns(void); | |
1746 | extern int decimal_width(uintmax_t); | |
1747 | extern int check_pager_config(const char *cmd); | |
1748 | extern void prepare_pager_args(struct child_process *, const char *pager); | |
1749 | ||
1750 | extern const char *editor_program; | |
1751 | extern const char *askpass_program; | |
1752 | extern const char *excludes_file; | |
1753 | ||
1754 | /* base85 */ | |
1755 | int decode_85(char *dst, const char *line, int linelen); | |
1756 | void encode_85(char *buf, const unsigned char *data, int bytes); | |
1757 | ||
1758 | /* alloc.c */ | |
1759 | extern void *alloc_blob_node(void); | |
1760 | extern void *alloc_tree_node(void); | |
1761 | extern void *alloc_commit_node(void); | |
1762 | extern void *alloc_tag_node(void); | |
1763 | extern void *alloc_object_node(void); | |
1764 | extern void alloc_report(void); | |
1765 | extern unsigned int alloc_commit_index(void); | |
1766 | ||
1767 | /* pkt-line.c */ | |
1768 | void packet_trace_identity(const char *prog); | |
1769 | ||
1770 | /* add */ | |
1771 | /* | |
1772 | * return 0 if success, 1 - if addition of a file failed and | |
1773 | * ADD_FILES_IGNORE_ERRORS was specified in flags | |
1774 | */ | |
1775 | int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags); | |
1776 | ||
1777 | /* diff.c */ | |
1778 | extern int diff_auto_refresh_index; | |
1779 | ||
1780 | /* match-trees.c */ | |
1781 | void shift_tree(const struct object_id *, const struct object_id *, struct object_id *, int); | |
1782 | void shift_tree_by(const struct object_id *, const struct object_id *, struct object_id *, const char *); | |
1783 | ||
1784 | /* | |
1785 | * whitespace rules. | |
1786 | * used by both diff and apply | |
1787 | * last two digits are tab width | |
1788 | */ | |
1789 | #define WS_BLANK_AT_EOL 0100 | |
1790 | #define WS_SPACE_BEFORE_TAB 0200 | |
1791 | #define WS_INDENT_WITH_NON_TAB 0400 | |
1792 | #define WS_CR_AT_EOL 01000 | |
1793 | #define WS_BLANK_AT_EOF 02000 | |
1794 | #define WS_TAB_IN_INDENT 04000 | |
1795 | #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF) | |
1796 | #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8) | |
1797 | #define WS_TAB_WIDTH_MASK 077 | |
1798 | extern unsigned whitespace_rule_cfg; | |
1799 | extern unsigned whitespace_rule(const char *); | |
1800 | extern unsigned parse_whitespace_rule(const char *); | |
1801 | extern unsigned ws_check(const char *line, int len, unsigned ws_rule); | |
1802 | extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws); | |
1803 | extern char *whitespace_error_string(unsigned ws); | |
1804 | extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *); | |
1805 | extern int ws_blank_line(const char *line, int len, unsigned ws_rule); | |
1806 | #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK) | |
1807 | ||
1808 | /* ls-files */ | |
1809 | void overlay_tree_on_cache(const char *tree_name, const char *prefix); | |
1810 | ||
1811 | char *alias_lookup(const char *alias); | |
1812 | int split_cmdline(char *cmdline, const char ***argv); | |
1813 | /* Takes a negative value returned by split_cmdline */ | |
1814 | const char *split_cmdline_strerror(int cmdline_errno); | |
1815 | ||
1816 | /* setup.c */ | |
1817 | struct startup_info { | |
1818 | int have_repository; | |
1819 | const char *prefix; | |
1820 | }; | |
1821 | extern struct startup_info *startup_info; | |
1822 | ||
1823 | /* merge.c */ | |
1824 | struct commit_list; | |
1825 | int try_merge_command(const char *strategy, size_t xopts_nr, | |
1826 | const char **xopts, struct commit_list *common, | |
1827 | const char *head_arg, struct commit_list *remotes); | |
1828 | int checkout_fast_forward(const unsigned char *from, | |
1829 | const unsigned char *to, | |
1830 | int overwrite_ignore); | |
1831 | ||
1832 | ||
1833 | int sane_execvp(const char *file, char *const argv[]); | |
1834 | ||
1835 | /* | |
1836 | * A struct to encapsulate the concept of whether a file has changed | |
1837 | * since we last checked it. This uses criteria similar to those used | |
1838 | * for the index. | |
1839 | */ | |
1840 | struct stat_validity { | |
1841 | struct stat_data *sd; | |
1842 | }; | |
1843 | ||
1844 | void stat_validity_clear(struct stat_validity *sv); | |
1845 | ||
1846 | /* | |
1847 | * Returns 1 if the path is a regular file (or a symlink to a regular | |
1848 | * file) and matches the saved stat_validity, 0 otherwise. A missing | |
1849 | * or inaccessible file is considered a match if the struct was just | |
1850 | * initialized, or if the previous update found an inaccessible file. | |
1851 | */ | |
1852 | int stat_validity_check(struct stat_validity *sv, const char *path); | |
1853 | ||
1854 | /* | |
1855 | * Update the stat_validity from a file opened at descriptor fd. If | |
1856 | * the file is missing, inaccessible, or not a regular file, then | |
1857 | * future calls to stat_validity_check will match iff one of those | |
1858 | * conditions continues to be true. | |
1859 | */ | |
1860 | void stat_validity_update(struct stat_validity *sv, int fd); | |
1861 | ||
1862 | int versioncmp(const char *s1, const char *s2); | |
1863 | void sleep_millisec(int millisec); | |
1864 | ||
1865 | /* | |
1866 | * Create a directory and (if share is nonzero) adjust its permissions | |
1867 | * according to the shared_repository setting. Only use this for | |
1868 | * directories under $GIT_DIR. Don't use it for working tree | |
1869 | * directories. | |
1870 | */ | |
1871 | void safe_create_dir(const char *dir, int share); | |
1872 | ||
1873 | #endif /* CACHE_H */ |