i18n: add no-op _() and N_() wrappers
[thirdparty/git.git] / cache.h
1 #ifndef CACHE_H
2 #define CACHE_H
3
4 #include "git-compat-util.h"
5 #include "strbuf.h"
6 #include "hash.h"
7 #include "advice.h"
8 #include "gettext.h"
9
10 #include SHA1_HEADER
11 #ifndef git_SHA_CTX
12 #define git_SHA_CTX SHA_CTX
13 #define git_SHA1_Init SHA1_Init
14 #define git_SHA1_Update SHA1_Update
15 #define git_SHA1_Final SHA1_Final
16 #endif
17
18 #include <zlib.h>
19 #if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
20 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
21 #endif
22
23 void git_inflate_init(z_streamp strm);
24 void git_inflate_end(z_streamp strm);
25 int git_inflate(z_streamp strm, int flush);
26
27 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
28 #define DTYPE(de) ((de)->d_type)
29 #else
30 #undef DT_UNKNOWN
31 #undef DT_DIR
32 #undef DT_REG
33 #undef DT_LNK
34 #define DT_UNKNOWN 0
35 #define DT_DIR 1
36 #define DT_REG 2
37 #define DT_LNK 3
38 #define DTYPE(de) DT_UNKNOWN
39 #endif
40
41 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
42 #define S_IFINVALID 0030000
43
44 /*
45 * A "directory link" is a link to another git directory.
46 *
47 * The value 0160000 is not normally a valid mode, and
48 * also just happens to be S_IFDIR + S_IFLNK
49 *
50 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
51 * always having the same values everywhere. We should use
52 * our internal git values for these things, and then we can
53 * translate that to the OS-specific value. It just so
54 * happens that everybody shares the same bit representation
55 * in the UNIX world (and apparently wider too..)
56 */
57 #define S_IFGITLINK 0160000
58 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
59
60 /*
61 * Intensive research over the course of many years has shown that
62 * port 9418 is totally unused by anything else. Or
63 *
64 * Your search - "port 9418" - did not match any documents.
65 *
66 * as www.google.com puts it.
67 *
68 * This port has been properly assigned for git use by IANA:
69 * git (Assigned-9418) [I06-050728-0001].
70 *
71 * git 9418/tcp git pack transfer service
72 * git 9418/udp git pack transfer service
73 *
74 * with Linus Torvalds <torvalds@osdl.org> as the point of
75 * contact. September 2005.
76 *
77 * See http://www.iana.org/assignments/port-numbers
78 */
79 #define DEFAULT_GIT_PORT 9418
80
81 /*
82 * Basic data structures for the directory cache
83 */
84
85 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
86 struct cache_header {
87 unsigned int hdr_signature;
88 unsigned int hdr_version;
89 unsigned int hdr_entries;
90 };
91
92 /*
93 * The "cache_time" is just the low 32 bits of the
94 * time. It doesn't matter if it overflows - we only
95 * check it for equality in the 32 bits we save.
96 */
97 struct cache_time {
98 unsigned int sec;
99 unsigned int nsec;
100 };
101
102 /*
103 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
104 * Again - this is just a (very strong in practice) heuristic that
105 * the inode hasn't changed.
106 *
107 * We save the fields in big-endian order to allow using the
108 * index file over NFS transparently.
109 */
110 struct ondisk_cache_entry {
111 struct cache_time ctime;
112 struct cache_time mtime;
113 unsigned int dev;
114 unsigned int ino;
115 unsigned int mode;
116 unsigned int uid;
117 unsigned int gid;
118 unsigned int size;
119 unsigned char sha1[20];
120 unsigned short flags;
121 char name[FLEX_ARRAY]; /* more */
122 };
123
124 /*
125 * This struct is used when CE_EXTENDED bit is 1
126 * The struct must match ondisk_cache_entry exactly from
127 * ctime till flags
128 */
129 struct ondisk_cache_entry_extended {
130 struct cache_time ctime;
131 struct cache_time mtime;
132 unsigned int dev;
133 unsigned int ino;
134 unsigned int mode;
135 unsigned int uid;
136 unsigned int gid;
137 unsigned int size;
138 unsigned char sha1[20];
139 unsigned short flags;
140 unsigned short flags2;
141 char name[FLEX_ARRAY]; /* more */
142 };
143
144 struct cache_entry {
145 struct cache_time ce_ctime;
146 struct cache_time ce_mtime;
147 unsigned int ce_dev;
148 unsigned int ce_ino;
149 unsigned int ce_mode;
150 unsigned int ce_uid;
151 unsigned int ce_gid;
152 unsigned int ce_size;
153 unsigned int ce_flags;
154 unsigned char sha1[20];
155 struct cache_entry *next;
156 char name[FLEX_ARRAY]; /* more */
157 };
158
159 #define CE_NAMEMASK (0x0fff)
160 #define CE_STAGEMASK (0x3000)
161 #define CE_EXTENDED (0x4000)
162 #define CE_VALID (0x8000)
163 #define CE_STAGESHIFT 12
164
165 /*
166 * Range 0xFFFF0000 in ce_flags is divided into
167 * two parts: in-memory flags and on-disk ones.
168 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
169 * if you want to save a new flag, add it in
170 * CE_EXTENDED_FLAGS
171 *
172 * In-memory only flags
173 */
174 #define CE_UPDATE (1 << 16)
175 #define CE_REMOVE (1 << 17)
176 #define CE_UPTODATE (1 << 18)
177 #define CE_ADDED (1 << 19)
178
179 #define CE_HASHED (1 << 20)
180 #define CE_UNHASHED (1 << 21)
181 #define CE_WT_REMOVE (1 << 22) /* remove in work directory */
182 #define CE_CONFLICTED (1 << 23)
183
184 #define CE_UNPACKED (1 << 24)
185 #define CE_NEW_SKIP_WORKTREE (1 << 25)
186
187 /*
188 * Extended on-disk flags
189 */
190 #define CE_INTENT_TO_ADD (1 << 29)
191 #define CE_SKIP_WORKTREE (1 << 30)
192 /* CE_EXTENDED2 is for future extension */
193 #define CE_EXTENDED2 (1 << 31)
194
195 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
196
197 /*
198 * Safeguard to avoid saving wrong flags:
199 * - CE_EXTENDED2 won't get saved until its semantic is known
200 * - Bits in 0x0000FFFF have been saved in ce_flags already
201 * - Bits in 0x003F0000 are currently in-memory flags
202 */
203 #if CE_EXTENDED_FLAGS & 0x803FFFFF
204 #error "CE_EXTENDED_FLAGS out of range"
205 #endif
206
207 /*
208 * Copy the sha1 and stat state of a cache entry from one to
209 * another. But we never change the name, or the hash state!
210 */
211 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
212 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
213 {
214 unsigned int state = dst->ce_flags & CE_STATE_MASK;
215
216 /* Don't copy hash chain and name */
217 memcpy(dst, src, offsetof(struct cache_entry, next));
218
219 /* Restore the hash state */
220 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
221 }
222
223 static inline unsigned create_ce_flags(size_t len, unsigned stage)
224 {
225 if (len >= CE_NAMEMASK)
226 len = CE_NAMEMASK;
227 return (len | (stage << CE_STAGESHIFT));
228 }
229
230 static inline size_t ce_namelen(const struct cache_entry *ce)
231 {
232 size_t len = ce->ce_flags & CE_NAMEMASK;
233 if (len < CE_NAMEMASK)
234 return len;
235 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
236 }
237
238 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
239 #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
240 ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
241 ondisk_cache_entry_size(ce_namelen(ce)))
242 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
243 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
244 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
245 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
246
247 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
248 static inline unsigned int create_ce_mode(unsigned int mode)
249 {
250 if (S_ISLNK(mode))
251 return S_IFLNK;
252 if (S_ISDIR(mode) || S_ISGITLINK(mode))
253 return S_IFGITLINK;
254 return S_IFREG | ce_permissions(mode);
255 }
256 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
257 {
258 extern int trust_executable_bit, has_symlinks;
259 if (!has_symlinks && S_ISREG(mode) &&
260 ce && S_ISLNK(ce->ce_mode))
261 return ce->ce_mode;
262 if (!trust_executable_bit && S_ISREG(mode)) {
263 if (ce && S_ISREG(ce->ce_mode))
264 return ce->ce_mode;
265 return create_ce_mode(0666);
266 }
267 return create_ce_mode(mode);
268 }
269 static inline int ce_to_dtype(const struct cache_entry *ce)
270 {
271 unsigned ce_mode = ntohl(ce->ce_mode);
272 if (S_ISREG(ce_mode))
273 return DT_REG;
274 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
275 return DT_DIR;
276 else if (S_ISLNK(ce_mode))
277 return DT_LNK;
278 else
279 return DT_UNKNOWN;
280 }
281 static inline unsigned int canon_mode(unsigned int mode)
282 {
283 if (S_ISREG(mode))
284 return S_IFREG | ce_permissions(mode);
285 if (S_ISLNK(mode))
286 return S_IFLNK;
287 if (S_ISDIR(mode))
288 return S_IFDIR;
289 return S_IFGITLINK;
290 }
291
292 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
293 #define cache_entry_size(len) flexible_size(cache_entry,len)
294 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
295 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
296
297 struct index_state {
298 struct cache_entry **cache;
299 unsigned int cache_nr, cache_alloc, cache_changed;
300 struct string_list *resolve_undo;
301 struct cache_tree *cache_tree;
302 struct cache_time timestamp;
303 void *alloc;
304 unsigned name_hash_initialized : 1,
305 initialized : 1;
306 struct hash_table name_hash;
307 };
308
309 extern struct index_state the_index;
310
311 /* Name hashing */
312 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
313 /*
314 * We don't actually *remove* it, we can just mark it invalid so that
315 * we won't find it in lookups.
316 *
317 * Not only would we have to search the lists (simple enough), but
318 * we'd also have to rehash other hash buckets in case this makes the
319 * hash bucket empty (common). So it's much better to just mark
320 * it.
321 */
322 static inline void remove_name_hash(struct cache_entry *ce)
323 {
324 ce->ce_flags |= CE_UNHASHED;
325 }
326
327
328 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
329 #define active_cache (the_index.cache)
330 #define active_nr (the_index.cache_nr)
331 #define active_alloc (the_index.cache_alloc)
332 #define active_cache_changed (the_index.cache_changed)
333 #define active_cache_tree (the_index.cache_tree)
334
335 #define read_cache() read_index(&the_index)
336 #define read_cache_from(path) read_index_from(&the_index, (path))
337 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
338 #define is_cache_unborn() is_index_unborn(&the_index)
339 #define read_cache_unmerged() read_index_unmerged(&the_index)
340 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
341 #define discard_cache() discard_index(&the_index)
342 #define unmerged_cache() unmerged_index(&the_index)
343 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
344 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
345 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
346 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
347 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
348 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
349 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
350 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
351 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
352 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
353 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
354 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
355 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
356 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
357 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
358 #endif
359
360 enum object_type {
361 OBJ_BAD = -1,
362 OBJ_NONE = 0,
363 OBJ_COMMIT = 1,
364 OBJ_TREE = 2,
365 OBJ_BLOB = 3,
366 OBJ_TAG = 4,
367 /* 5 for future expansion */
368 OBJ_OFS_DELTA = 6,
369 OBJ_REF_DELTA = 7,
370 OBJ_ANY,
371 OBJ_MAX
372 };
373
374 static inline enum object_type object_type(unsigned int mode)
375 {
376 return S_ISDIR(mode) ? OBJ_TREE :
377 S_ISGITLINK(mode) ? OBJ_COMMIT :
378 OBJ_BLOB;
379 }
380
381 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
382 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
383 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
384 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
385 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
386 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
387 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
388 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
389 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
390 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
391 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
392 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
393 #define GITATTRIBUTES_FILE ".gitattributes"
394 #define INFOATTRIBUTES_FILE "info/attributes"
395 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
396 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
397 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
398 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
399 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
400 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
401
402 /*
403 * Repository-local GIT_* environment variables
404 * The array is NULL-terminated to simplify its usage in contexts such
405 * environment creation or simple walk of the list.
406 * The number of non-NULL entries is available as a macro.
407 */
408 #define LOCAL_REPO_ENV_SIZE 9
409 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
410
411 extern int is_bare_repository_cfg;
412 extern int is_bare_repository(void);
413 extern int is_inside_git_dir(void);
414 extern char *git_work_tree_cfg;
415 extern int is_inside_work_tree(void);
416 extern int have_git_dir(void);
417 extern const char *get_git_dir(void);
418 extern char *get_object_directory(void);
419 extern char *get_index_file(void);
420 extern char *get_graft_file(void);
421 extern int set_git_dir(const char *path);
422 extern const char *get_git_work_tree(void);
423 extern const char *read_gitfile_gently(const char *path);
424 extern void set_git_work_tree(const char *tree);
425
426 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
427
428 extern const char **get_pathspec(const char *prefix, const char **pathspec);
429 extern void setup_work_tree(void);
430 extern const char *setup_git_directory_gently(int *);
431 extern const char *setup_git_directory(void);
432 extern char *prefix_path(const char *prefix, int len, const char *path);
433 extern const char *prefix_filename(const char *prefix, int len, const char *path);
434 extern int check_filename(const char *prefix, const char *name);
435 extern void verify_filename(const char *prefix, const char *name);
436 extern void verify_non_filename(const char *prefix, const char *name);
437
438 #define INIT_DB_QUIET 0x0001
439
440 extern int init_db(const char *template_dir, unsigned int flags);
441
442 #define alloc_nr(x) (((x)+16)*3/2)
443
444 /*
445 * Realloc the buffer pointed at by variable 'x' so that it can hold
446 * at least 'nr' entries; the number of entries currently allocated
447 * is 'alloc', using the standard growing factor alloc_nr() macro.
448 *
449 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
450 */
451 #define ALLOC_GROW(x, nr, alloc) \
452 do { \
453 if ((nr) > alloc) { \
454 if (alloc_nr(alloc) < (nr)) \
455 alloc = (nr); \
456 else \
457 alloc = alloc_nr(alloc); \
458 x = xrealloc((x), alloc * sizeof(*(x))); \
459 } \
460 } while (0)
461
462 /* Initialize and use the cache information */
463 extern int read_index(struct index_state *);
464 extern int read_index_preload(struct index_state *, const char **pathspec);
465 extern int read_index_from(struct index_state *, const char *path);
466 extern int is_index_unborn(struct index_state *);
467 extern int read_index_unmerged(struct index_state *);
468 extern int write_index(struct index_state *, int newfd);
469 extern int discard_index(struct index_state *);
470 extern int unmerged_index(const struct index_state *);
471 extern int verify_path(const char *path);
472 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
473 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
474 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
475 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
476 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
477 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
478 #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
479 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
480 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
481 extern int remove_index_entry_at(struct index_state *, int pos);
482 extern void remove_marked_cache_entries(struct index_state *istate);
483 extern int remove_file_from_index(struct index_state *, const char *path);
484 #define ADD_CACHE_VERBOSE 1
485 #define ADD_CACHE_PRETEND 2
486 #define ADD_CACHE_IGNORE_ERRORS 4
487 #define ADD_CACHE_IGNORE_REMOVAL 8
488 #define ADD_CACHE_INTENT 16
489 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
490 extern int add_file_to_index(struct index_state *, const char *path, int flags);
491 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
492 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
493 extern int index_name_is_other(const struct index_state *, const char *, int);
494
495 /* do stat comparison even if CE_VALID is true */
496 #define CE_MATCH_IGNORE_VALID 01
497 /* do not check the contents but report dirty on racily-clean entries */
498 #define CE_MATCH_RACY_IS_DIRTY 02
499 /* do stat comparison even if CE_SKIP_WORKTREE is true */
500 #define CE_MATCH_IGNORE_SKIP_WORKTREE 04
501 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
502 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
503
504 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
505 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
506 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
507 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
508
509 #define REFRESH_REALLY 0x0001 /* ignore_valid */
510 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
511 #define REFRESH_QUIET 0x0004 /* be quiet about it */
512 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
513 #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
514 #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
515 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
516
517 struct lock_file {
518 struct lock_file *next;
519 int fd;
520 pid_t owner;
521 char on_list;
522 char filename[PATH_MAX];
523 };
524 #define LOCK_DIE_ON_ERROR 1
525 #define LOCK_NODEREF 2
526 extern int unable_to_lock_error(const char *path, int err);
527 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
528 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
529 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
530 extern int commit_lock_file(struct lock_file *);
531
532 extern int hold_locked_index(struct lock_file *, int);
533 extern int commit_locked_index(struct lock_file *);
534 extern void set_alternate_index_output(const char *);
535 extern int close_lock_file(struct lock_file *);
536 extern void rollback_lock_file(struct lock_file *);
537 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
538
539 /* Environment bits from configuration mechanism */
540 extern int trust_executable_bit;
541 extern int trust_ctime;
542 extern int quote_path_fully;
543 extern int has_symlinks;
544 extern int ignore_case;
545 extern int assume_unchanged;
546 extern int prefer_symlink_refs;
547 extern int log_all_ref_updates;
548 extern int warn_ambiguous_refs;
549 extern int unique_abbrev_extra_length;
550 extern int shared_repository;
551 extern const char *apply_default_whitespace;
552 extern const char *apply_default_ignorewhitespace;
553 extern int zlib_compression_level;
554 extern int core_compression_level;
555 extern int core_compression_seen;
556 extern size_t packed_git_window_size;
557 extern size_t packed_git_limit;
558 extern size_t delta_base_cache_limit;
559 extern int read_replace_refs;
560 extern int fsync_object_files;
561 extern int core_preload_index;
562 extern int core_apply_sparse_checkout;
563
564 enum safe_crlf {
565 SAFE_CRLF_FALSE = 0,
566 SAFE_CRLF_FAIL = 1,
567 SAFE_CRLF_WARN = 2
568 };
569
570 extern enum safe_crlf safe_crlf;
571
572 enum auto_crlf {
573 AUTO_CRLF_FALSE = 0,
574 AUTO_CRLF_TRUE = 1,
575 AUTO_CRLF_INPUT = -1,
576 };
577
578 extern enum auto_crlf auto_crlf;
579
580 enum eol {
581 EOL_UNSET,
582 EOL_CRLF,
583 EOL_LF,
584 #ifdef NATIVE_CRLF
585 EOL_NATIVE = EOL_CRLF
586 #else
587 EOL_NATIVE = EOL_LF
588 #endif
589 };
590
591 extern enum eol eol;
592
593 enum branch_track {
594 BRANCH_TRACK_UNSPECIFIED = -1,
595 BRANCH_TRACK_NEVER = 0,
596 BRANCH_TRACK_REMOTE,
597 BRANCH_TRACK_ALWAYS,
598 BRANCH_TRACK_EXPLICIT,
599 BRANCH_TRACK_OVERRIDE
600 };
601
602 enum rebase_setup_type {
603 AUTOREBASE_NEVER = 0,
604 AUTOREBASE_LOCAL,
605 AUTOREBASE_REMOTE,
606 AUTOREBASE_ALWAYS
607 };
608
609 enum push_default_type {
610 PUSH_DEFAULT_NOTHING = 0,
611 PUSH_DEFAULT_MATCHING,
612 PUSH_DEFAULT_TRACKING,
613 PUSH_DEFAULT_CURRENT
614 };
615
616 extern enum branch_track git_branch_track;
617 extern enum rebase_setup_type autorebase;
618 extern enum push_default_type push_default;
619
620 enum object_creation_mode {
621 OBJECT_CREATION_USES_HARDLINKS = 0,
622 OBJECT_CREATION_USES_RENAMES = 1
623 };
624
625 extern enum object_creation_mode object_creation_mode;
626
627 extern char *notes_ref_name;
628
629 extern int grafts_replace_parents;
630
631 #define GIT_REPO_VERSION 0
632 extern int repository_format_version;
633 extern int check_repository_format(void);
634
635 #define MTIME_CHANGED 0x0001
636 #define CTIME_CHANGED 0x0002
637 #define OWNER_CHANGED 0x0004
638 #define MODE_CHANGED 0x0008
639 #define INODE_CHANGED 0x0010
640 #define DATA_CHANGED 0x0020
641 #define TYPE_CHANGED 0x0040
642
643 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
644 __attribute__((format (printf, 3, 4)));
645 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
646 __attribute__((format (printf, 3, 4)));
647 extern char *git_pathdup(const char *fmt, ...)
648 __attribute__((format (printf, 1, 2)));
649
650 /* Return a statically allocated filename matching the sha1 signature */
651 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
652 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
653 extern char *git_path_submodule(const char *path, const char *fmt, ...)
654 __attribute__((format (printf, 2, 3)));
655
656 extern char *sha1_file_name(const unsigned char *sha1);
657 extern char *sha1_pack_name(const unsigned char *sha1);
658 extern char *sha1_pack_index_name(const unsigned char *sha1);
659 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
660 extern const unsigned char null_sha1[20];
661 static inline int is_null_sha1(const unsigned char *sha1)
662 {
663 return !memcmp(sha1, null_sha1, 20);
664 }
665 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
666 {
667 return memcmp(sha1, sha2, 20);
668 }
669 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
670 {
671 memcpy(sha_dst, sha_src, 20);
672 }
673 static inline void hashclr(unsigned char *hash)
674 {
675 memset(hash, 0, 20);
676 }
677
678 #define EMPTY_TREE_SHA1_HEX \
679 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
680 #define EMPTY_TREE_SHA1_BIN_LITERAL \
681 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
682 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
683 #define EMPTY_TREE_SHA1_BIN \
684 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
685
686 int git_mkstemp(char *path, size_t n, const char *template);
687
688 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
689
690 /* set default permissions by passing mode arguments to open(2) */
691 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
692 int git_mkstemp_mode(char *pattern, int mode);
693
694 /*
695 * NOTE NOTE NOTE!!
696 *
697 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
698 * not be changed. Old repositories have core.sharedrepository written in
699 * numeric format, and therefore these values are preserved for compatibility
700 * reasons.
701 */
702 enum sharedrepo {
703 PERM_UMASK = 0,
704 OLD_PERM_GROUP = 1,
705 OLD_PERM_EVERYBODY = 2,
706 PERM_GROUP = 0660,
707 PERM_EVERYBODY = 0664
708 };
709 int git_config_perm(const char *var, const char *value);
710 int set_shared_perm(const char *path, int mode);
711 #define adjust_shared_perm(path) set_shared_perm((path), 0)
712 int safe_create_leading_directories(char *path);
713 int safe_create_leading_directories_const(const char *path);
714 extern char *expand_user_path(const char *path);
715 char *enter_repo(char *path, int strict);
716 static inline int is_absolute_path(const char *path)
717 {
718 return path[0] == '/' || has_dos_drive_prefix(path);
719 }
720 int is_directory(const char *);
721 const char *make_absolute_path(const char *path);
722 const char *make_nonrelative_path(const char *path);
723 const char *make_relative_path(const char *abs, const char *base);
724 int normalize_path_copy(char *dst, const char *src);
725 int longest_ancestor_length(const char *path, const char *prefix_list);
726 char *strip_path_suffix(const char *path, const char *suffix);
727 int daemon_avoid_alias(const char *path);
728 int offset_1st_component(const char *path);
729
730 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
731 extern int sha1_object_info(const unsigned char *, unsigned long *);
732 extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
733 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
734 {
735 return read_sha1_file_repl(sha1, type, size, NULL);
736 }
737 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
738 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
739 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
740 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
741
742 /* global flag to enable extra checks when accessing packed objects */
743 extern int do_check_packed_object_crc;
744
745 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
746
747 extern int move_temp_to_file(const char *tmpfile, const char *filename);
748
749 extern int has_sha1_pack(const unsigned char *sha1);
750 extern int has_sha1_file(const unsigned char *sha1);
751 extern int has_loose_object_nonlocal(const unsigned char *sha1);
752
753 extern int has_pack_index(const unsigned char *sha1);
754
755 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
756
757 extern const signed char hexval_table[256];
758 static inline unsigned int hexval(unsigned char c)
759 {
760 return hexval_table[c];
761 }
762
763 /* Convert to/from hex/sha1 representation */
764 #define MINIMUM_ABBREV 4
765 #define DEFAULT_ABBREV 7
766
767 struct object_context {
768 unsigned char tree[20];
769 char path[PATH_MAX];
770 unsigned mode;
771 };
772
773 extern int get_sha1(const char *str, unsigned char *sha1);
774 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
775 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
776 {
777 return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
778 }
779 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
780 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
781 {
782 return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
783 }
784 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
785 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
786 extern int read_ref(const char *filename, unsigned char *sha1);
787 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
788 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
789 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
790 extern int interpret_branch_name(const char *str, struct strbuf *);
791 extern int get_sha1_mb(const char *str, unsigned char *sha1);
792
793 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
794 extern const char *ref_rev_parse_rules[];
795 extern const char *ref_fetch_rules[];
796
797 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
798 extern int validate_headref(const char *ref);
799
800 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
801 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
802 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
803
804 extern void *read_object_with_reference(const unsigned char *sha1,
805 const char *required_type,
806 unsigned long *size,
807 unsigned char *sha1_ret);
808
809 extern struct object *peel_to_type(const char *name, int namelen,
810 struct object *o, enum object_type);
811
812 enum date_mode {
813 DATE_NORMAL = 0,
814 DATE_RELATIVE,
815 DATE_SHORT,
816 DATE_LOCAL,
817 DATE_ISO8601,
818 DATE_RFC2822,
819 DATE_RAW
820 };
821
822 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
823 const char *show_date_relative(unsigned long time, int tz,
824 const struct timeval *now,
825 char *timebuf,
826 size_t timebuf_size);
827 int parse_date(const char *date, char *buf, int bufsize);
828 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
829 void datestamp(char *buf, int bufsize);
830 #define approxidate(s) approxidate_careful((s), NULL)
831 unsigned long approxidate_careful(const char *, int *);
832 unsigned long approxidate_relative(const char *date, const struct timeval *now);
833 enum date_mode parse_date_format(const char *format);
834
835 #define IDENT_WARN_ON_NO_NAME 1
836 #define IDENT_ERROR_ON_NO_NAME 2
837 #define IDENT_NO_DATE 4
838 extern const char *git_author_info(int);
839 extern const char *git_committer_info(int);
840 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
841 extern const char *fmt_name(const char *name, const char *email);
842 extern const char *git_editor(void);
843 extern const char *git_pager(int stdout_is_tty);
844
845 struct checkout {
846 const char *base_dir;
847 int base_dir_len;
848 unsigned force:1,
849 quiet:1,
850 not_new:1,
851 refresh_cache:1;
852 };
853
854 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
855
856 struct cache_def {
857 char path[PATH_MAX + 1];
858 int len;
859 int flags;
860 int track_flags;
861 int prefix_len_stat_func;
862 };
863
864 extern int has_symlink_leading_path(const char *name, int len);
865 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
866 extern int check_leading_path(const char *name, int len);
867 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
868 extern void schedule_dir_for_removal(const char *name, int len);
869 extern void remove_scheduled_dirs(void);
870
871 extern struct alternate_object_database {
872 struct alternate_object_database *next;
873 char *name;
874 char base[FLEX_ARRAY]; /* more */
875 } *alt_odb_list;
876 extern void prepare_alt_odb(void);
877 extern void add_to_alternates_file(const char *reference);
878 typedef int alt_odb_fn(struct alternate_object_database *, void *);
879 extern void foreach_alt_odb(alt_odb_fn, void*);
880
881 struct pack_window {
882 struct pack_window *next;
883 unsigned char *base;
884 off_t offset;
885 size_t len;
886 unsigned int last_used;
887 unsigned int inuse_cnt;
888 };
889
890 extern struct packed_git {
891 struct packed_git *next;
892 struct pack_window *windows;
893 off_t pack_size;
894 const void *index_data;
895 size_t index_size;
896 uint32_t num_objects;
897 uint32_t num_bad_objects;
898 unsigned char *bad_object_sha1;
899 int index_version;
900 time_t mtime;
901 int pack_fd;
902 unsigned pack_local:1,
903 pack_keep:1;
904 unsigned char sha1[20];
905 /* something like ".git/objects/pack/xxxxx.pack" */
906 char pack_name[FLEX_ARRAY]; /* more */
907 } *packed_git;
908
909 struct pack_entry {
910 off_t offset;
911 unsigned char sha1[20];
912 struct packed_git *p;
913 };
914
915 struct ref {
916 struct ref *next;
917 unsigned char old_sha1[20];
918 unsigned char new_sha1[20];
919 char *symref;
920 unsigned int force:1,
921 merge:1,
922 nonfastforward:1,
923 deletion:1;
924 enum {
925 REF_STATUS_NONE = 0,
926 REF_STATUS_OK,
927 REF_STATUS_REJECT_NONFASTFORWARD,
928 REF_STATUS_REJECT_NODELETE,
929 REF_STATUS_UPTODATE,
930 REF_STATUS_REMOTE_REJECT,
931 REF_STATUS_EXPECTING_REPORT
932 } status;
933 char *remote_status;
934 struct ref *peer_ref; /* when renaming */
935 char name[FLEX_ARRAY]; /* more */
936 };
937
938 #define REF_NORMAL (1u << 0)
939 #define REF_HEADS (1u << 1)
940 #define REF_TAGS (1u << 2)
941
942 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
943
944 #define CONNECT_VERBOSE (1u << 0)
945 extern char *git_getpass(const char *prompt);
946 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
947 extern int finish_connect(struct child_process *conn);
948 extern int path_match(const char *path, int nr, char **match);
949 struct extra_have_objects {
950 int nr, alloc;
951 unsigned char (*array)[20];
952 };
953 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
954 extern int server_supports(const char *feature);
955
956 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
957
958 extern void prepare_packed_git(void);
959 extern void reprepare_packed_git(void);
960 extern void install_packed_git(struct packed_git *pack);
961
962 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
963 struct packed_git *packs);
964
965 extern void pack_report(void);
966 extern int open_pack_index(struct packed_git *);
967 extern void close_pack_index(struct packed_git *);
968 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
969 extern void close_pack_windows(struct packed_git *);
970 extern void unuse_pack(struct pack_window **);
971 extern void free_pack_by_name(const char *);
972 extern void clear_delta_base_cache(void);
973 extern struct packed_git *add_packed_git(const char *, int, int);
974 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
975 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
976 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
977 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
978 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
979 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
980 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
981
982 /* Dumb servers support */
983 extern int update_server_info(int);
984
985 typedef int (*config_fn_t)(const char *, const char *, void *);
986 extern int git_default_config(const char *, const char *, void *);
987 extern int git_config_from_file(config_fn_t fn, const char *, void *);
988 extern void git_config_push_parameter(const char *text);
989 extern int git_config_parse_parameter(const char *text);
990 extern int git_config_parse_environment(void);
991 extern int git_config_from_parameters(config_fn_t fn, void *data);
992 extern int git_config(config_fn_t fn, void *);
993 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
994 extern int git_parse_ulong(const char *, unsigned long *);
995 extern int git_config_int(const char *, const char *);
996 extern unsigned long git_config_ulong(const char *, const char *);
997 extern int git_config_bool_or_int(const char *, const char *, int *);
998 extern int git_config_bool(const char *, const char *);
999 extern int git_config_maybe_bool(const char *, const char *);
1000 extern int git_config_string(const char **, const char *, const char *);
1001 extern int git_config_pathname(const char **, const char *, const char *);
1002 extern int git_config_set(const char *, const char *);
1003 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1004 extern int git_config_rename_section(const char *, const char *);
1005 extern const char *git_etc_gitconfig(void);
1006 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1007 extern int git_env_bool(const char *, int);
1008 extern int git_config_system(void);
1009 extern int git_config_global(void);
1010 extern int config_error_nonbool(const char *);
1011 extern const char *get_log_output_encoding(void);
1012 extern const char *get_commit_output_encoding(void);
1013
1014 extern const char *config_exclusive_filename;
1015
1016 #define MAX_GITNAME (1000)
1017 extern char git_default_email[MAX_GITNAME];
1018 extern char git_default_name[MAX_GITNAME];
1019 #define IDENT_NAME_GIVEN 01
1020 #define IDENT_MAIL_GIVEN 02
1021 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1022 extern int user_ident_explicitly_given;
1023 extern int user_ident_sufficiently_given(void);
1024
1025 extern const char *git_commit_encoding;
1026 extern const char *git_log_output_encoding;
1027 extern const char *git_mailmap_file;
1028
1029 /* IO helper functions */
1030 extern void maybe_flush_or_die(FILE *, const char *);
1031 extern int copy_fd(int ifd, int ofd);
1032 extern int copy_file(const char *dst, const char *src, int mode);
1033 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1034 extern void write_or_die(int fd, const void *buf, size_t count);
1035 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1036 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1037 extern void fsync_or_die(int fd, const char *);
1038
1039 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1040 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1041 static inline ssize_t write_str_in_full(int fd, const char *str)
1042 {
1043 return write_in_full(fd, str, strlen(str));
1044 }
1045
1046 /* pager.c */
1047 extern void setup_pager(void);
1048 extern const char *pager_program;
1049 extern int pager_in_use(void);
1050 extern int pager_use_color;
1051
1052 extern const char *editor_program;
1053 extern const char *askpass_program;
1054 extern const char *excludes_file;
1055
1056 /* base85 */
1057 int decode_85(char *dst, const char *line, int linelen);
1058 void encode_85(char *buf, const unsigned char *data, int bytes);
1059
1060 /* alloc.c */
1061 extern void *alloc_blob_node(void);
1062 extern void *alloc_tree_node(void);
1063 extern void *alloc_commit_node(void);
1064 extern void *alloc_tag_node(void);
1065 extern void *alloc_object_node(void);
1066 extern void alloc_report(void);
1067
1068 /* trace.c */
1069 __attribute__((format (printf, 1, 2)))
1070 extern void trace_printf(const char *format, ...);
1071 __attribute__((format (printf, 2, 3)))
1072 extern void trace_argv_printf(const char **argv, const char *format, ...);
1073 extern void trace_repo_setup(const char *prefix);
1074
1075 /* convert.c */
1076 /* returns 1 if *dst was used */
1077 extern int convert_to_git(const char *path, const char *src, size_t len,
1078 struct strbuf *dst, enum safe_crlf checksafe);
1079 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1080 extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst);
1081
1082 /* add */
1083 /*
1084 * return 0 if success, 1 - if addition of a file failed and
1085 * ADD_FILES_IGNORE_ERRORS was specified in flags
1086 */
1087 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1088
1089 /* diff.c */
1090 extern int diff_auto_refresh_index;
1091
1092 /* match-trees.c */
1093 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1094 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1095
1096 /*
1097 * whitespace rules.
1098 * used by both diff and apply
1099 * last two digits are tab width
1100 */
1101 #define WS_BLANK_AT_EOL 0100
1102 #define WS_SPACE_BEFORE_TAB 0200
1103 #define WS_INDENT_WITH_NON_TAB 0400
1104 #define WS_CR_AT_EOL 01000
1105 #define WS_BLANK_AT_EOF 02000
1106 #define WS_TAB_IN_INDENT 04000
1107 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1108 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1109 #define WS_TAB_WIDTH_MASK 077
1110 extern unsigned whitespace_rule_cfg;
1111 extern unsigned whitespace_rule(const char *);
1112 extern unsigned parse_whitespace_rule(const char *);
1113 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1114 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1115 extern char *whitespace_error_string(unsigned ws);
1116 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1117 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1118 #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1119
1120 /* ls-files */
1121 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1122 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1123
1124 char *alias_lookup(const char *alias);
1125 int split_cmdline(char *cmdline, const char ***argv);
1126 /* Takes a negative value returned by split_cmdline */
1127 const char *split_cmdline_strerror(int cmdline_errno);
1128
1129 /* git.c */
1130 struct startup_info {
1131 int have_repository;
1132 const char *prefix;
1133 };
1134 extern struct startup_info *startup_info;
1135
1136 /* builtin/merge.c */
1137 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1138
1139 #endif /* CACHE_H */