Merge branch 'maint-1.7.3' into maint
[git/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 #include "convert.h"
10
11 #include SHA1_HEADER
12 #ifndef git_SHA_CTX
13 #define git_SHA_CTX SHA_CTX
14 #define git_SHA1_Init SHA1_Init
15 #define git_SHA1_Update SHA1_Update
16 #define git_SHA1_Final SHA1_Final
17 #endif
18
19 #include <zlib.h>
20 typedef struct git_zstream {
21 z_stream z;
22 unsigned long avail_in;
23 unsigned long avail_out;
24 unsigned long total_in;
25 unsigned long total_out;
26 unsigned char *next_in;
27 unsigned char *next_out;
28 } git_zstream;
29
30 void git_inflate_init(git_zstream *);
31 void git_inflate_init_gzip_only(git_zstream *);
32 void git_inflate_end(git_zstream *);
33 int git_inflate(git_zstream *, int flush);
34
35 void git_deflate_init(git_zstream *, int level);
36 void git_deflate_init_gzip(git_zstream *, int level);
37 void git_deflate_end(git_zstream *);
38 int git_deflate_end_gently(git_zstream *);
39 int git_deflate(git_zstream *, int flush);
40 unsigned long git_deflate_bound(git_zstream *, unsigned long);
41
42 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
43 #define DTYPE(de) ((de)->d_type)
44 #else
45 #undef DT_UNKNOWN
46 #undef DT_DIR
47 #undef DT_REG
48 #undef DT_LNK
49 #define DT_UNKNOWN 0
50 #define DT_DIR 1
51 #define DT_REG 2
52 #define DT_LNK 3
53 #define DTYPE(de) DT_UNKNOWN
54 #endif
55
56 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
57 #define S_IFINVALID 0030000
58
59 /*
60 * A "directory link" is a link to another git directory.
61 *
62 * The value 0160000 is not normally a valid mode, and
63 * also just happens to be S_IFDIR + S_IFLNK
64 *
65 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
66 * always having the same values everywhere. We should use
67 * our internal git values for these things, and then we can
68 * translate that to the OS-specific value. It just so
69 * happens that everybody shares the same bit representation
70 * in the UNIX world (and apparently wider too..)
71 */
72 #define S_IFGITLINK 0160000
73 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
74
75 /*
76 * Intensive research over the course of many years has shown that
77 * port 9418 is totally unused by anything else. Or
78 *
79 * Your search - "port 9418" - did not match any documents.
80 *
81 * as www.google.com puts it.
82 *
83 * This port has been properly assigned for git use by IANA:
84 * git (Assigned-9418) [I06-050728-0001].
85 *
86 * git 9418/tcp git pack transfer service
87 * git 9418/udp git pack transfer service
88 *
89 * with Linus Torvalds <torvalds@osdl.org> as the point of
90 * contact. September 2005.
91 *
92 * See http://www.iana.org/assignments/port-numbers
93 */
94 #define DEFAULT_GIT_PORT 9418
95
96 /*
97 * Basic data structures for the directory cache
98 */
99
100 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
101 struct cache_header {
102 unsigned int hdr_signature;
103 unsigned int hdr_version;
104 unsigned int hdr_entries;
105 };
106
107 /*
108 * The "cache_time" is just the low 32 bits of the
109 * time. It doesn't matter if it overflows - we only
110 * check it for equality in the 32 bits we save.
111 */
112 struct cache_time {
113 unsigned int sec;
114 unsigned int nsec;
115 };
116
117 /*
118 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
119 * Again - this is just a (very strong in practice) heuristic that
120 * the inode hasn't changed.
121 *
122 * We save the fields in big-endian order to allow using the
123 * index file over NFS transparently.
124 */
125 struct ondisk_cache_entry {
126 struct cache_time ctime;
127 struct cache_time mtime;
128 unsigned int dev;
129 unsigned int ino;
130 unsigned int mode;
131 unsigned int uid;
132 unsigned int gid;
133 unsigned int size;
134 unsigned char sha1[20];
135 unsigned short flags;
136 char name[FLEX_ARRAY]; /* more */
137 };
138
139 /*
140 * This struct is used when CE_EXTENDED bit is 1
141 * The struct must match ondisk_cache_entry exactly from
142 * ctime till flags
143 */
144 struct ondisk_cache_entry_extended {
145 struct cache_time ctime;
146 struct cache_time mtime;
147 unsigned int dev;
148 unsigned int ino;
149 unsigned int mode;
150 unsigned int uid;
151 unsigned int gid;
152 unsigned int size;
153 unsigned char sha1[20];
154 unsigned short flags;
155 unsigned short flags2;
156 char name[FLEX_ARRAY]; /* more */
157 };
158
159 struct cache_entry {
160 struct cache_time ce_ctime;
161 struct cache_time ce_mtime;
162 unsigned int ce_dev;
163 unsigned int ce_ino;
164 unsigned int ce_mode;
165 unsigned int ce_uid;
166 unsigned int ce_gid;
167 unsigned int ce_size;
168 unsigned int ce_flags;
169 unsigned char sha1[20];
170 struct cache_entry *next;
171 char name[FLEX_ARRAY]; /* more */
172 };
173
174 #define CE_NAMEMASK (0x0fff)
175 #define CE_STAGEMASK (0x3000)
176 #define CE_EXTENDED (0x4000)
177 #define CE_VALID (0x8000)
178 #define CE_STAGESHIFT 12
179
180 /*
181 * Range 0xFFFF0000 in ce_flags is divided into
182 * two parts: in-memory flags and on-disk ones.
183 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
184 * if you want to save a new flag, add it in
185 * CE_EXTENDED_FLAGS
186 *
187 * In-memory only flags
188 */
189 #define CE_UPDATE (1 << 16)
190 #define CE_REMOVE (1 << 17)
191 #define CE_UPTODATE (1 << 18)
192 #define CE_ADDED (1 << 19)
193
194 #define CE_HASHED (1 << 20)
195 #define CE_UNHASHED (1 << 21)
196 #define CE_WT_REMOVE (1 << 22) /* remove in work directory */
197 #define CE_CONFLICTED (1 << 23)
198
199 #define CE_UNPACKED (1 << 24)
200 #define CE_NEW_SKIP_WORKTREE (1 << 25)
201
202 /*
203 * Extended on-disk flags
204 */
205 #define CE_INTENT_TO_ADD (1 << 29)
206 #define CE_SKIP_WORKTREE (1 << 30)
207 /* CE_EXTENDED2 is for future extension */
208 #define CE_EXTENDED2 (1 << 31)
209
210 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
211
212 /*
213 * Safeguard to avoid saving wrong flags:
214 * - CE_EXTENDED2 won't get saved until its semantic is known
215 * - Bits in 0x0000FFFF have been saved in ce_flags already
216 * - Bits in 0x003F0000 are currently in-memory flags
217 */
218 #if CE_EXTENDED_FLAGS & 0x803FFFFF
219 #error "CE_EXTENDED_FLAGS out of range"
220 #endif
221
222 /*
223 * Copy the sha1 and stat state of a cache entry from one to
224 * another. But we never change the name, or the hash state!
225 */
226 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
227 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
228 {
229 unsigned int state = dst->ce_flags & CE_STATE_MASK;
230
231 /* Don't copy hash chain and name */
232 memcpy(dst, src, offsetof(struct cache_entry, next));
233
234 /* Restore the hash state */
235 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
236 }
237
238 static inline unsigned create_ce_flags(size_t len, unsigned stage)
239 {
240 if (len >= CE_NAMEMASK)
241 len = CE_NAMEMASK;
242 return (len | (stage << CE_STAGESHIFT));
243 }
244
245 static inline size_t ce_namelen(const struct cache_entry *ce)
246 {
247 size_t len = ce->ce_flags & CE_NAMEMASK;
248 if (len < CE_NAMEMASK)
249 return len;
250 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
251 }
252
253 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
254 #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
255 ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
256 ondisk_cache_entry_size(ce_namelen(ce)))
257 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
258 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
259 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
260 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
261
262 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
263 static inline unsigned int create_ce_mode(unsigned int mode)
264 {
265 if (S_ISLNK(mode))
266 return S_IFLNK;
267 if (S_ISDIR(mode) || S_ISGITLINK(mode))
268 return S_IFGITLINK;
269 return S_IFREG | ce_permissions(mode);
270 }
271 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
272 {
273 extern int trust_executable_bit, has_symlinks;
274 if (!has_symlinks && S_ISREG(mode) &&
275 ce && S_ISLNK(ce->ce_mode))
276 return ce->ce_mode;
277 if (!trust_executable_bit && S_ISREG(mode)) {
278 if (ce && S_ISREG(ce->ce_mode))
279 return ce->ce_mode;
280 return create_ce_mode(0666);
281 }
282 return create_ce_mode(mode);
283 }
284 static inline int ce_to_dtype(const struct cache_entry *ce)
285 {
286 unsigned ce_mode = ntohl(ce->ce_mode);
287 if (S_ISREG(ce_mode))
288 return DT_REG;
289 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
290 return DT_DIR;
291 else if (S_ISLNK(ce_mode))
292 return DT_LNK;
293 else
294 return DT_UNKNOWN;
295 }
296 static inline unsigned int canon_mode(unsigned int mode)
297 {
298 if (S_ISREG(mode))
299 return S_IFREG | ce_permissions(mode);
300 if (S_ISLNK(mode))
301 return S_IFLNK;
302 if (S_ISDIR(mode))
303 return S_IFDIR;
304 return S_IFGITLINK;
305 }
306
307 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
308 #define cache_entry_size(len) flexible_size(cache_entry,len)
309 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
310 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
311
312 struct index_state {
313 struct cache_entry **cache;
314 unsigned int cache_nr, cache_alloc, cache_changed;
315 struct string_list *resolve_undo;
316 struct cache_tree *cache_tree;
317 struct cache_time timestamp;
318 void *alloc;
319 unsigned name_hash_initialized : 1,
320 initialized : 1;
321 struct hash_table name_hash;
322 };
323
324 extern struct index_state the_index;
325
326 /* Name hashing */
327 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
328 /*
329 * We don't actually *remove* it, we can just mark it invalid so that
330 * we won't find it in lookups.
331 *
332 * Not only would we have to search the lists (simple enough), but
333 * we'd also have to rehash other hash buckets in case this makes the
334 * hash bucket empty (common). So it's much better to just mark
335 * it.
336 */
337 static inline void remove_name_hash(struct cache_entry *ce)
338 {
339 ce->ce_flags |= CE_UNHASHED;
340 }
341
342
343 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
344 #define active_cache (the_index.cache)
345 #define active_nr (the_index.cache_nr)
346 #define active_alloc (the_index.cache_alloc)
347 #define active_cache_changed (the_index.cache_changed)
348 #define active_cache_tree (the_index.cache_tree)
349
350 #define read_cache() read_index(&the_index)
351 #define read_cache_from(path) read_index_from(&the_index, (path))
352 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
353 #define is_cache_unborn() is_index_unborn(&the_index)
354 #define read_cache_unmerged() read_index_unmerged(&the_index)
355 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
356 #define discard_cache() discard_index(&the_index)
357 #define unmerged_cache() unmerged_index(&the_index)
358 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
359 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
360 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
361 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
362 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
363 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
364 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
365 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
366 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
367 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
368 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
369 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
370 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
371 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
372 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
373 #endif
374
375 enum object_type {
376 OBJ_BAD = -1,
377 OBJ_NONE = 0,
378 OBJ_COMMIT = 1,
379 OBJ_TREE = 2,
380 OBJ_BLOB = 3,
381 OBJ_TAG = 4,
382 /* 5 for future expansion */
383 OBJ_OFS_DELTA = 6,
384 OBJ_REF_DELTA = 7,
385 OBJ_ANY,
386 OBJ_MAX
387 };
388
389 static inline enum object_type object_type(unsigned int mode)
390 {
391 return S_ISDIR(mode) ? OBJ_TREE :
392 S_ISGITLINK(mode) ? OBJ_COMMIT :
393 OBJ_BLOB;
394 }
395
396 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
397 #define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
398 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
399 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
400 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
401 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
402 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
403 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
404 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
405 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
406 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
407 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
408 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
409 #define GITATTRIBUTES_FILE ".gitattributes"
410 #define INFOATTRIBUTES_FILE "info/attributes"
411 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
412 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
413 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
414 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
415 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
416 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
417
418 /*
419 * Repository-local GIT_* environment variables
420 * The array is NULL-terminated to simplify its usage in contexts such
421 * environment creation or simple walk of the list.
422 * The number of non-NULL entries is available as a macro.
423 */
424 #define LOCAL_REPO_ENV_SIZE 9
425 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
426
427 extern int is_bare_repository_cfg;
428 extern int is_bare_repository(void);
429 extern int is_inside_git_dir(void);
430 extern char *git_work_tree_cfg;
431 extern int is_inside_work_tree(void);
432 extern int have_git_dir(void);
433 extern const char *get_git_dir(void);
434 extern char *get_object_directory(void);
435 extern char *get_index_file(void);
436 extern char *get_graft_file(void);
437 extern int set_git_dir(const char *path);
438 extern const char *get_git_namespace(void);
439 extern const char *strip_namespace(const char *namespaced_ref);
440 extern const char *get_git_work_tree(void);
441 extern const char *read_gitfile(const char *path);
442 extern void set_git_work_tree(const char *tree);
443
444 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
445
446 extern const char **get_pathspec(const char *prefix, const char **pathspec);
447 extern const char *pathspec_prefix(const char *prefix, const char **pathspec);
448 extern void setup_work_tree(void);
449 extern const char *setup_git_directory_gently(int *);
450 extern const char *setup_git_directory(void);
451 extern char *prefix_path(const char *prefix, int len, const char *path);
452 extern const char *prefix_filename(const char *prefix, int len, const char *path);
453 extern int check_filename(const char *prefix, const char *name);
454 extern void verify_filename(const char *prefix, const char *name);
455 extern void verify_non_filename(const char *prefix, const char *name);
456
457 #define INIT_DB_QUIET 0x0001
458
459 extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
460 extern int init_db(const char *template_dir, unsigned int flags);
461
462 #define alloc_nr(x) (((x)+16)*3/2)
463
464 /*
465 * Realloc the buffer pointed at by variable 'x' so that it can hold
466 * at least 'nr' entries; the number of entries currently allocated
467 * is 'alloc', using the standard growing factor alloc_nr() macro.
468 *
469 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
470 */
471 #define ALLOC_GROW(x, nr, alloc) \
472 do { \
473 if ((nr) > alloc) { \
474 if (alloc_nr(alloc) < (nr)) \
475 alloc = (nr); \
476 else \
477 alloc = alloc_nr(alloc); \
478 x = xrealloc((x), alloc * sizeof(*(x))); \
479 } \
480 } while (0)
481
482 /* Initialize and use the cache information */
483 extern int read_index(struct index_state *);
484 extern int read_index_preload(struct index_state *, const char **pathspec);
485 extern int read_index_from(struct index_state *, const char *path);
486 extern int is_index_unborn(struct index_state *);
487 extern int read_index_unmerged(struct index_state *);
488 extern int write_index(struct index_state *, int newfd);
489 extern int discard_index(struct index_state *);
490 extern int unmerged_index(const struct index_state *);
491 extern int verify_path(const char *path);
492 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
493 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
494 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
495 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
496 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
497 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
498 #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
499 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
500 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
501 extern int remove_index_entry_at(struct index_state *, int pos);
502 extern void remove_marked_cache_entries(struct index_state *istate);
503 extern int remove_file_from_index(struct index_state *, const char *path);
504 #define ADD_CACHE_VERBOSE 1
505 #define ADD_CACHE_PRETEND 2
506 #define ADD_CACHE_IGNORE_ERRORS 4
507 #define ADD_CACHE_IGNORE_REMOVAL 8
508 #define ADD_CACHE_INTENT 16
509 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
510 extern int add_file_to_index(struct index_state *, const char *path, int flags);
511 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
512 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
513 extern int index_name_is_other(const struct index_state *, const char *, int);
514
515 /* do stat comparison even if CE_VALID is true */
516 #define CE_MATCH_IGNORE_VALID 01
517 /* do not check the contents but report dirty on racily-clean entries */
518 #define CE_MATCH_RACY_IS_DIRTY 02
519 /* do stat comparison even if CE_SKIP_WORKTREE is true */
520 #define CE_MATCH_IGNORE_SKIP_WORKTREE 04
521 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
522 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
523
524 struct pathspec {
525 const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
526 int nr;
527 unsigned int has_wildcard:1;
528 unsigned int recursive:1;
529 int max_depth;
530 struct pathspec_item {
531 const char *match;
532 int len;
533 unsigned int use_wildcard:1;
534 } *items;
535 };
536
537 extern int init_pathspec(struct pathspec *, const char **);
538 extern void free_pathspec(struct pathspec *);
539 extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
540
541 #define HASH_WRITE_OBJECT 1
542 #define HASH_FORMAT_CHECK 2
543 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
544 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
545 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
546
547 #define REFRESH_REALLY 0x0001 /* ignore_valid */
548 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
549 #define REFRESH_QUIET 0x0004 /* be quiet about it */
550 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
551 #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
552 #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
553 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
554
555 struct lock_file {
556 struct lock_file *next;
557 int fd;
558 pid_t owner;
559 char on_list;
560 char filename[PATH_MAX];
561 };
562 #define LOCK_DIE_ON_ERROR 1
563 #define LOCK_NODEREF 2
564 extern int unable_to_lock_error(const char *path, int err);
565 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
566 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
567 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
568 extern int commit_lock_file(struct lock_file *);
569 extern void update_index_if_able(struct index_state *, struct lock_file *);
570
571 extern int hold_locked_index(struct lock_file *, int);
572 extern int commit_locked_index(struct lock_file *);
573 extern void set_alternate_index_output(const char *);
574 extern int close_lock_file(struct lock_file *);
575 extern void rollback_lock_file(struct lock_file *);
576 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
577
578 /* Environment bits from configuration mechanism */
579 extern int trust_executable_bit;
580 extern int trust_ctime;
581 extern int quote_path_fully;
582 extern int has_symlinks;
583 extern int minimum_abbrev, default_abbrev;
584 extern int ignore_case;
585 extern int assume_unchanged;
586 extern int prefer_symlink_refs;
587 extern int log_all_ref_updates;
588 extern int warn_ambiguous_refs;
589 extern int shared_repository;
590 extern const char *apply_default_whitespace;
591 extern const char *apply_default_ignorewhitespace;
592 extern int zlib_compression_level;
593 extern int core_compression_level;
594 extern int core_compression_seen;
595 extern size_t packed_git_window_size;
596 extern size_t packed_git_limit;
597 extern size_t delta_base_cache_limit;
598 extern unsigned long big_file_threshold;
599 extern int read_replace_refs;
600 extern int fsync_object_files;
601 extern int core_preload_index;
602 extern int core_apply_sparse_checkout;
603
604 enum branch_track {
605 BRANCH_TRACK_UNSPECIFIED = -1,
606 BRANCH_TRACK_NEVER = 0,
607 BRANCH_TRACK_REMOTE,
608 BRANCH_TRACK_ALWAYS,
609 BRANCH_TRACK_EXPLICIT,
610 BRANCH_TRACK_OVERRIDE
611 };
612
613 enum rebase_setup_type {
614 AUTOREBASE_NEVER = 0,
615 AUTOREBASE_LOCAL,
616 AUTOREBASE_REMOTE,
617 AUTOREBASE_ALWAYS
618 };
619
620 enum push_default_type {
621 PUSH_DEFAULT_NOTHING = 0,
622 PUSH_DEFAULT_MATCHING,
623 PUSH_DEFAULT_UPSTREAM,
624 PUSH_DEFAULT_CURRENT
625 };
626
627 extern enum branch_track git_branch_track;
628 extern enum rebase_setup_type autorebase;
629 extern enum push_default_type push_default;
630
631 enum object_creation_mode {
632 OBJECT_CREATION_USES_HARDLINKS = 0,
633 OBJECT_CREATION_USES_RENAMES = 1
634 };
635
636 extern enum object_creation_mode object_creation_mode;
637
638 extern char *notes_ref_name;
639
640 extern int grafts_replace_parents;
641
642 #define GIT_REPO_VERSION 0
643 extern int repository_format_version;
644 extern int check_repository_format(void);
645
646 #define MTIME_CHANGED 0x0001
647 #define CTIME_CHANGED 0x0002
648 #define OWNER_CHANGED 0x0004
649 #define MODE_CHANGED 0x0008
650 #define INODE_CHANGED 0x0010
651 #define DATA_CHANGED 0x0020
652 #define TYPE_CHANGED 0x0040
653
654 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
655 __attribute__((format (printf, 3, 4)));
656 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
657 __attribute__((format (printf, 3, 4)));
658 extern char *git_pathdup(const char *fmt, ...)
659 __attribute__((format (printf, 1, 2)));
660
661 /* Return a statically allocated filename matching the sha1 signature */
662 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
663 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
664 extern char *git_path_submodule(const char *path, const char *fmt, ...)
665 __attribute__((format (printf, 2, 3)));
666
667 extern char *sha1_file_name(const unsigned char *sha1);
668 extern char *sha1_pack_name(const unsigned char *sha1);
669 extern char *sha1_pack_index_name(const unsigned char *sha1);
670 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
671 extern const unsigned char null_sha1[20];
672
673 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
674 {
675 int i;
676
677 for (i = 0; i < 20; i++, sha1++, sha2++) {
678 if (*sha1 != *sha2)
679 return *sha1 - *sha2;
680 }
681
682 return 0;
683 }
684
685 static inline int is_null_sha1(const unsigned char *sha1)
686 {
687 return !hashcmp(sha1, null_sha1);
688 }
689
690 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
691 {
692 memcpy(sha_dst, sha_src, 20);
693 }
694 static inline void hashclr(unsigned char *hash)
695 {
696 memset(hash, 0, 20);
697 }
698
699 #define EMPTY_TREE_SHA1_HEX \
700 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
701 #define EMPTY_TREE_SHA1_BIN_LITERAL \
702 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
703 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
704 #define EMPTY_TREE_SHA1_BIN \
705 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
706
707 int git_mkstemp(char *path, size_t n, const char *template);
708
709 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
710
711 /* set default permissions by passing mode arguments to open(2) */
712 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
713 int git_mkstemp_mode(char *pattern, int mode);
714
715 /*
716 * NOTE NOTE NOTE!!
717 *
718 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
719 * not be changed. Old repositories have core.sharedrepository written in
720 * numeric format, and therefore these values are preserved for compatibility
721 * reasons.
722 */
723 enum sharedrepo {
724 PERM_UMASK = 0,
725 OLD_PERM_GROUP = 1,
726 OLD_PERM_EVERYBODY = 2,
727 PERM_GROUP = 0660,
728 PERM_EVERYBODY = 0664
729 };
730 int git_config_perm(const char *var, const char *value);
731 int set_shared_perm(const char *path, int mode);
732 #define adjust_shared_perm(path) set_shared_perm((path), 0)
733 int safe_create_leading_directories(char *path);
734 int safe_create_leading_directories_const(const char *path);
735 int mkdir_in_gitdir(const char *path);
736 extern char *expand_user_path(const char *path);
737 char *enter_repo(char *path, int strict);
738 static inline int is_absolute_path(const char *path)
739 {
740 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
741 }
742 int is_directory(const char *);
743 const char *real_path(const char *path);
744 const char *absolute_path(const char *path);
745 const char *relative_path(const char *abs, const char *base);
746 int normalize_path_copy(char *dst, const char *src);
747 int longest_ancestor_length(const char *path, const char *prefix_list);
748 char *strip_path_suffix(const char *path, const char *suffix);
749 int daemon_avoid_alias(const char *path);
750 int offset_1st_component(const char *path);
751
752 /* object replacement */
753 #define READ_SHA1_FILE_REPLACE 1
754 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
755 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
756 {
757 return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
758 }
759 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
760 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
761 {
762 if (!read_replace_refs)
763 return sha1;
764 return do_lookup_replace_object(sha1);
765 }
766
767 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
768 extern int sha1_object_info(const unsigned char *, unsigned long *);
769 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
770 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
771 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
772 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
773 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
774 extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
775 extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
776
777 /* global flag to enable extra checks when accessing packed objects */
778 extern int do_check_packed_object_crc;
779
780 /* for development: log offset of pack access */
781 extern const char *log_pack_access;
782
783 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
784
785 extern int move_temp_to_file(const char *tmpfile, const char *filename);
786
787 extern int has_sha1_pack(const unsigned char *sha1);
788 extern int has_sha1_file(const unsigned char *sha1);
789 extern int has_loose_object_nonlocal(const unsigned char *sha1);
790
791 extern int has_pack_index(const unsigned char *sha1);
792
793 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
794
795 extern const signed char hexval_table[256];
796 static inline unsigned int hexval(unsigned char c)
797 {
798 return hexval_table[c];
799 }
800
801 /* Convert to/from hex/sha1 representation */
802 #define MINIMUM_ABBREV minimum_abbrev
803 #define DEFAULT_ABBREV default_abbrev
804
805 struct object_context {
806 unsigned char tree[20];
807 char path[PATH_MAX];
808 unsigned mode;
809 };
810
811 extern int get_sha1(const char *str, unsigned char *sha1);
812 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
813 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
814 {
815 return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
816 }
817 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
818 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
819 {
820 return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
821 }
822 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
823 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
824 extern int read_ref(const char *filename, unsigned char *sha1);
825 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
826 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
827 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
828 extern int interpret_branch_name(const char *str, struct strbuf *);
829 extern int get_sha1_mb(const char *str, unsigned char *sha1);
830
831 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
832 extern const char *ref_rev_parse_rules[];
833 extern const char *ref_fetch_rules[];
834
835 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
836 extern int validate_headref(const char *ref);
837
838 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
839 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
840 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
841
842 extern void *read_object_with_reference(const unsigned char *sha1,
843 const char *required_type,
844 unsigned long *size,
845 unsigned char *sha1_ret);
846
847 extern struct object *peel_to_type(const char *name, int namelen,
848 struct object *o, enum object_type);
849
850 enum date_mode {
851 DATE_NORMAL = 0,
852 DATE_RELATIVE,
853 DATE_SHORT,
854 DATE_LOCAL,
855 DATE_ISO8601,
856 DATE_RFC2822,
857 DATE_RAW
858 };
859
860 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
861 const char *show_date_relative(unsigned long time, int tz,
862 const struct timeval *now,
863 char *timebuf,
864 size_t timebuf_size);
865 int parse_date(const char *date, char *buf, int bufsize);
866 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
867 void datestamp(char *buf, int bufsize);
868 #define approxidate(s) approxidate_careful((s), NULL)
869 unsigned long approxidate_careful(const char *, int *);
870 unsigned long approxidate_relative(const char *date, const struct timeval *now);
871 enum date_mode parse_date_format(const char *format);
872
873 #define IDENT_WARN_ON_NO_NAME 1
874 #define IDENT_ERROR_ON_NO_NAME 2
875 #define IDENT_NO_DATE 4
876 extern const char *git_author_info(int);
877 extern const char *git_committer_info(int);
878 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
879 extern const char *fmt_name(const char *name, const char *email);
880 extern const char *git_editor(void);
881 extern const char *git_pager(int stdout_is_tty);
882
883 struct checkout {
884 const char *base_dir;
885 int base_dir_len;
886 unsigned force:1,
887 quiet:1,
888 not_new:1,
889 refresh_cache:1;
890 };
891
892 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
893
894 struct cache_def {
895 char path[PATH_MAX + 1];
896 int len;
897 int flags;
898 int track_flags;
899 int prefix_len_stat_func;
900 };
901
902 extern int has_symlink_leading_path(const char *name, int len);
903 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
904 extern int check_leading_path(const char *name, int len);
905 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
906 extern void schedule_dir_for_removal(const char *name, int len);
907 extern void remove_scheduled_dirs(void);
908
909 extern struct alternate_object_database {
910 struct alternate_object_database *next;
911 char *name;
912 char base[FLEX_ARRAY]; /* more */
913 } *alt_odb_list;
914 extern void prepare_alt_odb(void);
915 extern void add_to_alternates_file(const char *reference);
916 typedef int alt_odb_fn(struct alternate_object_database *, void *);
917 extern void foreach_alt_odb(alt_odb_fn, void*);
918
919 struct pack_window {
920 struct pack_window *next;
921 unsigned char *base;
922 off_t offset;
923 size_t len;
924 unsigned int last_used;
925 unsigned int inuse_cnt;
926 };
927
928 extern struct packed_git {
929 struct packed_git *next;
930 struct pack_window *windows;
931 off_t pack_size;
932 const void *index_data;
933 size_t index_size;
934 uint32_t num_objects;
935 uint32_t num_bad_objects;
936 unsigned char *bad_object_sha1;
937 int index_version;
938 time_t mtime;
939 int pack_fd;
940 unsigned pack_local:1,
941 pack_keep:1,
942 do_not_close:1;
943 unsigned char sha1[20];
944 /* something like ".git/objects/pack/xxxxx.pack" */
945 char pack_name[FLEX_ARRAY]; /* more */
946 } *packed_git;
947
948 struct pack_entry {
949 off_t offset;
950 unsigned char sha1[20];
951 struct packed_git *p;
952 };
953
954 struct ref {
955 struct ref *next;
956 unsigned char old_sha1[20];
957 unsigned char new_sha1[20];
958 char *symref;
959 unsigned int force:1,
960 merge:1,
961 nonfastforward:1,
962 deletion:1;
963 enum {
964 REF_STATUS_NONE = 0,
965 REF_STATUS_OK,
966 REF_STATUS_REJECT_NONFASTFORWARD,
967 REF_STATUS_REJECT_NODELETE,
968 REF_STATUS_UPTODATE,
969 REF_STATUS_REMOTE_REJECT,
970 REF_STATUS_EXPECTING_REPORT
971 } status;
972 char *remote_status;
973 struct ref *peer_ref; /* when renaming */
974 char name[FLEX_ARRAY]; /* more */
975 };
976
977 #define REF_NORMAL (1u << 0)
978 #define REF_HEADS (1u << 1)
979 #define REF_TAGS (1u << 2)
980
981 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
982
983 #define CONNECT_VERBOSE (1u << 0)
984 extern char *git_getpass(const char *prompt);
985 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
986 extern int finish_connect(struct child_process *conn);
987 extern int git_connection_is_socket(struct child_process *conn);
988 extern int path_match(const char *path, int nr, char **match);
989 struct extra_have_objects {
990 int nr, alloc;
991 unsigned char (*array)[20];
992 };
993 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
994 extern int server_supports(const char *feature);
995
996 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
997
998 extern void prepare_packed_git(void);
999 extern void reprepare_packed_git(void);
1000 extern void install_packed_git(struct packed_git *pack);
1001
1002 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1003 struct packed_git *packs);
1004
1005 extern void pack_report(void);
1006 extern int open_pack_index(struct packed_git *);
1007 extern void close_pack_index(struct packed_git *);
1008 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1009 extern void close_pack_windows(struct packed_git *);
1010 extern void unuse_pack(struct pack_window **);
1011 extern void free_pack_by_name(const char *);
1012 extern void clear_delta_base_cache(void);
1013 extern struct packed_git *add_packed_git(const char *, int, int);
1014 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1015 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1016 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1017 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1018 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1019 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1020 extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1021
1022 struct object_info {
1023 /* Request */
1024 unsigned long *sizep;
1025
1026 /* Response */
1027 enum {
1028 OI_CACHED,
1029 OI_LOOSE,
1030 OI_PACKED,
1031 OI_DBCACHED
1032 } whence;
1033 union {
1034 /*
1035 * struct {
1036 * ... Nothing to expose in this case
1037 * } cached;
1038 * struct {
1039 * ... Nothing to expose in this case
1040 * } loose;
1041 */
1042 struct {
1043 struct packed_git *pack;
1044 off_t offset;
1045 unsigned int is_delta;
1046 } packed;
1047 } u;
1048 };
1049 extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1050
1051 /* Dumb servers support */
1052 extern int update_server_info(int);
1053
1054 /* git_config_parse_key() returns these negated: */
1055 #define CONFIG_INVALID_KEY 1
1056 #define CONFIG_NO_SECTION_OR_NAME 2
1057 /* git_config_set(), git_config_set_multivar() return the above or these: */
1058 #define CONFIG_NO_LOCK -1
1059 #define CONFIG_INVALID_FILE 3
1060 #define CONFIG_NO_WRITE 4
1061 #define CONFIG_NOTHING_SET 5
1062 #define CONFIG_INVALID_PATTERN 6
1063
1064 typedef int (*config_fn_t)(const char *, const char *, void *);
1065 extern int git_default_config(const char *, const char *, void *);
1066 extern int git_config_from_file(config_fn_t fn, const char *, void *);
1067 extern void git_config_push_parameter(const char *text);
1068 extern int git_config_from_parameters(config_fn_t fn, void *data);
1069 extern int git_config(config_fn_t fn, void *);
1070 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1071 extern int git_parse_ulong(const char *, unsigned long *);
1072 extern int git_config_int(const char *, const char *);
1073 extern unsigned long git_config_ulong(const char *, const char *);
1074 extern int git_config_bool_or_int(const char *, const char *, int *);
1075 extern int git_config_bool(const char *, const char *);
1076 extern int git_config_maybe_bool(const char *, const char *);
1077 extern int git_config_string(const char **, const char *, const char *);
1078 extern int git_config_pathname(const char **, const char *, const char *);
1079 extern int git_config_set(const char *, const char *);
1080 extern int git_config_parse_key(const char *, char **, int *);
1081 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1082 extern int git_config_rename_section(const char *, const char *);
1083 extern const char *git_etc_gitconfig(void);
1084 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1085 extern int git_env_bool(const char *, int);
1086 extern int git_config_system(void);
1087 extern int config_error_nonbool(const char *);
1088 extern const char *get_log_output_encoding(void);
1089 extern const char *get_commit_output_encoding(void);
1090
1091 extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1092
1093 extern const char *config_exclusive_filename;
1094
1095 #define MAX_GITNAME (1000)
1096 extern char git_default_email[MAX_GITNAME];
1097 extern char git_default_name[MAX_GITNAME];
1098 #define IDENT_NAME_GIVEN 01
1099 #define IDENT_MAIL_GIVEN 02
1100 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1101 extern int user_ident_explicitly_given;
1102 extern int user_ident_sufficiently_given(void);
1103
1104 extern const char *git_commit_encoding;
1105 extern const char *git_log_output_encoding;
1106 extern const char *git_mailmap_file;
1107
1108 /* IO helper functions */
1109 extern void maybe_flush_or_die(FILE *, const char *);
1110 extern int copy_fd(int ifd, int ofd);
1111 extern int copy_file(const char *dst, const char *src, int mode);
1112 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1113 extern void write_or_die(int fd, const void *buf, size_t count);
1114 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1115 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1116 extern void fsync_or_die(int fd, const char *);
1117
1118 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1119 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1120 static inline ssize_t write_str_in_full(int fd, const char *str)
1121 {
1122 return write_in_full(fd, str, strlen(str));
1123 }
1124
1125 /* pager.c */
1126 extern void setup_pager(void);
1127 extern const char *pager_program;
1128 extern int pager_in_use(void);
1129 extern int pager_use_color;
1130
1131 extern const char *editor_program;
1132 extern const char *askpass_program;
1133 extern const char *excludes_file;
1134
1135 /* base85 */
1136 int decode_85(char *dst, const char *line, int linelen);
1137 void encode_85(char *buf, const unsigned char *data, int bytes);
1138
1139 /* alloc.c */
1140 extern void *alloc_blob_node(void);
1141 extern void *alloc_tree_node(void);
1142 extern void *alloc_commit_node(void);
1143 extern void *alloc_tag_node(void);
1144 extern void *alloc_object_node(void);
1145 extern void alloc_report(void);
1146
1147 /* trace.c */
1148 __attribute__((format (printf, 1, 2)))
1149 extern void trace_printf(const char *format, ...);
1150 extern void trace_vprintf(const char *key, const char *format, va_list ap);
1151 __attribute__((format (printf, 2, 3)))
1152 extern void trace_argv_printf(const char **argv, const char *format, ...);
1153 extern void trace_repo_setup(const char *prefix);
1154 extern int trace_want(const char *key);
1155 extern void trace_strbuf(const char *key, const struct strbuf *buf);
1156
1157 void packet_trace_identity(const char *prog);
1158
1159 /* add */
1160 /*
1161 * return 0 if success, 1 - if addition of a file failed and
1162 * ADD_FILES_IGNORE_ERRORS was specified in flags
1163 */
1164 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1165
1166 /* diff.c */
1167 extern int diff_auto_refresh_index;
1168
1169 /* match-trees.c */
1170 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1171 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1172
1173 /*
1174 * whitespace rules.
1175 * used by both diff and apply
1176 * last two digits are tab width
1177 */
1178 #define WS_BLANK_AT_EOL 0100
1179 #define WS_SPACE_BEFORE_TAB 0200
1180 #define WS_INDENT_WITH_NON_TAB 0400
1181 #define WS_CR_AT_EOL 01000
1182 #define WS_BLANK_AT_EOF 02000
1183 #define WS_TAB_IN_INDENT 04000
1184 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1185 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1186 #define WS_TAB_WIDTH_MASK 077
1187 extern unsigned whitespace_rule_cfg;
1188 extern unsigned whitespace_rule(const char *);
1189 extern unsigned parse_whitespace_rule(const char *);
1190 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1191 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1192 extern char *whitespace_error_string(unsigned ws);
1193 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1194 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1195 #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1196
1197 /* ls-files */
1198 int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1199 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1200
1201 char *alias_lookup(const char *alias);
1202 int split_cmdline(char *cmdline, const char ***argv);
1203 /* Takes a negative value returned by split_cmdline */
1204 const char *split_cmdline_strerror(int cmdline_errno);
1205
1206 /* git.c */
1207 struct startup_info {
1208 int have_repository;
1209 const char *prefix;
1210 };
1211 extern struct startup_info *startup_info;
1212
1213 /* builtin/merge.c */
1214 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1215
1216 #endif /* CACHE_H */