Merge branch '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 struct cache_entry *dir_next;
172 char name[FLEX_ARRAY]; /* more */
173 };
174
175 #define CE_NAMEMASK (0x0fff)
176 #define CE_STAGEMASK (0x3000)
177 #define CE_EXTENDED (0x4000)
178 #define CE_VALID (0x8000)
179 #define CE_STAGESHIFT 12
180
181 /*
182 * Range 0xFFFF0000 in ce_flags is divided into
183 * two parts: in-memory flags and on-disk ones.
184 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
185 * if you want to save a new flag, add it in
186 * CE_EXTENDED_FLAGS
187 *
188 * In-memory only flags
189 */
190 #define CE_UPDATE (1 << 16)
191 #define CE_REMOVE (1 << 17)
192 #define CE_UPTODATE (1 << 18)
193 #define CE_ADDED (1 << 19)
194
195 #define CE_HASHED (1 << 20)
196 #define CE_UNHASHED (1 << 21)
197 #define CE_WT_REMOVE (1 << 22) /* remove in work directory */
198 #define CE_CONFLICTED (1 << 23)
199
200 #define CE_UNPACKED (1 << 24)
201 #define CE_NEW_SKIP_WORKTREE (1 << 25)
202
203 /*
204 * Extended on-disk flags
205 */
206 #define CE_INTENT_TO_ADD (1 << 29)
207 #define CE_SKIP_WORKTREE (1 << 30)
208 /* CE_EXTENDED2 is for future extension */
209 #define CE_EXTENDED2 (1 << 31)
210
211 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
212
213 /*
214 * Safeguard to avoid saving wrong flags:
215 * - CE_EXTENDED2 won't get saved until its semantic is known
216 * - Bits in 0x0000FFFF have been saved in ce_flags already
217 * - Bits in 0x003F0000 are currently in-memory flags
218 */
219 #if CE_EXTENDED_FLAGS & 0x803FFFFF
220 #error "CE_EXTENDED_FLAGS out of range"
221 #endif
222
223 /*
224 * Copy the sha1 and stat state of a cache entry from one to
225 * another. But we never change the name, or the hash state!
226 */
227 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
228 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
229 {
230 unsigned int state = dst->ce_flags & CE_STATE_MASK;
231
232 /* Don't copy hash chain and name */
233 memcpy(dst, src, offsetof(struct cache_entry, next));
234
235 /* Restore the hash state */
236 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
237 }
238
239 static inline unsigned create_ce_flags(size_t len, unsigned stage)
240 {
241 if (len >= CE_NAMEMASK)
242 len = CE_NAMEMASK;
243 return (len | (stage << CE_STAGESHIFT));
244 }
245
246 static inline size_t ce_namelen(const struct cache_entry *ce)
247 {
248 size_t len = ce->ce_flags & CE_NAMEMASK;
249 if (len < CE_NAMEMASK)
250 return len;
251 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
252 }
253
254 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
255 #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
256 ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
257 ondisk_cache_entry_size(ce_namelen(ce)))
258 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
259 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
260 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
261 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
262
263 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
264 static inline unsigned int create_ce_mode(unsigned int mode)
265 {
266 if (S_ISLNK(mode))
267 return S_IFLNK;
268 if (S_ISDIR(mode) || S_ISGITLINK(mode))
269 return S_IFGITLINK;
270 return S_IFREG | ce_permissions(mode);
271 }
272 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
273 {
274 extern int trust_executable_bit, has_symlinks;
275 if (!has_symlinks && S_ISREG(mode) &&
276 ce && S_ISLNK(ce->ce_mode))
277 return ce->ce_mode;
278 if (!trust_executable_bit && S_ISREG(mode)) {
279 if (ce && S_ISREG(ce->ce_mode))
280 return ce->ce_mode;
281 return create_ce_mode(0666);
282 }
283 return create_ce_mode(mode);
284 }
285 static inline int ce_to_dtype(const struct cache_entry *ce)
286 {
287 unsigned ce_mode = ntohl(ce->ce_mode);
288 if (S_ISREG(ce_mode))
289 return DT_REG;
290 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
291 return DT_DIR;
292 else if (S_ISLNK(ce_mode))
293 return DT_LNK;
294 else
295 return DT_UNKNOWN;
296 }
297 static inline unsigned int canon_mode(unsigned int mode)
298 {
299 if (S_ISREG(mode))
300 return S_IFREG | ce_permissions(mode);
301 if (S_ISLNK(mode))
302 return S_IFLNK;
303 if (S_ISDIR(mode))
304 return S_IFDIR;
305 return S_IFGITLINK;
306 }
307
308 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
309 #define cache_entry_size(len) flexible_size(cache_entry,len)
310 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
311 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
312
313 struct index_state {
314 struct cache_entry **cache;
315 unsigned int cache_nr, cache_alloc, cache_changed;
316 struct string_list *resolve_undo;
317 struct cache_tree *cache_tree;
318 struct cache_time timestamp;
319 void *alloc;
320 unsigned name_hash_initialized : 1,
321 initialized : 1;
322 struct hash_table name_hash;
323 };
324
325 extern struct index_state the_index;
326
327 /* Name hashing */
328 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
329 /*
330 * We don't actually *remove* it, we can just mark it invalid so that
331 * we won't find it in lookups.
332 *
333 * Not only would we have to search the lists (simple enough), but
334 * we'd also have to rehash other hash buckets in case this makes the
335 * hash bucket empty (common). So it's much better to just mark
336 * it.
337 */
338 static inline void remove_name_hash(struct cache_entry *ce)
339 {
340 ce->ce_flags |= CE_UNHASHED;
341 }
342
343
344 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
345 #define active_cache (the_index.cache)
346 #define active_nr (the_index.cache_nr)
347 #define active_alloc (the_index.cache_alloc)
348 #define active_cache_changed (the_index.cache_changed)
349 #define active_cache_tree (the_index.cache_tree)
350
351 #define read_cache() read_index(&the_index)
352 #define read_cache_from(path) read_index_from(&the_index, (path))
353 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
354 #define is_cache_unborn() is_index_unborn(&the_index)
355 #define read_cache_unmerged() read_index_unmerged(&the_index)
356 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
357 #define discard_cache() discard_index(&the_index)
358 #define unmerged_cache() unmerged_index(&the_index)
359 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
360 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
361 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
362 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
363 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
364 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
365 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
366 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
367 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
368 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
369 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
370 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
371 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
372 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
373 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
374 #endif
375
376 enum object_type {
377 OBJ_BAD = -1,
378 OBJ_NONE = 0,
379 OBJ_COMMIT = 1,
380 OBJ_TREE = 2,
381 OBJ_BLOB = 3,
382 OBJ_TAG = 4,
383 /* 5 for future expansion */
384 OBJ_OFS_DELTA = 6,
385 OBJ_REF_DELTA = 7,
386 OBJ_ANY,
387 OBJ_MAX
388 };
389
390 static inline enum object_type object_type(unsigned int mode)
391 {
392 return S_ISDIR(mode) ? OBJ_TREE :
393 S_ISGITLINK(mode) ? OBJ_COMMIT :
394 OBJ_BLOB;
395 }
396
397 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
398 #define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
399 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
400 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
401 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
402 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
403 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
404 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
405 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
406 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
407 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
408 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
409 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
410 #define GITATTRIBUTES_FILE ".gitattributes"
411 #define INFOATTRIBUTES_FILE "info/attributes"
412 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
413 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
414 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
415 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
416 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
417 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
418
419 /*
420 * Repository-local GIT_* environment variables
421 * The array is NULL-terminated to simplify its usage in contexts such
422 * environment creation or simple walk of the list.
423 * The number of non-NULL entries is available as a macro.
424 */
425 #define LOCAL_REPO_ENV_SIZE 9
426 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
427
428 extern int is_bare_repository_cfg;
429 extern int is_bare_repository(void);
430 extern int is_inside_git_dir(void);
431 extern char *git_work_tree_cfg;
432 extern int is_inside_work_tree(void);
433 extern int have_git_dir(void);
434 extern const char *get_git_dir(void);
435 extern char *get_object_directory(void);
436 extern char *get_index_file(void);
437 extern char *get_graft_file(void);
438 extern int set_git_dir(const char *path);
439 extern const char *get_git_namespace(void);
440 extern const char *strip_namespace(const char *namespaced_ref);
441 extern const char *get_git_work_tree(void);
442 extern const char *read_gitfile(const char *path);
443 extern const char *resolve_gitdir(const char *suspect);
444 extern void set_git_work_tree(const char *tree);
445
446 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
447
448 extern const char **get_pathspec(const char *prefix, const char **pathspec);
449 extern void setup_work_tree(void);
450 extern const char *setup_git_directory_gently(int *);
451 extern const char *setup_git_directory(void);
452 extern char *prefix_path(const char *prefix, int len, const char *path);
453 extern const char *prefix_filename(const char *prefix, int len, const char *path);
454 extern int check_filename(const char *prefix, const char *name);
455 extern void verify_filename(const char *prefix, const char *name);
456 extern void verify_non_filename(const char *prefix, const char *name);
457
458 #define INIT_DB_QUIET 0x0001
459
460 extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
461 extern int init_db(const char *template_dir, unsigned int flags);
462
463 #define alloc_nr(x) (((x)+16)*3/2)
464
465 /*
466 * Realloc the buffer pointed at by variable 'x' so that it can hold
467 * at least 'nr' entries; the number of entries currently allocated
468 * is 'alloc', using the standard growing factor alloc_nr() macro.
469 *
470 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
471 */
472 #define ALLOC_GROW(x, nr, alloc) \
473 do { \
474 if ((nr) > alloc) { \
475 if (alloc_nr(alloc) < (nr)) \
476 alloc = (nr); \
477 else \
478 alloc = alloc_nr(alloc); \
479 x = xrealloc((x), alloc * sizeof(*(x))); \
480 } \
481 } while (0)
482
483 /* Initialize and use the cache information */
484 extern int read_index(struct index_state *);
485 extern int read_index_preload(struct index_state *, const char **pathspec);
486 extern int read_index_from(struct index_state *, const char *path);
487 extern int is_index_unborn(struct index_state *);
488 extern int read_index_unmerged(struct index_state *);
489 extern int write_index(struct index_state *, int newfd);
490 extern int discard_index(struct index_state *);
491 extern int unmerged_index(const struct index_state *);
492 extern int verify_path(const char *path);
493 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
494 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
495 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
496 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
497 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
498 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
499 #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
500 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
501 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
502 extern int remove_index_entry_at(struct index_state *, int pos);
503 extern void remove_marked_cache_entries(struct index_state *istate);
504 extern int remove_file_from_index(struct index_state *, const char *path);
505 #define ADD_CACHE_VERBOSE 1
506 #define ADD_CACHE_PRETEND 2
507 #define ADD_CACHE_IGNORE_ERRORS 4
508 #define ADD_CACHE_IGNORE_REMOVAL 8
509 #define ADD_CACHE_INTENT 16
510 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
511 extern int add_file_to_index(struct index_state *, const char *path, int flags);
512 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
513 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
514 extern int index_name_is_other(const struct index_state *, const char *, int);
515
516 /* do stat comparison even if CE_VALID is true */
517 #define CE_MATCH_IGNORE_VALID 01
518 /* do not check the contents but report dirty on racily-clean entries */
519 #define CE_MATCH_RACY_IS_DIRTY 02
520 /* do stat comparison even if CE_SKIP_WORKTREE is true */
521 #define CE_MATCH_IGNORE_SKIP_WORKTREE 04
522 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
523 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
524
525 struct pathspec {
526 const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
527 int nr;
528 unsigned int has_wildcard:1;
529 unsigned int recursive:1;
530 int max_depth;
531 struct pathspec_item {
532 const char *match;
533 int len;
534 unsigned int use_wildcard:1;
535 } *items;
536 };
537
538 extern int init_pathspec(struct pathspec *, const char **);
539 extern void free_pathspec(struct pathspec *);
540 extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
541
542 #define HASH_WRITE_OBJECT 1
543 #define HASH_FORMAT_CHECK 2
544 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
545 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
546 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
547
548 #define REFRESH_REALLY 0x0001 /* ignore_valid */
549 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
550 #define REFRESH_QUIET 0x0004 /* be quiet about it */
551 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
552 #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
553 #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
554 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
555
556 struct lock_file {
557 struct lock_file *next;
558 int fd;
559 pid_t owner;
560 char on_list;
561 char filename[PATH_MAX];
562 };
563 #define LOCK_DIE_ON_ERROR 1
564 #define LOCK_NODEREF 2
565 extern int unable_to_lock_error(const char *path, int err);
566 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
567 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
568 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
569 extern int commit_lock_file(struct lock_file *);
570 extern void update_index_if_able(struct index_state *, struct lock_file *);
571
572 extern int hold_locked_index(struct lock_file *, int);
573 extern int commit_locked_index(struct lock_file *);
574 extern void set_alternate_index_output(const char *);
575 extern int close_lock_file(struct lock_file *);
576 extern void rollback_lock_file(struct lock_file *);
577 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
578
579 /* Environment bits from configuration mechanism */
580 extern int trust_executable_bit;
581 extern int trust_ctime;
582 extern int quote_path_fully;
583 extern int has_symlinks;
584 extern int minimum_abbrev, default_abbrev;
585 extern int ignore_case;
586 extern int assume_unchanged;
587 extern int prefer_symlink_refs;
588 extern int log_all_ref_updates;
589 extern int warn_ambiguous_refs;
590 extern int shared_repository;
591 extern const char *apply_default_whitespace;
592 extern const char *apply_default_ignorewhitespace;
593 extern const char *git_attributes_file;
594 extern int zlib_compression_level;
595 extern int core_compression_level;
596 extern int core_compression_seen;
597 extern size_t packed_git_window_size;
598 extern size_t packed_git_limit;
599 extern size_t delta_base_cache_limit;
600 extern unsigned long big_file_threshold;
601 extern int read_replace_refs;
602 extern int fsync_object_files;
603 extern int core_preload_index;
604 extern int core_apply_sparse_checkout;
605
606 enum branch_track {
607 BRANCH_TRACK_UNSPECIFIED = -1,
608 BRANCH_TRACK_NEVER = 0,
609 BRANCH_TRACK_REMOTE,
610 BRANCH_TRACK_ALWAYS,
611 BRANCH_TRACK_EXPLICIT,
612 BRANCH_TRACK_OVERRIDE
613 };
614
615 enum rebase_setup_type {
616 AUTOREBASE_NEVER = 0,
617 AUTOREBASE_LOCAL,
618 AUTOREBASE_REMOTE,
619 AUTOREBASE_ALWAYS
620 };
621
622 enum push_default_type {
623 PUSH_DEFAULT_NOTHING = 0,
624 PUSH_DEFAULT_MATCHING,
625 PUSH_DEFAULT_UPSTREAM,
626 PUSH_DEFAULT_CURRENT
627 };
628
629 extern enum branch_track git_branch_track;
630 extern enum rebase_setup_type autorebase;
631 extern enum push_default_type push_default;
632
633 enum object_creation_mode {
634 OBJECT_CREATION_USES_HARDLINKS = 0,
635 OBJECT_CREATION_USES_RENAMES = 1
636 };
637
638 extern enum object_creation_mode object_creation_mode;
639
640 extern char *notes_ref_name;
641
642 extern int grafts_replace_parents;
643
644 #define GIT_REPO_VERSION 0
645 extern int repository_format_version;
646 extern int check_repository_format(void);
647
648 #define MTIME_CHANGED 0x0001
649 #define CTIME_CHANGED 0x0002
650 #define OWNER_CHANGED 0x0004
651 #define MODE_CHANGED 0x0008
652 #define INODE_CHANGED 0x0010
653 #define DATA_CHANGED 0x0020
654 #define TYPE_CHANGED 0x0040
655
656 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
657 __attribute__((format (printf, 3, 4)));
658 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
659 __attribute__((format (printf, 3, 4)));
660 extern char *git_pathdup(const char *fmt, ...)
661 __attribute__((format (printf, 1, 2)));
662
663 /* Return a statically allocated filename matching the sha1 signature */
664 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
665 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
666 extern char *git_path_submodule(const char *path, const char *fmt, ...)
667 __attribute__((format (printf, 2, 3)));
668
669 extern char *sha1_file_name(const unsigned char *sha1);
670 extern char *sha1_pack_name(const unsigned char *sha1);
671 extern char *sha1_pack_index_name(const unsigned char *sha1);
672 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
673 extern const unsigned char null_sha1[20];
674
675 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
676 {
677 int i;
678
679 for (i = 0; i < 20; i++, sha1++, sha2++) {
680 if (*sha1 != *sha2)
681 return *sha1 - *sha2;
682 }
683
684 return 0;
685 }
686
687 static inline int is_null_sha1(const unsigned char *sha1)
688 {
689 return !hashcmp(sha1, null_sha1);
690 }
691
692 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
693 {
694 memcpy(sha_dst, sha_src, 20);
695 }
696 static inline void hashclr(unsigned char *hash)
697 {
698 memset(hash, 0, 20);
699 }
700
701 #define EMPTY_TREE_SHA1_HEX \
702 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
703 #define EMPTY_TREE_SHA1_BIN_LITERAL \
704 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
705 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
706 #define EMPTY_TREE_SHA1_BIN \
707 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
708
709 int git_mkstemp(char *path, size_t n, const char *template);
710
711 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
712
713 /* set default permissions by passing mode arguments to open(2) */
714 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
715 int git_mkstemp_mode(char *pattern, int mode);
716
717 /*
718 * NOTE NOTE NOTE!!
719 *
720 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
721 * not be changed. Old repositories have core.sharedrepository written in
722 * numeric format, and therefore these values are preserved for compatibility
723 * reasons.
724 */
725 enum sharedrepo {
726 PERM_UMASK = 0,
727 OLD_PERM_GROUP = 1,
728 OLD_PERM_EVERYBODY = 2,
729 PERM_GROUP = 0660,
730 PERM_EVERYBODY = 0664
731 };
732 int git_config_perm(const char *var, const char *value);
733 int set_shared_perm(const char *path, int mode);
734 #define adjust_shared_perm(path) set_shared_perm((path), 0)
735 int safe_create_leading_directories(char *path);
736 int safe_create_leading_directories_const(const char *path);
737 int mkdir_in_gitdir(const char *path);
738 extern char *expand_user_path(const char *path);
739 const char *enter_repo(const char *path, int strict);
740 static inline int is_absolute_path(const char *path)
741 {
742 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
743 }
744 int is_directory(const char *);
745 const char *real_path(const char *path);
746 const char *absolute_path(const char *path);
747 const char *relative_path(const char *abs, const char *base);
748 int normalize_path_copy(char *dst, const char *src);
749 int longest_ancestor_length(const char *path, const char *prefix_list);
750 char *strip_path_suffix(const char *path, const char *suffix);
751 int daemon_avoid_alias(const char *path);
752 int offset_1st_component(const char *path);
753
754 /* object replacement */
755 #define READ_SHA1_FILE_REPLACE 1
756 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
757 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
758 {
759 return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
760 }
761 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
762 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
763 {
764 if (!read_replace_refs)
765 return sha1;
766 return do_lookup_replace_object(sha1);
767 }
768
769 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
770 extern int sha1_object_info(const unsigned char *, unsigned long *);
771 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
772 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
773 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
774 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
775 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
776 extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
777 extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
778
779 /* global flag to enable extra checks when accessing packed objects */
780 extern int do_check_packed_object_crc;
781
782 /* for development: log offset of pack access */
783 extern const char *log_pack_access;
784
785 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
786
787 extern int move_temp_to_file(const char *tmpfile, const char *filename);
788
789 extern int has_sha1_pack(const unsigned char *sha1);
790 extern int has_sha1_file(const unsigned char *sha1);
791 extern int has_loose_object_nonlocal(const unsigned char *sha1);
792
793 extern int has_pack_index(const unsigned char *sha1);
794
795 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
796
797 extern const signed char hexval_table[256];
798 static inline unsigned int hexval(unsigned char c)
799 {
800 return hexval_table[c];
801 }
802
803 /* Convert to/from hex/sha1 representation */
804 #define MINIMUM_ABBREV minimum_abbrev
805 #define DEFAULT_ABBREV default_abbrev
806
807 struct object_context {
808 unsigned char tree[20];
809 char path[PATH_MAX];
810 unsigned mode;
811 };
812
813 extern int get_sha1(const char *str, unsigned char *sha1);
814 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
815 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
816 {
817 return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
818 }
819 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
820 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
821 {
822 return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
823 }
824
825 /*
826 * Try to read a SHA1 in hexadecimal format from the 40 characters
827 * starting at hex. Write the 20-byte result to sha1 in binary form.
828 * Return 0 on success. Reading stops if a NUL is encountered in the
829 * input, so it is safe to pass this function an arbitrary
830 * null-terminated string.
831 */
832 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
833
834 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
835 extern int read_ref(const char *filename, unsigned char *sha1);
836
837 /*
838 * Resolve a reference, recursively following symbolic refererences.
839 *
840 * Store the referred-to object's name in sha1 and return the name of
841 * the non-symbolic reference that ultimately pointed at it. The
842 * return value, if not NULL, is a pointer into either a static buffer
843 * or the input ref.
844 *
845 * If the reference cannot be resolved to an object, the behavior
846 * depends on the "reading" argument:
847 *
848 * - If reading is set, return NULL.
849 *
850 * - If reading is not set, clear sha1 and return the name of the last
851 * reference name in the chain, which will either be a non-symbolic
852 * reference or an undefined reference. If this is a prelude to
853 * "writing" to the ref, the return value is the name of the ref
854 * that will actually be created or changed.
855 *
856 * If flag is non-NULL, set the value that it points to the
857 * combination of REF_ISPACKED (if the reference was found among the
858 * packed references) and REF_ISSYMREF (if the initial reference was a
859 * symbolic reference).
860 *
861 * If ref is not a properly-formatted, normalized reference, return
862 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
863 * give up and return NULL.
864 *
865 * errno is sometimes set on errors, but not always.
866 */
867 extern const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag);
868
869 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
870 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
871 extern int interpret_branch_name(const char *str, struct strbuf *);
872 extern int get_sha1_mb(const char *str, unsigned char *sha1);
873
874 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
875 extern const char *ref_rev_parse_rules[];
876 extern const char *ref_fetch_rules[];
877
878 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
879 extern int validate_headref(const char *ref);
880
881 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
882 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
883 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
884
885 extern void *read_object_with_reference(const unsigned char *sha1,
886 const char *required_type,
887 unsigned long *size,
888 unsigned char *sha1_ret);
889
890 extern struct object *peel_to_type(const char *name, int namelen,
891 struct object *o, enum object_type);
892
893 enum date_mode {
894 DATE_NORMAL = 0,
895 DATE_RELATIVE,
896 DATE_SHORT,
897 DATE_LOCAL,
898 DATE_ISO8601,
899 DATE_RFC2822,
900 DATE_RAW
901 };
902
903 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
904 const char *show_date_relative(unsigned long time, int tz,
905 const struct timeval *now,
906 char *timebuf,
907 size_t timebuf_size);
908 int parse_date(const char *date, char *buf, int bufsize);
909 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
910 void datestamp(char *buf, int bufsize);
911 #define approxidate(s) approxidate_careful((s), NULL)
912 unsigned long approxidate_careful(const char *, int *);
913 unsigned long approxidate_relative(const char *date, const struct timeval *now);
914 enum date_mode parse_date_format(const char *format);
915
916 #define IDENT_WARN_ON_NO_NAME 1
917 #define IDENT_ERROR_ON_NO_NAME 2
918 #define IDENT_NO_DATE 4
919 extern const char *git_author_info(int);
920 extern const char *git_committer_info(int);
921 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
922 extern const char *fmt_name(const char *name, const char *email);
923 extern const char *git_editor(void);
924 extern const char *git_pager(int stdout_is_tty);
925
926 struct checkout {
927 const char *base_dir;
928 int base_dir_len;
929 unsigned force:1,
930 quiet:1,
931 not_new:1,
932 refresh_cache:1;
933 };
934
935 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
936
937 struct cache_def {
938 char path[PATH_MAX + 1];
939 int len;
940 int flags;
941 int track_flags;
942 int prefix_len_stat_func;
943 };
944
945 extern int has_symlink_leading_path(const char *name, int len);
946 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
947 extern int check_leading_path(const char *name, int len);
948 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
949 extern void schedule_dir_for_removal(const char *name, int len);
950 extern void remove_scheduled_dirs(void);
951
952 extern struct alternate_object_database {
953 struct alternate_object_database *next;
954 char *name;
955 char base[FLEX_ARRAY]; /* more */
956 } *alt_odb_list;
957 extern void prepare_alt_odb(void);
958 extern void add_to_alternates_file(const char *reference);
959 typedef int alt_odb_fn(struct alternate_object_database *, void *);
960 extern void foreach_alt_odb(alt_odb_fn, void*);
961
962 struct pack_window {
963 struct pack_window *next;
964 unsigned char *base;
965 off_t offset;
966 size_t len;
967 unsigned int last_used;
968 unsigned int inuse_cnt;
969 };
970
971 extern struct packed_git {
972 struct packed_git *next;
973 struct pack_window *windows;
974 off_t pack_size;
975 const void *index_data;
976 size_t index_size;
977 uint32_t num_objects;
978 uint32_t num_bad_objects;
979 unsigned char *bad_object_sha1;
980 int index_version;
981 time_t mtime;
982 int pack_fd;
983 unsigned pack_local:1,
984 pack_keep:1,
985 do_not_close:1;
986 unsigned char sha1[20];
987 /* something like ".git/objects/pack/xxxxx.pack" */
988 char pack_name[FLEX_ARRAY]; /* more */
989 } *packed_git;
990
991 struct pack_entry {
992 off_t offset;
993 unsigned char sha1[20];
994 struct packed_git *p;
995 };
996
997 struct ref {
998 struct ref *next;
999 unsigned char old_sha1[20];
1000 unsigned char new_sha1[20];
1001 char *symref;
1002 unsigned int force:1,
1003 merge:1,
1004 nonfastforward:1,
1005 deletion:1;
1006 enum {
1007 REF_STATUS_NONE = 0,
1008 REF_STATUS_OK,
1009 REF_STATUS_REJECT_NONFASTFORWARD,
1010 REF_STATUS_REJECT_NODELETE,
1011 REF_STATUS_UPTODATE,
1012 REF_STATUS_REMOTE_REJECT,
1013 REF_STATUS_EXPECTING_REPORT
1014 } status;
1015 char *remote_status;
1016 struct ref *peer_ref; /* when renaming */
1017 char name[FLEX_ARRAY]; /* more */
1018 };
1019
1020 #define REF_NORMAL (1u << 0)
1021 #define REF_HEADS (1u << 1)
1022 #define REF_TAGS (1u << 2)
1023
1024 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
1025
1026 #define CONNECT_VERBOSE (1u << 0)
1027 extern char *git_getpass(const char *prompt);
1028 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
1029 extern int finish_connect(struct child_process *conn);
1030 extern int git_connection_is_socket(struct child_process *conn);
1031 extern int path_match(const char *path, int nr, char **match);
1032 struct extra_have_objects {
1033 int nr, alloc;
1034 unsigned char (*array)[20];
1035 };
1036 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
1037 extern int server_supports(const char *feature);
1038
1039 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1040
1041 extern void prepare_packed_git(void);
1042 extern void reprepare_packed_git(void);
1043 extern void install_packed_git(struct packed_git *pack);
1044
1045 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1046 struct packed_git *packs);
1047
1048 extern void pack_report(void);
1049 extern int open_pack_index(struct packed_git *);
1050 extern void close_pack_index(struct packed_git *);
1051 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1052 extern void close_pack_windows(struct packed_git *);
1053 extern void unuse_pack(struct pack_window **);
1054 extern void free_pack_by_name(const char *);
1055 extern void clear_delta_base_cache(void);
1056 extern struct packed_git *add_packed_git(const char *, int, int);
1057 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1058 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1059 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1060 extern int is_pack_valid(struct packed_git *);
1061 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1062 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1063 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1064 extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1065
1066 struct object_info {
1067 /* Request */
1068 unsigned long *sizep;
1069
1070 /* Response */
1071 enum {
1072 OI_CACHED,
1073 OI_LOOSE,
1074 OI_PACKED,
1075 OI_DBCACHED
1076 } whence;
1077 union {
1078 /*
1079 * struct {
1080 * ... Nothing to expose in this case
1081 * } cached;
1082 * struct {
1083 * ... Nothing to expose in this case
1084 * } loose;
1085 */
1086 struct {
1087 struct packed_git *pack;
1088 off_t offset;
1089 unsigned int is_delta;
1090 } packed;
1091 } u;
1092 };
1093 extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1094
1095 /* Dumb servers support */
1096 extern int update_server_info(int);
1097
1098 /* git_config_parse_key() returns these negated: */
1099 #define CONFIG_INVALID_KEY 1
1100 #define CONFIG_NO_SECTION_OR_NAME 2
1101 /* git_config_set(), git_config_set_multivar() return the above or these: */
1102 #define CONFIG_NO_LOCK -1
1103 #define CONFIG_INVALID_FILE 3
1104 #define CONFIG_NO_WRITE 4
1105 #define CONFIG_NOTHING_SET 5
1106 #define CONFIG_INVALID_PATTERN 6
1107
1108 typedef int (*config_fn_t)(const char *, const char *, void *);
1109 extern int git_default_config(const char *, const char *, void *);
1110 extern int git_config_from_file(config_fn_t fn, const char *, void *);
1111 extern void git_config_push_parameter(const char *text);
1112 extern int git_config_from_parameters(config_fn_t fn, void *data);
1113 extern int git_config(config_fn_t fn, void *);
1114 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1115 extern int git_parse_ulong(const char *, unsigned long *);
1116 extern int git_config_int(const char *, const char *);
1117 extern unsigned long git_config_ulong(const char *, const char *);
1118 extern int git_config_bool_or_int(const char *, const char *, int *);
1119 extern int git_config_bool(const char *, const char *);
1120 extern int git_config_maybe_bool(const char *, const char *);
1121 extern int git_config_string(const char **, const char *, const char *);
1122 extern int git_config_pathname(const char **, const char *, const char *);
1123 extern int git_config_set_in_file(const char *, const char *, const char *);
1124 extern int git_config_set(const char *, const char *);
1125 extern int git_config_parse_key(const char *, char **, int *);
1126 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1127 extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1128 extern int git_config_rename_section(const char *, const char *);
1129 extern const char *git_etc_gitconfig(void);
1130 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1131 extern int git_env_bool(const char *, int);
1132 extern int git_config_system(void);
1133 extern int config_error_nonbool(const char *);
1134 extern const char *get_log_output_encoding(void);
1135 extern const char *get_commit_output_encoding(void);
1136
1137 extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1138
1139 extern const char *config_exclusive_filename;
1140
1141 #define MAX_GITNAME (1000)
1142 extern char git_default_email[MAX_GITNAME];
1143 extern char git_default_name[MAX_GITNAME];
1144 #define IDENT_NAME_GIVEN 01
1145 #define IDENT_MAIL_GIVEN 02
1146 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1147 extern int user_ident_explicitly_given;
1148 extern int user_ident_sufficiently_given(void);
1149
1150 extern const char *git_commit_encoding;
1151 extern const char *git_log_output_encoding;
1152 extern const char *git_mailmap_file;
1153
1154 /* IO helper functions */
1155 extern void maybe_flush_or_die(FILE *, const char *);
1156 extern int copy_fd(int ifd, int ofd);
1157 extern int copy_file(const char *dst, const char *src, int mode);
1158 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1159 extern void write_or_die(int fd, const void *buf, size_t count);
1160 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1161 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1162 extern void fsync_or_die(int fd, const char *);
1163
1164 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1165 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1166 static inline ssize_t write_str_in_full(int fd, const char *str)
1167 {
1168 return write_in_full(fd, str, strlen(str));
1169 }
1170
1171 /* pager.c */
1172 extern void setup_pager(void);
1173 extern const char *pager_program;
1174 extern int pager_in_use(void);
1175 extern int pager_use_color;
1176
1177 extern const char *editor_program;
1178 extern const char *askpass_program;
1179 extern const char *excludes_file;
1180
1181 /* base85 */
1182 int decode_85(char *dst, const char *line, int linelen);
1183 void encode_85(char *buf, const unsigned char *data, int bytes);
1184
1185 /* alloc.c */
1186 extern void *alloc_blob_node(void);
1187 extern void *alloc_tree_node(void);
1188 extern void *alloc_commit_node(void);
1189 extern void *alloc_tag_node(void);
1190 extern void *alloc_object_node(void);
1191 extern void alloc_report(void);
1192
1193 /* trace.c */
1194 __attribute__((format (printf, 1, 2)))
1195 extern void trace_printf(const char *format, ...);
1196 extern void trace_vprintf(const char *key, const char *format, va_list ap);
1197 __attribute__((format (printf, 2, 3)))
1198 extern void trace_argv_printf(const char **argv, const char *format, ...);
1199 extern void trace_repo_setup(const char *prefix);
1200 extern int trace_want(const char *key);
1201 extern void trace_strbuf(const char *key, const struct strbuf *buf);
1202
1203 void packet_trace_identity(const char *prog);
1204
1205 /* add */
1206 /*
1207 * return 0 if success, 1 - if addition of a file failed and
1208 * ADD_FILES_IGNORE_ERRORS was specified in flags
1209 */
1210 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1211
1212 /* diff.c */
1213 extern int diff_auto_refresh_index;
1214
1215 /* match-trees.c */
1216 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1217 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1218
1219 /*
1220 * whitespace rules.
1221 * used by both diff and apply
1222 * last two digits are tab width
1223 */
1224 #define WS_BLANK_AT_EOL 0100
1225 #define WS_SPACE_BEFORE_TAB 0200
1226 #define WS_INDENT_WITH_NON_TAB 0400
1227 #define WS_CR_AT_EOL 01000
1228 #define WS_BLANK_AT_EOF 02000
1229 #define WS_TAB_IN_INDENT 04000
1230 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1231 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1232 #define WS_TAB_WIDTH_MASK 077
1233 extern unsigned whitespace_rule_cfg;
1234 extern unsigned whitespace_rule(const char *);
1235 extern unsigned parse_whitespace_rule(const char *);
1236 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1237 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1238 extern char *whitespace_error_string(unsigned ws);
1239 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1240 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1241 #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1242
1243 /* ls-files */
1244 int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1245 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1246
1247 char *alias_lookup(const char *alias);
1248 int split_cmdline(char *cmdline, const char ***argv);
1249 /* Takes a negative value returned by split_cmdline */
1250 const char *split_cmdline_strerror(int cmdline_errno);
1251
1252 /* git.c */
1253 struct startup_info {
1254 int have_repository;
1255 const char *prefix;
1256 };
1257 extern struct startup_info *startup_info;
1258
1259 /* builtin/merge.c */
1260 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1261
1262 #endif /* CACHE_H */