Merge branch 'maint-1.8.1' into maint-1.8.2
[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_abort(git_zstream *);
39 int git_deflate_end_gently(git_zstream *);
40 int git_deflate(git_zstream *, int flush);
41 unsigned long git_deflate_bound(git_zstream *, unsigned long);
42
43 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
44 #define DTYPE(de) ((de)->d_type)
45 #else
46 #undef DT_UNKNOWN
47 #undef DT_DIR
48 #undef DT_REG
49 #undef DT_LNK
50 #define DT_UNKNOWN 0
51 #define DT_DIR 1
52 #define DT_REG 2
53 #define DT_LNK 3
54 #define DTYPE(de) DT_UNKNOWN
55 #endif
56
57 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
58 #define S_IFINVALID 0030000
59
60 /*
61 * A "directory link" is a link to another git directory.
62 *
63 * The value 0160000 is not normally a valid mode, and
64 * also just happens to be S_IFDIR + S_IFLNK
65 *
66 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
67 * always having the same values everywhere. We should use
68 * our internal git values for these things, and then we can
69 * translate that to the OS-specific value. It just so
70 * happens that everybody shares the same bit representation
71 * in the UNIX world (and apparently wider too..)
72 */
73 #define S_IFGITLINK 0160000
74 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
75
76 /*
77 * Intensive research over the course of many years has shown that
78 * port 9418 is totally unused by anything else. Or
79 *
80 * Your search - "port 9418" - did not match any documents.
81 *
82 * as www.google.com puts it.
83 *
84 * This port has been properly assigned for git use by IANA:
85 * git (Assigned-9418) [I06-050728-0001].
86 *
87 * git 9418/tcp git pack transfer service
88 * git 9418/udp git pack transfer service
89 *
90 * with Linus Torvalds <torvalds@osdl.org> as the point of
91 * contact. September 2005.
92 *
93 * See http://www.iana.org/assignments/port-numbers
94 */
95 #define DEFAULT_GIT_PORT 9418
96
97 /*
98 * Basic data structures for the directory cache
99 */
100
101 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
102 struct cache_header {
103 unsigned int hdr_signature;
104 unsigned int hdr_version;
105 unsigned int hdr_entries;
106 };
107
108 #define INDEX_FORMAT_LB 2
109 #define INDEX_FORMAT_UB 4
110
111 /*
112 * The "cache_time" is just the low 32 bits of the
113 * time. It doesn't matter if it overflows - we only
114 * check it for equality in the 32 bits we save.
115 */
116 struct cache_time {
117 unsigned int sec;
118 unsigned int nsec;
119 };
120
121 struct cache_entry {
122 struct cache_time ce_ctime;
123 struct cache_time ce_mtime;
124 unsigned int ce_dev;
125 unsigned int ce_ino;
126 unsigned int ce_mode;
127 unsigned int ce_uid;
128 unsigned int ce_gid;
129 unsigned int ce_size;
130 unsigned int ce_flags;
131 unsigned int ce_namelen;
132 unsigned char sha1[20];
133 struct cache_entry *next;
134 char name[FLEX_ARRAY]; /* more */
135 };
136
137 #define CE_STAGEMASK (0x3000)
138 #define CE_EXTENDED (0x4000)
139 #define CE_VALID (0x8000)
140 #define CE_STAGESHIFT 12
141
142 /*
143 * Range 0xFFFF0000 in ce_flags is divided into
144 * two parts: in-memory flags and on-disk ones.
145 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
146 * if you want to save a new flag, add it in
147 * CE_EXTENDED_FLAGS
148 *
149 * In-memory only flags
150 */
151 #define CE_UPDATE (1 << 16)
152 #define CE_REMOVE (1 << 17)
153 #define CE_UPTODATE (1 << 18)
154 #define CE_ADDED (1 << 19)
155
156 #define CE_HASHED (1 << 20)
157 #define CE_UNHASHED (1 << 21)
158 #define CE_WT_REMOVE (1 << 22) /* remove in work directory */
159 #define CE_CONFLICTED (1 << 23)
160
161 #define CE_UNPACKED (1 << 24)
162 #define CE_NEW_SKIP_WORKTREE (1 << 25)
163
164 /*
165 * Extended on-disk flags
166 */
167 #define CE_INTENT_TO_ADD (1 << 29)
168 #define CE_SKIP_WORKTREE (1 << 30)
169 /* CE_EXTENDED2 is for future extension */
170 #define CE_EXTENDED2 (1 << 31)
171
172 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
173
174 /*
175 * Safeguard to avoid saving wrong flags:
176 * - CE_EXTENDED2 won't get saved until its semantic is known
177 * - Bits in 0x0000FFFF have been saved in ce_flags already
178 * - Bits in 0x003F0000 are currently in-memory flags
179 */
180 #if CE_EXTENDED_FLAGS & 0x803FFFFF
181 #error "CE_EXTENDED_FLAGS out of range"
182 #endif
183
184 /*
185 * Copy the sha1 and stat state of a cache entry from one to
186 * another. But we never change the name, or the hash state!
187 */
188 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
189 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
190 {
191 unsigned int state = dst->ce_flags & CE_STATE_MASK;
192
193 /* Don't copy hash chain and name */
194 memcpy(dst, src, offsetof(struct cache_entry, next));
195
196 /* Restore the hash state */
197 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
198 }
199
200 static inline unsigned create_ce_flags(unsigned stage)
201 {
202 return (stage << CE_STAGESHIFT);
203 }
204
205 #define ce_namelen(ce) ((ce)->ce_namelen)
206 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
207 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
208 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
209 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
210 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
211
212 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
213 static inline unsigned int create_ce_mode(unsigned int mode)
214 {
215 if (S_ISLNK(mode))
216 return S_IFLNK;
217 if (S_ISDIR(mode) || S_ISGITLINK(mode))
218 return S_IFGITLINK;
219 return S_IFREG | ce_permissions(mode);
220 }
221 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
222 {
223 extern int trust_executable_bit, has_symlinks;
224 if (!has_symlinks && S_ISREG(mode) &&
225 ce && S_ISLNK(ce->ce_mode))
226 return ce->ce_mode;
227 if (!trust_executable_bit && S_ISREG(mode)) {
228 if (ce && S_ISREG(ce->ce_mode))
229 return ce->ce_mode;
230 return create_ce_mode(0666);
231 }
232 return create_ce_mode(mode);
233 }
234 static inline int ce_to_dtype(const struct cache_entry *ce)
235 {
236 unsigned ce_mode = ntohl(ce->ce_mode);
237 if (S_ISREG(ce_mode))
238 return DT_REG;
239 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
240 return DT_DIR;
241 else if (S_ISLNK(ce_mode))
242 return DT_LNK;
243 else
244 return DT_UNKNOWN;
245 }
246 static inline unsigned int canon_mode(unsigned int mode)
247 {
248 if (S_ISREG(mode))
249 return S_IFREG | ce_permissions(mode);
250 if (S_ISLNK(mode))
251 return S_IFLNK;
252 if (S_ISDIR(mode))
253 return S_IFDIR;
254 return S_IFGITLINK;
255 }
256
257 #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
258
259 struct index_state {
260 struct cache_entry **cache;
261 unsigned int version;
262 unsigned int cache_nr, cache_alloc, cache_changed;
263 struct string_list *resolve_undo;
264 struct cache_tree *cache_tree;
265 struct cache_time timestamp;
266 unsigned name_hash_initialized : 1,
267 initialized : 1;
268 struct hash_table name_hash;
269 struct hash_table dir_hash;
270 };
271
272 extern struct index_state the_index;
273
274 /* Name hashing */
275 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
276 extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
277 extern void free_name_hash(struct index_state *istate);
278
279
280 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
281 #define active_cache (the_index.cache)
282 #define active_nr (the_index.cache_nr)
283 #define active_alloc (the_index.cache_alloc)
284 #define active_cache_changed (the_index.cache_changed)
285 #define active_cache_tree (the_index.cache_tree)
286
287 #define read_cache() read_index(&the_index)
288 #define read_cache_from(path) read_index_from(&the_index, (path))
289 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
290 #define is_cache_unborn() is_index_unborn(&the_index)
291 #define read_cache_unmerged() read_index_unmerged(&the_index)
292 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
293 #define discard_cache() discard_index(&the_index)
294 #define unmerged_cache() unmerged_index(&the_index)
295 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
296 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
297 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
298 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
299 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
300 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
301 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
302 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
303 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
304 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
305 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
306 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
307 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
308 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
309 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
310 #endif
311
312 enum object_type {
313 OBJ_BAD = -1,
314 OBJ_NONE = 0,
315 OBJ_COMMIT = 1,
316 OBJ_TREE = 2,
317 OBJ_BLOB = 3,
318 OBJ_TAG = 4,
319 /* 5 for future expansion */
320 OBJ_OFS_DELTA = 6,
321 OBJ_REF_DELTA = 7,
322 OBJ_ANY,
323 OBJ_MAX
324 };
325
326 static inline enum object_type object_type(unsigned int mode)
327 {
328 return S_ISDIR(mode) ? OBJ_TREE :
329 S_ISGITLINK(mode) ? OBJ_COMMIT :
330 OBJ_BLOB;
331 }
332
333 /* Double-check local_repo_env below if you add to this list. */
334 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
335 #define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
336 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
337 #define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
338 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
339 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
340 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
341 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
342 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
343 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
344 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
345 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
346 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
347 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
348 #define GITATTRIBUTES_FILE ".gitattributes"
349 #define INFOATTRIBUTES_FILE "info/attributes"
350 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
351 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
352 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
353 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
354 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
355 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
356 #define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS"
357
358 /*
359 * This environment variable is expected to contain a boolean indicating
360 * whether we should or should not treat:
361 *
362 * GIT_DIR=foo.git git ...
363 *
364 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use
365 * of this, but we use it internally to communicate to sub-processes that we
366 * are in a bare repo. If not set, defaults to true.
367 */
368 #define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
369
370 /*
371 * Repository-local GIT_* environment variables; these will be cleared
372 * when git spawns a sub-process that runs inside another repository.
373 * The array is NULL-terminated, which makes it easy to pass in the "env"
374 * parameter of a run-command invocation, or to do a simple walk.
375 */
376 extern const char * const local_repo_env[];
377
378 extern int is_bare_repository_cfg;
379 extern int is_bare_repository(void);
380 extern int is_inside_git_dir(void);
381 extern char *git_work_tree_cfg;
382 extern int is_inside_work_tree(void);
383 extern int have_git_dir(void);
384 extern const char *get_git_dir(void);
385 extern int is_git_directory(const char *path);
386 extern char *get_object_directory(void);
387 extern char *get_index_file(void);
388 extern char *get_graft_file(void);
389 extern int set_git_dir(const char *path);
390 extern const char *get_git_namespace(void);
391 extern const char *strip_namespace(const char *namespaced_ref);
392 extern const char *get_git_work_tree(void);
393 extern const char *read_gitfile(const char *path);
394 extern const char *resolve_gitdir(const char *suspect);
395 extern void set_git_work_tree(const char *tree);
396
397 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
398
399 extern const char **get_pathspec(const char *prefix, const char **pathspec);
400 extern void setup_work_tree(void);
401 extern const char *setup_git_directory_gently(int *);
402 extern const char *setup_git_directory(void);
403 extern char *prefix_path(const char *prefix, int len, const char *path);
404 extern const char *prefix_filename(const char *prefix, int len, const char *path);
405 extern int check_filename(const char *prefix, const char *name);
406 extern void verify_filename(const char *prefix,
407 const char *name,
408 int diagnose_misspelt_rev);
409 extern void verify_non_filename(const char *prefix, const char *name);
410 extern int path_inside_repo(const char *prefix, const char *path);
411
412 #define INIT_DB_QUIET 0x0001
413
414 extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
415 extern int init_db(const char *template_dir, unsigned int flags);
416
417 #define alloc_nr(x) (((x)+16)*3/2)
418
419 /*
420 * Realloc the buffer pointed at by variable 'x' so that it can hold
421 * at least 'nr' entries; the number of entries currently allocated
422 * is 'alloc', using the standard growing factor alloc_nr() macro.
423 *
424 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
425 */
426 #define ALLOC_GROW(x, nr, alloc) \
427 do { \
428 if ((nr) > alloc) { \
429 if (alloc_nr(alloc) < (nr)) \
430 alloc = (nr); \
431 else \
432 alloc = alloc_nr(alloc); \
433 x = xrealloc((x), alloc * sizeof(*(x))); \
434 } \
435 } while (0)
436
437 /* Initialize and use the cache information */
438 extern int read_index(struct index_state *);
439 extern int read_index_preload(struct index_state *, const char **pathspec);
440 extern int read_index_from(struct index_state *, const char *path);
441 extern int is_index_unborn(struct index_state *);
442 extern int read_index_unmerged(struct index_state *);
443 extern int write_index(struct index_state *, int newfd);
444 extern int discard_index(struct index_state *);
445 extern int unmerged_index(const struct index_state *);
446 extern int verify_path(const char *path);
447 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
448 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
449 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
450 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
451 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
452 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
453 #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
454 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
455 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
456 extern int remove_index_entry_at(struct index_state *, int pos);
457 extern void remove_marked_cache_entries(struct index_state *istate);
458 extern int remove_file_from_index(struct index_state *, const char *path);
459 #define ADD_CACHE_VERBOSE 1
460 #define ADD_CACHE_PRETEND 2
461 #define ADD_CACHE_IGNORE_ERRORS 4
462 #define ADD_CACHE_IGNORE_REMOVAL 8
463 #define ADD_CACHE_INTENT 16
464 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
465 extern int add_file_to_index(struct index_state *, const char *path, int flags);
466 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
467 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
468 extern int index_name_is_other(const struct index_state *, const char *, int);
469
470 /* do stat comparison even if CE_VALID is true */
471 #define CE_MATCH_IGNORE_VALID 01
472 /* do not check the contents but report dirty on racily-clean entries */
473 #define CE_MATCH_RACY_IS_DIRTY 02
474 /* do stat comparison even if CE_SKIP_WORKTREE is true */
475 #define CE_MATCH_IGNORE_SKIP_WORKTREE 04
476 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
477 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
478
479 #define PATHSPEC_ONESTAR 1 /* the pathspec pattern sastisfies GFNM_ONESTAR */
480
481 struct pathspec {
482 const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
483 int nr;
484 unsigned int has_wildcard:1;
485 unsigned int recursive:1;
486 int max_depth;
487 struct pathspec_item {
488 const char *match;
489 int len;
490 int nowildcard_len;
491 int flags;
492 } *items;
493 };
494
495 extern int init_pathspec(struct pathspec *, const char **);
496 extern void free_pathspec(struct pathspec *);
497 extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
498
499 extern int limit_pathspec_to_literal(void);
500
501 #define HASH_WRITE_OBJECT 1
502 #define HASH_FORMAT_CHECK 2
503 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
504 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
505 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
506
507 #define REFRESH_REALLY 0x0001 /* ignore_valid */
508 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
509 #define REFRESH_QUIET 0x0004 /* be quiet about it */
510 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
511 #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
512 #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
513 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
514
515 struct lock_file {
516 struct lock_file *next;
517 int fd;
518 pid_t owner;
519 char on_list;
520 char filename[PATH_MAX];
521 };
522 #define LOCK_DIE_ON_ERROR 1
523 #define LOCK_NODEREF 2
524 extern int unable_to_lock_error(const char *path, int err);
525 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
526 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
527 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
528 extern int commit_lock_file(struct lock_file *);
529 extern void update_index_if_able(struct index_state *, struct lock_file *);
530
531 extern int hold_locked_index(struct lock_file *, int);
532 extern int commit_locked_index(struct lock_file *);
533 extern void set_alternate_index_output(const char *);
534 extern int close_lock_file(struct lock_file *);
535 extern void rollback_lock_file(struct lock_file *);
536 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
537
538 /* Environment bits from configuration mechanism */
539 extern int trust_executable_bit;
540 extern int trust_ctime;
541 extern int check_stat;
542 extern int quote_path_fully;
543 extern int has_symlinks;
544 extern int minimum_abbrev, default_abbrev;
545 extern int ignore_case;
546 extern int assume_unchanged;
547 extern int prefer_symlink_refs;
548 extern int log_all_ref_updates;
549 extern int warn_ambiguous_refs;
550 extern int shared_repository;
551 extern const char *apply_default_whitespace;
552 extern const char *apply_default_ignorewhitespace;
553 extern const char *git_attributes_file;
554 extern int zlib_compression_level;
555 extern int core_compression_level;
556 extern int core_compression_seen;
557 extern size_t packed_git_window_size;
558 extern size_t packed_git_limit;
559 extern size_t delta_base_cache_limit;
560 extern unsigned long big_file_threshold;
561 extern unsigned long pack_size_limit_cfg;
562 extern int read_replace_refs;
563 extern int fsync_object_files;
564 extern int core_preload_index;
565 extern int core_apply_sparse_checkout;
566 extern int precomposed_unicode;
567
568 /*
569 * The character that begins a commented line in user-editable file
570 * that is subject to stripspace.
571 */
572 extern char comment_line_char;
573
574 enum branch_track {
575 BRANCH_TRACK_UNSPECIFIED = -1,
576 BRANCH_TRACK_NEVER = 0,
577 BRANCH_TRACK_REMOTE,
578 BRANCH_TRACK_ALWAYS,
579 BRANCH_TRACK_EXPLICIT,
580 BRANCH_TRACK_OVERRIDE
581 };
582
583 enum rebase_setup_type {
584 AUTOREBASE_NEVER = 0,
585 AUTOREBASE_LOCAL,
586 AUTOREBASE_REMOTE,
587 AUTOREBASE_ALWAYS
588 };
589
590 enum push_default_type {
591 PUSH_DEFAULT_NOTHING = 0,
592 PUSH_DEFAULT_MATCHING,
593 PUSH_DEFAULT_SIMPLE,
594 PUSH_DEFAULT_UPSTREAM,
595 PUSH_DEFAULT_CURRENT,
596 PUSH_DEFAULT_UNSPECIFIED
597 };
598
599 extern enum branch_track git_branch_track;
600 extern enum rebase_setup_type autorebase;
601 extern enum push_default_type push_default;
602
603 enum object_creation_mode {
604 OBJECT_CREATION_USES_HARDLINKS = 0,
605 OBJECT_CREATION_USES_RENAMES = 1
606 };
607
608 extern enum object_creation_mode object_creation_mode;
609
610 extern char *notes_ref_name;
611
612 extern int grafts_replace_parents;
613
614 #define GIT_REPO_VERSION 0
615 extern int repository_format_version;
616 extern int check_repository_format(void);
617
618 #define MTIME_CHANGED 0x0001
619 #define CTIME_CHANGED 0x0002
620 #define OWNER_CHANGED 0x0004
621 #define MODE_CHANGED 0x0008
622 #define INODE_CHANGED 0x0010
623 #define DATA_CHANGED 0x0020
624 #define TYPE_CHANGED 0x0040
625
626 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
627 __attribute__((format (printf, 3, 4)));
628 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
629 __attribute__((format (printf, 3, 4)));
630 extern char *git_pathdup(const char *fmt, ...)
631 __attribute__((format (printf, 1, 2)));
632 extern char *mkpathdup(const char *fmt, ...)
633 __attribute__((format (printf, 1, 2)));
634
635 /* Return a statically allocated filename matching the sha1 signature */
636 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
637 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
638 extern char *git_path_submodule(const char *path, const char *fmt, ...)
639 __attribute__((format (printf, 2, 3)));
640
641 extern char *sha1_file_name(const unsigned char *sha1);
642 extern char *sha1_pack_name(const unsigned char *sha1);
643 extern char *sha1_pack_index_name(const unsigned char *sha1);
644 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
645 extern const unsigned char null_sha1[20];
646
647 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
648 {
649 int i;
650
651 for (i = 0; i < 20; i++, sha1++, sha2++) {
652 if (*sha1 != *sha2)
653 return *sha1 - *sha2;
654 }
655
656 return 0;
657 }
658
659 static inline int is_null_sha1(const unsigned char *sha1)
660 {
661 return !hashcmp(sha1, null_sha1);
662 }
663
664 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
665 {
666 memcpy(sha_dst, sha_src, 20);
667 }
668 static inline void hashclr(unsigned char *hash)
669 {
670 memset(hash, 0, 20);
671 }
672
673 #define EMPTY_TREE_SHA1_HEX \
674 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
675 #define EMPTY_TREE_SHA1_BIN_LITERAL \
676 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
677 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
678 #define EMPTY_TREE_SHA1_BIN \
679 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
680
681 #define EMPTY_BLOB_SHA1_HEX \
682 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
683 #define EMPTY_BLOB_SHA1_BIN_LITERAL \
684 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
685 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
686 #define EMPTY_BLOB_SHA1_BIN \
687 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
688
689 static inline int is_empty_blob_sha1(const unsigned char *sha1)
690 {
691 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
692 }
693
694 int git_mkstemp(char *path, size_t n, const char *template);
695
696 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
697
698 /* set default permissions by passing mode arguments to open(2) */
699 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
700 int git_mkstemp_mode(char *pattern, int mode);
701
702 /*
703 * NOTE NOTE NOTE!!
704 *
705 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
706 * not be changed. Old repositories have core.sharedrepository written in
707 * numeric format, and therefore these values are preserved for compatibility
708 * reasons.
709 */
710 enum sharedrepo {
711 PERM_UMASK = 0,
712 OLD_PERM_GROUP = 1,
713 OLD_PERM_EVERYBODY = 2,
714 PERM_GROUP = 0660,
715 PERM_EVERYBODY = 0664
716 };
717 int git_config_perm(const char *var, const char *value);
718 int set_shared_perm(const char *path, int mode);
719 #define adjust_shared_perm(path) set_shared_perm((path), 0)
720 int safe_create_leading_directories(char *path);
721 int safe_create_leading_directories_const(const char *path);
722 int mkdir_in_gitdir(const char *path);
723 extern void home_config_paths(char **global, char **xdg, char *file);
724 extern char *expand_user_path(const char *path);
725 const char *enter_repo(const char *path, int strict);
726 static inline int is_absolute_path(const char *path)
727 {
728 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
729 }
730 int is_directory(const char *);
731 const char *real_path(const char *path);
732 const char *real_path_if_valid(const char *path);
733 const char *absolute_path(const char *path);
734 const char *relative_path(const char *abs, const char *base);
735 int normalize_path_copy(char *dst, const char *src);
736 int longest_ancestor_length(const char *path, struct string_list *prefixes);
737 char *strip_path_suffix(const char *path, const char *suffix);
738 int daemon_avoid_alias(const char *path);
739 int offset_1st_component(const char *path);
740
741 /* object replacement */
742 #define READ_SHA1_FILE_REPLACE 1
743 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
744 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
745 {
746 return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
747 }
748 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
749 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
750 {
751 if (!read_replace_refs)
752 return sha1;
753 return do_lookup_replace_object(sha1);
754 }
755
756 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
757 extern int sha1_object_info(const unsigned char *, unsigned long *);
758 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
759 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
760 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
761 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
762 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
763 extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
764 extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
765
766 /* global flag to enable extra checks when accessing packed objects */
767 extern int do_check_packed_object_crc;
768
769 /* for development: log offset of pack access */
770 extern const char *log_pack_access;
771
772 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
773
774 extern int move_temp_to_file(const char *tmpfile, const char *filename);
775
776 extern int has_sha1_pack(const unsigned char *sha1);
777 extern int has_sha1_file(const unsigned char *sha1);
778 extern int has_loose_object_nonlocal(const unsigned char *sha1);
779
780 extern int has_pack_index(const unsigned char *sha1);
781
782 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
783
784 extern const signed char hexval_table[256];
785 static inline unsigned int hexval(unsigned char c)
786 {
787 return hexval_table[c];
788 }
789
790 /* Convert to/from hex/sha1 representation */
791 #define MINIMUM_ABBREV minimum_abbrev
792 #define DEFAULT_ABBREV default_abbrev
793
794 struct object_context {
795 unsigned char tree[20];
796 char path[PATH_MAX];
797 unsigned mode;
798 };
799
800 #define GET_SHA1_QUIETLY 01
801 #define GET_SHA1_COMMIT 02
802 #define GET_SHA1_COMMITTISH 04
803 #define GET_SHA1_TREE 010
804 #define GET_SHA1_TREEISH 020
805 #define GET_SHA1_BLOB 040
806 #define GET_SHA1_ONLY_TO_DIE 04000
807
808 extern int get_sha1(const char *str, unsigned char *sha1);
809 extern int get_sha1_commit(const char *str, unsigned char *sha1);
810 extern int get_sha1_committish(const char *str, unsigned char *sha1);
811 extern int get_sha1_tree(const char *str, unsigned char *sha1);
812 extern int get_sha1_treeish(const char *str, unsigned char *sha1);
813 extern int get_sha1_blob(const char *str, unsigned char *sha1);
814 extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
815 extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);
816
817 typedef int each_abbrev_fn(const unsigned char *sha1, void *);
818 extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
819
820 /*
821 * Try to read a SHA1 in hexadecimal format from the 40 characters
822 * starting at hex. Write the 20-byte result to sha1 in binary form.
823 * Return 0 on success. Reading stops if a NUL is encountered in the
824 * input, so it is safe to pass this function an arbitrary
825 * null-terminated string.
826 */
827 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
828
829 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
830 extern int read_ref_full(const char *refname, unsigned char *sha1,
831 int reading, int *flags);
832 extern int read_ref(const char *refname, unsigned char *sha1);
833
834 /*
835 * Resolve a reference, recursively following symbolic refererences.
836 *
837 * Store the referred-to object's name in sha1 and return the name of
838 * the non-symbolic reference that ultimately pointed at it. The
839 * return value, if not NULL, is a pointer into either a static buffer
840 * or the input ref.
841 *
842 * If the reference cannot be resolved to an object, the behavior
843 * depends on the "reading" argument:
844 *
845 * - If reading is set, return NULL.
846 *
847 * - If reading is not set, clear sha1 and return the name of the last
848 * reference name in the chain, which will either be a non-symbolic
849 * reference or an undefined reference. If this is a prelude to
850 * "writing" to the ref, the return value is the name of the ref
851 * that will actually be created or changed.
852 *
853 * If flag is non-NULL, set the value that it points to the
854 * combination of REF_ISPACKED (if the reference was found among the
855 * packed references) and REF_ISSYMREF (if the initial reference was a
856 * symbolic reference).
857 *
858 * If ref is not a properly-formatted, normalized reference, return
859 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
860 * give up and return NULL.
861 *
862 * errno is sometimes set on errors, but not always.
863 */
864 extern const char *resolve_ref_unsafe(const char *ref, unsigned char *sha1, int reading, int *flag);
865 extern char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag);
866
867 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
868 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
869 extern int interpret_branch_name(const char *str, struct strbuf *);
870 extern int get_sha1_mb(const char *str, unsigned char *sha1);
871
872 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
873 extern const char *ref_rev_parse_rules[];
874 #define ref_fetch_rules ref_rev_parse_rules
875
876 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
877 extern int validate_headref(const char *ref);
878
879 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
880 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
881 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
882 extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
883
884 extern void *read_object_with_reference(const unsigned char *sha1,
885 const char *required_type,
886 unsigned long *size,
887 unsigned char *sha1_ret);
888
889 extern struct object *peel_to_type(const char *name, int namelen,
890 struct object *o, enum object_type);
891
892 enum date_mode {
893 DATE_NORMAL = 0,
894 DATE_RELATIVE,
895 DATE_SHORT,
896 DATE_LOCAL,
897 DATE_ISO8601,
898 DATE_RFC2822,
899 DATE_RAW
900 };
901
902 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
903 void show_date_relative(unsigned long time, int tz, const struct timeval *now,
904 struct strbuf *timebuf);
905 int parse_date(const char *date, char *buf, int bufsize);
906 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
907 void datestamp(char *buf, int bufsize);
908 #define approxidate(s) approxidate_careful((s), NULL)
909 unsigned long approxidate_careful(const char *, int *);
910 unsigned long approxidate_relative(const char *date, const struct timeval *now);
911 enum date_mode parse_date_format(const char *format);
912
913 #define IDENT_STRICT 1
914 #define IDENT_NO_DATE 2
915 #define IDENT_NO_NAME 4
916 extern const char *git_author_info(int);
917 extern const char *git_committer_info(int);
918 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
919 extern const char *fmt_name(const char *name, const char *email);
920 extern const char *ident_default_email(void);
921 extern const char *git_editor(void);
922 extern const char *git_pager(int stdout_is_tty);
923 extern int git_ident_config(const char *, const char *, void *);
924
925 struct ident_split {
926 const char *name_begin;
927 const char *name_end;
928 const char *mail_begin;
929 const char *mail_end;
930 const char *date_begin;
931 const char *date_end;
932 const char *tz_begin;
933 const char *tz_end;
934 };
935 /*
936 * Signals an success with 0, but time part of the result may be NULL
937 * if the input lacks timestamp and zone
938 */
939 extern int split_ident_line(struct ident_split *, const char *, int);
940
941 struct checkout {
942 const char *base_dir;
943 int base_dir_len;
944 unsigned force:1,
945 quiet:1,
946 not_new:1,
947 refresh_cache:1;
948 };
949
950 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
951
952 struct cache_def {
953 char path[PATH_MAX + 1];
954 int len;
955 int flags;
956 int track_flags;
957 int prefix_len_stat_func;
958 };
959
960 extern int has_symlink_leading_path(const char *name, int len);
961 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
962 extern int check_leading_path(const char *name, int len);
963 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
964 extern void schedule_dir_for_removal(const char *name, int len);
965 extern void remove_scheduled_dirs(void);
966
967 extern struct alternate_object_database {
968 struct alternate_object_database *next;
969 char *name;
970 char base[FLEX_ARRAY]; /* more */
971 } *alt_odb_list;
972 extern void prepare_alt_odb(void);
973 extern void read_info_alternates(const char * relative_base, int depth);
974 extern void add_to_alternates_file(const char *reference);
975 typedef int alt_odb_fn(struct alternate_object_database *, void *);
976 extern void foreach_alt_odb(alt_odb_fn, void*);
977
978 struct pack_window {
979 struct pack_window *next;
980 unsigned char *base;
981 off_t offset;
982 size_t len;
983 unsigned int last_used;
984 unsigned int inuse_cnt;
985 };
986
987 extern struct packed_git {
988 struct packed_git *next;
989 struct pack_window *windows;
990 off_t pack_size;
991 const void *index_data;
992 size_t index_size;
993 uint32_t num_objects;
994 uint32_t num_bad_objects;
995 unsigned char *bad_object_sha1;
996 int index_version;
997 time_t mtime;
998 int pack_fd;
999 unsigned pack_local:1,
1000 pack_keep:1,
1001 do_not_close:1;
1002 unsigned char sha1[20];
1003 /* something like ".git/objects/pack/xxxxx.pack" */
1004 char pack_name[FLEX_ARRAY]; /* more */
1005 } *packed_git;
1006
1007 struct pack_entry {
1008 off_t offset;
1009 unsigned char sha1[20];
1010 struct packed_git *p;
1011 };
1012
1013 struct ref {
1014 struct ref *next;
1015 unsigned char old_sha1[20];
1016 unsigned char new_sha1[20];
1017 char *symref;
1018 unsigned int
1019 force:1,
1020 forced_update:1,
1021 merge:1,
1022 deletion:1;
1023 enum {
1024 REF_STATUS_NONE = 0,
1025 REF_STATUS_OK,
1026 REF_STATUS_REJECT_NONFASTFORWARD,
1027 REF_STATUS_REJECT_ALREADY_EXISTS,
1028 REF_STATUS_REJECT_NODELETE,
1029 REF_STATUS_REJECT_FETCH_FIRST,
1030 REF_STATUS_REJECT_NEEDS_FORCE,
1031 REF_STATUS_UPTODATE,
1032 REF_STATUS_REMOTE_REJECT,
1033 REF_STATUS_EXPECTING_REPORT
1034 } status;
1035 char *remote_status;
1036 struct ref *peer_ref; /* when renaming */
1037 char name[FLEX_ARRAY]; /* more */
1038 };
1039
1040 #define REF_NORMAL (1u << 0)
1041 #define REF_HEADS (1u << 1)
1042 #define REF_TAGS (1u << 2)
1043
1044 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
1045
1046 #define CONNECT_VERBOSE (1u << 0)
1047 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
1048 extern int finish_connect(struct child_process *conn);
1049 extern int git_connection_is_socket(struct child_process *conn);
1050 struct extra_have_objects {
1051 int nr, alloc;
1052 unsigned char (*array)[20];
1053 };
1054 extern struct ref **get_remote_heads(int in, struct ref **list, unsigned int flags, struct extra_have_objects *);
1055 extern int server_supports(const char *feature);
1056 extern int parse_feature_request(const char *features, const char *feature);
1057 extern const char *server_feature_value(const char *feature, int *len_ret);
1058 extern const char *parse_feature_value(const char *feature_list, const char *feature, int *len_ret);
1059
1060 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1061
1062 extern void prepare_packed_git(void);
1063 extern void reprepare_packed_git(void);
1064 extern void install_packed_git(struct packed_git *pack);
1065
1066 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1067 struct packed_git *packs);
1068
1069 extern void pack_report(void);
1070 extern int open_pack_index(struct packed_git *);
1071 extern void close_pack_index(struct packed_git *);
1072 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1073 extern void close_pack_windows(struct packed_git *);
1074 extern void unuse_pack(struct pack_window **);
1075 extern void free_pack_by_name(const char *);
1076 extern void clear_delta_base_cache(void);
1077 extern struct packed_git *add_packed_git(const char *, int, int);
1078 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1079 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1080 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1081 extern int is_pack_valid(struct packed_git *);
1082 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1083 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1084 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1085 extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1086
1087 struct object_info {
1088 /* Request */
1089 unsigned long *sizep;
1090
1091 /* Response */
1092 enum {
1093 OI_CACHED,
1094 OI_LOOSE,
1095 OI_PACKED,
1096 OI_DBCACHED
1097 } whence;
1098 union {
1099 /*
1100 * struct {
1101 * ... Nothing to expose in this case
1102 * } cached;
1103 * struct {
1104 * ... Nothing to expose in this case
1105 * } loose;
1106 */
1107 struct {
1108 struct packed_git *pack;
1109 off_t offset;
1110 unsigned int is_delta;
1111 } packed;
1112 } u;
1113 };
1114 extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1115
1116 /* Dumb servers support */
1117 extern int update_server_info(int);
1118
1119 /* git_config_parse_key() returns these negated: */
1120 #define CONFIG_INVALID_KEY 1
1121 #define CONFIG_NO_SECTION_OR_NAME 2
1122 /* git_config_set(), git_config_set_multivar() return the above or these: */
1123 #define CONFIG_NO_LOCK -1
1124 #define CONFIG_INVALID_FILE 3
1125 #define CONFIG_NO_WRITE 4
1126 #define CONFIG_NOTHING_SET 5
1127 #define CONFIG_INVALID_PATTERN 6
1128 #define CONFIG_GENERIC_ERROR 7
1129
1130 typedef int (*config_fn_t)(const char *, const char *, void *);
1131 extern int git_default_config(const char *, const char *, void *);
1132 extern int git_config_from_file(config_fn_t fn, const char *, void *);
1133 extern void git_config_push_parameter(const char *text);
1134 extern int git_config_from_parameters(config_fn_t fn, void *data);
1135 extern int git_config(config_fn_t fn, void *);
1136 extern int git_config_with_options(config_fn_t fn, void *,
1137 const char *filename, int respect_includes);
1138 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1139 extern int git_parse_ulong(const char *, unsigned long *);
1140 extern int git_config_int(const char *, const char *);
1141 extern unsigned long git_config_ulong(const char *, const char *);
1142 extern int git_config_bool_or_int(const char *, const char *, int *);
1143 extern int git_config_bool(const char *, const char *);
1144 extern int git_config_maybe_bool(const char *, const char *);
1145 extern int git_config_string(const char **, const char *, const char *);
1146 extern int git_config_pathname(const char **, const char *, const char *);
1147 extern int git_config_set_in_file(const char *, const char *, const char *);
1148 extern int git_config_set(const char *, const char *);
1149 extern int git_config_parse_key(const char *, char **, int *);
1150 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1151 extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1152 extern int git_config_rename_section(const char *, const char *);
1153 extern int git_config_rename_section_in_file(const char *, const char *, const char *);
1154 extern const char *git_etc_gitconfig(void);
1155 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1156 extern int git_env_bool(const char *, int);
1157 extern int git_config_system(void);
1158 extern int config_error_nonbool(const char *);
1159 #if defined(__GNUC__) && ! defined(__clang__)
1160 #define config_error_nonbool(s) (config_error_nonbool(s), -1)
1161 #endif
1162 extern const char *get_log_output_encoding(void);
1163 extern const char *get_commit_output_encoding(void);
1164
1165 extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1166
1167 struct config_include_data {
1168 int depth;
1169 config_fn_t fn;
1170 void *data;
1171 };
1172 #define CONFIG_INCLUDE_INIT { 0 }
1173 extern int git_config_include(const char *name, const char *value, void *data);
1174
1175 /*
1176 * Match and parse a config key of the form:
1177 *
1178 * section.(subsection.)?key
1179 *
1180 * (i.e., what gets handed to a config_fn_t). The caller provides the section;
1181 * we return -1 if it does not match, 0 otherwise. The subsection and key
1182 * out-parameters are filled by the function (and subsection is NULL if it is
1183 * missing).
1184 */
1185 extern int parse_config_key(const char *var,
1186 const char *section,
1187 const char **subsection, int *subsection_len,
1188 const char **key);
1189
1190 extern int committer_ident_sufficiently_given(void);
1191 extern int author_ident_sufficiently_given(void);
1192
1193 extern const char *git_commit_encoding;
1194 extern const char *git_log_output_encoding;
1195 extern const char *git_mailmap_file;
1196 extern const char *git_mailmap_blob;
1197
1198 /* IO helper functions */
1199 extern void maybe_flush_or_die(FILE *, const char *);
1200 extern int copy_fd(int ifd, int ofd);
1201 extern int copy_file(const char *dst, const char *src, int mode);
1202 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1203 extern void write_or_die(int fd, const void *buf, size_t count);
1204 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1205 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1206 extern void fsync_or_die(int fd, const char *);
1207
1208 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1209 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1210 static inline ssize_t write_str_in_full(int fd, const char *str)
1211 {
1212 return write_in_full(fd, str, strlen(str));
1213 }
1214
1215 /* pager.c */
1216 extern void setup_pager(void);
1217 extern const char *pager_program;
1218 extern int pager_in_use(void);
1219 extern int pager_use_color;
1220 extern int term_columns(void);
1221 extern int decimal_width(int);
1222 extern int check_pager_config(const char *cmd);
1223
1224 extern const char *editor_program;
1225 extern const char *askpass_program;
1226 extern const char *excludes_file;
1227
1228 /* base85 */
1229 int decode_85(char *dst, const char *line, int linelen);
1230 void encode_85(char *buf, const unsigned char *data, int bytes);
1231
1232 /* alloc.c */
1233 extern void *alloc_blob_node(void);
1234 extern void *alloc_tree_node(void);
1235 extern void *alloc_commit_node(void);
1236 extern void *alloc_tag_node(void);
1237 extern void *alloc_object_node(void);
1238 extern void alloc_report(void);
1239
1240 /* trace.c */
1241 __attribute__((format (printf, 1, 2)))
1242 extern void trace_printf(const char *format, ...);
1243 __attribute__((format (printf, 2, 3)))
1244 extern void trace_argv_printf(const char **argv, const char *format, ...);
1245 extern void trace_repo_setup(const char *prefix);
1246 extern int trace_want(const char *key);
1247 extern void trace_strbuf(const char *key, const struct strbuf *buf);
1248
1249 void packet_trace_identity(const char *prog);
1250
1251 /* add */
1252 /*
1253 * return 0 if success, 1 - if addition of a file failed and
1254 * ADD_FILES_IGNORE_ERRORS was specified in flags
1255 */
1256 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1257
1258 /* diff.c */
1259 extern int diff_auto_refresh_index;
1260
1261 /* match-trees.c */
1262 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1263 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1264
1265 /*
1266 * whitespace rules.
1267 * used by both diff and apply
1268 * last two digits are tab width
1269 */
1270 #define WS_BLANK_AT_EOL 0100
1271 #define WS_SPACE_BEFORE_TAB 0200
1272 #define WS_INDENT_WITH_NON_TAB 0400
1273 #define WS_CR_AT_EOL 01000
1274 #define WS_BLANK_AT_EOF 02000
1275 #define WS_TAB_IN_INDENT 04000
1276 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1277 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1278 #define WS_TAB_WIDTH_MASK 077
1279 extern unsigned whitespace_rule_cfg;
1280 extern unsigned whitespace_rule(const char *);
1281 extern unsigned parse_whitespace_rule(const char *);
1282 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1283 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1284 extern char *whitespace_error_string(unsigned ws);
1285 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1286 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1287 #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1288
1289 /* ls-files */
1290 int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1291 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1292
1293 char *alias_lookup(const char *alias);
1294 int split_cmdline(char *cmdline, const char ***argv);
1295 /* Takes a negative value returned by split_cmdline */
1296 const char *split_cmdline_strerror(int cmdline_errno);
1297
1298 /* git.c */
1299 struct startup_info {
1300 int have_repository;
1301 const char *prefix;
1302 };
1303 extern struct startup_info *startup_info;
1304
1305 /* merge.c */
1306 struct commit_list;
1307 int try_merge_command(const char *strategy, size_t xopts_nr,
1308 const char **xopts, struct commit_list *common,
1309 const char *head_arg, struct commit_list *remotes);
1310 int checkout_fast_forward(const unsigned char *from,
1311 const unsigned char *to,
1312 int overwrite_ignore);
1313
1314
1315 int sane_execvp(const char *file, char *const argv[]);
1316
1317 #endif /* CACHE_H */