Merge branch 'af/rebase-i-merge-options'
[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_init_raw(git_zstream *, int level);
38 void git_deflate_end(git_zstream *);
39 int git_deflate_abort(git_zstream *);
40 int git_deflate_end_gently(git_zstream *);
41 int git_deflate(git_zstream *, int flush);
42 unsigned long git_deflate_bound(git_zstream *, unsigned long);
43
44 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
45 #define DTYPE(de) ((de)->d_type)
46 #else
47 #undef DT_UNKNOWN
48 #undef DT_DIR
49 #undef DT_REG
50 #undef DT_LNK
51 #define DT_UNKNOWN 0
52 #define DT_DIR 1
53 #define DT_REG 2
54 #define DT_LNK 3
55 #define DTYPE(de) DT_UNKNOWN
56 #endif
57
58 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
59 #define S_IFINVALID 0030000
60
61 /*
62 * A "directory link" is a link to another git directory.
63 *
64 * The value 0160000 is not normally a valid mode, and
65 * also just happens to be S_IFDIR + S_IFLNK
66 *
67 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
68 * always having the same values everywhere. We should use
69 * our internal git values for these things, and then we can
70 * translate that to the OS-specific value. It just so
71 * happens that everybody shares the same bit representation
72 * in the UNIX world (and apparently wider too..)
73 */
74 #define S_IFGITLINK 0160000
75 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
76
77 /*
78 * Intensive research over the course of many years has shown that
79 * port 9418 is totally unused by anything else. Or
80 *
81 * Your search - "port 9418" - did not match any documents.
82 *
83 * as www.google.com puts it.
84 *
85 * This port has been properly assigned for git use by IANA:
86 * git (Assigned-9418) [I06-050728-0001].
87 *
88 * git 9418/tcp git pack transfer service
89 * git 9418/udp git pack transfer service
90 *
91 * with Linus Torvalds <torvalds@osdl.org> as the point of
92 * contact. September 2005.
93 *
94 * See http://www.iana.org/assignments/port-numbers
95 */
96 #define DEFAULT_GIT_PORT 9418
97
98 /*
99 * Basic data structures for the directory cache
100 */
101
102 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
103 struct cache_header {
104 unsigned int hdr_signature;
105 unsigned int hdr_version;
106 unsigned int hdr_entries;
107 };
108
109 #define INDEX_FORMAT_LB 2
110 #define INDEX_FORMAT_UB 4
111
112 /*
113 * The "cache_time" is just the low 32 bits of the
114 * time. It doesn't matter if it overflows - we only
115 * check it for equality in the 32 bits we save.
116 */
117 struct cache_time {
118 unsigned int sec;
119 unsigned int nsec;
120 };
121
122 struct stat_data {
123 struct cache_time sd_ctime;
124 struct cache_time sd_mtime;
125 unsigned int sd_dev;
126 unsigned int sd_ino;
127 unsigned int sd_uid;
128 unsigned int sd_gid;
129 unsigned int sd_size;
130 };
131
132 struct cache_entry {
133 struct stat_data ce_stat_data;
134 unsigned int ce_mode;
135 unsigned int ce_flags;
136 unsigned int ce_namelen;
137 unsigned char sha1[20];
138 struct cache_entry *next;
139 char name[FLEX_ARRAY]; /* more */
140 };
141
142 #define CE_STAGEMASK (0x3000)
143 #define CE_EXTENDED (0x4000)
144 #define CE_VALID (0x8000)
145 #define CE_STAGESHIFT 12
146
147 /*
148 * Range 0xFFFF0000 in ce_flags is divided into
149 * two parts: in-memory flags and on-disk ones.
150 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
151 * if you want to save a new flag, add it in
152 * CE_EXTENDED_FLAGS
153 *
154 * In-memory only flags
155 */
156 #define CE_UPDATE (1 << 16)
157 #define CE_REMOVE (1 << 17)
158 #define CE_UPTODATE (1 << 18)
159 #define CE_ADDED (1 << 19)
160
161 #define CE_HASHED (1 << 20)
162 #define CE_UNHASHED (1 << 21)
163 #define CE_WT_REMOVE (1 << 22) /* remove in work directory */
164 #define CE_CONFLICTED (1 << 23)
165
166 #define CE_UNPACKED (1 << 24)
167 #define CE_NEW_SKIP_WORKTREE (1 << 25)
168
169 /* used to temporarily mark paths matched by pathspecs */
170 #define CE_MATCHED (1 << 26)
171
172 /*
173 * Extended on-disk flags
174 */
175 #define CE_INTENT_TO_ADD (1 << 29)
176 #define CE_SKIP_WORKTREE (1 << 30)
177 /* CE_EXTENDED2 is for future extension */
178 #define CE_EXTENDED2 (1 << 31)
179
180 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
181
182 /*
183 * Safeguard to avoid saving wrong flags:
184 * - CE_EXTENDED2 won't get saved until its semantic is known
185 * - Bits in 0x0000FFFF have been saved in ce_flags already
186 * - Bits in 0x003F0000 are currently in-memory flags
187 */
188 #if CE_EXTENDED_FLAGS & 0x803FFFFF
189 #error "CE_EXTENDED_FLAGS out of range"
190 #endif
191
192 /*
193 * Copy the sha1 and stat state of a cache entry from one to
194 * another. But we never change the name, or the hash state!
195 */
196 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
197 static inline void copy_cache_entry(struct cache_entry *dst,
198 const struct cache_entry *src)
199 {
200 unsigned int state = dst->ce_flags & CE_STATE_MASK;
201
202 /* Don't copy hash chain and name */
203 memcpy(dst, src, offsetof(struct cache_entry, next));
204
205 /* Restore the hash state */
206 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
207 }
208
209 static inline unsigned create_ce_flags(unsigned stage)
210 {
211 return (stage << CE_STAGESHIFT);
212 }
213
214 #define ce_namelen(ce) ((ce)->ce_namelen)
215 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
216 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
217 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
218 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
219 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
220
221 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
222 static inline unsigned int create_ce_mode(unsigned int mode)
223 {
224 if (S_ISLNK(mode))
225 return S_IFLNK;
226 if (S_ISDIR(mode) || S_ISGITLINK(mode))
227 return S_IFGITLINK;
228 return S_IFREG | ce_permissions(mode);
229 }
230 static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce,
231 unsigned int mode)
232 {
233 extern int trust_executable_bit, has_symlinks;
234 if (!has_symlinks && S_ISREG(mode) &&
235 ce && S_ISLNK(ce->ce_mode))
236 return ce->ce_mode;
237 if (!trust_executable_bit && S_ISREG(mode)) {
238 if (ce && S_ISREG(ce->ce_mode))
239 return ce->ce_mode;
240 return create_ce_mode(0666);
241 }
242 return create_ce_mode(mode);
243 }
244 static inline int ce_to_dtype(const struct cache_entry *ce)
245 {
246 unsigned ce_mode = ntohl(ce->ce_mode);
247 if (S_ISREG(ce_mode))
248 return DT_REG;
249 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
250 return DT_DIR;
251 else if (S_ISLNK(ce_mode))
252 return DT_LNK;
253 else
254 return DT_UNKNOWN;
255 }
256 static inline unsigned int canon_mode(unsigned int mode)
257 {
258 if (S_ISREG(mode))
259 return S_IFREG | ce_permissions(mode);
260 if (S_ISLNK(mode))
261 return S_IFLNK;
262 if (S_ISDIR(mode))
263 return S_IFDIR;
264 return S_IFGITLINK;
265 }
266
267 #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
268
269 struct index_state {
270 struct cache_entry **cache;
271 unsigned int version;
272 unsigned int cache_nr, cache_alloc, cache_changed;
273 struct string_list *resolve_undo;
274 struct cache_tree *cache_tree;
275 struct cache_time timestamp;
276 unsigned name_hash_initialized : 1,
277 initialized : 1;
278 struct hash_table name_hash;
279 struct hash_table dir_hash;
280 };
281
282 extern struct index_state the_index;
283
284 /* Name hashing */
285 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
286 extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
287 extern void free_name_hash(struct index_state *istate);
288
289
290 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
291 #define active_cache (the_index.cache)
292 #define active_nr (the_index.cache_nr)
293 #define active_alloc (the_index.cache_alloc)
294 #define active_cache_changed (the_index.cache_changed)
295 #define active_cache_tree (the_index.cache_tree)
296
297 #define read_cache() read_index(&the_index)
298 #define read_cache_from(path) read_index_from(&the_index, (path))
299 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
300 #define is_cache_unborn() is_index_unborn(&the_index)
301 #define read_cache_unmerged() read_index_unmerged(&the_index)
302 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
303 #define discard_cache() discard_index(&the_index)
304 #define unmerged_cache() unmerged_index(&the_index)
305 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
306 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
307 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
308 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
309 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
310 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
311 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
312 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
313 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
314 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
315 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
316 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
317 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
318 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
319 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
320 #define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz))
321 #endif
322
323 enum object_type {
324 OBJ_BAD = -1,
325 OBJ_NONE = 0,
326 OBJ_COMMIT = 1,
327 OBJ_TREE = 2,
328 OBJ_BLOB = 3,
329 OBJ_TAG = 4,
330 /* 5 for future expansion */
331 OBJ_OFS_DELTA = 6,
332 OBJ_REF_DELTA = 7,
333 OBJ_ANY,
334 OBJ_MAX
335 };
336
337 static inline enum object_type object_type(unsigned int mode)
338 {
339 return S_ISDIR(mode) ? OBJ_TREE :
340 S_ISGITLINK(mode) ? OBJ_COMMIT :
341 OBJ_BLOB;
342 }
343
344 /* Double-check local_repo_env below if you add to this list. */
345 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
346 #define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
347 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
348 #define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
349 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
350 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
351 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
352 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
353 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
354 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
355 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
356 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
357 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
358 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
359 #define GITATTRIBUTES_FILE ".gitattributes"
360 #define INFOATTRIBUTES_FILE "info/attributes"
361 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
362 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
363 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
364 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
365 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
366 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
367 #define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS"
368
369 /*
370 * This environment variable is expected to contain a boolean indicating
371 * whether we should or should not treat:
372 *
373 * GIT_DIR=foo.git git ...
374 *
375 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use
376 * of this, but we use it internally to communicate to sub-processes that we
377 * are in a bare repo. If not set, defaults to true.
378 */
379 #define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
380
381 /*
382 * Repository-local GIT_* environment variables; these will be cleared
383 * when git spawns a sub-process that runs inside another repository.
384 * The array is NULL-terminated, which makes it easy to pass in the "env"
385 * parameter of a run-command invocation, or to do a simple walk.
386 */
387 extern const char * const local_repo_env[];
388
389 extern int is_bare_repository_cfg;
390 extern int is_bare_repository(void);
391 extern int is_inside_git_dir(void);
392 extern char *git_work_tree_cfg;
393 extern int is_inside_work_tree(void);
394 extern int have_git_dir(void);
395 extern const char *get_git_dir(void);
396 extern int is_git_directory(const char *path);
397 extern char *get_object_directory(void);
398 extern char *get_index_file(void);
399 extern char *get_graft_file(void);
400 extern int set_git_dir(const char *path);
401 extern const char *get_git_namespace(void);
402 extern const char *strip_namespace(const char *namespaced_ref);
403 extern const char *get_git_work_tree(void);
404 extern const char *read_gitfile(const char *path);
405 extern const char *resolve_gitdir(const char *suspect);
406 extern void set_git_work_tree(const char *tree);
407
408 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
409
410 extern const char **get_pathspec(const char *prefix, const char **pathspec);
411 extern void setup_work_tree(void);
412 extern const char *setup_git_directory_gently(int *);
413 extern const char *setup_git_directory(void);
414 extern char *prefix_path(const char *prefix, int len, const char *path);
415 extern const char *prefix_filename(const char *prefix, int len, const char *path);
416 extern int check_filename(const char *prefix, const char *name);
417 extern void verify_filename(const char *prefix,
418 const char *name,
419 int diagnose_misspelt_rev);
420 extern void verify_non_filename(const char *prefix, const char *name);
421 extern int path_inside_repo(const char *prefix, const char *path);
422
423 #define INIT_DB_QUIET 0x0001
424
425 extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
426 extern int init_db(const char *template_dir, unsigned int flags);
427
428 #define alloc_nr(x) (((x)+16)*3/2)
429
430 /*
431 * Realloc the buffer pointed at by variable 'x' so that it can hold
432 * at least 'nr' entries; the number of entries currently allocated
433 * is 'alloc', using the standard growing factor alloc_nr() macro.
434 *
435 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
436 */
437 #define ALLOC_GROW(x, nr, alloc) \
438 do { \
439 if ((nr) > alloc) { \
440 if (alloc_nr(alloc) < (nr)) \
441 alloc = (nr); \
442 else \
443 alloc = alloc_nr(alloc); \
444 x = xrealloc((x), alloc * sizeof(*(x))); \
445 } \
446 } while (0)
447
448 /* Initialize and use the cache information */
449 extern int read_index(struct index_state *);
450 extern int read_index_preload(struct index_state *, const char **pathspec);
451 extern int read_index_from(struct index_state *, const char *path);
452 extern int is_index_unborn(struct index_state *);
453 extern int read_index_unmerged(struct index_state *);
454 extern int write_index(struct index_state *, int newfd);
455 extern int discard_index(struct index_state *);
456 extern int unmerged_index(const struct index_state *);
457 extern int verify_path(const char *path);
458 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
459 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
460 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
461 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
462 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
463 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
464 #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
465 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
466 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
467 extern int remove_index_entry_at(struct index_state *, int pos);
468 extern void remove_marked_cache_entries(struct index_state *istate);
469 extern int remove_file_from_index(struct index_state *, const char *path);
470 #define ADD_CACHE_VERBOSE 1
471 #define ADD_CACHE_PRETEND 2
472 #define ADD_CACHE_IGNORE_ERRORS 4
473 #define ADD_CACHE_IGNORE_REMOVAL 8
474 #define ADD_CACHE_INTENT 16
475 #define ADD_CACHE_IMPLICIT_DOT 32 /* internal to "git add -u/-A" */
476 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
477 extern int add_file_to_index(struct index_state *, const char *path, int flags);
478 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
479 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
480 extern int index_name_is_other(const struct index_state *, const char *, int);
481 extern void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *);
482
483 /* do stat comparison even if CE_VALID is true */
484 #define CE_MATCH_IGNORE_VALID 01
485 /* do not check the contents but report dirty on racily-clean entries */
486 #define CE_MATCH_RACY_IS_DIRTY 02
487 /* do stat comparison even if CE_SKIP_WORKTREE is true */
488 #define CE_MATCH_IGNORE_SKIP_WORKTREE 04
489 extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
490 extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
491
492 #define PATHSPEC_ONESTAR 1 /* the pathspec pattern sastisfies GFNM_ONESTAR */
493
494 struct pathspec {
495 const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
496 int nr;
497 unsigned int has_wildcard:1;
498 unsigned int recursive:1;
499 int max_depth;
500 struct pathspec_item {
501 const char *match;
502 int len;
503 int nowildcard_len;
504 int flags;
505 } *items;
506 };
507
508 extern int init_pathspec(struct pathspec *, const char **);
509 extern void free_pathspec(struct pathspec *);
510 extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
511
512 extern int limit_pathspec_to_literal(void);
513
514 #define HASH_WRITE_OBJECT 1
515 #define HASH_FORMAT_CHECK 2
516 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
517 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
518
519 /*
520 * Record to sd the data from st that we use to check whether a file
521 * might have changed.
522 */
523 extern void fill_stat_data(struct stat_data *sd, struct stat *st);
524
525 /*
526 * Return 0 if st is consistent with a file not having been changed
527 * since sd was filled. If there are differences, return a
528 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
529 * INODE_CHANGED, and DATA_CHANGED.
530 */
531 extern int match_stat_data(const struct stat_data *sd, struct stat *st);
532
533 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
534
535 #define REFRESH_REALLY 0x0001 /* ignore_valid */
536 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
537 #define REFRESH_QUIET 0x0004 /* be quiet about it */
538 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
539 #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
540 #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
541 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
542
543 struct lock_file {
544 struct lock_file *next;
545 int fd;
546 pid_t owner;
547 char on_list;
548 char filename[PATH_MAX];
549 };
550 #define LOCK_DIE_ON_ERROR 1
551 #define LOCK_NODEREF 2
552 extern int unable_to_lock_error(const char *path, int err);
553 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
554 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
555 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
556 extern int commit_lock_file(struct lock_file *);
557 extern void update_index_if_able(struct index_state *, struct lock_file *);
558
559 extern int hold_locked_index(struct lock_file *, int);
560 extern int commit_locked_index(struct lock_file *);
561 extern void set_alternate_index_output(const char *);
562 extern int close_lock_file(struct lock_file *);
563 extern void rollback_lock_file(struct lock_file *);
564 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
565
566 /* Environment bits from configuration mechanism */
567 extern int trust_executable_bit;
568 extern int trust_ctime;
569 extern int check_stat;
570 extern int quote_path_fully;
571 extern int has_symlinks;
572 extern int minimum_abbrev, default_abbrev;
573 extern int ignore_case;
574 extern int assume_unchanged;
575 extern int prefer_symlink_refs;
576 extern int log_all_ref_updates;
577 extern int warn_ambiguous_refs;
578 extern int shared_repository;
579 extern const char *apply_default_whitespace;
580 extern const char *apply_default_ignorewhitespace;
581 extern const char *git_attributes_file;
582 extern int zlib_compression_level;
583 extern int core_compression_level;
584 extern int core_compression_seen;
585 extern size_t packed_git_window_size;
586 extern size_t packed_git_limit;
587 extern size_t delta_base_cache_limit;
588 extern unsigned long big_file_threshold;
589 extern unsigned long pack_size_limit_cfg;
590 extern int read_replace_refs;
591 extern int fsync_object_files;
592 extern int core_preload_index;
593 extern int core_apply_sparse_checkout;
594 extern int precomposed_unicode;
595
596 /*
597 * The character that begins a commented line in user-editable file
598 * that is subject to stripspace.
599 */
600 extern char comment_line_char;
601
602 enum branch_track {
603 BRANCH_TRACK_UNSPECIFIED = -1,
604 BRANCH_TRACK_NEVER = 0,
605 BRANCH_TRACK_REMOTE,
606 BRANCH_TRACK_ALWAYS,
607 BRANCH_TRACK_EXPLICIT,
608 BRANCH_TRACK_OVERRIDE
609 };
610
611 enum rebase_setup_type {
612 AUTOREBASE_NEVER = 0,
613 AUTOREBASE_LOCAL,
614 AUTOREBASE_REMOTE,
615 AUTOREBASE_ALWAYS
616 };
617
618 enum push_default_type {
619 PUSH_DEFAULT_NOTHING = 0,
620 PUSH_DEFAULT_MATCHING,
621 PUSH_DEFAULT_SIMPLE,
622 PUSH_DEFAULT_UPSTREAM,
623 PUSH_DEFAULT_CURRENT,
624 PUSH_DEFAULT_UNSPECIFIED
625 };
626
627 extern enum branch_track git_branch_track;
628 extern enum rebase_setup_type autorebase;
629 extern enum push_default_type push_default;
630
631 enum object_creation_mode {
632 OBJECT_CREATION_USES_HARDLINKS = 0,
633 OBJECT_CREATION_USES_RENAMES = 1
634 };
635
636 extern enum object_creation_mode object_creation_mode;
637
638 extern char *notes_ref_name;
639
640 extern int grafts_replace_parents;
641
642 #define GIT_REPO_VERSION 0
643 extern int repository_format_version;
644 extern int check_repository_format(void);
645
646 #define MTIME_CHANGED 0x0001
647 #define CTIME_CHANGED 0x0002
648 #define OWNER_CHANGED 0x0004
649 #define MODE_CHANGED 0x0008
650 #define INODE_CHANGED 0x0010
651 #define DATA_CHANGED 0x0020
652 #define TYPE_CHANGED 0x0040
653
654 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
655 __attribute__((format (printf, 3, 4)));
656 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
657 __attribute__((format (printf, 3, 4)));
658 extern char *git_pathdup(const char *fmt, ...)
659 __attribute__((format (printf, 1, 2)));
660 extern char *mkpathdup(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 #define EMPTY_BLOB_SHA1_HEX \
710 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
711 #define EMPTY_BLOB_SHA1_BIN_LITERAL \
712 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
713 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
714 #define EMPTY_BLOB_SHA1_BIN \
715 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
716
717 static inline int is_empty_blob_sha1(const unsigned char *sha1)
718 {
719 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
720 }
721
722 int git_mkstemp(char *path, size_t n, const char *template);
723
724 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
725
726 /* set default permissions by passing mode arguments to open(2) */
727 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
728 int git_mkstemp_mode(char *pattern, int mode);
729
730 /*
731 * NOTE NOTE NOTE!!
732 *
733 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
734 * not be changed. Old repositories have core.sharedrepository written in
735 * numeric format, and therefore these values are preserved for compatibility
736 * reasons.
737 */
738 enum sharedrepo {
739 PERM_UMASK = 0,
740 OLD_PERM_GROUP = 1,
741 OLD_PERM_EVERYBODY = 2,
742 PERM_GROUP = 0660,
743 PERM_EVERYBODY = 0664
744 };
745 int git_config_perm(const char *var, const char *value);
746 int adjust_shared_perm(const char *path);
747 int safe_create_leading_directories(char *path);
748 int safe_create_leading_directories_const(const char *path);
749 int mkdir_in_gitdir(const char *path);
750 extern void home_config_paths(char **global, char **xdg, char *file);
751 extern char *expand_user_path(const char *path);
752 const char *enter_repo(const char *path, int strict);
753 static inline int is_absolute_path(const char *path)
754 {
755 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
756 }
757 int is_directory(const char *);
758 const char *real_path(const char *path);
759 const char *real_path_if_valid(const char *path);
760 const char *absolute_path(const char *path);
761 const char *relative_path(const char *abs, const char *base);
762 int normalize_path_copy(char *dst, const char *src);
763 int longest_ancestor_length(const char *path, struct string_list *prefixes);
764 char *strip_path_suffix(const char *path, const char *suffix);
765 int daemon_avoid_alias(const char *path);
766 int offset_1st_component(const char *path);
767
768 /* object replacement */
769 #define READ_SHA1_FILE_REPLACE 1
770 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
771 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
772 {
773 return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
774 }
775 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
776 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
777 {
778 if (!read_replace_refs)
779 return sha1;
780 return do_lookup_replace_object(sha1);
781 }
782
783 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
784 extern int sha1_object_info(const unsigned char *, unsigned long *);
785 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
786 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
787 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
788 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
789 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
790 extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
791 extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
792
793 /* global flag to enable extra checks when accessing packed objects */
794 extern int do_check_packed_object_crc;
795
796 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
797
798 extern int move_temp_to_file(const char *tmpfile, const char *filename);
799
800 extern int has_sha1_pack(const unsigned char *sha1);
801 extern int has_sha1_file(const unsigned char *sha1);
802 extern int has_loose_object_nonlocal(const unsigned char *sha1);
803
804 extern int has_pack_index(const unsigned char *sha1);
805
806 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
807
808 extern const signed char hexval_table[256];
809 static inline unsigned int hexval(unsigned char c)
810 {
811 return hexval_table[c];
812 }
813
814 /* Convert to/from hex/sha1 representation */
815 #define MINIMUM_ABBREV minimum_abbrev
816 #define DEFAULT_ABBREV default_abbrev
817
818 struct object_context {
819 unsigned char tree[20];
820 char path[PATH_MAX];
821 unsigned mode;
822 };
823
824 #define GET_SHA1_QUIETLY 01
825 #define GET_SHA1_COMMIT 02
826 #define GET_SHA1_COMMITTISH 04
827 #define GET_SHA1_TREE 010
828 #define GET_SHA1_TREEISH 020
829 #define GET_SHA1_BLOB 040
830 #define GET_SHA1_ONLY_TO_DIE 04000
831
832 extern int get_sha1(const char *str, unsigned char *sha1);
833 extern int get_sha1_commit(const char *str, unsigned char *sha1);
834 extern int get_sha1_committish(const char *str, unsigned char *sha1);
835 extern int get_sha1_tree(const char *str, unsigned char *sha1);
836 extern int get_sha1_treeish(const char *str, unsigned char *sha1);
837 extern int get_sha1_blob(const char *str, unsigned char *sha1);
838 extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
839 extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);
840
841 typedef int each_abbrev_fn(const unsigned char *sha1, void *);
842 extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
843
844 /*
845 * Try to read a SHA1 in hexadecimal format from the 40 characters
846 * starting at hex. Write the 20-byte result to sha1 in binary form.
847 * Return 0 on success. Reading stops if a NUL is encountered in the
848 * input, so it is safe to pass this function an arbitrary
849 * null-terminated string.
850 */
851 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
852
853 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
854 extern int read_ref_full(const char *refname, unsigned char *sha1,
855 int reading, int *flags);
856 extern int read_ref(const char *refname, unsigned char *sha1);
857
858 /*
859 * Resolve a reference, recursively following symbolic refererences.
860 *
861 * Store the referred-to object's name in sha1 and return the name of
862 * the non-symbolic reference that ultimately pointed at it. The
863 * return value, if not NULL, is a pointer into either a static buffer
864 * or the input ref.
865 *
866 * If the reference cannot be resolved to an object, the behavior
867 * depends on the "reading" argument:
868 *
869 * - If reading is set, return NULL.
870 *
871 * - If reading is not set, clear sha1 and return the name of the last
872 * reference name in the chain, which will either be a non-symbolic
873 * reference or an undefined reference. If this is a prelude to
874 * "writing" to the ref, the return value is the name of the ref
875 * that will actually be created or changed.
876 *
877 * If flag is non-NULL, set the value that it points to the
878 * combination of REF_ISPACKED (if the reference was found among the
879 * packed references) and REF_ISSYMREF (if the initial reference was a
880 * symbolic reference).
881 *
882 * If ref is not a properly-formatted, normalized reference, return
883 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
884 * give up and return NULL.
885 *
886 * errno is sometimes set on errors, but not always.
887 */
888 extern const char *resolve_ref_unsafe(const char *ref, unsigned char *sha1, int reading, int *flag);
889 extern char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag);
890
891 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
892 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
893 extern int interpret_branch_name(const char *str, struct strbuf *);
894 extern int get_sha1_mb(const char *str, unsigned char *sha1);
895
896 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
897 extern const char *ref_rev_parse_rules[];
898 #define ref_fetch_rules ref_rev_parse_rules
899
900 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
901 extern int validate_headref(const char *ref);
902
903 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
904 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
905 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
906 extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
907
908 extern void *read_object_with_reference(const unsigned char *sha1,
909 const char *required_type,
910 unsigned long *size,
911 unsigned char *sha1_ret);
912
913 extern struct object *peel_to_type(const char *name, int namelen,
914 struct object *o, enum object_type);
915
916 enum date_mode {
917 DATE_NORMAL = 0,
918 DATE_RELATIVE,
919 DATE_SHORT,
920 DATE_LOCAL,
921 DATE_ISO8601,
922 DATE_RFC2822,
923 DATE_RAW
924 };
925
926 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
927 void show_date_relative(unsigned long time, int tz, const struct timeval *now,
928 struct strbuf *timebuf);
929 int parse_date(const char *date, char *buf, int bufsize);
930 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
931 int parse_expiry_date(const char *date, unsigned long *timestamp);
932 void datestamp(char *buf, int bufsize);
933 #define approxidate(s) approxidate_careful((s), NULL)
934 unsigned long approxidate_careful(const char *, int *);
935 unsigned long approxidate_relative(const char *date, const struct timeval *now);
936 enum date_mode parse_date_format(const char *format);
937
938 #define IDENT_STRICT 1
939 #define IDENT_NO_DATE 2
940 #define IDENT_NO_NAME 4
941 extern const char *git_author_info(int);
942 extern const char *git_committer_info(int);
943 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
944 extern const char *fmt_name(const char *name, const char *email);
945 extern const char *ident_default_email(void);
946 extern const char *git_editor(void);
947 extern const char *git_pager(int stdout_is_tty);
948 extern int git_ident_config(const char *, const char *, void *);
949
950 struct ident_split {
951 const char *name_begin;
952 const char *name_end;
953 const char *mail_begin;
954 const char *mail_end;
955 const char *date_begin;
956 const char *date_end;
957 const char *tz_begin;
958 const char *tz_end;
959 };
960 /*
961 * Signals an success with 0, but time part of the result may be NULL
962 * if the input lacks timestamp and zone
963 */
964 extern int split_ident_line(struct ident_split *, const char *, int);
965
966 struct checkout {
967 const char *base_dir;
968 int base_dir_len;
969 unsigned force:1,
970 quiet:1,
971 not_new:1,
972 refresh_cache:1;
973 };
974
975 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
976
977 struct cache_def {
978 char path[PATH_MAX + 1];
979 int len;
980 int flags;
981 int track_flags;
982 int prefix_len_stat_func;
983 };
984
985 extern int has_symlink_leading_path(const char *name, int len);
986 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
987 extern int check_leading_path(const char *name, int len);
988 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
989 extern void schedule_dir_for_removal(const char *name, int len);
990 extern void remove_scheduled_dirs(void);
991
992 extern struct alternate_object_database {
993 struct alternate_object_database *next;
994 char *name;
995 char base[FLEX_ARRAY]; /* more */
996 } *alt_odb_list;
997 extern void prepare_alt_odb(void);
998 extern void read_info_alternates(const char * relative_base, int depth);
999 extern void add_to_alternates_file(const char *reference);
1000 typedef int alt_odb_fn(struct alternate_object_database *, void *);
1001 extern void foreach_alt_odb(alt_odb_fn, void*);
1002
1003 struct pack_window {
1004 struct pack_window *next;
1005 unsigned char *base;
1006 off_t offset;
1007 size_t len;
1008 unsigned int last_used;
1009 unsigned int inuse_cnt;
1010 };
1011
1012 extern struct packed_git {
1013 struct packed_git *next;
1014 struct pack_window *windows;
1015 off_t pack_size;
1016 const void *index_data;
1017 size_t index_size;
1018 uint32_t num_objects;
1019 uint32_t num_bad_objects;
1020 unsigned char *bad_object_sha1;
1021 int index_version;
1022 time_t mtime;
1023 int pack_fd;
1024 unsigned pack_local:1,
1025 pack_keep:1,
1026 do_not_close:1;
1027 unsigned char sha1[20];
1028 /* something like ".git/objects/pack/xxxxx.pack" */
1029 char pack_name[FLEX_ARRAY]; /* more */
1030 } *packed_git;
1031
1032 struct pack_entry {
1033 off_t offset;
1034 unsigned char sha1[20];
1035 struct packed_git *p;
1036 };
1037
1038 struct ref {
1039 struct ref *next;
1040 unsigned char old_sha1[20];
1041 unsigned char new_sha1[20];
1042 char *symref;
1043 unsigned int
1044 force:1,
1045 forced_update:1,
1046 deletion:1,
1047 matched:1;
1048
1049 /*
1050 * Order is important here, as we write to FETCH_HEAD
1051 * in numeric order. And the default NOT_FOR_MERGE
1052 * should be 0, so that xcalloc'd structures get it
1053 * by default.
1054 */
1055 enum {
1056 FETCH_HEAD_MERGE = -1,
1057 FETCH_HEAD_NOT_FOR_MERGE = 0,
1058 FETCH_HEAD_IGNORE = 1
1059 } fetch_head_status;
1060
1061 enum {
1062 REF_STATUS_NONE = 0,
1063 REF_STATUS_OK,
1064 REF_STATUS_REJECT_NONFASTFORWARD,
1065 REF_STATUS_REJECT_ALREADY_EXISTS,
1066 REF_STATUS_REJECT_NODELETE,
1067 REF_STATUS_REJECT_FETCH_FIRST,
1068 REF_STATUS_REJECT_NEEDS_FORCE,
1069 REF_STATUS_UPTODATE,
1070 REF_STATUS_REMOTE_REJECT,
1071 REF_STATUS_EXPECTING_REPORT
1072 } status;
1073 char *remote_status;
1074 struct ref *peer_ref; /* when renaming */
1075 char name[FLEX_ARRAY]; /* more */
1076 };
1077
1078 #define REF_NORMAL (1u << 0)
1079 #define REF_HEADS (1u << 1)
1080 #define REF_TAGS (1u << 2)
1081
1082 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
1083
1084 #define CONNECT_VERBOSE (1u << 0)
1085 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
1086 extern int finish_connect(struct child_process *conn);
1087 extern int git_connection_is_socket(struct child_process *conn);
1088 struct extra_have_objects {
1089 int nr, alloc;
1090 unsigned char (*array)[20];
1091 };
1092 extern struct ref **get_remote_heads(int in, char *src_buf, size_t src_len,
1093 struct ref **list, unsigned int flags,
1094 struct extra_have_objects *);
1095 extern int server_supports(const char *feature);
1096 extern int parse_feature_request(const char *features, const char *feature);
1097 extern const char *server_feature_value(const char *feature, int *len_ret);
1098 extern const char *parse_feature_value(const char *feature_list, const char *feature, int *len_ret);
1099
1100 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1101
1102 /* A hook for count-objects to report invalid files in pack directory */
1103 extern void (*report_garbage)(const char *desc, const char *path);
1104
1105 extern void prepare_packed_git(void);
1106 extern void reprepare_packed_git(void);
1107 extern void install_packed_git(struct packed_git *pack);
1108
1109 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1110 struct packed_git *packs);
1111
1112 extern void pack_report(void);
1113 extern int open_pack_index(struct packed_git *);
1114 extern void close_pack_index(struct packed_git *);
1115 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1116 extern void close_pack_windows(struct packed_git *);
1117 extern void unuse_pack(struct pack_window **);
1118 extern void free_pack_by_name(const char *);
1119 extern void clear_delta_base_cache(void);
1120 extern struct packed_git *add_packed_git(const char *, int, int);
1121 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1122 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1123 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1124 extern int is_pack_valid(struct packed_git *);
1125 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1126 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1127 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1128 extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1129
1130 struct object_info {
1131 /* Request */
1132 unsigned long *sizep;
1133
1134 /* Response */
1135 enum {
1136 OI_CACHED,
1137 OI_LOOSE,
1138 OI_PACKED,
1139 OI_DBCACHED
1140 } whence;
1141 union {
1142 /*
1143 * struct {
1144 * ... Nothing to expose in this case
1145 * } cached;
1146 * struct {
1147 * ... Nothing to expose in this case
1148 * } loose;
1149 */
1150 struct {
1151 struct packed_git *pack;
1152 off_t offset;
1153 unsigned int is_delta;
1154 } packed;
1155 } u;
1156 };
1157 extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1158
1159 /* Dumb servers support */
1160 extern int update_server_info(int);
1161
1162 /* git_config_parse_key() returns these negated: */
1163 #define CONFIG_INVALID_KEY 1
1164 #define CONFIG_NO_SECTION_OR_NAME 2
1165 /* git_config_set(), git_config_set_multivar() return the above or these: */
1166 #define CONFIG_NO_LOCK -1
1167 #define CONFIG_INVALID_FILE 3
1168 #define CONFIG_NO_WRITE 4
1169 #define CONFIG_NOTHING_SET 5
1170 #define CONFIG_INVALID_PATTERN 6
1171 #define CONFIG_GENERIC_ERROR 7
1172
1173 typedef int (*config_fn_t)(const char *, const char *, void *);
1174 extern int git_default_config(const char *, const char *, void *);
1175 extern int git_config_from_file(config_fn_t fn, const char *, void *);
1176 extern void git_config_push_parameter(const char *text);
1177 extern int git_config_from_parameters(config_fn_t fn, void *data);
1178 extern int git_config(config_fn_t fn, void *);
1179 extern int git_config_with_options(config_fn_t fn, void *,
1180 const char *filename, int respect_includes);
1181 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1182 extern int git_parse_ulong(const char *, unsigned long *);
1183 extern int git_config_int(const char *, const char *);
1184 extern unsigned long git_config_ulong(const char *, const char *);
1185 extern int git_config_bool_or_int(const char *, const char *, int *);
1186 extern int git_config_bool(const char *, const char *);
1187 extern int git_config_maybe_bool(const char *, const char *);
1188 extern int git_config_string(const char **, const char *, const char *);
1189 extern int git_config_pathname(const char **, const char *, const char *);
1190 extern int git_config_set_in_file(const char *, const char *, const char *);
1191 extern int git_config_set(const char *, const char *);
1192 extern int git_config_parse_key(const char *, char **, int *);
1193 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1194 extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1195 extern int git_config_rename_section(const char *, const char *);
1196 extern int git_config_rename_section_in_file(const char *, const char *, const char *);
1197 extern const char *git_etc_gitconfig(void);
1198 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1199 extern int git_env_bool(const char *, int);
1200 extern int git_config_system(void);
1201 extern int config_error_nonbool(const char *);
1202 #if defined(__GNUC__) && ! defined(__clang__)
1203 #define config_error_nonbool(s) (config_error_nonbool(s), -1)
1204 #endif
1205 extern const char *get_log_output_encoding(void);
1206 extern const char *get_commit_output_encoding(void);
1207
1208 extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1209
1210 struct config_include_data {
1211 int depth;
1212 config_fn_t fn;
1213 void *data;
1214 };
1215 #define CONFIG_INCLUDE_INIT { 0 }
1216 extern int git_config_include(const char *name, const char *value, void *data);
1217
1218 /*
1219 * Match and parse a config key of the form:
1220 *
1221 * section.(subsection.)?key
1222 *
1223 * (i.e., what gets handed to a config_fn_t). The caller provides the section;
1224 * we return -1 if it does not match, 0 otherwise. The subsection and key
1225 * out-parameters are filled by the function (and subsection is NULL if it is
1226 * missing).
1227 */
1228 extern int parse_config_key(const char *var,
1229 const char *section,
1230 const char **subsection, int *subsection_len,
1231 const char **key);
1232
1233 extern int committer_ident_sufficiently_given(void);
1234 extern int author_ident_sufficiently_given(void);
1235
1236 extern const char *git_commit_encoding;
1237 extern const char *git_log_output_encoding;
1238 extern const char *git_mailmap_file;
1239 extern const char *git_mailmap_blob;
1240
1241 /* IO helper functions */
1242 extern void maybe_flush_or_die(FILE *, const char *);
1243 extern int copy_fd(int ifd, int ofd);
1244 extern int copy_file(const char *dst, const char *src, int mode);
1245 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1246 extern void write_or_die(int fd, const void *buf, size_t count);
1247 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1248 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1249 extern void fsync_or_die(int fd, const char *);
1250
1251 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1252 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1253 static inline ssize_t write_str_in_full(int fd, const char *str)
1254 {
1255 return write_in_full(fd, str, strlen(str));
1256 }
1257
1258 /* pager.c */
1259 extern void setup_pager(void);
1260 extern const char *pager_program;
1261 extern int pager_in_use(void);
1262 extern int pager_use_color;
1263 extern int term_columns(void);
1264 extern int decimal_width(int);
1265 extern int check_pager_config(const char *cmd);
1266
1267 extern const char *editor_program;
1268 extern const char *askpass_program;
1269 extern const char *excludes_file;
1270
1271 /* base85 */
1272 int decode_85(char *dst, const char *line, int linelen);
1273 void encode_85(char *buf, const unsigned char *data, int bytes);
1274
1275 /* alloc.c */
1276 extern void *alloc_blob_node(void);
1277 extern void *alloc_tree_node(void);
1278 extern void *alloc_commit_node(void);
1279 extern void *alloc_tag_node(void);
1280 extern void *alloc_object_node(void);
1281 extern void alloc_report(void);
1282
1283 /* trace.c */
1284 __attribute__((format (printf, 1, 2)))
1285 extern void trace_printf(const char *format, ...);
1286 __attribute__((format (printf, 2, 3)))
1287 extern void trace_argv_printf(const char **argv, const char *format, ...);
1288 extern void trace_repo_setup(const char *prefix);
1289 extern int trace_want(const char *key);
1290 extern void trace_strbuf(const char *key, const struct strbuf *buf);
1291
1292 void packet_trace_identity(const char *prog);
1293
1294 /* add */
1295 /*
1296 * return 0 if success, 1 - if addition of a file failed and
1297 * ADD_FILES_IGNORE_ERRORS was specified in flags
1298 */
1299 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1300
1301 /* diff.c */
1302 extern int diff_auto_refresh_index;
1303
1304 /* match-trees.c */
1305 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1306 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1307
1308 /*
1309 * whitespace rules.
1310 * used by both diff and apply
1311 * last two digits are tab width
1312 */
1313 #define WS_BLANK_AT_EOL 0100
1314 #define WS_SPACE_BEFORE_TAB 0200
1315 #define WS_INDENT_WITH_NON_TAB 0400
1316 #define WS_CR_AT_EOL 01000
1317 #define WS_BLANK_AT_EOF 02000
1318 #define WS_TAB_IN_INDENT 04000
1319 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1320 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1321 #define WS_TAB_WIDTH_MASK 077
1322 extern unsigned whitespace_rule_cfg;
1323 extern unsigned whitespace_rule(const char *);
1324 extern unsigned parse_whitespace_rule(const char *);
1325 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1326 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1327 extern char *whitespace_error_string(unsigned ws);
1328 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1329 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1330 #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1331
1332 /* ls-files */
1333 int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1334 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1335
1336 char *alias_lookup(const char *alias);
1337 int split_cmdline(char *cmdline, const char ***argv);
1338 /* Takes a negative value returned by split_cmdline */
1339 const char *split_cmdline_strerror(int cmdline_errno);
1340
1341 /* git.c */
1342 struct startup_info {
1343 int have_repository;
1344 const char *prefix;
1345 };
1346 extern struct startup_info *startup_info;
1347
1348 /* merge.c */
1349 struct commit_list;
1350 int try_merge_command(const char *strategy, size_t xopts_nr,
1351 const char **xopts, struct commit_list *common,
1352 const char *head_arg, struct commit_list *remotes);
1353 int checkout_fast_forward(const unsigned char *from,
1354 const unsigned char *to,
1355 int overwrite_ignore);
1356
1357
1358 int sane_execvp(const char *file, char *const argv[]);
1359
1360 /*
1361 * A struct to encapsulate the concept of whether a file has changed
1362 * since we last checked it. This uses criteria similar to those used
1363 * for the index.
1364 */
1365 struct stat_validity {
1366 struct stat_data *sd;
1367 };
1368
1369 void stat_validity_clear(struct stat_validity *sv);
1370
1371 /*
1372 * Returns 1 if the path is a regular file (or a symlink to a regular
1373 * file) and matches the saved stat_validity, 0 otherwise. A missing
1374 * or inaccessible file is considered a match if the struct was just
1375 * initialized, or if the previous update found an inaccessible file.
1376 */
1377 int stat_validity_check(struct stat_validity *sv, const char *path);
1378
1379 /*
1380 * Update the stat_validity from a file opened at descriptor fd. If
1381 * the file is missing, inaccessible, or not a regular file, then
1382 * future calls to stat_validity_check will match iff one of those
1383 * conditions continues to be true.
1384 */
1385 void stat_validity_update(struct stat_validity *sv, int fd);
1386
1387 #endif /* CACHE_H */