t2104: make sure split index mode is off for the version test
[git/git.git] / cache.h
CommitLineData
e83c5163
LT
1#ifndef CACHE_H
2#define CACHE_H
3
4050c0df 4#include "git-compat-util.h"
5ecd293d 5#include "strbuf.h"
e05881a4 6#include "hashmap.h"
75194438 7#include "advice.h"
65784830 8#include "gettext.h"
d1bf0e08 9#include "convert.h"
e83c5163 10
cef661fc 11#include SHA1_HEADER
9126f009
NP
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
e83c5163 18
9126f009 19#include <zlib.h>
ef49a7a0
JH
20typedef 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
30void git_inflate_init(git_zstream *);
31void git_inflate_init_gzip_only(git_zstream *);
32void git_inflate_end(git_zstream *);
33int git_inflate(git_zstream *, int flush);
34
35void git_deflate_init(git_zstream *, int level);
36void git_deflate_init_gzip(git_zstream *, int level);
c3c2e1a0 37void git_deflate_init_raw(git_zstream *, int level);
ef49a7a0 38void git_deflate_end(git_zstream *);
568508e7 39int git_deflate_abort(git_zstream *);
ef49a7a0
JH
40int git_deflate_end_gently(git_zstream *);
41int git_deflate(git_zstream *, int flush);
42unsigned long git_deflate_bound(git_zstream *, unsigned long);
39c68542 43
962554c6 44#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
b6829693
ET
45#define DTYPE(de) ((de)->d_type)
46#else
0bdd79af
JH
47#undef DT_UNKNOWN
48#undef DT_DIR
49#undef DT_REG
50#undef DT_LNK
b6829693
ET
51#define DT_UNKNOWN 0
52#define DT_DIR 1
53#define DT_REG 2
a15c1c60 54#define DT_LNK 3
b6829693
ET
55#define DTYPE(de) DT_UNKNOWN
56#endif
57
40689ae1
MK
58/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
59#define S_IFINVALID 0030000
60
9eec4795
LT
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 */
302b9282
MW
74#define S_IFGITLINK 0160000
75#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
9eec4795 76
2386d658
LT
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.
ba8a4970
LT
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
2386d658
LT
95 */
96#define DEFAULT_GIT_PORT 9418
97
e83c5163
LT
98/*
99 * Basic data structures for the directory cache
e83c5163
LT
100 */
101
102#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
103struct cache_header {
7800c1eb
TG
104 uint32_t hdr_signature;
105 uint32_t hdr_version;
106 uint32_t hdr_entries;
e83c5163
LT
107};
108
9d227781
JH
109#define INDEX_FORMAT_LB 2
110#define INDEX_FORMAT_UB 4
111
e83c5163
LT
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 */
117struct cache_time {
7800c1eb
TG
118 uint32_t sec;
119 uint32_t nsec;
e83c5163
LT
120};
121
c21d39d7
MH
122struct 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
e83c5163 132struct cache_entry {
8b013788 133 struct hashmap_entry ent;
c21d39d7 134 struct stat_data ce_stat_data;
ccc4feb5 135 unsigned int ce_mode;
7a51ed66 136 unsigned int ce_flags;
b60e188c 137 unsigned int ce_namelen;
5fc2fc8f 138 unsigned int index; /* for link extension */
e83c5163 139 unsigned char sha1[20];
8f1d2e6f 140 char name[FLEX_ARRAY]; /* more */
e83c5163
LT
141};
142
95fd5bf8 143#define CE_STAGEMASK (0x3000)
16ce2e4c 144#define CE_EXTENDED (0x4000)
5f73076c 145#define CE_VALID (0x8000)
aee46198 146#define CE_STAGESHIFT 12
95fd5bf8 147
06aaaa0b 148/*
ce51bf09 149 * Range 0xFFFF0FFF in ce_flags is divided into
06aaaa0b
NTND
150 * two parts: in-memory flags and on-disk ones.
151 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
152 * if you want to save a new flag, add it in
153 * CE_EXTENDED_FLAGS
154 *
155 * In-memory only flags
156 */
2977ffbb
NTND
157#define CE_UPDATE (1 << 16)
158#define CE_REMOVE (1 << 17)
159#define CE_UPTODATE (1 << 18)
160#define CE_ADDED (1 << 19)
a22c6371 161
2977ffbb 162#define CE_HASHED (1 << 20)
2977ffbb
NTND
163#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
164#define CE_CONFLICTED (1 << 23)
7a51ed66 165
2977ffbb 166#define CE_UNPACKED (1 << 24)
2431afbf 167#define CE_NEW_SKIP_WORKTREE (1 << 25)
da165f47 168
e721c154
NTND
169/* used to temporarily mark paths matched by pathspecs */
170#define CE_MATCHED (1 << 26)
171
078a58e8 172#define CE_UPDATE_IN_BASE (1 << 27)
b3c96fb1 173#define CE_STRIP_NAME (1 << 28)
078a58e8 174
06aaaa0b
NTND
175/*
176 * Extended on-disk flags
177 */
2977ffbb
NTND
178#define CE_INTENT_TO_ADD (1 << 29)
179#define CE_SKIP_WORKTREE (1 << 30)
06aaaa0b 180/* CE_EXTENDED2 is for future extension */
2977ffbb 181#define CE_EXTENDED2 (1 << 31)
06aaaa0b 182
44a36913 183#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
06aaaa0b
NTND
184
185/*
186 * Safeguard to avoid saving wrong flags:
187 * - CE_EXTENDED2 won't get saved until its semantic is known
188 * - Bits in 0x0000FFFF have been saved in ce_flags already
189 * - Bits in 0x003F0000 are currently in-memory flags
190 */
191#if CE_EXTENDED_FLAGS & 0x803FFFFF
192#error "CE_EXTENDED_FLAGS out of range"
193#endif
194
64acde94
NTND
195struct pathspec;
196
eb7a2f1d
LT
197/*
198 * Copy the sha1 and stat state of a cache entry from one to
199 * another. But we never change the name, or the hash state!
200 */
20d142b4
RS
201static inline void copy_cache_entry(struct cache_entry *dst,
202 const struct cache_entry *src)
eb7a2f1d 203{
419a597f 204 unsigned int state = dst->ce_flags & CE_HASHED;
eb7a2f1d
LT
205
206 /* Don't copy hash chain and name */
8b013788
KB
207 memcpy(&dst->ce_stat_data, &src->ce_stat_data,
208 offsetof(struct cache_entry, name) -
209 offsetof(struct cache_entry, ce_stat_data));
eb7a2f1d
LT
210
211 /* Restore the hash state */
419a597f 212 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state;
eb7a2f1d
LT
213}
214
b60e188c 215static inline unsigned create_ce_flags(unsigned stage)
7fec10b7 216{
b60e188c 217 return (stage << CE_STAGESHIFT);
7fec10b7
JH
218}
219
b60e188c 220#define ce_namelen(ce) ((ce)->ce_namelen)
aee46198 221#define ce_size(ce) cache_entry_size(ce_namelen(ce))
7a51ed66 222#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
eadb5831 223#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
44a36913 224#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
eadb5831 225#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
aee46198 226
e4479470 227#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
8ae0a8c5
KS
228static inline unsigned int create_ce_mode(unsigned int mode)
229{
8ae0a8c5 230 if (S_ISLNK(mode))
7a51ed66 231 return S_IFLNK;
302b9282 232 if (S_ISDIR(mode) || S_ISGITLINK(mode))
7a51ed66
LT
233 return S_IFGITLINK;
234 return S_IFREG | ce_permissions(mode);
8ae0a8c5 235}
20d142b4
RS
236static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce,
237 unsigned int mode)
185c975f 238{
78a8d641
JS
239 extern int trust_executable_bit, has_symlinks;
240 if (!has_symlinks && S_ISREG(mode) &&
7a51ed66 241 ce && S_ISLNK(ce->ce_mode))
78a8d641 242 return ce->ce_mode;
185c975f 243 if (!trust_executable_bit && S_ISREG(mode)) {
7a51ed66 244 if (ce && S_ISREG(ce->ce_mode))
185c975f
JH
245 return ce->ce_mode;
246 return create_ce_mode(0666);
247 }
248 return create_ce_mode(mode);
249}
d6b8fc30
JH
250static inline int ce_to_dtype(const struct cache_entry *ce)
251{
252 unsigned ce_mode = ntohl(ce->ce_mode);
253 if (S_ISREG(ce_mode))
254 return DT_REG;
255 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
256 return DT_DIR;
257 else if (S_ISLNK(ce_mode))
258 return DT_LNK;
259 else
260 return DT_UNKNOWN;
261}
b90d9b88
RS
262static inline unsigned int canon_mode(unsigned int mode)
263{
264 if (S_ISREG(mode))
265 return S_IFREG | ce_permissions(mode);
266 if (S_ISLNK(mode))
267 return S_IFLNK;
268 if (S_ISDIR(mode))
269 return S_IFDIR;
270 return S_IFGITLINK;
271}
e4479470 272
ee7825b5 273#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
f5cabd13 274
e636a7b4
NTND
275#define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */
276#define CE_ENTRY_CHANGED (1 << 1)
277#define CE_ENTRY_REMOVED (1 << 2)
278#define CE_ENTRY_ADDED (1 << 3)
6c306a34 279#define RESOLVE_UNDO_CHANGED (1 << 4)
a5400efe 280#define CACHE_TREE_CHANGED (1 << 5)
c18b80a0 281#define SPLIT_INDEX_ORDERED (1 << 6)
e636a7b4 282
5fc2fc8f 283struct split_index;
228e94f9
JH
284struct index_state {
285 struct cache_entry **cache;
9d227781 286 unsigned int version;
228e94f9 287 unsigned int cache_nr, cache_alloc, cache_changed;
cfc5789a 288 struct string_list *resolve_undo;
228e94f9 289 struct cache_tree *cache_tree;
5fc2fc8f 290 struct split_index *split_index;
fba2f38a 291 struct cache_time timestamp;
913e0e99
JH
292 unsigned name_hash_initialized : 1,
293 initialized : 1;
8b013788 294 struct hashmap name_hash;
e05881a4 295 struct hashmap dir_hash;
e93021b2 296 unsigned char sha1[20];
228e94f9
JH
297};
298
299extern struct index_state the_index;
300
96872bc2
LT
301/* Name hashing */
302extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
2092678c
KB
303extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
304extern void free_name_hash(struct index_state *istate);
96872bc2
LT
305
306
4aab5b46 307#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
228e94f9
JH
308#define active_cache (the_index.cache)
309#define active_nr (the_index.cache_nr)
310#define active_alloc (the_index.cache_alloc)
311#define active_cache_changed (the_index.cache_changed)
312#define active_cache_tree (the_index.cache_tree)
e83c5163 313
4aab5b46
JH
314#define read_cache() read_index(&the_index)
315#define read_cache_from(path) read_index_from(&the_index, (path))
671c9b7e 316#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
fa7b3c2f 317#define is_cache_unborn() is_index_unborn(&the_index)
e46bbcf6 318#define read_cache_unmerged() read_index_unmerged(&the_index)
4aab5b46 319#define discard_cache() discard_index(&the_index)
94a5728c 320#define unmerged_cache() unmerged_index(&the_index)
4aab5b46
JH
321#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
322#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
81dc2307 323#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
4aab5b46
JH
324#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
325#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
38ed1d89
JH
326#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
327#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
3deffc52 328#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
4bd5b7da
JH
329#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
330#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
db5360f3
ES
331#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen))
332#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase))
98fa4738 333#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
cfc5789a 334#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
8aa38563 335#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
4421a823 336#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
ff366825 337#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz))
4aab5b46 338#endif
e83c5163 339
edaec3fb
JH
340enum object_type {
341 OBJ_BAD = -1,
342 OBJ_NONE = 0,
343 OBJ_COMMIT = 1,
344 OBJ_TREE = 2,
345 OBJ_BLOB = 3,
346 OBJ_TAG = 4,
347 /* 5 for future expansion */
348 OBJ_OFS_DELTA = 6,
349 OBJ_REF_DELTA = 7,
355885d5 350 OBJ_ANY,
4b05548f 351 OBJ_MAX
edaec3fb
JH
352};
353
b45563a2
JH
354static inline enum object_type object_type(unsigned int mode)
355{
356 return S_ISDIR(mode) ? OBJ_TREE :
357 S_ISGITLINK(mode) ? OBJ_COMMIT :
358 OBJ_BLOB;
359}
360
2163e5db 361/* Double-check local_repo_env below if you add to this list. */
8ac069ac 362#define GIT_DIR_ENVIRONMENT "GIT_DIR"
a1bea2c1 363#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
892c41b9 364#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
a6f7f9a3 365#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
8ac069ac 366#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
d19938ab 367#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
bb233d69 368#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
5da5c8f4 369#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
069c0532 370#define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE"
d4ebc36c
JH
371#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
372#define CONFIG_ENVIRONMENT "GIT_CONFIG"
2b64fc89 373#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
d4ebc36c 374#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
0454dd93 375#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
6476b38b 376#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
d0bfd026
JH
377#define GITATTRIBUTES_FILE ".gitattributes"
378#define INFOATTRIBUTES_FILE "info/attributes"
f48fd688 379#define ATTRIBUTE_MACRO_PREFIX "[attr]"
a97a7468
JS
380#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
381#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
894a9d33 382#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
6956f858
TR
383#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
384#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
823ab40f 385#define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS"
bd30c2e4
NTND
386#define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS"
387#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS"
93d93537 388#define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS"
bb233d69 389
48a7c1c4 390/*
2cd83d10
JK
391 * This environment variable is expected to contain a boolean indicating
392 * whether we should or should not treat:
393 *
394 * GIT_DIR=foo.git git ...
395 *
396 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use
397 * of this, but we use it internally to communicate to sub-processes that we
398 * are in a bare repo. If not set, defaults to true.
399 */
400#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
401
48a7c1c4 402/*
2163e5db
JK
403 * Repository-local GIT_* environment variables; these will be cleared
404 * when git spawns a sub-process that runs inside another repository.
405 * The array is NULL-terminated, which makes it easy to pass in the "env"
406 * parameter of a run-command invocation, or to do a simple walk.
48a7c1c4 407 */
2163e5db 408extern const char * const local_repo_env[];
48a7c1c4 409
7d1864ce
JH
410extern int is_bare_repository_cfg;
411extern int is_bare_repository(void);
68025633 412extern int is_inside_git_dir(void);
e90fdc39 413extern char *git_work_tree_cfg;
892c41b9 414extern int is_inside_work_tree(void);
c5fba16c 415extern const char *get_git_dir(void);
b3256eb8 416extern int is_git_directory(const char *path);
8ac069ac
JH
417extern char *get_object_directory(void);
418extern char *get_index_file(void);
5da5c8f4 419extern char *get_graft_file(void);
d7ac12b2 420extern int set_git_dir(const char *path);
a1bea2c1
JT
421extern const char *get_git_namespace(void);
422extern const char *strip_namespace(const char *namespaced_ref);
e90fdc39 423extern const char *get_git_work_tree(void);
13d6ec91 424extern const char *read_gitfile(const char *path);
abc06822 425extern const char *resolve_gitdir(const char *suspect);
19757d80 426extern void set_git_work_tree(const char *tree);
8ac069ac
JH
427
428#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
bb233d69 429
6b5ee137 430extern const char **get_pathspec(const char *prefix, const char **pathspec);
59f0f2f3 431extern void setup_work_tree(void);
4ca06608 432extern const char *setup_git_directory_gently(int *);
d288a700 433extern const char *setup_git_directory(void);
edc54fb5 434extern char *prefix_path(const char *prefix, int len, const char *path);
645a29c4 435extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path);
4ca06608 436extern const char *prefix_filename(const char *prefix, int len, const char *path);
c6e8c800 437extern int check_filename(const char *prefix, const char *name);
023e37c3
MM
438extern void verify_filename(const char *prefix,
439 const char *name,
440 int diagnose_misspelt_rev);
ea92f41f 441extern void verify_non_filename(const char *prefix, const char *name);
546e0fd9 442extern int path_inside_repo(const char *prefix, const char *path);
d288a700 443
f225aeb2
DB
444#define INIT_DB_QUIET 0x0001
445
b57fb80a 446extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
f225aeb2
DB
447extern int init_db(const char *template_dir, unsigned int flags);
448
1d999ddd 449extern void sanitize_stdfds(void);
de0957ce 450extern int daemonize(void);
1d999ddd 451
e83c5163
LT
452#define alloc_nr(x) (((x)+16)*3/2)
453
6815e569
JK
454/*
455 * Realloc the buffer pointed at by variable 'x' so that it can hold
456 * at least 'nr' entries; the number of entries currently allocated
457 * is 'alloc', using the standard growing factor alloc_nr() macro.
458 *
01f6fd4b 459 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
6815e569
JK
460 */
461#define ALLOC_GROW(x, nr, alloc) \
462 do { \
c927e6c6 463 if ((nr) > alloc) { \
4234a761
JH
464 if (alloc_nr(alloc) < (nr)) \
465 alloc = (nr); \
466 else \
467 alloc = alloc_nr(alloc); \
6815e569
JK
468 x = xrealloc((x), alloc * sizeof(*(x))); \
469 } \
98746061 470 } while (0)
6815e569 471
734aab75 472/* Initialize and use the cache information */
03b86647 473struct lock_file;
4aab5b46 474extern int read_index(struct index_state *);
5ab2a2da 475extern int read_index_preload(struct index_state *, const struct pathspec *pathspec);
4aab5b46 476extern int read_index_from(struct index_state *, const char *path);
fa7b3c2f 477extern int is_index_unborn(struct index_state *);
e46bbcf6 478extern int read_index_unmerged(struct index_state *);
03b86647
NTND
479#define COMMIT_LOCK (1 << 0)
480#define CLOSE_LOCK (1 << 1)
481extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
4aab5b46 482extern int discard_index(struct index_state *);
d1f128b0 483extern int unmerged_index(const struct index_state *);
8dcf39c4 484extern int verify_path(const char *path);
db5360f3
ES
485extern struct cache_entry *index_dir_exists(struct index_state *istate, const char *name, int namelen);
486extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
d1f128b0 487extern int index_name_pos(const struct index_state *, const char *name, int namelen);
192268c1
JH
488#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
489#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
b155725d 490#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
af3785dc 491#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
39425819 492#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
ce7c614b 493#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */
4aab5b46 494extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
81dc2307 495extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
4aab5b46 496extern int remove_index_entry_at(struct index_state *, int pos);
36419c8e 497extern void remove_marked_cache_entries(struct index_state *istate);
4aab5b46 498extern int remove_file_from_index(struct index_state *, const char *path);
38ed1d89
JH
499#define ADD_CACHE_VERBOSE 1
500#define ADD_CACHE_PRETEND 2
01665924 501#define ADD_CACHE_IGNORE_ERRORS 4
041aee31 502#define ADD_CACHE_IGNORE_REMOVAL 8
39425819 503#define ADD_CACHE_INTENT 16
38ed1d89
JH
504extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
505extern int add_file_to_index(struct index_state *, const char *path, int flags);
25762726 506extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options);
9c5e6c80 507extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b);
b4b313f9 508extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce);
98fa4738 509extern int index_name_is_other(const struct index_state *, const char *, int);
ff366825 510extern void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *);
4bd5b7da
JH
511
512/* do stat comparison even if CE_VALID is true */
513#define CE_MATCH_IGNORE_VALID 01
514/* do not check the contents but report dirty on racily-clean entries */
56cac48c
NTND
515#define CE_MATCH_RACY_IS_DIRTY 02
516/* do stat comparison even if CE_SKIP_WORKTREE is true */
517#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
2e2e7ec1
BK
518/* ignore non-existent files during stat update */
519#define CE_MATCH_IGNORE_MISSING 0x08
25762726
BK
520/* enable stat refresh */
521#define CE_MATCH_REFRESH 0x10
21a6b9fa
RS
522extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
523extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
4bd5b7da 524
c4ce46fc
JH
525#define HASH_WRITE_OBJECT 1
526#define HASH_FORMAT_CHECK 2
527extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
528extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
c21d39d7
MH
529
530/*
531 * Record to sd the data from st that we use to check whether a file
532 * might have changed.
533 */
534extern void fill_stat_data(struct stat_data *sd, struct stat *st);
535
536/*
537 * Return 0 if st is consistent with a file not having been changed
538 * since sd was filled. If there are differences, return a
539 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
540 * INODE_CHANGED, and DATA_CHANGED.
541 */
542extern int match_stat_data(const struct stat_data *sd, struct stat *st);
543
415e96c8
JH
544extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
545
405e5b2f
LT
546#define REFRESH_REALLY 0x0001 /* ignore_valid */
547#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
548#define REFRESH_QUIET 0x0004 /* be quiet about it */
549#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
3f1b7b60 550#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
43673fdd 551#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
9b2d6149 552extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
405e5b2f 553
021b6e45
JH
554struct lock_file {
555 struct lock_file *next;
4723ee99 556 int fd;
5e635e39 557 pid_t owner;
1084b845 558 char on_list;
021b6e45 559 char filename[PATH_MAX];
415e96c8 560};
acd3b9ec
JH
561#define LOCK_DIE_ON_ERROR 1
562#define LOCK_NODEREF 2
1b018fd9 563extern int unable_to_lock_error(const char *path, int err);
e43a6fd3 564extern NORETURN void unable_to_lock_index_die(const char *path, int err);
40aaae88 565extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
ea3cd5c7 566extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
021b6e45 567extern int commit_lock_file(struct lock_file *);
ccdc4ec3 568extern void update_index_if_able(struct index_state *, struct lock_file *);
30ca07a2
JH
569
570extern int hold_locked_index(struct lock_file *, int);
5e7f56ac 571extern void set_alternate_index_output(const char *);
d6cf61bf 572extern int close_lock_file(struct lock_file *);
021b6e45 573extern void rollback_lock_file(struct lock_file *);
eca35a25 574extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
734aab75 575
2ae1c53b 576/* Environment bits from configuration mechanism */
17712991 577extern int trust_executable_bit;
1ce4790b 578extern int trust_ctime;
c08e4d5b 579extern int check_stat;
9378c161 580extern int quote_path_fully;
78a8d641 581extern int has_symlinks;
dce96489 582extern int minimum_abbrev, default_abbrev;
0a9b88b7 583extern int ignore_case;
5f73076c 584extern int assume_unchanged;
9f0bb90d 585extern int prefer_symlink_refs;
6de08ae6 586extern int log_all_ref_updates;
2f8acdb3 587extern int warn_ambiguous_refs;
25fba78d 588extern int warn_on_object_refname_ambiguity;
457f06d6 589extern int shared_repository;
2ae1c53b 590extern const char *apply_default_whitespace;
86c91f91 591extern const char *apply_default_ignorewhitespace;
64589a03 592extern const char *git_attributes_file;
12f6c308 593extern int zlib_compression_level;
960ccca6
DH
594extern int core_compression_level;
595extern int core_compression_seen;
60bb8b14 596extern size_t packed_git_window_size;
77ccc5bb 597extern size_t packed_git_limit;
18bdec11 598extern size_t delta_base_cache_limit;
15366280 599extern unsigned long big_file_threshold;
568508e7 600extern unsigned long pack_size_limit_cfg;
afc711b8
MH
601
602/*
603 * Do replace refs need to be checked this run? This variable is
604 * initialized to true unless --no-replace-object is used or
605 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some
606 * commands that do not want replace references to be active. As an
607 * optimization it is also set to false if replace references have
608 * been sought but there were none.
609 */
610extern int check_replace_refs;
611
aafe9fba 612extern int fsync_object_files;
671c9b7e 613extern int core_preload_index;
08aefc9e 614extern int core_apply_sparse_checkout;
76759c7d 615extern int precomposed_unicode;
17712991 616
eff80a9f
JH
617/*
618 * The character that begins a commented line in user-editable file
619 * that is subject to stripspace.
620 */
621extern char comment_line_char;
622
9ed36cfa 623enum branch_track {
9188ed89 624 BRANCH_TRACK_UNSPECIFIED = -1,
9ed36cfa
JS
625 BRANCH_TRACK_NEVER = 0,
626 BRANCH_TRACK_REMOTE,
627 BRANCH_TRACK_ALWAYS,
628 BRANCH_TRACK_EXPLICIT,
4b05548f 629 BRANCH_TRACK_OVERRIDE
9ed36cfa
JS
630};
631
c998ae9b
DS
632enum rebase_setup_type {
633 AUTOREBASE_NEVER = 0,
634 AUTOREBASE_LOCAL,
635 AUTOREBASE_REMOTE,
4b05548f 636 AUTOREBASE_ALWAYS
c998ae9b
DS
637};
638
52153747 639enum push_default_type {
52153747
FAG
640 PUSH_DEFAULT_NOTHING = 0,
641 PUSH_DEFAULT_MATCHING,
b55e6775 642 PUSH_DEFAULT_SIMPLE,
53c40311 643 PUSH_DEFAULT_UPSTREAM,
f25950f3
CT
644 PUSH_DEFAULT_CURRENT,
645 PUSH_DEFAULT_UNSPECIFIED
52153747
FAG
646};
647
9ed36cfa 648extern enum branch_track git_branch_track;
c998ae9b 649extern enum rebase_setup_type autorebase;
52153747 650extern enum push_default_type push_default;
9ed36cfa 651
348df166
JS
652enum object_creation_mode {
653 OBJECT_CREATION_USES_HARDLINKS = 0,
4b05548f 654 OBJECT_CREATION_USES_RENAMES = 1
348df166
JS
655};
656
657extern enum object_creation_mode object_creation_mode;
be66a6c4 658
a97a7468
JS
659extern char *notes_ref_name;
660
7f3140cd
JS
661extern int grafts_replace_parents;
662
ab9cb76f
JH
663#define GIT_REPO_VERSION 0
664extern int repository_format_version;
665extern int check_repository_format(void);
666
734aab75
LT
667#define MTIME_CHANGED 0x0001
668#define CTIME_CHANGED 0x0002
669#define OWNER_CHANGED 0x0004
670#define MODE_CHANGED 0x0008
671#define INODE_CHANGED 0x0010
672#define DATA_CHANGED 0x0020
8ae0a8c5 673#define TYPE_CHANGED 0x0040
e83c5163 674
108bebea
AR
675extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
676 __attribute__((format (printf, 3, 4)));
fe2d7776
AR
677extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
678 __attribute__((format (printf, 3, 4)));
aba13e7c
AR
679extern char *git_pathdup(const char *fmt, ...)
680 __attribute__((format (printf, 1, 2)));
21cf3227
HKNN
681extern char *mkpathdup(const char *fmt, ...)
682 __attribute__((format (printf, 1, 2)));
108bebea 683
e83c5163 684/* Return a statically allocated filename matching the sha1 signature */
4ec99bf0
TS
685extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
686extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
0bad611b
HV
687extern char *git_path_submodule(const char *path, const char *fmt, ...)
688 __attribute__((format (printf, 2, 3)));
689
d40d535b
MH
690/*
691 * Return the name of the file in the local object database that would
692 * be used to store a loose object with the specified sha1. The
693 * return value is a pointer to a statically allocated buffer that is
694 * overwritten each time the function is called.
695 */
30d6c6ea 696extern const char *sha1_file_name(const unsigned char *sha1);
d40d535b
MH
697
698/*
699 * Return the name of the (local) packfile with the specified sha1 in
700 * its name. The return value is a pointer to memory that is
701 * overwritten each time this function is called.
702 */
bf592c50 703extern char *sha1_pack_name(const unsigned char *sha1);
d40d535b
MH
704
705/*
706 * Return the name of the (local) pack index file with the specified
707 * sha1 in its name. The return value is a pointer to memory that is
708 * overwritten each time this function is called.
709 */
bf592c50 710extern char *sha1_pack_index_name(const unsigned char *sha1);
d40d535b 711
013f276e 712extern const char *find_unique_abbrev(const unsigned char *sha1, int);
88cd621d 713extern const unsigned char null_sha1[20];
1a812f3a
IM
714
715static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
0bef57ee 716{
1a812f3a
IM
717 int i;
718
719 for (i = 0; i < 20; i++, sha1++, sha2++) {
720 if (*sha1 != *sha2)
721 return *sha1 - *sha2;
722 }
723
724 return 0;
0bef57ee 725}
1a812f3a
IM
726
727static inline int is_null_sha1(const unsigned char *sha1)
a89fccd2 728{
1a812f3a 729 return !hashcmp(sha1, null_sha1);
a89fccd2 730}
1a812f3a 731
e702496e
SP
732static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
733{
734 memcpy(sha_dst, sha_src, 20);
735}
a8e0d16d
JH
736static inline void hashclr(unsigned char *hash)
737{
738 memset(hash, 0, 20);
739}
e83c5163 740
14d9c578
JK
741#define EMPTY_TREE_SHA1_HEX \
742 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
dab0d410 743#define EMPTY_TREE_SHA1_BIN_LITERAL \
14d9c578
JK
744 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
745 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
dab0d410
JN
746#define EMPTY_TREE_SHA1_BIN \
747 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
14d9c578 748
f8582cad
JK
749#define EMPTY_BLOB_SHA1_HEX \
750 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
751#define EMPTY_BLOB_SHA1_BIN_LITERAL \
752 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
753 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
754#define EMPTY_BLOB_SHA1_BIN \
755 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
756
757static inline int is_empty_blob_sha1(const unsigned char *sha1)
758{
759 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
760}
761
f2db68ed
HE
762int git_mkstemp(char *path, size_t n, const char *template);
763
003b33a8
DA
764int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
765
b862b61c
MM
766/* set default permissions by passing mode arguments to open(2) */
767int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
768int git_mkstemp_mode(char *pattern, int mode);
769
06cbe855
HO
770/*
771 * NOTE NOTE NOTE!!
772 *
773 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
774 * not be changed. Old repositories have core.sharedrepository written in
775 * numeric format, and therefore these values are preserved for compatibility
776 * reasons.
777 */
94df2506 778enum sharedrepo {
06cbe855
HO
779 PERM_UMASK = 0,
780 OLD_PERM_GROUP = 1,
781 OLD_PERM_EVERYBODY = 2,
782 PERM_GROUP = 0660,
4b05548f 783 PERM_EVERYBODY = 0664
94df2506
JH
784};
785int git_config_perm(const char *var, const char *value);
3a429d3b 786int adjust_shared_perm(const char *path);
0be0521b
MH
787
788/*
789 * Create the directory containing the named path, using care to be
790 * somewhat safe against races. Return one of the scld_error values
791 * to indicate success/failure.
18d37e86
MH
792 *
793 * SCLD_VANISHED indicates that one of the ancestor directories of the
794 * path existed at one point during the function call and then
795 * suddenly vanished, probably because another process pruned the
796 * directory while we were working. To be robust against this kind of
797 * race, callers might want to try invoking the function again when it
798 * returns SCLD_VANISHED.
0be0521b
MH
799 */
800enum scld_error {
801 SCLD_OK = 0,
802 SCLD_FAILED = -1,
803 SCLD_PERMS = -2,
18d37e86
MH
804 SCLD_EXISTS = -3,
805 SCLD_VANISHED = -4
0be0521b
MH
806};
807enum scld_error safe_create_leading_directories(char *path);
808enum scld_error safe_create_leading_directories_const(const char *path);
809
90a6464b 810int mkdir_in_gitdir(const char *path);
21cf3227 811extern void home_config_paths(char **global, char **xdg, char *file);
395de250 812extern char *expand_user_path(const char *path);
1c64b48e 813const char *enter_repo(const char *path, int strict);
e5392c51
JS
814static inline int is_absolute_path(const char *path)
815{
88135203 816 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
e5392c51 817}
90b4a71c 818int is_directory(const char *);
e2a57aac 819const char *real_path(const char *path);
e3e46cdb 820const char *real_path_if_valid(const char *path);
e2a57aac 821const char *absolute_path(const char *path);
41894ae3 822const char *remove_leading_path(const char *in, const char *prefix);
e02ca72f 823const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);
645a29c4 824int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
f3cad0ad 825int normalize_path_copy(char *dst, const char *src);
31171d9e 826int longest_ancestor_length(const char *path, struct string_list *prefixes);
4fcc86b0 827char *strip_path_suffix(const char *path, const char *suffix);
34b6cb8b 828int daemon_avoid_alias(const char *path);
4bb43de2 829int offset_1st_component(const char *path);
b2cb9425 830
e1111cef 831/* object replacement */
ffe68cf9 832#define LOOKUP_REPLACE_OBJECT 1
5bf29b95 833extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
f5552aee
CC
834static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
835{
ffe68cf9 836 return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);
5bf29b95 837}
1f91e79c
MH
838
839/*
840 * This internal function is only declared here for the benefit of
841 * lookup_replace_object(). Please do not call it directly.
842 */
e1111cef 843extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
1f91e79c
MH
844
845/*
846 * If object sha1 should be replaced, return the replacement object's
847 * name (replaced recursively, if necessary). The return value is
848 * either sha1 or a pointer to a permanently-allocated value. When
849 * object replacement is suppressed, always return sha1.
850 */
e1111cef
JH
851static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
852{
afc711b8 853 if (!check_replace_refs)
e1111cef
JH
854 return sha1;
855 return do_lookup_replace_object(sha1);
f5552aee 856}
1f91e79c 857
bf93eea0
CC
858static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag)
859{
860 if (!(flag & LOOKUP_REPLACE_OBJECT))
861 return sha1;
862 return lookup_replace_object(sha1);
863}
e1111cef 864
e83c5163 865/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
21666f1a 866extern int sha1_object_info(const unsigned char *, unsigned long *);
ce9fbf16 867extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
c00e657d 868extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
21666f1a 869extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
bbac7311 870extern int force_object_loose(const unsigned char *sha1, time_t mtime);
ec73f580 871extern int git_open_noatime(const char *name);
f0270efd 872extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
eb4f4076 873extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
f0270efd 874extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
8237b185 875
0e8189e2
NP
876/* global flag to enable extra checks when accessing packed objects */
877extern int do_check_packed_object_crc;
878
5d6ccf5c 879extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
e83c5163 880
839837b9 881extern int move_temp_to_file(const char *tmpfile, const char *filename);
8237b185 882
cd673c1f 883extern int has_sha1_pack(const unsigned char *sha1);
d40d535b
MH
884
885/*
886 * Return true iff we have an object named sha1, whether local or in
887 * an alternate object database, and whether packed or loose. This
888 * function does not respect replace references.
889 */
8237b185 890extern int has_sha1_file(const unsigned char *sha1);
d40d535b
MH
891
892/*
893 * Return true iff an alternate object database has a loose object
894 * with the specified name. This function does not respect replace
895 * references.
896 */
0f4dc14a 897extern int has_loose_object_nonlocal(const unsigned char *sha1);
8237b185 898
bf592c50
DB
899extern int has_pack_index(const unsigned char *sha1);
900
40d52ff7
JK
901extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
902
192a6be2
LT
903extern const signed char hexval_table[256];
904static inline unsigned int hexval(unsigned char c)
e49521b5
JH
905{
906 return hexval_table[c];
907}
908
e83c5163 909/* Convert to/from hex/sha1 representation */
dce96489
LT
910#define MINIMUM_ABBREV minimum_abbrev
911#define DEFAULT_ABBREV default_abbrev
46a6c262 912
573285e5
CP
913struct object_context {
914 unsigned char tree[20];
915 char path[PATH_MAX];
916 unsigned mode;
917};
918
daba53ae
JH
919#define GET_SHA1_QUIETLY 01
920#define GET_SHA1_COMMIT 02
921#define GET_SHA1_COMMITTISH 04
922#define GET_SHA1_TREE 010
923#define GET_SHA1_TREEISH 020
924#define GET_SHA1_BLOB 040
33bd598c 925#define GET_SHA1_ONLY_TO_DIE 04000
37c00e55 926
3c249c95 927extern int get_sha1(const char *str, unsigned char *sha1);
daba53ae 928extern int get_sha1_commit(const char *str, unsigned char *sha1);
cd74e473 929extern int get_sha1_committish(const char *str, unsigned char *sha1);
daba53ae
JH
930extern int get_sha1_tree(const char *str, unsigned char *sha1);
931extern int get_sha1_treeish(const char *str, unsigned char *sha1);
932extern int get_sha1_blob(const char *str, unsigned char *sha1);
8c135ea2 933extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
33bd598c 934extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);
d4e85a1a 935
957d7406
JH
936typedef int each_abbrev_fn(const unsigned char *sha1, void *);
937extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
d4e85a1a
MH
938
939/*
940 * Try to read a SHA1 in hexadecimal format from the 40 characters
941 * starting at hex. Write the 20-byte result to sha1 in binary form.
942 * Return 0 on success. Reading stops if a NUL is encountered in the
943 * input, so it is safe to pass this function an arbitrary
944 * null-terminated string.
945 */
197ee8c9 946extern int get_sha1_hex(const char *hex, unsigned char *sha1);
d4e85a1a 947
197ee8c9 948extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
dfefa935 949extern int read_ref_full(const char *refname, unsigned char *sha1,
c6893323 950 int reading, int *flags);
dfefa935 951extern int read_ref(const char *refname, unsigned char *sha1);
7cb36842
MH
952
953/*
954 * Resolve a reference, recursively following symbolic refererences.
955 *
956 * Store the referred-to object's name in sha1 and return the name of
957 * the non-symbolic reference that ultimately pointed at it. The
958 * return value, if not NULL, is a pointer into either a static buffer
959 * or the input ref.
960 *
961 * If the reference cannot be resolved to an object, the behavior
962 * depends on the "reading" argument:
963 *
964 * - If reading is set, return NULL.
965 *
966 * - If reading is not set, clear sha1 and return the name of the last
967 * reference name in the chain, which will either be a non-symbolic
968 * reference or an undefined reference. If this is a prelude to
969 * "writing" to the ref, the return value is the name of the ref
970 * that will actually be created or changed.
971 *
972 * If flag is non-NULL, set the value that it points to the
973 * combination of REF_ISPACKED (if the reference was found among the
974 * packed references) and REF_ISSYMREF (if the initial reference was a
975 * symbolic reference).
976 *
977 * If ref is not a properly-formatted, normalized reference, return
978 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
979 * give up and return NULL.
980 *
981 * errno is sometimes set on errors, but not always.
982 */
8cad4744 983extern const char *resolve_ref_unsafe(const char *ref, unsigned char *sha1, int reading, int *flag);
96ec7b1e 984extern char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag);
7cb36842 985
e86eb666 986extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
eb3a4822 987extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
cf99a761 988extern int interpret_branch_name(const char *str, int len, struct strbuf *);
619a644d 989extern int get_sha1_mb(const char *str, unsigned char *sha1);
e86eb666 990
54457fe5
MH
991/*
992 * Return true iff abbrev_name is a possible abbreviation for
993 * full_name according to the rules defined by ref_rev_parse_rules in
994 * refs.c.
995 */
996extern int refname_match(const char *abbrev_name, const char *full_name);
79803322 997
8b5157e4 998extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
c847f537 999extern int validate_headref(const char *ref);
e83c5163 1000
958ba6c9 1001extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
0ab9e1e8 1002extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
79517a06 1003extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
b60e188c 1004extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
e83c5163 1005
40469ee9 1006extern void *read_object_with_reference(const unsigned char *sha1,
bf0f910d 1007 const char *required_type,
40469ee9
JH
1008 unsigned long *size,
1009 unsigned char *sha1_ret);
f4913f91 1010
81776315
JH
1011extern struct object *peel_to_type(const char *name, int namelen,
1012 struct object *o, enum object_type);
1013
73013afd
JH
1014enum date_mode {
1015 DATE_NORMAL = 0,
1016 DATE_RELATIVE,
1017 DATE_SHORT,
1018 DATE_LOCAL,
1019 DATE_ISO8601,
7dff9b30
LT
1020 DATE_RFC2822,
1021 DATE_RAW
73013afd
JH
1022};
1023
f8493ec0 1024const char *show_date(unsigned long time, int timezone, enum date_mode mode);
7d29afd4
JN
1025void show_date_relative(unsigned long time, int tz, const struct timeval *now,
1026 struct strbuf *timebuf);
2a39064c 1027int parse_date(const char *date, char *buf, int bufsize);
9644c061 1028int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
3d27b9b0 1029int parse_expiry_date(const char *date, unsigned long *timestamp);
ecee9d9e 1030void datestamp(char *buf, int bufsize);
93cfa7c7
JH
1031#define approxidate(s) approxidate_careful((s), NULL)
1032unsigned long approxidate_careful(const char *, int *);
33012fc4 1033unsigned long approxidate_relative(const char *date, const struct timeval *now);
856665f8 1034enum date_mode parse_date_format(const char *format);
7ca36d93 1035int date_overflows(unsigned long date);
ecee9d9e 1036
f9bc573f 1037#define IDENT_STRICT 1
b9f0ac17 1038#define IDENT_NO_DATE 2
c15e1987 1039#define IDENT_NO_NAME 4
749be728
JH
1040extern const char *git_author_info(int);
1041extern const char *git_committer_info(int);
798123af 1042extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
d9ccfe77 1043extern const char *fmt_name(const char *name, const char *email);
bcb2b004 1044extern const char *ident_default_email(void);
44fcb497 1045extern const char *git_editor(void);
64778d24 1046extern const char *git_pager(int stdout_is_tty);
9597921b 1047extern int git_ident_config(const char *, const char *, void *);
6aa33f40 1048
4b340cfa
JH
1049struct ident_split {
1050 const char *name_begin;
1051 const char *name_end;
1052 const char *mail_begin;
1053 const char *mail_end;
1054 const char *date_begin;
1055 const char *date_end;
1056 const char *tz_begin;
1057 const char *tz_end;
1058};
1059/*
1060 * Signals an success with 0, but time part of the result may be NULL
1061 * if the input lacks timestamp and zone
1062 */
1063extern int split_ident_line(struct ident_split *, const char *, int);
1064
662cc30c
JK
1065/*
1066 * Compare split idents for equality or strict ordering. Note that we
1067 * compare only the ident part of the line, ignoring any timestamp.
1068 *
1069 * Because there are two fields, we must choose one as the primary key; we
1070 * currently arbitrarily pick the email.
1071 */
1072extern int ident_cmp(const struct ident_split *, const struct ident_split *);
1073
12dccc16 1074struct checkout {
d4a2024a 1075 struct index_state *istate;
12dccc16
LT
1076 const char *base_dir;
1077 int base_dir_len;
1078 unsigned force:1,
1079 quiet:1,
1080 not_new:1,
1081 refresh_cache:1;
1082};
1083
af2a651d 1084#define TEMPORARY_FILENAME_LENGTH 25
efbc5831 1085extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
b9fd2846
LT
1086
1087struct cache_def {
1088 char path[PATH_MAX + 1];
1089 int len;
1090 int flags;
1091 int track_flags;
1092 int prefix_len_stat_func;
1093};
1094
57199892 1095extern int has_symlink_leading_path(const char *name, int len);
b9fd2846 1096extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
f66caaf9 1097extern int check_leading_path(const char *name, int len);
57199892 1098extern int has_dirs_only_path(const char *name, int len, int prefix_len);
78478927
KB
1099extern void schedule_dir_for_removal(const char *name, int len);
1100extern void remove_scheduled_dirs(void);
12dccc16 1101
9a217f2a 1102extern struct alternate_object_database {
d5a63b99 1103 struct alternate_object_database *next;
9a217f2a 1104 char *name;
8f1d2e6f 1105 char base[FLEX_ARRAY]; /* more */
d5a63b99 1106} *alt_odb_list;
9a217f2a 1107extern void prepare_alt_odb(void);
5e73633d 1108extern void read_info_alternates(const char * relative_base, int depth);
bef70b22 1109extern void add_to_alternates_file(const char *reference);
d79796bc
JH
1110typedef int alt_odb_fn(struct alternate_object_database *, void *);
1111extern void foreach_alt_odb(alt_odb_fn, void*);
9a217f2a 1112
c41ee586
SP
1113struct pack_window {
1114 struct pack_window *next;
1115 unsigned char *base;
1116 off_t offset;
1117 size_t len;
1118 unsigned int last_used;
1119 unsigned int inuse_cnt;
1120};
1121
9a217f2a
JH
1122extern struct packed_git {
1123 struct packed_git *next;
c41ee586 1124 struct pack_window *windows;
2dc3a234 1125 off_t pack_size;
57059091
NP
1126 const void *index_data;
1127 size_t index_size;
1128 uint32_t num_objects;
8eca0b47
NP
1129 uint32_t num_bad_objects;
1130 unsigned char *bad_object_sha1;
42873078 1131 int index_version;
57059091 1132 time_t mtime;
9bc879c1 1133 int pack_fd;
8d25931d 1134 unsigned pack_local:1,
d131b7af
SP
1135 pack_keep:1,
1136 do_not_close:1;
bf592c50 1137 unsigned char sha1[20];
8f1d2e6f
JH
1138 /* something like ".git/objects/pack/xxxxx.pack" */
1139 char pack_name[FLEX_ARRAY]; /* more */
9a217f2a 1140} *packed_git;
f3bf9224
JH
1141
1142struct pack_entry {
c4001d92 1143 off_t offset;
f3bf9224
JH
1144 unsigned char sha1[20];
1145 struct packed_git *p;
1146};
1147
7b64469a 1148extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
bf592c50 1149
543c5caa
NTND
1150/* A hook for count-objects to report invalid files in pack directory */
1151extern void (*report_garbage)(const char *desc, const char *path);
1152
9a217f2a 1153extern void prepare_packed_git(void);
fc04c412 1154extern void reprepare_packed_git(void);
bf592c50
DB
1155extern void install_packed_git(struct packed_git *pack);
1156
a6080a0a 1157extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
bf592c50
DB
1158 struct packed_git *packs);
1159
276bc2ca 1160extern void pack_report(void);
d40d535b
MH
1161
1162/*
1163 * mmap the index file for the specified packfile (if it is not
1164 * already mmapped). Return 0 on success.
1165 */
d079837e 1166extern int open_pack_index(struct packed_git *);
d40d535b
MH
1167
1168/*
1169 * munmap the index file for the specified packfile (if it is
1170 * currently mmapped).
1171 */
fa5fc15d 1172extern void close_pack_index(struct packed_git *);
d40d535b 1173
ef49a7a0 1174extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
c9ced051 1175extern void close_pack_windows(struct packed_git *);
03e79c88 1176extern void unuse_pack(struct pack_window **);
c74faea1 1177extern void free_pack_by_name(const char *);
3d20c636 1178extern void clear_delta_base_cache(void);
42873078 1179extern struct packed_git *add_packed_git(const char *, int, int);
d40d535b
MH
1180
1181/*
1182 * Return the SHA-1 of the nth object within the specified packfile.
1183 * Open the index if it is not already open. The return value points
1184 * at the SHA-1 within the mmapped index. Return NULL if there is an
1185 * error.
1186 */
1187extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
1188
1189/*
1190 * Return the offset of the nth object within the specified packfile.
1191 * The index must already be opened.
1192 */
1193extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);
1194
1195/*
1196 * If the object named sha1 is present in the specified packfile,
1197 * return its offset within the packfile; otherwise, return 0.
1198 */
1199extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
1200
4c080182 1201extern int is_pack_valid(struct packed_git *);
c4001d92 1202extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
09ded04b 1203extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
54dab52a 1204extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
f8c8abc5 1205extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
9a217f2a 1206
9a490590
JH
1207struct object_info {
1208 /* Request */
5b086407 1209 enum object_type *typep;
9a490590 1210 unsigned long *sizep;
161f00e7 1211 unsigned long *disk_sizep;
5d642e75 1212 unsigned char *delta_base_sha1;
9a490590
JH
1213
1214 /* Response */
1215 enum {
1216 OI_CACHED,
1217 OI_LOOSE,
5266d369
JH
1218 OI_PACKED,
1219 OI_DBCACHED
9a490590
JH
1220 } whence;
1221 union {
1222 /*
1223 * struct {
1224 * ... Nothing to expose in this case
1225 * } cached;
1226 * struct {
1227 * ... Nothing to expose in this case
1228 * } loose;
1229 */
1230 struct {
1231 struct packed_git *pack;
1232 off_t offset;
1233 unsigned int is_delta;
1234 } packed;
1235 } u;
1236};
de7b5d62 1237extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags);
9a217f2a 1238
8f3f9b09
JH
1239/* Dumb servers support */
1240extern int update_server_info(int);
1241
7a397419
MG
1242/* git_config_parse_key() returns these negated: */
1243#define CONFIG_INVALID_KEY 1
1244#define CONFIG_NO_SECTION_OR_NAME 2
1245/* git_config_set(), git_config_set_multivar() return the above or these: */
1246#define CONFIG_NO_LOCK -1
1247#define CONFIG_INVALID_FILE 3
1248#define CONFIG_NO_WRITE 4
1249#define CONFIG_NOTHING_SET 5
1250#define CONFIG_INVALID_PATTERN 6
9409c7a5 1251#define CONFIG_GENERIC_ERROR 7
7a397419 1252
c8985ce0 1253struct git_config_source {
3caec73b 1254 unsigned int use_stdin:1;
c8985ce0
KS
1255 const char *file;
1256 const char *blob;
1257};
1258
ef90d6d4
JS
1259typedef int (*config_fn_t)(const char *, const char *, void *);
1260extern int git_default_config(const char *, const char *, void *);
1261extern int git_config_from_file(config_fn_t fn, const char *, void *);
1bc88819
HV
1262extern int git_config_from_buf(config_fn_t fn, const char *name,
1263 const char *buf, size_t len, void *data);
2b64fc89 1264extern void git_config_push_parameter(const char *text);
b3d83d9f 1265extern int git_config_from_parameters(config_fn_t fn, void *data);
ef90d6d4 1266extern int git_config(config_fn_t fn, void *);
9b25a0b5 1267extern int git_config_with_options(config_fn_t fn, void *,
c8985ce0 1268 struct git_config_source *config_source,
1bc88819 1269 int respect_includes);
dbdf5854 1270extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
0b87b6e0 1271extern int git_parse_ulong(const char *, unsigned long *);
17712991 1272extern int git_config_int(const char *, const char *);
00160242 1273extern int64_t git_config_int64(const char *, const char *);
0b87b6e0 1274extern unsigned long git_config_ulong(const char *, const char *);
a53f2ec6 1275extern int git_config_bool_or_int(const char *, const char *, int *);
17712991 1276extern int git_config_bool(const char *, const char *);
8420ccd8 1277extern int git_config_maybe_bool(const char *, const char *);
ea5105a5 1278extern int git_config_string(const char **, const char *, const char *);
395de250 1279extern int git_config_pathname(const char **, const char *, const char *);
5ec31182 1280extern int git_config_set_in_file(const char *, const char *, const char *);
10bea152 1281extern int git_config_set(const char *, const char *);
b09c53a3 1282extern int git_config_parse_key(const char *, char **, int *);
4ddba79d 1283extern int git_config_set_multivar(const char *, const char *, const char *, int);
5ec31182 1284extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
0667fcfb 1285extern int git_config_rename_section(const char *, const char *);
42bd39b5 1286extern int git_config_rename_section_in_file(const char *, const char *, const char *);
506b17b1 1287extern const char *git_etc_gitconfig(void);
ef90d6d4 1288extern int check_repository_format_version(const char *var, const char *value, void *cb);
0ef37164 1289extern int git_env_bool(const char *, int);
ab88c363 1290extern int git_config_system(void);
40ea4ed9 1291extern int config_error_nonbool(const char *);
5ded807f 1292#if defined(__GNUC__) && ! defined(__clang__)
a469a101
JK
1293#define config_error_nonbool(s) (config_error_nonbool(s), -1)
1294#endif
a6fa5992
PN
1295extern const char *get_log_output_encoding(void);
1296extern const char *get_commit_output_encoding(void);
1297
2496844b
JK
1298extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1299
9b25a0b5
JK
1300struct config_include_data {
1301 int depth;
1302 config_fn_t fn;
1303 void *data;
1304};
1305#define CONFIG_INCLUDE_INIT { 0 }
1306extern int git_config_include(const char *name, const char *value, void *data);
17712991 1307
1b86bbb0
JK
1308/*
1309 * Match and parse a config key of the form:
1310 *
1311 * section.(subsection.)?key
1312 *
1313 * (i.e., what gets handed to a config_fn_t). The caller provides the section;
1314 * we return -1 if it does not match, 0 otherwise. The subsection and key
1315 * out-parameters are filled by the function (and subsection is NULL if it is
1316 * missing).
1317 */
1318extern int parse_config_key(const char *var,
1319 const char *section,
1320 const char **subsection, int *subsection_len,
1321 const char **key);
1322
d6991cee
JK
1323extern int committer_ident_sufficiently_given(void);
1324extern int author_ident_sufficiently_given(void);
e1b10391 1325
1a8f2741 1326extern const char *git_commit_encoding;
3a55602e 1327extern const char *git_log_output_encoding;
d551a488 1328extern const char *git_mailmap_file;
08610900 1329extern const char *git_mailmap_blob;
4e72dcec 1330
06f59e9f
TT
1331/* IO helper functions */
1332extern void maybe_flush_or_die(FILE *, const char *);
f3123c4a 1333extern int copy_fd(int ifd, int ofd);
1468bd47 1334extern int copy_file(const char *dst, const char *src, int mode);
f7835a25 1335extern int copy_file_with_time(const char *dst, const char *src, int mode);
7230e6d0 1336extern void write_or_die(int fd, const void *buf, size_t count);
6ce4e61f 1337extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
e0814056 1338extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
4c81b03e 1339extern void fsync_or_die(int fd, const char *);
ad897215 1340
2b7ca830
JM
1341extern ssize_t read_in_full(int fd, void *buf, size_t count);
1342extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1343static inline ssize_t write_str_in_full(int fd, const char *str)
1344{
1345 return write_in_full(fd, str, strlen(str));
1346}
1347
f67b45f8
LT
1348/* pager.c */
1349extern void setup_pager(void);
872da32d 1350extern const char *pager_program;
6e9af863 1351extern int pager_in_use(void);
aa086eb8 1352extern int pager_use_color;
ad6c3739 1353extern int term_columns(void);
ec7ff5ba 1354extern int decimal_width(int);
4914c962 1355extern int check_pager_config(const char *cmd);
f67b45f8 1356
ee9601e6 1357extern const char *editor_program;
d3e7da89 1358extern const char *askpass_program;
dfb068be 1359extern const char *excludes_file;
4d87b9c5 1360
051308f6 1361/* base85 */
f9815772
JM
1362int decode_85(char *dst, const char *line, int linelen);
1363void encode_85(char *buf, const unsigned char *data, int bytes);
051308f6 1364
855419f7 1365/* alloc.c */
100c5f3b
LT
1366extern void *alloc_blob_node(void);
1367extern void *alloc_tree_node(void);
1368extern void *alloc_commit_node(void);
1369extern void *alloc_tag_node(void);
1370extern void *alloc_object_node(void);
855419f7
LT
1371extern void alloc_report(void);
1372
6ce4e61f 1373/* trace.c */
28bea9e5 1374__attribute__((format (printf, 1, 2)))
6ce4e61f 1375extern void trace_printf(const char *format, ...);
28bea9e5 1376__attribute__((format (printf, 2, 3)))
b319ce4c 1377extern void trace_argv_printf(const char **argv, const char *format, ...);
a9ca8a85 1378extern void trace_repo_setup(const char *prefix);
39bc5e46 1379extern int trace_want(const char *key);
58babfff
NTND
1380__attribute__((format (printf, 2, 3)))
1381extern void trace_printf_key(const char *key, const char *fmt, ...);
94b3b374 1382extern void trace_strbuf(const char *key, const struct strbuf *buf);
6ce4e61f 1383
bbc30f99 1384void packet_trace_identity(const char *prog);
6ce4e61f 1385
b6ec1d61 1386/* add */
7ae02a30
AR
1387/*
1388 * return 0 if success, 1 - if addition of a file failed and
1389 * ADD_FILES_IGNORE_ERRORS was specified in flags
1390 */
3efe8e43 1391int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags);
b6ec1d61 1392
aecbf914
JH
1393/* diff.c */
1394extern int diff_auto_refresh_index;
1395
68faf689
JH
1396/* match-trees.c */
1397void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
85e51b78 1398void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
68faf689 1399
a9cc857a
JH
1400/*
1401 * whitespace rules.
1402 * used by both diff and apply
f4b05a49 1403 * last two digits are tab width
a9cc857a 1404 */
f4b05a49
JS
1405#define WS_BLANK_AT_EOL 0100
1406#define WS_SPACE_BEFORE_TAB 0200
1407#define WS_INDENT_WITH_NON_TAB 0400
1408#define WS_CR_AT_EOL 01000
1409#define WS_BLANK_AT_EOF 02000
1410#define WS_TAB_IN_INDENT 04000
aeb84b05 1411#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
f4b05a49
JS
1412#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1413#define WS_TAB_WIDTH_MASK 077
cf1b7869
JH
1414extern unsigned whitespace_rule_cfg;
1415extern unsigned whitespace_rule(const char *);
1416extern unsigned parse_whitespace_rule(const char *);
8f8841e9
JH
1417extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1418extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
c1795bb0 1419extern char *whitespace_error_string(unsigned ws);
d511bd33 1420extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
877f23cc 1421extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
f4b05a49 1422#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
a9cc857a 1423
ee425e46 1424/* ls-files */
17ddc66e 1425int report_path_error(const char *ps_matched, const struct pathspec *pathspec, const char *prefix);
ee425e46
JH
1426void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1427
94351118 1428char *alias_lookup(const char *alias);
0989fe96 1429int split_cmdline(char *cmdline, const char ***argv);
ad9ac6db
GB
1430/* Takes a negative value returned by split_cmdline */
1431const char *split_cmdline_strerror(int cmdline_errno);
94351118 1432
e37c1329
NTND
1433/* git.c */
1434struct startup_info {
a60645f9 1435 int have_repository;
f07d6a1a 1436 const char *prefix;
e37c1329
NTND
1437};
1438extern struct startup_info *startup_info;
1439
db699a8a
NTND
1440/* merge.c */
1441struct commit_list;
1442int try_merge_command(const char *strategy, size_t xopts_nr,
1443 const char **xopts, struct commit_list *common,
1444 const char *head_arg, struct commit_list *remotes);
1445int checkout_fast_forward(const unsigned char *from,
1446 const unsigned char *to,
1447 int overwrite_ignore);
1448
cac42b26 1449
38f865c2
JK
1450int sane_execvp(const char *file, char *const argv[]);
1451
38612532
MH
1452/*
1453 * A struct to encapsulate the concept of whether a file has changed
1454 * since we last checked it. This uses criteria similar to those used
1455 * for the index.
1456 */
1457struct stat_validity {
1458 struct stat_data *sd;
1459};
1460
1461void stat_validity_clear(struct stat_validity *sv);
1462
1463/*
1464 * Returns 1 if the path is a regular file (or a symlink to a regular
1465 * file) and matches the saved stat_validity, 0 otherwise. A missing
1466 * or inaccessible file is considered a match if the struct was just
1467 * initialized, or if the previous update found an inaccessible file.
1468 */
1469int stat_validity_check(struct stat_validity *sv, const char *path);
1470
1471/*
1472 * Update the stat_validity from a file opened at descriptor fd. If
1473 * the file is missing, inaccessible, or not a regular file, then
1474 * future calls to stat_validity_check will match iff one of those
1475 * conditions continues to be true.
1476 */
1477void stat_validity_update(struct stat_validity *sv, int fd);
1478
9ef176b5
NTND
1479int versioncmp(const char *s1, const char *s2);
1480
e83c5163 1481#endif /* CACHE_H */