Merge branch 'rs/strbuf-detach'
[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"
ec2dd32c 7#include "list.h"
75194438 8#include "advice.h"
65784830 9#include "gettext.h"
d1bf0e08 10#include "convert.h"
5991a55c 11#include "trace.h"
ee4512ed 12#include "trace2.h"
155ef25f 13#include "string-list.h"
f4015337 14#include "pack-revindex.h"
f18f816c 15#include "hash.h"
e7d72d07 16#include "path.h"
cc817ca3 17#include "sha1-array.h"
78a67668 18#include "repository.h"
8e72d675 19#include "mem-pool.h"
e83c5163 20
9126f009 21#include <zlib.h>
ef49a7a0
JH
22typedef struct git_zstream {
23 z_stream z;
24 unsigned long avail_in;
25 unsigned long avail_out;
26 unsigned long total_in;
27 unsigned long total_out;
28 unsigned char *next_in;
29 unsigned char *next_out;
30} git_zstream;
31
32void git_inflate_init(git_zstream *);
33void git_inflate_init_gzip_only(git_zstream *);
34void git_inflate_end(git_zstream *);
35int git_inflate(git_zstream *, int flush);
36
37void git_deflate_init(git_zstream *, int level);
38void git_deflate_init_gzip(git_zstream *, int level);
c3c2e1a0 39void git_deflate_init_raw(git_zstream *, int level);
ef49a7a0 40void git_deflate_end(git_zstream *);
568508e7 41int git_deflate_abort(git_zstream *);
ef49a7a0
JH
42int git_deflate_end_gently(git_zstream *);
43int git_deflate(git_zstream *, int flush);
44unsigned long git_deflate_bound(git_zstream *, unsigned long);
39c68542 45
962554c6 46#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
b6829693
ET
47#define DTYPE(de) ((de)->d_type)
48#else
0bdd79af
JH
49#undef DT_UNKNOWN
50#undef DT_DIR
51#undef DT_REG
52#undef DT_LNK
b6829693
ET
53#define DT_UNKNOWN 0
54#define DT_DIR 1
55#define DT_REG 2
a15c1c60 56#define DT_LNK 3
b6829693
ET
57#define DTYPE(de) DT_UNKNOWN
58#endif
59
40689ae1
MK
60/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
61#define S_IFINVALID 0030000
62
9eec4795
LT
63/*
64 * A "directory link" is a link to another git directory.
65 *
66 * The value 0160000 is not normally a valid mode, and
67 * also just happens to be S_IFDIR + S_IFLNK
9eec4795 68 */
302b9282
MW
69#define S_IFGITLINK 0160000
70#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
9eec4795 71
72441af7
KS
72/*
73 * Some mode bits are also used internally for computations.
74 *
75 * They *must* not overlap with any valid modes, and they *must* not be emitted
76 * to outside world - i.e. appear on disk or network. In other words, it's just
77 * temporary fields, which we internally use, but they have to stay in-house.
78 *
79 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git
80 * codebase mode is `unsigned int` which is assumed to be at least 32 bits )
81 */
82
83/* used internally in tree-diff */
84#define S_DIFFTREE_IFXMIN_NEQ 0x80000000
85
86
2386d658
LT
87/*
88 * Intensive research over the course of many years has shown that
89 * port 9418 is totally unused by anything else. Or
90 *
91 * Your search - "port 9418" - did not match any documents.
92 *
93 * as www.google.com puts it.
ba8a4970
LT
94 *
95 * This port has been properly assigned for git use by IANA:
96 * git (Assigned-9418) [I06-050728-0001].
97 *
98 * git 9418/tcp git pack transfer service
99 * git 9418/udp git pack transfer service
100 *
101 * with Linus Torvalds <torvalds@osdl.org> as the point of
102 * contact. September 2005.
103 *
104 * See http://www.iana.org/assignments/port-numbers
2386d658
LT
105 */
106#define DEFAULT_GIT_PORT 9418
107
e83c5163
LT
108/*
109 * Basic data structures for the directory cache
e83c5163
LT
110 */
111
112#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
113struct cache_header {
7800c1eb
TG
114 uint32_t hdr_signature;
115 uint32_t hdr_version;
116 uint32_t hdr_entries;
e83c5163
LT
117};
118
9d227781
JH
119#define INDEX_FORMAT_LB 2
120#define INDEX_FORMAT_UB 4
121
e83c5163
LT
122/*
123 * The "cache_time" is just the low 32 bits of the
124 * time. It doesn't matter if it overflows - we only
125 * check it for equality in the 32 bits we save.
126 */
127struct cache_time {
7800c1eb
TG
128 uint32_t sec;
129 uint32_t nsec;
e83c5163
LT
130};
131
c21d39d7
MH
132struct stat_data {
133 struct cache_time sd_ctime;
134 struct cache_time sd_mtime;
135 unsigned int sd_dev;
136 unsigned int sd_ino;
137 unsigned int sd_uid;
138 unsigned int sd_gid;
139 unsigned int sd_size;
140};
141
e83c5163 142struct cache_entry {
8b013788 143 struct hashmap_entry ent;
c21d39d7 144 struct stat_data ce_stat_data;
ccc4feb5 145 unsigned int ce_mode;
7a51ed66 146 unsigned int ce_flags;
8e72d675 147 unsigned int mem_pool_allocated;
b60e188c 148 unsigned int ce_namelen;
5fc2fc8f 149 unsigned int index; /* for link extension */
99d1a986 150 struct object_id oid;
8f1d2e6f 151 char name[FLEX_ARRAY]; /* more */
e83c5163
LT
152};
153
95fd5bf8 154#define CE_STAGEMASK (0x3000)
16ce2e4c 155#define CE_EXTENDED (0x4000)
5f73076c 156#define CE_VALID (0x8000)
aee46198 157#define CE_STAGESHIFT 12
95fd5bf8 158
06aaaa0b 159/*
ce51bf09 160 * Range 0xFFFF0FFF in ce_flags is divided into
06aaaa0b
NTND
161 * two parts: in-memory flags and on-disk ones.
162 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
163 * if you want to save a new flag, add it in
164 * CE_EXTENDED_FLAGS
165 *
166 * In-memory only flags
167 */
2977ffbb
NTND
168#define CE_UPDATE (1 << 16)
169#define CE_REMOVE (1 << 17)
170#define CE_UPTODATE (1 << 18)
171#define CE_ADDED (1 << 19)
a22c6371 172
2977ffbb 173#define CE_HASHED (1 << 20)
883e248b 174#define CE_FSMONITOR_VALID (1 << 21)
2977ffbb
NTND
175#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
176#define CE_CONFLICTED (1 << 23)
7a51ed66 177
2977ffbb 178#define CE_UNPACKED (1 << 24)
2431afbf 179#define CE_NEW_SKIP_WORKTREE (1 << 25)
da165f47 180
e721c154
NTND
181/* used to temporarily mark paths matched by pathspecs */
182#define CE_MATCHED (1 << 26)
183
078a58e8 184#define CE_UPDATE_IN_BASE (1 << 27)
b3c96fb1 185#define CE_STRIP_NAME (1 << 28)
078a58e8 186
06aaaa0b
NTND
187/*
188 * Extended on-disk flags
189 */
2977ffbb
NTND
190#define CE_INTENT_TO_ADD (1 << 29)
191#define CE_SKIP_WORKTREE (1 << 30)
06aaaa0b 192/* CE_EXTENDED2 is for future extension */
9a93c668 193#define CE_EXTENDED2 (1U << 31)
06aaaa0b 194
44a36913 195#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
06aaaa0b
NTND
196
197/*
198 * Safeguard to avoid saving wrong flags:
199 * - CE_EXTENDED2 won't get saved until its semantic is known
200 * - Bits in 0x0000FFFF have been saved in ce_flags already
201 * - Bits in 0x003F0000 are currently in-memory flags
202 */
203#if CE_EXTENDED_FLAGS & 0x803FFFFF
204#error "CE_EXTENDED_FLAGS out of range"
205#endif
206
3e3a4a41 207/* Forward structure decls */
64acde94 208struct pathspec;
3e3a4a41 209struct child_process;
e1f8694f 210struct tree;
64acde94 211
eb7a2f1d
LT
212/*
213 * Copy the sha1 and stat state of a cache entry from one to
214 * another. But we never change the name, or the hash state!
215 */
20d142b4
RS
216static inline void copy_cache_entry(struct cache_entry *dst,
217 const struct cache_entry *src)
eb7a2f1d 218{
419a597f 219 unsigned int state = dst->ce_flags & CE_HASHED;
8e72d675 220 int mem_pool_allocated = dst->mem_pool_allocated;
eb7a2f1d
LT
221
222 /* Don't copy hash chain and name */
8b013788
KB
223 memcpy(&dst->ce_stat_data, &src->ce_stat_data,
224 offsetof(struct cache_entry, name) -
225 offsetof(struct cache_entry, ce_stat_data));
eb7a2f1d
LT
226
227 /* Restore the hash state */
419a597f 228 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state;
8e72d675
JM
229
230 /* Restore the mem_pool_allocated flag */
231 dst->mem_pool_allocated = mem_pool_allocated;
eb7a2f1d
LT
232}
233
b60e188c 234static inline unsigned create_ce_flags(unsigned stage)
7fec10b7 235{
b60e188c 236 return (stage << CE_STAGESHIFT);
7fec10b7
JH
237}
238
b60e188c 239#define ce_namelen(ce) ((ce)->ce_namelen)
aee46198 240#define ce_size(ce) cache_entry_size(ce_namelen(ce))
7a51ed66 241#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
eadb5831 242#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
44a36913 243#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
eadb5831 244#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
895ff3b2 245#define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD)
aee46198 246
e4479470 247#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
8ae0a8c5
KS
248static inline unsigned int create_ce_mode(unsigned int mode)
249{
8ae0a8c5 250 if (S_ISLNK(mode))
7a51ed66 251 return S_IFLNK;
302b9282 252 if (S_ISDIR(mode) || S_ISGITLINK(mode))
7a51ed66
LT
253 return S_IFGITLINK;
254 return S_IFREG | ce_permissions(mode);
8ae0a8c5 255}
20d142b4
RS
256static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce,
257 unsigned int mode)
185c975f 258{
78a8d641
JS
259 extern int trust_executable_bit, has_symlinks;
260 if (!has_symlinks && S_ISREG(mode) &&
7a51ed66 261 ce && S_ISLNK(ce->ce_mode))
78a8d641 262 return ce->ce_mode;
185c975f 263 if (!trust_executable_bit && S_ISREG(mode)) {
7a51ed66 264 if (ce && S_ISREG(ce->ce_mode))
185c975f
JH
265 return ce->ce_mode;
266 return create_ce_mode(0666);
267 }
268 return create_ce_mode(mode);
269}
d6b8fc30
JH
270static inline int ce_to_dtype(const struct cache_entry *ce)
271{
272 unsigned ce_mode = ntohl(ce->ce_mode);
273 if (S_ISREG(ce_mode))
274 return DT_REG;
275 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
276 return DT_DIR;
277 else if (S_ISLNK(ce_mode))
278 return DT_LNK;
279 else
280 return DT_UNKNOWN;
281}
b90d9b88
RS
282static inline unsigned int canon_mode(unsigned int mode)
283{
284 if (S_ISREG(mode))
285 return S_IFREG | ce_permissions(mode);
286 if (S_ISLNK(mode))
287 return S_IFLNK;
288 if (S_ISDIR(mode))
289 return S_IFDIR;
290 return S_IFGITLINK;
291}
e4479470 292
ee7825b5 293#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
f5cabd13 294
e636a7b4
NTND
295#define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */
296#define CE_ENTRY_CHANGED (1 << 1)
297#define CE_ENTRY_REMOVED (1 << 2)
298#define CE_ENTRY_ADDED (1 << 3)
6c306a34 299#define RESOLVE_UNDO_CHANGED (1 << 4)
a5400efe 300#define CACHE_TREE_CHANGED (1 << 5)
c18b80a0 301#define SPLIT_INDEX_ORDERED (1 << 6)
1bbb3dba 302#define UNTRACKED_CHANGED (1 << 7)
883e248b 303#define FSMONITOR_CHANGED (1 << 8)
e636a7b4 304
5fc2fc8f 305struct split_index;
83c094ad
NTND
306struct untracked_cache;
307
228e94f9
JH
308struct index_state {
309 struct cache_entry **cache;
9d227781 310 unsigned int version;
228e94f9 311 unsigned int cache_nr, cache_alloc, cache_changed;
cfc5789a 312 struct string_list *resolve_undo;
228e94f9 313 struct cache_tree *cache_tree;
5fc2fc8f 314 struct split_index *split_index;
fba2f38a 315 struct cache_time timestamp;
913e0e99 316 unsigned name_hash_initialized : 1,
4bddd983 317 initialized : 1,
1956ecd0
BP
318 drop_cache_tree : 1,
319 updated_workdir : 1,
cfd635c7 320 updated_skipworktree : 1,
398a3b08 321 fsmonitor_has_run_once : 1;
8b013788 322 struct hashmap name_hash;
e05881a4 323 struct hashmap dir_hash;
75691ea3 324 struct object_id oid;
83c094ad 325 struct untracked_cache *untracked;
883e248b 326 uint64_t fsmonitor_last_update;
ba1b9cac 327 struct ewah_bitmap *fsmonitor_dirty;
8e72d675 328 struct mem_pool *ce_mem_pool;
228e94f9
JH
329};
330
96872bc2 331/* Name hashing */
55454427
DL
332int test_lazy_init_name_hash(struct index_state *istate, int try_threaded);
333void add_name_hash(struct index_state *istate, struct cache_entry *ce);
334void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
335void free_name_hash(struct index_state *istate);
96872bc2
LT
336
337
a849735b
JM
338/* Cache entry creation and cleanup */
339
340/*
341 * Create cache_entry intended for use in the specified index. Caller
342 * is responsible for discarding the cache_entry with
343 * `discard_cache_entry`.
344 */
345struct cache_entry *make_cache_entry(struct index_state *istate,
346 unsigned int mode,
347 const struct object_id *oid,
348 const char *path,
349 int stage,
350 unsigned int refresh_options);
351
352struct cache_entry *make_empty_cache_entry(struct index_state *istate,
353 size_t name_len);
354
355/*
356 * Create a cache_entry that is not intended to be added to an index.
357 * Caller is responsible for discarding the cache_entry
358 * with `discard_cache_entry`.
359 */
360struct cache_entry *make_transient_cache_entry(unsigned int mode,
361 const struct object_id *oid,
362 const char *path,
363 int stage);
364
365struct cache_entry *make_empty_transient_cache_entry(size_t name_len);
366
367/*
368 * Discard cache entry.
369 */
370void discard_cache_entry(struct cache_entry *ce);
371
8616a2d0
JM
372/*
373 * Check configuration if we should perform extra validation on cache
374 * entries.
375 */
376int should_validate_cache_entries(void);
377
8e72d675
JM
378/*
379 * Duplicate a cache_entry. Allocate memory for the new entry from a
380 * memory_pool. Takes into account cache_entry fields that are meant
381 * for managing the underlying memory allocation of the cache_entry.
382 */
383struct cache_entry *dup_cache_entry(const struct cache_entry *ce, struct index_state *istate);
384
385/*
386 * Validate the cache entries in the index. This is an internal
387 * consistency check that the cache_entry structs are allocated from
388 * the expected memory pool.
389 */
390void validate_cache_entries(const struct index_state *istate);
391
f8adbec9
NTND
392#ifdef USE_THE_INDEX_COMPATIBILITY_MACROS
393extern struct index_state the_index;
394
228e94f9
JH
395#define active_cache (the_index.cache)
396#define active_nr (the_index.cache_nr)
397#define active_alloc (the_index.cache_alloc)
398#define active_cache_changed (the_index.cache_changed)
399#define active_cache_tree (the_index.cache_tree)
e83c5163 400
e1ff0a32 401#define read_cache() repo_read_index(the_repository)
a125a223 402#define read_cache_from(path) read_index_from(&the_index, (path), (get_git_dir()))
e1ff0a32 403#define read_cache_preload(pathspec) repo_read_index_preload(the_repository, (pathspec), 0)
fa7b3c2f 404#define is_cache_unborn() is_index_unborn(&the_index)
e1ff0a32 405#define read_cache_unmerged() repo_read_index_unmerged(the_repository)
4aab5b46 406#define discard_cache() discard_index(&the_index)
94a5728c 407#define unmerged_cache() unmerged_index(&the_index)
4aab5b46
JH
408#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
409#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
81dc2307 410#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
4aab5b46
JH
411#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
412#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
610d55af
TG
413#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
414#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
d9d70966 415#define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip))
3deffc52 416#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
4bd5b7da
JH
417#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
418#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
db5360f3
ES
419#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen))
420#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase))
98fa4738 421#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
cfc5789a 422#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
8aa38563 423#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
4421a823 424#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
ff366825 425#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz))
3a95f31d 426#define hold_locked_index(lock_file, flags) repo_hold_locked_index(the_repository, (lock_file), (flags))
4aab5b46 427#endif
e83c5163 428
fd9b1bae
NTND
429#define TYPE_BITS 3
430
011b6486
NTND
431/*
432 * Values in this enum (except those outside the 3 bit range) are part
433 * of pack file format. See Documentation/technical/pack-format.txt
434 * for more information.
435 */
edaec3fb
JH
436enum object_type {
437 OBJ_BAD = -1,
438 OBJ_NONE = 0,
439 OBJ_COMMIT = 1,
440 OBJ_TREE = 2,
441 OBJ_BLOB = 3,
442 OBJ_TAG = 4,
443 /* 5 for future expansion */
444 OBJ_OFS_DELTA = 6,
445 OBJ_REF_DELTA = 7,
355885d5 446 OBJ_ANY,
4b05548f 447 OBJ_MAX
edaec3fb
JH
448};
449
b45563a2
JH
450static inline enum object_type object_type(unsigned int mode)
451{
452 return S_ISDIR(mode) ? OBJ_TREE :
453 S_ISGITLINK(mode) ? OBJ_COMMIT :
454 OBJ_BLOB;
455}
456
2163e5db 457/* Double-check local_repo_env below if you add to this list. */
8ac069ac 458#define GIT_DIR_ENVIRONMENT "GIT_DIR"
c7b3a3d2 459#define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR"
a1bea2c1 460#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
892c41b9 461#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
a6f7f9a3 462#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
74866d75 463#define GIT_SUPER_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUPER_PREFIX"
8ac069ac 464#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
d19938ab 465#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
bb233d69 466#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
5da5c8f4 467#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
069c0532 468#define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE"
d4ebc36c
JH
469#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
470#define CONFIG_ENVIRONMENT "GIT_CONFIG"
2b64fc89 471#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
d4ebc36c 472#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
0454dd93 473#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
6476b38b 474#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
58d121b2 475#define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE"
d0bfd026
JH
476#define GITATTRIBUTES_FILE ".gitattributes"
477#define INFOATTRIBUTES_FILE "info/attributes"
f48fd688 478#define ATTRIBUTE_MACRO_PREFIX "[attr]"
4c0eeafe 479#define GITMODULES_FILE ".gitmodules"
b5c259f2
AO
480#define GITMODULES_INDEX ":.gitmodules"
481#define GITMODULES_HEAD "HEAD:.gitmodules"
a97a7468
JS
482#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
483#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
894a9d33 484#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
6956f858
TR
485#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
486#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
823ab40f 487#define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS"
bd30c2e4
NTND
488#define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS"
489#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS"
93d93537 490#define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS"
e34c2e01 491#define GIT_QUARANTINE_ENVIRONMENT "GIT_QUARANTINE_PATH"
27344d6a 492#define GIT_OPTIONAL_LOCKS_ENVIRONMENT "GIT_OPTIONAL_LOCKS"
226c0ddd 493#define GIT_TEXT_DOMAIN_DIR_ENVIRONMENT "GIT_TEXTDOMAINDIR"
bb233d69 494
373d70ef
BW
495/*
496 * Environment variable used in handshaking the wire protocol.
497 * Contains a colon ':' separated list of keys with optional values
498 * 'key[=value]'. Presence of unknown keys and values must be
499 * ignored.
500 */
501#define GIT_PROTOCOL_ENVIRONMENT "GIT_PROTOCOL"
19113a26
BW
502/* HTTP header used to handshake the wire protocol */
503#define GIT_PROTOCOL_HEADER "Git-Protocol"
373d70ef 504
48a7c1c4 505/*
2cd83d10
JK
506 * This environment variable is expected to contain a boolean indicating
507 * whether we should or should not treat:
508 *
509 * GIT_DIR=foo.git git ...
510 *
511 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use
512 * of this, but we use it internally to communicate to sub-processes that we
513 * are in a bare repo. If not set, defaults to true.
514 */
515#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
516
48a7c1c4 517/*
2163e5db
JK
518 * Repository-local GIT_* environment variables; these will be cleared
519 * when git spawns a sub-process that runs inside another repository.
520 * The array is NULL-terminated, which makes it easy to pass in the "env"
521 * parameter of a run-command invocation, or to do a simple walk.
48a7c1c4 522 */
2163e5db 523extern const char * const local_repo_env[];
48a7c1c4 524
55454427 525void setup_git_env(const char *git_dir);
73f192c9 526
b9605bc4
JK
527/*
528 * Returns true iff we have a configured git repository (either via
529 * setup_git_directory, or in the environment via $GIT_DIR).
530 */
531int have_git_dir(void);
532
7d1864ce 533extern int is_bare_repository_cfg;
55454427
DL
534int is_bare_repository(void);
535int is_inside_git_dir(void);
e90fdc39 536extern char *git_work_tree_cfg;
55454427
DL
537int is_inside_work_tree(void);
538const char *get_git_dir(void);
539const char *get_git_common_dir(void);
540char *get_object_directory(void);
541char *get_index_file(void);
542char *get_graft_file(struct repository *r);
543void set_git_dir(const char *path);
544int get_common_dir_noenv(struct strbuf *sb, const char *gitdir);
545int get_common_dir(struct strbuf *sb, const char *gitdir);
546const char *get_git_namespace(void);
547const char *strip_namespace(const char *namespaced_ref);
548const char *get_super_prefix(void);
549const char *get_git_work_tree(void);
a93bedad 550
ffd036b1
JK
551/*
552 * Return true if the given path is a git directory; note that this _just_
553 * looks at the directory itself. If you want to know whether "foo/.git"
554 * is a repository, you must feed that path, not just "foo".
555 */
55454427 556int is_git_directory(const char *path);
ffd036b1
JK
557
558/*
559 * Return 1 if the given path is the root of a git repository or
560 * submodule, else 0. Will not return 1 for bare repositories with the
561 * exception of creating a bare repository in "foo/.git" and calling
562 * is_git_repository("foo").
563 *
564 * If we run into read errors, we err on the side of saying "yes, it is",
565 * as we usually consider sub-repos precious, and would prefer to err on the
566 * side of not disrupting or deleting them.
567 */
55454427 568int is_nonbare_repository_dir(struct strbuf *path);
ffd036b1 569
a93bedad
EE
570#define READ_GITFILE_ERR_STAT_FAILED 1
571#define READ_GITFILE_ERR_NOT_A_FILE 2
572#define READ_GITFILE_ERR_OPEN_FAILED 3
573#define READ_GITFILE_ERR_READ_FAILED 4
574#define READ_GITFILE_ERR_INVALID_FORMAT 5
575#define READ_GITFILE_ERR_NO_PATH 6
576#define READ_GITFILE_ERR_NOT_A_REPO 7
921bdd96 577#define READ_GITFILE_ERR_TOO_LARGE 8
55454427
DL
578void read_gitfile_error_die(int error_code, const char *path, const char *dir);
579const char *read_gitfile_gently(const char *path, int *return_error_code);
a93bedad 580#define read_gitfile(path) read_gitfile_gently((path), NULL)
55454427 581const char *resolve_gitdir_gently(const char *suspect, int *return_error_code);
40d96325
SB
582#define resolve_gitdir(path) resolve_gitdir_gently((path), NULL)
583
55454427 584void set_git_work_tree(const char *tree);
8ac069ac
JH
585
586#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
bb233d69 587
55454427 588void setup_work_tree(void);
16ac8b8d 589/*
d3fb71b3
BW
590 * Find the commondir and gitdir of the repository that contains the current
591 * working directory, without changing the working directory or other global
592 * state. The result is appended to commondir and gitdir. If the discovered
593 * gitdir does not correspond to a worktree, then 'commondir' and 'gitdir' will
594 * both have the same result appended to the buffer. The return value is
595 * either 0 upon success and non-zero if no repository was found.
16ac8b8d 596 */
55454427 597int discover_git_directory(struct strbuf *commondir,
ad6dad09 598 struct strbuf *gitdir);
55454427
DL
599const char *setup_git_directory_gently(int *);
600const char *setup_git_directory(void);
601char *prefix_path(const char *prefix, int len, const char *path);
602char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path);
59801976
JK
603
604/*
605 * Concatenate "prefix" (if len is non-zero) and "path", with no
606 * connecting characters (so "prefix" should end with a "/").
607 * Unlike prefix_path, this should be used if the named file does
608 * not have to interact with index entry; i.e. name of a random file
609 * on the filesystem.
610 *
e4da43b1
JK
611 * The return value is always a newly allocated string (even if the
612 * prefix was empty).
59801976 613 */
55454427 614char *prefix_filename(const char *prefix, const char *path);
59801976 615
55454427
DL
616int check_filename(const char *prefix, const char *name);
617void verify_filename(const char *prefix,
ad6dad09
DL
618 const char *name,
619 int diagnose_misspelt_rev);
55454427
DL
620void verify_non_filename(const char *prefix, const char *name);
621int path_inside_repo(const char *prefix, const char *path);
d288a700 622
f225aeb2 623#define INIT_DB_QUIET 0x0001
33158701 624#define INIT_DB_EXIST_OK 0x0002
f225aeb2 625
55454427 626int init_db(const char *git_dir, const char *real_git_dir,
ad6dad09 627 const char *template_dir, unsigned int flags);
f225aeb2 628
55454427
DL
629void sanitize_stdfds(void);
630int daemonize(void);
1d999ddd 631
e83c5163
LT
632#define alloc_nr(x) (((x)+16)*3/2)
633
6815e569
JK
634/*
635 * Realloc the buffer pointed at by variable 'x' so that it can hold
636 * at least 'nr' entries; the number of entries currently allocated
637 * is 'alloc', using the standard growing factor alloc_nr() macro.
638 *
5a133e8a
MD
639 * Consider using ALLOC_GROW_BY instead of ALLOC_GROW as it has some
640 * added niceties.
641 *
01f6fd4b 642 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
6815e569
JK
643 */
644#define ALLOC_GROW(x, nr, alloc) \
645 do { \
c927e6c6 646 if ((nr) > alloc) { \
4234a761
JH
647 if (alloc_nr(alloc) < (nr)) \
648 alloc = (nr); \
649 else \
650 alloc = alloc_nr(alloc); \
2756ca43 651 REALLOC_ARRAY(x, alloc); \
6815e569 652 } \
98746061 653 } while (0)
6815e569 654
5a133e8a
MD
655/*
656 * Similar to ALLOC_GROW but handles updating of the nr value and
657 * zeroing the bytes of the newly-grown array elements.
658 *
659 * DO NOT USE any expression with side-effect for any of the
660 * arguments.
661 */
662#define ALLOC_GROW_BY(x, nr, increase, alloc) \
663 do { \
664 if (increase) { \
665 size_t new_nr = nr + (increase); \
666 if (new_nr < nr) \
667 BUG("negative growth in ALLOC_GROW_BY"); \
668 ALLOC_GROW(x, new_nr, alloc); \
669 memset((x) + nr, 0, sizeof(*(x)) * (increase)); \
670 nr = new_nr; \
671 } \
672 } while (0)
673
734aab75 674/* Initialize and use the cache information */
03b86647 675struct lock_file;
55454427 676void preload_index(struct index_state *index,
ad6dad09
DL
677 const struct pathspec *pathspec,
678 unsigned int refresh_flags);
55454427 679int do_read_index(struct index_state *istate, const char *path,
ad6dad09 680 int must_exist); /* for testting only! */
55454427 681int read_index_from(struct index_state *, const char *path,
ad6dad09 682 const char *gitdir);
55454427 683int is_index_unborn(struct index_state *);
8dc38346
684
685/* For use with `write_locked_index()`. */
03b86647 686#define COMMIT_LOCK (1 << 0)
61000814 687#define SKIP_IF_UNCHANGED (1 << 1)
8dc38346
688
689/*
812d6b00
690 * Write the index while holding an already-taken lock. Close the lock,
691 * and if `COMMIT_LOCK` is given, commit it.
8dc38346
692 *
693 * Unless a split index is in use, write the index into the lockfile.
694 *
695 * With a split index, write the shared index to a temporary file,
696 * adjust its permissions and rename it into place, then write the
697 * split index to the lockfile. If the temporary file for the shared
698 * index cannot be created, fall back to the behavior described in
699 * the previous paragraph.
df60cf57
700 *
701 * With `COMMIT_LOCK`, the lock is always committed or rolled back.
702 * Without it, the lock is closed, but neither committed nor rolled
703 * back.
61000814
704 *
705 * If `SKIP_IF_UNCHANGED` is given and the index is unchanged, nothing
706 * is written (and the lock is rolled back if `COMMIT_LOCK` is given).
8dc38346 707 */
55454427 708int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
8dc38346 709
55454427
DL
710int discard_index(struct index_state *);
711void move_index_extensions(struct index_state *dst, struct index_state *src);
712int unmerged_index(const struct index_state *);
b101793c
EN
713
714/**
e1f8694f
EN
715 * Returns 1 if istate differs from tree, 0 otherwise. If tree is NULL,
716 * compares istate to HEAD. If tree is NULL and on an unborn branch,
717 * returns 1 if there are entries in istate, 0 otherwise. If an strbuf is
718 * provided, the space-separated list of files that differ will be appended
719 * to it.
b101793c 720 */
55454427 721int repo_index_has_changes(struct repository *repo,
ad6dad09
DL
722 struct tree *tree,
723 struct strbuf *sb);
b101793c 724
55454427
DL
725int verify_path(const char *path, unsigned mode);
726int strcmp_offset(const char *s1, const char *s2, size_t *first_change);
727int index_dir_exists(struct index_state *istate, const char *name, int namelen);
728void adjust_dirname_case(struct index_state *istate, char *name);
729struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
12733e9d
SB
730
731/*
732 * Searches for an entry defined by name and namelen in the given index.
733 * If the return value is positive (including 0) it is the position of an
734 * exact match. If the return value is negative, the negated value minus 1
735 * is the position where the entry would be inserted.
736 * Example: The current index consists of these files and its stages:
737 *
738 * b#0, d#0, f#1, f#3
739 *
740 * index_name_pos(&index, "a", 1) -> -1
741 * index_name_pos(&index, "b", 1) -> 0
742 * index_name_pos(&index, "c", 1) -> -2
743 * index_name_pos(&index, "d", 1) -> 1
744 * index_name_pos(&index, "e", 1) -> -3
745 * index_name_pos(&index, "f", 1) -> -3
746 * index_name_pos(&index, "g", 1) -> -5
747 */
55454427 748int index_name_pos(const struct index_state *, const char *name, int namelen);
12733e9d 749
192268c1
JH
750#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
751#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
b155725d 752#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
af3785dc 753#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
39425819 754#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
ce7c614b 755#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */
9e5da3d0 756#define ADD_CACHE_RENORMALIZE 64 /* Pass along HASH_RENORMALIZE */
55454427
DL
757int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
758void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
3bd72adf
SB
759
760/* Remove entry, return true if there are more entries to go. */
55454427 761int remove_index_entry_at(struct index_state *, int pos);
3bd72adf 762
55454427
DL
763void remove_marked_cache_entries(struct index_state *istate, int invalidate);
764int remove_file_from_index(struct index_state *, const char *path);
38ed1d89
JH
765#define ADD_CACHE_VERBOSE 1
766#define ADD_CACHE_PRETEND 2
01665924 767#define ADD_CACHE_IGNORE_ERRORS 4
041aee31 768#define ADD_CACHE_IGNORE_REMOVAL 8
39425819 769#define ADD_CACHE_INTENT 16
20cf41d0
SB
770/*
771 * These two are used to add the contents of the file at path
772 * to the index, marking the working tree up-to-date by storing
773 * the cached stat info in the resulting cache entry. A caller
774 * that has already run lstat(2) on the path can call
775 * add_to_index(), and all others can call add_file_to_index();
776 * the latter will do necessary lstat(2) internally before
777 * calling the former.
778 */
55454427
DL
779int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
780int add_file_to_index(struct index_state *, const char *path, int flags);
20cf41d0 781
55454427
DL
782int chmod_index_entry(struct index_state *, struct cache_entry *ce, char flip);
783int ce_same_name(const struct cache_entry *a, const struct cache_entry *b);
784void set_object_name_for_intent_to_add_entry(struct cache_entry *ce);
785int index_name_is_other(const struct index_state *, const char *, int);
786void *read_blob_data_from_index(const struct index_state *, const char *, unsigned long *);
4bd5b7da
JH
787
788/* do stat comparison even if CE_VALID is true */
789#define CE_MATCH_IGNORE_VALID 01
790/* do not check the contents but report dirty on racily-clean entries */
56cac48c
NTND
791#define CE_MATCH_RACY_IS_DIRTY 02
792/* do stat comparison even if CE_SKIP_WORKTREE is true */
793#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
2e2e7ec1
BK
794/* ignore non-existent files during stat update */
795#define CE_MATCH_IGNORE_MISSING 0x08
25762726
BK
796/* enable stat refresh */
797#define CE_MATCH_REFRESH 0x10
883e248b
BP
798/* don't refresh_fsmonitor state or do stat comparison even if CE_FSMONITOR_VALID is true */
799#define CE_MATCH_IGNORE_FSMONITOR 0X20
55454427 800int is_racy_timestamp(const struct index_state *istate,
ad6dad09 801 const struct cache_entry *ce);
55454427
DL
802int ie_match_stat(struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
803int ie_modified(struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
4bd5b7da 804
c4ce46fc
JH
805#define HASH_WRITE_OBJECT 1
806#define HASH_FORMAT_CHECK 2
9472935d 807#define HASH_RENORMALIZE 4
55454427
DL
808int index_fd(struct index_state *istate, struct object_id *oid, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
809int index_path(struct index_state *istate, struct object_id *oid, const char *path, struct stat *st, unsigned flags);
c21d39d7
MH
810
811/*
812 * Record to sd the data from st that we use to check whether a file
813 * might have changed.
814 */
55454427 815void fill_stat_data(struct stat_data *sd, struct stat *st);
c21d39d7
MH
816
817/*
818 * Return 0 if st is consistent with a file not having been changed
819 * since sd was filled. If there are differences, return a
820 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
821 * INODE_CHANGED, and DATA_CHANGED.
822 */
55454427
DL
823int match_stat_data(const struct stat_data *sd, struct stat *st);
824int match_stat_data_racy(const struct index_state *istate,
ad6dad09 825 const struct stat_data *sd, struct stat *st);
c21d39d7 826
d4c0a3ac 827void fill_stat_cache_info(struct index_state *istate, struct cache_entry *ce, struct stat *st);
415e96c8 828
405e5b2f
LT
829#define REFRESH_REALLY 0x0001 /* ignore_valid */
830#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
831#define REFRESH_QUIET 0x0004 /* be quiet about it */
832#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
3f1b7b60 833#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
43673fdd 834#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
ae9af122 835#define REFRESH_PROGRESS 0x0040 /* show progress bar if stderr is tty */
55454427
DL
836int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
837struct cache_entry *refresh_cache_entry(struct index_state *, struct cache_entry *, unsigned int);
405e5b2f 838
55454427 839void set_alternate_index_output(const char *);
697cc8ef 840
a33fc72f 841extern int verify_index_checksum;
00ec50e5 842extern int verify_ce_order;
a33fc72f 843
2ae1c53b 844/* Environment bits from configuration mechanism */
17712991 845extern int trust_executable_bit;
1ce4790b 846extern int trust_ctime;
c08e4d5b 847extern int check_stat;
9378c161 848extern int quote_path_fully;
78a8d641 849extern int has_symlinks;
dce96489 850extern int minimum_abbrev, default_abbrev;
0a9b88b7 851extern int ignore_case;
5f73076c 852extern int assume_unchanged;
9f0bb90d 853extern int prefer_symlink_refs;
2f8acdb3 854extern int warn_ambiguous_refs;
25fba78d 855extern int warn_on_object_refname_ambiguity;
2ae1c53b 856extern const char *apply_default_whitespace;
86c91f91 857extern const char *apply_default_ignorewhitespace;
64589a03 858extern const char *git_attributes_file;
867ad08a 859extern const char *git_hooks_path;
12f6c308 860extern int zlib_compression_level;
960ccca6 861extern int core_compression_level;
8de7eeb5 862extern int pack_compression_level;
60bb8b14 863extern size_t packed_git_window_size;
77ccc5bb 864extern size_t packed_git_limit;
18bdec11 865extern size_t delta_base_cache_limit;
15366280 866extern unsigned long big_file_threshold;
568508e7 867extern unsigned long pack_size_limit_cfg;
afc711b8 868
4543926b
JK
869/*
870 * Accessors for the core.sharedrepository config which lazy-load the value
871 * from the config (if not already set). The "reset" function can be
872 * used to unset "set" or cached value, meaning that the value will be loaded
873 * fresh from the config file on the next call to get_shared_repository().
874 */
7875acb6
JK
875void set_shared_repository(int value);
876int get_shared_repository(void);
4543926b 877void reset_shared_repository(void);
7875acb6 878
afc711b8
MH
879/*
880 * Do replace refs need to be checked this run? This variable is
881 * initialized to true unless --no-replace-object is used or
882 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some
72470aa3 883 * commands that do not want replace references to be active.
afc711b8 884 */
6ebd1caf 885extern int read_replace_refs;
58d121b2 886extern char *git_replace_ref_base;
afc711b8 887
aafe9fba 888extern int fsync_object_files;
671c9b7e 889extern int core_preload_index;
08aefc9e 890extern int core_apply_sparse_checkout;
76759c7d 891extern int precomposed_unicode;
a42643aa 892extern int protect_hfs;
2b4c6efc 893extern int protect_ntfs;
883e248b 894extern const char *core_fsmonitor;
17712991 895
49672f26
JK
896/*
897 * Include broken refs in all ref iterations, which will
898 * generally choke dangerous operations rather than letting
899 * them silently proceed without taking the broken ref into
900 * account.
901 */
902extern int ref_paranoia;
903
27344d6a
JK
904/*
905 * Returns the boolean value of $GIT_OPTIONAL_LOCKS (or the default value).
906 */
907int use_optional_locks(void);
908
eff80a9f
JH
909/*
910 * The character that begins a commented line in user-editable file
911 * that is subject to stripspace.
912 */
913extern char comment_line_char;
84c9dc2c 914extern int auto_comment_line_char;
eff80a9f 915
341fb286
CW
916enum log_refs_config {
917 LOG_REFS_UNSET = -1,
918 LOG_REFS_NONE = 0,
919 LOG_REFS_NORMAL,
920 LOG_REFS_ALWAYS
921};
922extern enum log_refs_config log_all_ref_updates;
923
c998ae9b
DS
924enum rebase_setup_type {
925 AUTOREBASE_NEVER = 0,
926 AUTOREBASE_LOCAL,
927 AUTOREBASE_REMOTE,
4b05548f 928 AUTOREBASE_ALWAYS
c998ae9b
DS
929};
930
52153747 931enum push_default_type {
52153747
FAG
932 PUSH_DEFAULT_NOTHING = 0,
933 PUSH_DEFAULT_MATCHING,
b55e6775 934 PUSH_DEFAULT_SIMPLE,
53c40311 935 PUSH_DEFAULT_UPSTREAM,
f25950f3
CT
936 PUSH_DEFAULT_CURRENT,
937 PUSH_DEFAULT_UNSPECIFIED
52153747
FAG
938};
939
c998ae9b 940extern enum rebase_setup_type autorebase;
52153747 941extern enum push_default_type push_default;
9ed36cfa 942
348df166
JS
943enum object_creation_mode {
944 OBJECT_CREATION_USES_HARDLINKS = 0,
4b05548f 945 OBJECT_CREATION_USES_RENAMES = 1
348df166
JS
946};
947
948extern enum object_creation_mode object_creation_mode;
be66a6c4 949
a97a7468
JS
950extern char *notes_ref_name;
951
7f3140cd
JS
952extern int grafts_replace_parents;
953
00a09d57
JK
954/*
955 * GIT_REPO_VERSION is the version we write by default. The
956 * _READ variant is the highest number we know how to
957 * handle.
958 */
ab9cb76f 959#define GIT_REPO_VERSION 0
00a09d57 960#define GIT_REPO_VERSION_READ 1
067fbd41 961extern int repository_format_precious_objects;
58b284a2 962extern int repository_format_worktree_config;
4b0d1eeb 963
e8805af1
964/*
965 * You _have_ to initialize a `struct repository_format` using
966 * `= REPOSITORY_FORMAT_INIT` before calling `read_repository_format()`.
967 */
2cc7c2c7
JK
968struct repository_format {
969 int version;
970 int precious_objects;
75b97fec 971 char *partial_clone; /* value of extensions.partialclone */
58b284a2 972 int worktree_config;
2cc7c2c7 973 int is_bare;
78a67668 974 int hash_algo;
2cc7c2c7
JK
975 char *work_tree;
976 struct string_list unknown_extensions;
977};
978
e8805af1
979/*
980 * Always use this to initialize a `struct repository_format`
981 * to a well-defined, default state before calling
982 * `read_repository()`.
983 */
984#define REPOSITORY_FORMAT_INIT \
985{ \
986 .version = -1, \
987 .is_bare = -1, \
988 .hash_algo = GIT_HASH_SHA1, \
989 .unknown_extensions = STRING_LIST_INIT_DUP, \
990}
991
2cc7c2c7
JK
992/*
993 * Read the repository format characteristics from the config file "path" into
e8805af1
994 * "format" struct. Returns the numeric version. On error, or if no version is
995 * found in the configuration, -1 is returned, format->version is set to -1,
996 * and all other fields in the struct are set to the default configuration
997 * (REPOSITORY_FORMAT_INIT). Always initialize the struct using
998 * REPOSITORY_FORMAT_INIT before calling this function.
2cc7c2c7
JK
999 */
1000int read_repository_format(struct repository_format *format, const char *path);
1001
e8805af1
1002/*
1003 * Free the memory held onto by `format`, but not the struct itself.
1004 * (No need to use this after `read_repository_format()` fails.)
1005 */
1006void clear_repository_format(struct repository_format *format);
1007
2cc7c2c7
JK
1008/*
1009 * Verify that the repository described by repository_format is something we
1010 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe
1011 * any errors encountered.
1012 */
1013int verify_repository_format(const struct repository_format *format,
1014 struct strbuf *err);
1015
4b0d1eeb
JK
1016/*
1017 * Check the repository format version in the path found in get_git_dir(),
1018 * and die if it is a version we don't understand. Generally one would
1019 * set_git_dir() before calling this, and use it only for "are we in a valid
1020 * repo?".
1021 */
55454427 1022void check_repository_format(void);
ab9cb76f 1023
734aab75
LT
1024#define MTIME_CHANGED 0x0001
1025#define CTIME_CHANGED 0x0002
1026#define OWNER_CHANGED 0x0004
1027#define MODE_CHANGED 0x0008
1028#define INODE_CHANGED 0x0010
1029#define DATA_CHANGED 0x0020
8ae0a8c5 1030#define TYPE_CHANGED 0x0040
e83c5163 1031
af49c6d0
JK
1032/*
1033 * Return an abbreviated sha1 unique within this repository's object database.
1034 * The result will be at least `len` characters long, and will be NUL
1035 * terminated.
1036 *
ef2ed501
JK
1037 * The non-`_r` version returns a static buffer which remains valid until 4
1038 * more calls to find_unique_abbrev are made.
af49c6d0
JK
1039 *
1040 * The `_r` variant writes to a buffer supplied by the caller, which must be at
aab9583f 1041 * least `GIT_MAX_HEXSZ + 1` bytes. The return value is the number of bytes
af49c6d0
JK
1042 * written (excluding the NUL terminator).
1043 *
1044 * Note that while this version avoids the static buffer, it is not fully
1045 * reentrant, as it calls into other non-reentrant git code.
1046 */
8bb95572
NTND
1047const char *repo_find_unique_abbrev(struct repository *r, const struct object_id *oid, int len);
1048#define find_unique_abbrev(oid, len) repo_find_unique_abbrev(the_repository, oid, len)
1049int repo_find_unique_abbrev_r(struct repository *r, char *hex, const struct object_id *oid, int len);
1050#define find_unique_abbrev_r(hex, oid, len) repo_find_unique_abbrev_r(the_repository, hex, oid, len)
af49c6d0 1051
cd02599c 1052extern const unsigned char null_sha1[GIT_MAX_RAWSZ];
3e56e724 1053extern const struct object_id null_oid;
1a812f3a
IM
1054
1055static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
0bef57ee 1056{
183a638b 1057 /*
0dab7129 1058 * Teach the compiler that there are only two possibilities of hash size
1059 * here, so that it can optimize for this case as much as possible.
183a638b 1060 */
0dab7129 1061 if (the_hash_algo->rawsz == GIT_MAX_RAWSZ)
1062 return memcmp(sha1, sha2, GIT_MAX_RAWSZ);
1063 return memcmp(sha1, sha2, GIT_SHA1_RAWSZ);
0bef57ee 1064}
1a812f3a 1065
aa1c6fdf 1066static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2)
1067{
1068 return hashcmp(oid1->hash, oid2->hash);
1069}
1070
14438c44
JK
1071static inline int hasheq(const unsigned char *sha1, const unsigned char *sha2)
1072{
0dab7129 1073 /*
1074 * We write this here instead of deferring to hashcmp so that the
1075 * compiler can properly inline it and avoid calling memcmp.
1076 */
1077 if (the_hash_algo->rawsz == GIT_MAX_RAWSZ)
1078 return !memcmp(sha1, sha2, GIT_MAX_RAWSZ);
1079 return !memcmp(sha1, sha2, GIT_SHA1_RAWSZ);
14438c44
JK
1080}
1081
1082static inline int oideq(const struct object_id *oid1, const struct object_id *oid2)
1083{
1084 return hasheq(oid1->hash, oid2->hash);
1085}
1086
1a812f3a 1087static inline int is_null_sha1(const unsigned char *sha1)
a89fccd2 1088{
e3ff0683 1089 return hasheq(sha1, null_sha1);
a89fccd2 1090}
1a812f3a 1091
aa1c6fdf 1092static inline int is_null_oid(const struct object_id *oid)
1093{
e3ff0683 1094 return hasheq(oid->hash, null_sha1);
aa1c6fdf 1095}
1096
e702496e
SP
1097static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
1098{
509f6f62 1099 memcpy(sha_dst, sha_src, the_hash_algo->rawsz);
e702496e 1100}
aa1c6fdf 1101
1102static inline void oidcpy(struct object_id *dst, const struct object_id *src)
1103{
974e4a85 1104 memcpy(dst->hash, src->hash, GIT_MAX_RAWSZ);
e702496e 1105}
aa1c6fdf 1106
1c41c82b
BW
1107static inline struct object_id *oiddup(const struct object_id *src)
1108{
1109 struct object_id *dst = xmalloc(sizeof(struct object_id));
1110 oidcpy(dst, src);
1111 return dst;
1112}
1113
a8e0d16d
JH
1114static inline void hashclr(unsigned char *hash)
1115{
509f6f62 1116 memset(hash, 0, the_hash_algo->rawsz);
a8e0d16d 1117}
e83c5163 1118
aa1c6fdf 1119static inline void oidclr(struct object_id *oid)
1120{
97a41a0c 1121 memset(oid->hash, 0, GIT_MAX_RAWSZ);
aa1c6fdf 1122}
1123
69d12425 1124static inline void oidread(struct object_id *oid, const unsigned char *hash)
1125{
1126 memcpy(oid->hash, hash, the_hash_algo->rawsz);
1127}
f8582cad
JK
1128
1129static inline int is_empty_blob_sha1(const unsigned char *sha1)
1130{
e3ff0683 1131 return hasheq(sha1, the_hash_algo->empty_blob->hash);
f8582cad
JK
1132}
1133
8576fde6
JK
1134static inline int is_empty_blob_oid(const struct object_id *oid)
1135{
4a7e27e9 1136 return oideq(oid, the_hash_algo->empty_blob);
8576fde6
JK
1137}
1138
1139static inline int is_empty_tree_sha1(const unsigned char *sha1)
1140{
e3ff0683 1141 return hasheq(sha1, the_hash_algo->empty_tree->hash);
8576fde6
JK
1142}
1143
1144static inline int is_empty_tree_oid(const struct object_id *oid)
1145{
4a7e27e9 1146 return oideq(oid, the_hash_algo->empty_tree);
8576fde6
JK
1147}
1148
d8a92ced 1149const char *empty_tree_oid_hex(void);
1150const char *empty_blob_oid_hex(void);
1151
b862b61c
MM
1152/* set default permissions by passing mode arguments to open(2) */
1153int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
1154int git_mkstemp_mode(char *pattern, int mode);
1155
06cbe855
HO
1156/*
1157 * NOTE NOTE NOTE!!
1158 *
1159 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
1160 * not be changed. Old repositories have core.sharedrepository written in
1161 * numeric format, and therefore these values are preserved for compatibility
1162 * reasons.
1163 */
94df2506 1164enum sharedrepo {
06cbe855
HO
1165 PERM_UMASK = 0,
1166 OLD_PERM_GROUP = 1,
1167 OLD_PERM_EVERYBODY = 2,
1168 PERM_GROUP = 0660,
4b05548f 1169 PERM_EVERYBODY = 0664
94df2506
JH
1170};
1171int git_config_perm(const char *var, const char *value);
3a429d3b 1172int adjust_shared_perm(const char *path);
0be0521b
MH
1173
1174/*
1175 * Create the directory containing the named path, using care to be
204a047f
MH
1176 * somewhat safe against races. Return one of the scld_error values to
1177 * indicate success/failure. On error, set errno to describe the
1178 * problem.
18d37e86
MH
1179 *
1180 * SCLD_VANISHED indicates that one of the ancestor directories of the
1181 * path existed at one point during the function call and then
1182 * suddenly vanished, probably because another process pruned the
1183 * directory while we were working. To be robust against this kind of
1184 * race, callers might want to try invoking the function again when it
1185 * returns SCLD_VANISHED.
e95792e5
MH
1186 *
1187 * safe_create_leading_directories() temporarily changes path while it
1188 * is working but restores it before returning.
1189 * safe_create_leading_directories_const() doesn't modify path, even
1190 * temporarily.
0be0521b
MH
1191 */
1192enum scld_error {
1193 SCLD_OK = 0,
1194 SCLD_FAILED = -1,
1195 SCLD_PERMS = -2,
18d37e86
MH
1196 SCLD_EXISTS = -3,
1197 SCLD_VANISHED = -4
0be0521b
MH
1198};
1199enum scld_error safe_create_leading_directories(char *path);
1200enum scld_error safe_create_leading_directories_const(const char *path);
1201
177978f5
MH
1202/*
1203 * Callback function for raceproof_create_file(). This function is
1204 * expected to do something that makes dirname(path) permanent despite
1205 * the fact that other processes might be cleaning up empty
1206 * directories at the same time. Usually it will create a file named
1207 * path, but alternatively it could create another file in that
1208 * directory, or even chdir() into that directory. The function should
1209 * return 0 if the action was completed successfully. On error, it
1210 * should return a nonzero result and set errno.
1211 * raceproof_create_file() treats two errno values specially:
1212 *
1213 * - ENOENT -- dirname(path) does not exist. In this case,
1214 * raceproof_create_file() tries creating dirname(path)
1215 * (and any parent directories, if necessary) and calls
1216 * the function again.
1217 *
1218 * - EISDIR -- the file already exists and is a directory. In this
1219 * case, raceproof_create_file() removes the directory if
1220 * it is empty (and recursively any empty directories that
1221 * it contains) and calls the function again.
1222 *
1223 * Any other errno causes raceproof_create_file() to fail with the
1224 * callback's return value and errno.
1225 *
1226 * Obviously, this function should be OK with being called again if it
1227 * fails with ENOENT or EISDIR. In other scenarios it will not be
1228 * called again.
1229 */
1230typedef int create_file_fn(const char *path, void *cb);
1231
1232/*
1233 * Create a file in dirname(path) by calling fn, creating leading
1234 * directories if necessary. Retry a few times in case we are racing
1235 * with another process that is trying to clean up the directory that
1236 * contains path. See the documentation for create_file_fn for more
1237 * details.
1238 *
1239 * Return the value and set the errno that resulted from the most
1240 * recent call of fn. fn is always called at least once, and will be
1241 * called more than once if it returns ENOENT or EISDIR.
1242 */
1243int raceproof_create_file(const char *path, create_file_fn fn, void *cb);
1244
90a6464b 1245int mkdir_in_gitdir(const char *path);
55454427 1246char *expand_user_path(const char *path, int real_home);
1c64b48e 1247const char *enter_repo(const char *path, int strict);
e5392c51
JS
1248static inline int is_absolute_path(const char *path)
1249{
88135203 1250 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
e5392c51 1251}
90b4a71c 1252int is_directory(const char *);
a1ae4841
BW
1253char *strbuf_realpath(struct strbuf *resolved, const char *path,
1254 int die_on_error);
e2a57aac 1255const char *real_path(const char *path);
e3e46cdb 1256const char *real_path_if_valid(const char *path);
ce83eadd 1257char *real_pathdup(const char *path, int die_on_error);
e2a57aac 1258const char *absolute_path(const char *path);
b1edb40f 1259char *absolute_pathdup(const char *path);
41894ae3 1260const char *remove_leading_path(const char *in, const char *prefix);
e02ca72f 1261const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);
645a29c4 1262int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
f3cad0ad 1263int normalize_path_copy(char *dst, const char *src);
31171d9e 1264int longest_ancestor_length(const char *path, struct string_list *prefixes);
4fcc86b0 1265char *strip_path_suffix(const char *path, const char *suffix);
34b6cb8b 1266int daemon_avoid_alias(const char *path);
e7cb0b44
JS
1267
1268/*
1269 * These functions match their is_hfs_dotgit() counterparts; see utf8.h for
1270 * details.
1271 */
1272int is_ntfs_dotgit(const char *name);
1273int is_ntfs_dotgitmodules(const char *name);
1274int is_ntfs_dotgitignore(const char *name);
1275int is_ntfs_dotgitattributes(const char *name);
b2cb9425 1276
2491f77b
JK
1277/*
1278 * Returns true iff "str" could be confused as a command-line option when
1279 * passed to a sub-program like "ssh". Note that this has nothing to do with
1280 * shell-quoting, which should be handled separately; we're assuming here that
1281 * the string makes it verbatim to the sub-program.
1282 */
1283int looks_like_command_line_option(const char *str);
1284
ea19289b
PT
1285/**
1286 * Return a newly allocated string with the evaluation of
1287 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise
1288 * "$HOME/.config/git/$filename". Return NULL upon error.
1289 */
55454427 1290char *xdg_config_home(const char *filename);
ea19289b 1291
e7f136bf
DL
1292/**
1293 * Return a newly allocated string with the evaluation of
1294 * "$XDG_CACHE_HOME/git/$filename" if $XDG_CACHE_HOME is non-empty, otherwise
1295 * "$HOME/.cache/git/$filename". Return NULL upon error.
1296 */
55454427 1297char *xdg_cache_home(const char *filename);
e7f136bf 1298
55454427 1299int git_open_cloexec(const char *name, int flags);
b4d065df 1300#define git_open(name) git_open_cloexec(name, O_RDONLY)
55454427
DL
1301int unpack_loose_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
1302int parse_loose_header(const char *hdr, unsigned long *sizep);
8237b185 1303
55454427 1304int check_object_signature(const struct object_id *oid, void *buf, unsigned long size, const char *type);
e83c5163 1305
55454427 1306int finalize_object_file(const char *tmpfile, const char *filename);
8237b185 1307
6a5e6f5e 1308/* Helper to check and "touch" a file */
55454427 1309int check_and_freshen_file(const char *fn, int freshen);
6a5e6f5e 1310
192a6be2
LT
1311extern const signed char hexval_table[256];
1312static inline unsigned int hexval(unsigned char c)
e49521b5
JH
1313{
1314 return hexval_table[c];
1315}
1316
d2330973
RS
1317/*
1318 * Convert two consecutive hexadecimal digits into a char. Return a
1319 * negative value on error. Don't run over the end of short strings.
1320 */
1321static inline int hex2chr(const char *s)
1322{
356a293f
RJ
1323 unsigned int val = hexval(s[0]);
1324 return (val & ~0xf) ? val : (val << 4) | hexval(s[1]);
d2330973
RS
1325}
1326
e83c5163 1327/* Convert to/from hex/sha1 representation */
dce96489
LT
1328#define MINIMUM_ABBREV minimum_abbrev
1329#define DEFAULT_ABBREV default_abbrev
46a6c262 1330
65acfeac
JH
1331/* used when the code does not know or care what the default abbrev is */
1332#define FALLBACK_DEFAULT_ABBREV 7
1333
573285e5 1334struct object_context {
5ec1e728 1335 unsigned short mode;
c4ec9677
DT
1336 /*
1337 * symlink_path is only used by get_tree_entry_follow_symlinks,
1338 * and only for symlinks that point outside the repository.
1339 */
1340 struct strbuf symlink_path;
dc944b65 1341 /*
321c89bf 1342 * If GET_OID_RECORD_PATH is set, this will record path (if any)
dc944b65
JK
1343 * found when resolving the name. The caller is responsible for
1344 * releasing the memory.
1345 */
1346 char *path;
573285e5
CP
1347};
1348
321c89bf 1349#define GET_OID_QUIETLY 01
1350#define GET_OID_COMMIT 02
1351#define GET_OID_COMMITTISH 04
1352#define GET_OID_TREE 010
1353#define GET_OID_TREEISH 020
1354#define GET_OID_BLOB 040
1355#define GET_OID_FOLLOW_SYMLINKS 0100
1356#define GET_OID_RECORD_PATH 0200
1357#define GET_OID_ONLY_TO_DIE 04000
1358
1359#define GET_OID_DISAMBIGUATORS \
1360 (GET_OID_COMMIT | GET_OID_COMMITTISH | \
1361 GET_OID_TREE | GET_OID_TREEISH | \
1362 GET_OID_BLOB)
d4e85a1a 1363
d1dd94b3
DT
1364enum get_oid_result {
1365 FOUND = 0,
1366 MISSING_OBJECT = -1, /* The requested object is missing */
1367 SHORT_NAME_AMBIGUOUS = -2,
1368 /* The following only apply when symlinks are followed */
1369 DANGLING_SYMLINK = -4, /*
1370 * The initial symlink is there, but
1371 * (transitively) points to a missing
1372 * in-tree file
1373 */
1374 SYMLINK_LOOP = -5,
1375 NOT_DIR = -6, /*
1376 * Somewhere along the symlink chain, a path is
1377 * requested which contains a file as a
1378 * non-final element.
1379 */
1380};
1381
ec580eaa 1382int repo_get_oid(struct repository *r, const char *str, struct object_id *oid);
0b179f31 1383int get_oidf(struct object_id *oid, const char *fmt, ...);
65e50464
NTND
1384int repo_get_oid_commit(struct repository *r, const char *str, struct object_id *oid);
1385int repo_get_oid_committish(struct repository *r, const char *str, struct object_id *oid);
1386int repo_get_oid_tree(struct repository *r, const char *str, struct object_id *oid);
1387int repo_get_oid_treeish(struct repository *r, const char *str, struct object_id *oid);
1388int repo_get_oid_blob(struct repository *r, const char *str, struct object_id *oid);
0daf7ff6 1389int repo_get_oid_mb(struct repository *r, const char *str, struct object_id *oid);
e270f42c
NTND
1390void maybe_die_on_misspelt_object_name(struct repository *repo,
1391 const char *name,
1392 const char *prefix);
55454427 1393enum get_oid_result get_oid_with_context(struct repository *repo, const char *str,
ad6dad09
DL
1394 unsigned flags, struct object_id *oid,
1395 struct object_context *oc);
2764fd93 1396
65e50464
NTND
1397#define get_oid(str, oid) repo_get_oid(the_repository, str, oid)
1398#define get_oid_commit(str, oid) repo_get_oid_commit(the_repository, str, oid)
1399#define get_oid_committish(str, oid) repo_get_oid_committish(the_repository, str, oid)
1400#define get_oid_tree(str, oid) repo_get_oid_tree(the_repository, str, oid)
1401#define get_oid_treeish(str, oid) repo_get_oid_treeish(the_repository, str, oid)
1402#define get_oid_blob(str, oid) repo_get_oid_blob(the_repository, str, oid)
0daf7ff6 1403#define get_oid_mb(str, oid) repo_get_oid_mb(the_repository, str, oid)
65e50464 1404
1b7ba794 1405typedef int each_abbrev_fn(const struct object_id *oid, void *);
4e99f2db
NTND
1406int repo_for_each_abbrev(struct repository *r, const char *prefix, each_abbrev_fn, void *);
1407#define for_each_abbrev(prefix, fn, data) repo_for_each_abbrev(the_repository, prefix, fn, data)
d4e85a1a 1408
55454427 1409int set_disambiguate_hint_config(const char *var, const char *value);
5b33cb1f 1410
d4e85a1a
MH
1411/*
1412 * Try to read a SHA1 in hexadecimal format from the 40 characters
1413 * starting at hex. Write the 20-byte result to sha1 in binary form.
1414 * Return 0 on success. Reading stops if a NUL is encountered in the
1415 * input, so it is safe to pass this function an arbitrary
1416 * null-terminated string.
1417 */
55454427
DL
1418int get_sha1_hex(const char *hex, unsigned char *sha1);
1419int get_oid_hex(const char *hex, struct object_id *sha1);
d4e85a1a 1420
0ec21865
RS
1421/*
1422 * Read `len` pairs of hexadecimal digits from `hex` and write the
1423 * values to `binary` as `len` bytes. Return 0 on success, or -1 if
1424 * the input does not consist of hex digits).
1425 */
55454427 1426int hex_to_bytes(unsigned char *binary, const char *hex, size_t len);
0ec21865 1427
af49c6d0 1428/*
47edb649 1429 * Convert a binary hash to its hex equivalent. The `_r` variant is reentrant,
af49c6d0 1430 * and writes the NUL-terminated output to the buffer `out`, which must be at
47edb649 1431 * least `GIT_MAX_HEXSZ + 1` bytes, and returns a pointer to out for
af49c6d0
JK
1432 * convenience.
1433 *
1434 * The non-`_r` variant returns a static buffer, but uses a ring of 4
1435 * buffers, making it safe to make multiple calls for a single statement, like:
1436 *
1437 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));
1438 */
47edb649 1439char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash, const struct git_hash_algo *);
1440char *sha1_to_hex_r(char *out, const unsigned char *sha1);
1441char *oid_to_hex_r(char *out, const struct object_id *oid);
1442char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *); /* static buffer result! */
1443char *sha1_to_hex(const unsigned char *sha1); /* same static buffer */
1444char *hash_to_hex(const unsigned char *hash); /* same static buffer */
1445char *oid_to_hex(const struct object_id *oid); /* same static buffer */
7cb36842 1446
605f430e 1447/*
1448 * Parse a 40-character hexadecimal object ID starting from hex, updating the
1449 * pointer specified by end when parsing stops. The resulting object ID is
1450 * stored in oid. Returns 0 on success. Parsing will stop on the first NUL or
1451 * other invalid character. end is only updated on success; otherwise, it is
1452 * unmodified.
1453 */
55454427 1454int parse_oid_hex(const char *hex, struct object_id *oid, const char **end);
605f430e 1455
e322b60d
JK
1456/*
1457 * This reads short-hand syntax that not only evaluates to a commit
1458 * object name, but also can act as if the end user spelled the name
1459 * of the branch from the command line.
1460 *
1461 * - "@{-N}" finds the name of the Nth previous branch we were on, and
1462 * places the name of the branch in the given buf and returns the
1463 * number of characters parsed if successful.
1464 *
1465 * - "<branch>@{upstream}" finds the name of the other ref that
1466 * <branch> is configured to merge with (missing <branch> defaults
1467 * to the current branch), and places the name of the branch in the
1468 * given buf and returns the number of characters parsed if
1469 * successful.
1470 *
1471 * If the input is not of the accepted format, it returns a negative
1472 * number to signal an error.
1473 *
1474 * If the input was ok but there are not N branch switches in the
1475 * reflog, it returns 0.
0e9f62da
JK
1476 *
1477 * If "allowed" is non-zero, it is a treated as a bitfield of allowable
1478 * expansions: local branches ("refs/heads/"), remote branches
1479 * ("refs/remotes/"), or "HEAD". If no "allowed" bits are set, any expansion is
1480 * allowed, even ones to refs outside of those namespaces.
e322b60d 1481 */
0e9f62da
JK
1482#define INTERPRET_BRANCH_LOCAL (1<<0)
1483#define INTERPRET_BRANCH_REMOTE (1<<1)
1484#define INTERPRET_BRANCH_HEAD (1<<2)
8f56e9d4
NTND
1485int repo_interpret_branch_name(struct repository *r,
1486 const char *str, int len,
1487 struct strbuf *buf,
1488 unsigned allowed);
1489#define interpret_branch_name(str, len, buf, allowed) \
1490 repo_interpret_branch_name(the_repository, str, len, buf, allowed)
e86eb666 1491
55454427 1492int validate_headref(const char *ref);
e83c5163 1493
55454427
DL
1494int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
1495int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
1496int name_compare(const char *name1, size_t len1, const char *name2, size_t len2);
1497int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
e83c5163 1498
d3b4705a
NTND
1499void *read_object_with_reference(struct repository *r,
1500 const struct object_id *oid,
ad6dad09
DL
1501 const char *required_type,
1502 unsigned long *size,
1503 struct object_id *oid_ret);
f4913f91 1504
2b1790f5
NTND
1505struct object *repo_peel_to_type(struct repository *r,
1506 const char *name, int namelen,
1507 struct object *o, enum object_type);
1508#define peel_to_type(name, namelen, obj, type) \
1509 repo_peel_to_type(the_repository, name, namelen, obj, type)
81776315 1510
58930fdb
JS
1511enum date_mode_type {
1512 DATE_NORMAL = 0,
ecbe1beb 1513 DATE_HUMAN,
58930fdb
JS
1514 DATE_RELATIVE,
1515 DATE_SHORT,
1516 DATE_ISO8601,
1517 DATE_ISO8601_STRICT,
1518 DATE_RFC2822,
1519 DATE_STRFTIME,
1520 DATE_RAW,
1521 DATE_UNIX
1522};
1523
a5481a6c 1524struct date_mode {
58930fdb 1525 enum date_mode_type type;
aa1462cc 1526 const char *strftime_fmt;
add00ba2 1527 int local;
73013afd
JH
1528};
1529
a5481a6c
JK
1530/*
1531 * Convenience helper for passing a constant type, like:
1532 *
1533 * show_date(t, tz, DATE_MODE(NORMAL));
1534 */
1535#define DATE_MODE(t) date_mode_from_type(DATE_##t)
1536struct date_mode *date_mode_from_type(enum date_mode_type type);
1537
dddbad72 1538const char *show_date(timestamp_t time, int timezone, const struct date_mode *mode);
3d42034a 1539void show_date_relative(timestamp_t time, const struct timeval *now,
7d29afd4 1540 struct strbuf *timebuf);
b841d4ff
SS
1541void show_date_human(timestamp_t time, int tz, const struct timeval *now,
1542 struct strbuf *timebuf);
c33ddc2e 1543int parse_date(const char *date, struct strbuf *out);
dddbad72
JS
1544int parse_date_basic(const char *date, timestamp_t *timestamp, int *offset);
1545int parse_expiry_date(const char *date, timestamp_t *timestamp);
c33ddc2e 1546void datestamp(struct strbuf *out);
93cfa7c7 1547#define approxidate(s) approxidate_careful((s), NULL)
dddbad72
JS
1548timestamp_t approxidate_careful(const char *, int *);
1549timestamp_t approxidate_relative(const char *date, const struct timeval *now);
a5481a6c 1550void parse_date_format(const char *format, struct date_mode *mode);
dddbad72 1551int date_overflows(timestamp_t date);
ecee9d9e 1552
f9bc573f 1553#define IDENT_STRICT 1
b9f0ac17 1554#define IDENT_NO_DATE 2
c15e1987 1555#define IDENT_NO_NAME 4
39ab4d09
WH
1556
1557enum want_ident {
1558 WANT_BLANK_IDENT,
1559 WANT_AUTHOR_IDENT,
1560 WANT_COMMITTER_IDENT
1561};
1562
55454427
DL
1563const char *git_author_info(int);
1564const char *git_committer_info(int);
1565const char *fmt_ident(const char *name, const char *email,
ad6dad09
DL
1566 enum want_ident whose_ident,
1567 const char *date_str, int);
55454427
DL
1568const char *fmt_name(enum want_ident);
1569const char *ident_default_name(void);
1570const char *ident_default_email(void);
1571const char *git_editor(void);
1572const char *git_sequence_editor(void);
1573const char *git_pager(int stdout_is_tty);
1574int is_terminal_dumb(void);
1575int git_ident_config(const char *, const char *, void *);
fd5a5847
JS
1576/*
1577 * Prepare an ident to fall back on if the user didn't configure it.
fd5a5847
JS
1578 */
1579void prepare_fallback_ident(const char *name, const char *email);
55454427 1580void reset_ident_date(void);
6aa33f40 1581
4b340cfa
JH
1582struct ident_split {
1583 const char *name_begin;
1584 const char *name_end;
1585 const char *mail_begin;
1586 const char *mail_end;
1587 const char *date_begin;
1588 const char *date_end;
1589 const char *tz_begin;
1590 const char *tz_end;
1591};
1592/*
1593 * Signals an success with 0, but time part of the result may be NULL
1594 * if the input lacks timestamp and zone
1595 */
55454427 1596int split_ident_line(struct ident_split *, const char *, int);
4b340cfa 1597
d1053246
JK
1598/*
1599 * Like show_date, but pull the timestamp and tz parameters from
1600 * the ident_split. It will also sanity-check the values and produce
1601 * a well-known sentinel date if they appear bogus.
1602 */
a5481a6c
JK
1603const char *show_ident_date(const struct ident_split *id,
1604 const struct date_mode *mode);
d1053246 1605
662cc30c
JK
1606/*
1607 * Compare split idents for equality or strict ordering. Note that we
1608 * compare only the ident part of the line, ignoring any timestamp.
1609 *
1610 * Because there are two fields, we must choose one as the primary key; we
1611 * currently arbitrarily pick the email.
1612 */
55454427 1613int ident_cmp(const struct ident_split *, const struct ident_split *);
662cc30c 1614
12dccc16 1615struct checkout {
d4a2024a 1616 struct index_state *istate;
12dccc16
LT
1617 const char *base_dir;
1618 int base_dir_len;
2841e8f8 1619 struct delayed_checkout *delayed_checkout;
12dccc16
LT
1620 unsigned force:1,
1621 quiet:1,
1622 not_new:1,
b878579a 1623 clone:1,
12dccc16
LT
1624 refresh_cache:1;
1625};
68e3d629 1626#define CHECKOUT_INIT { NULL, "" }
12dccc16 1627
af2a651d 1628#define TEMPORARY_FILENAME_LENGTH 25
55454427
DL
1629int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath, int *nr_checkouts);
1630void enable_delayed_checkout(struct checkout *state);
1631int finish_delayed_checkout(struct checkout *state, int *nr_checkouts);
b702dd12
TG
1632/*
1633 * Unlink the last component and schedule the leading directories for
1634 * removal, such that empty directories get removed.
1635 */
55454427 1636void unlink_entry(const struct cache_entry *ce);
b9fd2846
LT
1637
1638struct cache_def {
e7c73053 1639 struct strbuf path;
b9fd2846
LT
1640 int flags;
1641 int track_flags;
1642 int prefix_len_stat_func;
1643};
e7c73053 1644#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }
2a608391 1645static inline void cache_def_clear(struct cache_def *cache)
e7c73053
KB
1646{
1647 strbuf_release(&cache->path);
1648}
b9fd2846 1649
55454427
DL
1650int has_symlink_leading_path(const char *name, int len);
1651int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
1652int check_leading_path(const char *name, int len);
1653int has_dirs_only_path(const char *name, int len, int prefix_len);
1654void schedule_dir_for_removal(const char *name, int len);
1655void remove_scheduled_dirs(void);
12dccc16 1656
c41ee586
SP
1657struct pack_window {
1658 struct pack_window *next;
1659 unsigned char *base;
1660 off_t offset;
1661 size_t len;
1662 unsigned int last_used;
1663 unsigned int inuse_cnt;
1664};
1665
f3bf9224 1666struct pack_entry {
c4001d92 1667 off_t offset;
f3bf9224
JH
1668 struct packed_git *p;
1669};
1670
82c9d661 1671/*
892e723a
JK
1672 * Create a temporary file rooted in the object database directory, or
1673 * die on failure. The filename is taken from "pattern", which should have the
1674 * usual "XXXXXX" trailer, and the resulting filename is written into the
1675 * "template" buffer. Returns the open descriptor.
82c9d661 1676 */
55454427 1677int odb_mkstemp(struct strbuf *temp_filename, const char *pattern);
82c9d661
JK
1678
1679/*
eaeefc32
JK
1680 * Create a pack .keep file named "name" (which should generally be the output
1681 * of odb_pack_name). Returns a file descriptor opened for writing, or -1 on
1682 * error.
82c9d661 1683 */
55454427 1684int odb_pack_keep(const char *name);
82c9d661 1685
8b4c0103 1686/*
c93206b4 1687 * Set this to 0 to prevent oid_object_info_extended() from fetching missing
8b4c0103
JT
1688 * blobs. This has a difference only if extensions.partialClone is set.
1689 *
1690 * Its default value is 1.
1691 */
1692extern int fetch_if_missing;
1693
8f3f9b09 1694/* Dumb servers support */
55454427 1695int update_server_info(int);
8f3f9b09 1696
55454427
DL
1697const char *get_log_output_encoding(void);
1698const char *get_commit_output_encoding(void);
a6fa5992 1699
dae6c322
CC
1700/*
1701 * This is a hack for test programs like test-dump-untracked-cache to
1702 * ensure that they do not modify the untracked cache when reading it.
1703 * Do not use it otherwise!
1704 */
1705extern int ignore_untracked_cache_config;
3c8687a7 1706
55454427
DL
1707int committer_ident_sufficiently_given(void);
1708int author_ident_sufficiently_given(void);
e1b10391 1709
1a8f2741 1710extern const char *git_commit_encoding;
3a55602e 1711extern const char *git_log_output_encoding;
d551a488 1712extern const char *git_mailmap_file;
08610900 1713extern const char *git_mailmap_blob;
4e72dcec 1714
06f59e9f 1715/* IO helper functions */
55454427 1716void maybe_flush_or_die(FILE *, const char *);
9540ce50 1717__attribute__((format (printf, 2, 3)))
b199d714 1718void fprintf_or_die(FILE *, const char *fmt, ...);
00b7cbfc
JH
1719
1720#define COPY_READ_ERROR (-2)
1721#define COPY_WRITE_ERROR (-3)
55454427
DL
1722int copy_fd(int ifd, int ofd);
1723int copy_file(const char *dst, const char *src, int mode);
1724int copy_file_with_time(const char *dst, const char *src, int mode);
00b7cbfc 1725
55454427
DL
1726void write_or_die(int fd, const void *buf, size_t count);
1727void fsync_or_die(int fd, const char *);
ad897215 1728
55454427
DL
1729ssize_t read_in_full(int fd, void *buf, size_t count);
1730ssize_t write_in_full(int fd, const void *buf, size_t count);
1731ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset);
426ddeea 1732
2b7ca830
JM
1733static inline ssize_t write_str_in_full(int fd, const char *str)
1734{
1735 return write_in_full(fd, str, strlen(str));
1736}
12d6ce1d 1737
52563d7e
JK
1738/**
1739 * Open (and truncate) the file at path, write the contents of buf to it,
1740 * and close it. Dies if any errors are encountered.
1741 */
55454427 1742void write_file_buf(const char *path, const char *buf, size_t len);
52563d7e 1743
e04d08a4
JK
1744/**
1745 * Like write_file_buf(), but format the contents into a buffer first.
1746 * Additionally, write_file() will append a newline if one is not already
1747 * present, making it convenient to write text files:
1748 *
1749 * write_file(path, "counter: %d", ctr);
1750 */
1751__attribute__((format (printf, 2, 3)))
b199d714 1752void write_file(const char *path, const char *fmt, ...);
2b7ca830 1753
f67b45f8 1754/* pager.c */
55454427
DL
1755void setup_pager(void);
1756int pager_in_use(void);
aa086eb8 1757extern int pager_use_color;
55454427 1758int term_columns(void);
cd1096b2 1759void term_clear_line(void);
55454427
DL
1760int decimal_width(uintmax_t);
1761int check_pager_config(const char *cmd);
1762void prepare_pager_args(struct child_process *, const char *pager);
f67b45f8 1763
ee9601e6 1764extern const char *editor_program;
d3e7da89 1765extern const char *askpass_program;
dfb068be 1766extern const char *excludes_file;
4d87b9c5 1767
051308f6 1768/* base85 */
f9815772
JM
1769int decode_85(char *dst, const char *line, int linelen);
1770void encode_85(char *buf, const unsigned char *data, int bytes);
051308f6 1771
5991a55c 1772/* pkt-line.c */
bbc30f99 1773void packet_trace_identity(const char *prog);
6ce4e61f 1774
b6ec1d61 1775/* add */
7ae02a30
AR
1776/*
1777 * return 0 if success, 1 - if addition of a file failed and
1778 * ADD_FILES_IGNORE_ERRORS was specified in flags
1779 */
610d55af 1780int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags);
b6ec1d61 1781
aecbf914
JH
1782/* diff.c */
1783extern int diff_auto_refresh_index;
1784
68faf689 1785/* match-trees.c */
90d34051
NTND
1786void shift_tree(struct repository *, const struct object_id *, const struct object_id *, struct object_id *, int);
1787void shift_tree_by(struct repository *, const struct object_id *, const struct object_id *, struct object_id *, const char *);
68faf689 1788
a9cc857a
JH
1789/*
1790 * whitespace rules.
1791 * used by both diff and apply
f4b05a49 1792 * last two digits are tab width
a9cc857a 1793 */
f4b05a49
JS
1794#define WS_BLANK_AT_EOL 0100
1795#define WS_SPACE_BEFORE_TAB 0200
1796#define WS_INDENT_WITH_NON_TAB 0400
1797#define WS_CR_AT_EOL 01000
1798#define WS_BLANK_AT_EOF 02000
1799#define WS_TAB_IN_INDENT 04000
aeb84b05 1800#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
f4b05a49
JS
1801#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1802#define WS_TAB_WIDTH_MASK 077
091f8e28
SB
1803/* All WS_* -- when extended, adapt diff.c emit_symbol */
1804#define WS_RULE_MASK 07777
cf1b7869 1805extern unsigned whitespace_rule_cfg;
55454427
DL
1806unsigned whitespace_rule(struct index_state *, const char *);
1807unsigned parse_whitespace_rule(const char *);
1808unsigned ws_check(const char *line, int len, unsigned ws_rule);
1809void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1810char *whitespace_error_string(unsigned ws);
1811void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1812int ws_blank_line(const char *line, int len, unsigned ws_rule);
f4b05a49 1813#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
a9cc857a 1814
ee425e46 1815/* ls-files */
312c984a
BW
1816void overlay_tree_on_index(struct index_state *istate,
1817 const char *tree_name, const char *prefix);
ee425e46 1818
46c3cd44 1819/* setup.c */
e37c1329 1820struct startup_info {
a60645f9 1821 int have_repository;
f07d6a1a 1822 const char *prefix;
e37c1329
NTND
1823};
1824extern struct startup_info *startup_info;
1825
db699a8a
NTND
1826/* merge.c */
1827struct commit_list;
7e196c3a
NTND
1828int try_merge_command(struct repository *r,
1829 const char *strategy, size_t xopts_nr,
db699a8a
NTND
1830 const char **xopts, struct commit_list *common,
1831 const char *head_arg, struct commit_list *remotes);
7e196c3a
NTND
1832int checkout_fast_forward(struct repository *r,
1833 const struct object_id *from,
f06e90da 1834 const struct object_id *to,
db699a8a
NTND
1835 int overwrite_ignore);
1836
cac42b26 1837
38f865c2
JK
1838int sane_execvp(const char *file, char *const argv[]);
1839
38612532
MH
1840/*
1841 * A struct to encapsulate the concept of whether a file has changed
1842 * since we last checked it. This uses criteria similar to those used
1843 * for the index.
1844 */
1845struct stat_validity {
1846 struct stat_data *sd;
1847};
1848
1849void stat_validity_clear(struct stat_validity *sv);
1850
1851/*
1852 * Returns 1 if the path is a regular file (or a symlink to a regular
1853 * file) and matches the saved stat_validity, 0 otherwise. A missing
1854 * or inaccessible file is considered a match if the struct was just
1855 * initialized, or if the previous update found an inaccessible file.
1856 */
1857int stat_validity_check(struct stat_validity *sv, const char *path);
1858
1859/*
1860 * Update the stat_validity from a file opened at descriptor fd. If
1861 * the file is missing, inaccessible, or not a regular file, then
1862 * future calls to stat_validity_check will match iff one of those
1863 * conditions continues to be true.
1864 */
1865void stat_validity_update(struct stat_validity *sv, int fd);
1866
9ef176b5 1867int versioncmp(const char *s1, const char *s2);
2024d317 1868void sleep_millisec(int millisec);
9ef176b5 1869
eb33876c
DT
1870/*
1871 * Create a directory and (if share is nonzero) adjust its permissions
1872 * according to the shared_repository setting. Only use this for
1873 * directories under $GIT_DIR. Don't use it for working tree
1874 * directories.
1875 */
1876void safe_create_dir(const char *dir, int share);
1877
a2cd709d
AR
1878/*
1879 * Should we print an ellipsis after an abbreviated SHA-1 value
1880 * when doing diff-raw output or indicating a detached HEAD?
1881 */
55454427 1882int print_sha1_ellipsis(void);
a2cd709d 1883
e3b1e3bd 1884/* Return 1 if the file is empty or does not exists, 0 otherwise. */
55454427 1885int is_empty_or_missing_file(const char *filename);
e3b1e3bd 1886
e83c5163 1887#endif /* CACHE_H */