cache.h: document remove_index_entry_at
[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"
5991a55c 10#include "trace.h"
155ef25f 11#include "string-list.h"
f4015337 12#include "pack-revindex.h"
e83c5163 13
cef661fc 14#include SHA1_HEADER
3bc72fde
APD
15#ifndef platform_SHA_CTX
16/*
17 * platform's underlying implementation of SHA-1; could be OpenSSL,
18 * blk_SHA, Apple CommonCrypto, etc... Note that including
19 * SHA1_HEADER may have already defined platform_SHA_CTX for our
20 * own implementations like block-sha1 and ppc-sha1, so we list
21 * the default for OpenSSL compatible SHA-1 implementations here.
22 */
23#define platform_SHA_CTX SHA_CTX
24#define platform_SHA1_Init SHA1_Init
25#define platform_SHA1_Update SHA1_Update
26#define platform_SHA1_Final SHA1_Final
9126f009 27#endif
e83c5163 28
3bc72fde
APD
29#define git_SHA_CTX platform_SHA_CTX
30#define git_SHA1_Init platform_SHA1_Init
31#define git_SHA1_Update platform_SHA1_Update
32#define git_SHA1_Final platform_SHA1_Final
33
001fd7a9
APD
34#ifdef SHA1_MAX_BLOCK_SIZE
35#include "compat/sha1-chunked.h"
36#undef git_SHA1_Update
37#define git_SHA1_Update git_SHA1_Update_Chunked
9126f009 38#endif
e83c5163 39
9126f009 40#include <zlib.h>
ef49a7a0
JH
41typedef struct git_zstream {
42 z_stream z;
43 unsigned long avail_in;
44 unsigned long avail_out;
45 unsigned long total_in;
46 unsigned long total_out;
47 unsigned char *next_in;
48 unsigned char *next_out;
49} git_zstream;
50
51void git_inflate_init(git_zstream *);
52void git_inflate_init_gzip_only(git_zstream *);
53void git_inflate_end(git_zstream *);
54int git_inflate(git_zstream *, int flush);
55
56void git_deflate_init(git_zstream *, int level);
57void git_deflate_init_gzip(git_zstream *, int level);
c3c2e1a0 58void git_deflate_init_raw(git_zstream *, int level);
ef49a7a0 59void git_deflate_end(git_zstream *);
568508e7 60int git_deflate_abort(git_zstream *);
ef49a7a0
JH
61int git_deflate_end_gently(git_zstream *);
62int git_deflate(git_zstream *, int flush);
63unsigned long git_deflate_bound(git_zstream *, unsigned long);
39c68542 64
5f7817c8 65/* The length in bytes and in hex digits of an object name (SHA-1 value). */
66#define GIT_SHA1_RAWSZ 20
67#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ)
68
69struct object_id {
70 unsigned char hash[GIT_SHA1_RAWSZ];
71};
72
962554c6 73#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
b6829693
ET
74#define DTYPE(de) ((de)->d_type)
75#else
0bdd79af
JH
76#undef DT_UNKNOWN
77#undef DT_DIR
78#undef DT_REG
79#undef DT_LNK
b6829693
ET
80#define DT_UNKNOWN 0
81#define DT_DIR 1
82#define DT_REG 2
a15c1c60 83#define DT_LNK 3
b6829693
ET
84#define DTYPE(de) DT_UNKNOWN
85#endif
86
40689ae1
MK
87/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
88#define S_IFINVALID 0030000
89
9eec4795
LT
90/*
91 * A "directory link" is a link to another git directory.
92 *
93 * The value 0160000 is not normally a valid mode, and
94 * also just happens to be S_IFDIR + S_IFLNK
9eec4795 95 */
302b9282
MW
96#define S_IFGITLINK 0160000
97#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
9eec4795 98
72441af7
KS
99/*
100 * Some mode bits are also used internally for computations.
101 *
102 * They *must* not overlap with any valid modes, and they *must* not be emitted
103 * to outside world - i.e. appear on disk or network. In other words, it's just
104 * temporary fields, which we internally use, but they have to stay in-house.
105 *
106 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git
107 * codebase mode is `unsigned int` which is assumed to be at least 32 bits )
108 */
109
110/* used internally in tree-diff */
111#define S_DIFFTREE_IFXMIN_NEQ 0x80000000
112
113
2386d658
LT
114/*
115 * Intensive research over the course of many years has shown that
116 * port 9418 is totally unused by anything else. Or
117 *
118 * Your search - "port 9418" - did not match any documents.
119 *
120 * as www.google.com puts it.
ba8a4970
LT
121 *
122 * This port has been properly assigned for git use by IANA:
123 * git (Assigned-9418) [I06-050728-0001].
124 *
125 * git 9418/tcp git pack transfer service
126 * git 9418/udp git pack transfer service
127 *
128 * with Linus Torvalds <torvalds@osdl.org> as the point of
129 * contact. September 2005.
130 *
131 * See http://www.iana.org/assignments/port-numbers
2386d658
LT
132 */
133#define DEFAULT_GIT_PORT 9418
134
e83c5163
LT
135/*
136 * Basic data structures for the directory cache
e83c5163
LT
137 */
138
139#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
140struct cache_header {
7800c1eb
TG
141 uint32_t hdr_signature;
142 uint32_t hdr_version;
143 uint32_t hdr_entries;
e83c5163
LT
144};
145
9d227781
JH
146#define INDEX_FORMAT_LB 2
147#define INDEX_FORMAT_UB 4
148
e83c5163
LT
149/*
150 * The "cache_time" is just the low 32 bits of the
151 * time. It doesn't matter if it overflows - we only
152 * check it for equality in the 32 bits we save.
153 */
154struct cache_time {
7800c1eb
TG
155 uint32_t sec;
156 uint32_t nsec;
e83c5163
LT
157};
158
c21d39d7
MH
159struct stat_data {
160 struct cache_time sd_ctime;
161 struct cache_time sd_mtime;
162 unsigned int sd_dev;
163 unsigned int sd_ino;
164 unsigned int sd_uid;
165 unsigned int sd_gid;
166 unsigned int sd_size;
167};
168
e83c5163 169struct cache_entry {
8b013788 170 struct hashmap_entry ent;
c21d39d7 171 struct stat_data ce_stat_data;
ccc4feb5 172 unsigned int ce_mode;
7a51ed66 173 unsigned int ce_flags;
b60e188c 174 unsigned int ce_namelen;
5fc2fc8f 175 unsigned int index; /* for link extension */
99d1a986 176 struct object_id oid;
8f1d2e6f 177 char name[FLEX_ARRAY]; /* more */
e83c5163
LT
178};
179
95fd5bf8 180#define CE_STAGEMASK (0x3000)
16ce2e4c 181#define CE_EXTENDED (0x4000)
5f73076c 182#define CE_VALID (0x8000)
aee46198 183#define CE_STAGESHIFT 12
95fd5bf8 184
06aaaa0b 185/*
ce51bf09 186 * Range 0xFFFF0FFF in ce_flags is divided into
06aaaa0b
NTND
187 * two parts: in-memory flags and on-disk ones.
188 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
189 * if you want to save a new flag, add it in
190 * CE_EXTENDED_FLAGS
191 *
192 * In-memory only flags
193 */
2977ffbb
NTND
194#define CE_UPDATE (1 << 16)
195#define CE_REMOVE (1 << 17)
196#define CE_UPTODATE (1 << 18)
197#define CE_ADDED (1 << 19)
a22c6371 198
2977ffbb 199#define CE_HASHED (1 << 20)
2977ffbb
NTND
200#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
201#define CE_CONFLICTED (1 << 23)
7a51ed66 202
2977ffbb 203#define CE_UNPACKED (1 << 24)
2431afbf 204#define CE_NEW_SKIP_WORKTREE (1 << 25)
da165f47 205
e721c154
NTND
206/* used to temporarily mark paths matched by pathspecs */
207#define CE_MATCHED (1 << 26)
208
078a58e8 209#define CE_UPDATE_IN_BASE (1 << 27)
b3c96fb1 210#define CE_STRIP_NAME (1 << 28)
078a58e8 211
06aaaa0b
NTND
212/*
213 * Extended on-disk flags
214 */
2977ffbb
NTND
215#define CE_INTENT_TO_ADD (1 << 29)
216#define CE_SKIP_WORKTREE (1 << 30)
06aaaa0b 217/* CE_EXTENDED2 is for future extension */
9a93c668 218#define CE_EXTENDED2 (1U << 31)
06aaaa0b 219
44a36913 220#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
06aaaa0b
NTND
221
222/*
223 * Safeguard to avoid saving wrong flags:
224 * - CE_EXTENDED2 won't get saved until its semantic is known
225 * - Bits in 0x0000FFFF have been saved in ce_flags already
226 * - Bits in 0x003F0000 are currently in-memory flags
227 */
228#if CE_EXTENDED_FLAGS & 0x803FFFFF
229#error "CE_EXTENDED_FLAGS out of range"
230#endif
231
3e3a4a41 232/* Forward structure decls */
64acde94 233struct pathspec;
3e3a4a41 234struct child_process;
64acde94 235
eb7a2f1d
LT
236/*
237 * Copy the sha1 and stat state of a cache entry from one to
238 * another. But we never change the name, or the hash state!
239 */
20d142b4
RS
240static inline void copy_cache_entry(struct cache_entry *dst,
241 const struct cache_entry *src)
eb7a2f1d 242{
419a597f 243 unsigned int state = dst->ce_flags & CE_HASHED;
eb7a2f1d
LT
244
245 /* Don't copy hash chain and name */
8b013788
KB
246 memcpy(&dst->ce_stat_data, &src->ce_stat_data,
247 offsetof(struct cache_entry, name) -
248 offsetof(struct cache_entry, ce_stat_data));
eb7a2f1d
LT
249
250 /* Restore the hash state */
419a597f 251 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state;
eb7a2f1d
LT
252}
253
b60e188c 254static inline unsigned create_ce_flags(unsigned stage)
7fec10b7 255{
b60e188c 256 return (stage << CE_STAGESHIFT);
7fec10b7
JH
257}
258
b60e188c 259#define ce_namelen(ce) ((ce)->ce_namelen)
aee46198 260#define ce_size(ce) cache_entry_size(ce_namelen(ce))
7a51ed66 261#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
eadb5831 262#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
44a36913 263#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
eadb5831 264#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
895ff3b2 265#define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD)
aee46198 266
e4479470 267#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
8ae0a8c5
KS
268static inline unsigned int create_ce_mode(unsigned int mode)
269{
8ae0a8c5 270 if (S_ISLNK(mode))
7a51ed66 271 return S_IFLNK;
302b9282 272 if (S_ISDIR(mode) || S_ISGITLINK(mode))
7a51ed66
LT
273 return S_IFGITLINK;
274 return S_IFREG | ce_permissions(mode);
8ae0a8c5 275}
20d142b4
RS
276static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce,
277 unsigned int mode)
185c975f 278{
78a8d641
JS
279 extern int trust_executable_bit, has_symlinks;
280 if (!has_symlinks && S_ISREG(mode) &&
7a51ed66 281 ce && S_ISLNK(ce->ce_mode))
78a8d641 282 return ce->ce_mode;
185c975f 283 if (!trust_executable_bit && S_ISREG(mode)) {
7a51ed66 284 if (ce && S_ISREG(ce->ce_mode))
185c975f
JH
285 return ce->ce_mode;
286 return create_ce_mode(0666);
287 }
288 return create_ce_mode(mode);
289}
d6b8fc30
JH
290static inline int ce_to_dtype(const struct cache_entry *ce)
291{
292 unsigned ce_mode = ntohl(ce->ce_mode);
293 if (S_ISREG(ce_mode))
294 return DT_REG;
295 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
296 return DT_DIR;
297 else if (S_ISLNK(ce_mode))
298 return DT_LNK;
299 else
300 return DT_UNKNOWN;
301}
b90d9b88
RS
302static inline unsigned int canon_mode(unsigned int mode)
303{
304 if (S_ISREG(mode))
305 return S_IFREG | ce_permissions(mode);
306 if (S_ISLNK(mode))
307 return S_IFLNK;
308 if (S_ISDIR(mode))
309 return S_IFDIR;
310 return S_IFGITLINK;
311}
e4479470 312
ee7825b5 313#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
f5cabd13 314
e636a7b4
NTND
315#define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */
316#define CE_ENTRY_CHANGED (1 << 1)
317#define CE_ENTRY_REMOVED (1 << 2)
318#define CE_ENTRY_ADDED (1 << 3)
6c306a34 319#define RESOLVE_UNDO_CHANGED (1 << 4)
a5400efe 320#define CACHE_TREE_CHANGED (1 << 5)
c18b80a0 321#define SPLIT_INDEX_ORDERED (1 << 6)
1bbb3dba 322#define UNTRACKED_CHANGED (1 << 7)
e636a7b4 323
5fc2fc8f 324struct split_index;
83c094ad
NTND
325struct untracked_cache;
326
228e94f9
JH
327struct index_state {
328 struct cache_entry **cache;
9d227781 329 unsigned int version;
228e94f9 330 unsigned int cache_nr, cache_alloc, cache_changed;
cfc5789a 331 struct string_list *resolve_undo;
228e94f9 332 struct cache_tree *cache_tree;
5fc2fc8f 333 struct split_index *split_index;
fba2f38a 334 struct cache_time timestamp;
913e0e99
JH
335 unsigned name_hash_initialized : 1,
336 initialized : 1;
8b013788 337 struct hashmap name_hash;
e05881a4 338 struct hashmap dir_hash;
426ddeea 339 unsigned char sha1[20];
83c094ad 340 struct untracked_cache *untracked;
228e94f9
JH
341};
342
343extern struct index_state the_index;
344
96872bc2
LT
345/* Name hashing */
346extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
2092678c
KB
347extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
348extern void free_name_hash(struct index_state *istate);
96872bc2
LT
349
350
4aab5b46 351#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
228e94f9
JH
352#define active_cache (the_index.cache)
353#define active_nr (the_index.cache_nr)
354#define active_alloc (the_index.cache_alloc)
355#define active_cache_changed (the_index.cache_changed)
356#define active_cache_tree (the_index.cache_tree)
e83c5163 357
4aab5b46
JH
358#define read_cache() read_index(&the_index)
359#define read_cache_from(path) read_index_from(&the_index, (path))
671c9b7e 360#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
fa7b3c2f 361#define is_cache_unborn() is_index_unborn(&the_index)
e46bbcf6 362#define read_cache_unmerged() read_index_unmerged(&the_index)
4aab5b46 363#define discard_cache() discard_index(&the_index)
94a5728c 364#define unmerged_cache() unmerged_index(&the_index)
4aab5b46
JH
365#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
366#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
81dc2307 367#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
4aab5b46
JH
368#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
369#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
610d55af
TG
370#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
371#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
d9d70966 372#define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip))
3deffc52 373#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
4bd5b7da
JH
374#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
375#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
db5360f3
ES
376#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen))
377#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase))
98fa4738 378#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
cfc5789a 379#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
8aa38563 380#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
4421a823 381#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
ff366825 382#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz))
4aab5b46 383#endif
e83c5163 384
edaec3fb
JH
385enum object_type {
386 OBJ_BAD = -1,
387 OBJ_NONE = 0,
388 OBJ_COMMIT = 1,
389 OBJ_TREE = 2,
390 OBJ_BLOB = 3,
391 OBJ_TAG = 4,
392 /* 5 for future expansion */
393 OBJ_OFS_DELTA = 6,
394 OBJ_REF_DELTA = 7,
355885d5 395 OBJ_ANY,
4b05548f 396 OBJ_MAX
edaec3fb
JH
397};
398
b45563a2
JH
399static inline enum object_type object_type(unsigned int mode)
400{
401 return S_ISDIR(mode) ? OBJ_TREE :
402 S_ISGITLINK(mode) ? OBJ_COMMIT :
403 OBJ_BLOB;
404}
405
2163e5db 406/* Double-check local_repo_env below if you add to this list. */
8ac069ac 407#define GIT_DIR_ENVIRONMENT "GIT_DIR"
c7b3a3d2 408#define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR"
a1bea2c1 409#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
892c41b9 410#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
a6f7f9a3 411#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
74866d75 412#define GIT_SUPER_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUPER_PREFIX"
8ac069ac 413#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
d19938ab 414#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
bb233d69 415#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
5da5c8f4 416#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
069c0532 417#define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE"
d4ebc36c
JH
418#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
419#define CONFIG_ENVIRONMENT "GIT_CONFIG"
2b64fc89 420#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
d4ebc36c 421#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
0454dd93 422#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
6476b38b 423#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
58d121b2 424#define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE"
d0bfd026
JH
425#define GITATTRIBUTES_FILE ".gitattributes"
426#define INFOATTRIBUTES_FILE "info/attributes"
f48fd688 427#define ATTRIBUTE_MACRO_PREFIX "[attr]"
a97a7468
JS
428#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
429#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
894a9d33 430#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
6956f858
TR
431#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
432#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
823ab40f 433#define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS"
bd30c2e4
NTND
434#define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS"
435#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS"
93d93537 436#define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS"
e34c2e01 437#define GIT_QUARANTINE_ENVIRONMENT "GIT_QUARANTINE_PATH"
bb233d69 438
48a7c1c4 439/*
2cd83d10
JK
440 * This environment variable is expected to contain a boolean indicating
441 * whether we should or should not treat:
442 *
443 * GIT_DIR=foo.git git ...
444 *
445 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use
446 * of this, but we use it internally to communicate to sub-processes that we
447 * are in a bare repo. If not set, defaults to true.
448 */
449#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
450
48a7c1c4 451/*
2163e5db
JK
452 * Repository-local GIT_* environment variables; these will be cleared
453 * when git spawns a sub-process that runs inside another repository.
454 * The array is NULL-terminated, which makes it easy to pass in the "env"
455 * parameter of a run-command invocation, or to do a simple walk.
48a7c1c4 456 */
2163e5db 457extern const char * const local_repo_env[];
48a7c1c4 458
b9605bc4
JK
459/*
460 * Returns true iff we have a configured git repository (either via
461 * setup_git_directory, or in the environment via $GIT_DIR).
462 */
463int have_git_dir(void);
464
7d1864ce
JH
465extern int is_bare_repository_cfg;
466extern int is_bare_repository(void);
68025633 467extern int is_inside_git_dir(void);
e90fdc39 468extern char *git_work_tree_cfg;
892c41b9 469extern int is_inside_work_tree(void);
c5fba16c 470extern const char *get_git_dir(void);
c7b3a3d2 471extern const char *get_git_common_dir(void);
8ac069ac
JH
472extern char *get_object_directory(void);
473extern char *get_index_file(void);
5da5c8f4 474extern char *get_graft_file(void);
d7ac12b2 475extern int set_git_dir(const char *path);
11f9dd71 476extern int get_common_dir_noenv(struct strbuf *sb, const char *gitdir);
31e26ebc 477extern int get_common_dir(struct strbuf *sb, const char *gitdir);
a1bea2c1
JT
478extern const char *get_git_namespace(void);
479extern const char *strip_namespace(const char *namespaced_ref);
74866d75 480extern const char *get_super_prefix(void);
e90fdc39 481extern const char *get_git_work_tree(void);
a93bedad 482
ffd036b1
JK
483/*
484 * Return true if the given path is a git directory; note that this _just_
485 * looks at the directory itself. If you want to know whether "foo/.git"
486 * is a repository, you must feed that path, not just "foo".
487 */
488extern int is_git_directory(const char *path);
489
490/*
491 * Return 1 if the given path is the root of a git repository or
492 * submodule, else 0. Will not return 1 for bare repositories with the
493 * exception of creating a bare repository in "foo/.git" and calling
494 * is_git_repository("foo").
495 *
496 * If we run into read errors, we err on the side of saying "yes, it is",
497 * as we usually consider sub-repos precious, and would prefer to err on the
498 * side of not disrupting or deleting them.
499 */
500extern int is_nonbare_repository_dir(struct strbuf *path);
501
a93bedad
EE
502#define READ_GITFILE_ERR_STAT_FAILED 1
503#define READ_GITFILE_ERR_NOT_A_FILE 2
504#define READ_GITFILE_ERR_OPEN_FAILED 3
505#define READ_GITFILE_ERR_READ_FAILED 4
506#define READ_GITFILE_ERR_INVALID_FORMAT 5
507#define READ_GITFILE_ERR_NO_PATH 6
508#define READ_GITFILE_ERR_NOT_A_REPO 7
921bdd96 509#define READ_GITFILE_ERR_TOO_LARGE 8
a93bedad
EE
510extern const char *read_gitfile_gently(const char *path, int *return_error_code);
511#define read_gitfile(path) read_gitfile_gently((path), NULL)
abc06822 512extern const char *resolve_gitdir(const char *suspect);
19757d80 513extern void set_git_work_tree(const char *tree);
8ac069ac
JH
514
515#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
bb233d69 516
6b5ee137 517extern const char **get_pathspec(const char *prefix, const char **pathspec);
59f0f2f3 518extern void setup_work_tree(void);
4ca06608 519extern const char *setup_git_directory_gently(int *);
d288a700 520extern const char *setup_git_directory(void);
edc54fb5 521extern char *prefix_path(const char *prefix, int len, const char *path);
645a29c4 522extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path);
4ca06608 523extern const char *prefix_filename(const char *prefix, int len, const char *path);
c6e8c800 524extern int check_filename(const char *prefix, const char *name);
023e37c3
MM
525extern void verify_filename(const char *prefix,
526 const char *name,
527 int diagnose_misspelt_rev);
ea92f41f 528extern void verify_non_filename(const char *prefix, const char *name);
546e0fd9 529extern int path_inside_repo(const char *prefix, const char *path);
d288a700 530
f225aeb2 531#define INIT_DB_QUIET 0x0001
33158701 532#define INIT_DB_EXIST_OK 0x0002
f225aeb2 533
33158701
NTND
534extern int init_db(const char *git_dir, const char *real_git_dir,
535 const char *template_dir, unsigned int flags);
f225aeb2 536
1d999ddd 537extern void sanitize_stdfds(void);
de0957ce 538extern int daemonize(void);
1d999ddd 539
e83c5163
LT
540#define alloc_nr(x) (((x)+16)*3/2)
541
6815e569
JK
542/*
543 * Realloc the buffer pointed at by variable 'x' so that it can hold
544 * at least 'nr' entries; the number of entries currently allocated
545 * is 'alloc', using the standard growing factor alloc_nr() macro.
546 *
01f6fd4b 547 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
6815e569
JK
548 */
549#define ALLOC_GROW(x, nr, alloc) \
550 do { \
c927e6c6 551 if ((nr) > alloc) { \
4234a761
JH
552 if (alloc_nr(alloc) < (nr)) \
553 alloc = (nr); \
554 else \
555 alloc = alloc_nr(alloc); \
2756ca43 556 REALLOC_ARRAY(x, alloc); \
6815e569 557 } \
98746061 558 } while (0)
6815e569 559
734aab75 560/* Initialize and use the cache information */
03b86647 561struct lock_file;
4aab5b46 562extern int read_index(struct index_state *);
5ab2a2da 563extern int read_index_preload(struct index_state *, const struct pathspec *pathspec);
3e52f70b
NTND
564extern int do_read_index(struct index_state *istate, const char *path,
565 int must_exist); /* for testting only! */
4aab5b46 566extern int read_index_from(struct index_state *, const char *path);
fa7b3c2f 567extern int is_index_unborn(struct index_state *);
e46bbcf6 568extern int read_index_unmerged(struct index_state *);
03b86647
NTND
569#define COMMIT_LOCK (1 << 0)
570#define CLOSE_LOCK (1 << 1)
571extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
4aab5b46 572extern int discard_index(struct index_state *);
d1f128b0 573extern int unmerged_index(const struct index_state *);
8dcf39c4 574extern int verify_path(const char *path);
41284eb0
DT
575extern int index_dir_exists(struct index_state *istate, const char *name, int namelen);
576extern void adjust_dirname_case(struct index_state *istate, char *name);
db5360f3 577extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
12733e9d
SB
578
579/*
580 * Searches for an entry defined by name and namelen in the given index.
581 * If the return value is positive (including 0) it is the position of an
582 * exact match. If the return value is negative, the negated value minus 1
583 * is the position where the entry would be inserted.
584 * Example: The current index consists of these files and its stages:
585 *
586 * b#0, d#0, f#1, f#3
587 *
588 * index_name_pos(&index, "a", 1) -> -1
589 * index_name_pos(&index, "b", 1) -> 0
590 * index_name_pos(&index, "c", 1) -> -2
591 * index_name_pos(&index, "d", 1) -> 1
592 * index_name_pos(&index, "e", 1) -> -3
593 * index_name_pos(&index, "f", 1) -> -3
594 * index_name_pos(&index, "g", 1) -> -5
595 */
d1f128b0 596extern int index_name_pos(const struct index_state *, const char *name, int namelen);
12733e9d 597
192268c1
JH
598#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
599#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
b155725d 600#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
af3785dc 601#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
39425819 602#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
ce7c614b 603#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */
4aab5b46 604extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
81dc2307 605extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
3bd72adf
SB
606
607/* Remove entry, return true if there are more entries to go. */
4aab5b46 608extern int remove_index_entry_at(struct index_state *, int pos);
3bd72adf 609
36419c8e 610extern void remove_marked_cache_entries(struct index_state *istate);
4aab5b46 611extern int remove_file_from_index(struct index_state *, const char *path);
38ed1d89
JH
612#define ADD_CACHE_VERBOSE 1
613#define ADD_CACHE_PRETEND 2
01665924 614#define ADD_CACHE_IGNORE_ERRORS 4
041aee31 615#define ADD_CACHE_IGNORE_REMOVAL 8
39425819 616#define ADD_CACHE_INTENT 16
610d55af
TG
617extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
618extern int add_file_to_index(struct index_state *, const char *path, int flags);
25762726 619extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options);
d9d70966 620extern int chmod_index_entry(struct index_state *, struct cache_entry *ce, char flip);
9c5e6c80 621extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b);
b4b313f9 622extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce);
98fa4738 623extern int index_name_is_other(const struct index_state *, const char *, int);
ff366825 624extern void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *);
4bd5b7da
JH
625
626/* do stat comparison even if CE_VALID is true */
627#define CE_MATCH_IGNORE_VALID 01
628/* do not check the contents but report dirty on racily-clean entries */
56cac48c
NTND
629#define CE_MATCH_RACY_IS_DIRTY 02
630/* do stat comparison even if CE_SKIP_WORKTREE is true */
631#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
2e2e7ec1
BK
632/* ignore non-existent files during stat update */
633#define CE_MATCH_IGNORE_MISSING 0x08
25762726
BK
634/* enable stat refresh */
635#define CE_MATCH_REFRESH 0x10
21a6b9fa
RS
636extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
637extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
4bd5b7da 638
c4ce46fc
JH
639#define HASH_WRITE_OBJECT 1
640#define HASH_FORMAT_CHECK 2
641extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
642extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
c21d39d7
MH
643
644/*
645 * Record to sd the data from st that we use to check whether a file
646 * might have changed.
647 */
648extern void fill_stat_data(struct stat_data *sd, struct stat *st);
649
650/*
651 * Return 0 if st is consistent with a file not having been changed
652 * since sd was filled. If there are differences, return a
653 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
654 * INODE_CHANGED, and DATA_CHANGED.
655 */
656extern int match_stat_data(const struct stat_data *sd, struct stat *st);
ed4efab1
NTND
657extern int match_stat_data_racy(const struct index_state *istate,
658 const struct stat_data *sd, struct stat *st);
c21d39d7 659
415e96c8
JH
660extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
661
405e5b2f
LT
662#define REFRESH_REALLY 0x0001 /* ignore_valid */
663#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
664#define REFRESH_QUIET 0x0004 /* be quiet about it */
665#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
3f1b7b60 666#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
43673fdd 667#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
9b2d6149 668extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
1335d76e 669extern struct cache_entry *refresh_cache_entry(struct cache_entry *, unsigned int);
405e5b2f 670
ccdc4ec3 671extern void update_index_if_able(struct index_state *, struct lock_file *);
30ca07a2
JH
672
673extern int hold_locked_index(struct lock_file *, int);
5e7f56ac 674extern void set_alternate_index_output(const char *);
697cc8ef 675
2ae1c53b 676/* Environment bits from configuration mechanism */
17712991 677extern int trust_executable_bit;
1ce4790b 678extern int trust_ctime;
c08e4d5b 679extern int check_stat;
9378c161 680extern int quote_path_fully;
78a8d641 681extern int has_symlinks;
dce96489 682extern int minimum_abbrev, default_abbrev;
0a9b88b7 683extern int ignore_case;
5f73076c 684extern int assume_unchanged;
9f0bb90d 685extern int prefer_symlink_refs;
6de08ae6 686extern int log_all_ref_updates;
2f8acdb3 687extern int warn_ambiguous_refs;
25fba78d 688extern int warn_on_object_refname_ambiguity;
2ae1c53b 689extern const char *apply_default_whitespace;
86c91f91 690extern const char *apply_default_ignorewhitespace;
64589a03 691extern const char *git_attributes_file;
867ad08a 692extern const char *git_hooks_path;
12f6c308 693extern int zlib_compression_level;
960ccca6
DH
694extern int core_compression_level;
695extern int core_compression_seen;
60bb8b14 696extern size_t packed_git_window_size;
77ccc5bb 697extern size_t packed_git_limit;
18bdec11 698extern size_t delta_base_cache_limit;
15366280 699extern unsigned long big_file_threshold;
568508e7 700extern unsigned long pack_size_limit_cfg;
afc711b8 701
4543926b
JK
702/*
703 * Accessors for the core.sharedrepository config which lazy-load the value
704 * from the config (if not already set). The "reset" function can be
705 * used to unset "set" or cached value, meaning that the value will be loaded
706 * fresh from the config file on the next call to get_shared_repository().
707 */
7875acb6
JK
708void set_shared_repository(int value);
709int get_shared_repository(void);
4543926b 710void reset_shared_repository(void);
7875acb6 711
afc711b8
MH
712/*
713 * Do replace refs need to be checked this run? This variable is
714 * initialized to true unless --no-replace-object is used or
715 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some
716 * commands that do not want replace references to be active. As an
717 * optimization it is also set to false if replace references have
718 * been sought but there were none.
719 */
720extern int check_replace_refs;
58d121b2 721extern char *git_replace_ref_base;
afc711b8 722
aafe9fba 723extern int fsync_object_files;
671c9b7e 724extern int core_preload_index;
08aefc9e 725extern int core_apply_sparse_checkout;
76759c7d 726extern int precomposed_unicode;
a42643aa 727extern int protect_hfs;
2b4c6efc 728extern int protect_ntfs;
c7b3a3d2 729extern int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
17712991 730
49672f26
JK
731/*
732 * Include broken refs in all ref iterations, which will
733 * generally choke dangerous operations rather than letting
734 * them silently proceed without taking the broken ref into
735 * account.
736 */
737extern int ref_paranoia;
738
eff80a9f
JH
739/*
740 * The character that begins a commented line in user-editable file
741 * that is subject to stripspace.
742 */
743extern char comment_line_char;
84c9dc2c 744extern int auto_comment_line_char;
eff80a9f 745
f30afdab
JS
746/* Windows only */
747enum hide_dotfiles_type {
748 HIDE_DOTFILES_FALSE = 0,
749 HIDE_DOTFILES_TRUE,
750 HIDE_DOTFILES_DOTGITONLY
751};
752extern enum hide_dotfiles_type hide_dotfiles;
753
9ed36cfa 754enum branch_track {
9188ed89 755 BRANCH_TRACK_UNSPECIFIED = -1,
9ed36cfa
JS
756 BRANCH_TRACK_NEVER = 0,
757 BRANCH_TRACK_REMOTE,
758 BRANCH_TRACK_ALWAYS,
759 BRANCH_TRACK_EXPLICIT,
4b05548f 760 BRANCH_TRACK_OVERRIDE
9ed36cfa
JS
761};
762
c998ae9b
DS
763enum rebase_setup_type {
764 AUTOREBASE_NEVER = 0,
765 AUTOREBASE_LOCAL,
766 AUTOREBASE_REMOTE,
4b05548f 767 AUTOREBASE_ALWAYS
c998ae9b
DS
768};
769
52153747 770enum push_default_type {
52153747
FAG
771 PUSH_DEFAULT_NOTHING = 0,
772 PUSH_DEFAULT_MATCHING,
b55e6775 773 PUSH_DEFAULT_SIMPLE,
53c40311 774 PUSH_DEFAULT_UPSTREAM,
f25950f3
CT
775 PUSH_DEFAULT_CURRENT,
776 PUSH_DEFAULT_UNSPECIFIED
52153747
FAG
777};
778
9ed36cfa 779extern enum branch_track git_branch_track;
c998ae9b 780extern enum rebase_setup_type autorebase;
52153747 781extern enum push_default_type push_default;
9ed36cfa 782
348df166
JS
783enum object_creation_mode {
784 OBJECT_CREATION_USES_HARDLINKS = 0,
4b05548f 785 OBJECT_CREATION_USES_RENAMES = 1
348df166
JS
786};
787
788extern enum object_creation_mode object_creation_mode;
be66a6c4 789
a97a7468
JS
790extern char *notes_ref_name;
791
7f3140cd
JS
792extern int grafts_replace_parents;
793
00a09d57
JK
794/*
795 * GIT_REPO_VERSION is the version we write by default. The
796 * _READ variant is the highest number we know how to
797 * handle.
798 */
ab9cb76f 799#define GIT_REPO_VERSION 0
00a09d57 800#define GIT_REPO_VERSION_READ 1
067fbd41 801extern int repository_format_precious_objects;
4b0d1eeb 802
2cc7c2c7
JK
803struct repository_format {
804 int version;
805 int precious_objects;
806 int is_bare;
807 char *work_tree;
808 struct string_list unknown_extensions;
809};
810
811/*
812 * Read the repository format characteristics from the config file "path" into
813 * "format" struct. Returns the numeric version. On error, -1 is returned,
814 * format->version is set to -1, and all other fields in the struct are
815 * undefined.
816 */
817int read_repository_format(struct repository_format *format, const char *path);
818
819/*
820 * Verify that the repository described by repository_format is something we
821 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe
822 * any errors encountered.
823 */
824int verify_repository_format(const struct repository_format *format,
825 struct strbuf *err);
826
4b0d1eeb
JK
827/*
828 * Check the repository format version in the path found in get_git_dir(),
829 * and die if it is a version we don't understand. Generally one would
830 * set_git_dir() before calling this, and use it only for "are we in a valid
831 * repo?".
832 */
833extern void check_repository_format(void);
ab9cb76f 834
734aab75
LT
835#define MTIME_CHANGED 0x0001
836#define CTIME_CHANGED 0x0002
837#define OWNER_CHANGED 0x0004
838#define MODE_CHANGED 0x0008
839#define INODE_CHANGED 0x0010
840#define DATA_CHANGED 0x0020
8ae0a8c5 841#define TYPE_CHANGED 0x0040
e83c5163 842
69ddd231
JK
843/*
844 * Return a statically allocated filename, either generically (mkpath), in
845 * the repository directory (git_path), or in a submodule's repository
846 * directory (git_path_submodule). In all cases, note that the result
847 * may be overwritten by another call to _any_ of the functions. Consider
07e3070d
JK
848 * using the safer "dup" or "strbuf" formats below (in some cases, the
849 * unsafe versions have already been removed).
69ddd231
JK
850 */
851extern const char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
852extern const char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
15cdfea7 853extern const char *git_common_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
69ddd231 854
108bebea
AR
855extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
856 __attribute__((format (printf, 3, 4)));
1a83c240
NTND
857extern void strbuf_git_path(struct strbuf *sb, const char *fmt, ...)
858 __attribute__((format (printf, 2, 3)));
15cdfea7
NTND
859extern void strbuf_git_common_path(struct strbuf *sb, const char *fmt, ...)
860 __attribute__((format (printf, 2, 3)));
bb3788ce
JK
861extern char *git_path_buf(struct strbuf *buf, const char *fmt, ...)
862 __attribute__((format (printf, 2, 3)));
99b43a61
JK
863extern int strbuf_git_path_submodule(struct strbuf *sb, const char *path,
864 const char *fmt, ...)
f5895fd3 865 __attribute__((format (printf, 3, 4)));
aba13e7c
AR
866extern char *git_pathdup(const char *fmt, ...)
867 __attribute__((format (printf, 1, 2)));
21cf3227
HKNN
868extern char *mkpathdup(const char *fmt, ...)
869 __attribute__((format (printf, 1, 2)));
f5895fd3 870extern char *git_pathdup_submodule(const char *path, const char *fmt, ...)
0bad611b 871 __attribute__((format (printf, 2, 3)));
108bebea 872
77a6d840 873extern void report_linked_checkout_garbage(void);
0bad611b 874
f932729c
JK
875/*
876 * You can define a static memoized git path like:
877 *
878 * static GIT_PATH_FUNC(git_path_foo, "FOO");
879 *
880 * or use one of the global ones below.
881 */
882#define GIT_PATH_FUNC(func, filename) \
883 const char *func(void) \
884 { \
885 static char *ret; \
886 if (!ret) \
887 ret = git_pathdup(filename); \
888 return ret; \
889 }
890
891const char *git_path_cherry_pick_head(void);
892const char *git_path_revert_head(void);
893const char *git_path_squash_msg(void);
894const char *git_path_merge_msg(void);
895const char *git_path_merge_rr(void);
896const char *git_path_merge_mode(void);
897const char *git_path_merge_head(void);
898const char *git_path_fetch_head(void);
899const char *git_path_shallow(void);
900
d40d535b
MH
901/*
902 * Return the name of the file in the local object database that would
903 * be used to store a loose object with the specified sha1. The
904 * return value is a pointer to a statically allocated buffer that is
905 * overwritten each time the function is called.
906 */
30d6c6ea 907extern const char *sha1_file_name(const unsigned char *sha1);
d40d535b
MH
908
909/*
910 * Return the name of the (local) packfile with the specified sha1 in
911 * its name. The return value is a pointer to memory that is
912 * overwritten each time this function is called.
913 */
bf592c50 914extern char *sha1_pack_name(const unsigned char *sha1);
d40d535b
MH
915
916/*
917 * Return the name of the (local) pack index file with the specified
918 * sha1 in its name. The return value is a pointer to memory that is
919 * overwritten each time this function is called.
920 */
bf592c50 921extern char *sha1_pack_index_name(const unsigned char *sha1);
d40d535b 922
af49c6d0
JK
923/*
924 * Return an abbreviated sha1 unique within this repository's object database.
925 * The result will be at least `len` characters long, and will be NUL
926 * terminated.
927 *
ef2ed501
JK
928 * The non-`_r` version returns a static buffer which remains valid until 4
929 * more calls to find_unique_abbrev are made.
af49c6d0
JK
930 *
931 * The `_r` variant writes to a buffer supplied by the caller, which must be at
932 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes
933 * written (excluding the NUL terminator).
934 *
935 * Note that while this version avoids the static buffer, it is not fully
936 * reentrant, as it calls into other non-reentrant git code.
937 */
938extern const char *find_unique_abbrev(const unsigned char *sha1, int len);
939extern int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len);
940
aa1c6fdf 941extern const unsigned char null_sha1[GIT_SHA1_RAWSZ];
3e56e724 942extern const struct object_id null_oid;
1a812f3a
IM
943
944static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
0bef57ee 945{
1a812f3a
IM
946 int i;
947
aa1c6fdf 948 for (i = 0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) {
1a812f3a
IM
949 if (*sha1 != *sha2)
950 return *sha1 - *sha2;
951 }
952
953 return 0;
0bef57ee 954}
1a812f3a 955
aa1c6fdf 956static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2)
957{
958 return hashcmp(oid1->hash, oid2->hash);
959}
960
1a812f3a 961static inline int is_null_sha1(const unsigned char *sha1)
a89fccd2 962{
1a812f3a 963 return !hashcmp(sha1, null_sha1);
a89fccd2 964}
1a812f3a 965
aa1c6fdf 966static inline int is_null_oid(const struct object_id *oid)
967{
968 return !hashcmp(oid->hash, null_sha1);
969}
970
e702496e
SP
971static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
972{
aa1c6fdf 973 memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ);
e702496e 974}
aa1c6fdf 975
976static inline void oidcpy(struct object_id *dst, const struct object_id *src)
977{
978 hashcpy(dst->hash, src->hash);
e702496e 979}
aa1c6fdf 980
a8e0d16d
JH
981static inline void hashclr(unsigned char *hash)
982{
aa1c6fdf 983 memset(hash, 0, GIT_SHA1_RAWSZ);
a8e0d16d 984}
e83c5163 985
aa1c6fdf 986static inline void oidclr(struct object_id *oid)
987{
988 hashclr(oid->hash);
989}
990
991
14d9c578
JK
992#define EMPTY_TREE_SHA1_HEX \
993 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
dab0d410 994#define EMPTY_TREE_SHA1_BIN_LITERAL \
14d9c578
JK
995 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
996 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
8576fde6
JK
997extern const struct object_id empty_tree_oid;
998#define EMPTY_TREE_SHA1_BIN (empty_tree_oid.hash)
14d9c578 999
f8582cad
JK
1000#define EMPTY_BLOB_SHA1_HEX \
1001 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
1002#define EMPTY_BLOB_SHA1_BIN_LITERAL \
1003 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
1004 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
8576fde6
JK
1005extern const struct object_id empty_blob_oid;
1006#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash)
1007
f8582cad
JK
1008
1009static inline int is_empty_blob_sha1(const unsigned char *sha1)
1010{
1011 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
1012}
1013
8576fde6
JK
1014static inline int is_empty_blob_oid(const struct object_id *oid)
1015{
1016 return !hashcmp(oid->hash, EMPTY_BLOB_SHA1_BIN);
1017}
1018
1019static inline int is_empty_tree_sha1(const unsigned char *sha1)
1020{
1021 return !hashcmp(sha1, EMPTY_TREE_SHA1_BIN);
1022}
1023
1024static inline int is_empty_tree_oid(const struct object_id *oid)
1025{
1026 return !hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN);
1027}
1028
1029
f2db68ed
HE
1030int git_mkstemp(char *path, size_t n, const char *template);
1031
b862b61c
MM
1032/* set default permissions by passing mode arguments to open(2) */
1033int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
1034int git_mkstemp_mode(char *pattern, int mode);
1035
06cbe855
HO
1036/*
1037 * NOTE NOTE NOTE!!
1038 *
1039 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
1040 * not be changed. Old repositories have core.sharedrepository written in
1041 * numeric format, and therefore these values are preserved for compatibility
1042 * reasons.
1043 */
94df2506 1044enum sharedrepo {
06cbe855
HO
1045 PERM_UMASK = 0,
1046 OLD_PERM_GROUP = 1,
1047 OLD_PERM_EVERYBODY = 2,
1048 PERM_GROUP = 0660,
4b05548f 1049 PERM_EVERYBODY = 0664
94df2506
JH
1050};
1051int git_config_perm(const char *var, const char *value);
3a429d3b 1052int adjust_shared_perm(const char *path);
0be0521b
MH
1053
1054/*
1055 * Create the directory containing the named path, using care to be
1056 * somewhat safe against races. Return one of the scld_error values
1057 * to indicate success/failure.
18d37e86
MH
1058 *
1059 * SCLD_VANISHED indicates that one of the ancestor directories of the
1060 * path existed at one point during the function call and then
1061 * suddenly vanished, probably because another process pruned the
1062 * directory while we were working. To be robust against this kind of
1063 * race, callers might want to try invoking the function again when it
1064 * returns SCLD_VANISHED.
e95792e5
MH
1065 *
1066 * safe_create_leading_directories() temporarily changes path while it
1067 * is working but restores it before returning.
1068 * safe_create_leading_directories_const() doesn't modify path, even
1069 * temporarily.
0be0521b
MH
1070 */
1071enum scld_error {
1072 SCLD_OK = 0,
1073 SCLD_FAILED = -1,
1074 SCLD_PERMS = -2,
18d37e86
MH
1075 SCLD_EXISTS = -3,
1076 SCLD_VANISHED = -4
0be0521b
MH
1077};
1078enum scld_error safe_create_leading_directories(char *path);
1079enum scld_error safe_create_leading_directories_const(const char *path);
1080
90a6464b 1081int mkdir_in_gitdir(const char *path);
395de250 1082extern char *expand_user_path(const char *path);
1c64b48e 1083const char *enter_repo(const char *path, int strict);
e5392c51
JS
1084static inline int is_absolute_path(const char *path)
1085{
88135203 1086 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
e5392c51 1087}
90b4a71c 1088int is_directory(const char *);
e2a57aac 1089const char *real_path(const char *path);
e3e46cdb 1090const char *real_path_if_valid(const char *path);
e2a57aac 1091const char *absolute_path(const char *path);
41894ae3 1092const char *remove_leading_path(const char *in, const char *prefix);
e02ca72f 1093const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);
645a29c4 1094int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
f3cad0ad 1095int normalize_path_copy(char *dst, const char *src);
31171d9e 1096int longest_ancestor_length(const char *path, struct string_list *prefixes);
4fcc86b0 1097char *strip_path_suffix(const char *path, const char *suffix);
34b6cb8b 1098int daemon_avoid_alias(const char *path);
1d1d69bc 1099extern int is_ntfs_dotgit(const char *name);
b2cb9425 1100
ea19289b
PT
1101/**
1102 * Return a newly allocated string with the evaluation of
1103 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise
1104 * "$HOME/.config/git/$filename". Return NULL upon error.
1105 */
1106extern char *xdg_config_home(const char *filename);
1107
e1111cef 1108/* object replacement */
ffe68cf9 1109#define LOOKUP_REPLACE_OBJECT 1
46f03448 1110#define LOOKUP_UNKNOWN_OBJECT 2
5bf29b95 1111extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
f5552aee
CC
1112static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
1113{
ffe68cf9 1114 return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);
5bf29b95 1115}
1f91e79c
MH
1116
1117/*
1118 * This internal function is only declared here for the benefit of
1119 * lookup_replace_object(). Please do not call it directly.
1120 */
e1111cef 1121extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
1f91e79c
MH
1122
1123/*
1124 * If object sha1 should be replaced, return the replacement object's
1125 * name (replaced recursively, if necessary). The return value is
1126 * either sha1 or a pointer to a permanently-allocated value. When
1127 * object replacement is suppressed, always return sha1.
1128 */
e1111cef
JH
1129static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
1130{
afc711b8 1131 if (!check_replace_refs)
e1111cef
JH
1132 return sha1;
1133 return do_lookup_replace_object(sha1);
f5552aee 1134}
1f91e79c 1135
bf93eea0
CC
1136static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag)
1137{
1138 if (!(flag & LOOKUP_REPLACE_OBJECT))
1139 return sha1;
1140 return lookup_replace_object(sha1);
1141}
e1111cef 1142
e83c5163 1143/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
21666f1a 1144extern int sha1_object_info(const unsigned char *, unsigned long *);
ce9fbf16 1145extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
c00e657d 1146extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
0c3db67c 1147extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, unsigned char *sha1, unsigned flags);
21666f1a 1148extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
bbac7311 1149extern int force_object_loose(const unsigned char *sha1, time_t mtime);
a5436b57 1150extern int git_open(const char *name);
f0270efd 1151extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
eb4f4076 1152extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
f0270efd 1153extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
8237b185 1154
0e8189e2
NP
1155/* global flag to enable extra checks when accessing packed objects */
1156extern int do_check_packed_object_crc;
1157
5d6ccf5c 1158extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
e83c5163 1159
cb5add58 1160extern int finalize_object_file(const char *tmpfile, const char *filename);
8237b185 1161
cd673c1f 1162extern int has_sha1_pack(const unsigned char *sha1);
d40d535b
MH
1163
1164/*
1165 * Return true iff we have an object named sha1, whether local or in
1166 * an alternate object database, and whether packed or loose. This
1167 * function does not respect replace references.
0eeb077b
JK
1168 *
1169 * If the QUICK flag is set, do not re-check the pack directory
1170 * when we cannot find the object (this means we may give a false
1171 * negative answer if another process is simultaneously repacking).
d40d535b 1172 */
0eeb077b
JK
1173#define HAS_SHA1_QUICK 0x1
1174extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags);
1175static inline int has_sha1_file(const unsigned char *sha1)
1176{
1177 return has_sha1_file_with_flags(sha1, 0);
1178}
d40d535b 1179
b419aa25 1180/* Same as the above, except for struct object_id. */
1181extern int has_object_file(const struct object_id *oid);
5827a035 1182extern int has_object_file_with_flags(const struct object_id *oid, int flags);
b419aa25 1183
d40d535b
MH
1184/*
1185 * Return true iff an alternate object database has a loose object
1186 * with the specified name. This function does not respect replace
1187 * references.
1188 */
0f4dc14a 1189extern int has_loose_object_nonlocal(const unsigned char *sha1);
8237b185 1190
bf592c50
DB
1191extern int has_pack_index(const unsigned char *sha1);
1192
40d52ff7
JK
1193extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
1194
192a6be2
LT
1195extern const signed char hexval_table[256];
1196static inline unsigned int hexval(unsigned char c)
e49521b5
JH
1197{
1198 return hexval_table[c];
1199}
1200
d2330973
RS
1201/*
1202 * Convert two consecutive hexadecimal digits into a char. Return a
1203 * negative value on error. Don't run over the end of short strings.
1204 */
1205static inline int hex2chr(const char *s)
1206{
1207 int val = hexval(s[0]);
1208 return (val < 0) ? val : (val << 4) | hexval(s[1]);
1209}
1210
e83c5163 1211/* Convert to/from hex/sha1 representation */
dce96489
LT
1212#define MINIMUM_ABBREV minimum_abbrev
1213#define DEFAULT_ABBREV default_abbrev
46a6c262 1214
65acfeac
JH
1215/* used when the code does not know or care what the default abbrev is */
1216#define FALLBACK_DEFAULT_ABBREV 7
1217
573285e5
CP
1218struct object_context {
1219 unsigned char tree[20];
1220 char path[PATH_MAX];
1221 unsigned mode;
c4ec9677
DT
1222 /*
1223 * symlink_path is only used by get_tree_entry_follow_symlinks,
1224 * and only for symlinks that point outside the repository.
1225 */
1226 struct strbuf symlink_path;
573285e5
CP
1227};
1228
c4ec9677
DT
1229#define GET_SHA1_QUIETLY 01
1230#define GET_SHA1_COMMIT 02
1231#define GET_SHA1_COMMITTISH 04
1232#define GET_SHA1_TREE 010
1233#define GET_SHA1_TREEISH 020
1234#define GET_SHA1_BLOB 040
1235#define GET_SHA1_FOLLOW_SYMLINKS 0100
1236#define GET_SHA1_ONLY_TO_DIE 04000
37c00e55 1237
259942f5
JK
1238#define GET_SHA1_DISAMBIGUATORS \
1239 (GET_SHA1_COMMIT | GET_SHA1_COMMITTISH | \
1240 GET_SHA1_TREE | GET_SHA1_TREEISH | \
1241 GET_SHA1_BLOB)
1242
3c249c95 1243extern int get_sha1(const char *str, unsigned char *sha1);
daba53ae 1244extern int get_sha1_commit(const char *str, unsigned char *sha1);
cd74e473 1245extern int get_sha1_committish(const char *str, unsigned char *sha1);
daba53ae
JH
1246extern int get_sha1_tree(const char *str, unsigned char *sha1);
1247extern int get_sha1_treeish(const char *str, unsigned char *sha1);
1248extern int get_sha1_blob(const char *str, unsigned char *sha1);
8c135ea2 1249extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
33bd598c 1250extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);
d4e85a1a 1251
2764fd93 1252extern int get_oid(const char *str, struct object_id *oid);
1253
957d7406
JH
1254typedef int each_abbrev_fn(const unsigned char *sha1, void *);
1255extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
d4e85a1a 1256
5b33cb1f
JK
1257extern int set_disambiguate_hint_config(const char *var, const char *value);
1258
d4e85a1a
MH
1259/*
1260 * Try to read a SHA1 in hexadecimal format from the 40 characters
1261 * starting at hex. Write the 20-byte result to sha1 in binary form.
1262 * Return 0 on success. Reading stops if a NUL is encountered in the
1263 * input, so it is safe to pass this function an arbitrary
1264 * null-terminated string.
1265 */
197ee8c9 1266extern int get_sha1_hex(const char *hex, unsigned char *sha1);
aa1c6fdf 1267extern int get_oid_hex(const char *hex, struct object_id *sha1);
d4e85a1a 1268
af49c6d0
JK
1269/*
1270 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,
1271 * and writes the NUL-terminated output to the buffer `out`, which must be at
1272 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for
1273 * convenience.
1274 *
1275 * The non-`_r` variant returns a static buffer, but uses a ring of 4
1276 * buffers, making it safe to make multiple calls for a single statement, like:
1277 *
1278 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));
1279 */
1280extern char *sha1_to_hex_r(char *out, const unsigned char *sha1);
55c529a7 1281extern char *oid_to_hex_r(char *out, const struct object_id *oid);
197ee8c9 1282extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
aa1c6fdf 1283extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */
7cb36842 1284
cf99a761 1285extern int interpret_branch_name(const char *str, int len, struct strbuf *);
151b2911 1286extern int get_oid_mb(const char *str, struct object_id *oid);
e86eb666 1287
c847f537 1288extern int validate_headref(const char *ref);
e83c5163 1289
958ba6c9 1290extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
0ab9e1e8 1291extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
ccdd4a0f 1292extern int name_compare(const char *name1, size_t len1, const char *name2, size_t len2);
b60e188c 1293extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
e83c5163 1294
40469ee9 1295extern void *read_object_with_reference(const unsigned char *sha1,
bf0f910d 1296 const char *required_type,
40469ee9
JH
1297 unsigned long *size,
1298 unsigned char *sha1_ret);
f4913f91 1299
81776315
JH
1300extern struct object *peel_to_type(const char *name, int namelen,
1301 struct object *o, enum object_type);
1302
a5481a6c
JK
1303struct date_mode {
1304 enum date_mode_type {
1305 DATE_NORMAL = 0,
1306 DATE_RELATIVE,
1307 DATE_SHORT,
a5481a6c
JK
1308 DATE_ISO8601,
1309 DATE_ISO8601_STRICT,
1310 DATE_RFC2822,
aa1462cc 1311 DATE_STRFTIME,
642833db
JK
1312 DATE_RAW,
1313 DATE_UNIX
a5481a6c 1314 } type;
aa1462cc 1315 const char *strftime_fmt;
add00ba2 1316 int local;
73013afd
JH
1317};
1318
a5481a6c
JK
1319/*
1320 * Convenience helper for passing a constant type, like:
1321 *
1322 * show_date(t, tz, DATE_MODE(NORMAL));
1323 */
1324#define DATE_MODE(t) date_mode_from_type(DATE_##t)
1325struct date_mode *date_mode_from_type(enum date_mode_type type);
1326
1327const char *show_date(unsigned long time, int timezone, const struct date_mode *mode);
7d29afd4
JN
1328void show_date_relative(unsigned long time, int tz, const struct timeval *now,
1329 struct strbuf *timebuf);
c33ddc2e 1330int parse_date(const char *date, struct strbuf *out);
9644c061 1331int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
3d27b9b0 1332int parse_expiry_date(const char *date, unsigned long *timestamp);
c33ddc2e 1333void datestamp(struct strbuf *out);
93cfa7c7
JH
1334#define approxidate(s) approxidate_careful((s), NULL)
1335unsigned long approxidate_careful(const char *, int *);
33012fc4 1336unsigned long approxidate_relative(const char *date, const struct timeval *now);
a5481a6c 1337void parse_date_format(const char *format, struct date_mode *mode);
7ca36d93 1338int date_overflows(unsigned long date);
ecee9d9e 1339
f9bc573f 1340#define IDENT_STRICT 1
b9f0ac17 1341#define IDENT_NO_DATE 2
c15e1987 1342#define IDENT_NO_NAME 4
749be728
JH
1343extern const char *git_author_info(int);
1344extern const char *git_committer_info(int);
798123af 1345extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
d9ccfe77 1346extern const char *fmt_name(const char *name, const char *email);
9830534e 1347extern const char *ident_default_name(void);
bcb2b004 1348extern const char *ident_default_email(void);
44fcb497 1349extern const char *git_editor(void);
64778d24 1350extern const char *git_pager(int stdout_is_tty);
9597921b 1351extern int git_ident_config(const char *, const char *, void *);
4d9c7e6f 1352extern void reset_ident_date(void);
6aa33f40 1353
4b340cfa
JH
1354struct ident_split {
1355 const char *name_begin;
1356 const char *name_end;
1357 const char *mail_begin;
1358 const char *mail_end;
1359 const char *date_begin;
1360 const char *date_end;
1361 const char *tz_begin;
1362 const char *tz_end;
1363};
1364/*
1365 * Signals an success with 0, but time part of the result may be NULL
1366 * if the input lacks timestamp and zone
1367 */
1368extern int split_ident_line(struct ident_split *, const char *, int);
1369
d1053246
JK
1370/*
1371 * Like show_date, but pull the timestamp and tz parameters from
1372 * the ident_split. It will also sanity-check the values and produce
1373 * a well-known sentinel date if they appear bogus.
1374 */
a5481a6c
JK
1375const char *show_ident_date(const struct ident_split *id,
1376 const struct date_mode *mode);
d1053246 1377
662cc30c
JK
1378/*
1379 * Compare split idents for equality or strict ordering. Note that we
1380 * compare only the ident part of the line, ignoring any timestamp.
1381 *
1382 * Because there are two fields, we must choose one as the primary key; we
1383 * currently arbitrarily pick the email.
1384 */
1385extern int ident_cmp(const struct ident_split *, const struct ident_split *);
1386
12dccc16 1387struct checkout {
d4a2024a 1388 struct index_state *istate;
12dccc16
LT
1389 const char *base_dir;
1390 int base_dir_len;
1391 unsigned force:1,
1392 quiet:1,
1393 not_new:1,
1394 refresh_cache:1;
1395};
68e3d629 1396#define CHECKOUT_INIT { NULL, "" }
12dccc16 1397
af2a651d 1398#define TEMPORARY_FILENAME_LENGTH 25
efbc5831 1399extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
b9fd2846
LT
1400
1401struct cache_def {
e7c73053 1402 struct strbuf path;
b9fd2846
LT
1403 int flags;
1404 int track_flags;
1405 int prefix_len_stat_func;
1406};
e7c73053 1407#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }
2a608391 1408static inline void cache_def_clear(struct cache_def *cache)
e7c73053
KB
1409{
1410 strbuf_release(&cache->path);
1411}
b9fd2846 1412
57199892 1413extern int has_symlink_leading_path(const char *name, int len);
b9fd2846 1414extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
f66caaf9 1415extern int check_leading_path(const char *name, int len);
57199892 1416extern int has_dirs_only_path(const char *name, int len, int prefix_len);
78478927
KB
1417extern void schedule_dir_for_removal(const char *name, int len);
1418extern void remove_scheduled_dirs(void);
12dccc16 1419
9a217f2a 1420extern struct alternate_object_database {
d5a63b99 1421 struct alternate_object_database *next;
597f9134 1422
38dbe5f0
JK
1423 /* see alt_scratch_buf() */
1424 struct strbuf scratch;
1425 size_t base_len;
597f9134
JK
1426
1427 char path[FLEX_ARRAY];
d5a63b99 1428} *alt_odb_list;
9a217f2a 1429extern void prepare_alt_odb(void);
5e73633d 1430extern void read_info_alternates(const char * relative_base, int depth);
9eeea7d2 1431extern char *compute_alternate_path(const char *path, struct strbuf *err);
d79796bc 1432typedef int alt_odb_fn(struct alternate_object_database *, void *);
fe1b2268 1433extern int foreach_alt_odb(alt_odb_fn, void*);
9a217f2a 1434
7f0fa2c0
JK
1435/*
1436 * Allocate a "struct alternate_object_database" but do _not_ actually
1437 * add it to the list of alternates.
1438 */
1439struct alternate_object_database *alloc_alt_odb(const char *dir);
1440
a5b34d21
JK
1441/*
1442 * Add the directory to the on-disk alternates file; the new entry will also
1443 * take effect in the current process.
1444 */
1445extern void add_to_alternates_file(const char *dir);
1446
1447/*
1448 * Add the directory to the in-memory list of alternates (along with any
1449 * recursive alternates it points to), but do not modify the on-disk alternates
1450 * file.
1451 */
1452extern void add_to_alternates_memory(const char *dir);
1453
38dbe5f0
JK
1454/*
1455 * Returns a scratch strbuf pre-filled with the alternate object directory,
1456 * including a trailing slash, which can be used to access paths in the
1457 * alternate. Always use this over direct access to alt->scratch, as it
1458 * cleans up any previous use of the scratch buffer.
1459 */
1460extern struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);
1461
c41ee586
SP
1462struct pack_window {
1463 struct pack_window *next;
1464 unsigned char *base;
1465 off_t offset;
1466 size_t len;
1467 unsigned int last_used;
1468 unsigned int inuse_cnt;
1469};
1470
9a217f2a
JH
1471extern struct packed_git {
1472 struct packed_git *next;
c41ee586 1473 struct pack_window *windows;
2dc3a234 1474 off_t pack_size;
57059091
NP
1475 const void *index_data;
1476 size_t index_size;
1477 uint32_t num_objects;
8eca0b47
NP
1478 uint32_t num_bad_objects;
1479 unsigned char *bad_object_sha1;
42873078 1480 int index_version;
57059091 1481 time_t mtime;
9bc879c1 1482 int pack_fd;
8d25931d 1483 unsigned pack_local:1,
d131b7af 1484 pack_keep:1,
ee1c6c34 1485 freshened:1,
d131b7af 1486 do_not_close:1;
bf592c50 1487 unsigned char sha1[20];
9d98bbf5 1488 struct revindex_entry *revindex;
8f1d2e6f
JH
1489 /* something like ".git/objects/pack/xxxxx.pack" */
1490 char pack_name[FLEX_ARRAY]; /* more */
9a217f2a 1491} *packed_git;
f3bf9224 1492
a73cdd21
JK
1493/*
1494 * A most-recently-used ordered version of the packed_git list, which can
1495 * be iterated instead of packed_git (and marked via mru_mark).
1496 */
1497struct mru;
1498extern struct mru *packed_git_mru;
1499
f3bf9224 1500struct pack_entry {
c4001d92 1501 off_t offset;
f3bf9224
JH
1502 unsigned char sha1[20];
1503 struct packed_git *p;
1504};
1505
7b64469a 1506extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
bf592c50 1507
0a489b06
JH
1508/* A hook to report invalid files in pack directory */
1509#define PACKDIR_FILE_PACK 1
1510#define PACKDIR_FILE_IDX 2
1511#define PACKDIR_FILE_GARBAGE 4
1512extern void (*report_garbage)(unsigned seen_bits, const char *path);
543c5caa 1513
9a217f2a 1514extern void prepare_packed_git(void);
fc04c412 1515extern void reprepare_packed_git(void);
bf592c50
DB
1516extern void install_packed_git(struct packed_git *pack);
1517
8e3f52d7
JK
1518/*
1519 * Give a rough count of objects in the repository. This sacrifices accuracy
1520 * for speed.
1521 */
1522unsigned long approximate_object_count(void);
1523
a6080a0a 1524extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
bf592c50
DB
1525 struct packed_git *packs);
1526
276bc2ca 1527extern void pack_report(void);
d40d535b
MH
1528
1529/*
1530 * mmap the index file for the specified packfile (if it is not
1531 * already mmapped). Return 0 on success.
1532 */
d079837e 1533extern int open_pack_index(struct packed_git *);
d40d535b
MH
1534
1535/*
1536 * munmap the index file for the specified packfile (if it is
1537 * currently mmapped).
1538 */
fa5fc15d 1539extern void close_pack_index(struct packed_git *);
d40d535b 1540
ef49a7a0 1541extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
c9ced051 1542extern void close_pack_windows(struct packed_git *);
38849a81 1543extern void close_all_packs(void);
03e79c88 1544extern void unuse_pack(struct pack_window **);
3d20c636 1545extern void clear_delta_base_cache(void);
48bcc1c3 1546extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local);
d40d535b 1547
47fe3f6e
JK
1548/*
1549 * Make sure that a pointer access into an mmap'd index file is within bounds,
1550 * and can provide at least 8 bytes of data.
1551 *
1552 * Note that this is only necessary for variable-length segments of the file
1553 * (like the 64-bit extended offset table), as we compare the size to the
1554 * fixed-length parts when we open the file.
1555 */
1556extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr);
1557
d40d535b
MH
1558/*
1559 * Return the SHA-1 of the nth object within the specified packfile.
1560 * Open the index if it is not already open. The return value points
1561 * at the SHA-1 within the mmapped index. Return NULL if there is an
1562 * error.
1563 */
1564extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
1565
1566/*
1567 * Return the offset of the nth object within the specified packfile.
1568 * The index must already be opened.
1569 */
1570extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);
1571
1572/*
1573 * If the object named sha1 is present in the specified packfile,
1574 * return its offset within the packfile; otherwise, return 0.
1575 */
1576extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
1577
4c080182 1578extern int is_pack_valid(struct packed_git *);
c4001d92 1579extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
09ded04b 1580extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
54dab52a 1581extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
f8c8abc5 1582extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
9a217f2a 1583
27e1e22d
JK
1584/*
1585 * Iterate over the files in the loose-object parts of the object
1586 * directory "path", triggering the following callbacks:
1587 *
1588 * - loose_object is called for each loose object we find.
1589 *
1590 * - loose_cruft is called for any files that do not appear to be
1591 * loose objects. Note that we only look in the loose object
1592 * directories "objects/[0-9a-f]{2}/", so we will not report
1593 * "objects/foobar" as cruft.
1594 *
1595 * - loose_subdir is called for each top-level hashed subdirectory
1596 * of the object directory (e.g., "$OBJDIR/f0"). It is called
1597 * after the objects in the directory are processed.
1598 *
1599 * Any callback that is NULL will be ignored. Callbacks returning non-zero
1600 * will end the iteration.
e6f875e0
JK
1601 *
1602 * In the "buf" variant, "path" is a strbuf which will also be used as a
1603 * scratch buffer, but restored to its original contents before
1604 * the function returns.
27e1e22d
JK
1605 */
1606typedef int each_loose_object_fn(const unsigned char *sha1,
1607 const char *path,
1608 void *data);
1609typedef int each_loose_cruft_fn(const char *basename,
1610 const char *path,
1611 void *data);
1612typedef int each_loose_subdir_fn(int nr,
1613 const char *path,
1614 void *data);
1615int for_each_loose_file_in_objdir(const char *path,
1616 each_loose_object_fn obj_cb,
1617 each_loose_cruft_fn cruft_cb,
1618 each_loose_subdir_fn subdir_cb,
1619 void *data);
e6f875e0
JK
1620int for_each_loose_file_in_objdir_buf(struct strbuf *path,
1621 each_loose_object_fn obj_cb,
1622 each_loose_cruft_fn cruft_cb,
1623 each_loose_subdir_fn subdir_cb,
1624 void *data);
27e1e22d 1625
660c889e
JK
1626/*
1627 * Iterate over loose and packed objects in both the local
1385bb7b
JK
1628 * repository and any alternates repositories (unless the
1629 * LOCAL_ONLY flag is set).
660c889e 1630 */
1385bb7b 1631#define FOR_EACH_OBJECT_LOCAL_ONLY 0x1
660c889e
JK
1632typedef int each_packed_object_fn(const unsigned char *sha1,
1633 struct packed_git *pack,
1634 uint32_t pos,
1635 void *data);
1385bb7b
JK
1636extern int for_each_loose_object(each_loose_object_fn, void *, unsigned flags);
1637extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags);
660c889e 1638
9a490590
JH
1639struct object_info {
1640 /* Request */
5b086407 1641 enum object_type *typep;
9a490590 1642 unsigned long *sizep;
166df26f 1643 off_t *disk_sizep;
5d642e75 1644 unsigned char *delta_base_sha1;
46f03448 1645 struct strbuf *typename;
9a490590
JH
1646
1647 /* Response */
1648 enum {
1649 OI_CACHED,
1650 OI_LOOSE,
5266d369
JH
1651 OI_PACKED,
1652 OI_DBCACHED
9a490590
JH
1653 } whence;
1654 union {
1655 /*
1656 * struct {
1657 * ... Nothing to expose in this case
1658 * } cached;
1659 * struct {
1660 * ... Nothing to expose in this case
1661 * } loose;
1662 */
1663 struct {
1664 struct packed_git *pack;
1665 off_t offset;
1666 unsigned int is_delta;
1667 } packed;
1668 } u;
1669};
27b5c1a0
JK
1670
1671/*
1672 * Initializer for a "struct object_info" that wants no items. You may
1673 * also memset() the memory to all-zeroes.
1674 */
1675#define OBJECT_INFO_INIT {NULL}
1676
de7b5d62 1677extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags);
ca79c985 1678extern int packed_object_info(struct packed_git *pack, off_t offset, struct object_info *);
9a217f2a 1679
8f3f9b09
JH
1680/* Dumb servers support */
1681extern int update_server_info(int);
1682
7a397419
MG
1683/* git_config_parse_key() returns these negated: */
1684#define CONFIG_INVALID_KEY 1
1685#define CONFIG_NO_SECTION_OR_NAME 2
30598ad0 1686/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */
7a397419
MG
1687#define CONFIG_NO_LOCK -1
1688#define CONFIG_INVALID_FILE 3
1689#define CONFIG_NO_WRITE 4
1690#define CONFIG_NOTHING_SET 5
1691#define CONFIG_INVALID_PATTERN 6
9409c7a5 1692#define CONFIG_GENERIC_ERROR 7
7a397419 1693
c1063be2
JK
1694#define CONFIG_REGEX_NONE ((void *)1)
1695
c8985ce0 1696struct git_config_source {
3caec73b 1697 unsigned int use_stdin:1;
c8985ce0
KS
1698 const char *file;
1699 const char *blob;
1700};
1701
1b8132d9
VA
1702enum config_origin_type {
1703 CONFIG_ORIGIN_BLOB,
1704 CONFIG_ORIGIN_FILE,
1705 CONFIG_ORIGIN_STDIN,
1706 CONFIG_ORIGIN_SUBMODULE_BLOB,
1707 CONFIG_ORIGIN_CMDLINE
1708};
1709
ef90d6d4
JS
1710typedef int (*config_fn_t)(const char *, const char *, void *);
1711extern int git_default_config(const char *, const char *, void *);
1712extern int git_config_from_file(config_fn_t fn, const char *, void *);
1b8132d9 1713extern int git_config_from_mem(config_fn_t fn, const enum config_origin_type,
473166b9 1714 const char *name, const char *buf, size_t len, void *data);
2b64fc89 1715extern void git_config_push_parameter(const char *text);
b3d83d9f 1716extern int git_config_from_parameters(config_fn_t fn, void *data);
aace4385 1717extern void git_config(config_fn_t fn, void *);
9b25a0b5 1718extern int git_config_with_options(config_fn_t fn, void *,
c8985ce0 1719 struct git_config_source *config_source,
1bc88819 1720 int respect_includes);
0b87b6e0 1721extern int git_parse_ulong(const char *, unsigned long *);
9a549d43 1722extern int git_parse_maybe_bool(const char *);
17712991 1723extern int git_config_int(const char *, const char *);
00160242 1724extern int64_t git_config_int64(const char *, const char *);
0b87b6e0 1725extern unsigned long git_config_ulong(const char *, const char *);
a53f2ec6 1726extern int git_config_bool_or_int(const char *, const char *, int *);
17712991 1727extern int git_config_bool(const char *, const char *);
8420ccd8 1728extern int git_config_maybe_bool(const char *, const char *);
ea5105a5 1729extern int git_config_string(const char **, const char *, const char *);
395de250 1730extern int git_config_pathname(const char **, const char *, const char *);
30598ad0 1731extern int git_config_set_in_file_gently(const char *, const char *, const char *);
3d180648 1732extern void git_config_set_in_file(const char *, const char *, const char *);
30598ad0 1733extern int git_config_set_gently(const char *, const char *);
3d180648 1734extern void git_config_set(const char *, const char *);
b09c53a3 1735extern int git_config_parse_key(const char *, char **, int *);
9e9de18f 1736extern int git_config_key_is_valid(const char *key);
30598ad0 1737extern int git_config_set_multivar_gently(const char *, const char *, const char *, int);
3d180648 1738extern void git_config_set_multivar(const char *, const char *, const char *, int);
30598ad0 1739extern int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, int);
3d180648 1740extern void git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
0667fcfb 1741extern int git_config_rename_section(const char *, const char *);
42bd39b5 1742extern int git_config_rename_section_in_file(const char *, const char *, const char *);
506b17b1 1743extern const char *git_etc_gitconfig(void);
0ef37164 1744extern int git_env_bool(const char *, int);
23b0c478 1745extern unsigned long git_env_ulong(const char *, unsigned long);
ab88c363 1746extern int git_config_system(void);
40ea4ed9 1747extern int config_error_nonbool(const char *);
ff0a80af 1748#if defined(__GNUC__)
87fe5df3 1749#define config_error_nonbool(s) (config_error_nonbool(s), const_error())
a469a101 1750#endif
a6fa5992
PN
1751extern const char *get_log_output_encoding(void);
1752extern const char *get_commit_output_encoding(void);
1753
2496844b 1754extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
9acc5911
JK
1755
1756enum config_scope {
1757 CONFIG_SCOPE_UNKNOWN = 0,
1758 CONFIG_SCOPE_SYSTEM,
1759 CONFIG_SCOPE_GLOBAL,
1760 CONFIG_SCOPE_REPO,
1761 CONFIG_SCOPE_CMDLINE,
1762};
1763
1764extern enum config_scope current_config_scope(void);
473166b9
LS
1765extern const char *current_config_origin_type(void);
1766extern const char *current_config_name(void);
2496844b 1767
9b25a0b5
JK
1768struct config_include_data {
1769 int depth;
1770 config_fn_t fn;
1771 void *data;
1772};
1773#define CONFIG_INCLUDE_INIT { 0 }
1774extern int git_config_include(const char *name, const char *value, void *data);
17712991 1775
1b86bbb0
JK
1776/*
1777 * Match and parse a config key of the form:
1778 *
1779 * section.(subsection.)?key
1780 *
1781 * (i.e., what gets handed to a config_fn_t). The caller provides the section;
1782 * we return -1 if it does not match, 0 otherwise. The subsection and key
1783 * out-parameters are filled by the function (and subsection is NULL if it is
1784 * missing).
1785 */
1786extern int parse_config_key(const char *var,
1787 const char *section,
1788 const char **subsection, int *subsection_len,
1789 const char **key);
1790
155ef25f
TA
1791struct config_set_element {
1792 struct hashmap_entry ent;
1793 char *key;
1794 struct string_list value_list;
1795};
1796
1797struct configset_list_item {
1798 struct config_set_element *e;
1799 int value_index;
1800};
1801
1802/*
1803 * the contents of the list are ordered according to their
1804 * position in the config files and order of parsing the files.
1805 * (i.e. key-value pair at the last position of .git/config will
1806 * be at the last item of the list)
1807 */
1808struct configset_list {
1809 struct configset_list_item *items;
1810 unsigned int nr, alloc;
1811};
1812
3c8687a7
TA
1813struct config_set {
1814 struct hashmap config_hash;
1815 int hash_initialized;
155ef25f 1816 struct configset_list list;
3c8687a7
TA
1817};
1818
1819extern void git_configset_init(struct config_set *cs);
1820extern int git_configset_add_file(struct config_set *cs, const char *filename);
1821extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value);
1822extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key);
1823extern void git_configset_clear(struct config_set *cs);
1824extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest);
1825extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest);
1826extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest);
1827extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest);
1828extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest);
1829extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest);
1830extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest);
1831extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest);
1832
1833extern int git_config_get_value(const char *key, const char **value);
1834extern const struct string_list *git_config_get_value_multi(const char *key);
1835extern void git_config_clear(void);
1836extern void git_config_iter(config_fn_t fn, void *data);
1837extern int git_config_get_string_const(const char *key, const char **dest);
1838extern int git_config_get_string(const char *key, char **dest);
1839extern int git_config_get_int(const char *key, int *dest);
1840extern int git_config_get_ulong(const char *key, unsigned long *dest);
1841extern int git_config_get_bool(const char *key, int *dest);
1842extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest);
1843extern int git_config_get_maybe_bool(const char *key, int *dest);
1844extern int git_config_get_pathname(const char *key, const char **dest);
435ec090 1845extern int git_config_get_untracked_cache(void);
3c8687a7 1846
dae6c322
CC
1847/*
1848 * This is a hack for test programs like test-dump-untracked-cache to
1849 * ensure that they do not modify the untracked cache when reading it.
1850 * Do not use it otherwise!
1851 */
1852extern int ignore_untracked_cache_config;
3c8687a7 1853
3df8fd62
TA
1854struct key_value_info {
1855 const char *filename;
1856 int linenr;
1b8132d9 1857 enum config_origin_type origin_type;
9acc5911 1858 enum config_scope scope;
3df8fd62
TA
1859};
1860
5a80e97c
TA
1861extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3)));
1862extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr);
1863
d6991cee
JK
1864extern int committer_ident_sufficiently_given(void);
1865extern int author_ident_sufficiently_given(void);
e1b10391 1866
1a8f2741 1867extern const char *git_commit_encoding;
3a55602e 1868extern const char *git_log_output_encoding;
d551a488 1869extern const char *git_mailmap_file;
08610900 1870extern const char *git_mailmap_blob;
4e72dcec 1871
06f59e9f
TT
1872/* IO helper functions */
1873extern void maybe_flush_or_die(FILE *, const char *);
9540ce50
JK
1874__attribute__((format (printf, 2, 3)))
1875extern void fprintf_or_die(FILE *, const char *fmt, ...);
00b7cbfc
JH
1876
1877#define COPY_READ_ERROR (-2)
1878#define COPY_WRITE_ERROR (-3)
f3123c4a 1879extern int copy_fd(int ifd, int ofd);
1468bd47 1880extern int copy_file(const char *dst, const char *src, int mode);
f7835a25 1881extern int copy_file_with_time(const char *dst, const char *src, int mode);
00b7cbfc 1882
7230e6d0 1883extern void write_or_die(int fd, const void *buf, size_t count);
4c81b03e 1884extern void fsync_or_die(int fd, const char *);
ad897215 1885
2b7ca830
JM
1886extern ssize_t read_in_full(int fd, void *buf, size_t count);
1887extern ssize_t write_in_full(int fd, const void *buf, size_t count);
426ddeea
YM
1888extern ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset);
1889
2b7ca830
JM
1890static inline ssize_t write_str_in_full(int fd, const char *str)
1891{
1892 return write_in_full(fd, str, strlen(str));
1893}
12d6ce1d 1894
52563d7e
JK
1895/**
1896 * Open (and truncate) the file at path, write the contents of buf to it,
1897 * and close it. Dies if any errors are encountered.
1898 */
1899extern void write_file_buf(const char *path, const char *buf, size_t len);
1900
e04d08a4
JK
1901/**
1902 * Like write_file_buf(), but format the contents into a buffer first.
1903 * Additionally, write_file() will append a newline if one is not already
1904 * present, making it convenient to write text files:
1905 *
1906 * write_file(path, "counter: %d", ctr);
1907 */
1908__attribute__((format (printf, 2, 3)))
ef22318c 1909extern void write_file(const char *path, const char *fmt, ...);
2b7ca830 1910
f67b45f8
LT
1911/* pager.c */
1912extern void setup_pager(void);
6e9af863 1913extern int pager_in_use(void);
aa086eb8 1914extern int pager_use_color;
ad6c3739 1915extern int term_columns(void);
d306f3d3 1916extern int decimal_width(uintmax_t);
4914c962 1917extern int check_pager_config(const char *cmd);
3e3a4a41 1918extern void prepare_pager_args(struct child_process *, const char *pager);
f67b45f8 1919
ee9601e6 1920extern const char *editor_program;
d3e7da89 1921extern const char *askpass_program;
dfb068be 1922extern const char *excludes_file;
4d87b9c5 1923
051308f6 1924/* base85 */
f9815772
JM
1925int decode_85(char *dst, const char *line, int linelen);
1926void encode_85(char *buf, const unsigned char *data, int bytes);
051308f6 1927
855419f7 1928/* alloc.c */
100c5f3b
LT
1929extern void *alloc_blob_node(void);
1930extern void *alloc_tree_node(void);
1931extern void *alloc_commit_node(void);
1932extern void *alloc_tag_node(void);
1933extern void *alloc_object_node(void);
855419f7 1934extern void alloc_report(void);
94d5a22c 1935extern unsigned int alloc_commit_index(void);
855419f7 1936
5991a55c 1937/* pkt-line.c */
bbc30f99 1938void packet_trace_identity(const char *prog);
6ce4e61f 1939
b6ec1d61 1940/* add */
7ae02a30
AR
1941/*
1942 * return 0 if success, 1 - if addition of a file failed and
1943 * ADD_FILES_IGNORE_ERRORS was specified in flags
1944 */
610d55af 1945int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags);
b6ec1d61 1946
aecbf914
JH
1947/* diff.c */
1948extern int diff_auto_refresh_index;
1949
68faf689 1950/* match-trees.c */
82db3d44 1951void shift_tree(const struct object_id *, const struct object_id *, struct object_id *, int);
1952void shift_tree_by(const struct object_id *, const struct object_id *, struct object_id *, const char *);
68faf689 1953
a9cc857a
JH
1954/*
1955 * whitespace rules.
1956 * used by both diff and apply
f4b05a49 1957 * last two digits are tab width
a9cc857a 1958 */
f4b05a49
JS
1959#define WS_BLANK_AT_EOL 0100
1960#define WS_SPACE_BEFORE_TAB 0200
1961#define WS_INDENT_WITH_NON_TAB 0400
1962#define WS_CR_AT_EOL 01000
1963#define WS_BLANK_AT_EOF 02000
1964#define WS_TAB_IN_INDENT 04000
aeb84b05 1965#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
f4b05a49
JS
1966#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1967#define WS_TAB_WIDTH_MASK 077
cf1b7869
JH
1968extern unsigned whitespace_rule_cfg;
1969extern unsigned whitespace_rule(const char *);
1970extern unsigned parse_whitespace_rule(const char *);
8f8841e9
JH
1971extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1972extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
c1795bb0 1973extern char *whitespace_error_string(unsigned ws);
d511bd33 1974extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
877f23cc 1975extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
f4b05a49 1976#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
a9cc857a 1977
ee425e46 1978/* ls-files */
ee425e46
JH
1979void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1980
94351118 1981char *alias_lookup(const char *alias);
0989fe96 1982int split_cmdline(char *cmdline, const char ***argv);
ad9ac6db
GB
1983/* Takes a negative value returned by split_cmdline */
1984const char *split_cmdline_strerror(int cmdline_errno);
94351118 1985
46c3cd44 1986/* setup.c */
e37c1329 1987struct startup_info {
a60645f9 1988 int have_repository;
f07d6a1a 1989 const char *prefix;
e37c1329
NTND
1990};
1991extern struct startup_info *startup_info;
1992
db699a8a
NTND
1993/* merge.c */
1994struct commit_list;
1995int try_merge_command(const char *strategy, size_t xopts_nr,
1996 const char **xopts, struct commit_list *common,
1997 const char *head_arg, struct commit_list *remotes);
1998int checkout_fast_forward(const unsigned char *from,
1999 const unsigned char *to,
2000 int overwrite_ignore);
2001
cac42b26 2002
38f865c2
JK
2003int sane_execvp(const char *file, char *const argv[]);
2004
38612532
MH
2005/*
2006 * A struct to encapsulate the concept of whether a file has changed
2007 * since we last checked it. This uses criteria similar to those used
2008 * for the index.
2009 */
2010struct stat_validity {
2011 struct stat_data *sd;
2012};
2013
2014void stat_validity_clear(struct stat_validity *sv);
2015
2016/*
2017 * Returns 1 if the path is a regular file (or a symlink to a regular
2018 * file) and matches the saved stat_validity, 0 otherwise. A missing
2019 * or inaccessible file is considered a match if the struct was just
2020 * initialized, or if the previous update found an inaccessible file.
2021 */
2022int stat_validity_check(struct stat_validity *sv, const char *path);
2023
2024/*
2025 * Update the stat_validity from a file opened at descriptor fd. If
2026 * the file is missing, inaccessible, or not a regular file, then
2027 * future calls to stat_validity_check will match iff one of those
2028 * conditions continues to be true.
2029 */
2030void stat_validity_update(struct stat_validity *sv, int fd);
2031
9ef176b5 2032int versioncmp(const char *s1, const char *s2);
2024d317 2033void sleep_millisec(int millisec);
9ef176b5 2034
eb33876c
DT
2035/*
2036 * Create a directory and (if share is nonzero) adjust its permissions
2037 * according to the shared_repository setting. Only use this for
2038 * directories under $GIT_DIR. Don't use it for working tree
2039 * directories.
2040 */
2041void safe_create_dir(const char *dir, int share);
2042
e83c5163 2043#endif /* CACHE_H */