sha1_file: refactor read_object
[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"
f18f816c 13#include "hash.h"
e83c5163 14
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
5028bf62 69/* The length in byte and in hex digits of the largest possible hash value. */
70#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ
71#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ
72
5f7817c8 73struct object_id {
5028bf62 74 unsigned char hash[GIT_MAX_RAWSZ];
5f7817c8 75};
76
962554c6 77#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
b6829693
ET
78#define DTYPE(de) ((de)->d_type)
79#else
0bdd79af
JH
80#undef DT_UNKNOWN
81#undef DT_DIR
82#undef DT_REG
83#undef DT_LNK
b6829693
ET
84#define DT_UNKNOWN 0
85#define DT_DIR 1
86#define DT_REG 2
a15c1c60 87#define DT_LNK 3
b6829693
ET
88#define DTYPE(de) DT_UNKNOWN
89#endif
90
40689ae1
MK
91/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
92#define S_IFINVALID 0030000
93
9eec4795
LT
94/*
95 * A "directory link" is a link to another git directory.
96 *
97 * The value 0160000 is not normally a valid mode, and
98 * also just happens to be S_IFDIR + S_IFLNK
9eec4795 99 */
302b9282
MW
100#define S_IFGITLINK 0160000
101#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
9eec4795 102
72441af7
KS
103/*
104 * Some mode bits are also used internally for computations.
105 *
106 * They *must* not overlap with any valid modes, and they *must* not be emitted
107 * to outside world - i.e. appear on disk or network. In other words, it's just
108 * temporary fields, which we internally use, but they have to stay in-house.
109 *
110 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git
111 * codebase mode is `unsigned int` which is assumed to be at least 32 bits )
112 */
113
114/* used internally in tree-diff */
115#define S_DIFFTREE_IFXMIN_NEQ 0x80000000
116
117
2386d658
LT
118/*
119 * Intensive research over the course of many years has shown that
120 * port 9418 is totally unused by anything else. Or
121 *
122 * Your search - "port 9418" - did not match any documents.
123 *
124 * as www.google.com puts it.
ba8a4970
LT
125 *
126 * This port has been properly assigned for git use by IANA:
127 * git (Assigned-9418) [I06-050728-0001].
128 *
129 * git 9418/tcp git pack transfer service
130 * git 9418/udp git pack transfer service
131 *
132 * with Linus Torvalds <torvalds@osdl.org> as the point of
133 * contact. September 2005.
134 *
135 * See http://www.iana.org/assignments/port-numbers
2386d658
LT
136 */
137#define DEFAULT_GIT_PORT 9418
138
e83c5163
LT
139/*
140 * Basic data structures for the directory cache
e83c5163
LT
141 */
142
143#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
144struct cache_header {
7800c1eb
TG
145 uint32_t hdr_signature;
146 uint32_t hdr_version;
147 uint32_t hdr_entries;
e83c5163
LT
148};
149
9d227781
JH
150#define INDEX_FORMAT_LB 2
151#define INDEX_FORMAT_UB 4
152
e83c5163
LT
153/*
154 * The "cache_time" is just the low 32 bits of the
155 * time. It doesn't matter if it overflows - we only
156 * check it for equality in the 32 bits we save.
157 */
158struct cache_time {
7800c1eb
TG
159 uint32_t sec;
160 uint32_t nsec;
e83c5163
LT
161};
162
c21d39d7
MH
163struct stat_data {
164 struct cache_time sd_ctime;
165 struct cache_time sd_mtime;
166 unsigned int sd_dev;
167 unsigned int sd_ino;
168 unsigned int sd_uid;
169 unsigned int sd_gid;
170 unsigned int sd_size;
171};
172
e83c5163 173struct cache_entry {
8b013788 174 struct hashmap_entry ent;
c21d39d7 175 struct stat_data ce_stat_data;
ccc4feb5 176 unsigned int ce_mode;
7a51ed66 177 unsigned int ce_flags;
b60e188c 178 unsigned int ce_namelen;
5fc2fc8f 179 unsigned int index; /* for link extension */
99d1a986 180 struct object_id oid;
8f1d2e6f 181 char name[FLEX_ARRAY]; /* more */
e83c5163
LT
182};
183
95fd5bf8 184#define CE_STAGEMASK (0x3000)
16ce2e4c 185#define CE_EXTENDED (0x4000)
5f73076c 186#define CE_VALID (0x8000)
aee46198 187#define CE_STAGESHIFT 12
95fd5bf8 188
06aaaa0b 189/*
ce51bf09 190 * Range 0xFFFF0FFF in ce_flags is divided into
06aaaa0b
NTND
191 * two parts: in-memory flags and on-disk ones.
192 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
193 * if you want to save a new flag, add it in
194 * CE_EXTENDED_FLAGS
195 *
196 * In-memory only flags
197 */
2977ffbb
NTND
198#define CE_UPDATE (1 << 16)
199#define CE_REMOVE (1 << 17)
200#define CE_UPTODATE (1 << 18)
201#define CE_ADDED (1 << 19)
a22c6371 202
2977ffbb 203#define CE_HASHED (1 << 20)
2977ffbb
NTND
204#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
205#define CE_CONFLICTED (1 << 23)
7a51ed66 206
2977ffbb 207#define CE_UNPACKED (1 << 24)
2431afbf 208#define CE_NEW_SKIP_WORKTREE (1 << 25)
da165f47 209
e721c154
NTND
210/* used to temporarily mark paths matched by pathspecs */
211#define CE_MATCHED (1 << 26)
212
078a58e8 213#define CE_UPDATE_IN_BASE (1 << 27)
b3c96fb1 214#define CE_STRIP_NAME (1 << 28)
078a58e8 215
06aaaa0b
NTND
216/*
217 * Extended on-disk flags
218 */
2977ffbb
NTND
219#define CE_INTENT_TO_ADD (1 << 29)
220#define CE_SKIP_WORKTREE (1 << 30)
06aaaa0b 221/* CE_EXTENDED2 is for future extension */
9a93c668 222#define CE_EXTENDED2 (1U << 31)
06aaaa0b 223
44a36913 224#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
06aaaa0b
NTND
225
226/*
227 * Safeguard to avoid saving wrong flags:
228 * - CE_EXTENDED2 won't get saved until its semantic is known
229 * - Bits in 0x0000FFFF have been saved in ce_flags already
230 * - Bits in 0x003F0000 are currently in-memory flags
231 */
232#if CE_EXTENDED_FLAGS & 0x803FFFFF
233#error "CE_EXTENDED_FLAGS out of range"
234#endif
235
3e3a4a41 236/* Forward structure decls */
64acde94 237struct pathspec;
3e3a4a41 238struct child_process;
64acde94 239
eb7a2f1d
LT
240/*
241 * Copy the sha1 and stat state of a cache entry from one to
242 * another. But we never change the name, or the hash state!
243 */
20d142b4
RS
244static inline void copy_cache_entry(struct cache_entry *dst,
245 const struct cache_entry *src)
eb7a2f1d 246{
419a597f 247 unsigned int state = dst->ce_flags & CE_HASHED;
eb7a2f1d
LT
248
249 /* Don't copy hash chain and name */
8b013788
KB
250 memcpy(&dst->ce_stat_data, &src->ce_stat_data,
251 offsetof(struct cache_entry, name) -
252 offsetof(struct cache_entry, ce_stat_data));
eb7a2f1d
LT
253
254 /* Restore the hash state */
419a597f 255 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state;
eb7a2f1d
LT
256}
257
b60e188c 258static inline unsigned create_ce_flags(unsigned stage)
7fec10b7 259{
b60e188c 260 return (stage << CE_STAGESHIFT);
7fec10b7
JH
261}
262
b60e188c 263#define ce_namelen(ce) ((ce)->ce_namelen)
aee46198 264#define ce_size(ce) cache_entry_size(ce_namelen(ce))
7a51ed66 265#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
eadb5831 266#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
44a36913 267#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
eadb5831 268#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
895ff3b2 269#define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD)
aee46198 270
e4479470 271#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
8ae0a8c5
KS
272static inline unsigned int create_ce_mode(unsigned int mode)
273{
8ae0a8c5 274 if (S_ISLNK(mode))
7a51ed66 275 return S_IFLNK;
302b9282 276 if (S_ISDIR(mode) || S_ISGITLINK(mode))
7a51ed66
LT
277 return S_IFGITLINK;
278 return S_IFREG | ce_permissions(mode);
8ae0a8c5 279}
20d142b4
RS
280static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce,
281 unsigned int mode)
185c975f 282{
78a8d641
JS
283 extern int trust_executable_bit, has_symlinks;
284 if (!has_symlinks && S_ISREG(mode) &&
7a51ed66 285 ce && S_ISLNK(ce->ce_mode))
78a8d641 286 return ce->ce_mode;
185c975f 287 if (!trust_executable_bit && S_ISREG(mode)) {
7a51ed66 288 if (ce && S_ISREG(ce->ce_mode))
185c975f
JH
289 return ce->ce_mode;
290 return create_ce_mode(0666);
291 }
292 return create_ce_mode(mode);
293}
d6b8fc30
JH
294static inline int ce_to_dtype(const struct cache_entry *ce)
295{
296 unsigned ce_mode = ntohl(ce->ce_mode);
297 if (S_ISREG(ce_mode))
298 return DT_REG;
299 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
300 return DT_DIR;
301 else if (S_ISLNK(ce_mode))
302 return DT_LNK;
303 else
304 return DT_UNKNOWN;
305}
b90d9b88
RS
306static inline unsigned int canon_mode(unsigned int mode)
307{
308 if (S_ISREG(mode))
309 return S_IFREG | ce_permissions(mode);
310 if (S_ISLNK(mode))
311 return S_IFLNK;
312 if (S_ISDIR(mode))
313 return S_IFDIR;
314 return S_IFGITLINK;
315}
e4479470 316
ee7825b5 317#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
f5cabd13 318
e636a7b4
NTND
319#define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */
320#define CE_ENTRY_CHANGED (1 << 1)
321#define CE_ENTRY_REMOVED (1 << 2)
322#define CE_ENTRY_ADDED (1 << 3)
6c306a34 323#define RESOLVE_UNDO_CHANGED (1 << 4)
a5400efe 324#define CACHE_TREE_CHANGED (1 << 5)
c18b80a0 325#define SPLIT_INDEX_ORDERED (1 << 6)
1bbb3dba 326#define UNTRACKED_CHANGED (1 << 7)
e636a7b4 327
5fc2fc8f 328struct split_index;
83c094ad
NTND
329struct untracked_cache;
330
228e94f9
JH
331struct index_state {
332 struct cache_entry **cache;
9d227781 333 unsigned int version;
228e94f9 334 unsigned int cache_nr, cache_alloc, cache_changed;
cfc5789a 335 struct string_list *resolve_undo;
228e94f9 336 struct cache_tree *cache_tree;
5fc2fc8f 337 struct split_index *split_index;
fba2f38a 338 struct cache_time timestamp;
913e0e99
JH
339 unsigned name_hash_initialized : 1,
340 initialized : 1;
8b013788 341 struct hashmap name_hash;
e05881a4 342 struct hashmap dir_hash;
426ddeea 343 unsigned char sha1[20];
83c094ad 344 struct untracked_cache *untracked;
228e94f9
JH
345};
346
347extern struct index_state the_index;
348
96872bc2 349/* Name hashing */
ea194895 350extern int test_lazy_init_name_hash(struct index_state *istate, int try_threaded);
96872bc2 351extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
2092678c
KB
352extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
353extern void free_name_hash(struct index_state *istate);
96872bc2
LT
354
355
4aab5b46 356#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
228e94f9
JH
357#define active_cache (the_index.cache)
358#define active_nr (the_index.cache_nr)
359#define active_alloc (the_index.cache_alloc)
360#define active_cache_changed (the_index.cache_changed)
361#define active_cache_tree (the_index.cache_tree)
e83c5163 362
4aab5b46
JH
363#define read_cache() read_index(&the_index)
364#define read_cache_from(path) read_index_from(&the_index, (path))
671c9b7e 365#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
fa7b3c2f 366#define is_cache_unborn() is_index_unborn(&the_index)
e46bbcf6 367#define read_cache_unmerged() read_index_unmerged(&the_index)
4aab5b46 368#define discard_cache() discard_index(&the_index)
94a5728c 369#define unmerged_cache() unmerged_index(&the_index)
4aab5b46
JH
370#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
371#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
81dc2307 372#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
4aab5b46
JH
373#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
374#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
610d55af
TG
375#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
376#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
d9d70966 377#define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip))
3deffc52 378#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
4bd5b7da
JH
379#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
380#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
db5360f3
ES
381#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen))
382#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase))
98fa4738 383#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
cfc5789a 384#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
8aa38563 385#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
4421a823 386#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
ff366825 387#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz))
4aab5b46 388#endif
e83c5163 389
edaec3fb
JH
390enum object_type {
391 OBJ_BAD = -1,
392 OBJ_NONE = 0,
393 OBJ_COMMIT = 1,
394 OBJ_TREE = 2,
395 OBJ_BLOB = 3,
396 OBJ_TAG = 4,
397 /* 5 for future expansion */
398 OBJ_OFS_DELTA = 6,
399 OBJ_REF_DELTA = 7,
355885d5 400 OBJ_ANY,
4b05548f 401 OBJ_MAX
edaec3fb
JH
402};
403
b45563a2
JH
404static inline enum object_type object_type(unsigned int mode)
405{
406 return S_ISDIR(mode) ? OBJ_TREE :
407 S_ISGITLINK(mode) ? OBJ_COMMIT :
408 OBJ_BLOB;
409}
410
2163e5db 411/* Double-check local_repo_env below if you add to this list. */
8ac069ac 412#define GIT_DIR_ENVIRONMENT "GIT_DIR"
c7b3a3d2 413#define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR"
a1bea2c1 414#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
892c41b9 415#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
a6f7f9a3 416#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
74866d75 417#define GIT_SUPER_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUPER_PREFIX"
b58a68c1 418#define GIT_TOPLEVEL_PREFIX_ENVIRONMENT "GIT_INTERNAL_TOPLEVEL_PREFIX"
8ac069ac 419#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
d19938ab 420#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
bb233d69 421#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
5da5c8f4 422#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
069c0532 423#define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE"
d4ebc36c
JH
424#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
425#define CONFIG_ENVIRONMENT "GIT_CONFIG"
2b64fc89 426#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
d4ebc36c 427#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
0454dd93 428#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
6476b38b 429#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
58d121b2 430#define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE"
d0bfd026
JH
431#define GITATTRIBUTES_FILE ".gitattributes"
432#define INFOATTRIBUTES_FILE "info/attributes"
f48fd688 433#define ATTRIBUTE_MACRO_PREFIX "[attr]"
a97a7468
JS
434#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
435#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
894a9d33 436#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
6956f858
TR
437#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
438#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
823ab40f 439#define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS"
bd30c2e4
NTND
440#define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS"
441#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS"
93d93537 442#define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS"
e34c2e01 443#define GIT_QUARANTINE_ENVIRONMENT "GIT_QUARANTINE_PATH"
bb233d69 444
48a7c1c4 445/*
2cd83d10
JK
446 * This environment variable is expected to contain a boolean indicating
447 * whether we should or should not treat:
448 *
449 * GIT_DIR=foo.git git ...
450 *
451 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use
452 * of this, but we use it internally to communicate to sub-processes that we
453 * are in a bare repo. If not set, defaults to true.
454 */
455#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
456
48a7c1c4 457/*
2163e5db
JK
458 * Repository-local GIT_* environment variables; these will be cleared
459 * when git spawns a sub-process that runs inside another repository.
460 * The array is NULL-terminated, which makes it easy to pass in the "env"
461 * parameter of a run-command invocation, or to do a simple walk.
48a7c1c4 462 */
2163e5db 463extern const char * const local_repo_env[];
48a7c1c4 464
b9605bc4
JK
465/*
466 * Returns true iff we have a configured git repository (either via
467 * setup_git_directory, or in the environment via $GIT_DIR).
468 */
469int have_git_dir(void);
470
7d1864ce
JH
471extern int is_bare_repository_cfg;
472extern int is_bare_repository(void);
68025633 473extern int is_inside_git_dir(void);
e90fdc39 474extern char *git_work_tree_cfg;
892c41b9 475extern int is_inside_work_tree(void);
c5fba16c 476extern const char *get_git_dir(void);
c7b3a3d2 477extern const char *get_git_common_dir(void);
8ac069ac
JH
478extern char *get_object_directory(void);
479extern char *get_index_file(void);
5da5c8f4 480extern char *get_graft_file(void);
d7ac12b2 481extern int set_git_dir(const char *path);
11f9dd71 482extern int get_common_dir_noenv(struct strbuf *sb, const char *gitdir);
31e26ebc 483extern int get_common_dir(struct strbuf *sb, const char *gitdir);
a1bea2c1
JT
484extern const char *get_git_namespace(void);
485extern const char *strip_namespace(const char *namespaced_ref);
74866d75 486extern const char *get_super_prefix(void);
e90fdc39 487extern const char *get_git_work_tree(void);
a93bedad 488
ffd036b1
JK
489/*
490 * Return true if the given path is a git directory; note that this _just_
491 * looks at the directory itself. If you want to know whether "foo/.git"
492 * is a repository, you must feed that path, not just "foo".
493 */
494extern int is_git_directory(const char *path);
495
496/*
497 * Return 1 if the given path is the root of a git repository or
498 * submodule, else 0. Will not return 1 for bare repositories with the
499 * exception of creating a bare repository in "foo/.git" and calling
500 * is_git_repository("foo").
501 *
502 * If we run into read errors, we err on the side of saying "yes, it is",
503 * as we usually consider sub-repos precious, and would prefer to err on the
504 * side of not disrupting or deleting them.
505 */
506extern int is_nonbare_repository_dir(struct strbuf *path);
507
a93bedad
EE
508#define READ_GITFILE_ERR_STAT_FAILED 1
509#define READ_GITFILE_ERR_NOT_A_FILE 2
510#define READ_GITFILE_ERR_OPEN_FAILED 3
511#define READ_GITFILE_ERR_READ_FAILED 4
512#define READ_GITFILE_ERR_INVALID_FORMAT 5
513#define READ_GITFILE_ERR_NO_PATH 6
514#define READ_GITFILE_ERR_NOT_A_REPO 7
921bdd96 515#define READ_GITFILE_ERR_TOO_LARGE 8
5f29433f 516extern void read_gitfile_error_die(int error_code, const char *path, const char *dir);
a93bedad
EE
517extern const char *read_gitfile_gently(const char *path, int *return_error_code);
518#define read_gitfile(path) read_gitfile_gently((path), NULL)
40d96325
SB
519extern const char *resolve_gitdir_gently(const char *suspect, int *return_error_code);
520#define resolve_gitdir(path) resolve_gitdir_gently((path), NULL)
521
19757d80 522extern void set_git_work_tree(const char *tree);
8ac069ac
JH
523
524#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
bb233d69 525
59f0f2f3 526extern void setup_work_tree(void);
16ac8b8d
JS
527/*
528 * Find GIT_DIR of the repository that contains the current working directory,
529 * without changing the working directory or other global state. The result is
530 * appended to gitdir. The return value is either NULL if no repository was
531 * found, or pointing to the path inside gitdir's buffer.
532 */
533extern const char *discover_git_directory(struct strbuf *gitdir);
4ca06608 534extern const char *setup_git_directory_gently(int *);
d288a700 535extern const char *setup_git_directory(void);
edc54fb5 536extern char *prefix_path(const char *prefix, int len, const char *path);
645a29c4 537extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path);
59801976
JK
538
539/*
540 * Concatenate "prefix" (if len is non-zero) and "path", with no
541 * connecting characters (so "prefix" should end with a "/").
542 * Unlike prefix_path, this should be used if the named file does
543 * not have to interact with index entry; i.e. name of a random file
544 * on the filesystem.
545 *
e4da43b1
JK
546 * The return value is always a newly allocated string (even if the
547 * prefix was empty).
59801976 548 */
e4da43b1 549extern char *prefix_filename(const char *prefix, const char *path);
59801976 550
c6e8c800 551extern int check_filename(const char *prefix, const char *name);
023e37c3
MM
552extern void verify_filename(const char *prefix,
553 const char *name,
554 int diagnose_misspelt_rev);
ea92f41f 555extern void verify_non_filename(const char *prefix, const char *name);
546e0fd9 556extern int path_inside_repo(const char *prefix, const char *path);
d288a700 557
f225aeb2 558#define INIT_DB_QUIET 0x0001
33158701 559#define INIT_DB_EXIST_OK 0x0002
f225aeb2 560
33158701
NTND
561extern int init_db(const char *git_dir, const char *real_git_dir,
562 const char *template_dir, unsigned int flags);
f225aeb2 563
1d999ddd 564extern void sanitize_stdfds(void);
de0957ce 565extern int daemonize(void);
1d999ddd 566
e83c5163
LT
567#define alloc_nr(x) (((x)+16)*3/2)
568
6815e569
JK
569/*
570 * Realloc the buffer pointed at by variable 'x' so that it can hold
571 * at least 'nr' entries; the number of entries currently allocated
572 * is 'alloc', using the standard growing factor alloc_nr() macro.
573 *
01f6fd4b 574 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
6815e569
JK
575 */
576#define ALLOC_GROW(x, nr, alloc) \
577 do { \
c927e6c6 578 if ((nr) > alloc) { \
4234a761
JH
579 if (alloc_nr(alloc) < (nr)) \
580 alloc = (nr); \
581 else \
582 alloc = alloc_nr(alloc); \
2756ca43 583 REALLOC_ARRAY(x, alloc); \
6815e569 584 } \
98746061 585 } while (0)
6815e569 586
734aab75 587/* Initialize and use the cache information */
03b86647 588struct lock_file;
4aab5b46 589extern int read_index(struct index_state *);
5ab2a2da 590extern int read_index_preload(struct index_state *, const struct pathspec *pathspec);
3e52f70b
NTND
591extern int do_read_index(struct index_state *istate, const char *path,
592 int must_exist); /* for testting only! */
4aab5b46 593extern int read_index_from(struct index_state *, const char *path);
fa7b3c2f 594extern int is_index_unborn(struct index_state *);
e46bbcf6 595extern int read_index_unmerged(struct index_state *);
03b86647
NTND
596#define COMMIT_LOCK (1 << 0)
597#define CLOSE_LOCK (1 << 1)
598extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
4aab5b46 599extern int discard_index(struct index_state *);
edf3b905 600extern void move_index_extensions(struct index_state *dst, struct index_state *src);
d1f128b0 601extern int unmerged_index(const struct index_state *);
8dcf39c4 602extern int verify_path(const char *path);
a6db3fbb 603extern int strcmp_offset(const char *s1, const char *s2, size_t *first_change);
41284eb0
DT
604extern int index_dir_exists(struct index_state *istate, const char *name, int namelen);
605extern void adjust_dirname_case(struct index_state *istate, char *name);
db5360f3 606extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
12733e9d
SB
607
608/*
609 * Searches for an entry defined by name and namelen in the given index.
610 * If the return value is positive (including 0) it is the position of an
611 * exact match. If the return value is negative, the negated value minus 1
612 * is the position where the entry would be inserted.
613 * Example: The current index consists of these files and its stages:
614 *
615 * b#0, d#0, f#1, f#3
616 *
617 * index_name_pos(&index, "a", 1) -> -1
618 * index_name_pos(&index, "b", 1) -> 0
619 * index_name_pos(&index, "c", 1) -> -2
620 * index_name_pos(&index, "d", 1) -> 1
621 * index_name_pos(&index, "e", 1) -> -3
622 * index_name_pos(&index, "f", 1) -> -3
623 * index_name_pos(&index, "g", 1) -> -5
624 */
d1f128b0 625extern int index_name_pos(const struct index_state *, const char *name, int namelen);
12733e9d 626
192268c1
JH
627#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
628#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
b155725d 629#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
af3785dc 630#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
39425819 631#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
ce7c614b 632#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */
4aab5b46 633extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
81dc2307 634extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
3bd72adf
SB
635
636/* Remove entry, return true if there are more entries to go. */
4aab5b46 637extern int remove_index_entry_at(struct index_state *, int pos);
3bd72adf 638
36419c8e 639extern void remove_marked_cache_entries(struct index_state *istate);
4aab5b46 640extern int remove_file_from_index(struct index_state *, const char *path);
38ed1d89
JH
641#define ADD_CACHE_VERBOSE 1
642#define ADD_CACHE_PRETEND 2
01665924 643#define ADD_CACHE_IGNORE_ERRORS 4
041aee31 644#define ADD_CACHE_IGNORE_REMOVAL 8
39425819 645#define ADD_CACHE_INTENT 16
20cf41d0
SB
646/*
647 * These two are used to add the contents of the file at path
648 * to the index, marking the working tree up-to-date by storing
649 * the cached stat info in the resulting cache entry. A caller
650 * that has already run lstat(2) on the path can call
651 * add_to_index(), and all others can call add_file_to_index();
652 * the latter will do necessary lstat(2) internally before
653 * calling the former.
654 */
610d55af
TG
655extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
656extern int add_file_to_index(struct index_state *, const char *path, int flags);
20cf41d0 657
25762726 658extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options);
d9d70966 659extern int chmod_index_entry(struct index_state *, struct cache_entry *ce, char flip);
9c5e6c80 660extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b);
b4b313f9 661extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce);
98fa4738 662extern int index_name_is_other(const struct index_state *, const char *, int);
87542508 663extern void *read_blob_data_from_index(const struct index_state *, const char *, unsigned long *);
4bd5b7da
JH
664
665/* do stat comparison even if CE_VALID is true */
666#define CE_MATCH_IGNORE_VALID 01
667/* do not check the contents but report dirty on racily-clean entries */
56cac48c
NTND
668#define CE_MATCH_RACY_IS_DIRTY 02
669/* do stat comparison even if CE_SKIP_WORKTREE is true */
670#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
2e2e7ec1
BK
671/* ignore non-existent files during stat update */
672#define CE_MATCH_IGNORE_MISSING 0x08
25762726
BK
673/* enable stat refresh */
674#define CE_MATCH_REFRESH 0x10
21a6b9fa
RS
675extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
676extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
4bd5b7da 677
c4ce46fc
JH
678#define HASH_WRITE_OBJECT 1
679#define HASH_FORMAT_CHECK 2
680extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
681extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
c21d39d7
MH
682
683/*
684 * Record to sd the data from st that we use to check whether a file
685 * might have changed.
686 */
687extern void fill_stat_data(struct stat_data *sd, struct stat *st);
688
689/*
690 * Return 0 if st is consistent with a file not having been changed
691 * since sd was filled. If there are differences, return a
692 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
693 * INODE_CHANGED, and DATA_CHANGED.
694 */
695extern int match_stat_data(const struct stat_data *sd, struct stat *st);
ed4efab1
NTND
696extern int match_stat_data_racy(const struct index_state *istate,
697 const struct stat_data *sd, struct stat *st);
c21d39d7 698
415e96c8
JH
699extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
700
405e5b2f
LT
701#define REFRESH_REALLY 0x0001 /* ignore_valid */
702#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
703#define REFRESH_QUIET 0x0004 /* be quiet about it */
704#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
3f1b7b60 705#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
43673fdd 706#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
9b2d6149 707extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
1335d76e 708extern struct cache_entry *refresh_cache_entry(struct cache_entry *, unsigned int);
405e5b2f 709
ccdc4ec3 710extern void update_index_if_able(struct index_state *, struct lock_file *);
30ca07a2
JH
711
712extern int hold_locked_index(struct lock_file *, int);
5e7f56ac 713extern void set_alternate_index_output(const char *);
697cc8ef 714
a33fc72f
JH
715extern int verify_index_checksum;
716
2ae1c53b 717/* Environment bits from configuration mechanism */
17712991 718extern int trust_executable_bit;
1ce4790b 719extern int trust_ctime;
c08e4d5b 720extern int check_stat;
9378c161 721extern int quote_path_fully;
78a8d641 722extern int has_symlinks;
dce96489 723extern int minimum_abbrev, default_abbrev;
0a9b88b7 724extern int ignore_case;
5f73076c 725extern int assume_unchanged;
9f0bb90d 726extern int prefer_symlink_refs;
2f8acdb3 727extern int warn_ambiguous_refs;
25fba78d 728extern int warn_on_object_refname_ambiguity;
2ae1c53b 729extern const char *apply_default_whitespace;
86c91f91 730extern const char *apply_default_ignorewhitespace;
64589a03 731extern const char *git_attributes_file;
867ad08a 732extern const char *git_hooks_path;
12f6c308 733extern int zlib_compression_level;
960ccca6 734extern int core_compression_level;
8de7eeb5 735extern int pack_compression_level;
60bb8b14 736extern size_t packed_git_window_size;
77ccc5bb 737extern size_t packed_git_limit;
18bdec11 738extern size_t delta_base_cache_limit;
15366280 739extern unsigned long big_file_threshold;
568508e7 740extern unsigned long pack_size_limit_cfg;
afc711b8 741
4543926b
JK
742/*
743 * Accessors for the core.sharedrepository config which lazy-load the value
744 * from the config (if not already set). The "reset" function can be
745 * used to unset "set" or cached value, meaning that the value will be loaded
746 * fresh from the config file on the next call to get_shared_repository().
747 */
7875acb6
JK
748void set_shared_repository(int value);
749int get_shared_repository(void);
4543926b 750void reset_shared_repository(void);
7875acb6 751
afc711b8
MH
752/*
753 * Do replace refs need to be checked this run? This variable is
754 * initialized to true unless --no-replace-object is used or
755 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some
756 * commands that do not want replace references to be active. As an
757 * optimization it is also set to false if replace references have
758 * been sought but there were none.
759 */
760extern int check_replace_refs;
58d121b2 761extern char *git_replace_ref_base;
afc711b8 762
aafe9fba 763extern int fsync_object_files;
671c9b7e 764extern int core_preload_index;
08aefc9e 765extern int core_apply_sparse_checkout;
76759c7d 766extern int precomposed_unicode;
a42643aa 767extern int protect_hfs;
2b4c6efc 768extern int protect_ntfs;
c7b3a3d2 769extern int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
17712991 770
49672f26
JK
771/*
772 * Include broken refs in all ref iterations, which will
773 * generally choke dangerous operations rather than letting
774 * them silently proceed without taking the broken ref into
775 * account.
776 */
777extern int ref_paranoia;
778
eff80a9f
JH
779/*
780 * The character that begins a commented line in user-editable file
781 * that is subject to stripspace.
782 */
783extern char comment_line_char;
84c9dc2c 784extern int auto_comment_line_char;
eff80a9f 785
f30afdab
JS
786/* Windows only */
787enum hide_dotfiles_type {
788 HIDE_DOTFILES_FALSE = 0,
789 HIDE_DOTFILES_TRUE,
790 HIDE_DOTFILES_DOTGITONLY
791};
792extern enum hide_dotfiles_type hide_dotfiles;
793
341fb286
CW
794enum log_refs_config {
795 LOG_REFS_UNSET = -1,
796 LOG_REFS_NONE = 0,
797 LOG_REFS_NORMAL,
798 LOG_REFS_ALWAYS
799};
800extern enum log_refs_config log_all_ref_updates;
801
9ed36cfa 802enum branch_track {
9188ed89 803 BRANCH_TRACK_UNSPECIFIED = -1,
9ed36cfa
JS
804 BRANCH_TRACK_NEVER = 0,
805 BRANCH_TRACK_REMOTE,
806 BRANCH_TRACK_ALWAYS,
807 BRANCH_TRACK_EXPLICIT,
4b05548f 808 BRANCH_TRACK_OVERRIDE
9ed36cfa
JS
809};
810
c998ae9b
DS
811enum rebase_setup_type {
812 AUTOREBASE_NEVER = 0,
813 AUTOREBASE_LOCAL,
814 AUTOREBASE_REMOTE,
4b05548f 815 AUTOREBASE_ALWAYS
c998ae9b
DS
816};
817
52153747 818enum push_default_type {
52153747
FAG
819 PUSH_DEFAULT_NOTHING = 0,
820 PUSH_DEFAULT_MATCHING,
b55e6775 821 PUSH_DEFAULT_SIMPLE,
53c40311 822 PUSH_DEFAULT_UPSTREAM,
f25950f3
CT
823 PUSH_DEFAULT_CURRENT,
824 PUSH_DEFAULT_UNSPECIFIED
52153747
FAG
825};
826
9ed36cfa 827extern enum branch_track git_branch_track;
c998ae9b 828extern enum rebase_setup_type autorebase;
52153747 829extern enum push_default_type push_default;
9ed36cfa 830
348df166
JS
831enum object_creation_mode {
832 OBJECT_CREATION_USES_HARDLINKS = 0,
4b05548f 833 OBJECT_CREATION_USES_RENAMES = 1
348df166
JS
834};
835
836extern enum object_creation_mode object_creation_mode;
be66a6c4 837
a97a7468
JS
838extern char *notes_ref_name;
839
7f3140cd
JS
840extern int grafts_replace_parents;
841
00a09d57
JK
842/*
843 * GIT_REPO_VERSION is the version we write by default. The
844 * _READ variant is the highest number we know how to
845 * handle.
846 */
ab9cb76f 847#define GIT_REPO_VERSION 0
00a09d57 848#define GIT_REPO_VERSION_READ 1
067fbd41 849extern int repository_format_precious_objects;
4b0d1eeb 850
2cc7c2c7
JK
851struct repository_format {
852 int version;
853 int precious_objects;
854 int is_bare;
855 char *work_tree;
856 struct string_list unknown_extensions;
857};
858
859/*
860 * Read the repository format characteristics from the config file "path" into
861 * "format" struct. Returns the numeric version. On error, -1 is returned,
862 * format->version is set to -1, and all other fields in the struct are
863 * undefined.
864 */
865int read_repository_format(struct repository_format *format, const char *path);
866
867/*
868 * Verify that the repository described by repository_format is something we
869 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe
870 * any errors encountered.
871 */
872int verify_repository_format(const struct repository_format *format,
873 struct strbuf *err);
874
4b0d1eeb
JK
875/*
876 * Check the repository format version in the path found in get_git_dir(),
877 * and die if it is a version we don't understand. Generally one would
878 * set_git_dir() before calling this, and use it only for "are we in a valid
879 * repo?".
880 */
881extern void check_repository_format(void);
ab9cb76f 882
734aab75
LT
883#define MTIME_CHANGED 0x0001
884#define CTIME_CHANGED 0x0002
885#define OWNER_CHANGED 0x0004
886#define MODE_CHANGED 0x0008
887#define INODE_CHANGED 0x0010
888#define DATA_CHANGED 0x0020
8ae0a8c5 889#define TYPE_CHANGED 0x0040
e83c5163 890
69ddd231
JK
891/*
892 * Return a statically allocated filename, either generically (mkpath), in
893 * the repository directory (git_path), or in a submodule's repository
894 * directory (git_path_submodule). In all cases, note that the result
895 * may be overwritten by another call to _any_ of the functions. Consider
07e3070d
JK
896 * using the safer "dup" or "strbuf" formats below (in some cases, the
897 * unsafe versions have already been removed).
69ddd231
JK
898 */
899extern const char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
900extern const char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
15cdfea7 901extern const char *git_common_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
69ddd231 902
108bebea
AR
903extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
904 __attribute__((format (printf, 3, 4)));
1a83c240
NTND
905extern void strbuf_git_path(struct strbuf *sb, const char *fmt, ...)
906 __attribute__((format (printf, 2, 3)));
15cdfea7
NTND
907extern void strbuf_git_common_path(struct strbuf *sb, const char *fmt, ...)
908 __attribute__((format (printf, 2, 3)));
bb3788ce
JK
909extern char *git_path_buf(struct strbuf *buf, const char *fmt, ...)
910 __attribute__((format (printf, 2, 3)));
99b43a61
JK
911extern int strbuf_git_path_submodule(struct strbuf *sb, const char *path,
912 const char *fmt, ...)
f5895fd3 913 __attribute__((format (printf, 3, 4)));
aba13e7c
AR
914extern char *git_pathdup(const char *fmt, ...)
915 __attribute__((format (printf, 1, 2)));
21cf3227
HKNN
916extern char *mkpathdup(const char *fmt, ...)
917 __attribute__((format (printf, 1, 2)));
f5895fd3 918extern char *git_pathdup_submodule(const char *path, const char *fmt, ...)
0bad611b 919 __attribute__((format (printf, 2, 3)));
108bebea 920
77a6d840 921extern void report_linked_checkout_garbage(void);
0bad611b 922
f932729c
JK
923/*
924 * You can define a static memoized git path like:
925 *
926 * static GIT_PATH_FUNC(git_path_foo, "FOO");
927 *
928 * or use one of the global ones below.
929 */
930#define GIT_PATH_FUNC(func, filename) \
931 const char *func(void) \
932 { \
933 static char *ret; \
934 if (!ret) \
935 ret = git_pathdup(filename); \
936 return ret; \
937 }
938
939const char *git_path_cherry_pick_head(void);
940const char *git_path_revert_head(void);
941const char *git_path_squash_msg(void);
942const char *git_path_merge_msg(void);
943const char *git_path_merge_rr(void);
944const char *git_path_merge_mode(void);
945const char *git_path_merge_head(void);
946const char *git_path_fetch_head(void);
947const char *git_path_shallow(void);
948
d40d535b
MH
949/*
950 * Return the name of the file in the local object database that would
951 * be used to store a loose object with the specified sha1. The
952 * return value is a pointer to a statically allocated buffer that is
953 * overwritten each time the function is called.
954 */
30d6c6ea 955extern const char *sha1_file_name(const unsigned char *sha1);
d40d535b
MH
956
957/*
958 * Return the name of the (local) packfile with the specified sha1 in
959 * its name. The return value is a pointer to memory that is
960 * overwritten each time this function is called.
961 */
bf592c50 962extern char *sha1_pack_name(const unsigned char *sha1);
d40d535b
MH
963
964/*
965 * Return the name of the (local) pack index file with the specified
966 * sha1 in its name. The return value is a pointer to memory that is
967 * overwritten each time this function is called.
968 */
bf592c50 969extern char *sha1_pack_index_name(const unsigned char *sha1);
d40d535b 970
af49c6d0
JK
971/*
972 * Return an abbreviated sha1 unique within this repository's object database.
973 * The result will be at least `len` characters long, and will be NUL
974 * terminated.
975 *
ef2ed501
JK
976 * The non-`_r` version returns a static buffer which remains valid until 4
977 * more calls to find_unique_abbrev are made.
af49c6d0
JK
978 *
979 * The `_r` variant writes to a buffer supplied by the caller, which must be at
980 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes
981 * written (excluding the NUL terminator).
982 *
983 * Note that while this version avoids the static buffer, it is not fully
984 * reentrant, as it calls into other non-reentrant git code.
985 */
986extern const char *find_unique_abbrev(const unsigned char *sha1, int len);
987extern int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len);
988
cd02599c 989extern const unsigned char null_sha1[GIT_MAX_RAWSZ];
3e56e724 990extern const struct object_id null_oid;
1a812f3a
IM
991
992static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
0bef57ee 993{
1a812f3a
IM
994 int i;
995
aa1c6fdf 996 for (i = 0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) {
1a812f3a
IM
997 if (*sha1 != *sha2)
998 return *sha1 - *sha2;
999 }
1000
1001 return 0;
0bef57ee 1002}
1a812f3a 1003
aa1c6fdf 1004static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2)
1005{
1006 return hashcmp(oid1->hash, oid2->hash);
1007}
1008
1a812f3a 1009static inline int is_null_sha1(const unsigned char *sha1)
a89fccd2 1010{
1a812f3a 1011 return !hashcmp(sha1, null_sha1);
a89fccd2 1012}
1a812f3a 1013
aa1c6fdf 1014static inline int is_null_oid(const struct object_id *oid)
1015{
1016 return !hashcmp(oid->hash, null_sha1);
1017}
1018
e702496e
SP
1019static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
1020{
aa1c6fdf 1021 memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ);
e702496e 1022}
aa1c6fdf 1023
1024static inline void oidcpy(struct object_id *dst, const struct object_id *src)
1025{
1026 hashcpy(dst->hash, src->hash);
e702496e 1027}
aa1c6fdf 1028
a8e0d16d
JH
1029static inline void hashclr(unsigned char *hash)
1030{
aa1c6fdf 1031 memset(hash, 0, GIT_SHA1_RAWSZ);
a8e0d16d 1032}
e83c5163 1033
aa1c6fdf 1034static inline void oidclr(struct object_id *oid)
1035{
1036 hashclr(oid->hash);
1037}
1038
1039
14d9c578
JK
1040#define EMPTY_TREE_SHA1_HEX \
1041 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
dab0d410 1042#define EMPTY_TREE_SHA1_BIN_LITERAL \
14d9c578
JK
1043 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
1044 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
8576fde6
JK
1045extern const struct object_id empty_tree_oid;
1046#define EMPTY_TREE_SHA1_BIN (empty_tree_oid.hash)
14d9c578 1047
f8582cad
JK
1048#define EMPTY_BLOB_SHA1_HEX \
1049 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
1050#define EMPTY_BLOB_SHA1_BIN_LITERAL \
1051 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
1052 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
8576fde6
JK
1053extern const struct object_id empty_blob_oid;
1054#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash)
1055
f8582cad
JK
1056
1057static inline int is_empty_blob_sha1(const unsigned char *sha1)
1058{
1059 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
1060}
1061
8576fde6
JK
1062static inline int is_empty_blob_oid(const struct object_id *oid)
1063{
1064 return !hashcmp(oid->hash, EMPTY_BLOB_SHA1_BIN);
1065}
1066
1067static inline int is_empty_tree_sha1(const unsigned char *sha1)
1068{
1069 return !hashcmp(sha1, EMPTY_TREE_SHA1_BIN);
1070}
1071
1072static inline int is_empty_tree_oid(const struct object_id *oid)
1073{
1074 return !hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN);
1075}
1076
b862b61c
MM
1077/* set default permissions by passing mode arguments to open(2) */
1078int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
1079int git_mkstemp_mode(char *pattern, int mode);
1080
06cbe855
HO
1081/*
1082 * NOTE NOTE NOTE!!
1083 *
1084 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
1085 * not be changed. Old repositories have core.sharedrepository written in
1086 * numeric format, and therefore these values are preserved for compatibility
1087 * reasons.
1088 */
94df2506 1089enum sharedrepo {
06cbe855
HO
1090 PERM_UMASK = 0,
1091 OLD_PERM_GROUP = 1,
1092 OLD_PERM_EVERYBODY = 2,
1093 PERM_GROUP = 0660,
4b05548f 1094 PERM_EVERYBODY = 0664
94df2506
JH
1095};
1096int git_config_perm(const char *var, const char *value);
3a429d3b 1097int adjust_shared_perm(const char *path);
0be0521b
MH
1098
1099/*
1100 * Create the directory containing the named path, using care to be
204a047f
MH
1101 * somewhat safe against races. Return one of the scld_error values to
1102 * indicate success/failure. On error, set errno to describe the
1103 * problem.
18d37e86
MH
1104 *
1105 * SCLD_VANISHED indicates that one of the ancestor directories of the
1106 * path existed at one point during the function call and then
1107 * suddenly vanished, probably because another process pruned the
1108 * directory while we were working. To be robust against this kind of
1109 * race, callers might want to try invoking the function again when it
1110 * returns SCLD_VANISHED.
e95792e5
MH
1111 *
1112 * safe_create_leading_directories() temporarily changes path while it
1113 * is working but restores it before returning.
1114 * safe_create_leading_directories_const() doesn't modify path, even
1115 * temporarily.
0be0521b
MH
1116 */
1117enum scld_error {
1118 SCLD_OK = 0,
1119 SCLD_FAILED = -1,
1120 SCLD_PERMS = -2,
18d37e86
MH
1121 SCLD_EXISTS = -3,
1122 SCLD_VANISHED = -4
0be0521b
MH
1123};
1124enum scld_error safe_create_leading_directories(char *path);
1125enum scld_error safe_create_leading_directories_const(const char *path);
1126
177978f5
MH
1127/*
1128 * Callback function for raceproof_create_file(). This function is
1129 * expected to do something that makes dirname(path) permanent despite
1130 * the fact that other processes might be cleaning up empty
1131 * directories at the same time. Usually it will create a file named
1132 * path, but alternatively it could create another file in that
1133 * directory, or even chdir() into that directory. The function should
1134 * return 0 if the action was completed successfully. On error, it
1135 * should return a nonzero result and set errno.
1136 * raceproof_create_file() treats two errno values specially:
1137 *
1138 * - ENOENT -- dirname(path) does not exist. In this case,
1139 * raceproof_create_file() tries creating dirname(path)
1140 * (and any parent directories, if necessary) and calls
1141 * the function again.
1142 *
1143 * - EISDIR -- the file already exists and is a directory. In this
1144 * case, raceproof_create_file() removes the directory if
1145 * it is empty (and recursively any empty directories that
1146 * it contains) and calls the function again.
1147 *
1148 * Any other errno causes raceproof_create_file() to fail with the
1149 * callback's return value and errno.
1150 *
1151 * Obviously, this function should be OK with being called again if it
1152 * fails with ENOENT or EISDIR. In other scenarios it will not be
1153 * called again.
1154 */
1155typedef int create_file_fn(const char *path, void *cb);
1156
1157/*
1158 * Create a file in dirname(path) by calling fn, creating leading
1159 * directories if necessary. Retry a few times in case we are racing
1160 * with another process that is trying to clean up the directory that
1161 * contains path. See the documentation for create_file_fn for more
1162 * details.
1163 *
1164 * Return the value and set the errno that resulted from the most
1165 * recent call of fn. fn is always called at least once, and will be
1166 * called more than once if it returns ENOENT or EISDIR.
1167 */
1168int raceproof_create_file(const char *path, create_file_fn fn, void *cb);
1169
90a6464b 1170int mkdir_in_gitdir(const char *path);
4aad2f16 1171extern char *expand_user_path(const char *path, int real_home);
1c64b48e 1172const char *enter_repo(const char *path, int strict);
e5392c51
JS
1173static inline int is_absolute_path(const char *path)
1174{
88135203 1175 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
e5392c51 1176}
90b4a71c 1177int is_directory(const char *);
a1ae4841
BW
1178char *strbuf_realpath(struct strbuf *resolved, const char *path,
1179 int die_on_error);
e2a57aac 1180const char *real_path(const char *path);
e3e46cdb 1181const char *real_path_if_valid(const char *path);
ce83eadd 1182char *real_pathdup(const char *path, int die_on_error);
e2a57aac 1183const char *absolute_path(const char *path);
b1edb40f 1184char *absolute_pathdup(const char *path);
41894ae3 1185const char *remove_leading_path(const char *in, const char *prefix);
e02ca72f 1186const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);
645a29c4 1187int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
f3cad0ad 1188int normalize_path_copy(char *dst, const char *src);
31171d9e 1189int longest_ancestor_length(const char *path, struct string_list *prefixes);
4fcc86b0 1190char *strip_path_suffix(const char *path, const char *suffix);
34b6cb8b 1191int daemon_avoid_alias(const char *path);
1d1d69bc 1192extern int is_ntfs_dotgit(const char *name);
b2cb9425 1193
ea19289b
PT
1194/**
1195 * Return a newly allocated string with the evaluation of
1196 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise
1197 * "$HOME/.config/git/$filename". Return NULL upon error.
1198 */
1199extern char *xdg_config_home(const char *filename);
1200
e7f136bf
DL
1201/**
1202 * Return a newly allocated string with the evaluation of
1203 * "$XDG_CACHE_HOME/git/$filename" if $XDG_CACHE_HOME is non-empty, otherwise
1204 * "$HOME/.cache/git/$filename". Return NULL upon error.
1205 */
1206extern char *xdg_cache_home(const char *filename);
1207
1f0c0d36
JT
1208extern void *read_sha1_file_extended(const unsigned char *sha1,
1209 enum object_type *type,
1210 unsigned long *size, int lookup_replace);
f5552aee
CC
1211static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
1212{
1f0c0d36 1213 return read_sha1_file_extended(sha1, type, size, 1);
5bf29b95 1214}
1f91e79c
MH
1215
1216/*
1217 * This internal function is only declared here for the benefit of
1218 * lookup_replace_object(). Please do not call it directly.
1219 */
e1111cef 1220extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
1f91e79c
MH
1221
1222/*
1223 * If object sha1 should be replaced, return the replacement object's
1224 * name (replaced recursively, if necessary). The return value is
1225 * either sha1 or a pointer to a permanently-allocated value. When
1226 * object replacement is suppressed, always return sha1.
1227 */
e1111cef
JH
1228static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
1229{
afc711b8 1230 if (!check_replace_refs)
e1111cef
JH
1231 return sha1;
1232 return do_lookup_replace_object(sha1);
f5552aee 1233}
1f91e79c 1234
e83c5163 1235/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
21666f1a 1236extern int sha1_object_info(const unsigned char *, unsigned long *);
ce9fbf16 1237extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
c00e657d 1238extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
0c3db67c 1239extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, unsigned char *sha1, unsigned flags);
21666f1a 1240extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
bbac7311 1241extern int force_object_loose(const unsigned char *sha1, time_t mtime);
1b8ac5ea 1242extern int git_open_cloexec(const char *name, int flags);
b4d065df 1243#define git_open(name) git_open_cloexec(name, O_RDONLY)
f0270efd 1244extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
eb4f4076 1245extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
f0270efd 1246extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
8237b185 1247
0e8189e2
NP
1248/* global flag to enable extra checks when accessing packed objects */
1249extern int do_check_packed_object_crc;
1250
5d6ccf5c 1251extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
e83c5163 1252
cb5add58 1253extern int finalize_object_file(const char *tmpfile, const char *filename);
8237b185 1254
cd673c1f 1255extern int has_sha1_pack(const unsigned char *sha1);
d40d535b 1256
f6371f92
JK
1257/*
1258 * Open the loose object at path, check its sha1, and return the contents,
1259 * type, and size. If the object is a blob, then "contents" may return NULL,
1260 * to allow streaming of large blobs.
1261 *
1262 * Returns 0 on success, negative on error (details may be written to stderr).
1263 */
1264int read_loose_object(const char *path,
1265 const unsigned char *expected_sha1,
1266 enum object_type *type,
1267 unsigned long *size,
1268 void **contents);
1269
d40d535b
MH
1270/*
1271 * Return true iff we have an object named sha1, whether local or in
1272 * an alternate object database, and whether packed or loose. This
1273 * function does not respect replace references.
0eeb077b
JK
1274 *
1275 * If the QUICK flag is set, do not re-check the pack directory
1276 * when we cannot find the object (this means we may give a false
1277 * negative answer if another process is simultaneously repacking).
d40d535b 1278 */
0eeb077b
JK
1279#define HAS_SHA1_QUICK 0x1
1280extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags);
1281static inline int has_sha1_file(const unsigned char *sha1)
1282{
1283 return has_sha1_file_with_flags(sha1, 0);
1284}
d40d535b 1285
b419aa25 1286/* Same as the above, except for struct object_id. */
1287extern int has_object_file(const struct object_id *oid);
5827a035 1288extern int has_object_file_with_flags(const struct object_id *oid, int flags);
b419aa25 1289
d40d535b
MH
1290/*
1291 * Return true iff an alternate object database has a loose object
1292 * with the specified name. This function does not respect replace
1293 * references.
1294 */
0f4dc14a 1295extern int has_loose_object_nonlocal(const unsigned char *sha1);
8237b185 1296
bf592c50
DB
1297extern int has_pack_index(const unsigned char *sha1);
1298
40d52ff7
JK
1299extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
1300
6a5e6f5e
CC
1301/* Helper to check and "touch" a file */
1302extern int check_and_freshen_file(const char *fn, int freshen);
1303
192a6be2
LT
1304extern const signed char hexval_table[256];
1305static inline unsigned int hexval(unsigned char c)
e49521b5
JH
1306{
1307 return hexval_table[c];
1308}
1309
d2330973
RS
1310/*
1311 * Convert two consecutive hexadecimal digits into a char. Return a
1312 * negative value on error. Don't run over the end of short strings.
1313 */
1314static inline int hex2chr(const char *s)
1315{
1316 int val = hexval(s[0]);
1317 return (val < 0) ? val : (val << 4) | hexval(s[1]);
1318}
1319
e83c5163 1320/* Convert to/from hex/sha1 representation */
dce96489
LT
1321#define MINIMUM_ABBREV minimum_abbrev
1322#define DEFAULT_ABBREV default_abbrev
46a6c262 1323
65acfeac
JH
1324/* used when the code does not know or care what the default abbrev is */
1325#define FALLBACK_DEFAULT_ABBREV 7
1326
573285e5
CP
1327struct object_context {
1328 unsigned char tree[20];
573285e5 1329 unsigned mode;
c4ec9677
DT
1330 /*
1331 * symlink_path is only used by get_tree_entry_follow_symlinks,
1332 * and only for symlinks that point outside the repository.
1333 */
1334 struct strbuf symlink_path;
dc944b65
JK
1335 /*
1336 * If GET_SHA1_RECORD_PATH is set, this will record path (if any)
1337 * found when resolving the name. The caller is responsible for
1338 * releasing the memory.
1339 */
1340 char *path;
573285e5
CP
1341};
1342
c4ec9677
DT
1343#define GET_SHA1_QUIETLY 01
1344#define GET_SHA1_COMMIT 02
1345#define GET_SHA1_COMMITTISH 04
1346#define GET_SHA1_TREE 010
1347#define GET_SHA1_TREEISH 020
1348#define GET_SHA1_BLOB 040
1349#define GET_SHA1_FOLLOW_SYMLINKS 0100
dc944b65 1350#define GET_SHA1_RECORD_PATH 0200
c4ec9677 1351#define GET_SHA1_ONLY_TO_DIE 04000
37c00e55 1352
259942f5
JK
1353#define GET_SHA1_DISAMBIGUATORS \
1354 (GET_SHA1_COMMIT | GET_SHA1_COMMITTISH | \
1355 GET_SHA1_TREE | GET_SHA1_TREEISH | \
1356 GET_SHA1_BLOB)
1357
3c249c95 1358extern int get_sha1(const char *str, unsigned char *sha1);
daba53ae 1359extern int get_sha1_commit(const char *str, unsigned char *sha1);
cd74e473 1360extern int get_sha1_committish(const char *str, unsigned char *sha1);
daba53ae
JH
1361extern int get_sha1_tree(const char *str, unsigned char *sha1);
1362extern int get_sha1_treeish(const char *str, unsigned char *sha1);
1363extern int get_sha1_blob(const char *str, unsigned char *sha1);
8c135ea2 1364extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
c0a487ea 1365extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *oc);
d4e85a1a 1366
2764fd93 1367extern int get_oid(const char *str, struct object_id *oid);
1368
1b7ba794 1369typedef int each_abbrev_fn(const struct object_id *oid, void *);
957d7406 1370extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
d4e85a1a 1371
5b33cb1f
JK
1372extern int set_disambiguate_hint_config(const char *var, const char *value);
1373
d4e85a1a
MH
1374/*
1375 * Try to read a SHA1 in hexadecimal format from the 40 characters
1376 * starting at hex. Write the 20-byte result to sha1 in binary form.
1377 * Return 0 on success. Reading stops if a NUL is encountered in the
1378 * input, so it is safe to pass this function an arbitrary
1379 * null-terminated string.
1380 */
197ee8c9 1381extern int get_sha1_hex(const char *hex, unsigned char *sha1);
aa1c6fdf 1382extern int get_oid_hex(const char *hex, struct object_id *sha1);
d4e85a1a 1383
af49c6d0
JK
1384/*
1385 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,
1386 * and writes the NUL-terminated output to the buffer `out`, which must be at
1387 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for
1388 * convenience.
1389 *
1390 * The non-`_r` variant returns a static buffer, but uses a ring of 4
1391 * buffers, making it safe to make multiple calls for a single statement, like:
1392 *
1393 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));
1394 */
1395extern char *sha1_to_hex_r(char *out, const unsigned char *sha1);
55c529a7 1396extern char *oid_to_hex_r(char *out, const struct object_id *oid);
197ee8c9 1397extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
aa1c6fdf 1398extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */
7cb36842 1399
605f430e 1400/*
1401 * Parse a 40-character hexadecimal object ID starting from hex, updating the
1402 * pointer specified by end when parsing stops. The resulting object ID is
1403 * stored in oid. Returns 0 on success. Parsing will stop on the first NUL or
1404 * other invalid character. end is only updated on success; otherwise, it is
1405 * unmodified.
1406 */
1407extern int parse_oid_hex(const char *hex, struct object_id *oid, const char **end);
1408
e322b60d
JK
1409/*
1410 * This reads short-hand syntax that not only evaluates to a commit
1411 * object name, but also can act as if the end user spelled the name
1412 * of the branch from the command line.
1413 *
1414 * - "@{-N}" finds the name of the Nth previous branch we were on, and
1415 * places the name of the branch in the given buf and returns the
1416 * number of characters parsed if successful.
1417 *
1418 * - "<branch>@{upstream}" finds the name of the other ref that
1419 * <branch> is configured to merge with (missing <branch> defaults
1420 * to the current branch), and places the name of the branch in the
1421 * given buf and returns the number of characters parsed if
1422 * successful.
1423 *
1424 * If the input is not of the accepted format, it returns a negative
1425 * number to signal an error.
1426 *
1427 * If the input was ok but there are not N branch switches in the
1428 * reflog, it returns 0.
0e9f62da
JK
1429 *
1430 * If "allowed" is non-zero, it is a treated as a bitfield of allowable
1431 * expansions: local branches ("refs/heads/"), remote branches
1432 * ("refs/remotes/"), or "HEAD". If no "allowed" bits are set, any expansion is
1433 * allowed, even ones to refs outside of those namespaces.
e322b60d 1434 */
0e9f62da
JK
1435#define INTERPRET_BRANCH_LOCAL (1<<0)
1436#define INTERPRET_BRANCH_REMOTE (1<<1)
1437#define INTERPRET_BRANCH_HEAD (1<<2)
1438extern int interpret_branch_name(const char *str, int len, struct strbuf *,
1439 unsigned allowed);
151b2911 1440extern int get_oid_mb(const char *str, struct object_id *oid);
e86eb666 1441
c847f537 1442extern int validate_headref(const char *ref);
e83c5163 1443
958ba6c9 1444extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
0ab9e1e8 1445extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
ccdd4a0f 1446extern int name_compare(const char *name1, size_t len1, const char *name2, size_t len2);
b60e188c 1447extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
e83c5163 1448
40469ee9 1449extern void *read_object_with_reference(const unsigned char *sha1,
bf0f910d 1450 const char *required_type,
40469ee9
JH
1451 unsigned long *size,
1452 unsigned char *sha1_ret);
f4913f91 1453
81776315
JH
1454extern struct object *peel_to_type(const char *name, int namelen,
1455 struct object *o, enum object_type);
1456
a5481a6c
JK
1457struct date_mode {
1458 enum date_mode_type {
1459 DATE_NORMAL = 0,
1460 DATE_RELATIVE,
1461 DATE_SHORT,
a5481a6c
JK
1462 DATE_ISO8601,
1463 DATE_ISO8601_STRICT,
1464 DATE_RFC2822,
aa1462cc 1465 DATE_STRFTIME,
642833db
JK
1466 DATE_RAW,
1467 DATE_UNIX
a5481a6c 1468 } type;
aa1462cc 1469 const char *strftime_fmt;
add00ba2 1470 int local;
73013afd
JH
1471};
1472
a5481a6c
JK
1473/*
1474 * Convenience helper for passing a constant type, like:
1475 *
1476 * show_date(t, tz, DATE_MODE(NORMAL));
1477 */
1478#define DATE_MODE(t) date_mode_from_type(DATE_##t)
1479struct date_mode *date_mode_from_type(enum date_mode_type type);
1480
dddbad72
JS
1481const char *show_date(timestamp_t time, int timezone, const struct date_mode *mode);
1482void show_date_relative(timestamp_t time, int tz, const struct timeval *now,
7d29afd4 1483 struct strbuf *timebuf);
c33ddc2e 1484int parse_date(const char *date, struct strbuf *out);
dddbad72
JS
1485int parse_date_basic(const char *date, timestamp_t *timestamp, int *offset);
1486int parse_expiry_date(const char *date, timestamp_t *timestamp);
c33ddc2e 1487void datestamp(struct strbuf *out);
93cfa7c7 1488#define approxidate(s) approxidate_careful((s), NULL)
dddbad72
JS
1489timestamp_t approxidate_careful(const char *, int *);
1490timestamp_t approxidate_relative(const char *date, const struct timeval *now);
a5481a6c 1491void parse_date_format(const char *format, struct date_mode *mode);
dddbad72 1492int date_overflows(timestamp_t date);
ecee9d9e 1493
f9bc573f 1494#define IDENT_STRICT 1
b9f0ac17 1495#define IDENT_NO_DATE 2
c15e1987 1496#define IDENT_NO_NAME 4
749be728
JH
1497extern const char *git_author_info(int);
1498extern const char *git_committer_info(int);
798123af 1499extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
d9ccfe77 1500extern const char *fmt_name(const char *name, const char *email);
9830534e 1501extern const char *ident_default_name(void);
bcb2b004 1502extern const char *ident_default_email(void);
44fcb497 1503extern const char *git_editor(void);
64778d24 1504extern const char *git_pager(int stdout_is_tty);
9597921b 1505extern int git_ident_config(const char *, const char *, void *);
4d9c7e6f 1506extern void reset_ident_date(void);
6aa33f40 1507
4b340cfa
JH
1508struct ident_split {
1509 const char *name_begin;
1510 const char *name_end;
1511 const char *mail_begin;
1512 const char *mail_end;
1513 const char *date_begin;
1514 const char *date_end;
1515 const char *tz_begin;
1516 const char *tz_end;
1517};
1518/*
1519 * Signals an success with 0, but time part of the result may be NULL
1520 * if the input lacks timestamp and zone
1521 */
1522extern int split_ident_line(struct ident_split *, const char *, int);
1523
d1053246
JK
1524/*
1525 * Like show_date, but pull the timestamp and tz parameters from
1526 * the ident_split. It will also sanity-check the values and produce
1527 * a well-known sentinel date if they appear bogus.
1528 */
a5481a6c
JK
1529const char *show_ident_date(const struct ident_split *id,
1530 const struct date_mode *mode);
d1053246 1531
662cc30c
JK
1532/*
1533 * Compare split idents for equality or strict ordering. Note that we
1534 * compare only the ident part of the line, ignoring any timestamp.
1535 *
1536 * Because there are two fields, we must choose one as the primary key; we
1537 * currently arbitrarily pick the email.
1538 */
1539extern int ident_cmp(const struct ident_split *, const struct ident_split *);
1540
12dccc16 1541struct checkout {
d4a2024a 1542 struct index_state *istate;
12dccc16
LT
1543 const char *base_dir;
1544 int base_dir_len;
1545 unsigned force:1,
1546 quiet:1,
1547 not_new:1,
1548 refresh_cache:1;
1549};
68e3d629 1550#define CHECKOUT_INIT { NULL, "" }
12dccc16 1551
af2a651d 1552#define TEMPORARY_FILENAME_LENGTH 25
efbc5831 1553extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
b9fd2846
LT
1554
1555struct cache_def {
e7c73053 1556 struct strbuf path;
b9fd2846
LT
1557 int flags;
1558 int track_flags;
1559 int prefix_len_stat_func;
1560};
e7c73053 1561#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }
2a608391 1562static inline void cache_def_clear(struct cache_def *cache)
e7c73053
KB
1563{
1564 strbuf_release(&cache->path);
1565}
b9fd2846 1566
57199892 1567extern int has_symlink_leading_path(const char *name, int len);
b9fd2846 1568extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
f66caaf9 1569extern int check_leading_path(const char *name, int len);
57199892 1570extern int has_dirs_only_path(const char *name, int len, int prefix_len);
78478927
KB
1571extern void schedule_dir_for_removal(const char *name, int len);
1572extern void remove_scheduled_dirs(void);
12dccc16 1573
9a217f2a 1574extern struct alternate_object_database {
d5a63b99 1575 struct alternate_object_database *next;
597f9134 1576
38dbe5f0
JK
1577 /* see alt_scratch_buf() */
1578 struct strbuf scratch;
1579 size_t base_len;
597f9134
JK
1580
1581 char path[FLEX_ARRAY];
d5a63b99 1582} *alt_odb_list;
9a217f2a 1583extern void prepare_alt_odb(void);
5e73633d 1584extern void read_info_alternates(const char * relative_base, int depth);
9eeea7d2 1585extern char *compute_alternate_path(const char *path, struct strbuf *err);
d79796bc 1586typedef int alt_odb_fn(struct alternate_object_database *, void *);
fe1b2268 1587extern int foreach_alt_odb(alt_odb_fn, void*);
9a217f2a 1588
7f0fa2c0
JK
1589/*
1590 * Allocate a "struct alternate_object_database" but do _not_ actually
1591 * add it to the list of alternates.
1592 */
1593struct alternate_object_database *alloc_alt_odb(const char *dir);
1594
a5b34d21
JK
1595/*
1596 * Add the directory to the on-disk alternates file; the new entry will also
1597 * take effect in the current process.
1598 */
1599extern void add_to_alternates_file(const char *dir);
1600
1601/*
1602 * Add the directory to the in-memory list of alternates (along with any
1603 * recursive alternates it points to), but do not modify the on-disk alternates
1604 * file.
1605 */
1606extern void add_to_alternates_memory(const char *dir);
1607
38dbe5f0
JK
1608/*
1609 * Returns a scratch strbuf pre-filled with the alternate object directory,
1610 * including a trailing slash, which can be used to access paths in the
1611 * alternate. Always use this over direct access to alt->scratch, as it
1612 * cleans up any previous use of the scratch buffer.
1613 */
1614extern struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);
1615
c41ee586
SP
1616struct pack_window {
1617 struct pack_window *next;
1618 unsigned char *base;
1619 off_t offset;
1620 size_t len;
1621 unsigned int last_used;
1622 unsigned int inuse_cnt;
1623};
1624
9a217f2a
JH
1625extern struct packed_git {
1626 struct packed_git *next;
c41ee586 1627 struct pack_window *windows;
2dc3a234 1628 off_t pack_size;
57059091
NP
1629 const void *index_data;
1630 size_t index_size;
1631 uint32_t num_objects;
8eca0b47
NP
1632 uint32_t num_bad_objects;
1633 unsigned char *bad_object_sha1;
42873078 1634 int index_version;
57059091 1635 time_t mtime;
9bc879c1 1636 int pack_fd;
8d25931d 1637 unsigned pack_local:1,
d131b7af 1638 pack_keep:1,
ee1c6c34 1639 freshened:1,
d131b7af 1640 do_not_close:1;
bf592c50 1641 unsigned char sha1[20];
9d98bbf5 1642 struct revindex_entry *revindex;
8f1d2e6f
JH
1643 /* something like ".git/objects/pack/xxxxx.pack" */
1644 char pack_name[FLEX_ARRAY]; /* more */
9a217f2a 1645} *packed_git;
f3bf9224 1646
a73cdd21
JK
1647/*
1648 * A most-recently-used ordered version of the packed_git list, which can
1649 * be iterated instead of packed_git (and marked via mru_mark).
1650 */
1651struct mru;
1652extern struct mru *packed_git_mru;
1653
f3bf9224 1654struct pack_entry {
c4001d92 1655 off_t offset;
f3bf9224
JH
1656 unsigned char sha1[20];
1657 struct packed_git *p;
1658};
1659
7b64469a 1660extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
bf592c50 1661
0a489b06
JH
1662/* A hook to report invalid files in pack directory */
1663#define PACKDIR_FILE_PACK 1
1664#define PACKDIR_FILE_IDX 2
1665#define PACKDIR_FILE_GARBAGE 4
1666extern void (*report_garbage)(unsigned seen_bits, const char *path);
543c5caa 1667
9a217f2a 1668extern void prepare_packed_git(void);
fc04c412 1669extern void reprepare_packed_git(void);
bf592c50
DB
1670extern void install_packed_git(struct packed_git *pack);
1671
8e3f52d7
JK
1672/*
1673 * Give a rough count of objects in the repository. This sacrifices accuracy
1674 * for speed.
1675 */
1676unsigned long approximate_object_count(void);
1677
a6080a0a 1678extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
bf592c50
DB
1679 struct packed_git *packs);
1680
276bc2ca 1681extern void pack_report(void);
d40d535b 1682
82c9d661 1683/*
892e723a
JK
1684 * Create a temporary file rooted in the object database directory, or
1685 * die on failure. The filename is taken from "pattern", which should have the
1686 * usual "XXXXXX" trailer, and the resulting filename is written into the
1687 * "template" buffer. Returns the open descriptor.
82c9d661 1688 */
594fa999 1689extern int odb_mkstemp(struct strbuf *template, const char *pattern);
82c9d661 1690
1cec8c63
JK
1691/*
1692 * Generate the filename to be used for a pack file with checksum "sha1" and
1693 * extension "ext". The result is written into the strbuf "buf", overwriting
1694 * any existing contents. A pointer to buf->buf is returned as a convenience.
1695 *
1696 * Example: odb_pack_name(out, sha1, "idx") => ".git/objects/pack/pack-1234..idx"
1697 */
1698extern char *odb_pack_name(struct strbuf *buf, const unsigned char *sha1, const char *ext);
1699
82c9d661 1700/*
eaeefc32
JK
1701 * Create a pack .keep file named "name" (which should generally be the output
1702 * of odb_pack_name). Returns a file descriptor opened for writing, or -1 on
1703 * error.
82c9d661 1704 */
eaeefc32 1705extern int odb_pack_keep(const char *name);
82c9d661 1706
d40d535b
MH
1707/*
1708 * mmap the index file for the specified packfile (if it is not
1709 * already mmapped). Return 0 on success.
1710 */
d079837e 1711extern int open_pack_index(struct packed_git *);
d40d535b
MH
1712
1713/*
1714 * munmap the index file for the specified packfile (if it is
1715 * currently mmapped).
1716 */
fa5fc15d 1717extern void close_pack_index(struct packed_git *);
d40d535b 1718
ef49a7a0 1719extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
c9ced051 1720extern void close_pack_windows(struct packed_git *);
38849a81 1721extern void close_all_packs(void);
03e79c88 1722extern void unuse_pack(struct pack_window **);
3d20c636 1723extern void clear_delta_base_cache(void);
48bcc1c3 1724extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local);
d40d535b 1725
47fe3f6e
JK
1726/*
1727 * Make sure that a pointer access into an mmap'd index file is within bounds,
1728 * and can provide at least 8 bytes of data.
1729 *
1730 * Note that this is only necessary for variable-length segments of the file
1731 * (like the 64-bit extended offset table), as we compare the size to the
1732 * fixed-length parts when we open the file.
1733 */
1734extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr);
1735
d40d535b
MH
1736/*
1737 * Return the SHA-1 of the nth object within the specified packfile.
1738 * Open the index if it is not already open. The return value points
1739 * at the SHA-1 within the mmapped index. Return NULL if there is an
1740 * error.
1741 */
1742extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
068f85e3 1743/*
1744 * Like nth_packed_object_sha1, but write the data into the object specified by
1745 * the the first argument. Returns the first argument on success, and NULL on
1746 * error.
1747 */
1748extern const struct object_id *nth_packed_object_oid(struct object_id *, struct packed_git *, uint32_t n);
d40d535b
MH
1749
1750/*
1751 * Return the offset of the nth object within the specified packfile.
1752 * The index must already be opened.
1753 */
1754extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);
1755
1756/*
1757 * If the object named sha1 is present in the specified packfile,
1758 * return its offset within the packfile; otherwise, return 0.
1759 */
1760extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
1761
4c080182 1762extern int is_pack_valid(struct packed_git *);
c4001d92 1763extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
09ded04b 1764extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
54dab52a 1765extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
f8c8abc5 1766extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
9a217f2a 1767
27e1e22d
JK
1768/*
1769 * Iterate over the files in the loose-object parts of the object
1770 * directory "path", triggering the following callbacks:
1771 *
1772 * - loose_object is called for each loose object we find.
1773 *
1774 * - loose_cruft is called for any files that do not appear to be
1775 * loose objects. Note that we only look in the loose object
1776 * directories "objects/[0-9a-f]{2}/", so we will not report
1777 * "objects/foobar" as cruft.
1778 *
1779 * - loose_subdir is called for each top-level hashed subdirectory
1780 * of the object directory (e.g., "$OBJDIR/f0"). It is called
1781 * after the objects in the directory are processed.
1782 *
1783 * Any callback that is NULL will be ignored. Callbacks returning non-zero
1784 * will end the iteration.
e6f875e0
JK
1785 *
1786 * In the "buf" variant, "path" is a strbuf which will also be used as a
1787 * scratch buffer, but restored to its original contents before
1788 * the function returns.
27e1e22d 1789 */
76c1d9a0 1790typedef int each_loose_object_fn(const struct object_id *oid,
27e1e22d
JK
1791 const char *path,
1792 void *data);
1793typedef int each_loose_cruft_fn(const char *basename,
1794 const char *path,
1795 void *data);
1796typedef int each_loose_subdir_fn(int nr,
1797 const char *path,
1798 void *data);
1799int for_each_loose_file_in_objdir(const char *path,
1800 each_loose_object_fn obj_cb,
1801 each_loose_cruft_fn cruft_cb,
1802 each_loose_subdir_fn subdir_cb,
1803 void *data);
e6f875e0
JK
1804int for_each_loose_file_in_objdir_buf(struct strbuf *path,
1805 each_loose_object_fn obj_cb,
1806 each_loose_cruft_fn cruft_cb,
1807 each_loose_subdir_fn subdir_cb,
1808 void *data);
27e1e22d 1809
660c889e
JK
1810/*
1811 * Iterate over loose and packed objects in both the local
1385bb7b
JK
1812 * repository and any alternates repositories (unless the
1813 * LOCAL_ONLY flag is set).
660c889e 1814 */
1385bb7b 1815#define FOR_EACH_OBJECT_LOCAL_ONLY 0x1
76c1d9a0 1816typedef int each_packed_object_fn(const struct object_id *oid,
660c889e
JK
1817 struct packed_git *pack,
1818 uint32_t pos,
1819 void *data);
1385bb7b
JK
1820extern int for_each_loose_object(each_loose_object_fn, void *, unsigned flags);
1821extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags);
660c889e 1822
9a490590
JH
1823struct object_info {
1824 /* Request */
5b086407 1825 enum object_type *typep;
9a490590 1826 unsigned long *sizep;
166df26f 1827 off_t *disk_sizep;
5d642e75 1828 unsigned char *delta_base_sha1;
46f03448 1829 struct strbuf *typename;
c84a1f3e 1830 void **contentp;
9a490590
JH
1831
1832 /* Response */
1833 enum {
1834 OI_CACHED,
1835 OI_LOOSE,
5266d369
JH
1836 OI_PACKED,
1837 OI_DBCACHED
9a490590
JH
1838 } whence;
1839 union {
1840 /*
1841 * struct {
1842 * ... Nothing to expose in this case
1843 * } cached;
1844 * struct {
1845 * ... Nothing to expose in this case
1846 * } loose;
1847 */
1848 struct {
1849 struct packed_git *pack;
1850 off_t offset;
1851 unsigned int is_delta;
1852 } packed;
1853 } u;
1854};
27b5c1a0
JK
1855
1856/*
1857 * Initializer for a "struct object_info" that wants no items. You may
1858 * also memset() the memory to all-zeroes.
1859 */
1860#define OBJECT_INFO_INIT {NULL}
1861
1f0c0d36
JT
1862/* Invoke lookup_replace_object() on the given hash */
1863#define OBJECT_INFO_LOOKUP_REPLACE 1
19fc5e84
JT
1864/* Allow reading from a loose object file of unknown/bogus type */
1865#define OBJECT_INFO_ALLOW_UNKNOWN_TYPE 2
de7b5d62 1866extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags);
ca79c985 1867extern int packed_object_info(struct packed_git *pack, off_t offset, struct object_info *);
9a217f2a 1868
8f3f9b09
JH
1869/* Dumb servers support */
1870extern int update_server_info(int);
1871
7a397419
MG
1872/* git_config_parse_key() returns these negated: */
1873#define CONFIG_INVALID_KEY 1
1874#define CONFIG_NO_SECTION_OR_NAME 2
30598ad0 1875/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */
7a397419
MG
1876#define CONFIG_NO_LOCK -1
1877#define CONFIG_INVALID_FILE 3
1878#define CONFIG_NO_WRITE 4
1879#define CONFIG_NOTHING_SET 5
1880#define CONFIG_INVALID_PATTERN 6
9409c7a5 1881#define CONFIG_GENERIC_ERROR 7
7a397419 1882
c1063be2
JK
1883#define CONFIG_REGEX_NONE ((void *)1)
1884
c8985ce0 1885struct git_config_source {
3caec73b 1886 unsigned int use_stdin:1;
c8985ce0
KS
1887 const char *file;
1888 const char *blob;
1889};
1890
1b8132d9
VA
1891enum config_origin_type {
1892 CONFIG_ORIGIN_BLOB,
1893 CONFIG_ORIGIN_FILE,
1894 CONFIG_ORIGIN_STDIN,
1895 CONFIG_ORIGIN_SUBMODULE_BLOB,
1896 CONFIG_ORIGIN_CMDLINE
1897};
1898
c48f4b37
NTND
1899struct config_options {
1900 unsigned int respect_includes : 1;
2185fde5 1901 const char *git_dir;
c48f4b37
NTND
1902};
1903
ef90d6d4
JS
1904typedef int (*config_fn_t)(const char *, const char *, void *);
1905extern int git_default_config(const char *, const char *, void *);
1906extern int git_config_from_file(config_fn_t fn, const char *, void *);
1b8132d9 1907extern int git_config_from_mem(config_fn_t fn, const enum config_origin_type,
473166b9 1908 const char *name, const char *buf, size_t len, void *data);
9ebf689a
BW
1909extern int git_config_from_blob_sha1(config_fn_t fn, const char *name,
1910 const unsigned char *sha1, void *data);
2b64fc89 1911extern void git_config_push_parameter(const char *text);
b3d83d9f 1912extern int git_config_from_parameters(config_fn_t fn, void *data);
0654aa57 1913extern void read_early_config(config_fn_t cb, void *data);
aace4385 1914extern void git_config(config_fn_t fn, void *);
9b25a0b5 1915extern int git_config_with_options(config_fn_t fn, void *,
c8985ce0 1916 struct git_config_source *config_source,
c48f4b37 1917 const struct config_options *opts);
0b87b6e0 1918extern int git_parse_ulong(const char *, unsigned long *);
9a549d43 1919extern int git_parse_maybe_bool(const char *);
17712991 1920extern int git_config_int(const char *, const char *);
00160242 1921extern int64_t git_config_int64(const char *, const char *);
0b87b6e0 1922extern unsigned long git_config_ulong(const char *, const char *);
37ee680d 1923extern ssize_t git_config_ssize_t(const char *, const char *);
a53f2ec6 1924extern int git_config_bool_or_int(const char *, const char *, int *);
17712991 1925extern int git_config_bool(const char *, const char *);
8420ccd8 1926extern int git_config_maybe_bool(const char *, const char *);
ea5105a5 1927extern int git_config_string(const char **, const char *, const char *);
395de250 1928extern int git_config_pathname(const char **, const char *, const char *);
30598ad0 1929extern int git_config_set_in_file_gently(const char *, const char *, const char *);
3d180648 1930extern void git_config_set_in_file(const char *, const char *, const char *);
30598ad0 1931extern int git_config_set_gently(const char *, const char *);
3d180648 1932extern void git_config_set(const char *, const char *);
b09c53a3 1933extern int git_config_parse_key(const char *, char **, int *);
9e9de18f 1934extern int git_config_key_is_valid(const char *key);
30598ad0 1935extern int git_config_set_multivar_gently(const char *, const char *, const char *, int);
3d180648 1936extern void git_config_set_multivar(const char *, const char *, const char *, int);
30598ad0 1937extern int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, int);
3d180648 1938extern void git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
0667fcfb 1939extern int git_config_rename_section(const char *, const char *);
42bd39b5 1940extern int git_config_rename_section_in_file(const char *, const char *, const char *);
506b17b1 1941extern const char *git_etc_gitconfig(void);
0ef37164 1942extern int git_env_bool(const char *, int);
23b0c478 1943extern unsigned long git_env_ulong(const char *, unsigned long);
ab88c363 1944extern int git_config_system(void);
40ea4ed9 1945extern int config_error_nonbool(const char *);
ff0a80af 1946#if defined(__GNUC__)
87fe5df3 1947#define config_error_nonbool(s) (config_error_nonbool(s), const_error())
a469a101 1948#endif
a6fa5992
PN
1949extern const char *get_log_output_encoding(void);
1950extern const char *get_commit_output_encoding(void);
1951
2496844b 1952extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
9acc5911
JK
1953
1954enum config_scope {
1955 CONFIG_SCOPE_UNKNOWN = 0,
1956 CONFIG_SCOPE_SYSTEM,
1957 CONFIG_SCOPE_GLOBAL,
1958 CONFIG_SCOPE_REPO,
1959 CONFIG_SCOPE_CMDLINE,
1960};
1961
1962extern enum config_scope current_config_scope(void);
473166b9
LS
1963extern const char *current_config_origin_type(void);
1964extern const char *current_config_name(void);
2496844b 1965
9b25a0b5
JK
1966struct config_include_data {
1967 int depth;
1968 config_fn_t fn;
1969 void *data;
c48f4b37 1970 const struct config_options *opts;
9b25a0b5
JK
1971};
1972#define CONFIG_INCLUDE_INIT { 0 }
1973extern int git_config_include(const char *name, const char *value, void *data);
17712991 1974
1b86bbb0
JK
1975/*
1976 * Match and parse a config key of the form:
1977 *
1978 * section.(subsection.)?key
1979 *
1980 * (i.e., what gets handed to a config_fn_t). The caller provides the section;
1981 * we return -1 if it does not match, 0 otherwise. The subsection and key
48f8d9f7 1982 * out-parameters are filled by the function (and *subsection is NULL if it is
1b86bbb0 1983 * missing).
48f8d9f7
JK
1984 *
1985 * If the subsection pointer-to-pointer passed in is NULL, returns 0 only if
1986 * there is no subsection at all.
1b86bbb0
JK
1987 */
1988extern int parse_config_key(const char *var,
1989 const char *section,
1990 const char **subsection, int *subsection_len,
1991 const char **key);
1992
155ef25f
TA
1993struct config_set_element {
1994 struct hashmap_entry ent;
1995 char *key;
1996 struct string_list value_list;
1997};
1998
1999struct configset_list_item {
2000 struct config_set_element *e;
2001 int value_index;
2002};
2003
2004/*
2005 * the contents of the list are ordered according to their
2006 * position in the config files and order of parsing the files.
2007 * (i.e. key-value pair at the last position of .git/config will
2008 * be at the last item of the list)
2009 */
2010struct configset_list {
2011 struct configset_list_item *items;
2012 unsigned int nr, alloc;
2013};
2014
3c8687a7
TA
2015struct config_set {
2016 struct hashmap config_hash;
2017 int hash_initialized;
155ef25f 2018 struct configset_list list;
3c8687a7
TA
2019};
2020
2021extern void git_configset_init(struct config_set *cs);
2022extern int git_configset_add_file(struct config_set *cs, const char *filename);
2023extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value);
2024extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key);
2025extern void git_configset_clear(struct config_set *cs);
2026extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest);
2027extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest);
2028extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest);
2029extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest);
2030extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest);
2031extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest);
2032extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest);
2033extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest);
2034
2035extern int git_config_get_value(const char *key, const char **value);
2036extern const struct string_list *git_config_get_value_multi(const char *key);
2037extern void git_config_clear(void);
2038extern void git_config_iter(config_fn_t fn, void *data);
2039extern int git_config_get_string_const(const char *key, const char **dest);
2040extern int git_config_get_string(const char *key, char **dest);
2041extern int git_config_get_int(const char *key, int *dest);
2042extern int git_config_get_ulong(const char *key, unsigned long *dest);
2043extern int git_config_get_bool(const char *key, int *dest);
2044extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest);
2045extern int git_config_get_maybe_bool(const char *key, int *dest);
2046extern int git_config_get_pathname(const char *key, const char **dest);
435ec090 2047extern int git_config_get_untracked_cache(void);
1f44b09b 2048extern int git_config_get_split_index(void);
72dcb7b3 2049extern int git_config_get_max_percent_split_change(void);
3c8687a7 2050
77d67977
CC
2051/* This dies if the configured or default date is in the future */
2052extern int git_config_get_expiry(const char *key, const char **output);
3c8687a7 2053
dae6c322
CC
2054/*
2055 * This is a hack for test programs like test-dump-untracked-cache to
2056 * ensure that they do not modify the untracked cache when reading it.
2057 * Do not use it otherwise!
2058 */
2059extern int ignore_untracked_cache_config;
3c8687a7 2060
3df8fd62
TA
2061struct key_value_info {
2062 const char *filename;
2063 int linenr;
1b8132d9 2064 enum config_origin_type origin_type;
9acc5911 2065 enum config_scope scope;
3df8fd62
TA
2066};
2067
5a80e97c
TA
2068extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3)));
2069extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr);
2070
d6991cee
JK
2071extern int committer_ident_sufficiently_given(void);
2072extern int author_ident_sufficiently_given(void);
e1b10391 2073
1a8f2741 2074extern const char *git_commit_encoding;
3a55602e 2075extern const char *git_log_output_encoding;
d551a488 2076extern const char *git_mailmap_file;
08610900 2077extern const char *git_mailmap_blob;
4e72dcec 2078
06f59e9f
TT
2079/* IO helper functions */
2080extern void maybe_flush_or_die(FILE *, const char *);
9540ce50
JK
2081__attribute__((format (printf, 2, 3)))
2082extern void fprintf_or_die(FILE *, const char *fmt, ...);
00b7cbfc
JH
2083
2084#define COPY_READ_ERROR (-2)
2085#define COPY_WRITE_ERROR (-3)
f3123c4a 2086extern int copy_fd(int ifd, int ofd);
1468bd47 2087extern int copy_file(const char *dst, const char *src, int mode);
f7835a25 2088extern int copy_file_with_time(const char *dst, const char *src, int mode);
00b7cbfc 2089
7230e6d0 2090extern void write_or_die(int fd, const void *buf, size_t count);
4c81b03e 2091extern void fsync_or_die(int fd, const char *);
ad897215 2092
2b7ca830
JM
2093extern ssize_t read_in_full(int fd, void *buf, size_t count);
2094extern ssize_t write_in_full(int fd, const void *buf, size_t count);
426ddeea
YM
2095extern ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset);
2096
2b7ca830
JM
2097static inline ssize_t write_str_in_full(int fd, const char *str)
2098{
2099 return write_in_full(fd, str, strlen(str));
2100}
12d6ce1d 2101
52563d7e
JK
2102/**
2103 * Open (and truncate) the file at path, write the contents of buf to it,
2104 * and close it. Dies if any errors are encountered.
2105 */
2106extern void write_file_buf(const char *path, const char *buf, size_t len);
2107
e04d08a4
JK
2108/**
2109 * Like write_file_buf(), but format the contents into a buffer first.
2110 * Additionally, write_file() will append a newline if one is not already
2111 * present, making it convenient to write text files:
2112 *
2113 * write_file(path, "counter: %d", ctr);
2114 */
2115__attribute__((format (printf, 2, 3)))
ef22318c 2116extern void write_file(const char *path, const char *fmt, ...);
2b7ca830 2117
f67b45f8
LT
2118/* pager.c */
2119extern void setup_pager(void);
6e9af863 2120extern int pager_in_use(void);
aa086eb8 2121extern int pager_use_color;
ad6c3739 2122extern int term_columns(void);
d306f3d3 2123extern int decimal_width(uintmax_t);
4914c962 2124extern int check_pager_config(const char *cmd);
3e3a4a41 2125extern void prepare_pager_args(struct child_process *, const char *pager);
f67b45f8 2126
ee9601e6 2127extern const char *editor_program;
d3e7da89 2128extern const char *askpass_program;
dfb068be 2129extern const char *excludes_file;
4d87b9c5 2130
051308f6 2131/* base85 */
f9815772
JM
2132int decode_85(char *dst, const char *line, int linelen);
2133void encode_85(char *buf, const unsigned char *data, int bytes);
051308f6 2134
855419f7 2135/* alloc.c */
100c5f3b
LT
2136extern void *alloc_blob_node(void);
2137extern void *alloc_tree_node(void);
2138extern void *alloc_commit_node(void);
2139extern void *alloc_tag_node(void);
2140extern void *alloc_object_node(void);
855419f7 2141extern void alloc_report(void);
94d5a22c 2142extern unsigned int alloc_commit_index(void);
855419f7 2143
5991a55c 2144/* pkt-line.c */
bbc30f99 2145void packet_trace_identity(const char *prog);
6ce4e61f 2146
b6ec1d61 2147/* add */
7ae02a30
AR
2148/*
2149 * return 0 if success, 1 - if addition of a file failed and
2150 * ADD_FILES_IGNORE_ERRORS was specified in flags
2151 */
610d55af 2152int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags);
b6ec1d61 2153
aecbf914
JH
2154/* diff.c */
2155extern int diff_auto_refresh_index;
2156
68faf689 2157/* match-trees.c */
82db3d44 2158void shift_tree(const struct object_id *, const struct object_id *, struct object_id *, int);
2159void shift_tree_by(const struct object_id *, const struct object_id *, struct object_id *, const char *);
68faf689 2160
a9cc857a
JH
2161/*
2162 * whitespace rules.
2163 * used by both diff and apply
f4b05a49 2164 * last two digits are tab width
a9cc857a 2165 */
f4b05a49
JS
2166#define WS_BLANK_AT_EOL 0100
2167#define WS_SPACE_BEFORE_TAB 0200
2168#define WS_INDENT_WITH_NON_TAB 0400
2169#define WS_CR_AT_EOL 01000
2170#define WS_BLANK_AT_EOF 02000
2171#define WS_TAB_IN_INDENT 04000
aeb84b05 2172#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
f4b05a49
JS
2173#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
2174#define WS_TAB_WIDTH_MASK 077
cf1b7869
JH
2175extern unsigned whitespace_rule_cfg;
2176extern unsigned whitespace_rule(const char *);
2177extern unsigned parse_whitespace_rule(const char *);
8f8841e9
JH
2178extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
2179extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
c1795bb0 2180extern char *whitespace_error_string(unsigned ws);
d511bd33 2181extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
877f23cc 2182extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
f4b05a49 2183#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
a9cc857a 2184
ee425e46 2185/* ls-files */
ee425e46
JH
2186void overlay_tree_on_cache(const char *tree_name, const char *prefix);
2187
94351118 2188char *alias_lookup(const char *alias);
0989fe96 2189int split_cmdline(char *cmdline, const char ***argv);
ad9ac6db
GB
2190/* Takes a negative value returned by split_cmdline */
2191const char *split_cmdline_strerror(int cmdline_errno);
94351118 2192
46c3cd44 2193/* setup.c */
e37c1329 2194struct startup_info {
a60645f9 2195 int have_repository;
f07d6a1a 2196 const char *prefix;
e37c1329
NTND
2197};
2198extern struct startup_info *startup_info;
2199
db699a8a
NTND
2200/* merge.c */
2201struct commit_list;
2202int try_merge_command(const char *strategy, size_t xopts_nr,
2203 const char **xopts, struct commit_list *common,
2204 const char *head_arg, struct commit_list *remotes);
f06e90da 2205int checkout_fast_forward(const struct object_id *from,
2206 const struct object_id *to,
db699a8a
NTND
2207 int overwrite_ignore);
2208
cac42b26 2209
38f865c2
JK
2210int sane_execvp(const char *file, char *const argv[]);
2211
38612532
MH
2212/*
2213 * A struct to encapsulate the concept of whether a file has changed
2214 * since we last checked it. This uses criteria similar to those used
2215 * for the index.
2216 */
2217struct stat_validity {
2218 struct stat_data *sd;
2219};
2220
2221void stat_validity_clear(struct stat_validity *sv);
2222
2223/*
2224 * Returns 1 if the path is a regular file (or a symlink to a regular
2225 * file) and matches the saved stat_validity, 0 otherwise. A missing
2226 * or inaccessible file is considered a match if the struct was just
2227 * initialized, or if the previous update found an inaccessible file.
2228 */
2229int stat_validity_check(struct stat_validity *sv, const char *path);
2230
2231/*
2232 * Update the stat_validity from a file opened at descriptor fd. If
2233 * the file is missing, inaccessible, or not a regular file, then
2234 * future calls to stat_validity_check will match iff one of those
2235 * conditions continues to be true.
2236 */
2237void stat_validity_update(struct stat_validity *sv, int fd);
2238
9ef176b5 2239int versioncmp(const char *s1, const char *s2);
2024d317 2240void sleep_millisec(int millisec);
9ef176b5 2241
eb33876c
DT
2242/*
2243 * Create a directory and (if share is nonzero) adjust its permissions
2244 * according to the shared_repository setting. Only use this for
2245 * directories under $GIT_DIR. Don't use it for working tree
2246 * directories.
2247 */
2248void safe_create_dir(const char *dir, int share);
2249
e83c5163 2250#endif /* CACHE_H */