1#ifndef CACHE_H 2#define CACHE_H 3 4#include "git-compat-util.h" 5#include "strbuf.h" 6#include "hashmap.h" 7#include "advice.h" 8#include "gettext.h" 9#include "convert.h" 10#include "trace.h" 11#include "string-list.h" 12#include "pack-revindex.h" 13 14#include SHA1_HEADER 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 27#endif 28 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 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 38#endif 39 40#include <zlib.h> 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); 58void git_deflate_init_raw(git_zstream *, int level); 59void git_deflate_end(git_zstream *); 60int git_deflate_abort(git_zstream *); 61int git_deflate_end_gently(git_zstream *); 62int git_deflate(git_zstream *, int flush); 63unsigned long git_deflate_bound(git_zstream *, unsigned long); 64 65/* The length in bytes and in hex digits of an object name (SHA-1 value). */ 66#define GIT_SHA1_RAWSZ 20 67#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) 68 69struct object_id { 70 unsigned char hash[GIT_SHA1_RAWSZ]; 71}; 72 73#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) 74#define DTYPE(de) ((de)->d_type) 75#else 76#undef DT_UNKNOWN 77#undef DT_DIR 78#undef DT_REG 79#undef DT_LNK 80#define DT_UNKNOWN 0 81#define DT_DIR 1 82#define DT_REG 2 83#define DT_LNK 3 84#define DTYPE(de) DT_UNKNOWN 85#endif 86 87/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */ 88#define S_IFINVALID 0030000 89 90/* 91 * A "directory link" is a link to another git directory. 92 * 93 * The value 0160000 is not normally a valid mode, and 94 * also just happens to be S_IFDIR + S_IFLNK 95 */ 96#define S_IFGITLINK 0160000 97#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) 98 99/* 100 * Some mode bits are also used internally for computations. 101 * 102 * They *must* not overlap with any valid modes, and they *must* not be emitted 103 * to outside world - i.e. appear on disk or network. In other words, it's just 104 * temporary fields, which we internally use, but they have to stay in-house. 105 * 106 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git 107 * codebase mode is `unsigned int` which is assumed to be at least 32 bits ) 108 */ 109 110/* used internally in tree-diff */ 111#define S_DIFFTREE_IFXMIN_NEQ 0x80000000 112 113 114/* 115 * Intensive research over the course of many years has shown that 116 * port 9418 is totally unused by anything else. Or 117 * 118 * Your search - "port 9418" - did not match any documents. 119 * 120 * as www.google.com puts it. 121 * 122 * This port has been properly assigned for git use by IANA: 123 * git (Assigned-9418) [I06-050728-0001]. 124 * 125 * git 9418/tcp git pack transfer service 126 * git 9418/udp git pack transfer service 127 * 128 * with Linus Torvalds <torvalds@osdl.org> as the point of 129 * contact. September 2005. 130 * 131 * See http://www.iana.org/assignments/port-numbers 132 */ 133#define DEFAULT_GIT_PORT 9418 134 135/* 136 * Basic data structures for the directory cache 137 */ 138 139#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */ 140struct cache_header { 141 uint32_t hdr_signature; 142 uint32_t hdr_version; 143 uint32_t hdr_entries; 144}; 145 146#define INDEX_FORMAT_LB 2 147#define INDEX_FORMAT_UB 4 148 149/* 150 * The "cache_time" is just the low 32 bits of the 151 * time. It doesn't matter if it overflows - we only 152 * check it for equality in the 32 bits we save. 153 */ 154struct cache_time { 155 uint32_t sec; 156 uint32_t nsec; 157}; 158 159struct stat_data { 160 struct cache_time sd_ctime; 161 struct cache_time sd_mtime; 162 unsigned int sd_dev; 163 unsigned int sd_ino; 164 unsigned int sd_uid; 165 unsigned int sd_gid; 166 unsigned int sd_size; 167}; 168 169struct cache_entry { 170 struct hashmap_entry ent; 171 struct stat_data ce_stat_data; 172 unsigned int ce_mode; 173 unsigned int ce_flags; 174 unsigned int ce_namelen; 175 unsigned int index; /* for link extension */ 176 struct object_id oid; 177 char name[FLEX_ARRAY]; /* more */ 178}; 179 180#define CE_STAGEMASK (0x3000) 181#define CE_EXTENDED (0x4000) 182#define CE_VALID (0x8000) 183#define CE_STAGESHIFT 12 184 185/* 186 * Range 0xFFFF0FFF in ce_flags is divided into 187 * two parts: in-memory flags and on-disk ones. 188 * Flags in CE_EXTENDED_FLAGS will get saved on-disk 189 * if you want to save a new flag, add it in 190 * CE_EXTENDED_FLAGS 191 * 192 * In-memory only flags 193 */ 194#define CE_UPDATE (1 << 16) 195#define CE_REMOVE (1 << 17) 196#define CE_UPTODATE (1 << 18) 197#define CE_ADDED (1 << 19) 198 199#define CE_HASHED (1 << 20) 200#define CE_WT_REMOVE (1 << 22) /* remove in work directory */ 201#define CE_CONFLICTED (1 << 23) 202 203#define CE_UNPACKED (1 << 24) 204#define CE_NEW_SKIP_WORKTREE (1 << 25) 205 206/* used to temporarily mark paths matched by pathspecs */ 207#define CE_MATCHED (1 << 26) 208 209#define CE_UPDATE_IN_BASE (1 << 27) 210#define CE_STRIP_NAME (1 << 28) 211 212/* 213 * Extended on-disk flags 214 */ 215#define CE_INTENT_TO_ADD (1 << 29) 216#define CE_SKIP_WORKTREE (1 << 30) 217/* CE_EXTENDED2 is for future extension */ 218#define CE_EXTENDED2 (1U << 31) 219 220#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) 221 222/* 223 * Safeguard to avoid saving wrong flags: 224 * - CE_EXTENDED2 won't get saved until its semantic is known 225 * - Bits in 0x0000FFFF have been saved in ce_flags already 226 * - Bits in 0x003F0000 are currently in-memory flags 227 */ 228#if CE_EXTENDED_FLAGS & 0x803FFFFF 229#error "CE_EXTENDED_FLAGS out of range" 230#endif 231 232/* Forward structure decls */ 233struct pathspec; 234struct child_process; 235 236/* 237 * Copy the sha1 and stat state of a cache entry from one to 238 * another. But we never change the name, or the hash state! 239 */ 240static inline void copy_cache_entry(struct cache_entry *dst, 241 const struct cache_entry *src) 242{ 243 unsigned int state = dst->ce_flags & CE_HASHED; 244 245 /* Don't copy hash chain and name */ 246 memcpy(&dst->ce_stat_data, &src->ce_stat_data, 247 offsetof(struct cache_entry, name) - 248 offsetof(struct cache_entry, ce_stat_data)); 249 250 /* Restore the hash state */ 251 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; 252} 253 254static inline unsigned create_ce_flags(unsigned stage) 255{ 256 return (stage << CE_STAGESHIFT); 257} 258 259#define ce_namelen(ce) ((ce)->ce_namelen) 260#define ce_size(ce) cache_entry_size(ce_namelen(ce)) 261#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) 262#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE) 263#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE) 264#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE) 265#define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD) 266 267#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) 268static inline unsigned int create_ce_mode(unsigned int mode) 269{ 270 if (S_ISLNK(mode)) 271 return S_IFLNK; 272 if (S_ISDIR(mode) || S_ISGITLINK(mode)) 273 return S_IFGITLINK; 274 return S_IFREG | ce_permissions(mode); 275} 276static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce, 277 unsigned int mode) 278{ 279 extern int trust_executable_bit, has_symlinks; 280 if (!has_symlinks && S_ISREG(mode) && 281 ce && S_ISLNK(ce->ce_mode)) 282 return ce->ce_mode; 283 if (!trust_executable_bit && S_ISREG(mode)) { 284 if (ce && S_ISREG(ce->ce_mode)) 285 return ce->ce_mode; 286 return create_ce_mode(0666); 287 } 288 return create_ce_mode(mode); 289} 290static inline int ce_to_dtype(const struct cache_entry *ce) 291{ 292 unsigned ce_mode = ntohl(ce->ce_mode); 293 if (S_ISREG(ce_mode)) 294 return DT_REG; 295 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode)) 296 return DT_DIR; 297 else if (S_ISLNK(ce_mode)) 298 return DT_LNK; 299 else 300 return DT_UNKNOWN; 301} 302static inline unsigned int canon_mode(unsigned int mode) 303{ 304 if (S_ISREG(mode)) 305 return S_IFREG | ce_permissions(mode); 306 if (S_ISLNK(mode)) 307 return S_IFLNK; 308 if (S_ISDIR(mode)) 309 return S_IFDIR; 310 return S_IFGITLINK; 311} 312 313#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) 314 315#define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */ 316#define CE_ENTRY_CHANGED (1 << 1) 317#define CE_ENTRY_REMOVED (1 << 2) 318#define CE_ENTRY_ADDED (1 << 3) 319#define RESOLVE_UNDO_CHANGED (1 << 4) 320#define CACHE_TREE_CHANGED (1 << 5) 321#define SPLIT_INDEX_ORDERED (1 << 6) 322#define UNTRACKED_CHANGED (1 << 7) 323 324struct split_index; 325struct untracked_cache; 326 327struct index_state { 328 struct cache_entry **cache; 329 unsigned int version; 330 unsigned int cache_nr, cache_alloc, cache_changed; 331 struct string_list *resolve_undo; 332 struct cache_tree *cache_tree; 333 struct split_index *split_index; 334 struct cache_time timestamp; 335 unsigned name_hash_initialized : 1, 336 initialized : 1; 337 struct hashmap name_hash; 338 struct hashmap dir_hash; 339 unsigned char sha1[20]; 340 struct untracked_cache *untracked; 341}; 342 343extern struct index_state the_index; 344 345/* Name hashing */ 346extern void add_name_hash(struct index_state *istate, struct cache_entry *ce); 347extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce); 348extern void free_name_hash(struct index_state *istate); 349 350 351#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS 352#define active_cache (the_index.cache) 353#define active_nr (the_index.cache_nr) 354#define active_alloc (the_index.cache_alloc) 355#define active_cache_changed (the_index.cache_changed) 356#define active_cache_tree (the_index.cache_tree) 357 358#define read_cache() read_index(&the_index) 359#define read_cache_from(path) read_index_from(&the_index, (path)) 360#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) 361#define is_cache_unborn() is_index_unborn(&the_index) 362#define read_cache_unmerged() read_index_unmerged(&the_index) 363#define discard_cache() discard_index(&the_index) 364#define unmerged_cache() unmerged_index(&the_index) 365#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) 366#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) 367#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) 368#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) 369#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) 370#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags)) 371#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) 372#define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip)) 373#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) 374#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) 375#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) 376#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) 377#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) 378#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) 379#define resolve_undo_clear() resolve_undo_clear_index(&the_index) 380#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) 381#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) 382#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) 383#endif 384 385enum object_type { 386 OBJ_BAD = -1, 387 OBJ_NONE = 0, 388 OBJ_COMMIT = 1, 389 OBJ_TREE = 2, 390 OBJ_BLOB = 3, 391 OBJ_TAG = 4, 392 /* 5 for future expansion */ 393 OBJ_OFS_DELTA = 6, 394 OBJ_REF_DELTA = 7, 395 OBJ_ANY, 396 OBJ_MAX 397}; 398 399static inline enum object_type object_type(unsigned int mode) 400{ 401 return S_ISDIR(mode) ? OBJ_TREE : 402 S_ISGITLINK(mode) ? OBJ_COMMIT : 403 OBJ_BLOB; 404} 405 406/* Double-check local_repo_env below if you add to this list. */ 407#define GIT_DIR_ENVIRONMENT "GIT_DIR" 408#define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR" 409#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE" 410#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE" 411#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX" 412#define GIT_SUPER_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUPER_PREFIX" 413#define DEFAULT_GIT_DIR_ENVIRONMENT ".git" 414#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" 415#define INDEX_ENVIRONMENT "GIT_INDEX_FILE" 416#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE" 417#define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE" 418#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR" 419#define CONFIG_ENVIRONMENT "GIT_CONFIG" 420#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS" 421#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH" 422#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES" 423#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS" 424#define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE" 425#define GITATTRIBUTES_FILE ".gitattributes" 426#define INFOATTRIBUTES_FILE "info/attributes" 427#define ATTRIBUTE_MACRO_PREFIX "[attr]" 428#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF" 429#define GIT_NOTES_DEFAULT_REF "refs/notes/commits" 430#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF" 431#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF" 432#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE" 433#define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS" 434#define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS" 435#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS" 436#define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS" 437#define GIT_QUARANTINE_ENVIRONMENT "GIT_QUARANTINE_PATH" 438 439/* 440 * This environment variable is expected to contain a boolean indicating 441 * whether we should or should not treat: 442 * 443 * GIT_DIR=foo.git git ... 444 * 445 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 446 * of this, but we use it internally to communicate to sub-processes that we 447 * are in a bare repo. If not set, defaults to true. 448 */ 449#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE" 450 451/* 452 * Repository-local GIT_* environment variables; these will be cleared 453 * when git spawns a sub-process that runs inside another repository. 454 * The array is NULL-terminated, which makes it easy to pass in the "env" 455 * parameter of a run-command invocation, or to do a simple walk. 456 */ 457extern const char * const local_repo_env[]; 458 459/* 460 * Returns true iff we have a configured git repository (either via 461 * setup_git_directory, or in the environment via $GIT_DIR). 462 */ 463int have_git_dir(void); 464 465extern int is_bare_repository_cfg; 466extern int is_bare_repository(void); 467extern int is_inside_git_dir(void); 468extern char *git_work_tree_cfg; 469extern int is_inside_work_tree(void); 470extern const char *get_git_dir(void); 471extern const char *get_git_common_dir(void); 472extern char *get_object_directory(void); 473extern char *get_index_file(void); 474extern char *get_graft_file(void); 475extern int set_git_dir(const char *path); 476extern int get_common_dir_noenv(struct strbuf *sb, const char *gitdir); 477extern int get_common_dir(struct strbuf *sb, const char *gitdir); 478extern const char *get_git_namespace(void); 479extern const char *strip_namespace(const char *namespaced_ref); 480extern const char *get_super_prefix(void); 481extern const char *get_git_work_tree(void); 482 483/* 484 * Return true if the given path is a git directory; note that this _just_ 485 * looks at the directory itself. If you want to know whether "foo/.git" 486 * is a repository, you must feed that path, not just "foo". 487 */ 488extern int is_git_directory(const char *path); 489 490/* 491 * Return 1 if the given path is the root of a git repository or 492 * submodule, else 0. Will not return 1 for bare repositories with the 493 * exception of creating a bare repository in "foo/.git" and calling 494 * is_git_repository("foo"). 495 * 496 * If we run into read errors, we err on the side of saying "yes, it is", 497 * as we usually consider sub-repos precious, and would prefer to err on the 498 * side of not disrupting or deleting them. 499 */ 500extern int is_nonbare_repository_dir(struct strbuf *path); 501 502#define READ_GITFILE_ERR_STAT_FAILED 1 503#define READ_GITFILE_ERR_NOT_A_FILE 2 504#define READ_GITFILE_ERR_OPEN_FAILED 3 505#define READ_GITFILE_ERR_READ_FAILED 4 506#define READ_GITFILE_ERR_INVALID_FORMAT 5 507#define READ_GITFILE_ERR_NO_PATH 6 508#define READ_GITFILE_ERR_NOT_A_REPO 7 509#define READ_GITFILE_ERR_TOO_LARGE 8 510extern const char *read_gitfile_gently(const char *path, int *return_error_code); 511#define read_gitfile(path) read_gitfile_gently((path), NULL) 512extern const char *resolve_gitdir(const char *suspect); 513extern void set_git_work_tree(const char *tree); 514 515#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" 516 517extern const char **get_pathspec(const char *prefix, const char **pathspec); 518extern void setup_work_tree(void); 519extern const char *setup_git_directory_gently(int *); 520extern const char *setup_git_directory(void); 521extern char *prefix_path(const char *prefix, int len, const char *path); 522extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path); 523extern const char *prefix_filename(const char *prefix, int len, const char *path); 524extern int check_filename(const char *prefix, const char *name); 525extern void verify_filename(const char *prefix, 526 const char *name, 527 int diagnose_misspelt_rev); 528extern void verify_non_filename(const char *prefix, const char *name); 529extern int path_inside_repo(const char *prefix, const char *path); 530 531#define INIT_DB_QUIET 0x0001 532#define INIT_DB_EXIST_OK 0x0002 533 534extern int init_db(const char *git_dir, const char *real_git_dir, 535 const char *template_dir, unsigned int flags); 536 537extern void sanitize_stdfds(void); 538extern int daemonize(void); 539 540#define alloc_nr(x) (((x)+16)*3/2) 541 542/* 543 * Realloc the buffer pointed at by variable 'x' so that it can hold 544 * at least 'nr' entries; the number of entries currently allocated 545 * is 'alloc', using the standard growing factor alloc_nr() macro. 546 * 547 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 548 */ 549#define ALLOC_GROW(x, nr, alloc) \ 550 do { \ 551 if ((nr) > alloc) { \ 552 if (alloc_nr(alloc) < (nr)) \ 553 alloc = (nr); \ 554 else \ 555 alloc = alloc_nr(alloc); \ 556 REALLOC_ARRAY(x, alloc); \ 557 } \ 558 } while (0) 559 560/* Initialize and use the cache information */ 561struct lock_file; 562extern int read_index(struct index_state *); 563extern int read_index_preload(struct index_state *, const struct pathspec *pathspec); 564extern int do_read_index(struct index_state *istate, const char *path, 565 int must_exist); /* for testting only! */ 566extern int read_index_from(struct index_state *, const char *path); 567extern int is_index_unborn(struct index_state *); 568extern int read_index_unmerged(struct index_state *); 569#define COMMIT_LOCK (1 << 0) 570#define CLOSE_LOCK (1 << 1) 571extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags); 572extern int discard_index(struct index_state *); 573extern int unmerged_index(const struct index_state *); 574extern int verify_path(const char *path); 575extern int index_dir_exists(struct index_state *istate, const char *name, int namelen); 576extern void adjust_dirname_case(struct index_state *istate, char *name); 577extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase); 578extern int index_name_pos(const struct index_state *, const char *name, int namelen); 579#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */ 580#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ 581#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ 582#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */ 583#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */ 584#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */ 585extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option); 586extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name); 587extern int remove_index_entry_at(struct index_state *, int pos); 588extern void remove_marked_cache_entries(struct index_state *istate); 589extern int remove_file_from_index(struct index_state *, const char *path); 590#define ADD_CACHE_VERBOSE 1 591#define ADD_CACHE_PRETEND 2 592#define ADD_CACHE_IGNORE_ERRORS 4 593#define ADD_CACHE_IGNORE_REMOVAL 8 594#define ADD_CACHE_INTENT 16 595extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags); 596extern int add_file_to_index(struct index_state *, const char *path, int flags); 597extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options); 598extern int chmod_index_entry(struct index_state *, struct cache_entry *ce, char flip); 599extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b); 600extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce); 601extern int index_name_is_other(const struct index_state *, const char *, int); 602extern void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *); 603 604/* do stat comparison even if CE_VALID is true */ 605#define CE_MATCH_IGNORE_VALID 01 606/* do not check the contents but report dirty on racily-clean entries */ 607#define CE_MATCH_RACY_IS_DIRTY 02 608/* do stat comparison even if CE_SKIP_WORKTREE is true */ 609#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 610/* ignore non-existent files during stat update */ 611#define CE_MATCH_IGNORE_MISSING 0x08 612/* enable stat refresh */ 613#define CE_MATCH_REFRESH 0x10 614extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); 615extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); 616 617#define HASH_WRITE_OBJECT 1 618#define HASH_FORMAT_CHECK 2 619extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags); 620extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags); 621 622/* 623 * Record to sd the data from st that we use to check whether a file 624 * might have changed. 625 */ 626extern void fill_stat_data(struct stat_data *sd, struct stat *st); 627 628/* 629 * Return 0 if st is consistent with a file not having been changed 630 * since sd was filled. If there are differences, return a 631 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 632 * INODE_CHANGED, and DATA_CHANGED. 633 */ 634extern int match_stat_data(const struct stat_data *sd, struct stat *st); 635extern int match_stat_data_racy(const struct index_state *istate, 636 const struct stat_data *sd, struct stat *st); 637 638extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); 639 640#define REFRESH_REALLY 0x0001 /* ignore_valid */ 641#define REFRESH_UNMERGED 0x0002 /* allow unmerged */ 642#define REFRESH_QUIET 0x0004 /* be quiet about it */ 643#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */ 644#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */ 645#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */ 646extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg); 647extern struct cache_entry *refresh_cache_entry(struct cache_entry *, unsigned int); 648 649extern void update_index_if_able(struct index_state *, struct lock_file *); 650 651extern int hold_locked_index(struct lock_file *, int); 652extern void set_alternate_index_output(const char *); 653 654/* Environment bits from configuration mechanism */ 655extern int trust_executable_bit; 656extern int trust_ctime; 657extern int check_stat; 658extern int quote_path_fully; 659extern int has_symlinks; 660extern int minimum_abbrev, default_abbrev; 661extern int ignore_case; 662extern int assume_unchanged; 663extern int prefer_symlink_refs; 664extern int log_all_ref_updates; 665extern int warn_ambiguous_refs; 666extern int warn_on_object_refname_ambiguity; 667extern const char *apply_default_whitespace; 668extern const char *apply_default_ignorewhitespace; 669extern const char *git_attributes_file; 670extern const char *git_hooks_path; 671extern int zlib_compression_level; 672extern int core_compression_level; 673extern int core_compression_seen; 674extern size_t packed_git_window_size; 675extern size_t packed_git_limit; 676extern size_t delta_base_cache_limit; 677extern unsigned long big_file_threshold; 678extern unsigned long pack_size_limit_cfg; 679 680/* 681 * Accessors for the core.sharedrepository config which lazy-load the value 682 * from the config (if not already set). The "reset" function can be 683 * used to unset "set" or cached value, meaning that the value will be loaded 684 * fresh from the config file on the next call to get_shared_repository(). 685 */ 686void set_shared_repository(int value); 687int get_shared_repository(void); 688void reset_shared_repository(void); 689 690/* 691 * Do replace refs need to be checked this run? This variable is 692 * initialized to true unless --no-replace-object is used or 693 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 694 * commands that do not want replace references to be active. As an 695 * optimization it is also set to false if replace references have 696 * been sought but there were none. 697 */ 698extern int check_replace_refs; 699extern char *git_replace_ref_base; 700 701extern int fsync_object_files; 702extern int core_preload_index; 703extern int core_apply_sparse_checkout; 704extern int precomposed_unicode; 705extern int protect_hfs; 706extern int protect_ntfs; 707extern int git_db_env, git_index_env, git_graft_env, git_common_dir_env; 708 709/* 710 * Include broken refs in all ref iterations, which will 711 * generally choke dangerous operations rather than letting 712 * them silently proceed without taking the broken ref into 713 * account. 714 */ 715extern int ref_paranoia; 716 717/* 718 * The character that begins a commented line in user-editable file 719 * that is subject to stripspace. 720 */ 721extern char comment_line_char; 722extern int auto_comment_line_char; 723 724/* Windows only */ 725enum hide_dotfiles_type { 726 HIDE_DOTFILES_FALSE = 0, 727 HIDE_DOTFILES_TRUE, 728 HIDE_DOTFILES_DOTGITONLY 729}; 730extern enum hide_dotfiles_type hide_dotfiles; 731 732enum branch_track { 733 BRANCH_TRACK_UNSPECIFIED = -1, 734 BRANCH_TRACK_NEVER = 0, 735 BRANCH_TRACK_REMOTE, 736 BRANCH_TRACK_ALWAYS, 737 BRANCH_TRACK_EXPLICIT, 738 BRANCH_TRACK_OVERRIDE 739}; 740 741enum rebase_setup_type { 742 AUTOREBASE_NEVER = 0, 743 AUTOREBASE_LOCAL, 744 AUTOREBASE_REMOTE, 745 AUTOREBASE_ALWAYS 746}; 747 748enum push_default_type { 749 PUSH_DEFAULT_NOTHING = 0, 750 PUSH_DEFAULT_MATCHING, 751 PUSH_DEFAULT_SIMPLE, 752 PUSH_DEFAULT_UPSTREAM, 753 PUSH_DEFAULT_CURRENT, 754 PUSH_DEFAULT_UNSPECIFIED 755}; 756 757extern enum branch_track git_branch_track; 758extern enum rebase_setup_type autorebase; 759extern enum push_default_type push_default; 760 761enum object_creation_mode { 762 OBJECT_CREATION_USES_HARDLINKS = 0, 763 OBJECT_CREATION_USES_RENAMES = 1 764}; 765 766extern enum object_creation_mode object_creation_mode; 767 768extern char *notes_ref_name; 769 770extern int grafts_replace_parents; 771 772/* 773 * GIT_REPO_VERSION is the version we write by default. The 774 * _READ variant is the highest number we know how to 775 * handle. 776 */ 777#define GIT_REPO_VERSION 0 778#define GIT_REPO_VERSION_READ 1 779extern int repository_format_precious_objects; 780 781struct repository_format { 782 int version; 783 int precious_objects; 784 int is_bare; 785 char *work_tree; 786 struct string_list unknown_extensions; 787}; 788 789/* 790 * Read the repository format characteristics from the config file "path" into 791 * "format" struct. Returns the numeric version. On error, -1 is returned, 792 * format->version is set to -1, and all other fields in the struct are 793 * undefined. 794 */ 795int read_repository_format(struct repository_format *format, const char *path); 796 797/* 798 * Verify that the repository described by repository_format is something we 799 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe 800 * any errors encountered. 801 */ 802int verify_repository_format(const struct repository_format *format, 803 struct strbuf *err); 804 805/* 806 * Check the repository format version in the path found in get_git_dir(), 807 * and die if it is a version we don't understand. Generally one would 808 * set_git_dir() before calling this, and use it only for "are we in a valid 809 * repo?". 810 */ 811extern void check_repository_format(void); 812 813#define MTIME_CHANGED 0x0001 814#define CTIME_CHANGED 0x0002 815#define OWNER_CHANGED 0x0004 816#define MODE_CHANGED 0x0008 817#define INODE_CHANGED 0x0010 818#define DATA_CHANGED 0x0020 819#define TYPE_CHANGED 0x0040 820 821/* 822 * Return a statically allocated filename, either generically (mkpath), in 823 * the repository directory (git_path), or in a submodule's repository 824 * directory (git_path_submodule). In all cases, note that the result 825 * may be overwritten by another call to _any_ of the functions. Consider 826 * using the safer "dup" or "strbuf" formats below (in some cases, the 827 * unsafe versions have already been removed). 828 */ 829extern const char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); 830extern const char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); 831extern const char *git_common_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); 832 833extern char *mksnpath(char *buf, size_t n, const char *fmt, ...) 834 __attribute__((format (printf, 3, 4))); 835extern void strbuf_git_path(struct strbuf *sb, const char *fmt, ...) 836 __attribute__((format (printf, 2, 3))); 837extern void strbuf_git_common_path(struct strbuf *sb, const char *fmt, ...) 838 __attribute__((format (printf, 2, 3))); 839extern char *git_path_buf(struct strbuf *buf, const char *fmt, ...) 840 __attribute__((format (printf, 2, 3))); 841extern int strbuf_git_path_submodule(struct strbuf *sb, const char *path, 842 const char *fmt, ...) 843 __attribute__((format (printf, 3, 4))); 844extern char *git_pathdup(const char *fmt, ...) 845 __attribute__((format (printf, 1, 2))); 846extern char *mkpathdup(const char *fmt, ...) 847 __attribute__((format (printf, 1, 2))); 848extern char *git_pathdup_submodule(const char *path, const char *fmt, ...) 849 __attribute__((format (printf, 2, 3))); 850 851extern void report_linked_checkout_garbage(void); 852 853/* 854 * You can define a static memoized git path like: 855 * 856 * static GIT_PATH_FUNC(git_path_foo, "FOO"); 857 * 858 * or use one of the global ones below. 859 */ 860#define GIT_PATH_FUNC(func, filename) \ 861 const char *func(void) \ 862 { \ 863 static char *ret; \ 864 if (!ret) \ 865 ret = git_pathdup(filename); \ 866 return ret; \ 867 } 868 869const char *git_path_cherry_pick_head(void); 870const char *git_path_revert_head(void); 871const char *git_path_squash_msg(void); 872const char *git_path_merge_msg(void); 873const char *git_path_merge_rr(void); 874const char *git_path_merge_mode(void); 875const char *git_path_merge_head(void); 876const char *git_path_fetch_head(void); 877const char *git_path_shallow(void); 878 879/* 880 * Return the name of the file in the local object database that would 881 * be used to store a loose object with the specified sha1. The 882 * return value is a pointer to a statically allocated buffer that is 883 * overwritten each time the function is called. 884 */ 885extern const char *sha1_file_name(const unsigned char *sha1); 886 887/* 888 * Return the name of the (local) packfile with the specified sha1 in 889 * its name. The return value is a pointer to memory that is 890 * overwritten each time this function is called. 891 */ 892extern char *sha1_pack_name(const unsigned char *sha1); 893 894/* 895 * Return the name of the (local) pack index file with the specified 896 * sha1 in its name. The return value is a pointer to memory that is 897 * overwritten each time this function is called. 898 */ 899extern char *sha1_pack_index_name(const unsigned char *sha1); 900 901/* 902 * Return an abbreviated sha1 unique within this repository's object database. 903 * The result will be at least `len` characters long, and will be NUL 904 * terminated. 905 * 906 * The non-`_r` version returns a static buffer which remains valid until 4 907 * more calls to find_unique_abbrev are made. 908 * 909 * The `_r` variant writes to a buffer supplied by the caller, which must be at 910 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes 911 * written (excluding the NUL terminator). 912 * 913 * Note that while this version avoids the static buffer, it is not fully 914 * reentrant, as it calls into other non-reentrant git code. 915 */ 916extern const char *find_unique_abbrev(const unsigned char *sha1, int len); 917extern int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len); 918 919extern const unsigned char null_sha1[GIT_SHA1_RAWSZ]; 920extern const struct object_id null_oid; 921 922static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) 923{ 924 int i; 925 926 for (i = 0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { 927 if (*sha1 != *sha2) 928 return *sha1 - *sha2; 929 } 930 931 return 0; 932} 933 934static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) 935{ 936 return hashcmp(oid1->hash, oid2->hash); 937} 938 939static inline int is_null_sha1(const unsigned char *sha1) 940{ 941 return !hashcmp(sha1, null_sha1); 942} 943 944static inline int is_null_oid(const struct object_id *oid) 945{ 946 return !hashcmp(oid->hash, null_sha1); 947} 948 949static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) 950{ 951 memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 952} 953 954static inline void oidcpy(struct object_id *dst, const struct object_id *src) 955{ 956 hashcpy(dst->hash, src->hash); 957} 958 959static inline void hashclr(unsigned char *hash) 960{ 961 memset(hash, 0, GIT_SHA1_RAWSZ); 962} 963 964static inline void oidclr(struct object_id *oid) 965{ 966 hashclr(oid->hash); 967} 968 969 970#define EMPTY_TREE_SHA1_HEX \ 971 "4b825dc642cb6eb9a060e54bf8d69288fbee4904" 972#define EMPTY_TREE_SHA1_BIN_LITERAL \ 973 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 974 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 975extern const struct object_id empty_tree_oid; 976#define EMPTY_TREE_SHA1_BIN (empty_tree_oid.hash) 977 978#define EMPTY_BLOB_SHA1_HEX \ 979 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 980#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 981 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 982 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 983extern const struct object_id empty_blob_oid; 984#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash) 985 986 987static inline int is_empty_blob_sha1(const unsigned char *sha1) 988{ 989 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 990} 991 992static inline int is_empty_blob_oid(const struct object_id *oid) 993{ 994 return !hashcmp(oid->hash, EMPTY_BLOB_SHA1_BIN); 995} 996 997static inline int is_empty_tree_sha1(const unsigned char *sha1) 998{ 999 return !hashcmp(sha1, EMPTY_TREE_SHA1_BIN);1000}10011002static inline int is_empty_tree_oid(const struct object_id *oid)1003{1004 return !hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN);1005}100610071008int git_mkstemp(char *path, size_t n, const char *template);10091010/* set default permissions by passing mode arguments to open(2) */1011int git_mkstemps_mode(char *pattern, int suffix_len, int mode);1012int git_mkstemp_mode(char *pattern, int mode);10131014/*1015 * NOTE NOTE NOTE!!1016 *1017 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must1018 * not be changed. Old repositories have core.sharedrepository written in1019 * numeric format, and therefore these values are preserved for compatibility1020 * reasons.1021 */1022enum sharedrepo {1023 PERM_UMASK = 0,1024 OLD_PERM_GROUP = 1,1025 OLD_PERM_EVERYBODY = 2,1026 PERM_GROUP = 0660,1027 PERM_EVERYBODY = 06641028};1029int git_config_perm(const char *var, const char *value);1030int adjust_shared_perm(const char *path);10311032/*1033 * Create the directory containing the named path, using care to be1034 * somewhat safe against races. Return one of the scld_error values1035 * to indicate success/failure.1036 *1037 * SCLD_VANISHED indicates that one of the ancestor directories of the1038 * path existed at one point during the function call and then1039 * suddenly vanished, probably because another process pruned the1040 * directory while we were working. To be robust against this kind of1041 * race, callers might want to try invoking the function again when it1042 * returns SCLD_VANISHED.1043 *1044 * safe_create_leading_directories() temporarily changes path while it1045 * is working but restores it before returning.1046 * safe_create_leading_directories_const() doesn't modify path, even1047 * temporarily.1048 */1049enum scld_error {1050 SCLD_OK = 0,1051 SCLD_FAILED = -1,1052 SCLD_PERMS = -2,1053 SCLD_EXISTS = -3,1054 SCLD_VANISHED = -41055};1056enum scld_error safe_create_leading_directories(char *path);1057enum scld_error safe_create_leading_directories_const(const char *path);10581059int mkdir_in_gitdir(const char *path);1060extern char *expand_user_path(const char *path);1061const char *enter_repo(const char *path, int strict);1062static inline int is_absolute_path(const char *path)1063{1064 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);1065}1066int is_directory(const char *);1067char *strbuf_realpath(struct strbuf *resolved, const char *path,1068 int die_on_error);1069const char *real_path(const char *path);1070const char *real_path_if_valid(const char *path);1071char *real_pathdup(const char *path);1072const char *absolute_path(const char *path);1073const char *remove_leading_path(const char *in, const char *prefix);1074const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);1075int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);1076int normalize_path_copy(char *dst, const char *src);1077int longest_ancestor_length(const char *path, struct string_list *prefixes);1078char *strip_path_suffix(const char *path, const char *suffix);1079int daemon_avoid_alias(const char *path);1080extern int is_ntfs_dotgit(const char *name);10811082/**1083 * Return a newly allocated string with the evaluation of1084 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise1085 * "$HOME/.config/git/$filename". Return NULL upon error.1086 */1087extern char *xdg_config_home(const char *filename);10881089/* object replacement */1090#define LOOKUP_REPLACE_OBJECT 11091#define LOOKUP_UNKNOWN_OBJECT 21092extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);1093static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)1094{1095 return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);1096}10971098/*1099 * This internal function is only declared here for the benefit of1100 * lookup_replace_object(). Please do not call it directly.1101 */1102extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);11031104/*1105 * If object sha1 should be replaced, return the replacement object's1106 * name (replaced recursively, if necessary). The return value is1107 * either sha1 or a pointer to a permanently-allocated value. When1108 * object replacement is suppressed, always return sha1.1109 */1110static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)1111{1112 if (!check_replace_refs)1113 return sha1;1114 return do_lookup_replace_object(sha1);1115}11161117static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag)1118{1119 if (!(flag & LOOKUP_REPLACE_OBJECT))1120 return sha1;1121 return lookup_replace_object(sha1);1122}11231124/* Read and unpack a sha1 file into memory, write memory to a sha1 file */1125extern int sha1_object_info(const unsigned char *, unsigned long *);1126extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);1127extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);1128extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, unsigned char *sha1, unsigned flags);1129extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);1130extern int force_object_loose(const unsigned char *sha1, time_t mtime);1131extern int git_open(const char *name);1132extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);1133extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);1134extern int parse_sha1_header(const char *hdr, unsigned long *sizep);11351136/* global flag to enable extra checks when accessing packed objects */1137extern int do_check_packed_object_crc;11381139extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);11401141extern int finalize_object_file(const char *tmpfile, const char *filename);11421143extern int has_sha1_pack(const unsigned char *sha1);11441145/*1146 * Return true iff we have an object named sha1, whether local or in1147 * an alternate object database, and whether packed or loose. This1148 * function does not respect replace references.1149 *1150 * If the QUICK flag is set, do not re-check the pack directory1151 * when we cannot find the object (this means we may give a false1152 * negative answer if another process is simultaneously repacking).1153 */1154#define HAS_SHA1_QUICK 0x11155extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags);1156static inline int has_sha1_file(const unsigned char *sha1)1157{1158 return has_sha1_file_with_flags(sha1, 0);1159}11601161/* Same as the above, except for struct object_id. */1162extern int has_object_file(const struct object_id *oid);1163extern int has_object_file_with_flags(const struct object_id *oid, int flags);11641165/*1166 * Return true iff an alternate object database has a loose object1167 * with the specified name. This function does not respect replace1168 * references.1169 */1170extern int has_loose_object_nonlocal(const unsigned char *sha1);11711172extern int has_pack_index(const unsigned char *sha1);11731174extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);11751176extern const signed char hexval_table[256];1177static inline unsigned int hexval(unsigned char c)1178{1179 return hexval_table[c];1180}11811182/*1183 * Convert two consecutive hexadecimal digits into a char. Return a1184 * negative value on error. Don't run over the end of short strings.1185 */1186static inline int hex2chr(const char *s)1187{1188 int val = hexval(s[0]);1189 return (val < 0) ? val : (val << 4) | hexval(s[1]);1190}11911192/* Convert to/from hex/sha1 representation */1193#define MINIMUM_ABBREV minimum_abbrev1194#define DEFAULT_ABBREV default_abbrev11951196/* used when the code does not know or care what the default abbrev is */1197#define FALLBACK_DEFAULT_ABBREV 711981199struct object_context {1200 unsigned char tree[20];1201 char path[PATH_MAX];1202 unsigned mode;1203 /*1204 * symlink_path is only used by get_tree_entry_follow_symlinks,1205 * and only for symlinks that point outside the repository.1206 */1207 struct strbuf symlink_path;1208};12091210#define GET_SHA1_QUIETLY 011211#define GET_SHA1_COMMIT 021212#define GET_SHA1_COMMITTISH 041213#define GET_SHA1_TREE 0101214#define GET_SHA1_TREEISH 0201215#define GET_SHA1_BLOB 0401216#define GET_SHA1_FOLLOW_SYMLINKS 01001217#define GET_SHA1_ONLY_TO_DIE 0400012181219#define GET_SHA1_DISAMBIGUATORS \1220 (GET_SHA1_COMMIT | GET_SHA1_COMMITTISH | \1221 GET_SHA1_TREE | GET_SHA1_TREEISH | \1222 GET_SHA1_BLOB)12231224extern int get_sha1(const char *str, unsigned char *sha1);1225extern int get_sha1_commit(const char *str, unsigned char *sha1);1226extern int get_sha1_committish(const char *str, unsigned char *sha1);1227extern int get_sha1_tree(const char *str, unsigned char *sha1);1228extern int get_sha1_treeish(const char *str, unsigned char *sha1);1229extern int get_sha1_blob(const char *str, unsigned char *sha1);1230extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);1231extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);12321233extern int get_oid(const char *str, struct object_id *oid);12341235typedef int each_abbrev_fn(const unsigned char *sha1, void *);1236extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);12371238extern int set_disambiguate_hint_config(const char *var, const char *value);12391240/*1241 * Try to read a SHA1 in hexadecimal format from the 40 characters1242 * starting at hex. Write the 20-byte result to sha1 in binary form.1243 * Return 0 on success. Reading stops if a NUL is encountered in the1244 * input, so it is safe to pass this function an arbitrary1245 * null-terminated string.1246 */1247extern int get_sha1_hex(const char *hex, unsigned char *sha1);1248extern int get_oid_hex(const char *hex, struct object_id *sha1);12491250/*1251 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,1252 * and writes the NUL-terminated output to the buffer `out`, which must be at1253 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for1254 * convenience.1255 *1256 * The non-`_r` variant returns a static buffer, but uses a ring of 41257 * buffers, making it safe to make multiple calls for a single statement, like:1258 *1259 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));1260 */1261extern char *sha1_to_hex_r(char *out, const unsigned char *sha1);1262extern char *oid_to_hex_r(char *out, const struct object_id *oid);1263extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */1264extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */12651266extern int interpret_branch_name(const char *str, int len, struct strbuf *);1267extern int get_oid_mb(const char *str, struct object_id *oid);12681269extern int validate_headref(const char *ref);12701271extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);1272extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);1273extern int name_compare(const char *name1, size_t len1, const char *name2, size_t len2);1274extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);12751276extern void *read_object_with_reference(const unsigned char *sha1,1277 const char *required_type,1278 unsigned long *size,1279 unsigned char *sha1_ret);12801281extern struct object *peel_to_type(const char *name, int namelen,1282 struct object *o, enum object_type);12831284struct date_mode {1285 enum date_mode_type {1286 DATE_NORMAL = 0,1287 DATE_RELATIVE,1288 DATE_SHORT,1289 DATE_ISO8601,1290 DATE_ISO8601_STRICT,1291 DATE_RFC2822,1292 DATE_STRFTIME,1293 DATE_RAW,1294 DATE_UNIX1295 } type;1296 const char *strftime_fmt;1297 int local;1298};12991300/*1301 * Convenience helper for passing a constant type, like:1302 *1303 * show_date(t, tz, DATE_MODE(NORMAL));1304 */1305#define DATE_MODE(t) date_mode_from_type(DATE_##t)1306struct date_mode *date_mode_from_type(enum date_mode_type type);13071308const char *show_date(unsigned long time, int timezone, const struct date_mode *mode);1309void show_date_relative(unsigned long time, int tz, const struct timeval *now,1310 struct strbuf *timebuf);1311int parse_date(const char *date, struct strbuf *out);1312int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);1313int parse_expiry_date(const char *date, unsigned long *timestamp);1314void datestamp(struct strbuf *out);1315#define approxidate(s) approxidate_careful((s), NULL)1316unsigned long approxidate_careful(const char *, int *);1317unsigned long approxidate_relative(const char *date, const struct timeval *now);1318void parse_date_format(const char *format, struct date_mode *mode);1319int date_overflows(unsigned long date);13201321#define IDENT_STRICT 11322#define IDENT_NO_DATE 21323#define IDENT_NO_NAME 41324extern const char *git_author_info(int);1325extern const char *git_committer_info(int);1326extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);1327extern const char *fmt_name(const char *name, const char *email);1328extern const char *ident_default_name(void);1329extern const char *ident_default_email(void);1330extern const char *git_editor(void);1331extern const char *git_pager(int stdout_is_tty);1332extern int git_ident_config(const char *, const char *, void *);1333extern void reset_ident_date(void);13341335struct ident_split {1336 const char *name_begin;1337 const char *name_end;1338 const char *mail_begin;1339 const char *mail_end;1340 const char *date_begin;1341 const char *date_end;1342 const char *tz_begin;1343 const char *tz_end;1344};1345/*1346 * Signals an success with 0, but time part of the result may be NULL1347 * if the input lacks timestamp and zone1348 */1349extern int split_ident_line(struct ident_split *, const char *, int);13501351/*1352 * Like show_date, but pull the timestamp and tz parameters from1353 * the ident_split. It will also sanity-check the values and produce1354 * a well-known sentinel date if they appear bogus.1355 */1356const char *show_ident_date(const struct ident_split *id,1357 const struct date_mode *mode);13581359/*1360 * Compare split idents for equality or strict ordering. Note that we1361 * compare only the ident part of the line, ignoring any timestamp.1362 *1363 * Because there are two fields, we must choose one as the primary key; we1364 * currently arbitrarily pick the email.1365 */1366extern int ident_cmp(const struct ident_split *, const struct ident_split *);13671368struct checkout {1369 struct index_state *istate;1370 const char *base_dir;1371 int base_dir_len;1372 unsigned force:1,1373 quiet:1,1374 not_new:1,1375 refresh_cache:1;1376};1377#define CHECKOUT_INIT { NULL, "" }13781379#define TEMPORARY_FILENAME_LENGTH 251380extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);13811382struct cache_def {1383 struct strbuf path;1384 int flags;1385 int track_flags;1386 int prefix_len_stat_func;1387};1388#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1389static inline void cache_def_clear(struct cache_def *cache)1390{1391 strbuf_release(&cache->path);1392}13931394extern int has_symlink_leading_path(const char *name, int len);1395extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);1396extern int check_leading_path(const char *name, int len);1397extern int has_dirs_only_path(const char *name, int len, int prefix_len);1398extern void schedule_dir_for_removal(const char *name, int len);1399extern void remove_scheduled_dirs(void);14001401extern struct alternate_object_database {1402 struct alternate_object_database *next;14031404 /* see alt_scratch_buf() */1405 struct strbuf scratch;1406 size_t base_len;14071408 char path[FLEX_ARRAY];1409} *alt_odb_list;1410extern void prepare_alt_odb(void);1411extern void read_info_alternates(const char * relative_base, int depth);1412extern char *compute_alternate_path(const char *path, struct strbuf *err);1413typedef int alt_odb_fn(struct alternate_object_database *, void *);1414extern int foreach_alt_odb(alt_odb_fn, void*);14151416/*1417 * Allocate a "struct alternate_object_database" but do _not_ actually1418 * add it to the list of alternates.1419 */1420struct alternate_object_database *alloc_alt_odb(const char *dir);14211422/*1423 * Add the directory to the on-disk alternates file; the new entry will also1424 * take effect in the current process.1425 */1426extern void add_to_alternates_file(const char *dir);14271428/*1429 * Add the directory to the in-memory list of alternates (along with any1430 * recursive alternates it points to), but do not modify the on-disk alternates1431 * file.1432 */1433extern void add_to_alternates_memory(const char *dir);14341435/*1436 * Returns a scratch strbuf pre-filled with the alternate object directory,1437 * including a trailing slash, which can be used to access paths in the1438 * alternate. Always use this over direct access to alt->scratch, as it1439 * cleans up any previous use of the scratch buffer.1440 */1441extern struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);14421443struct pack_window {1444 struct pack_window *next;1445 unsigned char *base;1446 off_t offset;1447 size_t len;1448 unsigned int last_used;1449 unsigned int inuse_cnt;1450};14511452extern struct packed_git {1453 struct packed_git *next;1454 struct pack_window *windows;1455 off_t pack_size;1456 const void *index_data;1457 size_t index_size;1458 uint32_t num_objects;1459 uint32_t num_bad_objects;1460 unsigned char *bad_object_sha1;1461 int index_version;1462 time_t mtime;1463 int pack_fd;1464 unsigned pack_local:1,1465 pack_keep:1,1466 freshened:1,1467 do_not_close:1;1468 unsigned char sha1[20];1469 struct revindex_entry *revindex;1470 /* something like ".git/objects/pack/xxxxx.pack" */1471 char pack_name[FLEX_ARRAY]; /* more */1472} *packed_git;14731474/*1475 * A most-recently-used ordered version of the packed_git list, which can1476 * be iterated instead of packed_git (and marked via mru_mark).1477 */1478struct mru;1479extern struct mru *packed_git_mru;14801481struct pack_entry {1482 off_t offset;1483 unsigned char sha1[20];1484 struct packed_git *p;1485};14861487extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);14881489/* A hook to report invalid files in pack directory */1490#define PACKDIR_FILE_PACK 11491#define PACKDIR_FILE_IDX 21492#define PACKDIR_FILE_GARBAGE 41493extern void (*report_garbage)(unsigned seen_bits, const char *path);14941495extern void prepare_packed_git(void);1496extern void reprepare_packed_git(void);1497extern void install_packed_git(struct packed_git *pack);14981499/*1500 * Give a rough count of objects in the repository. This sacrifices accuracy1501 * for speed.1502 */1503unsigned long approximate_object_count(void);15041505extern struct packed_git *find_sha1_pack(const unsigned char *sha1,1506 struct packed_git *packs);15071508extern void pack_report(void);15091510/*1511 * mmap the index file for the specified packfile (if it is not1512 * already mmapped). Return 0 on success.1513 */1514extern int open_pack_index(struct packed_git *);15151516/*1517 * munmap the index file for the specified packfile (if it is1518 * currently mmapped).1519 */1520extern void close_pack_index(struct packed_git *);15211522extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);1523extern void close_pack_windows(struct packed_git *);1524extern void close_all_packs(void);1525extern void unuse_pack(struct pack_window **);1526extern void clear_delta_base_cache(void);1527extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local);15281529/*1530 * Make sure that a pointer access into an mmap'd index file is within bounds,1531 * and can provide at least 8 bytes of data.1532 *1533 * Note that this is only necessary for variable-length segments of the file1534 * (like the 64-bit extended offset table), as we compare the size to the1535 * fixed-length parts when we open the file.1536 */1537extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr);15381539/*1540 * Return the SHA-1 of the nth object within the specified packfile.1541 * Open the index if it is not already open. The return value points1542 * at the SHA-1 within the mmapped index. Return NULL if there is an1543 * error.1544 */1545extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);15461547/*1548 * Return the offset of the nth object within the specified packfile.1549 * The index must already be opened.1550 */1551extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);15521553/*1554 * If the object named sha1 is present in the specified packfile,1555 * return its offset within the packfile; otherwise, return 0.1556 */1557extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);15581559extern int is_pack_valid(struct packed_git *);1560extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);1561extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);1562extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);1563extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);15641565/*1566 * Iterate over the files in the loose-object parts of the object1567 * directory "path", triggering the following callbacks:1568 *1569 * - loose_object is called for each loose object we find.1570 *1571 * - loose_cruft is called for any files that do not appear to be1572 * loose objects. Note that we only look in the loose object1573 * directories "objects/[0-9a-f]{2}/", so we will not report1574 * "objects/foobar" as cruft.1575 *1576 * - loose_subdir is called for each top-level hashed subdirectory1577 * of the object directory (e.g., "$OBJDIR/f0"). It is called1578 * after the objects in the directory are processed.1579 *1580 * Any callback that is NULL will be ignored. Callbacks returning non-zero1581 * will end the iteration.1582 *1583 * In the "buf" variant, "path" is a strbuf which will also be used as a1584 * scratch buffer, but restored to its original contents before1585 * the function returns.1586 */1587typedef int each_loose_object_fn(const unsigned char *sha1,1588 const char *path,1589 void *data);1590typedef int each_loose_cruft_fn(const char *basename,1591 const char *path,1592 void *data);1593typedef int each_loose_subdir_fn(int nr,1594 const char *path,1595 void *data);1596int for_each_loose_file_in_objdir(const char *path,1597 each_loose_object_fn obj_cb,1598 each_loose_cruft_fn cruft_cb,1599 each_loose_subdir_fn subdir_cb,1600 void *data);1601int for_each_loose_file_in_objdir_buf(struct strbuf *path,1602 each_loose_object_fn obj_cb,1603 each_loose_cruft_fn cruft_cb,1604 each_loose_subdir_fn subdir_cb,1605 void *data);16061607/*1608 * Iterate over loose and packed objects in both the local1609 * repository and any alternates repositories (unless the1610 * LOCAL_ONLY flag is set).1611 */1612#define FOR_EACH_OBJECT_LOCAL_ONLY 0x11613typedef int each_packed_object_fn(const unsigned char *sha1,1614 struct packed_git *pack,1615 uint32_t pos,1616 void *data);1617extern int for_each_loose_object(each_loose_object_fn, void *, unsigned flags);1618extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags);16191620struct object_info {1621 /* Request */1622 enum object_type *typep;1623 unsigned long *sizep;1624 off_t *disk_sizep;1625 unsigned char *delta_base_sha1;1626 struct strbuf *typename;16271628 /* Response */1629 enum {1630 OI_CACHED,1631 OI_LOOSE,1632 OI_PACKED,1633 OI_DBCACHED1634 } whence;1635 union {1636 /*1637 * struct {1638 * ... Nothing to expose in this case1639 * } cached;1640 * struct {1641 * ... Nothing to expose in this case1642 * } loose;1643 */1644 struct {1645 struct packed_git *pack;1646 off_t offset;1647 unsigned int is_delta;1648 } packed;1649 } u;1650};16511652/*1653 * Initializer for a "struct object_info" that wants no items. You may1654 * also memset() the memory to all-zeroes.1655 */1656#define OBJECT_INFO_INIT {NULL}16571658extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags);1659extern int packed_object_info(struct packed_git *pack, off_t offset, struct object_info *);16601661/* Dumb servers support */1662extern int update_server_info(int);16631664/* git_config_parse_key() returns these negated: */1665#define CONFIG_INVALID_KEY 11666#define CONFIG_NO_SECTION_OR_NAME 21667/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */1668#define CONFIG_NO_LOCK -11669#define CONFIG_INVALID_FILE 31670#define CONFIG_NO_WRITE 41671#define CONFIG_NOTHING_SET 51672#define CONFIG_INVALID_PATTERN 61673#define CONFIG_GENERIC_ERROR 716741675#define CONFIG_REGEX_NONE ((void *)1)16761677struct git_config_source {1678 unsigned int use_stdin:1;1679 const char *file;1680 const char *blob;1681};16821683enum config_origin_type {1684 CONFIG_ORIGIN_BLOB,1685 CONFIG_ORIGIN_FILE,1686 CONFIG_ORIGIN_STDIN,1687 CONFIG_ORIGIN_SUBMODULE_BLOB,1688 CONFIG_ORIGIN_CMDLINE1689};16901691typedef int (*config_fn_t)(const char *, const char *, void *);1692extern int git_default_config(const char *, const char *, void *);1693extern int git_config_from_file(config_fn_t fn, const char *, void *);1694extern int git_config_from_mem(config_fn_t fn, const enum config_origin_type,1695 const char *name, const char *buf, size_t len, void *data);1696extern void git_config_push_parameter(const char *text);1697extern int git_config_from_parameters(config_fn_t fn, void *data);1698extern void git_config(config_fn_t fn, void *);1699extern int git_config_with_options(config_fn_t fn, void *,1700 struct git_config_source *config_source,1701 int respect_includes);1702extern int git_parse_ulong(const char *, unsigned long *);1703extern int git_parse_maybe_bool(const char *);1704extern int git_config_int(const char *, const char *);1705extern int64_t git_config_int64(const char *, const char *);1706extern unsigned long git_config_ulong(const char *, const char *);1707extern int git_config_bool_or_int(const char *, const char *, int *);1708extern int git_config_bool(const char *, const char *);1709extern int git_config_maybe_bool(const char *, const char *);1710extern int git_config_string(const char **, const char *, const char *);1711extern int git_config_pathname(const char **, const char *, const char *);1712extern int git_config_set_in_file_gently(const char *, const char *, const char *);1713extern void git_config_set_in_file(const char *, const char *, const char *);1714extern int git_config_set_gently(const char *, const char *);1715extern void git_config_set(const char *, const char *);1716extern int git_config_parse_key(const char *, char **, int *);1717extern int git_config_key_is_valid(const char *key);1718extern int git_config_set_multivar_gently(const char *, const char *, const char *, int);1719extern void git_config_set_multivar(const char *, const char *, const char *, int);1720extern int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, int);1721extern void git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);1722extern int git_config_rename_section(const char *, const char *);1723extern int git_config_rename_section_in_file(const char *, const char *, const char *);1724extern const char *git_etc_gitconfig(void);1725extern int git_env_bool(const char *, int);1726extern unsigned long git_env_ulong(const char *, unsigned long);1727extern int git_config_system(void);1728extern int config_error_nonbool(const char *);1729#if defined(__GNUC__)1730#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1731#endif1732extern const char *get_log_output_encoding(void);1733extern const char *get_commit_output_encoding(void);17341735extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);17361737enum config_scope {1738 CONFIG_SCOPE_UNKNOWN = 0,1739 CONFIG_SCOPE_SYSTEM,1740 CONFIG_SCOPE_GLOBAL,1741 CONFIG_SCOPE_REPO,1742 CONFIG_SCOPE_CMDLINE,1743};17441745extern enum config_scope current_config_scope(void);1746extern const char *current_config_origin_type(void);1747extern const char *current_config_name(void);17481749struct config_include_data {1750 int depth;1751 config_fn_t fn;1752 void *data;1753};1754#define CONFIG_INCLUDE_INIT { 0 }1755extern int git_config_include(const char *name, const char *value, void *data);17561757/*1758 * Match and parse a config key of the form:1759 *1760 * section.(subsection.)?key1761 *1762 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1763 * we return -1 if it does not match, 0 otherwise. The subsection and key1764 * out-parameters are filled by the function (and subsection is NULL if it is1765 * missing).1766 */1767extern int parse_config_key(const char *var,1768 const char *section,1769 const char **subsection, int *subsection_len,1770 const char **key);17711772struct config_set_element {1773 struct hashmap_entry ent;1774 char *key;1775 struct string_list value_list;1776};17771778struct configset_list_item {1779 struct config_set_element *e;1780 int value_index;1781};17821783/*1784 * the contents of the list are ordered according to their1785 * position in the config files and order of parsing the files.1786 * (i.e. key-value pair at the last position of .git/config will1787 * be at the last item of the list)1788 */1789struct configset_list {1790 struct configset_list_item *items;1791 unsigned int nr, alloc;1792};17931794struct config_set {1795 struct hashmap config_hash;1796 int hash_initialized;1797 struct configset_list list;1798};17991800extern void git_configset_init(struct config_set *cs);1801extern int git_configset_add_file(struct config_set *cs, const char *filename);1802extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value);1803extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key);1804extern void git_configset_clear(struct config_set *cs);1805extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest);1806extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest);1807extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest);1808extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest);1809extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest);1810extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest);1811extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest);1812extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest);18131814extern int git_config_get_value(const char *key, const char **value);1815extern const struct string_list *git_config_get_value_multi(const char *key);1816extern void git_config_clear(void);1817extern void git_config_iter(config_fn_t fn, void *data);1818extern int git_config_get_string_const(const char *key, const char **dest);1819extern int git_config_get_string(const char *key, char **dest);1820extern int git_config_get_int(const char *key, int *dest);1821extern int git_config_get_ulong(const char *key, unsigned long *dest);1822extern int git_config_get_bool(const char *key, int *dest);1823extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest);1824extern int git_config_get_maybe_bool(const char *key, int *dest);1825extern int git_config_get_pathname(const char *key, const char **dest);1826extern int git_config_get_untracked_cache(void);18271828/*1829 * This is a hack for test programs like test-dump-untracked-cache to1830 * ensure that they do not modify the untracked cache when reading it.1831 * Do not use it otherwise!1832 */1833extern int ignore_untracked_cache_config;18341835struct key_value_info {1836 const char *filename;1837 int linenr;1838 enum config_origin_type origin_type;1839 enum config_scope scope;1840};18411842extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3)));1843extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr);18441845extern int committer_ident_sufficiently_given(void);1846extern int author_ident_sufficiently_given(void);18471848extern const char *git_commit_encoding;1849extern const char *git_log_output_encoding;1850extern const char *git_mailmap_file;1851extern const char *git_mailmap_blob;18521853/* IO helper functions */1854extern void maybe_flush_or_die(FILE *, const char *);1855__attribute__((format (printf, 2, 3)))1856extern void fprintf_or_die(FILE *, const char *fmt, ...);18571858#define COPY_READ_ERROR (-2)1859#define COPY_WRITE_ERROR (-3)1860extern int copy_fd(int ifd, int ofd);1861extern int copy_file(const char *dst, const char *src, int mode);1862extern int copy_file_with_time(const char *dst, const char *src, int mode);18631864extern void write_or_die(int fd, const void *buf, size_t count);1865extern void fsync_or_die(int fd, const char *);18661867extern ssize_t read_in_full(int fd, void *buf, size_t count);1868extern ssize_t write_in_full(int fd, const void *buf, size_t count);1869extern ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset);18701871static inline ssize_t write_str_in_full(int fd, const char *str)1872{1873 return write_in_full(fd, str, strlen(str));1874}18751876/**1877 * Open (and truncate) the file at path, write the contents of buf to it,1878 * and close it. Dies if any errors are encountered.1879 */1880extern void write_file_buf(const char *path, const char *buf, size_t len);18811882/**1883 * Like write_file_buf(), but format the contents into a buffer first.1884 * Additionally, write_file() will append a newline if one is not already1885 * present, making it convenient to write text files:1886 *1887 * write_file(path, "counter: %d", ctr);1888 */1889__attribute__((format (printf, 2, 3)))1890extern void write_file(const char *path, const char *fmt, ...);18911892/* pager.c */1893extern void setup_pager(void);1894extern int pager_in_use(void);1895extern int pager_use_color;1896extern int term_columns(void);1897extern int decimal_width(uintmax_t);1898extern int check_pager_config(const char *cmd);1899extern void prepare_pager_args(struct child_process *, const char *pager);19001901extern const char *editor_program;1902extern const char *askpass_program;1903extern const char *excludes_file;19041905/* base85 */1906int decode_85(char *dst, const char *line, int linelen);1907void encode_85(char *buf, const unsigned char *data, int bytes);19081909/* alloc.c */1910extern void *alloc_blob_node(void);1911extern void *alloc_tree_node(void);1912extern void *alloc_commit_node(void);1913extern void *alloc_tag_node(void);1914extern void *alloc_object_node(void);1915extern void alloc_report(void);1916extern unsigned int alloc_commit_index(void);19171918/* pkt-line.c */1919void packet_trace_identity(const char *prog);19201921/* add */1922/*1923 * return 0 if success, 1 - if addition of a file failed and1924 * ADD_FILES_IGNORE_ERRORS was specified in flags1925 */1926int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags);19271928/* diff.c */1929extern int diff_auto_refresh_index;19301931/* match-trees.c */1932void shift_tree(const struct object_id *, const struct object_id *, struct object_id *, int);1933void shift_tree_by(const struct object_id *, const struct object_id *, struct object_id *, const char *);19341935/*1936 * whitespace rules.1937 * used by both diff and apply1938 * last two digits are tab width1939 */1940#define WS_BLANK_AT_EOL 01001941#define WS_SPACE_BEFORE_TAB 02001942#define WS_INDENT_WITH_NON_TAB 04001943#define WS_CR_AT_EOL 010001944#define WS_BLANK_AT_EOF 020001945#define WS_TAB_IN_INDENT 040001946#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1947#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1948#define WS_TAB_WIDTH_MASK 0771949extern unsigned whitespace_rule_cfg;1950extern unsigned whitespace_rule(const char *);1951extern unsigned parse_whitespace_rule(const char *);1952extern unsigned ws_check(const char *line, int len, unsigned ws_rule);1953extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);1954extern char *whitespace_error_string(unsigned ws);1955extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);1956extern int ws_blank_line(const char *line, int len, unsigned ws_rule);1957#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)19581959/* ls-files */1960void overlay_tree_on_cache(const char *tree_name, const char *prefix);19611962char *alias_lookup(const char *alias);1963int split_cmdline(char *cmdline, const char ***argv);1964/* Takes a negative value returned by split_cmdline */1965const char *split_cmdline_strerror(int cmdline_errno);19661967/* setup.c */1968struct startup_info {1969 int have_repository;1970 const char *prefix;1971};1972extern struct startup_info *startup_info;19731974/* merge.c */1975struct commit_list;1976int try_merge_command(const char *strategy, size_t xopts_nr,1977 const char **xopts, struct commit_list *common,1978 const char *head_arg, struct commit_list *remotes);1979int checkout_fast_forward(const unsigned char *from,1980 const unsigned char *to,1981 int overwrite_ignore);198219831984int sane_execvp(const char *file, char *const argv[]);19851986/*1987 * A struct to encapsulate the concept of whether a file has changed1988 * since we last checked it. This uses criteria similar to those used1989 * for the index.1990 */1991struct stat_validity {1992 struct stat_data *sd;1993};19941995void stat_validity_clear(struct stat_validity *sv);19961997/*1998 * Returns 1 if the path is a regular file (or a symlink to a regular1999 * file) and matches the saved stat_validity, 0 otherwise. A missing2000 * or inaccessible file is considered a match if the struct was just2001 * initialized, or if the previous update found an inaccessible file.2002 */2003int stat_validity_check(struct stat_validity *sv, const char *path);20042005/*2006 * Update the stat_validity from a file opened at descriptor fd. If2007 * the file is missing, inaccessible, or not a regular file, then2008 * future calls to stat_validity_check will match iff one of those2009 * conditions continues to be true.2010 */2011void stat_validity_update(struct stat_validity *sv, int fd);20122013int versioncmp(const char *s1, const char *s2);2014void sleep_millisec(int millisec);20152016/*2017 * Create a directory and (if share is nonzero) adjust its permissions2018 * according to the shared_repository setting. Only use this for2019 * directories under $GIT_DIR. Don't use it for working tree2020 * directories.2021 */2022void safe_create_dir(const char *dir, int share);20232024#endif /* CACHE_H */