Andrew's git - gitweb.git/blob

   1#ifndef CACHE_H
   2#define CACHE_H
   3
   4#include "git-compat-util.h"
   5#include "strbuf.h"
   6#include "hash.h"
   7#include "advice.h"
   8
   9#include SHA1_HEADER
  10#ifndef git_SHA_CTX
  11#define git_SHA_CTX     SHA_CTX
  12#define git_SHA1_Init   SHA1_Init
  13#define git_SHA1_Update SHA1_Update
  14#define git_SHA1_Final  SHA1_Final
  15#endif
  16
  17#include <zlib.h>
  18#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
  19#define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
  20#endif
  21
  22void git_inflate_init(z_streamp strm);
  23void git_inflate_end(z_streamp strm);
  24int git_inflate(z_streamp strm, int flush);
  25
  26#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  27#define DTYPE(de)       ((de)->d_type)
  28#else
  29#undef DT_UNKNOWN
  30#undef DT_DIR
  31#undef DT_REG
  32#undef DT_LNK
  33#define DT_UNKNOWN      0
  34#define DT_DIR          1
  35#define DT_REG          2
  36#define DT_LNK          3
  37#define DTYPE(de)       DT_UNKNOWN
  38#endif
  39
  40/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  41#define S_IFINVALID     0030000
  42
  43/*
  44 * A "directory link" is a link to another git directory.
  45 *
  46 * The value 0160000 is not normally a valid mode, and
  47 * also just happens to be S_IFDIR + S_IFLNK
  48 *
  49 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  50 * always having the same values everywhere. We should use
  51 * our internal git values for these things, and then we can
  52 * translate that to the OS-specific value. It just so
  53 * happens that everybody shares the same bit representation
  54 * in the UNIX world (and apparently wider too..)
  55 */
  56#define S_IFGITLINK     0160000
  57#define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  58
  59/*
  60 * Intensive research over the course of many years has shown that
  61 * port 9418 is totally unused by anything else. Or
  62 *
  63 *      Your search - "port 9418" - did not match any documents.
  64 *
  65 * as www.google.com puts it.
  66 *
  67 * This port has been properly assigned for git use by IANA:
  68 * git (Assigned-9418) [I06-050728-0001].
  69 *
  70 *      git  9418/tcp   git pack transfer service
  71 *      git  9418/udp   git pack transfer service
  72 *
  73 * with Linus Torvalds <torvalds@osdl.org> as the point of
  74 * contact. September 2005.
  75 *
  76 * See http://www.iana.org/assignments/port-numbers
  77 */
  78#define DEFAULT_GIT_PORT 9418
  79
  80/*
  81 * Basic data structures for the directory cache
  82 */
  83
  84#define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
  85struct cache_header {
  86        unsigned int hdr_signature;
  87        unsigned int hdr_version;
  88        unsigned int hdr_entries;
  89};
  90
  91/*
  92 * The "cache_time" is just the low 32 bits of the
  93 * time. It doesn't matter if it overflows - we only
  94 * check it for equality in the 32 bits we save.
  95 */
  96struct cache_time {
  97        unsigned int sec;
  98        unsigned int nsec;
  99};
 100
 101/*
 102 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
 103 * Again - this is just a (very strong in practice) heuristic that
 104 * the inode hasn't changed.
 105 *
 106 * We save the fields in big-endian order to allow using the
 107 * index file over NFS transparently.
 108 */
 109struct ondisk_cache_entry {
 110        struct cache_time ctime;
 111        struct cache_time mtime;
 112        unsigned int dev;
 113        unsigned int ino;
 114        unsigned int mode;
 115        unsigned int uid;
 116        unsigned int gid;
 117        unsigned int size;
 118        unsigned char sha1[20];
 119        unsigned short flags;
 120        char name[FLEX_ARRAY]; /* more */
 121};
 122
 123/*
 124 * This struct is used when CE_EXTENDED bit is 1
 125 * The struct must match ondisk_cache_entry exactly from
 126 * ctime till flags
 127 */
 128struct ondisk_cache_entry_extended {
 129        struct cache_time ctime;
 130        struct cache_time mtime;
 131        unsigned int dev;
 132        unsigned int ino;
 133        unsigned int mode;
 134        unsigned int uid;
 135        unsigned int gid;
 136        unsigned int size;
 137        unsigned char sha1[20];
 138        unsigned short flags;
 139        unsigned short flags2;
 140        char name[FLEX_ARRAY]; /* more */
 141};
 142
 143struct cache_entry {
 144        struct cache_time ce_ctime;
 145        struct cache_time ce_mtime;
 146        unsigned int ce_dev;
 147        unsigned int ce_ino;
 148        unsigned int ce_mode;
 149        unsigned int ce_uid;
 150        unsigned int ce_gid;
 151        unsigned int ce_size;
 152        unsigned int ce_flags;
 153        unsigned char sha1[20];
 154        struct cache_entry *next;
 155        char name[FLEX_ARRAY]; /* more */
 156};
 157
 158#define CE_NAMEMASK  (0x0fff)
 159#define CE_STAGEMASK (0x3000)
 160#define CE_EXTENDED  (0x4000)
 161#define CE_VALID     (0x8000)
 162#define CE_STAGESHIFT 12
 163
 164/*
 165 * Range 0xFFFF0000 in ce_flags is divided into
 166 * two parts: in-memory flags and on-disk ones.
 167 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 168 * if you want to save a new flag, add it in
 169 * CE_EXTENDED_FLAGS
 170 *
 171 * In-memory only flags
 172 */
 173#define CE_UPDATE    (0x10000)
 174#define CE_REMOVE    (0x20000)
 175#define CE_UPTODATE  (0x40000)
 176#define CE_ADDED     (0x80000)
 177
 178#define CE_HASHED    (0x100000)
 179#define CE_UNHASHED  (0x200000)
 180#define CE_CONFLICTED (0x800000)
 181
 182/* Only remove in work directory, not index */
 183#define CE_WT_REMOVE (0x400000)
 184
 185#define CE_UNPACKED  (0x1000000)
 186
 187/*
 188 * Extended on-disk flags
 189 */
 190#define CE_INTENT_TO_ADD 0x20000000
 191#define CE_SKIP_WORKTREE 0x40000000
 192/* CE_EXTENDED2 is for future extension */
 193#define CE_EXTENDED2 0x80000000
 194
 195#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 196
 197/*
 198 * Safeguard to avoid saving wrong flags:
 199 *  - CE_EXTENDED2 won't get saved until its semantic is known
 200 *  - Bits in 0x0000FFFF have been saved in ce_flags already
 201 *  - Bits in 0x003F0000 are currently in-memory flags
 202 */
 203#if CE_EXTENDED_FLAGS & 0x803FFFFF
 204#error "CE_EXTENDED_FLAGS out of range"
 205#endif
 206
 207/*
 208 * Copy the sha1 and stat state of a cache entry from one to
 209 * another. But we never change the name, or the hash state!
 210 */
 211#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 212static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 213{
 214        unsigned int state = dst->ce_flags & CE_STATE_MASK;
 215
 216        /* Don't copy hash chain and name */
 217        memcpy(dst, src, offsetof(struct cache_entry, next));
 218
 219        /* Restore the hash state */
 220        dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 221}
 222
 223static inline unsigned create_ce_flags(size_t len, unsigned stage)
 224{
 225        if (len >= CE_NAMEMASK)
 226                len = CE_NAMEMASK;
 227        return (len | (stage << CE_STAGESHIFT));
 228}
 229
 230static inline size_t ce_namelen(const struct cache_entry *ce)
 231{
 232        size_t len = ce->ce_flags & CE_NAMEMASK;
 233        if (len < CE_NAMEMASK)
 234                return len;
 235        return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 236}
 237
 238#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 239#define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
 240                            ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
 241                            ondisk_cache_entry_size(ce_namelen(ce)))
 242#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 243#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 244#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 245#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 246
 247#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 248static inline unsigned int create_ce_mode(unsigned int mode)
 249{
 250        if (S_ISLNK(mode))
 251                return S_IFLNK;
 252        if (S_ISDIR(mode) || S_ISGITLINK(mode))
 253                return S_IFGITLINK;
 254        return S_IFREG | ce_permissions(mode);
 255}
 256static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 257{
 258        extern int trust_executable_bit, has_symlinks;
 259        if (!has_symlinks && S_ISREG(mode) &&
 260            ce && S_ISLNK(ce->ce_mode))
 261                return ce->ce_mode;
 262        if (!trust_executable_bit && S_ISREG(mode)) {
 263                if (ce && S_ISREG(ce->ce_mode))
 264                        return ce->ce_mode;
 265                return create_ce_mode(0666);
 266        }
 267        return create_ce_mode(mode);
 268}
 269static inline int ce_to_dtype(const struct cache_entry *ce)
 270{
 271        unsigned ce_mode = ntohl(ce->ce_mode);
 272        if (S_ISREG(ce_mode))
 273                return DT_REG;
 274        else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 275                return DT_DIR;
 276        else if (S_ISLNK(ce_mode))
 277                return DT_LNK;
 278        else
 279                return DT_UNKNOWN;
 280}
 281#define canon_mode(mode) \
 282        (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
 283        S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
 284
 285#define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
 286#define cache_entry_size(len) flexible_size(cache_entry,len)
 287#define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 288#define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 289
 290struct index_state {
 291        struct cache_entry **cache;
 292        unsigned int cache_nr, cache_alloc, cache_changed;
 293        struct string_list *resolve_undo;
 294        struct cache_tree *cache_tree;
 295        struct cache_time timestamp;
 296        void *alloc;
 297        unsigned name_hash_initialized : 1,
 298                 initialized : 1;
 299        struct hash_table name_hash;
 300};
 301
 302extern struct index_state the_index;
 303
 304/* Name hashing */
 305extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 306/*
 307 * We don't actually *remove* it, we can just mark it invalid so that
 308 * we won't find it in lookups.
 309 *
 310 * Not only would we have to search the lists (simple enough), but
 311 * we'd also have to rehash other hash buckets in case this makes the
 312 * hash bucket empty (common). So it's much better to just mark
 313 * it.
 314 */
 315static inline void remove_name_hash(struct cache_entry *ce)
 316{
 317        ce->ce_flags |= CE_UNHASHED;
 318}
 319
 320
 321#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 322#define active_cache (the_index.cache)
 323#define active_nr (the_index.cache_nr)
 324#define active_alloc (the_index.cache_alloc)
 325#define active_cache_changed (the_index.cache_changed)
 326#define active_cache_tree (the_index.cache_tree)
 327
 328#define read_cache() read_index(&the_index)
 329#define read_cache_from(path) read_index_from(&the_index, (path))
 330#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 331#define is_cache_unborn() is_index_unborn(&the_index)
 332#define read_cache_unmerged() read_index_unmerged(&the_index)
 333#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 334#define discard_cache() discard_index(&the_index)
 335#define unmerged_cache() unmerged_index(&the_index)
 336#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 337#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 338#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 339#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 340#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 341#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 342#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 343#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 344#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 345#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 346#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 347#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 348#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 349#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 350#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 351#endif
 352
 353enum object_type {
 354        OBJ_BAD = -1,
 355        OBJ_NONE = 0,
 356        OBJ_COMMIT = 1,
 357        OBJ_TREE = 2,
 358        OBJ_BLOB = 3,
 359        OBJ_TAG = 4,
 360        /* 5 for future expansion */
 361        OBJ_OFS_DELTA = 6,
 362        OBJ_REF_DELTA = 7,
 363        OBJ_ANY,
 364        OBJ_MAX
 365};
 366
 367static inline enum object_type object_type(unsigned int mode)
 368{
 369        return S_ISDIR(mode) ? OBJ_TREE :
 370                S_ISGITLINK(mode) ? OBJ_COMMIT :
 371                OBJ_BLOB;
 372}
 373
 374#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 375#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 376#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 377#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 378#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 379#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 380#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 381#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 382#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 383#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 384#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 385#define GITATTRIBUTES_FILE ".gitattributes"
 386#define INFOATTRIBUTES_FILE "info/attributes"
 387#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 388#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 389#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 390#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 391#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 392#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 393
 394/*
 395 * Repository-local GIT_* environment variables
 396 * The array is NULL-terminated to simplify its usage in contexts such
 397 * environment creation or simple walk of the list.
 398 * The number of non-NULL entries is available as a macro.
 399 */
 400#define LOCAL_REPO_ENV_SIZE 8
 401extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 402
 403extern int is_bare_repository_cfg;
 404extern int is_bare_repository(void);
 405extern int is_inside_git_dir(void);
 406extern char *git_work_tree_cfg;
 407extern int is_inside_work_tree(void);
 408extern int have_git_dir(void);
 409extern const char *get_git_dir(void);
 410extern char *get_object_directory(void);
 411extern char *get_index_file(void);
 412extern char *get_graft_file(void);
 413extern int set_git_dir(const char *path);
 414extern const char *get_git_work_tree(void);
 415extern const char *read_gitfile_gently(const char *path);
 416extern void set_git_work_tree(const char *tree);
 417
 418#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 419
 420extern const char **get_pathspec(const char *prefix, const char **pathspec);
 421extern void setup_work_tree(void);
 422extern const char *setup_git_directory_gently(int *);
 423extern const char *setup_git_directory(void);
 424extern const char *prefix_path(const char *prefix, int len, const char *path);
 425extern const char *prefix_filename(const char *prefix, int len, const char *path);
 426extern int check_filename(const char *prefix, const char *name);
 427extern void verify_filename(const char *prefix, const char *name);
 428extern void verify_non_filename(const char *prefix, const char *name);
 429
 430#define INIT_DB_QUIET 0x0001
 431
 432extern int init_db(const char *template_dir, unsigned int flags);
 433
 434#define alloc_nr(x) (((x)+16)*3/2)
 435
 436/*
 437 * Realloc the buffer pointed at by variable 'x' so that it can hold
 438 * at least 'nr' entries; the number of entries currently allocated
 439 * is 'alloc', using the standard growing factor alloc_nr() macro.
 440 *
 441 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
 442 */
 443#define ALLOC_GROW(x, nr, alloc) \
 444        do { \
 445                if ((nr) > alloc) { \
 446                        if (alloc_nr(alloc) < (nr)) \
 447                                alloc = (nr); \
 448                        else \
 449                                alloc = alloc_nr(alloc); \
 450                        x = xrealloc((x), alloc * sizeof(*(x))); \
 451                } \
 452        } while(0)
 453
 454/* Initialize and use the cache information */
 455extern int read_index(struct index_state *);
 456extern int read_index_preload(struct index_state *, const char **pathspec);
 457extern int read_index_from(struct index_state *, const char *path);
 458extern int is_index_unborn(struct index_state *);
 459extern int read_index_unmerged(struct index_state *);
 460extern int write_index(struct index_state *, int newfd);
 461extern int discard_index(struct index_state *);
 462extern int unmerged_index(const struct index_state *);
 463extern int verify_path(const char *path);
 464extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 465extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 466#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 467#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 468#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 469#define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 470#define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 471extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 472extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 473extern int remove_index_entry_at(struct index_state *, int pos);
 474extern void remove_marked_cache_entries(struct index_state *istate);
 475extern int remove_file_from_index(struct index_state *, const char *path);
 476#define ADD_CACHE_VERBOSE 1
 477#define ADD_CACHE_PRETEND 2
 478#define ADD_CACHE_IGNORE_ERRORS 4
 479#define ADD_CACHE_IGNORE_REMOVAL 8
 480#define ADD_CACHE_INTENT 16
 481extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 482extern int add_file_to_index(struct index_state *, const char *path, int flags);
 483extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 484extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 485extern int index_name_is_other(const struct index_state *, const char *, int);
 486
 487/* do stat comparison even if CE_VALID is true */
 488#define CE_MATCH_IGNORE_VALID           01
 489/* do not check the contents but report dirty on racily-clean entries */
 490#define CE_MATCH_RACY_IS_DIRTY          02
 491/* do stat comparison even if CE_SKIP_WORKTREE is true */
 492#define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 493extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 494extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 495
 496extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 497extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 498extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 499extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 500
 501#define REFRESH_REALLY          0x0001  /* ignore_valid */
 502#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 503#define REFRESH_QUIET           0x0004  /* be quiet about it */
 504#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 505#define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 506#define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 507extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, char *header_msg);
 508
 509struct lock_file {
 510        struct lock_file *next;
 511        int fd;
 512        pid_t owner;
 513        char on_list;
 514        char filename[PATH_MAX];
 515};
 516#define LOCK_DIE_ON_ERROR 1
 517#define LOCK_NODEREF 2
 518extern int unable_to_lock_error(const char *path, int err);
 519extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 520extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 521extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 522extern int commit_lock_file(struct lock_file *);
 523
 524extern int hold_locked_index(struct lock_file *, int);
 525extern int commit_locked_index(struct lock_file *);
 526extern void set_alternate_index_output(const char *);
 527extern int close_lock_file(struct lock_file *);
 528extern void rollback_lock_file(struct lock_file *);
 529extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 530
 531/* Environment bits from configuration mechanism */
 532extern int trust_executable_bit;
 533extern int trust_ctime;
 534extern int quote_path_fully;
 535extern int has_symlinks;
 536extern int ignore_case;
 537extern int assume_unchanged;
 538extern int prefer_symlink_refs;
 539extern int log_all_ref_updates;
 540extern int warn_ambiguous_refs;
 541extern int shared_repository;
 542extern const char *apply_default_whitespace;
 543extern const char *apply_default_ignorewhitespace;
 544extern int zlib_compression_level;
 545extern int core_compression_level;
 546extern int core_compression_seen;
 547extern size_t packed_git_window_size;
 548extern size_t packed_git_limit;
 549extern size_t delta_base_cache_limit;
 550extern int read_replace_refs;
 551extern int fsync_object_files;
 552extern int core_preload_index;
 553extern int core_apply_sparse_checkout;
 554
 555enum safe_crlf {
 556        SAFE_CRLF_FALSE = 0,
 557        SAFE_CRLF_FAIL = 1,
 558        SAFE_CRLF_WARN = 2
 559};
 560
 561extern enum safe_crlf safe_crlf;
 562
 563enum auto_crlf {
 564        AUTO_CRLF_FALSE = 0,
 565        AUTO_CRLF_TRUE = 1,
 566        AUTO_CRLF_INPUT = -1,
 567};
 568
 569extern enum auto_crlf auto_crlf;
 570
 571enum eol {
 572        EOL_UNSET,
 573        EOL_CRLF,
 574        EOL_LF,
 575#ifdef NATIVE_CRLF
 576        EOL_NATIVE = EOL_CRLF
 577#else
 578        EOL_NATIVE = EOL_LF
 579#endif
 580};
 581
 582extern enum eol eol;
 583
 584enum branch_track {
 585        BRANCH_TRACK_UNSPECIFIED = -1,
 586        BRANCH_TRACK_NEVER = 0,
 587        BRANCH_TRACK_REMOTE,
 588        BRANCH_TRACK_ALWAYS,
 589        BRANCH_TRACK_EXPLICIT,
 590        BRANCH_TRACK_OVERRIDE
 591};
 592
 593enum rebase_setup_type {
 594        AUTOREBASE_NEVER = 0,
 595        AUTOREBASE_LOCAL,
 596        AUTOREBASE_REMOTE,
 597        AUTOREBASE_ALWAYS
 598};
 599
 600enum push_default_type {
 601        PUSH_DEFAULT_NOTHING = 0,
 602        PUSH_DEFAULT_MATCHING,
 603        PUSH_DEFAULT_TRACKING,
 604        PUSH_DEFAULT_CURRENT
 605};
 606
 607extern enum branch_track git_branch_track;
 608extern enum rebase_setup_type autorebase;
 609extern enum push_default_type push_default;
 610
 611enum object_creation_mode {
 612        OBJECT_CREATION_USES_HARDLINKS = 0,
 613        OBJECT_CREATION_USES_RENAMES = 1
 614};
 615
 616extern enum object_creation_mode object_creation_mode;
 617
 618extern char *notes_ref_name;
 619
 620extern int grafts_replace_parents;
 621
 622#define GIT_REPO_VERSION 0
 623extern int repository_format_version;
 624extern int check_repository_format(void);
 625
 626#define MTIME_CHANGED   0x0001
 627#define CTIME_CHANGED   0x0002
 628#define OWNER_CHANGED   0x0004
 629#define MODE_CHANGED    0x0008
 630#define INODE_CHANGED   0x0010
 631#define DATA_CHANGED    0x0020
 632#define TYPE_CHANGED    0x0040
 633
 634extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 635        __attribute__((format (printf, 3, 4)));
 636extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 637        __attribute__((format (printf, 3, 4)));
 638extern char *git_pathdup(const char *fmt, ...)
 639        __attribute__((format (printf, 1, 2)));
 640
 641/* Return a statically allocated filename matching the sha1 signature */
 642extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 643extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 644extern char *sha1_file_name(const unsigned char *sha1);
 645extern char *sha1_pack_name(const unsigned char *sha1);
 646extern char *sha1_pack_index_name(const unsigned char *sha1);
 647extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 648extern const unsigned char null_sha1[20];
 649static inline int is_null_sha1(const unsigned char *sha1)
 650{
 651        return !memcmp(sha1, null_sha1, 20);
 652}
 653static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 654{
 655        return memcmp(sha1, sha2, 20);
 656}
 657static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 658{
 659        memcpy(sha_dst, sha_src, 20);
 660}
 661static inline void hashclr(unsigned char *hash)
 662{
 663        memset(hash, 0, 20);
 664}
 665
 666#define EMPTY_TREE_SHA1_HEX \
 667        "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 668#define EMPTY_TREE_SHA1_BIN \
 669         "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 670         "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 671
 672int git_mkstemp(char *path, size_t n, const char *template);
 673
 674int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 675
 676/* set default permissions by passing mode arguments to open(2) */
 677int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 678int git_mkstemp_mode(char *pattern, int mode);
 679
 680/*
 681 * NOTE NOTE NOTE!!
 682 *
 683 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 684 * not be changed. Old repositories have core.sharedrepository written in
 685 * numeric format, and therefore these values are preserved for compatibility
 686 * reasons.
 687 */
 688enum sharedrepo {
 689        PERM_UMASK          = 0,
 690        OLD_PERM_GROUP      = 1,
 691        OLD_PERM_EVERYBODY  = 2,
 692        PERM_GROUP          = 0660,
 693        PERM_EVERYBODY      = 0664
 694};
 695int git_config_perm(const char *var, const char *value);
 696int set_shared_perm(const char *path, int mode);
 697#define adjust_shared_perm(path) set_shared_perm((path), 0)
 698int safe_create_leading_directories(char *path);
 699int safe_create_leading_directories_const(const char *path);
 700extern char *expand_user_path(const char *path);
 701char *enter_repo(char *path, int strict);
 702static inline int is_absolute_path(const char *path)
 703{
 704        return path[0] == '/' || has_dos_drive_prefix(path);
 705}
 706int is_directory(const char *);
 707const char *make_absolute_path(const char *path);
 708const char *make_nonrelative_path(const char *path);
 709const char *make_relative_path(const char *abs, const char *base);
 710int normalize_path_copy(char *dst, const char *src);
 711int longest_ancestor_length(const char *path, const char *prefix_list);
 712char *strip_path_suffix(const char *path, const char *suffix);
 713int daemon_avoid_alias(const char *path);
 714int offset_1st_component(const char *path);
 715
 716/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 717extern int sha1_object_info(const unsigned char *, unsigned long *);
 718extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
 719static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 720{
 721        return read_sha1_file_repl(sha1, type, size, NULL);
 722}
 723extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 724extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 725extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 726extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 727
 728/* global flag to enable extra checks when accessing packed objects */
 729extern int do_check_packed_object_crc;
 730
 731extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 732
 733extern int move_temp_to_file(const char *tmpfile, const char *filename);
 734
 735extern int has_sha1_pack(const unsigned char *sha1);
 736extern int has_sha1_file(const unsigned char *sha1);
 737extern int has_loose_object_nonlocal(const unsigned char *sha1);
 738
 739extern int has_pack_index(const unsigned char *sha1);
 740
 741extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 742
 743extern const signed char hexval_table[256];
 744static inline unsigned int hexval(unsigned char c)
 745{
 746        return hexval_table[c];
 747}
 748
 749/* Convert to/from hex/sha1 representation */
 750#define MINIMUM_ABBREV 4
 751#define DEFAULT_ABBREV 7
 752
 753struct object_context {
 754        unsigned char tree[20];
 755        char path[PATH_MAX];
 756        unsigned mode;
 757};
 758
 759extern int get_sha1(const char *str, unsigned char *sha1);
 760extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
 761static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 762{
 763        return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
 764}
 765extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
 766static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 767{
 768        return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
 769}
 770extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 771extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 772extern int read_ref(const char *filename, unsigned char *sha1);
 773extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 774extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 775extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 776extern int interpret_branch_name(const char *str, struct strbuf *);
 777extern int get_sha1_mb(const char *str, unsigned char *sha1);
 778
 779extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 780extern const char *ref_rev_parse_rules[];
 781extern const char *ref_fetch_rules[];
 782
 783extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 784extern int validate_headref(const char *ref);
 785
 786extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 787extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 788extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 789
 790extern void *read_object_with_reference(const unsigned char *sha1,
 791                                        const char *required_type,
 792                                        unsigned long *size,
 793                                        unsigned char *sha1_ret);
 794
 795extern struct object *peel_to_type(const char *name, int namelen,
 796                                   struct object *o, enum object_type);
 797
 798enum date_mode {
 799        DATE_NORMAL = 0,
 800        DATE_RELATIVE,
 801        DATE_SHORT,
 802        DATE_LOCAL,
 803        DATE_ISO8601,
 804        DATE_RFC2822,
 805        DATE_RAW
 806};
 807
 808const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 809const char *show_date_relative(unsigned long time, int tz,
 810                               const struct timeval *now,
 811                               char *timebuf,
 812                               size_t timebuf_size);
 813int parse_date(const char *date, char *buf, int bufsize);
 814void datestamp(char *buf, int bufsize);
 815#define approxidate(s) approxidate_careful((s), NULL)
 816unsigned long approxidate_careful(const char *, int *);
 817unsigned long approxidate_relative(const char *date, const struct timeval *now);
 818enum date_mode parse_date_format(const char *format);
 819
 820#define IDENT_WARN_ON_NO_NAME  1
 821#define IDENT_ERROR_ON_NO_NAME 2
 822#define IDENT_NO_DATE          4
 823extern const char *git_author_info(int);
 824extern const char *git_committer_info(int);
 825extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 826extern const char *fmt_name(const char *name, const char *email);
 827extern const char *git_editor(void);
 828extern const char *git_pager(int stdout_is_tty);
 829
 830struct checkout {
 831        const char *base_dir;
 832        int base_dir_len;
 833        unsigned force:1,
 834                 quiet:1,
 835                 not_new:1,
 836                 refresh_cache:1;
 837};
 838
 839extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 840
 841struct cache_def {
 842        char path[PATH_MAX + 1];
 843        int len;
 844        int flags;
 845        int track_flags;
 846        int prefix_len_stat_func;
 847};
 848
 849extern int has_symlink_leading_path(const char *name, int len);
 850extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 851extern int has_symlink_or_noent_leading_path(const char *name, int len);
 852extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 853extern void schedule_dir_for_removal(const char *name, int len);
 854extern void remove_scheduled_dirs(void);
 855
 856extern struct alternate_object_database {
 857        struct alternate_object_database *next;
 858        char *name;
 859        char base[FLEX_ARRAY]; /* more */
 860} *alt_odb_list;
 861extern void prepare_alt_odb(void);
 862extern void add_to_alternates_file(const char *reference);
 863typedef int alt_odb_fn(struct alternate_object_database *, void *);
 864extern void foreach_alt_odb(alt_odb_fn, void*);
 865
 866struct pack_window {
 867        struct pack_window *next;
 868        unsigned char *base;
 869        off_t offset;
 870        size_t len;
 871        unsigned int last_used;
 872        unsigned int inuse_cnt;
 873};
 874
 875extern struct packed_git {
 876        struct packed_git *next;
 877        struct pack_window *windows;
 878        off_t pack_size;
 879        const void *index_data;
 880        size_t index_size;
 881        uint32_t num_objects;
 882        uint32_t num_bad_objects;
 883        unsigned char *bad_object_sha1;
 884        int index_version;
 885        time_t mtime;
 886        int pack_fd;
 887        unsigned pack_local:1,
 888                 pack_keep:1;
 889        unsigned char sha1[20];
 890        /* something like ".git/objects/pack/xxxxx.pack" */
 891        char pack_name[FLEX_ARRAY]; /* more */
 892} *packed_git;
 893
 894struct pack_entry {
 895        off_t offset;
 896        unsigned char sha1[20];
 897        struct packed_git *p;
 898};
 899
 900struct ref {
 901        struct ref *next;
 902        unsigned char old_sha1[20];
 903        unsigned char new_sha1[20];
 904        char *symref;
 905        unsigned int force:1,
 906                merge:1,
 907                nonfastforward:1,
 908                deletion:1;
 909        enum {
 910                REF_STATUS_NONE = 0,
 911                REF_STATUS_OK,
 912                REF_STATUS_REJECT_NONFASTFORWARD,
 913                REF_STATUS_REJECT_NODELETE,
 914                REF_STATUS_UPTODATE,
 915                REF_STATUS_REMOTE_REJECT,
 916                REF_STATUS_EXPECTING_REPORT
 917        } status;
 918        char *remote_status;
 919        struct ref *peer_ref; /* when renaming */
 920        char name[FLEX_ARRAY]; /* more */
 921};
 922
 923#define REF_NORMAL      (1u << 0)
 924#define REF_HEADS       (1u << 1)
 925#define REF_TAGS        (1u << 2)
 926
 927extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
 928
 929#define CONNECT_VERBOSE       (1u << 0)
 930extern char *git_getpass(const char *prompt);
 931extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 932extern int finish_connect(struct child_process *conn);
 933extern int path_match(const char *path, int nr, char **match);
 934struct extra_have_objects {
 935        int nr, alloc;
 936        unsigned char (*array)[20];
 937};
 938extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
 939extern int server_supports(const char *feature);
 940
 941extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
 942
 943extern void prepare_packed_git(void);
 944extern void reprepare_packed_git(void);
 945extern void install_packed_git(struct packed_git *pack);
 946
 947extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 948                                         struct packed_git *packs);
 949
 950extern void pack_report(void);
 951extern int open_pack_index(struct packed_git *);
 952extern void close_pack_index(struct packed_git *);
 953extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 954extern void close_pack_windows(struct packed_git *);
 955extern void unuse_pack(struct pack_window **);
 956extern void free_pack_by_name(const char *);
 957extern void clear_delta_base_cache(void);
 958extern struct packed_git *add_packed_git(const char *, int, int);
 959extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
 960extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
 961extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 962extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 963extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 964extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 965extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
 966
 967/* Dumb servers support */
 968extern int update_server_info(int);
 969
 970typedef int (*config_fn_t)(const char *, const char *, void *);
 971extern int git_default_config(const char *, const char *, void *);
 972extern int git_config_from_file(config_fn_t fn, const char *, void *);
 973extern int git_config_parse_parameter(const char *text);
 974extern int git_config_from_parameters(config_fn_t fn, void *data);
 975extern int git_config(config_fn_t fn, void *);
 976extern int git_parse_ulong(const char *, unsigned long *);
 977extern int git_config_int(const char *, const char *);
 978extern unsigned long git_config_ulong(const char *, const char *);
 979extern int git_config_bool_or_int(const char *, const char *, int *);
 980extern int git_config_bool(const char *, const char *);
 981extern int git_config_maybe_bool(const char *, const char *);
 982extern int git_config_string(const char **, const char *, const char *);
 983extern int git_config_pathname(const char **, const char *, const char *);
 984extern int git_config_set(const char *, const char *);
 985extern int git_config_set_multivar(const char *, const char *, const char *, int);
 986extern int git_config_rename_section(const char *, const char *);
 987extern const char *git_etc_gitconfig(void);
 988extern int check_repository_format_version(const char *var, const char *value, void *cb);
 989extern int git_env_bool(const char *, int);
 990extern int git_config_system(void);
 991extern int git_config_global(void);
 992extern int config_error_nonbool(const char *);
 993extern const char *config_exclusive_filename;
 994
 995#define MAX_GITNAME (1000)
 996extern char git_default_email[MAX_GITNAME];
 997extern char git_default_name[MAX_GITNAME];
 998#define IDENT_NAME_GIVEN 01
 999#define IDENT_MAIL_GIVEN 02
1000#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1001extern int user_ident_explicitly_given;
1002extern int user_ident_sufficiently_given(void);
1003
1004extern const char *git_commit_encoding;
1005extern const char *git_log_output_encoding;
1006extern const char *git_mailmap_file;
1007
1008/* IO helper functions */
1009extern void maybe_flush_or_die(FILE *, const char *);
1010extern int copy_fd(int ifd, int ofd);
1011extern int copy_file(const char *dst, const char *src, int mode);
1012extern int copy_file_with_time(const char *dst, const char *src, int mode);
1013extern void write_or_die(int fd, const void *buf, size_t count);
1014extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1015extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1016extern void fsync_or_die(int fd, const char *);
1017
1018extern ssize_t read_in_full(int fd, void *buf, size_t count);
1019extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1020static inline ssize_t write_str_in_full(int fd, const char *str)
1021{
1022        return write_in_full(fd, str, strlen(str));
1023}
1024
1025/* pager.c */
1026extern void setup_pager(void);
1027extern const char *pager_program;
1028extern int pager_in_use(void);
1029extern int pager_use_color;
1030
1031extern const char *editor_program;
1032extern const char *excludes_file;
1033
1034/* base85 */
1035int decode_85(char *dst, const char *line, int linelen);
1036void encode_85(char *buf, const unsigned char *data, int bytes);
1037
1038/* alloc.c */
1039extern void *alloc_blob_node(void);
1040extern void *alloc_tree_node(void);
1041extern void *alloc_commit_node(void);
1042extern void *alloc_tag_node(void);
1043extern void *alloc_object_node(void);
1044extern void alloc_report(void);
1045
1046/* trace.c */
1047__attribute__((format (printf, 1, 2)))
1048extern void trace_printf(const char *format, ...);
1049__attribute__((format (printf, 2, 3)))
1050extern void trace_argv_printf(const char **argv, const char *format, ...);
1051
1052/* convert.c */
1053/* returns 1 if *dst was used */
1054extern int convert_to_git(const char *path, const char *src, size_t len,
1055                          struct strbuf *dst, enum safe_crlf checksafe);
1056extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1057
1058/* add */
1059/*
1060 * return 0 if success, 1 - if addition of a file failed and
1061 * ADD_FILES_IGNORE_ERRORS was specified in flags
1062 */
1063int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1064
1065/* diff.c */
1066extern int diff_auto_refresh_index;
1067
1068/* match-trees.c */
1069void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1070void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1071
1072/*
1073 * whitespace rules.
1074 * used by both diff and apply
1075 */
1076#define WS_BLANK_AT_EOL         01
1077#define WS_SPACE_BEFORE_TAB     02
1078#define WS_INDENT_WITH_NON_TAB  04
1079#define WS_CR_AT_EOL           010
1080#define WS_BLANK_AT_EOF        020
1081#define WS_TAB_IN_INDENT       040
1082#define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1083#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
1084extern unsigned whitespace_rule_cfg;
1085extern unsigned whitespace_rule(const char *);
1086extern unsigned parse_whitespace_rule(const char *);
1087extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1088extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1089extern char *whitespace_error_string(unsigned ws);
1090extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1091extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1092
1093/* ls-files */
1094int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1095void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1096
1097char *alias_lookup(const char *alias);
1098int split_cmdline(char *cmdline, const char ***argv);
1099
1100/* builtin/merge.c */
1101int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1102
1103#endif /* CACHE_H */