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#include "gettext.h"
9#include "convert.h"
10
11#include SHA1_HEADER
12#ifndef git_SHA_CTX
13#define git_SHA_CTX SHA_CTX
14#define git_SHA1_Init SHA1_Init
15#define git_SHA1_Update SHA1_Update
16#define git_SHA1_Final SHA1_Final
17#endif
18
19#include <zlib.h>
20typedef struct git_zstream {
21 z_stream z;
22 unsigned long avail_in;
23 unsigned long avail_out;
24 unsigned long total_in;
25 unsigned long total_out;
26 unsigned char *next_in;
27 unsigned char *next_out;
28} git_zstream;
29
30void git_inflate_init(git_zstream *);
31void git_inflate_init_gzip_only(git_zstream *);
32void git_inflate_end(git_zstream *);
33int git_inflate(git_zstream *, int flush);
34
35void git_deflate_init(git_zstream *, int level);
36void git_deflate_init_gzip(git_zstream *, int level);
37void git_deflate_end(git_zstream *);
38int git_deflate_abort(git_zstream *);
39int git_deflate_end_gently(git_zstream *);
40int git_deflate(git_zstream *, int flush);
41unsigned long git_deflate_bound(git_zstream *, unsigned long);
42
43#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
44#define DTYPE(de) ((de)->d_type)
45#else
46#undef DT_UNKNOWN
47#undef DT_DIR
48#undef DT_REG
49#undef DT_LNK
50#define DT_UNKNOWN 0
51#define DT_DIR 1
52#define DT_REG 2
53#define DT_LNK 3
54#define DTYPE(de) DT_UNKNOWN
55#endif
56
57/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
58#define S_IFINVALID 0030000
59
60/*
61 * A "directory link" is a link to another git directory.
62 *
63 * The value 0160000 is not normally a valid mode, and
64 * also just happens to be S_IFDIR + S_IFLNK
65 *
66 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
67 * always having the same values everywhere. We should use
68 * our internal git values for these things, and then we can
69 * translate that to the OS-specific value. It just so
70 * happens that everybody shares the same bit representation
71 * in the UNIX world (and apparently wider too..)
72 */
73#define S_IFGITLINK 0160000
74#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
75
76/*
77 * Intensive research over the course of many years has shown that
78 * port 9418 is totally unused by anything else. Or
79 *
80 * Your search - "port 9418" - did not match any documents.
81 *
82 * as www.google.com puts it.
83 *
84 * This port has been properly assigned for git use by IANA:
85 * git (Assigned-9418) [I06-050728-0001].
86 *
87 * git 9418/tcp git pack transfer service
88 * git 9418/udp git pack transfer service
89 *
90 * with Linus Torvalds <torvalds@osdl.org> as the point of
91 * contact. September 2005.
92 *
93 * See http://www.iana.org/assignments/port-numbers
94 */
95#define DEFAULT_GIT_PORT 9418
96
97/*
98 * Basic data structures for the directory cache
99 */
100
101#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
102struct cache_header {
103 unsigned int hdr_signature;
104 unsigned int hdr_version;
105 unsigned int hdr_entries;
106};
107
108/*
109 * The "cache_time" is just the low 32 bits of the
110 * time. It doesn't matter if it overflows - we only
111 * check it for equality in the 32 bits we save.
112 */
113struct cache_time {
114 unsigned int sec;
115 unsigned int nsec;
116};
117
118/*
119 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
120 * Again - this is just a (very strong in practice) heuristic that
121 * the inode hasn't changed.
122 *
123 * We save the fields in big-endian order to allow using the
124 * index file over NFS transparently.
125 */
126struct ondisk_cache_entry {
127 struct cache_time ctime;
128 struct cache_time mtime;
129 unsigned int dev;
130 unsigned int ino;
131 unsigned int mode;
132 unsigned int uid;
133 unsigned int gid;
134 unsigned int size;
135 unsigned char sha1[20];
136 unsigned short flags;
137 char name[FLEX_ARRAY]; /* more */
138};
139
140/*
141 * This struct is used when CE_EXTENDED bit is 1
142 * The struct must match ondisk_cache_entry exactly from
143 * ctime till flags
144 */
145struct ondisk_cache_entry_extended {
146 struct cache_time ctime;
147 struct cache_time mtime;
148 unsigned int dev;
149 unsigned int ino;
150 unsigned int mode;
151 unsigned int uid;
152 unsigned int gid;
153 unsigned int size;
154 unsigned char sha1[20];
155 unsigned short flags;
156 unsigned short flags2;
157 char name[FLEX_ARRAY]; /* more */
158};
159
160struct cache_entry {
161 struct cache_time ce_ctime;
162 struct cache_time ce_mtime;
163 unsigned int ce_dev;
164 unsigned int ce_ino;
165 unsigned int ce_mode;
166 unsigned int ce_uid;
167 unsigned int ce_gid;
168 unsigned int ce_size;
169 unsigned int ce_flags;
170 unsigned char sha1[20];
171 struct cache_entry *next;
172 struct cache_entry *dir_next;
173 char name[FLEX_ARRAY]; /* more */
174};
175
176#define CE_NAMEMASK (0x0fff)
177#define CE_STAGEMASK (0x3000)
178#define CE_EXTENDED (0x4000)
179#define CE_VALID (0x8000)
180#define CE_STAGESHIFT 12
181
182/*
183 * Range 0xFFFF0000 in ce_flags is divided into
184 * two parts: in-memory flags and on-disk ones.
185 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
186 * if you want to save a new flag, add it in
187 * CE_EXTENDED_FLAGS
188 *
189 * In-memory only flags
190 */
191#define CE_UPDATE (1 << 16)
192#define CE_REMOVE (1 << 17)
193#define CE_UPTODATE (1 << 18)
194#define CE_ADDED (1 << 19)
195
196#define CE_HASHED (1 << 20)
197#define CE_UNHASHED (1 << 21)
198#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
199#define CE_CONFLICTED (1 << 23)
200
201#define CE_UNPACKED (1 << 24)
202#define CE_NEW_SKIP_WORKTREE (1 << 25)
203
204/*
205 * Extended on-disk flags
206 */
207#define CE_INTENT_TO_ADD (1 << 29)
208#define CE_SKIP_WORKTREE (1 << 30)
209/* CE_EXTENDED2 is for future extension */
210#define CE_EXTENDED2 (1 << 31)
211
212#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
213
214/*
215 * Safeguard to avoid saving wrong flags:
216 * - CE_EXTENDED2 won't get saved until its semantic is known
217 * - Bits in 0x0000FFFF have been saved in ce_flags already
218 * - Bits in 0x003F0000 are currently in-memory flags
219 */
220#if CE_EXTENDED_FLAGS & 0x803FFFFF
221#error "CE_EXTENDED_FLAGS out of range"
222#endif
223
224/*
225 * Copy the sha1 and stat state of a cache entry from one to
226 * another. But we never change the name, or the hash state!
227 */
228#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
229static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
230{
231 unsigned int state = dst->ce_flags & CE_STATE_MASK;
232
233 /* Don't copy hash chain and name */
234 memcpy(dst, src, offsetof(struct cache_entry, next));
235
236 /* Restore the hash state */
237 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
238}
239
240static inline unsigned create_ce_flags(size_t len, unsigned stage)
241{
242 if (len >= CE_NAMEMASK)
243 len = CE_NAMEMASK;
244 return (len | (stage << CE_STAGESHIFT));
245}
246
247static inline size_t ce_namelen(const struct cache_entry *ce)
248{
249 size_t len = ce->ce_flags & CE_NAMEMASK;
250 if (len < CE_NAMEMASK)
251 return len;
252 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
253}
254
255#define ce_size(ce) cache_entry_size(ce_namelen(ce))
256#define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
257 ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
258 ondisk_cache_entry_size(ce_namelen(ce)))
259#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
260#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
261#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
262#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
263
264#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
265static inline unsigned int create_ce_mode(unsigned int mode)
266{
267 if (S_ISLNK(mode))
268 return S_IFLNK;
269 if (S_ISDIR(mode) || S_ISGITLINK(mode))
270 return S_IFGITLINK;
271 return S_IFREG | ce_permissions(mode);
272}
273static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
274{
275 extern int trust_executable_bit, has_symlinks;
276 if (!has_symlinks && S_ISREG(mode) &&
277 ce && S_ISLNK(ce->ce_mode))
278 return ce->ce_mode;
279 if (!trust_executable_bit && S_ISREG(mode)) {
280 if (ce && S_ISREG(ce->ce_mode))
281 return ce->ce_mode;
282 return create_ce_mode(0666);
283 }
284 return create_ce_mode(mode);
285}
286static inline int ce_to_dtype(const struct cache_entry *ce)
287{
288 unsigned ce_mode = ntohl(ce->ce_mode);
289 if (S_ISREG(ce_mode))
290 return DT_REG;
291 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
292 return DT_DIR;
293 else if (S_ISLNK(ce_mode))
294 return DT_LNK;
295 else
296 return DT_UNKNOWN;
297}
298static inline unsigned int canon_mode(unsigned int mode)
299{
300 if (S_ISREG(mode))
301 return S_IFREG | ce_permissions(mode);
302 if (S_ISLNK(mode))
303 return S_IFLNK;
304 if (S_ISDIR(mode))
305 return S_IFDIR;
306 return S_IFGITLINK;
307}
308
309#define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
310#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
311#define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
312#define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
313
314struct index_state {
315 struct cache_entry **cache;
316 unsigned int cache_nr, cache_alloc, cache_changed;
317 struct string_list *resolve_undo;
318 struct cache_tree *cache_tree;
319 struct cache_time timestamp;
320 unsigned name_hash_initialized : 1,
321 initialized : 1;
322 struct hash_table name_hash;
323};
324
325extern struct index_state the_index;
326
327/* Name hashing */
328extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
329/*
330 * We don't actually *remove* it, we can just mark it invalid so that
331 * we won't find it in lookups.
332 *
333 * Not only would we have to search the lists (simple enough), but
334 * we'd also have to rehash other hash buckets in case this makes the
335 * hash bucket empty (common). So it's much better to just mark
336 * it.
337 */
338static inline void remove_name_hash(struct cache_entry *ce)
339{
340 ce->ce_flags |= CE_UNHASHED;
341}
342
343
344#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
345#define active_cache (the_index.cache)
346#define active_nr (the_index.cache_nr)
347#define active_alloc (the_index.cache_alloc)
348#define active_cache_changed (the_index.cache_changed)
349#define active_cache_tree (the_index.cache_tree)
350
351#define read_cache() read_index(&the_index)
352#define read_cache_from(path) read_index_from(&the_index, (path))
353#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
354#define is_cache_unborn() is_index_unborn(&the_index)
355#define read_cache_unmerged() read_index_unmerged(&the_index)
356#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
357#define discard_cache() discard_index(&the_index)
358#define unmerged_cache() unmerged_index(&the_index)
359#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
360#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
361#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
362#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
363#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
364#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
365#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
366#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
367#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
368#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
369#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
370#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
371#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
372#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
373#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
374#endif
375
376enum object_type {
377 OBJ_BAD = -1,
378 OBJ_NONE = 0,
379 OBJ_COMMIT = 1,
380 OBJ_TREE = 2,
381 OBJ_BLOB = 3,
382 OBJ_TAG = 4,
383 /* 5 for future expansion */
384 OBJ_OFS_DELTA = 6,
385 OBJ_REF_DELTA = 7,
386 OBJ_ANY,
387 OBJ_MAX
388};
389
390static inline enum object_type object_type(unsigned int mode)
391{
392 return S_ISDIR(mode) ? OBJ_TREE :
393 S_ISGITLINK(mode) ? OBJ_COMMIT :
394 OBJ_BLOB;
395}
396
397#define GIT_DIR_ENVIRONMENT "GIT_DIR"
398#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
399#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
400#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
401#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
402#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
403#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
404#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
405#define CONFIG_ENVIRONMENT "GIT_CONFIG"
406#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
407#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
408#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
409#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
410#define GITATTRIBUTES_FILE ".gitattributes"
411#define INFOATTRIBUTES_FILE "info/attributes"
412#define ATTRIBUTE_MACRO_PREFIX "[attr]"
413#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
414#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
415#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
416#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
417#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
418
419/*
420 * Repository-local GIT_* environment variables
421 * The array is NULL-terminated to simplify its usage in contexts such
422 * environment creation or simple walk of the list.
423 * The number of non-NULL entries is available as a macro.
424 */
425#define LOCAL_REPO_ENV_SIZE 9
426extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
427
428extern int is_bare_repository_cfg;
429extern int is_bare_repository(void);
430extern int is_inside_git_dir(void);
431extern char *git_work_tree_cfg;
432extern int is_inside_work_tree(void);
433extern int have_git_dir(void);
434extern const char *get_git_dir(void);
435extern char *get_object_directory(void);
436extern char *get_index_file(void);
437extern char *get_graft_file(void);
438extern int set_git_dir(const char *path);
439extern const char *get_git_namespace(void);
440extern const char *strip_namespace(const char *namespaced_ref);
441extern const char *get_git_work_tree(void);
442extern const char *read_gitfile(const char *path);
443extern const char *resolve_gitdir(const char *suspect);
444extern void set_git_work_tree(const char *tree);
445
446#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
447
448extern const char **get_pathspec(const char *prefix, const char **pathspec);
449extern void setup_work_tree(void);
450extern const char *setup_git_directory_gently(int *);
451extern const char *setup_git_directory(void);
452extern char *prefix_path(const char *prefix, int len, const char *path);
453extern const char *prefix_filename(const char *prefix, int len, const char *path);
454extern int check_filename(const char *prefix, const char *name);
455extern void verify_filename(const char *prefix, const char *name);
456extern void verify_non_filename(const char *prefix, const char *name);
457
458#define INIT_DB_QUIET 0x0001
459
460extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
461extern int init_db(const char *template_dir, unsigned int flags);
462
463#define alloc_nr(x) (((x)+16)*3/2)
464
465/*
466 * Realloc the buffer pointed at by variable 'x' so that it can hold
467 * at least 'nr' entries; the number of entries currently allocated
468 * is 'alloc', using the standard growing factor alloc_nr() macro.
469 *
470 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
471 */
472#define ALLOC_GROW(x, nr, alloc) \
473 do { \
474 if ((nr) > alloc) { \
475 if (alloc_nr(alloc) < (nr)) \
476 alloc = (nr); \
477 else \
478 alloc = alloc_nr(alloc); \
479 x = xrealloc((x), alloc * sizeof(*(x))); \
480 } \
481 } while (0)
482
483/* Initialize and use the cache information */
484extern int read_index(struct index_state *);
485extern int read_index_preload(struct index_state *, const char **pathspec);
486extern int read_index_from(struct index_state *, const char *path);
487extern int is_index_unborn(struct index_state *);
488extern int read_index_unmerged(struct index_state *);
489extern int write_index(struct index_state *, int newfd);
490extern int discard_index(struct index_state *);
491extern int unmerged_index(const struct index_state *);
492extern int verify_path(const char *path);
493extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
494extern int index_name_pos(const struct index_state *, const char *name, int namelen);
495#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
496#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
497#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
498#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
499#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
500extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
501extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
502extern int remove_index_entry_at(struct index_state *, int pos);
503extern void remove_marked_cache_entries(struct index_state *istate);
504extern int remove_file_from_index(struct index_state *, const char *path);
505#define ADD_CACHE_VERBOSE 1
506#define ADD_CACHE_PRETEND 2
507#define ADD_CACHE_IGNORE_ERRORS 4
508#define ADD_CACHE_IGNORE_REMOVAL 8
509#define ADD_CACHE_INTENT 16
510extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
511extern int add_file_to_index(struct index_state *, const char *path, int flags);
512extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
513extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
514extern int index_name_is_other(const struct index_state *, const char *, int);
515
516/* do stat comparison even if CE_VALID is true */
517#define CE_MATCH_IGNORE_VALID 01
518/* do not check the contents but report dirty on racily-clean entries */
519#define CE_MATCH_RACY_IS_DIRTY 02
520/* do stat comparison even if CE_SKIP_WORKTREE is true */
521#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
522extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
523extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
524
525struct pathspec {
526 const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
527 int nr;
528 unsigned int has_wildcard:1;
529 unsigned int recursive:1;
530 int max_depth;
531 struct pathspec_item {
532 const char *match;
533 int len;
534 unsigned int use_wildcard:1;
535 } *items;
536};
537
538extern int init_pathspec(struct pathspec *, const char **);
539extern void free_pathspec(struct pathspec *);
540extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
541
542#define HASH_WRITE_OBJECT 1
543#define HASH_FORMAT_CHECK 2
544extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
545extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
546extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
547
548#define REFRESH_REALLY 0x0001 /* ignore_valid */
549#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
550#define REFRESH_QUIET 0x0004 /* be quiet about it */
551#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
552#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
553#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
554extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
555
556struct lock_file {
557 struct lock_file *next;
558 int fd;
559 pid_t owner;
560 char on_list;
561 char filename[PATH_MAX];
562};
563#define LOCK_DIE_ON_ERROR 1
564#define LOCK_NODEREF 2
565extern int unable_to_lock_error(const char *path, int err);
566extern NORETURN void unable_to_lock_index_die(const char *path, int err);
567extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
568extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
569extern int commit_lock_file(struct lock_file *);
570extern void update_index_if_able(struct index_state *, struct lock_file *);
571
572extern int hold_locked_index(struct lock_file *, int);
573extern int commit_locked_index(struct lock_file *);
574extern void set_alternate_index_output(const char *);
575extern int close_lock_file(struct lock_file *);
576extern void rollback_lock_file(struct lock_file *);
577extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
578
579/* Environment bits from configuration mechanism */
580extern int trust_executable_bit;
581extern int trust_ctime;
582extern int quote_path_fully;
583extern int has_symlinks;
584extern int minimum_abbrev, default_abbrev;
585extern int ignore_case;
586extern int assume_unchanged;
587extern int prefer_symlink_refs;
588extern int log_all_ref_updates;
589extern int warn_ambiguous_refs;
590extern int shared_repository;
591extern const char *apply_default_whitespace;
592extern const char *apply_default_ignorewhitespace;
593extern const char *git_attributes_file;
594extern int zlib_compression_level;
595extern int core_compression_level;
596extern int core_compression_seen;
597extern size_t packed_git_window_size;
598extern size_t packed_git_limit;
599extern size_t delta_base_cache_limit;
600extern unsigned long big_file_threshold;
601extern unsigned long pack_size_limit_cfg;
602extern int read_replace_refs;
603extern int fsync_object_files;
604extern int core_preload_index;
605extern int core_apply_sparse_checkout;
606
607enum branch_track {
608 BRANCH_TRACK_UNSPECIFIED = -1,
609 BRANCH_TRACK_NEVER = 0,
610 BRANCH_TRACK_REMOTE,
611 BRANCH_TRACK_ALWAYS,
612 BRANCH_TRACK_EXPLICIT,
613 BRANCH_TRACK_OVERRIDE
614};
615
616enum rebase_setup_type {
617 AUTOREBASE_NEVER = 0,
618 AUTOREBASE_LOCAL,
619 AUTOREBASE_REMOTE,
620 AUTOREBASE_ALWAYS
621};
622
623enum push_default_type {
624 PUSH_DEFAULT_NOTHING = 0,
625 PUSH_DEFAULT_MATCHING,
626 PUSH_DEFAULT_UPSTREAM,
627 PUSH_DEFAULT_CURRENT
628};
629
630extern enum branch_track git_branch_track;
631extern enum rebase_setup_type autorebase;
632extern enum push_default_type push_default;
633
634enum object_creation_mode {
635 OBJECT_CREATION_USES_HARDLINKS = 0,
636 OBJECT_CREATION_USES_RENAMES = 1
637};
638
639extern enum object_creation_mode object_creation_mode;
640
641extern char *notes_ref_name;
642
643extern int grafts_replace_parents;
644
645#define GIT_REPO_VERSION 0
646extern int repository_format_version;
647extern int check_repository_format(void);
648
649#define MTIME_CHANGED 0x0001
650#define CTIME_CHANGED 0x0002
651#define OWNER_CHANGED 0x0004
652#define MODE_CHANGED 0x0008
653#define INODE_CHANGED 0x0010
654#define DATA_CHANGED 0x0020
655#define TYPE_CHANGED 0x0040
656
657extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
658 __attribute__((format (printf, 3, 4)));
659extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
660 __attribute__((format (printf, 3, 4)));
661extern char *git_pathdup(const char *fmt, ...)
662 __attribute__((format (printf, 1, 2)));
663
664/* Return a statically allocated filename matching the sha1 signature */
665extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
666extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
667extern char *git_path_submodule(const char *path, const char *fmt, ...)
668 __attribute__((format (printf, 2, 3)));
669
670extern char *sha1_file_name(const unsigned char *sha1);
671extern char *sha1_pack_name(const unsigned char *sha1);
672extern char *sha1_pack_index_name(const unsigned char *sha1);
673extern const char *find_unique_abbrev(const unsigned char *sha1, int);
674extern const unsigned char null_sha1[20];
675
676static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
677{
678 int i;
679
680 for (i = 0; i < 20; i++, sha1++, sha2++) {
681 if (*sha1 != *sha2)
682 return *sha1 - *sha2;
683 }
684
685 return 0;
686}
687
688static inline int is_null_sha1(const unsigned char *sha1)
689{
690 return !hashcmp(sha1, null_sha1);
691}
692
693static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
694{
695 memcpy(sha_dst, sha_src, 20);
696}
697static inline void hashclr(unsigned char *hash)
698{
699 memset(hash, 0, 20);
700}
701
702#define EMPTY_TREE_SHA1_HEX \
703 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
704#define EMPTY_TREE_SHA1_BIN_LITERAL \
705 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
706 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
707#define EMPTY_TREE_SHA1_BIN \
708 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
709
710int git_mkstemp(char *path, size_t n, const char *template);
711
712int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
713
714/* set default permissions by passing mode arguments to open(2) */
715int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
716int git_mkstemp_mode(char *pattern, int mode);
717
718/*
719 * NOTE NOTE NOTE!!
720 *
721 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
722 * not be changed. Old repositories have core.sharedrepository written in
723 * numeric format, and therefore these values are preserved for compatibility
724 * reasons.
725 */
726enum sharedrepo {
727 PERM_UMASK = 0,
728 OLD_PERM_GROUP = 1,
729 OLD_PERM_EVERYBODY = 2,
730 PERM_GROUP = 0660,
731 PERM_EVERYBODY = 0664
732};
733int git_config_perm(const char *var, const char *value);
734int set_shared_perm(const char *path, int mode);
735#define adjust_shared_perm(path) set_shared_perm((path), 0)
736int safe_create_leading_directories(char *path);
737int safe_create_leading_directories_const(const char *path);
738int mkdir_in_gitdir(const char *path);
739extern char *expand_user_path(const char *path);
740const char *enter_repo(const char *path, int strict);
741static inline int is_absolute_path(const char *path)
742{
743 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
744}
745int is_directory(const char *);
746const char *real_path(const char *path);
747const char *absolute_path(const char *path);
748const char *relative_path(const char *abs, const char *base);
749int normalize_path_copy(char *dst, const char *src);
750int longest_ancestor_length(const char *path, const char *prefix_list);
751char *strip_path_suffix(const char *path, const char *suffix);
752int daemon_avoid_alias(const char *path);
753int offset_1st_component(const char *path);
754
755/* object replacement */
756#define READ_SHA1_FILE_REPLACE 1
757extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
758static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
759{
760 return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
761}
762extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
763static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
764{
765 if (!read_replace_refs)
766 return sha1;
767 return do_lookup_replace_object(sha1);
768}
769
770/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
771extern int sha1_object_info(const unsigned char *, unsigned long *);
772extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
773extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
774extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
775extern int force_object_loose(const unsigned char *sha1, time_t mtime);
776extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
777extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
778extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
779
780/* global flag to enable extra checks when accessing packed objects */
781extern int do_check_packed_object_crc;
782
783/* for development: log offset of pack access */
784extern const char *log_pack_access;
785
786extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
787
788extern int move_temp_to_file(const char *tmpfile, const char *filename);
789
790extern int has_sha1_pack(const unsigned char *sha1);
791extern int has_sha1_file(const unsigned char *sha1);
792extern int has_loose_object_nonlocal(const unsigned char *sha1);
793
794extern int has_pack_index(const unsigned char *sha1);
795
796extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
797
798extern const signed char hexval_table[256];
799static inline unsigned int hexval(unsigned char c)
800{
801 return hexval_table[c];
802}
803
804/* Convert to/from hex/sha1 representation */
805#define MINIMUM_ABBREV minimum_abbrev
806#define DEFAULT_ABBREV default_abbrev
807
808struct object_context {
809 unsigned char tree[20];
810 char path[PATH_MAX];
811 unsigned mode;
812};
813
814extern int get_sha1(const char *str, unsigned char *sha1);
815extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
816extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
817extern int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc);
818
819/*
820 * Try to read a SHA1 in hexadecimal format from the 40 characters
821 * starting at hex. Write the 20-byte result to sha1 in binary form.
822 * Return 0 on success. Reading stops if a NUL is encountered in the
823 * input, so it is safe to pass this function an arbitrary
824 * null-terminated string.
825 */
826extern int get_sha1_hex(const char *hex, unsigned char *sha1);
827
828extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
829extern int read_ref_full(const char *refname, unsigned char *sha1,
830 int reading, int *flags);
831extern int read_ref(const char *refname, unsigned char *sha1);
832
833/*
834 * Resolve a reference, recursively following symbolic refererences.
835 *
836 * Store the referred-to object's name in sha1 and return the name of
837 * the non-symbolic reference that ultimately pointed at it. The
838 * return value, if not NULL, is a pointer into either a static buffer
839 * or the input ref.
840 *
841 * If the reference cannot be resolved to an object, the behavior
842 * depends on the "reading" argument:
843 *
844 * - If reading is set, return NULL.
845 *
846 * - If reading is not set, clear sha1 and return the name of the last
847 * reference name in the chain, which will either be a non-symbolic
848 * reference or an undefined reference. If this is a prelude to
849 * "writing" to the ref, the return value is the name of the ref
850 * that will actually be created or changed.
851 *
852 * If flag is non-NULL, set the value that it points to the
853 * combination of REF_ISPACKED (if the reference was found among the
854 * packed references) and REF_ISSYMREF (if the initial reference was a
855 * symbolic reference).
856 *
857 * If ref is not a properly-formatted, normalized reference, return
858 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
859 * give up and return NULL.
860 *
861 * errno is sometimes set on errors, but not always.
862 */
863extern const char *resolve_ref_unsafe(const char *ref, unsigned char *sha1, int reading, int *flag);
864extern char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag);
865
866extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
867extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
868extern int interpret_branch_name(const char *str, struct strbuf *);
869extern int get_sha1_mb(const char *str, unsigned char *sha1);
870
871extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
872extern const char *ref_rev_parse_rules[];
873#define ref_fetch_rules ref_rev_parse_rules
874
875extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
876extern int validate_headref(const char *ref);
877
878extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
879extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
880extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
881
882extern void *read_object_with_reference(const unsigned char *sha1,
883 const char *required_type,
884 unsigned long *size,
885 unsigned char *sha1_ret);
886
887extern struct object *peel_to_type(const char *name, int namelen,
888 struct object *o, enum object_type);
889
890enum date_mode {
891 DATE_NORMAL = 0,
892 DATE_RELATIVE,
893 DATE_SHORT,
894 DATE_LOCAL,
895 DATE_ISO8601,
896 DATE_RFC2822,
897 DATE_RAW
898};
899
900const char *show_date(unsigned long time, int timezone, enum date_mode mode);
901const char *show_date_relative(unsigned long time, int tz,
902 const struct timeval *now,
903 char *timebuf,
904 size_t timebuf_size);
905int parse_date(const char *date, char *buf, int bufsize);
906int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
907void datestamp(char *buf, int bufsize);
908#define approxidate(s) approxidate_careful((s), NULL)
909unsigned long approxidate_careful(const char *, int *);
910unsigned long approxidate_relative(const char *date, const struct timeval *now);
911enum date_mode parse_date_format(const char *format);
912
913#define IDENT_WARN_ON_NO_NAME 1
914#define IDENT_ERROR_ON_NO_NAME 2
915#define IDENT_NO_DATE 4
916extern const char *git_author_info(int);
917extern const char *git_committer_info(int);
918extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
919extern const char *fmt_name(const char *name, const char *email);
920extern const char *git_editor(void);
921extern const char *git_pager(int stdout_is_tty);
922
923struct checkout {
924 const char *base_dir;
925 int base_dir_len;
926 unsigned force:1,
927 quiet:1,
928 not_new:1,
929 refresh_cache:1;
930};
931
932extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
933
934struct cache_def {
935 char path[PATH_MAX + 1];
936 int len;
937 int flags;
938 int track_flags;
939 int prefix_len_stat_func;
940};
941
942extern int has_symlink_leading_path(const char *name, int len);
943extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
944extern int check_leading_path(const char *name, int len);
945extern int has_dirs_only_path(const char *name, int len, int prefix_len);
946extern void schedule_dir_for_removal(const char *name, int len);
947extern void remove_scheduled_dirs(void);
948
949extern struct alternate_object_database {
950 struct alternate_object_database *next;
951 char *name;
952 char base[FLEX_ARRAY]; /* more */
953} *alt_odb_list;
954extern void prepare_alt_odb(void);
955extern void add_to_alternates_file(const char *reference);
956typedef int alt_odb_fn(struct alternate_object_database *, void *);
957extern void foreach_alt_odb(alt_odb_fn, void*);
958
959struct pack_window {
960 struct pack_window *next;
961 unsigned char *base;
962 off_t offset;
963 size_t len;
964 unsigned int last_used;
965 unsigned int inuse_cnt;
966};
967
968extern struct packed_git {
969 struct packed_git *next;
970 struct pack_window *windows;
971 off_t pack_size;
972 const void *index_data;
973 size_t index_size;
974 uint32_t num_objects;
975 uint32_t num_bad_objects;
976 unsigned char *bad_object_sha1;
977 int index_version;
978 time_t mtime;
979 int pack_fd;
980 unsigned pack_local:1,
981 pack_keep:1,
982 do_not_close:1;
983 unsigned char sha1[20];
984 /* something like ".git/objects/pack/xxxxx.pack" */
985 char pack_name[FLEX_ARRAY]; /* more */
986} *packed_git;
987
988struct pack_entry {
989 off_t offset;
990 unsigned char sha1[20];
991 struct packed_git *p;
992};
993
994struct ref {
995 struct ref *next;
996 unsigned char old_sha1[20];
997 unsigned char new_sha1[20];
998 char *symref;
999 unsigned int force:1,
1000 merge:1,
1001 nonfastforward:1,
1002 deletion:1;
1003 enum {
1004 REF_STATUS_NONE = 0,
1005 REF_STATUS_OK,
1006 REF_STATUS_REJECT_NONFASTFORWARD,
1007 REF_STATUS_REJECT_NODELETE,
1008 REF_STATUS_UPTODATE,
1009 REF_STATUS_REMOTE_REJECT,
1010 REF_STATUS_EXPECTING_REPORT
1011 } status;
1012 char *remote_status;
1013 struct ref *peer_ref; /* when renaming */
1014 char name[FLEX_ARRAY]; /* more */
1015};
1016
1017#define REF_NORMAL (1u << 0)
1018#define REF_HEADS (1u << 1)
1019#define REF_TAGS (1u << 2)
1020
1021extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
1022
1023#define CONNECT_VERBOSE (1u << 0)
1024extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
1025extern int finish_connect(struct child_process *conn);
1026extern int git_connection_is_socket(struct child_process *conn);
1027struct extra_have_objects {
1028 int nr, alloc;
1029 unsigned char (*array)[20];
1030};
1031extern struct ref **get_remote_heads(int in, struct ref **list, unsigned int flags, struct extra_have_objects *);
1032extern int server_supports(const char *feature);
1033
1034extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1035
1036extern void prepare_packed_git(void);
1037extern void reprepare_packed_git(void);
1038extern void install_packed_git(struct packed_git *pack);
1039
1040extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1041 struct packed_git *packs);
1042
1043extern void pack_report(void);
1044extern int open_pack_index(struct packed_git *);
1045extern void close_pack_index(struct packed_git *);
1046extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1047extern void close_pack_windows(struct packed_git *);
1048extern void unuse_pack(struct pack_window **);
1049extern void free_pack_by_name(const char *);
1050extern void clear_delta_base_cache(void);
1051extern struct packed_git *add_packed_git(const char *, int, int);
1052extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1053extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1054extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1055extern int is_pack_valid(struct packed_git *);
1056extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1057extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1058extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1059extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1060
1061struct object_info {
1062 /* Request */
1063 unsigned long *sizep;
1064
1065 /* Response */
1066 enum {
1067 OI_CACHED,
1068 OI_LOOSE,
1069 OI_PACKED,
1070 OI_DBCACHED
1071 } whence;
1072 union {
1073 /*
1074 * struct {
1075 * ... Nothing to expose in this case
1076 * } cached;
1077 * struct {
1078 * ... Nothing to expose in this case
1079 * } loose;
1080 */
1081 struct {
1082 struct packed_git *pack;
1083 off_t offset;
1084 unsigned int is_delta;
1085 } packed;
1086 } u;
1087};
1088extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1089
1090/* Dumb servers support */
1091extern int update_server_info(int);
1092
1093/* git_config_parse_key() returns these negated: */
1094#define CONFIG_INVALID_KEY 1
1095#define CONFIG_NO_SECTION_OR_NAME 2
1096/* git_config_set(), git_config_set_multivar() return the above or these: */
1097#define CONFIG_NO_LOCK -1
1098#define CONFIG_INVALID_FILE 3
1099#define CONFIG_NO_WRITE 4
1100#define CONFIG_NOTHING_SET 5
1101#define CONFIG_INVALID_PATTERN 6
1102
1103typedef int (*config_fn_t)(const char *, const char *, void *);
1104extern int git_default_config(const char *, const char *, void *);
1105extern int git_config_from_file(config_fn_t fn, const char *, void *);
1106extern void git_config_push_parameter(const char *text);
1107extern int git_config_from_parameters(config_fn_t fn, void *data);
1108extern int git_config(config_fn_t fn, void *);
1109extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1110extern int git_parse_ulong(const char *, unsigned long *);
1111extern int git_config_int(const char *, const char *);
1112extern unsigned long git_config_ulong(const char *, const char *);
1113extern int git_config_bool_or_int(const char *, const char *, int *);
1114extern int git_config_bool(const char *, const char *);
1115extern int git_config_maybe_bool(const char *, const char *);
1116extern int git_config_string(const char **, const char *, const char *);
1117extern int git_config_pathname(const char **, const char *, const char *);
1118extern int git_config_set_in_file(const char *, const char *, const char *);
1119extern int git_config_set(const char *, const char *);
1120extern int git_config_parse_key(const char *, char **, int *);
1121extern int git_config_set_multivar(const char *, const char *, const char *, int);
1122extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1123extern int git_config_rename_section(const char *, const char *);
1124extern const char *git_etc_gitconfig(void);
1125extern int check_repository_format_version(const char *var, const char *value, void *cb);
1126extern int git_env_bool(const char *, int);
1127extern int git_config_system(void);
1128extern int config_error_nonbool(const char *);
1129extern const char *get_log_output_encoding(void);
1130extern const char *get_commit_output_encoding(void);
1131
1132extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1133
1134extern const char *config_exclusive_filename;
1135
1136#define MAX_GITNAME (1000)
1137extern char git_default_email[MAX_GITNAME];
1138extern char git_default_name[MAX_GITNAME];
1139#define IDENT_NAME_GIVEN 01
1140#define IDENT_MAIL_GIVEN 02
1141#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1142extern int user_ident_explicitly_given;
1143extern int user_ident_sufficiently_given(void);
1144
1145extern const char *git_commit_encoding;
1146extern const char *git_log_output_encoding;
1147extern const char *git_mailmap_file;
1148
1149/* IO helper functions */
1150extern void maybe_flush_or_die(FILE *, const char *);
1151extern int copy_fd(int ifd, int ofd);
1152extern int copy_file(const char *dst, const char *src, int mode);
1153extern int copy_file_with_time(const char *dst, const char *src, int mode);
1154extern void write_or_die(int fd, const void *buf, size_t count);
1155extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1156extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1157extern void fsync_or_die(int fd, const char *);
1158
1159extern ssize_t read_in_full(int fd, void *buf, size_t count);
1160extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1161static inline ssize_t write_str_in_full(int fd, const char *str)
1162{
1163 return write_in_full(fd, str, strlen(str));
1164}
1165
1166/* pager.c */
1167extern void setup_pager(void);
1168extern const char *pager_program;
1169extern int pager_in_use(void);
1170extern int pager_use_color;
1171
1172extern const char *editor_program;
1173extern const char *askpass_program;
1174extern const char *excludes_file;
1175
1176/* base85 */
1177int decode_85(char *dst, const char *line, int linelen);
1178void encode_85(char *buf, const unsigned char *data, int bytes);
1179
1180/* alloc.c */
1181extern void *alloc_blob_node(void);
1182extern void *alloc_tree_node(void);
1183extern void *alloc_commit_node(void);
1184extern void *alloc_tag_node(void);
1185extern void *alloc_object_node(void);
1186extern void alloc_report(void);
1187
1188/* trace.c */
1189__attribute__((format (printf, 1, 2)))
1190extern void trace_printf(const char *format, ...);
1191extern void trace_vprintf(const char *key, const char *format, va_list ap);
1192__attribute__((format (printf, 2, 3)))
1193extern void trace_argv_printf(const char **argv, const char *format, ...);
1194extern void trace_repo_setup(const char *prefix);
1195extern int trace_want(const char *key);
1196extern void trace_strbuf(const char *key, const struct strbuf *buf);
1197
1198void packet_trace_identity(const char *prog);
1199
1200/* add */
1201/*
1202 * return 0 if success, 1 - if addition of a file failed and
1203 * ADD_FILES_IGNORE_ERRORS was specified in flags
1204 */
1205int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1206
1207/* diff.c */
1208extern int diff_auto_refresh_index;
1209
1210/* match-trees.c */
1211void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1212void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1213
1214/*
1215 * whitespace rules.
1216 * used by both diff and apply
1217 * last two digits are tab width
1218 */
1219#define WS_BLANK_AT_EOL 0100
1220#define WS_SPACE_BEFORE_TAB 0200
1221#define WS_INDENT_WITH_NON_TAB 0400
1222#define WS_CR_AT_EOL 01000
1223#define WS_BLANK_AT_EOF 02000
1224#define WS_TAB_IN_INDENT 04000
1225#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1226#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1227#define WS_TAB_WIDTH_MASK 077
1228extern unsigned whitespace_rule_cfg;
1229extern unsigned whitespace_rule(const char *);
1230extern unsigned parse_whitespace_rule(const char *);
1231extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1232extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1233extern char *whitespace_error_string(unsigned ws);
1234extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1235extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1236#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1237
1238/* ls-files */
1239int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1240void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1241
1242char *alias_lookup(const char *alias);
1243int split_cmdline(char *cmdline, const char ***argv);
1244/* Takes a negative value returned by split_cmdline */
1245const char *split_cmdline_strerror(int cmdline_errno);
1246
1247/* git.c */
1248struct startup_info {
1249 int have_repository;
1250 const char *prefix;
1251};
1252extern struct startup_info *startup_info;
1253
1254/* builtin/merge.c */
1255int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1256
1257#endif /* CACHE_H */