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#define INDEX_FORMAT_LB 2
109#define INDEX_FORMAT_UB 4
110
111/*
112 * The "cache_time" is just the low 32 bits of the
113 * time. It doesn't matter if it overflows - we only
114 * check it for equality in the 32 bits we save.
115 */
116struct cache_time {
117 unsigned int sec;
118 unsigned int nsec;
119};
120
121struct cache_entry {
122 struct cache_time ce_ctime;
123 struct cache_time ce_mtime;
124 unsigned int ce_dev;
125 unsigned int ce_ino;
126 unsigned int ce_mode;
127 unsigned int ce_uid;
128 unsigned int ce_gid;
129 unsigned int ce_size;
130 unsigned int ce_flags;
131 unsigned char sha1[20];
132 struct cache_entry *next;
133 struct cache_entry *dir_next;
134 char name[FLEX_ARRAY]; /* more */
135};
136
137#define CE_NAMEMASK (0x0fff)
138#define CE_STAGEMASK (0x3000)
139#define CE_EXTENDED (0x4000)
140#define CE_VALID (0x8000)
141#define CE_STAGESHIFT 12
142
143/*
144 * Range 0xFFFF0000 in ce_flags is divided into
145 * two parts: in-memory flags and on-disk ones.
146 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
147 * if you want to save a new flag, add it in
148 * CE_EXTENDED_FLAGS
149 *
150 * In-memory only flags
151 */
152#define CE_UPDATE (1 << 16)
153#define CE_REMOVE (1 << 17)
154#define CE_UPTODATE (1 << 18)
155#define CE_ADDED (1 << 19)
156
157#define CE_HASHED (1 << 20)
158#define CE_UNHASHED (1 << 21)
159#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
160#define CE_CONFLICTED (1 << 23)
161
162#define CE_UNPACKED (1 << 24)
163#define CE_NEW_SKIP_WORKTREE (1 << 25)
164
165/*
166 * Extended on-disk flags
167 */
168#define CE_INTENT_TO_ADD (1 << 29)
169#define CE_SKIP_WORKTREE (1 << 30)
170/* CE_EXTENDED2 is for future extension */
171#define CE_EXTENDED2 (1 << 31)
172
173#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
174
175/*
176 * Safeguard to avoid saving wrong flags:
177 * - CE_EXTENDED2 won't get saved until its semantic is known
178 * - Bits in 0x0000FFFF have been saved in ce_flags already
179 * - Bits in 0x003F0000 are currently in-memory flags
180 */
181#if CE_EXTENDED_FLAGS & 0x803FFFFF
182#error "CE_EXTENDED_FLAGS out of range"
183#endif
184
185/*
186 * Copy the sha1 and stat state of a cache entry from one to
187 * another. But we never change the name, or the hash state!
188 */
189#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
190static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
191{
192 unsigned int state = dst->ce_flags & CE_STATE_MASK;
193
194 /* Don't copy hash chain and name */
195 memcpy(dst, src, offsetof(struct cache_entry, next));
196
197 /* Restore the hash state */
198 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
199}
200
201static inline unsigned create_ce_flags(size_t len, unsigned stage)
202{
203 if (len >= CE_NAMEMASK)
204 len = CE_NAMEMASK;
205 return (len | (stage << CE_STAGESHIFT));
206}
207
208static inline size_t ce_namelen(const struct cache_entry *ce)
209{
210 size_t len = ce->ce_flags & CE_NAMEMASK;
211 if (len < CE_NAMEMASK)
212 return len;
213 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
214}
215
216#define ce_size(ce) cache_entry_size(ce_namelen(ce))
217#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
218#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
219#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
220#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
221
222#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
223static inline unsigned int create_ce_mode(unsigned int mode)
224{
225 if (S_ISLNK(mode))
226 return S_IFLNK;
227 if (S_ISDIR(mode) || S_ISGITLINK(mode))
228 return S_IFGITLINK;
229 return S_IFREG | ce_permissions(mode);
230}
231static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
232{
233 extern int trust_executable_bit, has_symlinks;
234 if (!has_symlinks && S_ISREG(mode) &&
235 ce && S_ISLNK(ce->ce_mode))
236 return ce->ce_mode;
237 if (!trust_executable_bit && S_ISREG(mode)) {
238 if (ce && S_ISREG(ce->ce_mode))
239 return ce->ce_mode;
240 return create_ce_mode(0666);
241 }
242 return create_ce_mode(mode);
243}
244static inline int ce_to_dtype(const struct cache_entry *ce)
245{
246 unsigned ce_mode = ntohl(ce->ce_mode);
247 if (S_ISREG(ce_mode))
248 return DT_REG;
249 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
250 return DT_DIR;
251 else if (S_ISLNK(ce_mode))
252 return DT_LNK;
253 else
254 return DT_UNKNOWN;
255}
256static inline unsigned int canon_mode(unsigned int mode)
257{
258 if (S_ISREG(mode))
259 return S_IFREG | ce_permissions(mode);
260 if (S_ISLNK(mode))
261 return S_IFLNK;
262 if (S_ISDIR(mode))
263 return S_IFDIR;
264 return S_IFGITLINK;
265}
266
267#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
268
269struct index_state {
270 struct cache_entry **cache;
271 unsigned int version;
272 unsigned int cache_nr, cache_alloc, cache_changed;
273 struct string_list *resolve_undo;
274 struct cache_tree *cache_tree;
275 struct cache_time timestamp;
276 unsigned name_hash_initialized : 1,
277 initialized : 1;
278 struct hash_table name_hash;
279};
280
281extern struct index_state the_index;
282
283/* Name hashing */
284extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
285/*
286 * We don't actually *remove* it, we can just mark it invalid so that
287 * we won't find it in lookups.
288 *
289 * Not only would we have to search the lists (simple enough), but
290 * we'd also have to rehash other hash buckets in case this makes the
291 * hash bucket empty (common). So it's much better to just mark
292 * it.
293 */
294static inline void remove_name_hash(struct cache_entry *ce)
295{
296 ce->ce_flags |= CE_UNHASHED;
297}
298
299
300#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
301#define active_cache (the_index.cache)
302#define active_nr (the_index.cache_nr)
303#define active_alloc (the_index.cache_alloc)
304#define active_cache_changed (the_index.cache_changed)
305#define active_cache_tree (the_index.cache_tree)
306
307#define read_cache() read_index(&the_index)
308#define read_cache_from(path) read_index_from(&the_index, (path))
309#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
310#define is_cache_unborn() is_index_unborn(&the_index)
311#define read_cache_unmerged() read_index_unmerged(&the_index)
312#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
313#define discard_cache() discard_index(&the_index)
314#define unmerged_cache() unmerged_index(&the_index)
315#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
316#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
317#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
318#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
319#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
320#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
321#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
322#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
323#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
324#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
325#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
326#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
327#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
328#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
329#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
330#endif
331
332enum object_type {
333 OBJ_BAD = -1,
334 OBJ_NONE = 0,
335 OBJ_COMMIT = 1,
336 OBJ_TREE = 2,
337 OBJ_BLOB = 3,
338 OBJ_TAG = 4,
339 /* 5 for future expansion */
340 OBJ_OFS_DELTA = 6,
341 OBJ_REF_DELTA = 7,
342 OBJ_ANY,
343 OBJ_MAX
344};
345
346static inline enum object_type object_type(unsigned int mode)
347{
348 return S_ISDIR(mode) ? OBJ_TREE :
349 S_ISGITLINK(mode) ? OBJ_COMMIT :
350 OBJ_BLOB;
351}
352
353#define GIT_DIR_ENVIRONMENT "GIT_DIR"
354#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
355#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
356#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
357#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
358#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
359#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
360#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
361#define CONFIG_ENVIRONMENT "GIT_CONFIG"
362#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
363#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
364#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
365#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
366#define GITATTRIBUTES_FILE ".gitattributes"
367#define INFOATTRIBUTES_FILE "info/attributes"
368#define ATTRIBUTE_MACRO_PREFIX "[attr]"
369#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
370#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
371#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
372#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
373#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
374
375/*
376 * Repository-local GIT_* environment variables
377 * The array is NULL-terminated to simplify its usage in contexts such
378 * environment creation or simple walk of the list.
379 * The number of non-NULL entries is available as a macro.
380 */
381#define LOCAL_REPO_ENV_SIZE 9
382extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
383
384extern int is_bare_repository_cfg;
385extern int is_bare_repository(void);
386extern int is_inside_git_dir(void);
387extern char *git_work_tree_cfg;
388extern int is_inside_work_tree(void);
389extern int have_git_dir(void);
390extern const char *get_git_dir(void);
391extern int is_git_directory(const char *path);
392extern char *get_object_directory(void);
393extern char *get_index_file(void);
394extern char *get_graft_file(void);
395extern int set_git_dir(const char *path);
396extern const char *get_git_namespace(void);
397extern const char *strip_namespace(const char *namespaced_ref);
398extern const char *get_git_work_tree(void);
399extern const char *read_gitfile(const char *path);
400extern const char *resolve_gitdir(const char *suspect);
401extern void set_git_work_tree(const char *tree);
402
403#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
404
405extern const char **get_pathspec(const char *prefix, const char **pathspec);
406extern void setup_work_tree(void);
407extern const char *setup_git_directory_gently(int *);
408extern const char *setup_git_directory(void);
409extern char *prefix_path(const char *prefix, int len, const char *path);
410extern const char *prefix_filename(const char *prefix, int len, const char *path);
411extern int check_filename(const char *prefix, const char *name);
412extern void verify_filename(const char *prefix,
413 const char *name,
414 int diagnose_misspelt_rev);
415extern void verify_non_filename(const char *prefix, const char *name);
416extern int path_inside_repo(const char *prefix, const char *path);
417
418#define INIT_DB_QUIET 0x0001
419
420extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
421extern int init_db(const char *template_dir, unsigned int flags);
422
423#define alloc_nr(x) (((x)+16)*3/2)
424
425/*
426 * Realloc the buffer pointed at by variable 'x' so that it can hold
427 * at least 'nr' entries; the number of entries currently allocated
428 * is 'alloc', using the standard growing factor alloc_nr() macro.
429 *
430 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
431 */
432#define ALLOC_GROW(x, nr, alloc) \
433 do { \
434 if ((nr) > alloc) { \
435 if (alloc_nr(alloc) < (nr)) \
436 alloc = (nr); \
437 else \
438 alloc = alloc_nr(alloc); \
439 x = xrealloc((x), alloc * sizeof(*(x))); \
440 } \
441 } while (0)
442
443/* Initialize and use the cache information */
444extern int read_index(struct index_state *);
445extern int read_index_preload(struct index_state *, const char **pathspec);
446extern int read_index_from(struct index_state *, const char *path);
447extern int is_index_unborn(struct index_state *);
448extern int read_index_unmerged(struct index_state *);
449extern int write_index(struct index_state *, int newfd);
450extern int discard_index(struct index_state *);
451extern int unmerged_index(const struct index_state *);
452extern int verify_path(const char *path);
453extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
454extern int index_name_pos(const struct index_state *, const char *name, int namelen);
455#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
456#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
457#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
458#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
459#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
460extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
461extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
462extern int remove_index_entry_at(struct index_state *, int pos);
463extern void remove_marked_cache_entries(struct index_state *istate);
464extern int remove_file_from_index(struct index_state *, const char *path);
465#define ADD_CACHE_VERBOSE 1
466#define ADD_CACHE_PRETEND 2
467#define ADD_CACHE_IGNORE_ERRORS 4
468#define ADD_CACHE_IGNORE_REMOVAL 8
469#define ADD_CACHE_INTENT 16
470extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
471extern int add_file_to_index(struct index_state *, const char *path, int flags);
472extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
473extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
474extern int index_name_is_other(const struct index_state *, const char *, int);
475
476/* do stat comparison even if CE_VALID is true */
477#define CE_MATCH_IGNORE_VALID 01
478/* do not check the contents but report dirty on racily-clean entries */
479#define CE_MATCH_RACY_IS_DIRTY 02
480/* do stat comparison even if CE_SKIP_WORKTREE is true */
481#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
482extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
483extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
484
485struct pathspec {
486 const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
487 int nr;
488 unsigned int has_wildcard:1;
489 unsigned int recursive:1;
490 int max_depth;
491 struct pathspec_item {
492 const char *match;
493 int len;
494 unsigned int use_wildcard:1;
495 } *items;
496};
497
498extern int init_pathspec(struct pathspec *, const char **);
499extern void free_pathspec(struct pathspec *);
500extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
501
502#define HASH_WRITE_OBJECT 1
503#define HASH_FORMAT_CHECK 2
504extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
505extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
506extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
507
508#define REFRESH_REALLY 0x0001 /* ignore_valid */
509#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
510#define REFRESH_QUIET 0x0004 /* be quiet about it */
511#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
512#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
513#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
514extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
515
516struct lock_file {
517 struct lock_file *next;
518 int fd;
519 pid_t owner;
520 char on_list;
521 char filename[PATH_MAX];
522};
523#define LOCK_DIE_ON_ERROR 1
524#define LOCK_NODEREF 2
525extern int unable_to_lock_error(const char *path, int err);
526extern NORETURN void unable_to_lock_index_die(const char *path, int err);
527extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
528extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
529extern int commit_lock_file(struct lock_file *);
530extern void update_index_if_able(struct index_state *, struct lock_file *);
531
532extern int hold_locked_index(struct lock_file *, int);
533extern int commit_locked_index(struct lock_file *);
534extern void set_alternate_index_output(const char *);
535extern int close_lock_file(struct lock_file *);
536extern void rollback_lock_file(struct lock_file *);
537extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
538
539/* Environment bits from configuration mechanism */
540extern int trust_executable_bit;
541extern int trust_ctime;
542extern int quote_path_fully;
543extern int has_symlinks;
544extern int minimum_abbrev, default_abbrev;
545extern int ignore_case;
546extern int assume_unchanged;
547extern int prefer_symlink_refs;
548extern int log_all_ref_updates;
549extern int warn_ambiguous_refs;
550extern int shared_repository;
551extern const char *apply_default_whitespace;
552extern const char *apply_default_ignorewhitespace;
553extern const char *git_attributes_file;
554extern int zlib_compression_level;
555extern int core_compression_level;
556extern int core_compression_seen;
557extern size_t packed_git_window_size;
558extern size_t packed_git_limit;
559extern size_t delta_base_cache_limit;
560extern unsigned long big_file_threshold;
561extern unsigned long pack_size_limit_cfg;
562extern int read_replace_refs;
563extern int fsync_object_files;
564extern int core_preload_index;
565extern int core_apply_sparse_checkout;
566extern int precomposed_unicode;
567
568enum branch_track {
569 BRANCH_TRACK_UNSPECIFIED = -1,
570 BRANCH_TRACK_NEVER = 0,
571 BRANCH_TRACK_REMOTE,
572 BRANCH_TRACK_ALWAYS,
573 BRANCH_TRACK_EXPLICIT,
574 BRANCH_TRACK_OVERRIDE
575};
576
577enum rebase_setup_type {
578 AUTOREBASE_NEVER = 0,
579 AUTOREBASE_LOCAL,
580 AUTOREBASE_REMOTE,
581 AUTOREBASE_ALWAYS
582};
583
584enum push_default_type {
585 PUSH_DEFAULT_NOTHING = 0,
586 PUSH_DEFAULT_MATCHING,
587 PUSH_DEFAULT_SIMPLE,
588 PUSH_DEFAULT_UPSTREAM,
589 PUSH_DEFAULT_CURRENT,
590 PUSH_DEFAULT_UNSPECIFIED
591};
592
593extern enum branch_track git_branch_track;
594extern enum rebase_setup_type autorebase;
595extern enum push_default_type push_default;
596
597enum object_creation_mode {
598 OBJECT_CREATION_USES_HARDLINKS = 0,
599 OBJECT_CREATION_USES_RENAMES = 1
600};
601
602extern enum object_creation_mode object_creation_mode;
603
604extern char *notes_ref_name;
605
606extern int grafts_replace_parents;
607
608#define GIT_REPO_VERSION 0
609extern int repository_format_version;
610extern int check_repository_format(void);
611
612#define MTIME_CHANGED 0x0001
613#define CTIME_CHANGED 0x0002
614#define OWNER_CHANGED 0x0004
615#define MODE_CHANGED 0x0008
616#define INODE_CHANGED 0x0010
617#define DATA_CHANGED 0x0020
618#define TYPE_CHANGED 0x0040
619
620extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
621 __attribute__((format (printf, 3, 4)));
622extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
623 __attribute__((format (printf, 3, 4)));
624extern char *git_pathdup(const char *fmt, ...)
625 __attribute__((format (printf, 1, 2)));
626extern char *mkpathdup(const char *fmt, ...)
627 __attribute__((format (printf, 1, 2)));
628
629/* Return a statically allocated filename matching the sha1 signature */
630extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
631extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
632extern char *git_path_submodule(const char *path, const char *fmt, ...)
633 __attribute__((format (printf, 2, 3)));
634
635extern char *sha1_file_name(const unsigned char *sha1);
636extern char *sha1_pack_name(const unsigned char *sha1);
637extern char *sha1_pack_index_name(const unsigned char *sha1);
638extern const char *find_unique_abbrev(const unsigned char *sha1, int);
639extern const unsigned char null_sha1[20];
640
641static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
642{
643 int i;
644
645 for (i = 0; i < 20; i++, sha1++, sha2++) {
646 if (*sha1 != *sha2)
647 return *sha1 - *sha2;
648 }
649
650 return 0;
651}
652
653static inline int is_null_sha1(const unsigned char *sha1)
654{
655 return !hashcmp(sha1, null_sha1);
656}
657
658static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
659{
660 memcpy(sha_dst, sha_src, 20);
661}
662static inline void hashclr(unsigned char *hash)
663{
664 memset(hash, 0, 20);
665}
666
667#define EMPTY_TREE_SHA1_HEX \
668 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
669#define EMPTY_TREE_SHA1_BIN_LITERAL \
670 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
671 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
672#define EMPTY_TREE_SHA1_BIN \
673 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
674
675#define EMPTY_BLOB_SHA1_HEX \
676 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
677#define EMPTY_BLOB_SHA1_BIN_LITERAL \
678 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
679 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
680#define EMPTY_BLOB_SHA1_BIN \
681 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
682
683static inline int is_empty_blob_sha1(const unsigned char *sha1)
684{
685 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
686}
687
688int git_mkstemp(char *path, size_t n, const char *template);
689
690int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
691
692/* set default permissions by passing mode arguments to open(2) */
693int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
694int git_mkstemp_mode(char *pattern, int mode);
695
696/*
697 * NOTE NOTE NOTE!!
698 *
699 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
700 * not be changed. Old repositories have core.sharedrepository written in
701 * numeric format, and therefore these values are preserved for compatibility
702 * reasons.
703 */
704enum sharedrepo {
705 PERM_UMASK = 0,
706 OLD_PERM_GROUP = 1,
707 OLD_PERM_EVERYBODY = 2,
708 PERM_GROUP = 0660,
709 PERM_EVERYBODY = 0664
710};
711int git_config_perm(const char *var, const char *value);
712int set_shared_perm(const char *path, int mode);
713#define adjust_shared_perm(path) set_shared_perm((path), 0)
714int safe_create_leading_directories(char *path);
715int safe_create_leading_directories_const(const char *path);
716int mkdir_in_gitdir(const char *path);
717extern void home_config_paths(char **global, char **xdg, char *file);
718extern char *expand_user_path(const char *path);
719const char *enter_repo(const char *path, int strict);
720static inline int is_absolute_path(const char *path)
721{
722 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
723}
724int is_directory(const char *);
725const char *real_path(const char *path);
726const char *absolute_path(const char *path);
727const char *relative_path(const char *abs, const char *base);
728int normalize_path_copy(char *dst, const char *src);
729int longest_ancestor_length(const char *path, const char *prefix_list);
730char *strip_path_suffix(const char *path, const char *suffix);
731int daemon_avoid_alias(const char *path);
732int offset_1st_component(const char *path);
733
734/* object replacement */
735#define READ_SHA1_FILE_REPLACE 1
736extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
737static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
738{
739 return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
740}
741extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
742static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
743{
744 if (!read_replace_refs)
745 return sha1;
746 return do_lookup_replace_object(sha1);
747}
748
749/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
750extern int sha1_object_info(const unsigned char *, unsigned long *);
751extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
752extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
753extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
754extern int force_object_loose(const unsigned char *sha1, time_t mtime);
755extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
756extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
757extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
758
759/* global flag to enable extra checks when accessing packed objects */
760extern int do_check_packed_object_crc;
761
762/* for development: log offset of pack access */
763extern const char *log_pack_access;
764
765extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
766
767extern int move_temp_to_file(const char *tmpfile, const char *filename);
768
769extern int has_sha1_pack(const unsigned char *sha1);
770extern int has_sha1_file(const unsigned char *sha1);
771extern int has_loose_object_nonlocal(const unsigned char *sha1);
772
773extern int has_pack_index(const unsigned char *sha1);
774
775extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
776
777extern const signed char hexval_table[256];
778static inline unsigned int hexval(unsigned char c)
779{
780 return hexval_table[c];
781}
782
783/* Convert to/from hex/sha1 representation */
784#define MINIMUM_ABBREV minimum_abbrev
785#define DEFAULT_ABBREV default_abbrev
786
787struct object_context {
788 unsigned char tree[20];
789 char path[PATH_MAX];
790 unsigned mode;
791};
792
793extern int get_sha1(const char *str, unsigned char *sha1);
794extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
795static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
796{
797 return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
798}
799extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
800static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
801{
802 return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
803}
804
805/*
806 * Try to read a SHA1 in hexadecimal format from the 40 characters
807 * starting at hex. Write the 20-byte result to sha1 in binary form.
808 * Return 0 on success. Reading stops if a NUL is encountered in the
809 * input, so it is safe to pass this function an arbitrary
810 * null-terminated string.
811 */
812extern int get_sha1_hex(const char *hex, unsigned char *sha1);
813
814extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
815extern int read_ref_full(const char *refname, unsigned char *sha1,
816 int reading, int *flags);
817extern int read_ref(const char *refname, unsigned char *sha1);
818
819/*
820 * Resolve a reference, recursively following symbolic refererences.
821 *
822 * Store the referred-to object's name in sha1 and return the name of
823 * the non-symbolic reference that ultimately pointed at it. The
824 * return value, if not NULL, is a pointer into either a static buffer
825 * or the input ref.
826 *
827 * If the reference cannot be resolved to an object, the behavior
828 * depends on the "reading" argument:
829 *
830 * - If reading is set, return NULL.
831 *
832 * - If reading is not set, clear sha1 and return the name of the last
833 * reference name in the chain, which will either be a non-symbolic
834 * reference or an undefined reference. If this is a prelude to
835 * "writing" to the ref, the return value is the name of the ref
836 * that will actually be created or changed.
837 *
838 * If flag is non-NULL, set the value that it points to the
839 * combination of REF_ISPACKED (if the reference was found among the
840 * packed references) and REF_ISSYMREF (if the initial reference was a
841 * symbolic reference).
842 *
843 * If ref is not a properly-formatted, normalized reference, return
844 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
845 * give up and return NULL.
846 *
847 * errno is sometimes set on errors, but not always.
848 */
849extern const char *resolve_ref_unsafe(const char *ref, unsigned char *sha1, int reading, int *flag);
850extern char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag);
851
852extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
853extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
854extern int interpret_branch_name(const char *str, struct strbuf *);
855extern int get_sha1_mb(const char *str, unsigned char *sha1);
856
857extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
858extern const char *ref_rev_parse_rules[];
859#define ref_fetch_rules ref_rev_parse_rules
860
861extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
862extern int validate_headref(const char *ref);
863
864extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
865extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
866extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
867
868extern void *read_object_with_reference(const unsigned char *sha1,
869 const char *required_type,
870 unsigned long *size,
871 unsigned char *sha1_ret);
872
873extern struct object *peel_to_type(const char *name, int namelen,
874 struct object *o, enum object_type);
875
876enum date_mode {
877 DATE_NORMAL = 0,
878 DATE_RELATIVE,
879 DATE_SHORT,
880 DATE_LOCAL,
881 DATE_ISO8601,
882 DATE_RFC2822,
883 DATE_RAW
884};
885
886const char *show_date(unsigned long time, int timezone, enum date_mode mode);
887void show_date_relative(unsigned long time, int tz, const struct timeval *now,
888 struct strbuf *timebuf);
889int parse_date(const char *date, char *buf, int bufsize);
890int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
891void datestamp(char *buf, int bufsize);
892#define approxidate(s) approxidate_careful((s), NULL)
893unsigned long approxidate_careful(const char *, int *);
894unsigned long approxidate_relative(const char *date, const struct timeval *now);
895enum date_mode parse_date_format(const char *format);
896
897#define IDENT_STRICT 1
898#define IDENT_NO_DATE 2
899#define IDENT_NO_NAME 4
900extern const char *git_author_info(int);
901extern const char *git_committer_info(int);
902extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
903extern const char *fmt_name(const char *name, const char *email);
904extern const char *ident_default_name(void);
905extern const char *ident_default_email(void);
906extern const char *ident_default_date(void);
907extern const char *git_editor(void);
908extern const char *git_pager(int stdout_is_tty);
909extern int git_ident_config(const char *, const char *, void *);
910
911struct ident_split {
912 const char *name_begin;
913 const char *name_end;
914 const char *mail_begin;
915 const char *mail_end;
916 const char *date_begin;
917 const char *date_end;
918 const char *tz_begin;
919 const char *tz_end;
920};
921/*
922 * Signals an success with 0, but time part of the result may be NULL
923 * if the input lacks timestamp and zone
924 */
925extern int split_ident_line(struct ident_split *, const char *, int);
926
927struct checkout {
928 const char *base_dir;
929 int base_dir_len;
930 unsigned force:1,
931 quiet:1,
932 not_new:1,
933 refresh_cache:1;
934};
935
936extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
937
938struct cache_def {
939 char path[PATH_MAX + 1];
940 int len;
941 int flags;
942 int track_flags;
943 int prefix_len_stat_func;
944};
945
946extern int has_symlink_leading_path(const char *name, int len);
947extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
948extern int check_leading_path(const char *name, int len);
949extern int threaded_check_leading_path(struct cache_def *cache, const char *name, int len);
950extern int has_dirs_only_path(const char *name, int len, int prefix_len);
951extern int threaded_has_dirs_only_path(struct cache_def *cache, const char *name, int len, int prefix_len);
952extern void schedule_dir_for_removal(const char *name, int len);
953extern void remove_scheduled_dirs(void);
954
955extern struct alternate_object_database {
956 struct alternate_object_database *next;
957 char *name;
958 char base[FLEX_ARRAY]; /* more */
959} *alt_odb_list;
960extern void prepare_alt_odb(void);
961extern void read_info_alternates(const char * relative_base, int depth);
962extern void add_to_alternates_file(const char *reference);
963typedef int alt_odb_fn(struct alternate_object_database *, void *);
964extern void foreach_alt_odb(alt_odb_fn, void*);
965
966struct pack_window {
967 struct pack_window *next;
968 unsigned char *base;
969 off_t offset;
970 size_t len;
971 unsigned int last_used;
972 unsigned int inuse_cnt;
973};
974
975extern struct packed_git {
976 struct packed_git *next;
977 struct pack_window *windows;
978 off_t pack_size;
979 const void *index_data;
980 size_t index_size;
981 uint32_t num_objects;
982 uint32_t num_bad_objects;
983 unsigned char *bad_object_sha1;
984 int index_version;
985 time_t mtime;
986 int pack_fd;
987 unsigned pack_local:1,
988 pack_keep:1,
989 do_not_close:1;
990 unsigned char sha1[20];
991 /* something like ".git/objects/pack/xxxxx.pack" */
992 char pack_name[FLEX_ARRAY]; /* more */
993} *packed_git;
994
995struct pack_entry {
996 off_t offset;
997 unsigned char sha1[20];
998 struct packed_git *p;
999};
1000
1001struct ref {
1002 struct ref *next;
1003 unsigned char old_sha1[20];
1004 unsigned char new_sha1[20];
1005 char *symref;
1006 unsigned int force:1,
1007 merge:1,
1008 nonfastforward:1,
1009 deletion:1;
1010 enum {
1011 REF_STATUS_NONE = 0,
1012 REF_STATUS_OK,
1013 REF_STATUS_REJECT_NONFASTFORWARD,
1014 REF_STATUS_REJECT_NODELETE,
1015 REF_STATUS_UPTODATE,
1016 REF_STATUS_REMOTE_REJECT,
1017 REF_STATUS_EXPECTING_REPORT
1018 } status;
1019 char *remote_status;
1020 struct ref *peer_ref; /* when renaming */
1021 char name[FLEX_ARRAY]; /* more */
1022};
1023
1024#define REF_NORMAL (1u << 0)
1025#define REF_HEADS (1u << 1)
1026#define REF_TAGS (1u << 2)
1027
1028extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
1029
1030#define CONNECT_VERBOSE (1u << 0)
1031extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
1032extern int finish_connect(struct child_process *conn);
1033extern int git_connection_is_socket(struct child_process *conn);
1034struct extra_have_objects {
1035 int nr, alloc;
1036 unsigned char (*array)[20];
1037};
1038extern struct ref **get_remote_heads(int in, struct ref **list, unsigned int flags, struct extra_have_objects *);
1039extern int server_supports(const char *feature);
1040extern const char *parse_feature_request(const char *features, const char *feature);
1041
1042extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1043
1044extern void prepare_packed_git(void);
1045extern void reprepare_packed_git(void);
1046extern void install_packed_git(struct packed_git *pack);
1047
1048extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1049 struct packed_git *packs);
1050
1051extern void pack_report(void);
1052extern int open_pack_index(struct packed_git *);
1053extern void close_pack_index(struct packed_git *);
1054extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1055extern void close_pack_windows(struct packed_git *);
1056extern void unuse_pack(struct pack_window **);
1057extern void free_pack_by_name(const char *);
1058extern void clear_delta_base_cache(void);
1059extern struct packed_git *add_packed_git(const char *, int, int);
1060extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1061extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1062extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1063extern int is_pack_valid(struct packed_git *);
1064extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1065extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1066extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1067extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1068
1069struct object_info {
1070 /* Request */
1071 unsigned long *sizep;
1072
1073 /* Response */
1074 enum {
1075 OI_CACHED,
1076 OI_LOOSE,
1077 OI_PACKED,
1078 OI_DBCACHED
1079 } whence;
1080 union {
1081 /*
1082 * struct {
1083 * ... Nothing to expose in this case
1084 * } cached;
1085 * struct {
1086 * ... Nothing to expose in this case
1087 * } loose;
1088 */
1089 struct {
1090 struct packed_git *pack;
1091 off_t offset;
1092 unsigned int is_delta;
1093 } packed;
1094 } u;
1095};
1096extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1097
1098/* Dumb servers support */
1099extern int update_server_info(int);
1100
1101/* git_config_parse_key() returns these negated: */
1102#define CONFIG_INVALID_KEY 1
1103#define CONFIG_NO_SECTION_OR_NAME 2
1104/* git_config_set(), git_config_set_multivar() return the above or these: */
1105#define CONFIG_NO_LOCK -1
1106#define CONFIG_INVALID_FILE 3
1107#define CONFIG_NO_WRITE 4
1108#define CONFIG_NOTHING_SET 5
1109#define CONFIG_INVALID_PATTERN 6
1110
1111typedef int (*config_fn_t)(const char *, const char *, void *);
1112extern int git_default_config(const char *, const char *, void *);
1113extern int git_config_from_file(config_fn_t fn, const char *, void *);
1114extern void git_config_push_parameter(const char *text);
1115extern int git_config_from_parameters(config_fn_t fn, void *data);
1116extern int git_config(config_fn_t fn, void *);
1117extern int git_config_with_options(config_fn_t fn, void *,
1118 const char *filename, int respect_includes);
1119extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1120extern int git_parse_ulong(const char *, unsigned long *);
1121extern int git_config_int(const char *, const char *);
1122extern unsigned long git_config_ulong(const char *, const char *);
1123extern int git_config_bool_or_int(const char *, const char *, int *);
1124extern int git_config_bool(const char *, const char *);
1125extern int git_config_maybe_bool(const char *, const char *);
1126extern int git_config_string(const char **, const char *, const char *);
1127extern int git_config_pathname(const char **, const char *, const char *);
1128extern int git_config_set_in_file(const char *, const char *, const char *);
1129extern int git_config_set(const char *, const char *);
1130extern int git_config_parse_key(const char *, char **, int *);
1131extern int git_config_set_multivar(const char *, const char *, const char *, int);
1132extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1133extern int git_config_rename_section(const char *, const char *);
1134extern int git_config_rename_section_in_file(const char *, const char *, const char *);
1135extern const char *git_etc_gitconfig(void);
1136extern int check_repository_format_version(const char *var, const char *value, void *cb);
1137extern int git_env_bool(const char *, int);
1138extern int git_config_system(void);
1139extern int config_error_nonbool(const char *);
1140extern const char *get_log_output_encoding(void);
1141extern const char *get_commit_output_encoding(void);
1142
1143extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1144
1145struct config_include_data {
1146 int depth;
1147 config_fn_t fn;
1148 void *data;
1149};
1150#define CONFIG_INCLUDE_INIT { 0 }
1151extern int git_config_include(const char *name, const char *value, void *data);
1152
1153#define IDENT_NAME_GIVEN 01
1154#define IDENT_MAIL_GIVEN 02
1155#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1156extern int user_ident_explicitly_given;
1157extern int user_ident_sufficiently_given(void);
1158
1159extern const char *git_commit_encoding;
1160extern const char *git_log_output_encoding;
1161extern const char *git_mailmap_file;
1162
1163/* IO helper functions */
1164extern void maybe_flush_or_die(FILE *, const char *);
1165extern int copy_fd(int ifd, int ofd);
1166extern int copy_file(const char *dst, const char *src, int mode);
1167extern int copy_file_with_time(const char *dst, const char *src, int mode);
1168extern void write_or_die(int fd, const void *buf, size_t count);
1169extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1170extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1171extern void fsync_or_die(int fd, const char *);
1172
1173extern ssize_t read_in_full(int fd, void *buf, size_t count);
1174extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1175static inline ssize_t write_str_in_full(int fd, const char *str)
1176{
1177 return write_in_full(fd, str, strlen(str));
1178}
1179
1180/* pager.c */
1181extern void setup_pager(void);
1182extern const char *pager_program;
1183extern int pager_in_use(void);
1184extern int pager_use_color;
1185extern int term_columns(void);
1186extern int decimal_width(int);
1187
1188extern const char *editor_program;
1189extern const char *askpass_program;
1190extern const char *excludes_file;
1191
1192/* base85 */
1193int decode_85(char *dst, const char *line, int linelen);
1194void encode_85(char *buf, const unsigned char *data, int bytes);
1195
1196/* alloc.c */
1197extern void *alloc_blob_node(void);
1198extern void *alloc_tree_node(void);
1199extern void *alloc_commit_node(void);
1200extern void *alloc_tag_node(void);
1201extern void *alloc_object_node(void);
1202extern void alloc_report(void);
1203
1204/* trace.c */
1205__attribute__((format (printf, 1, 2)))
1206extern void trace_printf(const char *format, ...);
1207extern void trace_vprintf(const char *key, const char *format, va_list ap);
1208__attribute__((format (printf, 2, 3)))
1209extern void trace_argv_printf(const char **argv, const char *format, ...);
1210extern void trace_repo_setup(const char *prefix);
1211extern int trace_want(const char *key);
1212extern void trace_strbuf(const char *key, const struct strbuf *buf);
1213
1214void packet_trace_identity(const char *prog);
1215
1216/* add */
1217/*
1218 * return 0 if success, 1 - if addition of a file failed and
1219 * ADD_FILES_IGNORE_ERRORS was specified in flags
1220 */
1221int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1222
1223/* diff.c */
1224extern int diff_auto_refresh_index;
1225
1226/* match-trees.c */
1227void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1228void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1229
1230/*
1231 * whitespace rules.
1232 * used by both diff and apply
1233 * last two digits are tab width
1234 */
1235#define WS_BLANK_AT_EOL 0100
1236#define WS_SPACE_BEFORE_TAB 0200
1237#define WS_INDENT_WITH_NON_TAB 0400
1238#define WS_CR_AT_EOL 01000
1239#define WS_BLANK_AT_EOF 02000
1240#define WS_TAB_IN_INDENT 04000
1241#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1242#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1243#define WS_TAB_WIDTH_MASK 077
1244extern unsigned whitespace_rule_cfg;
1245extern unsigned whitespace_rule(const char *);
1246extern unsigned parse_whitespace_rule(const char *);
1247extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1248extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1249extern char *whitespace_error_string(unsigned ws);
1250extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1251extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1252#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1253
1254/* ls-files */
1255int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1256void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1257
1258char *alias_lookup(const char *alias);
1259int split_cmdline(char *cmdline, const char ***argv);
1260/* Takes a negative value returned by split_cmdline */
1261const char *split_cmdline_strerror(int cmdline_errno);
1262
1263/* git.c */
1264struct startup_info {
1265 int have_repository;
1266 const char *prefix;
1267};
1268extern struct startup_info *startup_info;
1269
1270/* builtin/merge.c */
1271int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1272
1273int sane_execvp(const char *file, char *const argv[]);
1274
1275#endif /* CACHE_H */