Refactor working tree setup
[git/git.git] / cache.h
CommitLineData
e83c5163
LT
1#ifndef CACHE_H
2#define CACHE_H
3
4050c0df 4#include "git-compat-util.h"
5ecd293d 5#include "strbuf.h"
e83c5163 6
cef661fc 7#include SHA1_HEADER
e83c5163
LT
8#include <zlib.h>
9
9da3acfb
ET
10#if ZLIB_VERNUM < 0x1200
11#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
12#endif
13
962554c6 14#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
b6829693
ET
15#define DTYPE(de) ((de)->d_type)
16#else
0bdd79af
JH
17#undef DT_UNKNOWN
18#undef DT_DIR
19#undef DT_REG
20#undef DT_LNK
b6829693
ET
21#define DT_UNKNOWN 0
22#define DT_DIR 1
23#define DT_REG 2
a15c1c60 24#define DT_LNK 3
b6829693
ET
25#define DTYPE(de) DT_UNKNOWN
26#endif
27
40689ae1
MK
28/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
29#define S_IFINVALID 0030000
30
9eec4795
LT
31/*
32 * A "directory link" is a link to another git directory.
33 *
34 * The value 0160000 is not normally a valid mode, and
35 * also just happens to be S_IFDIR + S_IFLNK
36 *
37 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
38 * always having the same values everywhere. We should use
39 * our internal git values for these things, and then we can
40 * translate that to the OS-specific value. It just so
41 * happens that everybody shares the same bit representation
42 * in the UNIX world (and apparently wider too..)
43 */
302b9282
MW
44#define S_IFGITLINK 0160000
45#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
9eec4795 46
2386d658
LT
47/*
48 * Intensive research over the course of many years has shown that
49 * port 9418 is totally unused by anything else. Or
50 *
51 * Your search - "port 9418" - did not match any documents.
52 *
53 * as www.google.com puts it.
ba8a4970
LT
54 *
55 * This port has been properly assigned for git use by IANA:
56 * git (Assigned-9418) [I06-050728-0001].
57 *
58 * git 9418/tcp git pack transfer service
59 * git 9418/udp git pack transfer service
60 *
61 * with Linus Torvalds <torvalds@osdl.org> as the point of
62 * contact. September 2005.
63 *
64 * See http://www.iana.org/assignments/port-numbers
2386d658
LT
65 */
66#define DEFAULT_GIT_PORT 9418
67
e83c5163
LT
68/*
69 * Basic data structures for the directory cache
e83c5163
LT
70 */
71
72#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
73struct cache_header {
ccc4feb5
LT
74 unsigned int hdr_signature;
75 unsigned int hdr_version;
76 unsigned int hdr_entries;
e83c5163
LT
77};
78
79/*
80 * The "cache_time" is just the low 32 bits of the
81 * time. It doesn't matter if it overflows - we only
82 * check it for equality in the 32 bits we save.
83 */
84struct cache_time {
85 unsigned int sec;
86 unsigned int nsec;
87};
88
89/*
90 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
91 * Again - this is just a (very strong in practice) heuristic that
92 * the inode hasn't changed.
ccc4feb5
LT
93 *
94 * We save the fields in big-endian order to allow using the
95 * index file over NFS transparently.
e83c5163
LT
96 */
97struct cache_entry {
ccc4feb5
LT
98 struct cache_time ce_ctime;
99 struct cache_time ce_mtime;
100 unsigned int ce_dev;
101 unsigned int ce_ino;
102 unsigned int ce_mode;
103 unsigned int ce_uid;
104 unsigned int ce_gid;
105 unsigned int ce_size;
e83c5163 106 unsigned char sha1[20];
f5cabd13 107 unsigned short ce_flags;
8f1d2e6f 108 char name[FLEX_ARRAY]; /* more */
e83c5163
LT
109};
110
95fd5bf8
LT
111#define CE_NAMEMASK (0x0fff)
112#define CE_STAGEMASK (0x3000)
220a0b52 113#define CE_UPDATE (0x4000)
5f73076c 114#define CE_VALID (0x8000)
aee46198 115#define CE_STAGESHIFT 12
95fd5bf8 116
aee46198
JH
117#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
118#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
119#define ce_size(ce) cache_entry_size(ce_namelen(ce))
120#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
121
e4479470 122#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
8ae0a8c5
KS
123static inline unsigned int create_ce_mode(unsigned int mode)
124{
8ae0a8c5
KS
125 if (S_ISLNK(mode))
126 return htonl(S_IFLNK);
302b9282
MW
127 if (S_ISDIR(mode) || S_ISGITLINK(mode))
128 return htonl(S_IFGITLINK);
db823d4a 129 return htonl(S_IFREG | ce_permissions(mode));
8ae0a8c5 130}
185c975f
JH
131static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
132{
78a8d641
JS
133 extern int trust_executable_bit, has_symlinks;
134 if (!has_symlinks && S_ISREG(mode) &&
135 ce && S_ISLNK(ntohl(ce->ce_mode)))
136 return ce->ce_mode;
185c975f
JH
137 if (!trust_executable_bit && S_ISREG(mode)) {
138 if (ce && S_ISREG(ntohl(ce->ce_mode)))
139 return ce->ce_mode;
140 return create_ce_mode(0666);
141 }
142 return create_ce_mode(mode);
143}
1b0c7174
JH
144#define canon_mode(mode) \
145 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
302b9282 146 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
e4479470 147
aee46198 148#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
f5cabd13 149
228e94f9
JH
150struct index_state {
151 struct cache_entry **cache;
152 unsigned int cache_nr, cache_alloc, cache_changed;
153 struct cache_tree *cache_tree;
154 time_t timestamp;
155 void *mmap;
156 size_t mmap_size;
157};
158
159extern struct index_state the_index;
160
4aab5b46 161#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
228e94f9
JH
162#define active_cache (the_index.cache)
163#define active_nr (the_index.cache_nr)
164#define active_alloc (the_index.cache_alloc)
165#define active_cache_changed (the_index.cache_changed)
166#define active_cache_tree (the_index.cache_tree)
e83c5163 167
4aab5b46
JH
168#define read_cache() read_index(&the_index)
169#define read_cache_from(path) read_index_from(&the_index, (path))
170#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
171#define discard_cache() discard_index(&the_index)
172#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
173#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
174#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
175#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
176#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
d616813d 177#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
4aab5b46
JH
178#define ce_match_stat(ce, st, really) ie_match_stat(&the_index, (ce), (st), (really))
179#define ce_modified(ce, st, really) ie_modified(&the_index, (ce), (st), (really))
180#endif
e83c5163 181
edaec3fb
JH
182enum object_type {
183 OBJ_BAD = -1,
184 OBJ_NONE = 0,
185 OBJ_COMMIT = 1,
186 OBJ_TREE = 2,
187 OBJ_BLOB = 3,
188 OBJ_TAG = 4,
189 /* 5 for future expansion */
190 OBJ_OFS_DELTA = 6,
191 OBJ_REF_DELTA = 7,
192 OBJ_MAX,
193};
194
8ac069ac 195#define GIT_DIR_ENVIRONMENT "GIT_DIR"
892c41b9 196#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
8ac069ac 197#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
d19938ab 198#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
bb233d69 199#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
5da5c8f4 200#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
d4ebc36c
JH
201#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
202#define CONFIG_ENVIRONMENT "GIT_CONFIG"
203#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
204#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
d0bfd026
JH
205#define GITATTRIBUTES_FILE ".gitattributes"
206#define INFOATTRIBUTES_FILE "info/attributes"
f48fd688 207#define ATTRIBUTE_MACRO_PREFIX "[attr]"
bb233d69 208
7d1864ce
JH
209extern int is_bare_repository_cfg;
210extern int is_bare_repository(void);
68025633 211extern int is_inside_git_dir(void);
e90fdc39 212extern char *git_work_tree_cfg;
892c41b9 213extern int is_inside_work_tree(void);
c5fba16c 214extern const char *get_git_dir(void);
8ac069ac 215extern char *get_object_directory(void);
95fc7512 216extern char *get_refs_directory(void);
8ac069ac 217extern char *get_index_file(void);
5da5c8f4 218extern char *get_graft_file(void);
d7ac12b2 219extern int set_git_dir(const char *path);
e90fdc39 220extern const char *get_git_work_tree(void);
8ac069ac
JH
221
222#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
bb233d69 223
6b5ee137 224extern const char **get_pathspec(const char *prefix, const char **pathspec);
59f0f2f3 225extern void setup_work_tree(void);
4ca06608 226extern const char *setup_git_directory_gently(int *);
d288a700 227extern const char *setup_git_directory(void);
6b5ee137 228extern const char *prefix_path(const char *prefix, int len, const char *path);
4ca06608 229extern const char *prefix_filename(const char *prefix, int len, const char *path);
e23d0b4a 230extern void verify_filename(const char *prefix, const char *name);
ea92f41f 231extern void verify_non_filename(const char *prefix, const char *name);
d288a700 232
e83c5163
LT
233#define alloc_nr(x) (((x)+16)*3/2)
234
6815e569
JK
235/*
236 * Realloc the buffer pointed at by variable 'x' so that it can hold
237 * at least 'nr' entries; the number of entries currently allocated
238 * is 'alloc', using the standard growing factor alloc_nr() macro.
239 *
240 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
241 */
242#define ALLOC_GROW(x, nr, alloc) \
243 do { \
c927e6c6 244 if ((nr) > alloc) { \
4234a761
JH
245 if (alloc_nr(alloc) < (nr)) \
246 alloc = (nr); \
247 else \
248 alloc = alloc_nr(alloc); \
6815e569
JK
249 x = xrealloc((x), alloc * sizeof(*(x))); \
250 } \
251 } while(0)
252
734aab75 253/* Initialize and use the cache information */
4aab5b46
JH
254extern int read_index(struct index_state *);
255extern int read_index_from(struct index_state *, const char *path);
256extern int write_index(struct index_state *, int newfd);
257extern int discard_index(struct index_state *);
8dcf39c4 258extern int verify_path(const char *path);
4aab5b46 259extern int index_name_pos(struct index_state *, const char *name, int namelen);
192268c1
JH
260#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
261#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
b155725d 262#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
af3785dc 263#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
4aab5b46 264extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
8fd2cb40 265extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
4aab5b46
JH
266extern int remove_index_entry_at(struct index_state *, int pos);
267extern int remove_file_from_index(struct index_state *, const char *path);
268extern int add_file_to_index(struct index_state *, const char *path, int verbose);
6640f881 269extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
dbbce55b 270extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
4aab5b46
JH
271extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, int);
272extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, int);
c0fd1f51 273extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
53bca91a 274extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
024510c8 275extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
ec1fcc16 276extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
415e96c8
JH
277extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
278
405e5b2f
LT
279#define REFRESH_REALLY 0x0001 /* ignore_valid */
280#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
281#define REFRESH_QUIET 0x0004 /* be quiet about it */
282#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
d616813d 283extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
405e5b2f 284
021b6e45
JH
285struct lock_file {
286 struct lock_file *next;
5e635e39 287 pid_t owner;
1084b845 288 char on_list;
021b6e45 289 char filename[PATH_MAX];
415e96c8 290};
40aaae88 291extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
021b6e45 292extern int commit_lock_file(struct lock_file *);
30ca07a2
JH
293
294extern int hold_locked_index(struct lock_file *, int);
295extern int commit_locked_index(struct lock_file *);
5e7f56ac 296extern void set_alternate_index_output(const char *);
30ca07a2 297
021b6e45 298extern void rollback_lock_file(struct lock_file *);
1401f46b 299extern int delete_ref(const char *, const unsigned char *sha1);
734aab75 300
2ae1c53b 301/* Environment bits from configuration mechanism */
17712991 302extern int trust_executable_bit;
9378c161 303extern int quote_path_fully;
78a8d641 304extern int has_symlinks;
5f73076c 305extern int assume_unchanged;
9f0bb90d 306extern int prefer_symlink_refs;
6de08ae6 307extern int log_all_ref_updates;
2f8acdb3 308extern int warn_ambiguous_refs;
457f06d6 309extern int shared_repository;
2ae1c53b 310extern const char *apply_default_whitespace;
12f6c308 311extern int zlib_compression_level;
960ccca6
DH
312extern int core_compression_level;
313extern int core_compression_seen;
60bb8b14 314extern size_t packed_git_window_size;
77ccc5bb 315extern size_t packed_git_limit;
18bdec11 316extern size_t delta_base_cache_limit;
6c510bee 317extern int auto_crlf;
17712991 318
ab9cb76f
JH
319#define GIT_REPO_VERSION 0
320extern int repository_format_version;
321extern int check_repository_format(void);
322
734aab75
LT
323#define MTIME_CHANGED 0x0001
324#define CTIME_CHANGED 0x0002
325#define OWNER_CHANGED 0x0004
326#define MODE_CHANGED 0x0008
327#define INODE_CHANGED 0x0010
328#define DATA_CHANGED 0x0020
8ae0a8c5 329#define TYPE_CHANGED 0x0040
e83c5163
LT
330
331/* Return a statically allocated filename matching the sha1 signature */
4ec99bf0
TS
332extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
333extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
73134b6d 334extern char *sha1_file_name(const unsigned char *sha1);
bf592c50
DB
335extern char *sha1_pack_name(const unsigned char *sha1);
336extern char *sha1_pack_index_name(const unsigned char *sha1);
013f276e 337extern const char *find_unique_abbrev(const unsigned char *sha1, int);
88cd621d 338extern const unsigned char null_sha1[20];
0bef57ee
DR
339static inline int is_null_sha1(const unsigned char *sha1)
340{
341 return !memcmp(sha1, null_sha1, 20);
342}
a89fccd2
DR
343static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
344{
345 return memcmp(sha1, sha2, 20);
346}
e702496e
SP
347static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
348{
349 memcpy(sha_dst, sha_src, 20);
350}
a8e0d16d
JH
351static inline void hashclr(unsigned char *hash)
352{
353 memset(hash, 0, 20);
354}
e83c5163 355
f2db68ed
HE
356int git_mkstemp(char *path, size_t n, const char *template);
357
94df2506
JH
358enum sharedrepo {
359 PERM_UMASK = 0,
360 PERM_GROUP,
361 PERM_EVERYBODY
362};
363int git_config_perm(const char *var, const char *value);
457f06d6 364int adjust_shared_perm(const char *path);
b2cb9425 365int safe_create_leading_directories(char *path);
bd22c904 366char *enter_repo(char *path, int strict);
e5392c51
JS
367static inline int is_absolute_path(const char *path)
368{
369 return path[0] == '/';
370}
371const char *make_absolute_path(const char *path);
b2cb9425 372
e83c5163 373/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
21666f1a 374extern int sha1_object_info(const unsigned char *, unsigned long *);
21666f1a 375extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
ce9fbf16 376extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
bf0f910d 377extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
21666f1a 378extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
8237b185 379
5d6ccf5c 380extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
e83c5163 381
70b9829e
DB
382extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
383 size_t bufsize, size_t *bufposn);
a5eda52b 384extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
839837b9 385extern int move_temp_to_file(const char *tmpfile, const char *filename);
8237b185 386
106d710b 387extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
8237b185
DB
388extern int has_sha1_file(const unsigned char *sha1);
389
bf592c50
DB
390extern int has_pack_file(const unsigned char *sha1);
391extern int has_pack_index(const unsigned char *sha1);
392
192a6be2
LT
393extern const signed char hexval_table[256];
394static inline unsigned int hexval(unsigned char c)
e49521b5
JH
395{
396 return hexval_table[c];
397}
398
e83c5163 399/* Convert to/from hex/sha1 representation */
46a6c262
JH
400#define MINIMUM_ABBREV 4
401#define DEFAULT_ABBREV 7
402
3c249c95 403extern int get_sha1(const char *str, unsigned char *sha1);
a0cd87a5 404extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
197ee8c9
LT
405extern int get_sha1_hex(const char *hex, unsigned char *sha1);
406extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
ca8db142 407extern int read_ref(const char *filename, unsigned char *sha1);
8da19775 408extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
e86eb666 409extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
eb3a4822 410extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
e86eb666 411
8b5157e4 412extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
c847f537 413extern int validate_headref(const char *ref);
e83c5163 414
958ba6c9 415extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
79517a06 416extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
e83c5163 417
40469ee9 418extern void *read_object_with_reference(const unsigned char *sha1,
bf0f910d 419 const char *required_type,
40469ee9
JH
420 unsigned long *size,
421 unsigned char *sha1_ret);
f4913f91 422
73013afd
JH
423enum date_mode {
424 DATE_NORMAL = 0,
425 DATE_RELATIVE,
426 DATE_SHORT,
427 DATE_LOCAL,
428 DATE_ISO8601,
429 DATE_RFC2822
430};
431
f8493ec0 432const char *show_date(unsigned long time, int timezone, enum date_mode mode);
2a39064c 433int parse_date(const char *date, char *buf, int bufsize);
ecee9d9e 434void datestamp(char *buf, int bufsize);
3c07b1d1 435unsigned long approxidate(const char *);
856665f8 436enum date_mode parse_date_format(const char *format);
ecee9d9e 437
749be728
JH
438extern const char *git_author_info(int);
439extern const char *git_committer_info(int);
798123af 440extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
6aa33f40 441
12dccc16
LT
442struct checkout {
443 const char *base_dir;
444 int base_dir_len;
445 unsigned force:1,
446 quiet:1,
447 not_new:1,
448 refresh_cache:1;
449};
450
efbc5831 451extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
f859c846 452extern int has_symlink_leading_path(const char *name, char *last_symlink);
12dccc16 453
9a217f2a 454extern struct alternate_object_database {
d5a63b99 455 struct alternate_object_database *next;
9a217f2a 456 char *name;
8f1d2e6f 457 char base[FLEX_ARRAY]; /* more */
d5a63b99 458} *alt_odb_list;
9a217f2a
JH
459extern void prepare_alt_odb(void);
460
c41ee586
SP
461struct pack_window {
462 struct pack_window *next;
463 unsigned char *base;
464 off_t offset;
465 size_t len;
466 unsigned int last_used;
467 unsigned int inuse_cnt;
468};
469
9a217f2a
JH
470extern struct packed_git {
471 struct packed_git *next;
c41ee586 472 struct pack_window *windows;
2dc3a234 473 off_t pack_size;
57059091
NP
474 const void *index_data;
475 size_t index_size;
476 uint32_t num_objects;
42873078 477 int index_version;
57059091 478 time_t mtime;
9bc879c1 479 int pack_fd;
9d835df2 480 int pack_local;
bf592c50 481 unsigned char sha1[20];
8f1d2e6f
JH
482 /* something like ".git/objects/pack/xxxxx.pack" */
483 char pack_name[FLEX_ARRAY]; /* more */
9a217f2a 484} *packed_git;
f3bf9224
JH
485
486struct pack_entry {
c4001d92 487 off_t offset;
f3bf9224
JH
488 unsigned char sha1[20];
489 struct packed_git *p;
490};
491
d1c133f5
LT
492struct ref {
493 struct ref *next;
494 unsigned char old_sha1[20];
495 unsigned char new_sha1[20];
ff27adf3 496 unsigned char force;
b888d61c 497 unsigned char merge;
f88395ac 498 struct ref *peer_ref; /* when renaming */
8f1d2e6f 499 char name[FLEX_ARRAY]; /* more */
d1c133f5
LT
500};
501
2718ff09
LT
502#define REF_NORMAL (1u << 0)
503#define REF_HEADS (1u << 1)
504#define REF_TAGS (1u << 2)
505
7841ce79 506#define CONNECT_VERBOSE (1u << 0)
98158e9c
JS
507extern struct child_process *git_connect(int fd[2], char *url, const char *prog, int flags);
508extern int finish_connect(struct child_process *conn);
013e7c7f 509extern int path_match(const char *path, int nr, char **match);
41cb7488 510extern int get_ack(int fd, unsigned char *result_sha1);
2718ff09 511extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
211b5f9e 512extern int server_supports(const char *feature);
f7192598 513
bf592c50 514extern struct packed_git *parse_pack_index(unsigned char *sha1);
2ab141a2 515extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
42873078 516 const char *idx_path);
bf592c50 517
9a217f2a 518extern void prepare_packed_git(void);
fc04c412 519extern void reprepare_packed_git(void);
bf592c50
DB
520extern void install_packed_git(struct packed_git *pack);
521
a6080a0a 522extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
bf592c50
DB
523 struct packed_git *packs);
524
276bc2ca 525extern void pack_report(void);
d079837e 526extern int open_pack_index(struct packed_git *);
c4001d92 527extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
03e79c88 528extern void unuse_pack(struct pack_window **);
42873078 529extern struct packed_git *add_packed_git(const char *, int, int);
d079837e 530extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
c4001d92
SP
531extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
532extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
72518e9c 533extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
54dab52a 534extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
c4001d92 535extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
000dfd3f 536extern int matches_pack_name(struct packed_git *p, const char *name);
9a217f2a 537
8f3f9b09
JH
538/* Dumb servers support */
539extern int update_server_info(int);
540
17712991
LT
541typedef int (*config_fn_t)(const char *, const char *);
542extern int git_default_config(const char *, const char *);
4f629539 543extern int git_config_from_file(config_fn_t fn, const char *);
17712991 544extern int git_config(config_fn_t fn);
0b87b6e0
BD
545extern int git_parse_long(const char *, long *);
546extern int git_parse_ulong(const char *, unsigned long *);
17712991 547extern int git_config_int(const char *, const char *);
0b87b6e0 548extern unsigned long git_config_ulong(const char *, const char *);
17712991 549extern int git_config_bool(const char *, const char *);
10bea152 550extern int git_config_set(const char *, const char *);
4ddba79d 551extern int git_config_set_multivar(const char *, const char *, const char *, int);
0667fcfb 552extern int git_config_rename_section(const char *, const char *);
ab9cb76f 553extern int check_repository_format_version(const char *var, const char *value);
17712991 554
e1b10391
LT
555#define MAX_GITNAME (1000)
556extern char git_default_email[MAX_GITNAME];
557extern char git_default_name[MAX_GITNAME];
558
1a8f2741 559extern const char *git_commit_encoding;
3a55602e 560extern const char *git_log_output_encoding;
4e72dcec 561
06f59e9f
TT
562/* IO helper functions */
563extern void maybe_flush_or_die(FILE *, const char *);
f3123c4a 564extern int copy_fd(int ifd, int ofd);
93d26e4c 565extern int read_in_full(int fd, void *buf, size_t count);
e0814056 566extern int write_in_full(int fd, const void *buf, size_t count);
7230e6d0 567extern void write_or_die(int fd, const void *buf, size_t count);
6ce4e61f 568extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
e0814056 569extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
ad897215 570
f67b45f8
LT
571/* pager.c */
572extern void setup_pager(void);
54adf370 573extern char *pager_program;
85fb65ed 574extern int pager_in_use;
aa086eb8 575extern int pager_use_color;
f67b45f8 576
4d87b9c5
JS
577extern char *editor_program;
578
051308f6 579/* base85 */
f9815772
JM
580int decode_85(char *dst, const char *line, int linelen);
581void encode_85(char *buf, const unsigned char *data, int bytes);
051308f6 582
855419f7 583/* alloc.c */
100c5f3b
LT
584extern void *alloc_blob_node(void);
585extern void *alloc_tree_node(void);
586extern void *alloc_commit_node(void);
587extern void *alloc_tag_node(void);
588extern void *alloc_object_node(void);
855419f7
LT
589extern void alloc_report(void);
590
6ce4e61f 591/* trace.c */
6ce4e61f
CC
592extern void trace_printf(const char *format, ...);
593extern void trace_argv_printf(const char **argv, int count, const char *format, ...);
594
6c510bee 595/* convert.c */
5ecd293d
PH
596/* returns 1 if *dst was used */
597extern int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst);
598extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
6c510bee 599
aecbf914
JH
600/* diff.c */
601extern int diff_auto_refresh_index;
602
68faf689
JH
603/* match-trees.c */
604void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
605
e83c5163 606#endif /* CACHE_H */