summaryrefslogtreecommitdiffstats
path: root/config.h
blob: 14f881ecfaf6b264b6d120205ab509f2ee5930f2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
#ifndef CONFIG_H
#define CONFIG_H

#include "hashmap.h"
#include "string-list.h"
#include "repository.h"
#include "parse.h"

/**
 * The config API gives callers a way to access Git configuration files
 * (and files which have the same syntax).
 *
 * General Usage
 * -------------
 *
 * Config files are parsed linearly, and each variable found is passed to a
 * caller-provided callback function. The callback function is responsible
 * for any actions to be taken on the config option, and is free to ignore
 * some options. It is not uncommon for the configuration to be parsed
 * several times during the run of a Git program, with different callbacks
 * picking out different variables useful to themselves.
 */

struct object_id;

/* git_config_parse_key() returns these negated: */
#define CONFIG_INVALID_KEY 1
#define CONFIG_NO_SECTION_OR_NAME 2
/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */
#define CONFIG_NO_LOCK -1
#define CONFIG_INVALID_FILE 3
#define CONFIG_NO_WRITE 4
#define CONFIG_NOTHING_SET 5
#define CONFIG_INVALID_PATTERN 6
#define CONFIG_GENERIC_ERROR 7

#define CONFIG_REGEX_NONE ((void *)1)

enum config_scope {
	CONFIG_SCOPE_UNKNOWN = 0,
	CONFIG_SCOPE_SYSTEM,
	CONFIG_SCOPE_GLOBAL,
	CONFIG_SCOPE_LOCAL,
	CONFIG_SCOPE_WORKTREE,
	CONFIG_SCOPE_COMMAND,
	CONFIG_SCOPE_SUBMODULE,
};
const char *config_scope_name(enum config_scope scope);

struct git_config_source {
	unsigned int use_stdin:1;
	const char *file;
	const char *blob;
	enum config_scope scope;
};

enum config_origin_type {
	CONFIG_ORIGIN_UNKNOWN = 0,
	CONFIG_ORIGIN_BLOB,
	CONFIG_ORIGIN_FILE,
	CONFIG_ORIGIN_STDIN,
	CONFIG_ORIGIN_SUBMODULE_BLOB,
	CONFIG_ORIGIN_CMDLINE
};

enum config_event_t {
	CONFIG_EVENT_SECTION,
	CONFIG_EVENT_ENTRY,
	CONFIG_EVENT_WHITESPACE,
	CONFIG_EVENT_COMMENT,
	CONFIG_EVENT_EOF,
	CONFIG_EVENT_ERROR
};

struct config_source;
/*
 * The parser event function (if not NULL) is called with the event type and
 * the begin/end offsets of the parsed elements.
 *
 * Note: for CONFIG_EVENT_ENTRY (i.e. config variables), the trailing newline
 * character is considered part of the element.
 */
typedef int (*config_parser_event_fn_t)(enum config_event_t type,
					size_t begin_offset, size_t end_offset,
					struct config_source *cs,
					void *event_fn_data);

struct config_options {
	unsigned int respect_includes : 1;
	unsigned int ignore_repo : 1;
	unsigned int ignore_worktree : 1;
	unsigned int ignore_cmdline : 1;
	unsigned int system_gently : 1;

	/*
	 * For internal use. Include all includeif.hasremoteurl paths without
	 * checking if the repo has that remote URL, and when doing so, verify
	 * that files included in this way do not configure any remote URLs
	 * themselves.
	 */
	unsigned int unconditional_remote_url : 1;

	const char *commondir;
	const char *git_dir;
	/*
	 * event_fn and event_fn_data are for internal use only. Handles events
	 * emitted by the config parser.
	 */
	config_parser_event_fn_t event_fn;
	void *event_fn_data;
	enum config_error_action {
		CONFIG_ERROR_UNSET = 0, /* use source-specific default */
		CONFIG_ERROR_DIE, /* die() on error */
		CONFIG_ERROR_ERROR, /* error() on error, return -1 */
		CONFIG_ERROR_SILENT, /* return -1 */
	} error_action;
};

/* Config source metadata for a given config key-value pair */
struct key_value_info {
	const char *filename;
	int linenr;
	enum config_origin_type origin_type;
	enum config_scope scope;
	const char *path;
};
#define KVI_INIT { \
	.filename = NULL, \
	.linenr = -1, \
	.origin_type = CONFIG_ORIGIN_UNKNOWN, \
	.scope = CONFIG_SCOPE_UNKNOWN, \
	.path = NULL, \
}

/* Captures additional information that a config callback can use. */
struct config_context {
	/* Config source metadata for key and value. */
	const struct key_value_info *kvi;
};
#define CONFIG_CONTEXT_INIT { 0 }

/**
 * A config callback function takes four parameters:
 *
 * - the name of the parsed variable. This is in canonical "flat" form: the
 *   section, subsection, and variable segments will be separated by dots,
 *   and the section and variable segments will be all lowercase. E.g.,
 *   `core.ignorecase`, `diff.SomeType.textconv`.
 *
 * - the value of the found variable, as a string. If the variable had no
 *   value specified, the value will be NULL (typically this means it
 *   should be interpreted as boolean true).
 *
 * - the 'config context', that is, additional information about the config
 *   iteration operation provided by the config machinery. For example, this
 *   includes information about the config source being parsed (e.g. the
 *   filename).
 *
 * - a void pointer passed in by the caller of the config API; this can
 *   contain callback-specific data
 *
 * A config callback should return 0 for success, or -1 if the variable
 * could not be parsed properly.
 */
typedef int (*config_fn_t)(const char *, const char *,
			   const struct config_context *, void *);

int git_default_config(const char *, const char *,
		       const struct config_context *, void *);

/**
 * Read a specific file in git-config format.
 * This function takes the same callback and data parameters as `git_config`.
 *
 * Unlike git_config(), this function does not respect includes.
 */
int git_config_from_file(config_fn_t fn, const char *, void *);

int git_config_from_file_with_options(config_fn_t fn, const char *,
				      void *, enum config_scope,
				      const struct config_options *);
int git_config_from_mem(config_fn_t fn,
			const enum config_origin_type,
			const char *name,
			const char *buf, size_t len,
			void *data, enum config_scope scope,
			const struct config_options *opts);
int git_config_from_blob_oid(config_fn_t fn, const char *name,
			     struct repository *repo,
			     const struct object_id *oid, void *data,
			     enum config_scope scope);
void git_config_push_parameter(const char *text);
void git_config_push_env(const char *spec);
int git_config_from_parameters(config_fn_t fn, void *data);
void read_early_config(config_fn_t cb, void *data);
void read_very_early_config(config_fn_t cb, void *data);

/**
 * Most programs will simply want to look up variables in all config files
 * that Git knows about, using the normal precedence rules. To do this,
 * call `git_config` with a callback function and void data pointer.
 *
 * `git_config` will read all config sources in order of increasing
 * priority. Thus a callback should typically overwrite previously-seen
 * entries with new ones (e.g., if both the user-wide `~/.gitconfig` and
 * repo-specific `.git/config` contain `color.ui`, the config machinery
 * will first feed the user-wide one to the callback, and then the
 * repo-specific one; by overwriting, the higher-priority repo-specific
 * value is left at the end).
 *
 * Unlike git_config_from_file(), this function respects includes.
 */
void git_config(config_fn_t fn, void *);

/**
 * Lets the caller examine config while adjusting some of the default
 * behavior of `git_config`. It should almost never be used by "regular"
 * Git code that is looking up configuration variables.
 * It is intended for advanced callers like `git-config`, which are
 * intentionally tweaking the normal config-lookup process.
 * It takes two extra parameters:
 *
 * - `config_source`
 * If this parameter is non-NULL, it specifies the source to parse for
 * configuration, rather than looking in the usual files. See `struct
 * git_config_source` in `config.h` for details. Regular `git_config` defaults
 * to `NULL`.
 *
 * - `opts`
 * Specify options to adjust the behavior of parsing config files. See `struct
 * config_options` in `config.h` for details. As an example: regular `git_config`
 * sets `opts.respect_includes` to `1` by default.
 */
int config_with_options(config_fn_t fn, void *,
			struct git_config_source *config_source,
			struct repository *repo,
			const struct config_options *opts);

/**
 * Value Parsing Helpers
 * ---------------------
 *
 * The following helper functions aid in parsing string values
 */

/**
 * Parse the string to an integer, including unit factors. Dies on error;
 * otherwise, returns the parsed result.
 */
int git_config_int(const char *, const char *, const struct key_value_info *);

int64_t git_config_int64(const char *, const char *,
			 const struct key_value_info *);

/**
 * Identical to `git_config_int`, but for unsigned longs.
 */
unsigned long git_config_ulong(const char *, const char *,
			       const struct key_value_info *);

ssize_t git_config_ssize_t(const char *, const char *,
			   const struct key_value_info *);

/**
 * Same as `git_config_bool`, except that integers are returned as-is, and
 * an `is_bool` flag is unset.
 */
int git_config_bool_or_int(const char *, const char *,
			   const struct key_value_info *, int *);

/**
 * Parse a string into a boolean value, respecting keywords like "true" and
 * "false". Integer values are converted into true/false values (when they
 * are non-zero or zero, respectively). Other values cause a die(). If
 * parsing is successful, the return value is the result.
 */
int git_config_bool(const char *, const char *);

/**
 * Allocates and copies the value string into the `dest` parameter; if no
 * string is given, prints an error message and returns -1.
 */
int git_config_string(const char **, const char *, const char *);

/**
 * Similar to `git_config_string`, but expands `~` or `~user` into the
 * user's home directory when found at the beginning of the path.
 */
int git_config_pathname(const char **, const char *, const char *);

int git_config_expiry_date(timestamp_t *, const char *, const char *);
int git_config_color(char *, const char *, const char *);
int git_config_set_in_file_gently(const char *, const char *, const char *);

/**
 * write config values to a specific config file, takes a key/value pair as
 * parameter.
 */
void git_config_set_in_file(const char *, const char *, const char *);

int git_config_set_gently(const char *, const char *);

/**
 * Write a config value that should apply to the current worktree. If
 * extensions.worktreeConfig is enabled, then the write will happen in the
 * current worktree's config. Otherwise, write to the common config file.
 */
int repo_config_set_worktree_gently(struct repository *, const char *, const char *);

/**
 * write config values to `.git/config`, takes a key/value pair as parameter.
 */
void git_config_set(const char *, const char *);

int git_config_parse_key(const char *, char **, size_t *);

/*
 * The following macros specify flag bits that alter the behavior
 * of the git_config_set_multivar*() methods.
 */

/*
 * When CONFIG_FLAGS_MULTI_REPLACE is specified, all matching key/values
 * are removed before a single new pair is written. If the flag is not
 * present, then set operations replace only the first match.
 */
#define CONFIG_FLAGS_MULTI_REPLACE (1 << 0)

/*
 * When CONFIG_FLAGS_FIXED_VALUE is specified, match key/value pairs
 * by string comparison (not regex match) to the provided value_pattern
 * parameter.
 */
#define CONFIG_FLAGS_FIXED_VALUE (1 << 1)

int git_config_set_multivar_gently(const char *, const char *, const char *, unsigned);
void git_config_set_multivar(const char *, const char *, const char *, unsigned);
int repo_config_set_multivar_gently(struct repository *, const char *, const char *, const char *, unsigned);
int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, unsigned);

/**
 * takes four parameters:
 *
 * - the name of the file, as a string, to which key/value pairs will be written.
 *
 * - the name of key, as a string. This is in canonical "flat" form: the section,
 *   subsection, and variable segments will be separated by dots, and the section
 *   and variable segments will be all lowercase.
 *   E.g., `core.ignorecase`, `diff.SomeType.textconv`.
 *
 * - the value of the variable, as a string. If value is equal to NULL, it will
 *   remove the matching key from the config file.
 *
 * - the value regex, as a string. It will disregard key/value pairs where value
 *   does not match.
 *
 * - a flags value with bits corresponding to the CONFIG_FLAG_* macros.
 *
 * It returns 0 on success.
 */
void git_config_set_multivar_in_file(const char *config_filename,
				     const char *key,
				     const char *value,
				     const char *value_pattern,
				     unsigned flags);

/**
 * rename or remove sections in the config file
 * parameters `old_name` and `new_name`
 * If NULL is passed through `new_name` parameter,
 * the section will be removed from the config file.
 */
int git_config_rename_section(const char *, const char *);

int git_config_rename_section_in_file(const char *, const char *, const char *);
int git_config_copy_section(const char *, const char *);
int git_config_copy_section_in_file(const char *, const char *, const char *);
int git_config_system(void);
int config_error_nonbool(const char *);
#if defined(__GNUC__)
#define config_error_nonbool(s) (config_error_nonbool(s), const_error())
#endif

char *git_system_config(void);
void git_global_config(char **user, char **xdg);

int git_config_parse_parameter(const char *, config_fn_t fn, void *data);

const char *config_origin_type_name(enum config_origin_type type);
void kvi_from_param(struct key_value_info *out);

/*
 * Match and parse a config key of the form:
 *
 *   section.(subsection.)?key
 *
 * (i.e., what gets handed to a config_fn_t). The caller provides the section;
 * we return -1 if it does not match, 0 otherwise. The subsection and key
 * out-parameters are filled by the function (and *subsection is NULL if it is
 * missing).
 *
 * If the subsection pointer-to-pointer passed in is NULL, returns 0 only if
 * there is no subsection at all.
 */
int parse_config_key(const char *var,
		     const char *section,
		     const char **subsection, size_t *subsection_len,
		     const char **key);

/**
 * Custom Configsets
 * -----------------
 *
 * A `config_set` can be used to construct an in-memory cache for
 * config-like files that the caller specifies (i.e., files like `.gitmodules`,
 * `~/.gitconfig` etc.). For example,
 *
 * ----------------------------------------
 * struct config_set gm_config;
 * git_configset_init(&gm_config);
 * int b;
 * //we add config files to the config_set
 * git_configset_add_file(&gm_config, ".gitmodules");
 * git_configset_add_file(&gm_config, ".gitmodules_alt");
 *
 * if (!git_configset_get_bool(gm_config, "submodule.frotz.ignore", &b)) {
 * //hack hack hack
 * }
 *
 * when we are done with the configset:
 * git_configset_clear(&gm_config);
 * ----------------------------------------
 *
 * Configset API provides functions for the above mentioned work flow
 */

struct config_set_element {
	struct hashmap_entry ent;
	char *key;
	struct string_list value_list;
};

struct configset_list_item {
	struct config_set_element *e;
	int value_index;
};

/*
 * the contents of the list are ordered according to their
 * position in the config files and order of parsing the files.
 * (i.e. key-value pair at the last position of .git/config will
 * be at the last item of the list)
 */
struct configset_list {
	struct configset_list_item *items;
	unsigned int nr, alloc;
};

struct config_set {
	struct hashmap config_hash;
	int hash_initialized;
	struct configset_list list;
};

/**
 * Initializes the config_set `cs`.
 */
void git_configset_init(struct config_set *cs);

/**
 * Parses the file and adds the variable-value pairs to the `config_set`,
 * dies if there is an error in parsing the file. Returns 0 on success, or
 * -1 if the file does not exist or is inaccessible. The caller decides
 * whether to free the incomplete configset or continue using it when
 * the function returns -1.
 */
int git_configset_add_file(struct config_set *cs, const char *filename);

/**
 * Finds and returns the value list, sorted in order of increasing priority
 * for the configuration variable `key` and config set `cs`. When the
 * configuration variable `key` is not found, returns 1 without touching
 * `value`.
 *
 * The key will be parsed for validity with git_config_parse_key(), on
 * error a negative value will be returned.
 *
 * The caller should not free or modify the returned pointer, as it is
 * owned by the cache.
 */
RESULT_MUST_BE_USED
int git_configset_get_value_multi(struct config_set *cs, const char *key,
				  const struct string_list **dest);

/**
 * A validation wrapper for git_configset_get_value_multi() which does
 * for it what git_configset_get_string() does for
 * git_configset_get_value().
 *
 * The configuration syntax allows for "[section] key", which will
 * give us a NULL entry in the "struct string_list", as opposed to
 * "[section] key =" which is the empty string. Most users of the API
 * are not prepared to handle NULL in a "struct string_list".
 */
int git_configset_get_string_multi(struct config_set *cs, const char *key,
				   const struct string_list **dest);

/**
 * Clears `config_set` structure, removes all saved variable-value pairs.
 */
void git_configset_clear(struct config_set *cs);

/*
 * These functions return 1 if not found, and 0 if found, leaving the found
 * value in the 'dest' pointer.
 */

/**
 * git_configset_get() returns negative values on error, see
 * repo_config_get() below.
 */
RESULT_MUST_BE_USED
int git_configset_get(struct config_set *cs, const char *key);

/*
 * Finds the highest-priority value for the configuration variable `key`
 * and config set `cs`, stores the pointer to it in `value` and returns 0.
 * When the configuration variable `key` is not found, returns 1 without
 * touching `value`. The caller should not free or modify `value`, as it
 * is owned by the cache.
 */
int git_configset_get_value(struct config_set *cs, const char *key,
			    const char **dest, struct key_value_info *kvi);

int git_configset_get_string(struct config_set *cs, const char *key, char **dest);
int git_configset_get_int(struct config_set *cs, const char *key, int *dest);
int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest);
int git_configset_get_bool(struct config_set *cs, const char *key, int *dest);
int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest);
int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest);
int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest);

/* Functions for reading a repository's config */
struct repository;
void repo_config(struct repository *repo, config_fn_t fn, void *data);

/**
 * Run only the discover part of the repo_config_get_*() functions
 * below, in addition to 1 if not found, returns negative values on
 * error (e.g. if the key itself is invalid).
 */
RESULT_MUST_BE_USED
int repo_config_get(struct repository *repo, const char *key);
int repo_config_get_value(struct repository *repo,
			  const char *key, const char **value);
RESULT_MUST_BE_USED
int repo_config_get_value_multi(struct repository *repo, const char *key,
				const struct string_list **dest);
RESULT_MUST_BE_USED
int repo_config_get_string_multi(struct repository *repo, const char *key,
				 const struct string_list **dest);
int repo_config_get_string(struct repository *repo,
			   const char *key, char **dest);
int repo_config_get_string_tmp(struct repository *repo,
			       const char *key, const char **dest);
int repo_config_get_int(struct repository *repo,
			const char *key, int *dest);
int repo_config_get_ulong(struct repository *repo,
			  const char *key, unsigned long *dest);
int repo_config_get_bool(struct repository *repo,
			 const char *key, int *dest);
int repo_config_get_bool_or_int(struct repository *repo,
				const char *key, int *is_bool, int *dest);
int repo_config_get_maybe_bool(struct repository *repo,
			       const char *key, int *dest);
int repo_config_get_pathname(struct repository *repo,
			     const char *key, const char **dest);

/*
 * Functions for reading protected config. By definition, protected
 * config ignores repository config, so these do not take a `struct
 * repository` parameter.
 */
void git_protected_config(config_fn_t fn, void *data);

/**
 * Querying For Specific Variables
 * -------------------------------
 *
 * For programs wanting to query for specific variables in a non-callback
 * manner, the config API provides two functions `git_config_get_value`
 * and `git_config_get_value_multi`. They both read values from an internal
 * cache generated previously from reading the config files.
 *
 * For those git_config_get*() functions that aren't documented,
 * consult the corresponding repo_config_get*() function's
 * documentation.
 */

RESULT_MUST_BE_USED
int git_config_get(const char *key);

/**
 * Finds the highest-priority value for the configuration variable `key`,
 * stores the pointer to it in `value` and returns 0. When the
 * configuration variable `key` is not found, returns 1 without touching
 * `value`. The caller should not free or modify `value`, as it is owned
 * by the cache.
 */
int git_config_get_value(const char *key, const char **value);

/**
 * Finds and returns the value list, sorted in order of increasing priority
 * for the configuration variable `key`. When the configuration variable
 * `key` is not found, returns 1 without touching `value`.
 *
 * The caller should not free or modify the returned pointer, as it is
 * owned by the cache.
 */
RESULT_MUST_BE_USED
int git_config_get_value_multi(const char *key,
			       const struct string_list **dest);
RESULT_MUST_BE_USED
int git_config_get_string_multi(const char *key,
				const struct string_list **dest);

/**
 * Resets and invalidates the config cache.
 */
void git_config_clear(void);

/**
 * Allocates and copies the retrieved string into the `dest` parameter for
 * the configuration variable `key`; if NULL string is given, prints an
 * error message and returns -1. When the configuration variable `key` is
 * not found, returns 1 without touching `dest`.
 */
int git_config_get_string(const char *key, char **dest);

/**
 * Similar to `git_config_get_string`, but does not allocate any new
 * memory; on success `dest` will point to memory owned by the config
 * machinery, which could be invalidated if it is discarded and reloaded.
 */
int git_config_get_string_tmp(const char *key, const char **dest);

/**
 * Finds and parses the value to an integer for the configuration variable
 * `key`. Dies on error; otherwise, stores the value of the parsed integer in
 * `dest` and returns 0. When the configuration variable `key` is not found,
 * returns 1 without touching `dest`.
 */
int git_config_get_int(const char *key, int *dest);

/**
 * Similar to `git_config_get_int` but for unsigned longs.
 */
int git_config_get_ulong(const char *key, unsigned long *dest);

/**
 * Finds and parses the value into a boolean value, for the configuration
 * variable `key` respecting keywords like "true" and "false". Integer
 * values are converted into true/false values (when they are non-zero or
 * zero, respectively). Other values cause a die(). If parsing is successful,
 * stores the value of the parsed result in `dest` and returns 0. When the
 * configuration variable `key` is not found, returns 1 without touching
 * `dest`.
 */
int git_config_get_bool(const char *key, int *dest);

/**
 * Similar to `git_config_get_bool`, except that integers are copied as-is,
 * and `is_bool` flag is unset.
 */
int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest);

/**
 * Similar to `git_config_get_bool`, except that it returns -1 on error
 * rather than dying.
 */
int git_config_get_maybe_bool(const char *key, int *dest);

/**
 * Similar to `git_config_get_string`, but expands `~` or `~user` into
 * the user's home directory when found at the beginning of the path.
 */
int git_config_get_pathname(const char *key, const char **dest);

int git_config_get_index_threads(int *dest);
int git_config_get_split_index(void);
int git_config_get_max_percent_split_change(void);

/* This dies if the configured or default date is in the future */
int git_config_get_expiry(const char *key, const char **output);

/* parse either "this many days" integer, or "5.days.ago" approxidate */
int git_config_get_expiry_in_days(const char *key, timestamp_t *, timestamp_t now);

/**
 * First prints the error message specified by the caller in `err` and then
 * dies printing the line number and the file name of the highest priority
 * value for the configuration variable `key`.
 */
NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3)));

/**
 * Helper function which formats the die error message according to the
 * parameters entered. Used by `git_die_config()`. It can be used by callers
 * handling `git_config_get_value_multi()` to print the correct error message
 * for the desired value.
 */
NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr);

#define LOOKUP_CONFIG(mapping, var) \
	lookup_config(mapping, ARRAY_SIZE(mapping), var)
int lookup_config(const char **mapping, int nr_mapping, const char *var);

#endif /* CONFIG_H */