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git/config.h
Brandon Williams 3b256228a6 config: read config from a repository object 
Teach the config machinery to read config information from a repository
object.  This involves storing a 'struct config_set' inside the
repository object and adding a number of functions (repo_config*) to be
able to query a repository's config.

The current config API enables lazy-loading of the config.  This means
that when 'git_config_get_int()' is called, if the_config_set hasn't
been populated yet, then it will be populated and properly initialized by
reading the necessary config files (system wide .gitconfig, user's home
.gitconfig, and the repository's config).  To maintain this paradigm,
the new API to read from a repository object's config will also perform
this lazy-initialization.

Since both APIs (git_config_get* and repo_config_get*) have the same
semantics we can migrate the default config to be stored within
'the_repository' and just have the 'git_config_get*' family of functions
redirect to the 'repo_config_get*' functions.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23 18:24:34 -07:00

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#ifndef CONFIG_H
#define CONFIG_H
/* 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)
struct git_config_source {
unsigned int use_stdin:1;
const char *file;
const char *blob;
};
enum config_origin_type {
CONFIG_ORIGIN_BLOB,
CONFIG_ORIGIN_FILE,
CONFIG_ORIGIN_STDIN,
CONFIG_ORIGIN_SUBMODULE_BLOB,
CONFIG_ORIGIN_CMDLINE
};
struct config_options {
unsigned int respect_includes : 1;
const char *commondir;
const char *git_dir;
};
typedef int (*config_fn_t)(const char *, const char *, void *);
extern int git_default_config(const char *, const char *, void *);
extern int git_config_from_file(config_fn_t fn, const char *, void *);
extern 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);
extern int git_config_from_blob_sha1(config_fn_t fn, const char *name,
const unsigned char *sha1, void *data);
extern void git_config_push_parameter(const char *text);
extern int git_config_from_parameters(config_fn_t fn, void *data);
extern void read_early_config(config_fn_t cb, void *data);
extern void git_config(config_fn_t fn, void *);
extern int config_with_options(config_fn_t fn, void *,
struct git_config_source *config_source,
const struct config_options *opts);
extern int git_parse_ulong(const char *, unsigned long *);
extern int git_parse_maybe_bool(const char *);
extern int git_config_int(const char *, const char *);
extern int64_t git_config_int64(const char *, const char *);
extern unsigned long git_config_ulong(const char *, const char *);
extern ssize_t git_config_ssize_t(const char *, const char *);
extern int git_config_bool_or_int(const char *, const char *, int *);
extern int git_config_bool(const char *, const char *);
extern int git_config_maybe_bool(const char *, const char *);
extern int git_config_string(const char **, const char *, const char *);
extern int git_config_pathname(const char **, const char *, const char *);
extern int git_config_set_in_file_gently(const char *, const char *, const char *);
extern void git_config_set_in_file(const char *, const char *, const char *);
extern int git_config_set_gently(const char *, const char *);
extern void git_config_set(const char *, const char *);
extern int git_config_parse_key(const char *, char **, int *);
extern int git_config_key_is_valid(const char *key);
extern int git_config_set_multivar_gently(const char *, const char *, const char *, int);
extern void git_config_set_multivar(const char *, const char *, const char *, int);
extern int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, int);
extern void git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
extern int git_config_rename_section(const char *, const char *);
extern int git_config_rename_section_in_file(const char *, const char *, const char *);
extern const char *git_etc_gitconfig(void);
extern int git_env_bool(const char *, int);
extern unsigned long git_env_ulong(const char *, unsigned long);
extern int git_config_system(void);
extern int config_error_nonbool(const char *);
#if defined(__GNUC__)
#define config_error_nonbool(s) (config_error_nonbool(s), const_error())
#endif
extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
enum config_scope {
CONFIG_SCOPE_UNKNOWN = 0,
CONFIG_SCOPE_SYSTEM,
CONFIG_SCOPE_GLOBAL,
CONFIG_SCOPE_REPO,
CONFIG_SCOPE_CMDLINE,
};
extern enum config_scope current_config_scope(void);
extern const char *current_config_origin_type(void);
extern const char *current_config_name(void);
struct config_include_data {
int depth;
config_fn_t fn;
void *data;
const struct config_options *opts;
};
#define CONFIG_INCLUDE_INIT { 0 }
extern int git_config_include(const char *name, const char *value, void *data);
/*
* 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.
*/
extern int parse_config_key(const char *var,
const char *section,
const char **subsection, int *subsection_len,
const char **key);
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;
};
extern void git_configset_init(struct config_set *cs);
extern int git_configset_add_file(struct config_set *cs, const char *filename);
extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value);
extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key);
extern void git_configset_clear(struct config_set *cs);
extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest);
extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest);
extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest);
extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest);
extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest);
extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest);
extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest);
extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest);
/* Functions for reading a repository's config */
struct repository;
extern void repo_config(struct repository *repo, config_fn_t fn, void *data);
extern int repo_config_get_value(struct repository *repo,
const char *key, const char **value);
extern const struct string_list *repo_config_get_value_multi(struct repository *repo,
const char *key);
extern int repo_config_get_string_const(struct repository *repo,
const char *key, const char **dest);
extern int repo_config_get_string(struct repository *repo,
const char *key, char **dest);
extern int repo_config_get_int(struct repository *repo,
const char *key, int *dest);
extern int repo_config_get_ulong(struct repository *repo,
const char *key, unsigned long *dest);
extern int repo_config_get_bool(struct repository *repo,
const char *key, int *dest);
extern int repo_config_get_bool_or_int(struct repository *repo,
const char *key, int *is_bool, int *dest);
extern int repo_config_get_maybe_bool(struct repository *repo,
const char *key, int *dest);
extern int repo_config_get_pathname(struct repository *repo,
const char *key, const char **dest);
extern int git_config_get_value(const char *key, const char **value);
extern const struct string_list *git_config_get_value_multi(const char *key);
extern void git_config_clear(void);
extern int git_config_get_string_const(const char *key, const char **dest);
extern int git_config_get_string(const char *key, char **dest);
extern int git_config_get_int(const char *key, int *dest);
extern int git_config_get_ulong(const char *key, unsigned long *dest);
extern int git_config_get_bool(const char *key, int *dest);
extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest);
extern int git_config_get_maybe_bool(const char *key, int *dest);
extern int git_config_get_pathname(const char *key, const char **dest);
extern int git_config_get_untracked_cache(void);
extern int git_config_get_split_index(void);
extern int git_config_get_max_percent_split_change(void);
/* This dies if the configured or default date is in the future */
extern int git_config_get_expiry(const char *key, const char **output);
struct key_value_info {
const char *filename;
int linenr;
enum config_origin_type origin_type;
enum config_scope scope;
};
extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3)));
extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr);
#endif /* CONFIG_H */
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