diff options
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 158 |
1 files changed, 136 insertions, 22 deletions
@@ -10,8 +10,8 @@ #include "trace.h" #include "string-list.h" #include "pack-revindex.h" +#include "hash.h" -#include SHA1_HEADER #ifndef platform_SHA_CTX /* * platform's underlying implementation of SHA-1; could be OpenSSL, @@ -66,8 +66,12 @@ unsigned long git_deflate_bound(git_zstream *, unsigned long); #define GIT_SHA1_RAWSZ 20 #define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) +/* The length in byte and in hex digits of the largest possible hash value. */ +#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ +#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ + struct object_id { - unsigned char hash[GIT_SHA1_RAWSZ]; + unsigned char hash[GIT_MAX_RAWSZ]; }; #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) @@ -343,6 +347,7 @@ struct index_state { extern struct index_state the_index; /* Name hashing */ +extern int test_lazy_init_name_hash(struct index_state *istate, int try_threaded); extern void add_name_hash(struct index_state *istate, struct cache_entry *ce); extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce); extern void free_name_hash(struct index_state *istate); @@ -410,6 +415,7 @@ static inline enum object_type object_type(unsigned int mode) #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE" #define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX" #define GIT_SUPER_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUPER_PREFIX" +#define GIT_TOPLEVEL_PREFIX_ENVIRONMENT "GIT_INTERNAL_TOPLEVEL_PREFIX" #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" #define INDEX_ENVIRONMENT "GIT_INDEX_FILE" @@ -518,11 +524,30 @@ extern void set_git_work_tree(const char *tree); #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" extern void setup_work_tree(void); +/* + * Find GIT_DIR of the repository that contains the current working directory, + * without changing the working directory or other global state. The result is + * appended to gitdir. The return value is either NULL if no repository was + * found, or pointing to the path inside gitdir's buffer. + */ +extern const char *discover_git_directory(struct strbuf *gitdir); extern const char *setup_git_directory_gently(int *); extern const char *setup_git_directory(void); extern char *prefix_path(const char *prefix, int len, const char *path); extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path); -extern const char *prefix_filename(const char *prefix, int len, const char *path); + +/* + * Concatenate "prefix" (if len is non-zero) and "path", with no + * connecting characters (so "prefix" should end with a "/"). + * Unlike prefix_path, this should be used if the named file does + * not have to interact with index entry; i.e. name of a random file + * on the filesystem. + * + * The return value is always a newly allocated string (even if the + * prefix was empty). + */ +extern char *prefix_filename(const char *prefix, const char *path); + extern int check_filename(const char *prefix, const char *name); extern void verify_filename(const char *prefix, const char *name, @@ -572,8 +597,10 @@ extern int read_index_unmerged(struct index_state *); #define CLOSE_LOCK (1 << 1) extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags); extern int discard_index(struct index_state *); +extern void move_index_extensions(struct index_state *dst, struct index_state *src); extern int unmerged_index(const struct index_state *); extern int verify_path(const char *path); +extern int strcmp_offset(const char *s1, const char *s2, size_t *first_change); extern int index_dir_exists(struct index_state *istate, const char *name, int namelen); extern void adjust_dirname_case(struct index_state *istate, char *name); extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase); @@ -685,6 +712,8 @@ extern void update_index_if_able(struct index_state *, struct lock_file *); extern int hold_locked_index(struct lock_file *, int); extern void set_alternate_index_output(const char *); +extern int verify_index_checksum; + /* Environment bits from configuration mechanism */ extern int trust_executable_bit; extern int trust_ctime; @@ -957,7 +986,7 @@ extern char *sha1_pack_index_name(const unsigned char *sha1); extern const char *find_unique_abbrev(const unsigned char *sha1, int len); extern int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len); -extern const unsigned char null_sha1[GIT_SHA1_RAWSZ]; +extern const unsigned char null_sha1[GIT_MAX_RAWSZ]; extern const struct object_id null_oid; static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) @@ -1069,8 +1098,9 @@ int adjust_shared_perm(const char *path); /* * Create the directory containing the named path, using care to be - * somewhat safe against races. Return one of the scld_error values - * to indicate success/failure. + * somewhat safe against races. Return one of the scld_error values to + * indicate success/failure. On error, set errno to describe the + * problem. * * SCLD_VANISHED indicates that one of the ancestor directories of the * path existed at one point during the function call and then @@ -1094,8 +1124,51 @@ enum scld_error { enum scld_error safe_create_leading_directories(char *path); enum scld_error safe_create_leading_directories_const(const char *path); +/* + * Callback function for raceproof_create_file(). This function is + * expected to do something that makes dirname(path) permanent despite + * the fact that other processes might be cleaning up empty + * directories at the same time. Usually it will create a file named + * path, but alternatively it could create another file in that + * directory, or even chdir() into that directory. The function should + * return 0 if the action was completed successfully. On error, it + * should return a nonzero result and set errno. + * raceproof_create_file() treats two errno values specially: + * + * - ENOENT -- dirname(path) does not exist. In this case, + * raceproof_create_file() tries creating dirname(path) + * (and any parent directories, if necessary) and calls + * the function again. + * + * - EISDIR -- the file already exists and is a directory. In this + * case, raceproof_create_file() removes the directory if + * it is empty (and recursively any empty directories that + * it contains) and calls the function again. + * + * Any other errno causes raceproof_create_file() to fail with the + * callback's return value and errno. + * + * Obviously, this function should be OK with being called again if it + * fails with ENOENT or EISDIR. In other scenarios it will not be + * called again. + */ +typedef int create_file_fn(const char *path, void *cb); + +/* + * Create a file in dirname(path) by calling fn, creating leading + * directories if necessary. Retry a few times in case we are racing + * with another process that is trying to clean up the directory that + * contains path. See the documentation for create_file_fn for more + * details. + * + * Return the value and set the errno that resulted from the most + * recent call of fn. fn is always called at least once, and will be + * called more than once if it returns ENOENT or EISDIR. + */ +int raceproof_create_file(const char *path, create_file_fn fn, void *cb); + int mkdir_in_gitdir(const char *path); -extern char *expand_user_path(const char *path); +extern char *expand_user_path(const char *path, int real_home); const char *enter_repo(const char *path, int strict); static inline int is_absolute_path(const char *path) { @@ -1125,6 +1198,13 @@ extern int is_ntfs_dotgit(const char *name); */ extern char *xdg_config_home(const char *filename); +/** + * Return a newly allocated string with the evaluation of + * "$XDG_CACHE_HOME/git/$filename" if $XDG_CACHE_HOME is non-empty, otherwise + * "$HOME/.cache/git/$filename". Return NULL upon error. + */ +extern char *xdg_cache_home(const char *filename); + /* object replacement */ #define LOOKUP_REPLACE_OBJECT 1 #define LOOKUP_UNKNOWN_OBJECT 2 @@ -1226,6 +1306,9 @@ extern int has_pack_index(const unsigned char *sha1); extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect); +/* Helper to check and "touch" a file */ +extern int check_and_freshen_file(const char *fn, int freshen); + extern const signed char hexval_table[256]; static inline unsigned int hexval(unsigned char c) { @@ -1285,7 +1368,7 @@ extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char extern int get_oid(const char *str, struct object_id *oid); -typedef int each_abbrev_fn(const unsigned char *sha1, void *); +typedef int each_abbrev_fn(const struct object_id *oid, void *); extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *); extern int set_disambiguate_hint_config(const char *var, const char *value); @@ -1317,6 +1400,15 @@ extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */ extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */ /* + * Parse a 40-character hexadecimal object ID starting from hex, updating the + * pointer specified by end when parsing stops. The resulting object ID is + * stored in oid. Returns 0 on success. Parsing will stop on the first NUL or + * other invalid character. end is only updated on success; otherwise, it is + * unmodified. + */ +extern int parse_oid_hex(const char *hex, struct object_id *oid, const char **end); + +/* * This reads short-hand syntax that not only evaluates to a commit * object name, but also can act as if the end user spelled the name * of the branch from the command line. @@ -1388,18 +1480,18 @@ struct date_mode { #define DATE_MODE(t) date_mode_from_type(DATE_##t) struct date_mode *date_mode_from_type(enum date_mode_type type); -const char *show_date(unsigned long time, int timezone, const struct date_mode *mode); -void show_date_relative(unsigned long time, int tz, const struct timeval *now, +const char *show_date(timestamp_t time, int timezone, const struct date_mode *mode); +void show_date_relative(timestamp_t time, int tz, const struct timeval *now, struct strbuf *timebuf); int parse_date(const char *date, struct strbuf *out); -int parse_date_basic(const char *date, unsigned long *timestamp, int *offset); -int parse_expiry_date(const char *date, unsigned long *timestamp); +int parse_date_basic(const char *date, timestamp_t *timestamp, int *offset); +int parse_expiry_date(const char *date, timestamp_t *timestamp); void datestamp(struct strbuf *out); #define approxidate(s) approxidate_careful((s), NULL) -unsigned long approxidate_careful(const char *, int *); -unsigned long approxidate_relative(const char *date, const struct timeval *now); +timestamp_t approxidate_careful(const char *, int *); +timestamp_t approxidate_relative(const char *date, const struct timeval *now); void parse_date_format(const char *format, struct date_mode *mode); -int date_overflows(unsigned long date); +int date_overflows(timestamp_t date); #define IDENT_STRICT 1 #define IDENT_NO_DATE 2 @@ -1591,9 +1683,12 @@ extern struct packed_git *find_sha1_pack(const unsigned char *sha1, extern void pack_report(void); /* - * Create a temporary file rooted in the object database directory. + * Create a temporary file rooted in the object database directory, or + * die on failure. The filename is taken from "pattern", which should have the + * usual "XXXXXX" trailer, and the resulting filename is written into the + * "template" buffer. Returns the open descriptor. */ -extern int odb_mkstemp(char *template, size_t limit, const char *pattern); +extern int odb_mkstemp(struct strbuf *template, const char *pattern); /* * Generate the filename to be used for a pack file with checksum "sha1" and @@ -1647,6 +1742,12 @@ extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr); * error. */ extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n); +/* + * Like nth_packed_object_sha1, but write the data into the object specified by + * the the first argument. Returns the first argument on success, and NULL on + * error. + */ +extern const struct object_id *nth_packed_object_oid(struct object_id *, struct packed_git *, uint32_t n); /* * Return the offset of the nth object within the specified packfile. @@ -1688,7 +1789,7 @@ extern int unpack_object_header(struct packed_git *, struct pack_window **, off_ * scratch buffer, but restored to its original contents before * the function returns. */ -typedef int each_loose_object_fn(const unsigned char *sha1, +typedef int each_loose_object_fn(const struct object_id *oid, const char *path, void *data); typedef int each_loose_cruft_fn(const char *basename, @@ -1714,7 +1815,7 @@ int for_each_loose_file_in_objdir_buf(struct strbuf *path, * LOCAL_ONLY flag is set). */ #define FOR_EACH_OBJECT_LOCAL_ONLY 0x1 -typedef int each_packed_object_fn(const unsigned char *sha1, +typedef int each_packed_object_fn(const struct object_id *oid, struct packed_git *pack, uint32_t pos, void *data); @@ -1792,6 +1893,11 @@ enum config_origin_type { CONFIG_ORIGIN_CMDLINE }; +struct config_options { + unsigned int respect_includes : 1; + 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 *); @@ -1801,15 +1907,17 @@ 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 git_config_with_options(config_fn_t fn, void *, struct git_config_source *config_source, - int respect_includes); + 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 *); @@ -1856,6 +1964,7 @@ 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); @@ -1933,6 +2042,11 @@ 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); /* * This is a hack for test programs like test-dump-untracked-cache to @@ -2085,8 +2199,8 @@ struct commit_list; int try_merge_command(const char *strategy, size_t xopts_nr, const char **xopts, struct commit_list *common, const char *head_arg, struct commit_list *remotes); -int checkout_fast_forward(const unsigned char *from, - const unsigned char *to, +int checkout_fast_forward(const struct object_id *from, + const struct object_id *to, int overwrite_ignore); |