diff options
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 119 |
1 files changed, 108 insertions, 11 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, @@ -1052,9 +1052,6 @@ static inline int is_empty_tree_oid(const struct object_id *oid) return !hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN); } - -int git_mkstemp(char *path, size_t n, const char *template); - /* set default permissions by passing mode arguments to open(2) */ int git_mkstemps_mode(char *pattern, int suffix_len, int mode); int git_mkstemp_mode(char *pattern, int mode); @@ -1079,8 +1076,9 @@ 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 @@ -1104,6 +1102,49 @@ 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); const char *enter_repo(const char *path, int strict); @@ -1116,7 +1157,7 @@ char *strbuf_realpath(struct strbuf *resolved, const char *path, int die_on_error); const char *real_path(const char *path); const char *real_path_if_valid(const char *path); -char *real_pathdup(const char *path); +char *real_pathdup(const char *path, int die_on_error); const char *absolute_path(const char *path); char *absolute_pathdup(const char *path); const char *remove_leading_path(const char *in, const char *prefix); @@ -1236,6 +1277,9 @@ 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) { @@ -1326,7 +1370,46 @@ extern char *oid_to_hex_r(char *out, const struct object_id *oid); 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 */ -extern int interpret_branch_name(const char *str, int len, struct strbuf *); +/* + * 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. + * + * - "@{-N}" finds the name of the Nth previous branch we were on, and + * places the name of the branch in the given buf and returns the + * number of characters parsed if successful. + * + * - "<branch>@{upstream}" finds the name of the other ref that + * <branch> is configured to merge with (missing <branch> defaults + * to the current branch), and places the name of the branch in the + * given buf and returns the number of characters parsed if + * successful. + * + * If the input is not of the accepted format, it returns a negative + * number to signal an error. + * + * If the input was ok but there are not N branch switches in the + * reflog, it returns 0. + * + * If "allowed" is non-zero, it is a treated as a bitfield of allowable + * expansions: local branches ("refs/heads/"), remote branches + * ("refs/remotes/"), or "HEAD". If no "allowed" bits are set, any expansion is + * allowed, even ones to refs outside of those namespaces. + */ +#define INTERPRET_BRANCH_LOCAL (1<<0) +#define INTERPRET_BRANCH_REMOTE (1<<1) +#define INTERPRET_BRANCH_HEAD (1<<2) +extern int interpret_branch_name(const char *str, int len, struct strbuf *, + unsigned allowed); extern int get_oid_mb(const char *str, struct object_id *oid); extern int validate_headref(const char *ref); @@ -1606,6 +1689,12 @@ 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. @@ -1647,7 +1736,7 @@ 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, @@ -1673,7 +1762,7 @@ 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); @@ -1827,8 +1916,11 @@ extern int git_config_include(const char *name, const char *value, void *data); * * (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 + * 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, @@ -1890,6 +1982,11 @@ 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 |