#ifndef CACHE_H #define CACHE_H #include "git-compat-util.h" #include "strbuf.h" #include "hashmap.h" #include "list.h" #include "advice.h" #include "gettext.h" #include "convert.h" #include "trace.h" #include "string-list.h" #include "pack-revindex.h" #include "hash.h" #include "path.h" #include "sha1-array.h" #include "repository.h" #include "mem-pool.h" #include typedef struct git_zstream { z_stream z; unsigned long avail_in; unsigned long avail_out; unsigned long total_in; unsigned long total_out; unsigned char *next_in; unsigned char *next_out; } git_zstream; void git_inflate_init(git_zstream *); void git_inflate_init_gzip_only(git_zstream *); void git_inflate_end(git_zstream *); int git_inflate(git_zstream *, int flush); void git_deflate_init(git_zstream *, int level); void git_deflate_init_gzip(git_zstream *, int level); void git_deflate_init_raw(git_zstream *, int level); void git_deflate_end(git_zstream *); int git_deflate_abort(git_zstream *); int git_deflate_end_gently(git_zstream *); int git_deflate(git_zstream *, int flush); unsigned long git_deflate_bound(git_zstream *, unsigned long); /* The length in bytes and in hex digits of an object name (SHA-1 value). */ #define GIT_SHA1_RAWSZ 20 #define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) /* The block size of SHA-1. */ #define GIT_SHA1_BLKSZ 64 /* The length in bytes and in hex digits of an object name (SHA-256 value). */ #define GIT_SHA256_RAWSZ 32 #define GIT_SHA256_HEXSZ (2 * GIT_SHA256_RAWSZ) /* The block size of SHA-256. */ #define GIT_SHA256_BLKSZ 64 /* The length in byte and in hex digits of the largest possible hash value. */ #define GIT_MAX_RAWSZ GIT_SHA256_RAWSZ #define GIT_MAX_HEXSZ GIT_SHA256_HEXSZ /* The largest possible block size for any supported hash. */ #define GIT_MAX_BLKSZ GIT_SHA256_BLKSZ struct object_id { unsigned char hash[GIT_MAX_RAWSZ]; }; #define the_hash_algo the_repository->hash_algo #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) #define DTYPE(de) ((de)->d_type) #else #undef DT_UNKNOWN #undef DT_DIR #undef DT_REG #undef DT_LNK #define DT_UNKNOWN 0 #define DT_DIR 1 #define DT_REG 2 #define DT_LNK 3 #define DTYPE(de) DT_UNKNOWN #endif /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */ #define S_IFINVALID 0030000 /* * A "directory link" is a link to another git directory. * * The value 0160000 is not normally a valid mode, and * also just happens to be S_IFDIR + S_IFLNK */ #define S_IFGITLINK 0160000 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) /* * Some mode bits are also used internally for computations. * * They *must* not overlap with any valid modes, and they *must* not be emitted * to outside world - i.e. appear on disk or network. In other words, it's just * temporary fields, which we internally use, but they have to stay in-house. * * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git * codebase mode is `unsigned int` which is assumed to be at least 32 bits ) */ /* used internally in tree-diff */ #define S_DIFFTREE_IFXMIN_NEQ 0x80000000 /* * Intensive research over the course of many years has shown that * port 9418 is totally unused by anything else. Or * * Your search - "port 9418" - did not match any documents. * * as www.google.com puts it. * * This port has been properly assigned for git use by IANA: * git (Assigned-9418) [I06-050728-0001]. * * git 9418/tcp git pack transfer service * git 9418/udp git pack transfer service * * with Linus Torvalds as the point of * contact. September 2005. * * See http://www.iana.org/assignments/port-numbers */ #define DEFAULT_GIT_PORT 9418 /* * Basic data structures for the directory cache */ #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */ struct cache_header { uint32_t hdr_signature; uint32_t hdr_version; uint32_t hdr_entries; }; #define INDEX_FORMAT_LB 2 #define INDEX_FORMAT_UB 4 /* * The "cache_time" is just the low 32 bits of the * time. It doesn't matter if it overflows - we only * check it for equality in the 32 bits we save. */ struct cache_time { uint32_t sec; uint32_t nsec; }; struct stat_data { struct cache_time sd_ctime; struct cache_time sd_mtime; unsigned int sd_dev; unsigned int sd_ino; unsigned int sd_uid; unsigned int sd_gid; unsigned int sd_size; }; struct cache_entry { struct hashmap_entry ent; struct stat_data ce_stat_data; unsigned int ce_mode; unsigned int ce_flags; unsigned int mem_pool_allocated; unsigned int ce_namelen; unsigned int index; /* for link extension */ struct object_id oid; char name[FLEX_ARRAY]; /* more */ }; #define CE_STAGEMASK (0x3000) #define CE_EXTENDED (0x4000) #define CE_VALID (0x8000) #define CE_STAGESHIFT 12 /* * Range 0xFFFF0FFF in ce_flags is divided into * two parts: in-memory flags and on-disk ones. * Flags in CE_EXTENDED_FLAGS will get saved on-disk * if you want to save a new flag, add it in * CE_EXTENDED_FLAGS * * In-memory only flags */ #define CE_UPDATE (1 << 16) #define CE_REMOVE (1 << 17) #define CE_UPTODATE (1 << 18) #define CE_ADDED (1 << 19) #define CE_HASHED (1 << 20) #define CE_FSMONITOR_VALID (1 << 21) #define CE_WT_REMOVE (1 << 22) /* remove in work directory */ #define CE_CONFLICTED (1 << 23) #define CE_UNPACKED (1 << 24) #define CE_NEW_SKIP_WORKTREE (1 << 25) /* used to temporarily mark paths matched by pathspecs */ #define CE_MATCHED (1 << 26) #define CE_UPDATE_IN_BASE (1 << 27) #define CE_STRIP_NAME (1 << 28) /* * Extended on-disk flags */ #define CE_INTENT_TO_ADD (1 << 29) #define CE_SKIP_WORKTREE (1 << 30) /* CE_EXTENDED2 is for future extension */ #define CE_EXTENDED2 (1U << 31) #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) /* * Safeguard to avoid saving wrong flags: * - CE_EXTENDED2 won't get saved until its semantic is known * - Bits in 0x0000FFFF have been saved in ce_flags already * - Bits in 0x003F0000 are currently in-memory flags */ #if CE_EXTENDED_FLAGS & 0x803FFFFF #error "CE_EXTENDED_FLAGS out of range" #endif /* Forward structure decls */ struct pathspec; struct child_process; struct tree; /* * Copy the sha1 and stat state of a cache entry from one to * another. But we never change the name, or the hash state! */ static inline void copy_cache_entry(struct cache_entry *dst, const struct cache_entry *src) { unsigned int state = dst->ce_flags & CE_HASHED; int mem_pool_allocated = dst->mem_pool_allocated; /* Don't copy hash chain and name */ memcpy(&dst->ce_stat_data, &src->ce_stat_data, offsetof(struct cache_entry, name) - offsetof(struct cache_entry, ce_stat_data)); /* Restore the hash state */ dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; /* Restore the mem_pool_allocated flag */ dst->mem_pool_allocated = mem_pool_allocated; } static inline unsigned create_ce_flags(unsigned stage) { return (stage << CE_STAGESHIFT); } #define ce_namelen(ce) ((ce)->ce_namelen) #define ce_size(ce) cache_entry_size(ce_namelen(ce)) #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE) #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE) #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE) #define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD) #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) static inline unsigned int create_ce_mode(unsigned int mode) { if (S_ISLNK(mode)) return S_IFLNK; if (S_ISDIR(mode) || S_ISGITLINK(mode)) return S_IFGITLINK; return S_IFREG | ce_permissions(mode); } static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce, unsigned int mode) { extern int trust_executable_bit, has_symlinks; if (!has_symlinks && S_ISREG(mode) && ce && S_ISLNK(ce->ce_mode)) return ce->ce_mode; if (!trust_executable_bit && S_ISREG(mode)) { if (ce && S_ISREG(ce->ce_mode)) return ce->ce_mode; return create_ce_mode(0666); } return create_ce_mode(mode); } static inline int ce_to_dtype(const struct cache_entry *ce) { unsigned ce_mode = ntohl(ce->ce_mode); if (S_ISREG(ce_mode)) return DT_REG; else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode)) return DT_DIR; else if (S_ISLNK(ce_mode)) return DT_LNK; else return DT_UNKNOWN; } static inline unsigned int canon_mode(unsigned int mode) { if (S_ISREG(mode)) return S_IFREG | ce_permissions(mode); if (S_ISLNK(mode)) return S_IFLNK; if (S_ISDIR(mode)) return S_IFDIR; return S_IFGITLINK; } #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) #define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */ #define CE_ENTRY_CHANGED (1 << 1) #define CE_ENTRY_REMOVED (1 << 2) #define CE_ENTRY_ADDED (1 << 3) #define RESOLVE_UNDO_CHANGED (1 << 4) #define CACHE_TREE_CHANGED (1 << 5) #define SPLIT_INDEX_ORDERED (1 << 6) #define UNTRACKED_CHANGED (1 << 7) #define FSMONITOR_CHANGED (1 << 8) struct split_index; struct untracked_cache; struct index_state { struct cache_entry **cache; unsigned int version; unsigned int cache_nr, cache_alloc, cache_changed; struct string_list *resolve_undo; struct cache_tree *cache_tree; struct split_index *split_index; struct cache_time timestamp; unsigned name_hash_initialized : 1, initialized : 1, drop_cache_tree : 1, fsmonitor_has_run_once : 1; struct hashmap name_hash; struct hashmap dir_hash; struct object_id oid; struct untracked_cache *untracked; uint64_t fsmonitor_last_update; struct ewah_bitmap *fsmonitor_dirty; struct mem_pool *ce_mem_pool; }; /* 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); /* Cache entry creation and cleanup */ /* * Create cache_entry intended for use in the specified index. Caller * is responsible for discarding the cache_entry with * `discard_cache_entry`. */ struct cache_entry *make_cache_entry(struct index_state *istate, unsigned int mode, const struct object_id *oid, const char *path, int stage, unsigned int refresh_options); struct cache_entry *make_empty_cache_entry(struct index_state *istate, size_t name_len); /* * Create a cache_entry that is not intended to be added to an index. * Caller is responsible for discarding the cache_entry * with `discard_cache_entry`. */ struct cache_entry *make_transient_cache_entry(unsigned int mode, const struct object_id *oid, const char *path, int stage); struct cache_entry *make_empty_transient_cache_entry(size_t name_len); /* * Discard cache entry. */ void discard_cache_entry(struct cache_entry *ce); /* * Check configuration if we should perform extra validation on cache * entries. */ int should_validate_cache_entries(void); /* * Duplicate a cache_entry. Allocate memory for the new entry from a * memory_pool. Takes into account cache_entry fields that are meant * for managing the underlying memory allocation of the cache_entry. */ struct cache_entry *dup_cache_entry(const struct cache_entry *ce, struct index_state *istate); /* * Validate the cache entries in the index. This is an internal * consistency check that the cache_entry structs are allocated from * the expected memory pool. */ void validate_cache_entries(const struct index_state *istate); #ifdef USE_THE_INDEX_COMPATIBILITY_MACROS extern struct index_state the_index; #define active_cache (the_index.cache) #define active_nr (the_index.cache_nr) #define active_alloc (the_index.cache_alloc) #define active_cache_changed (the_index.cache_changed) #define active_cache_tree (the_index.cache_tree) #define read_cache() repo_read_index(the_repository) #define read_cache_from(path) read_index_from(&the_index, (path), (get_git_dir())) #define read_cache_preload(pathspec) repo_read_index_preload(the_repository, (pathspec), 0) #define is_cache_unborn() is_index_unborn(&the_index) #define read_cache_unmerged() repo_read_index_unmerged(the_repository) #define discard_cache() discard_index(&the_index) #define unmerged_cache() unmerged_index(&the_index) #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags)) #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) #define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip)) #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) #define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) #define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) #define resolve_undo_clear() resolve_undo_clear_index(&the_index) #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) #define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) #define hold_locked_index(lock_file, flags) repo_hold_locked_index(the_repository, (lock_file), (flags)) #endif #define TYPE_BITS 3 /* * Values in this enum (except those outside the 3 bit range) are part * of pack file format. See Documentation/technical/pack-format.txt * for more information. */ enum object_type { OBJ_BAD = -1, OBJ_NONE = 0, OBJ_COMMIT = 1, OBJ_TREE = 2, OBJ_BLOB = 3, OBJ_TAG = 4, /* 5 for future expansion */ OBJ_OFS_DELTA = 6, OBJ_REF_DELTA = 7, OBJ_ANY, OBJ_MAX }; static inline enum object_type object_type(unsigned int mode) { return S_ISDIR(mode) ? OBJ_TREE : S_ISGITLINK(mode) ? OBJ_COMMIT : OBJ_BLOB; } /* Double-check local_repo_env below if you add to this list. */ #define GIT_DIR_ENVIRONMENT "GIT_DIR" #define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR" #define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE" #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE" #define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX" #define GIT_SUPER_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUPER_PREFIX" #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" #define INDEX_ENVIRONMENT "GIT_INDEX_FILE" #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE" #define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE" #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR" #define CONFIG_ENVIRONMENT "GIT_CONFIG" #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS" #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH" #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES" #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS" #define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE" #define GITATTRIBUTES_FILE ".gitattributes" #define INFOATTRIBUTES_FILE "info/attributes" #define ATTRIBUTE_MACRO_PREFIX "[attr]" #define GITMODULES_FILE ".gitmodules" #define GITMODULES_INDEX ":.gitmodules" #define GITMODULES_HEAD "HEAD:.gitmodules" #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF" #define GIT_NOTES_DEFAULT_REF "refs/notes/commits" #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF" #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF" #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE" #define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS" #define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS" #define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS" #define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS" #define GIT_QUARANTINE_ENVIRONMENT "GIT_QUARANTINE_PATH" #define GIT_OPTIONAL_LOCKS_ENVIRONMENT "GIT_OPTIONAL_LOCKS" #define GIT_TEXT_DOMAIN_DIR_ENVIRONMENT "GIT_TEXTDOMAINDIR" /* * Environment variable used in handshaking the wire protocol. * Contains a colon ':' separated list of keys with optional values * 'key[=value]'. Presence of unknown keys and values must be * ignored. */ #define GIT_PROTOCOL_ENVIRONMENT "GIT_PROTOCOL" /* HTTP header used to handshake the wire protocol */ #define GIT_PROTOCOL_HEADER "Git-Protocol" /* * This environment variable is expected to contain a boolean indicating * whether we should or should not treat: * * GIT_DIR=foo.git git ... * * as if GIT_WORK_TREE=. was given. It's not expected that users will make use * of this, but we use it internally to communicate to sub-processes that we * are in a bare repo. If not set, defaults to true. */ #define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE" /* * Repository-local GIT_* environment variables; these will be cleared * when git spawns a sub-process that runs inside another repository. * The array is NULL-terminated, which makes it easy to pass in the "env" * parameter of a run-command invocation, or to do a simple walk. */ extern const char * const local_repo_env[]; extern void setup_git_env(const char *git_dir); /* * Returns true iff we have a configured git repository (either via * setup_git_directory, or in the environment via $GIT_DIR). */ int have_git_dir(void); extern int is_bare_repository_cfg; extern int is_bare_repository(void); extern int is_inside_git_dir(void); extern char *git_work_tree_cfg; extern int is_inside_work_tree(void); extern const char *get_git_dir(void); extern const char *get_git_common_dir(void); extern char *get_object_directory(void); extern char *get_index_file(void); extern char *get_graft_file(struct repository *r); extern void set_git_dir(const char *path); extern int get_common_dir_noenv(struct strbuf *sb, const char *gitdir); extern int get_common_dir(struct strbuf *sb, const char *gitdir); extern const char *get_git_namespace(void); extern const char *strip_namespace(const char *namespaced_ref); extern const char *get_super_prefix(void); extern const char *get_git_work_tree(void); /* * Return true if the given path is a git directory; note that this _just_ * looks at the directory itself. If you want to know whether "foo/.git" * is a repository, you must feed that path, not just "foo". */ extern int is_git_directory(const char *path); /* * Return 1 if the given path is the root of a git repository or * submodule, else 0. Will not return 1 for bare repositories with the * exception of creating a bare repository in "foo/.git" and calling * is_git_repository("foo"). * * If we run into read errors, we err on the side of saying "yes, it is", * as we usually consider sub-repos precious, and would prefer to err on the * side of not disrupting or deleting them. */ extern int is_nonbare_repository_dir(struct strbuf *path); #define READ_GITFILE_ERR_STAT_FAILED 1 #define READ_GITFILE_ERR_NOT_A_FILE 2 #define READ_GITFILE_ERR_OPEN_FAILED 3 #define READ_GITFILE_ERR_READ_FAILED 4 #define READ_GITFILE_ERR_INVALID_FORMAT 5 #define READ_GITFILE_ERR_NO_PATH 6 #define READ_GITFILE_ERR_NOT_A_REPO 7 #define READ_GITFILE_ERR_TOO_LARGE 8 extern void read_gitfile_error_die(int error_code, const char *path, const char *dir); extern const char *read_gitfile_gently(const char *path, int *return_error_code); #define read_gitfile(path) read_gitfile_gently((path), NULL) extern const char *resolve_gitdir_gently(const char *suspect, int *return_error_code); #define resolve_gitdir(path) resolve_gitdir_gently((path), NULL) extern void set_git_work_tree(const char *tree); #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" extern void setup_work_tree(void); /* * Find the commondir and gitdir of the repository that contains the current * working directory, without changing the working directory or other global * state. The result is appended to commondir and gitdir. If the discovered * gitdir does not correspond to a worktree, then 'commondir' and 'gitdir' will * both have the same result appended to the buffer. The return value is * either 0 upon success and non-zero if no repository was found. */ extern int discover_git_directory(struct strbuf *commondir, 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); /* * 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, int diagnose_misspelt_rev); extern void verify_non_filename(const char *prefix, const char *name); extern int path_inside_repo(const char *prefix, const char *path); #define INIT_DB_QUIET 0x0001 #define INIT_DB_EXIST_OK 0x0002 extern int init_db(const char *git_dir, const char *real_git_dir, const char *template_dir, unsigned int flags); extern void sanitize_stdfds(void); extern int daemonize(void); #define alloc_nr(x) (((x)+16)*3/2) /* * Realloc the buffer pointed at by variable 'x' so that it can hold * at least 'nr' entries; the number of entries currently allocated * is 'alloc', using the standard growing factor alloc_nr() macro. * * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. */ #define ALLOC_GROW(x, nr, alloc) \ do { \ if ((nr) > alloc) { \ if (alloc_nr(alloc) < (nr)) \ alloc = (nr); \ else \ alloc = alloc_nr(alloc); \ REALLOC_ARRAY(x, alloc); \ } \ } while (0) /* Initialize and use the cache information */ struct lock_file; extern void preload_index(struct index_state *index, const struct pathspec *pathspec, unsigned int refresh_flags); extern int do_read_index(struct index_state *istate, const char *path, int must_exist); /* for testting only! */ extern int read_index_from(struct index_state *, const char *path, const char *gitdir); extern int is_index_unborn(struct index_state *); /* For use with `write_locked_index()`. */ #define COMMIT_LOCK (1 << 0) #define SKIP_IF_UNCHANGED (1 << 1) /* * Write the index while holding an already-taken lock. Close the lock, * and if `COMMIT_LOCK` is given, commit it. * * Unless a split index is in use, write the index into the lockfile. * * With a split index, write the shared index to a temporary file, * adjust its permissions and rename it into place, then write the * split index to the lockfile. If the temporary file for the shared * index cannot be created, fall back to the behavior described in * the previous paragraph. * * With `COMMIT_LOCK`, the lock is always committed or rolled back. * Without it, the lock is closed, but neither committed nor rolled * back. * * If `SKIP_IF_UNCHANGED` is given and the index is unchanged, nothing * is written (and the lock is rolled back if `COMMIT_LOCK` is given). */ 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 *); /** * Returns 1 if istate differs from tree, 0 otherwise. If tree is NULL, * compares istate to HEAD. If tree is NULL and on an unborn branch, * returns 1 if there are entries in istate, 0 otherwise. If an strbuf is * provided, the space-separated list of files that differ will be appended * to it. */ extern int repo_index_has_changes(struct repository *repo, struct tree *tree, struct strbuf *sb); extern int verify_path(const char *path, unsigned mode); 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); /* * Searches for an entry defined by name and namelen in the given index. * If the return value is positive (including 0) it is the position of an * exact match. If the return value is negative, the negated value minus 1 * is the position where the entry would be inserted. * Example: The current index consists of these files and its stages: * * b#0, d#0, f#1, f#3 * * index_name_pos(&index, "a", 1) -> -1 * index_name_pos(&index, "b", 1) -> 0 * index_name_pos(&index, "c", 1) -> -2 * index_name_pos(&index, "d", 1) -> 1 * index_name_pos(&index, "e", 1) -> -3 * index_name_pos(&index, "f", 1) -> -3 * index_name_pos(&index, "g", 1) -> -5 */ extern int index_name_pos(const struct index_state *, const char *name, int namelen); #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */ #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */ #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */ #define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */ #define ADD_CACHE_RENORMALIZE 64 /* Pass along HASH_RENORMALIZE */ extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option); extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name); /* Remove entry, return true if there are more entries to go. */ extern int remove_index_entry_at(struct index_state *, int pos); extern void remove_marked_cache_entries(struct index_state *istate); extern int remove_file_from_index(struct index_state *, const char *path); #define ADD_CACHE_VERBOSE 1 #define ADD_CACHE_PRETEND 2 #define ADD_CACHE_IGNORE_ERRORS 4 #define ADD_CACHE_IGNORE_REMOVAL 8 #define ADD_CACHE_INTENT 16 /* * These two are used to add the contents of the file at path * to the index, marking the working tree up-to-date by storing * the cached stat info in the resulting cache entry. A caller * that has already run lstat(2) on the path can call * add_to_index(), and all others can call add_file_to_index(); * the latter will do necessary lstat(2) internally before * calling the former. */ extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags); extern int add_file_to_index(struct index_state *, const char *path, int flags); extern int chmod_index_entry(struct index_state *, struct cache_entry *ce, char flip); extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b); extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce); extern int index_name_is_other(const struct index_state *, const char *, int); extern void *read_blob_data_from_index(const struct index_state *, const char *, unsigned long *); /* do stat comparison even if CE_VALID is true */ #define CE_MATCH_IGNORE_VALID 01 /* do not check the contents but report dirty on racily-clean entries */ #define CE_MATCH_RACY_IS_DIRTY 02 /* do stat comparison even if CE_SKIP_WORKTREE is true */ #define CE_MATCH_IGNORE_SKIP_WORKTREE 04 /* ignore non-existent files during stat update */ #define CE_MATCH_IGNORE_MISSING 0x08 /* enable stat refresh */ #define CE_MATCH_REFRESH 0x10 /* don't refresh_fsmonitor state or do stat comparison even if CE_FSMONITOR_VALID is true */ #define CE_MATCH_IGNORE_FSMONITOR 0X20 extern int is_racy_timestamp(const struct index_state *istate, const struct cache_entry *ce); extern int ie_match_stat(struct index_state *, const struct cache_entry *, struct stat *, unsigned int); extern int ie_modified(struct index_state *, const struct cache_entry *, struct stat *, unsigned int); #define HASH_WRITE_OBJECT 1 #define HASH_FORMAT_CHECK 2 #define HASH_RENORMALIZE 4 extern int index_fd(struct index_state *istate, struct object_id *oid, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags); extern int index_path(struct index_state *istate, struct object_id *oid, const char *path, struct stat *st, unsigned flags); /* * Record to sd the data from st that we use to check whether a file * might have changed. */ extern void fill_stat_data(struct stat_data *sd, struct stat *st); /* * Return 0 if st is consistent with a file not having been changed * since sd was filled. If there are differences, return a * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, * INODE_CHANGED, and DATA_CHANGED. */ extern int match_stat_data(const struct stat_data *sd, struct stat *st); extern int match_stat_data_racy(const struct index_state *istate, const struct stat_data *sd, struct stat *st); extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); #define REFRESH_REALLY 0x0001 /* ignore_valid */ #define REFRESH_UNMERGED 0x0002 /* allow unmerged */ #define REFRESH_QUIET 0x0004 /* be quiet about it */ #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */ #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */ #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */ #define REFRESH_PROGRESS 0x0040 /* show progress bar if stderr is tty */ extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg); extern struct cache_entry *refresh_cache_entry(struct index_state *, struct cache_entry *, unsigned int); extern void set_alternate_index_output(const char *); extern int verify_index_checksum; extern int verify_ce_order; /* Environment bits from configuration mechanism */ extern int trust_executable_bit; extern int trust_ctime; extern int check_stat; extern int quote_path_fully; extern int has_symlinks; extern int minimum_abbrev, default_abbrev; extern int ignore_case; extern int assume_unchanged; extern int prefer_symlink_refs; extern int warn_ambiguous_refs; extern int warn_on_object_refname_ambiguity; extern const char *apply_default_whitespace; extern const char *apply_default_ignorewhitespace; extern const char *git_attributes_file; extern const char *git_hooks_path; extern int zlib_compression_level; extern int core_compression_level; extern int pack_compression_level; extern size_t packed_git_window_size; extern size_t packed_git_limit; extern size_t delta_base_cache_limit; extern unsigned long big_file_threshold; extern unsigned long pack_size_limit_cfg; /* * Accessors for the core.sharedrepository config which lazy-load the value * from the config (if not already set). The "reset" function can be * used to unset "set" or cached value, meaning that the value will be loaded * fresh from the config file on the next call to get_shared_repository(). */ void set_shared_repository(int value); int get_shared_repository(void); void reset_shared_repository(void); /* * Do replace refs need to be checked this run? This variable is * initialized to true unless --no-replace-object is used or * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some * commands that do not want replace references to be active. */ extern int read_replace_refs; extern char *git_replace_ref_base; extern int fsync_object_files; extern int core_preload_index; extern int core_apply_sparse_checkout; extern int precomposed_unicode; extern int protect_hfs; extern int protect_ntfs; extern const char *core_fsmonitor; /* * Include broken refs in all ref iterations, which will * generally choke dangerous operations rather than letting * them silently proceed without taking the broken ref into * account. */ extern int ref_paranoia; /* * Returns the boolean value of $GIT_OPTIONAL_LOCKS (or the default value). */ int use_optional_locks(void); /* * The character that begins a commented line in user-editable file * that is subject to stripspace. */ extern char comment_line_char; extern int auto_comment_line_char; enum log_refs_config { LOG_REFS_UNSET = -1, LOG_REFS_NONE = 0, LOG_REFS_NORMAL, LOG_REFS_ALWAYS }; extern enum log_refs_config log_all_ref_updates; enum rebase_setup_type { AUTOREBASE_NEVER = 0, AUTOREBASE_LOCAL, AUTOREBASE_REMOTE, AUTOREBASE_ALWAYS }; enum push_default_type { PUSH_DEFAULT_NOTHING = 0, PUSH_DEFAULT_MATCHING, PUSH_DEFAULT_SIMPLE, PUSH_DEFAULT_UPSTREAM, PUSH_DEFAULT_CURRENT, PUSH_DEFAULT_UNSPECIFIED }; extern enum rebase_setup_type autorebase; extern enum push_default_type push_default; enum object_creation_mode { OBJECT_CREATION_USES_HARDLINKS = 0, OBJECT_CREATION_USES_RENAMES = 1 }; extern enum object_creation_mode object_creation_mode; extern char *notes_ref_name; extern int grafts_replace_parents; /* * GIT_REPO_VERSION is the version we write by default. The * _READ variant is the highest number we know how to * handle. */ #define GIT_REPO_VERSION 0 #define GIT_REPO_VERSION_READ 1 extern int repository_format_precious_objects; extern char *repository_format_partial_clone; extern const char *core_partial_clone_filter_default; extern int repository_format_worktree_config; struct repository_format { int version; int precious_objects; char *partial_clone; /* value of extensions.partialclone */ int worktree_config; int is_bare; int hash_algo; char *work_tree; struct string_list unknown_extensions; }; /* * Read the repository format characteristics from the config file "path" into * "format" struct. Returns the numeric version. On error, -1 is returned, * format->version is set to -1, and all other fields in the struct are * undefined. */ int read_repository_format(struct repository_format *format, const char *path); /* * Verify that the repository described by repository_format is something we * can read. If it is, return 0. Otherwise, return -1, and "err" will describe * any errors encountered. */ int verify_repository_format(const struct repository_format *format, struct strbuf *err); /* * Check the repository format version in the path found in get_git_dir(), * and die if it is a version we don't understand. Generally one would * set_git_dir() before calling this, and use it only for "are we in a valid * repo?". */ extern void check_repository_format(void); #define MTIME_CHANGED 0x0001 #define CTIME_CHANGED 0x0002 #define OWNER_CHANGED 0x0004 #define MODE_CHANGED 0x0008 #define INODE_CHANGED 0x0010 #define DATA_CHANGED 0x0020 #define TYPE_CHANGED 0x0040 /* * Return an abbreviated sha1 unique within this repository's object database. * The result will be at least `len` characters long, and will be NUL * terminated. * * The non-`_r` version returns a static buffer which remains valid until 4 * more calls to find_unique_abbrev are made. * * The `_r` variant writes to a buffer supplied by the caller, which must be at * least `GIT_MAX_HEXSZ + 1` bytes. The return value is the number of bytes * written (excluding the NUL terminator). * * Note that while this version avoids the static buffer, it is not fully * reentrant, as it calls into other non-reentrant git code. */ extern const char *find_unique_abbrev(const struct object_id *oid, int len); extern int find_unique_abbrev_r(char *hex, const struct object_id *oid, int len); 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) { /* * Teach the compiler that there are only two possibilities of hash size * here, so that it can optimize for this case as much as possible. */ if (the_hash_algo->rawsz == GIT_MAX_RAWSZ) return memcmp(sha1, sha2, GIT_MAX_RAWSZ); return memcmp(sha1, sha2, GIT_SHA1_RAWSZ); } static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) { return hashcmp(oid1->hash, oid2->hash); } static inline int hasheq(const unsigned char *sha1, const unsigned char *sha2) { /* * We write this here instead of deferring to hashcmp so that the * compiler can properly inline it and avoid calling memcmp. */ if (the_hash_algo->rawsz == GIT_MAX_RAWSZ) return !memcmp(sha1, sha2, GIT_MAX_RAWSZ); return !memcmp(sha1, sha2, GIT_SHA1_RAWSZ); } static inline int oideq(const struct object_id *oid1, const struct object_id *oid2) { return hasheq(oid1->hash, oid2->hash); } static inline int is_null_sha1(const unsigned char *sha1) { return hasheq(sha1, null_sha1); } static inline int is_null_oid(const struct object_id *oid) { return hasheq(oid->hash, null_sha1); } static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) { memcpy(sha_dst, sha_src, the_hash_algo->rawsz); } static inline void oidcpy(struct object_id *dst, const struct object_id *src) { memcpy(dst->hash, src->hash, GIT_MAX_RAWSZ); } static inline struct object_id *oiddup(const struct object_id *src) { struct object_id *dst = xmalloc(sizeof(struct object_id)); oidcpy(dst, src); return dst; } static inline void hashclr(unsigned char *hash) { memset(hash, 0, the_hash_algo->rawsz); } static inline void oidclr(struct object_id *oid) { memset(oid->hash, 0, GIT_MAX_RAWSZ); } static inline void oidread(struct object_id *oid, const unsigned char *hash) { memcpy(oid->hash, hash, the_hash_algo->rawsz); } static inline int is_empty_blob_sha1(const unsigned char *sha1) { return hasheq(sha1, the_hash_algo->empty_blob->hash); } static inline int is_empty_blob_oid(const struct object_id *oid) { return oideq(oid, the_hash_algo->empty_blob); } static inline int is_empty_tree_sha1(const unsigned char *sha1) { return hasheq(sha1, the_hash_algo->empty_tree->hash); } static inline int is_empty_tree_oid(const struct object_id *oid) { return oideq(oid, the_hash_algo->empty_tree); } const char *empty_tree_oid_hex(void); const char *empty_blob_oid_hex(void); /* 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); /* * NOTE NOTE NOTE!! * * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must * not be changed. Old repositories have core.sharedrepository written in * numeric format, and therefore these values are preserved for compatibility * reasons. */ enum sharedrepo { PERM_UMASK = 0, OLD_PERM_GROUP = 1, OLD_PERM_EVERYBODY = 2, PERM_GROUP = 0660, PERM_EVERYBODY = 0664 }; int git_config_perm(const char *var, const char *value); 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. 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 * suddenly vanished, probably because another process pruned the * directory while we were working. To be robust against this kind of * race, callers might want to try invoking the function again when it * returns SCLD_VANISHED. * * safe_create_leading_directories() temporarily changes path while it * is working but restores it before returning. * safe_create_leading_directories_const() doesn't modify path, even * temporarily. */ enum scld_error { SCLD_OK = 0, SCLD_FAILED = -1, SCLD_PERMS = -2, SCLD_EXISTS = -3, SCLD_VANISHED = -4 }; 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, int real_home); const char *enter_repo(const char *path, int strict); static inline int is_absolute_path(const char *path) { return is_dir_sep(path[0]) || has_dos_drive_prefix(path); } int is_directory(const char *); 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, 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); const char *relative_path(const char *in, const char *prefix, struct strbuf *sb); int normalize_path_copy_len(char *dst, const char *src, int *prefix_len); int normalize_path_copy(char *dst, const char *src); int longest_ancestor_length(const char *path, struct string_list *prefixes); char *strip_path_suffix(const char *path, const char *suffix); int daemon_avoid_alias(const char *path); /* * These functions match their is_hfs_dotgit() counterparts; see utf8.h for * details. */ int is_ntfs_dotgit(const char *name); int is_ntfs_dotgitmodules(const char *name); int is_ntfs_dotgitignore(const char *name); int is_ntfs_dotgitattributes(const char *name); /* * Returns true iff "str" could be confused as a command-line option when * passed to a sub-program like "ssh". Note that this has nothing to do with * shell-quoting, which should be handled separately; we're assuming here that * the string makes it verbatim to the sub-program. */ int looks_like_command_line_option(const char *str); /** * Return a newly allocated string with the evaluation of * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise * "$HOME/.config/git/$filename". Return NULL upon error. */ extern char *xdg_config_home(const char *filename); /** * Return a newly allocated string with the evaluation of * "$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); extern int git_open_cloexec(const char *name, int flags); #define git_open(name) git_open_cloexec(name, O_RDONLY) extern int unpack_loose_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz); extern int parse_loose_header(const char *hdr, unsigned long *sizep); extern int check_object_signature(const struct object_id *oid, void *buf, unsigned long size, const char *type); extern int finalize_object_file(const char *tmpfile, const char *filename); /* 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) { return hexval_table[c]; } /* * Convert two consecutive hexadecimal digits into a char. Return a * negative value on error. Don't run over the end of short strings. */ static inline int hex2chr(const char *s) { unsigned int val = hexval(s[0]); return (val & ~0xf) ? val : (val << 4) | hexval(s[1]); } /* Convert to/from hex/sha1 representation */ #define MINIMUM_ABBREV minimum_abbrev #define DEFAULT_ABBREV default_abbrev /* used when the code does not know or care what the default abbrev is */ #define FALLBACK_DEFAULT_ABBREV 7 struct object_context { unsigned mode; /* * symlink_path is only used by get_tree_entry_follow_symlinks, * and only for symlinks that point outside the repository. */ struct strbuf symlink_path; /* * If GET_OID_RECORD_PATH is set, this will record path (if any) * found when resolving the name. The caller is responsible for * releasing the memory. */ char *path; }; #define GET_OID_QUIETLY 01 #define GET_OID_COMMIT 02 #define GET_OID_COMMITTISH 04 #define GET_OID_TREE 010 #define GET_OID_TREEISH 020 #define GET_OID_BLOB 040 #define GET_OID_FOLLOW_SYMLINKS 0100 #define GET_OID_RECORD_PATH 0200 #define GET_OID_ONLY_TO_DIE 04000 #define GET_OID_DISAMBIGUATORS \ (GET_OID_COMMIT | GET_OID_COMMITTISH | \ GET_OID_TREE | GET_OID_TREEISH | \ GET_OID_BLOB) enum get_oid_result { FOUND = 0, MISSING_OBJECT = -1, /* The requested object is missing */ SHORT_NAME_AMBIGUOUS = -2, /* The following only apply when symlinks are followed */ DANGLING_SYMLINK = -4, /* * The initial symlink is there, but * (transitively) points to a missing * in-tree file */ SYMLINK_LOOP = -5, NOT_DIR = -6, /* * Somewhere along the symlink chain, a path is * requested which contains a file as a * non-final element. */ }; extern int get_oid(const char *str, struct object_id *oid); extern int get_oid_commit(const char *str, struct object_id *oid); extern int get_oid_committish(const char *str, struct object_id *oid); extern int get_oid_tree(const char *str, struct object_id *oid); extern int get_oid_treeish(const char *str, struct object_id *oid); extern int get_oid_blob(const char *str, struct object_id *oid); extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix); extern enum get_oid_result get_oid_with_context(struct repository *repo, const char *str, unsigned flags, struct object_id *oid, struct object_context *oc); 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); /* * Try to read a SHA1 in hexadecimal format from the 40 characters * starting at hex. Write the 20-byte result to sha1 in binary form. * Return 0 on success. Reading stops if a NUL is encountered in the * input, so it is safe to pass this function an arbitrary * null-terminated string. */ extern int get_sha1_hex(const char *hex, unsigned char *sha1); extern int get_oid_hex(const char *hex, struct object_id *sha1); /* * Read `len` pairs of hexadecimal digits from `hex` and write the * values to `binary` as `len` bytes. Return 0 on success, or -1 if * the input does not consist of hex digits). */ extern int hex_to_bytes(unsigned char *binary, const char *hex, size_t len); /* * Convert a binary hash to its hex equivalent. The `_r` variant is reentrant, * and writes the NUL-terminated output to the buffer `out`, which must be at * least `GIT_MAX_HEXSZ + 1` bytes, and returns a pointer to out for * convenience. * * The non-`_r` variant returns a static buffer, but uses a ring of 4 * buffers, making it safe to make multiple calls for a single statement, like: * * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two)); */ char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash, const struct git_hash_algo *); char *sha1_to_hex_r(char *out, const unsigned char *sha1); char *oid_to_hex_r(char *out, const struct object_id *oid); char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *); /* static buffer result! */ char *sha1_to_hex(const unsigned char *sha1); /* same static buffer */ char *hash_to_hex(const unsigned char *hash); /* same static buffer */ char *oid_to_hex(const struct object_id *oid); /* same static buffer */ /* * 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. * * - "@{upstream}" finds the name of the other ref that * is configured to merge with (missing 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); extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2); extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2); extern int name_compare(const char *name1, size_t len1, const char *name2, size_t len2); extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2); extern void *read_object_with_reference(const struct object_id *oid, const char *required_type, unsigned long *size, struct object_id *oid_ret); extern struct object *peel_to_type(const char *name, int namelen, struct object *o, enum object_type); enum date_mode_type { DATE_NORMAL = 0, DATE_HUMAN, DATE_RELATIVE, DATE_SHORT, DATE_ISO8601, DATE_ISO8601_STRICT, DATE_RFC2822, DATE_STRFTIME, DATE_RAW, DATE_UNIX }; struct date_mode { enum date_mode_type type; const char *strftime_fmt; int local; }; /* * Convenience helper for passing a constant type, like: * * show_date(t, tz, DATE_MODE(NORMAL)); */ #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(timestamp_t time, int timezone, const struct date_mode *mode); void show_date_relative(timestamp_t time, const struct timeval *now, struct strbuf *timebuf); void show_date_human(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, 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) 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(timestamp_t date); #define IDENT_STRICT 1 #define IDENT_NO_DATE 2 #define IDENT_NO_NAME 4 extern const char *git_author_info(int); extern const char *git_committer_info(int); extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int); extern const char *fmt_name(const char *name, const char *email); extern const char *ident_default_name(void); extern const char *ident_default_email(void); extern const char *git_editor(void); extern const char *git_sequence_editor(void); extern const char *git_pager(int stdout_is_tty); extern int is_terminal_dumb(void); extern int git_ident_config(const char *, const char *, void *); extern void reset_ident_date(void); struct ident_split { const char *name_begin; const char *name_end; const char *mail_begin; const char *mail_end; const char *date_begin; const char *date_end; const char *tz_begin; const char *tz_end; }; /* * Signals an success with 0, but time part of the result may be NULL * if the input lacks timestamp and zone */ extern int split_ident_line(struct ident_split *, const char *, int); /* * Like show_date, but pull the timestamp and tz parameters from * the ident_split. It will also sanity-check the values and produce * a well-known sentinel date if they appear bogus. */ const char *show_ident_date(const struct ident_split *id, const struct date_mode *mode); /* * Compare split idents for equality or strict ordering. Note that we * compare only the ident part of the line, ignoring any timestamp. * * Because there are two fields, we must choose one as the primary key; we * currently arbitrarily pick the email. */ extern int ident_cmp(const struct ident_split *, const struct ident_split *); struct checkout { struct index_state *istate; const char *base_dir; int base_dir_len; struct delayed_checkout *delayed_checkout; unsigned force:1, quiet:1, not_new:1, clone:1, refresh_cache:1; }; #define CHECKOUT_INIT { NULL, "" } #define TEMPORARY_FILENAME_LENGTH 25 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath, int *nr_checkouts); extern void enable_delayed_checkout(struct checkout *state); extern int finish_delayed_checkout(struct checkout *state, int *nr_checkouts); struct cache_def { struct strbuf path; int flags; int track_flags; int prefix_len_stat_func; }; #define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 } static inline void cache_def_clear(struct cache_def *cache) { strbuf_release(&cache->path); } extern int has_symlink_leading_path(const char *name, int len); extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int); extern int check_leading_path(const char *name, int len); extern int has_dirs_only_path(const char *name, int len, int prefix_len); extern void schedule_dir_for_removal(const char *name, int len); extern void remove_scheduled_dirs(void); struct pack_window { struct pack_window *next; unsigned char *base; off_t offset; size_t len; unsigned int last_used; unsigned int inuse_cnt; }; struct pack_entry { off_t offset; struct packed_git *p; }; /* * 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(struct strbuf *temp_filename, const char *pattern); /* * Create a pack .keep file named "name" (which should generally be the output * of odb_pack_name). Returns a file descriptor opened for writing, or -1 on * error. */ extern int odb_pack_keep(const char *name); /* * Set this to 0 to prevent oid_object_info_extended() from fetching missing * blobs. This has a difference only if extensions.partialClone is set. * * Its default value is 1. */ extern int fetch_if_missing; /* Dumb servers support */ extern int update_server_info(int); extern const char *get_log_output_encoding(void); extern const char *get_commit_output_encoding(void); /* * This is a hack for test programs like test-dump-untracked-cache to * ensure that they do not modify the untracked cache when reading it. * Do not use it otherwise! */ extern int ignore_untracked_cache_config; extern int committer_ident_sufficiently_given(void); extern int author_ident_sufficiently_given(void); extern const char *git_commit_encoding; extern const char *git_log_output_encoding; extern const char *git_mailmap_file; extern const char *git_mailmap_blob; /* IO helper functions */ extern void maybe_flush_or_die(FILE *, const char *); __attribute__((format (printf, 2, 3))) extern void fprintf_or_die(FILE *, const char *fmt, ...); #define COPY_READ_ERROR (-2) #define COPY_WRITE_ERROR (-3) extern int copy_fd(int ifd, int ofd); extern int copy_file(const char *dst, const char *src, int mode); extern int copy_file_with_time(const char *dst, const char *src, int mode); extern void write_or_die(int fd, const void *buf, size_t count); extern void fsync_or_die(int fd, const char *); extern ssize_t read_in_full(int fd, void *buf, size_t count); extern ssize_t write_in_full(int fd, const void *buf, size_t count); extern ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset); static inline ssize_t write_str_in_full(int fd, const char *str) { return write_in_full(fd, str, strlen(str)); } /** * Open (and truncate) the file at path, write the contents of buf to it, * and close it. Dies if any errors are encountered. */ extern void write_file_buf(const char *path, const char *buf, size_t len); /** * Like write_file_buf(), but format the contents into a buffer first. * Additionally, write_file() will append a newline if one is not already * present, making it convenient to write text files: * * write_file(path, "counter: %d", ctr); */ __attribute__((format (printf, 2, 3))) extern void write_file(const char *path, const char *fmt, ...); /* pager.c */ extern void setup_pager(void); extern int pager_in_use(void); extern int pager_use_color; extern int term_columns(void); extern int decimal_width(uintmax_t); extern int check_pager_config(const char *cmd); extern void prepare_pager_args(struct child_process *, const char *pager); extern const char *editor_program; extern const char *askpass_program; extern const char *excludes_file; /* base85 */ int decode_85(char *dst, const char *line, int linelen); void encode_85(char *buf, const unsigned char *data, int bytes); /* pkt-line.c */ void packet_trace_identity(const char *prog); /* add */ /* * return 0 if success, 1 - if addition of a file failed and * ADD_FILES_IGNORE_ERRORS was specified in flags */ int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags); /* diff.c */ extern int diff_auto_refresh_index; /* match-trees.c */ void shift_tree(const struct object_id *, const struct object_id *, struct object_id *, int); void shift_tree_by(const struct object_id *, const struct object_id *, struct object_id *, const char *); /* * whitespace rules. * used by both diff and apply * last two digits are tab width */ #define WS_BLANK_AT_EOL 0100 #define WS_SPACE_BEFORE_TAB 0200 #define WS_INDENT_WITH_NON_TAB 0400 #define WS_CR_AT_EOL 01000 #define WS_BLANK_AT_EOF 02000 #define WS_TAB_IN_INDENT 04000 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF) #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8) #define WS_TAB_WIDTH_MASK 077 /* All WS_* -- when extended, adapt diff.c emit_symbol */ #define WS_RULE_MASK 07777 extern unsigned whitespace_rule_cfg; extern unsigned whitespace_rule(struct index_state *, const char *); extern unsigned parse_whitespace_rule(const char *); extern unsigned ws_check(const char *line, int len, unsigned ws_rule); extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws); extern char *whitespace_error_string(unsigned ws); extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *); extern int ws_blank_line(const char *line, int len, unsigned ws_rule); #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK) /* ls-files */ void overlay_tree_on_index(struct index_state *istate, const char *tree_name, const char *prefix); /* setup.c */ struct startup_info { int have_repository; const char *prefix; }; extern struct startup_info *startup_info; /* merge.c */ struct commit_list; int try_merge_command(struct repository *r, 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(struct repository *r, const struct object_id *from, const struct object_id *to, int overwrite_ignore); int sane_execvp(const char *file, char *const argv[]); /* * A struct to encapsulate the concept of whether a file has changed * since we last checked it. This uses criteria similar to those used * for the index. */ struct stat_validity { struct stat_data *sd; }; void stat_validity_clear(struct stat_validity *sv); /* * Returns 1 if the path is a regular file (or a symlink to a regular * file) and matches the saved stat_validity, 0 otherwise. A missing * or inaccessible file is considered a match if the struct was just * initialized, or if the previous update found an inaccessible file. */ int stat_validity_check(struct stat_validity *sv, const char *path); /* * Update the stat_validity from a file opened at descriptor fd. If * the file is missing, inaccessible, or not a regular file, then * future calls to stat_validity_check will match iff one of those * conditions continues to be true. */ void stat_validity_update(struct stat_validity *sv, int fd); int versioncmp(const char *s1, const char *s2); void sleep_millisec(int millisec); /* * Create a directory and (if share is nonzero) adjust its permissions * according to the shared_repository setting. Only use this for * directories under $GIT_DIR. Don't use it for working tree * directories. */ void safe_create_dir(const char *dir, int share); /* * Should we print an ellipsis after an abbreviated SHA-1 value * when doing diff-raw output or indicating a detached HEAD? */ extern int print_sha1_ellipsis(void); /* Return 1 if the file is empty or does not exists, 0 otherwise. */ extern int is_empty_or_missing_file(const char *filename); #endif /* CACHE_H */