diff options
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 818 |
1 files changed, 283 insertions, 535 deletions
@@ -4,6 +4,7 @@ #include "git-compat-util.h" #include "strbuf.h" #include "hashmap.h" +#include "list.h" #include "advice.h" #include "gettext.h" #include "convert.h" @@ -13,31 +14,8 @@ #include "hash.h" #include "path.h" #include "sha1-array.h" - -#ifndef platform_SHA_CTX -/* - * platform's underlying implementation of SHA-1; could be OpenSSL, - * blk_SHA, Apple CommonCrypto, etc... Note that including - * SHA1_HEADER may have already defined platform_SHA_CTX for our - * own implementations like block-sha1 and ppc-sha1, so we list - * the default for OpenSSL compatible SHA-1 implementations here. - */ -#define platform_SHA_CTX SHA_CTX -#define platform_SHA1_Init SHA1_Init -#define platform_SHA1_Update SHA1_Update -#define platform_SHA1_Final SHA1_Final -#endif - -#define git_SHA_CTX platform_SHA_CTX -#define git_SHA1_Init platform_SHA1_Init -#define git_SHA1_Update platform_SHA1_Update -#define git_SHA1_Final platform_SHA1_Final - -#ifdef SHA1_MAX_BLOCK_SIZE -#include "compat/sha1-chunked.h" -#undef git_SHA1_Update -#define git_SHA1_Update git_SHA1_Update_Chunked -#endif +#include "repository.h" +#include "mem-pool.h" #include <zlib.h> typedef struct git_zstream { @@ -76,6 +54,8 @@ 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 @@ -177,6 +157,7 @@ struct cache_entry { 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; @@ -203,6 +184,7 @@ struct cache_entry { #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) @@ -238,6 +220,7 @@ struct cache_entry { /* Forward structure decls */ struct pathspec; struct child_process; +struct tree; /* * Copy the sha1 and stat state of a cache entry from one to @@ -247,6 +230,7 @@ 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, @@ -255,6 +239,9 @@ static inline void copy_cache_entry(struct cache_entry *dst, /* 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) @@ -326,6 +313,7 @@ static inline unsigned int canon_mode(unsigned int mode) #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; @@ -339,11 +327,15 @@ struct index_state { struct split_index *split_index; struct cache_time timestamp; unsigned name_hash_initialized : 1, - initialized : 1; + initialized : 1, + drop_cache_tree : 1; struct hashmap name_hash; struct hashmap dir_hash; - unsigned char sha1[20]; + struct object_id oid; struct untracked_cache *untracked; + uint64_t fsmonitor_last_update; + struct ewah_bitmap *fsmonitor_dirty; + struct mem_pool *ce_mem_pool; }; extern struct index_state the_index; @@ -355,6 +347,60 @@ 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); + #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS #define active_cache (the_index.cache) #define active_nr (the_index.cache_nr) @@ -363,8 +409,8 @@ extern void free_name_hash(struct index_state *istate); #define active_cache_tree (the_index.cache_tree) #define read_cache() read_index(&the_index) -#define read_cache_from(path) read_index_from(&the_index, (path)) -#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) +#define read_cache_from(path) read_index_from(&the_index, (path), (get_git_dir())) +#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec), 0) #define is_cache_unborn() is_index_unborn(&the_index) #define read_cache_unmerged() read_index_unmerged(&the_index) #define discard_cache() discard_index(&the_index) @@ -389,6 +435,13 @@ extern void free_name_hash(struct index_state *istate); #define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) #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, @@ -417,7 +470,6 @@ 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" @@ -433,6 +485,9 @@ static inline enum object_type object_type(unsigned int mode) #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" @@ -443,6 +498,18 @@ static inline enum object_type object_type(unsigned int mode) #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 @@ -464,7 +531,7 @@ static inline enum object_type object_type(unsigned int mode) */ extern const char * const local_repo_env[]; -extern void setup_git_env(void); +extern void setup_git_env(const char *git_dir); /* * Returns true iff we have a configured git repository (either via @@ -481,8 +548,8 @@ 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(void); -extern int set_git_dir(const char *path); +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); @@ -594,18 +661,59 @@ extern int daemonize(void); /* Initialize and use the cache information */ struct lock_file; extern int read_index(struct index_state *); -extern int read_index_preload(struct index_state *, const struct pathspec *pathspec); +extern void preload_index(struct index_state *index, + const struct pathspec *pathspec, + unsigned int refresh_flags); +extern int read_index_preload(struct index_state *, + 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); +extern int read_index_from(struct index_state *, const char *path, + const char *gitdir); extern int is_index_unborn(struct index_state *); extern int read_index_unmerged(struct index_state *); + +/* For use with `write_locked_index()`. */ #define COMMIT_LOCK (1 << 0) -#define CLOSE_LOCK (1 << 1) +#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 index_has_changes(struct index_state *istate, + 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); @@ -662,7 +770,6 @@ extern int remove_file_from_index(struct index_state *, const char *path); 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 struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options); 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); @@ -679,13 +786,18 @@ extern void *read_blob_data_from_index(const struct index_state *, const char *, #define CE_MATCH_IGNORE_MISSING 0x08 /* enable stat refresh */ #define CE_MATCH_REFRESH 0x10 -extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); -extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); +/* 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 -extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags); -extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags); +#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 @@ -711,15 +823,21 @@ extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); #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 cache_entry *, unsigned int); +extern struct cache_entry *refresh_cache_entry(struct index_state *, struct cache_entry *, unsigned int); +/* + * Opportunistically update the index but do not complain if we can't. + * The lockfile is always committed or rolled back. + */ 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; +extern int verify_ce_order; /* Environment bits from configuration mechanism */ extern int trust_executable_bit; @@ -760,11 +878,9 @@ 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. As an - * optimization it is also set to false if replace references have - * been sought but there were none. + * commands that do not want replace references to be active. */ -extern int check_replace_refs; +extern int read_replace_refs; extern char *git_replace_ref_base; extern int fsync_object_files; @@ -773,6 +889,7 @@ 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 @@ -783,20 +900,17 @@ extern int protect_ntfs; 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; -/* Windows only */ -enum hide_dotfiles_type { - HIDE_DOTFILES_FALSE = 0, - HIDE_DOTFILES_TRUE, - HIDE_DOTFILES_DOTGITONLY -}; -extern enum hide_dotfiles_type hide_dotfiles; - enum log_refs_config { LOG_REFS_UNSET = -1, LOG_REFS_NONE = 0, @@ -805,15 +919,6 @@ enum log_refs_config { }; extern enum log_refs_config log_all_ref_updates; -enum branch_track { - BRANCH_TRACK_UNSPECIFIED = -1, - BRANCH_TRACK_NEVER = 0, - BRANCH_TRACK_REMOTE, - BRANCH_TRACK_ALWAYS, - BRANCH_TRACK_EXPLICIT, - BRANCH_TRACK_OVERRIDE -}; - enum rebase_setup_type { AUTOREBASE_NEVER = 0, AUTOREBASE_LOCAL, @@ -830,7 +935,6 @@ enum push_default_type { PUSH_DEFAULT_UNSPECIFIED }; -extern enum branch_track git_branch_track; extern enum rebase_setup_type autorebase; extern enum push_default_type push_default; @@ -853,11 +957,17 @@ extern int grafts_replace_parents; #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; }; @@ -895,28 +1005,6 @@ extern void check_repository_format(void); #define TYPE_CHANGED 0x0040 /* - * Return the name of the file in the local object database that would - * be used to store a loose object with the specified sha1. The - * return value is a pointer to a statically allocated buffer that is - * overwritten each time the function is called. - */ -extern const char *sha1_file_name(const unsigned char *sha1); - -/* - * Return the name of the (local) packfile with the specified sha1 in - * its name. The return value is a pointer to memory that is - * overwritten each time this function is called. - */ -extern char *sha1_pack_name(const unsigned char *sha1); - -/* - * Return the name of the (local) pack index file with the specified - * sha1 in its name. The return value is a pointer to memory that is - * overwritten each time this function is called. - */ -extern char *sha1_pack_index_name(const unsigned char *sha1); - -/* * 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. @@ -925,21 +1013,31 @@ extern char *sha1_pack_index_name(const unsigned char *sha1); * 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_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes + * 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 unsigned char *sha1, int len); -extern int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len); +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) { - return memcmp(sha1, sha2, GIT_SHA1_RAWSZ); + /* + * This is a temporary optimization hack. By asserting the size here, + * we let the compiler know that it's always going to be 20, which lets + * it turn this fixed-size memcmp into a few inline instructions. + * + * This will need to be extended or ripped out when we learn about + * hashes of different sizes. + */ + if (the_hash_algo->rawsz != 20) + BUG("hash size not yet supported by hashcmp"); + return memcmp(sha1, sha2, the_hash_algo->rawsz); } static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) @@ -947,19 +1045,29 @@ static inline int oidcmp(const struct object_id *oid1, const struct object_id *o return hashcmp(oid1->hash, oid2->hash); } +static inline int hasheq(const unsigned char *sha1, const unsigned char *sha2) +{ + return !hashcmp(sha1, sha2); +} + +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 !hashcmp(sha1, null_sha1); + return hasheq(sha1, null_sha1); } static inline int is_null_oid(const struct object_id *oid) { - return !hashcmp(oid->hash, null_sha1); + return hasheq(oid->hash, null_sha1); } static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) { - memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); + memcpy(sha_dst, sha_src, the_hash_algo->rawsz); } static inline void oidcpy(struct object_id *dst, const struct object_id *src) @@ -976,52 +1084,42 @@ static inline struct object_id *oiddup(const struct object_id *src) static inline void hashclr(unsigned char *hash) { - memset(hash, 0, GIT_SHA1_RAWSZ); + memset(hash, 0, the_hash_algo->rawsz); } static inline void oidclr(struct object_id *oid) { - hashclr(oid->hash); + memset(oid->hash, 0, GIT_MAX_RAWSZ); } - -#define EMPTY_TREE_SHA1_HEX \ - "4b825dc642cb6eb9a060e54bf8d69288fbee4904" -#define EMPTY_TREE_SHA1_BIN_LITERAL \ - "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ - "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" -extern const struct object_id empty_tree_oid; -#define EMPTY_TREE_SHA1_BIN (empty_tree_oid.hash) - -#define EMPTY_BLOB_SHA1_HEX \ - "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" -#define EMPTY_BLOB_SHA1_BIN_LITERAL \ - "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ - "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" -extern const struct object_id empty_blob_oid; -#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash) - +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 !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); + return hasheq(sha1, the_hash_algo->empty_blob->hash); } static inline int is_empty_blob_oid(const struct object_id *oid) { - return !hashcmp(oid->hash, EMPTY_BLOB_SHA1_BIN); + return oideq(oid, the_hash_algo->empty_blob); } static inline int is_empty_tree_sha1(const unsigned char *sha1) { - return !hashcmp(sha1, EMPTY_TREE_SHA1_BIN); + return hasheq(sha1, the_hash_algo->empty_tree->hash); } static inline int is_empty_tree_oid(const struct object_id *oid) { - return !hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN); + 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); @@ -1169,94 +1267,15 @@ extern char *xdg_config_home(const char *filename); */ extern char *xdg_cache_home(const char *filename); -extern void *read_sha1_file_extended(const unsigned char *sha1, - enum object_type *type, - unsigned long *size, int lookup_replace); -static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size) -{ - return read_sha1_file_extended(sha1, type, size, 1); -} - -/* - * This internal function is only declared here for the benefit of - * lookup_replace_object(). Please do not call it directly. - */ -extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1); - -/* - * If object sha1 should be replaced, return the replacement object's - * name (replaced recursively, if necessary). The return value is - * either sha1 or a pointer to a permanently-allocated value. When - * object replacement is suppressed, always return sha1. - */ -static inline const unsigned char *lookup_replace_object(const unsigned char *sha1) -{ - if (!check_replace_refs) - return sha1; - return do_lookup_replace_object(sha1); -} - -/* Read and unpack a sha1 file into memory, write memory to a sha1 file */ -extern int sha1_object_info(const unsigned char *, unsigned long *); -extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1); -extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1); -extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, unsigned char *sha1, unsigned flags); -extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *); -extern int force_object_loose(const unsigned char *sha1, time_t mtime); extern int git_open_cloexec(const char *name, int flags); #define git_open(name) git_open_cloexec(name, O_RDONLY) -extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size); extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz); extern int parse_sha1_header(const char *hdr, unsigned long *sizep); -/* global flag to enable extra checks when accessing packed objects */ -extern int do_check_packed_object_crc; - -extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); +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); -extern int has_sha1_pack(const unsigned char *sha1); - -/* - * Open the loose object at path, check its sha1, and return the contents, - * type, and size. If the object is a blob, then "contents" may return NULL, - * to allow streaming of large blobs. - * - * Returns 0 on success, negative on error (details may be written to stderr). - */ -int read_loose_object(const char *path, - const unsigned char *expected_sha1, - enum object_type *type, - unsigned long *size, - void **contents); - -/* - * Convenience for sha1_object_info_extended() with a NULL struct - * object_info. OBJECT_INFO_SKIP_CACHED is automatically set; pass - * nonzero flags to also set other flags. - */ -extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags); -static inline int has_sha1_file(const unsigned char *sha1) -{ - return has_sha1_file_with_flags(sha1, 0); -} - -/* Same as the above, except for struct object_id. */ -extern int has_object_file(const struct object_id *oid); -extern int has_object_file_with_flags(const struct object_id *oid, int flags); - -/* - * Return true iff an alternate object database has a loose object - * with the specified name. This function does not respect replace - * references. - */ -extern int has_loose_object_nonlocal(const unsigned char *sha1); - -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); @@ -1284,7 +1303,6 @@ static inline int hex2chr(const char *s) #define FALLBACK_DEFAULT_ABBREV 7 struct object_context { - unsigned char tree[20]; unsigned mode; /* * symlink_path is only used by get_tree_entry_follow_symlinks, @@ -1292,38 +1310,37 @@ struct object_context { */ struct strbuf symlink_path; /* - * If GET_SHA1_RECORD_PATH is set, this will record path (if any) + * 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_SHA1_QUIETLY 01 -#define GET_SHA1_COMMIT 02 -#define GET_SHA1_COMMITTISH 04 -#define GET_SHA1_TREE 010 -#define GET_SHA1_TREEISH 020 -#define GET_SHA1_BLOB 040 -#define GET_SHA1_FOLLOW_SYMLINKS 0100 -#define GET_SHA1_RECORD_PATH 0200 -#define GET_SHA1_ONLY_TO_DIE 04000 - -#define GET_SHA1_DISAMBIGUATORS \ - (GET_SHA1_COMMIT | GET_SHA1_COMMITTISH | \ - GET_SHA1_TREE | GET_SHA1_TREEISH | \ - GET_SHA1_BLOB) - -extern int get_sha1(const char *str, unsigned char *sha1); -extern int get_sha1_commit(const char *str, unsigned char *sha1); -extern int get_sha1_committish(const char *str, unsigned char *sha1); -extern int get_sha1_tree(const char *str, unsigned char *sha1); -extern int get_sha1_treeish(const char *str, unsigned char *sha1); -extern int get_sha1_blob(const char *str, unsigned char *sha1); -extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix); -extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *oc); +#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) 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 int get_oid_with_context(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 *); @@ -1341,6 +1358,13 @@ 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 sha1 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_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for @@ -1405,26 +1429,28 @@ extern int df_name_compare(const char *name1, int len1, int mode1, const char *n 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 unsigned char *sha1, +extern void *read_object_with_reference(const struct object_id *oid, const char *required_type, unsigned long *size, - unsigned char *sha1_ret); + 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_RELATIVE, + DATE_SHORT, + DATE_ISO8601, + DATE_ISO8601_STRICT, + DATE_RFC2822, + DATE_STRFTIME, + DATE_RAW, + DATE_UNIX +}; + struct date_mode { - enum date_mode_type { - DATE_NORMAL = 0, - DATE_RELATIVE, - DATE_SHORT, - DATE_ISO8601, - DATE_ISO8601_STRICT, - DATE_RFC2822, - DATE_STRFTIME, - DATE_RAW, - DATE_UNIX - } type; + enum date_mode_type type; const char *strftime_fmt; int local; }; @@ -1460,7 +1486,9 @@ 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); @@ -1505,14 +1533,15 @@ struct 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); +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); +extern int finish_delayed_checkout(struct checkout *state, int *nr_checkouts); struct cache_def { struct strbuf path; @@ -1533,57 +1562,6 @@ 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); -extern struct alternate_object_database { - struct alternate_object_database *next; - - /* see alt_scratch_buf() */ - struct strbuf scratch; - size_t base_len; - - /* - * Used to store the results of readdir(3) calls when searching - * for unique abbreviated hashes. This cache is never - * invalidated, thus it's racy and not necessarily accurate. - * That's fine for its purpose; don't use it for tasks requiring - * greater accuracy! - */ - char loose_objects_subdir_seen[256]; - struct oid_array loose_objects_cache; - - char path[FLEX_ARRAY]; -} *alt_odb_list; -extern void prepare_alt_odb(void); -extern char *compute_alternate_path(const char *path, struct strbuf *err); -typedef int alt_odb_fn(struct alternate_object_database *, void *); -extern int foreach_alt_odb(alt_odb_fn, void*); - -/* - * Allocate a "struct alternate_object_database" but do _not_ actually - * add it to the list of alternates. - */ -struct alternate_object_database *alloc_alt_odb(const char *dir); - -/* - * Add the directory to the on-disk alternates file; the new entry will also - * take effect in the current process. - */ -extern void add_to_alternates_file(const char *dir); - -/* - * Add the directory to the in-memory list of alternates (along with any - * recursive alternates it points to), but do not modify the on-disk alternates - * file. - */ -extern void add_to_alternates_memory(const char *dir); - -/* - * Returns a scratch strbuf pre-filled with the alternate object directory, - * including a trailing slash, which can be used to access paths in the - * alternate. Always use this over direct access to alt->scratch, as it - * cleans up any previous use of the scratch buffer. - */ -extern struct strbuf *alt_scratch_buf(struct alternate_object_database *alt); - struct pack_window { struct pack_window *next; unsigned char *base; @@ -1593,80 +1571,18 @@ struct pack_window { unsigned int inuse_cnt; }; -extern struct packed_git { - struct packed_git *next; - struct pack_window *windows; - off_t pack_size; - const void *index_data; - size_t index_size; - uint32_t num_objects; - uint32_t num_bad_objects; - unsigned char *bad_object_sha1; - int index_version; - time_t mtime; - int pack_fd; - unsigned pack_local:1, - pack_keep:1, - freshened:1, - do_not_close:1; - unsigned char sha1[20]; - struct revindex_entry *revindex; - /* something like ".git/objects/pack/xxxxx.pack" */ - char pack_name[FLEX_ARRAY]; /* more */ -} *packed_git; - -/* - * A most-recently-used ordered version of the packed_git list, which can - * be iterated instead of packed_git (and marked via mru_mark). - */ -struct mru; -extern struct mru *packed_git_mru; - struct pack_entry { off_t offset; - unsigned char sha1[20]; struct packed_git *p; }; -extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path); - -/* A hook to report invalid files in pack directory */ -#define PACKDIR_FILE_PACK 1 -#define PACKDIR_FILE_IDX 2 -#define PACKDIR_FILE_GARBAGE 4 -extern void (*report_garbage)(unsigned seen_bits, const char *path); - -extern void prepare_packed_git(void); -extern void reprepare_packed_git(void); -extern void install_packed_git(struct packed_git *pack); - -/* - * Give a rough count of objects in the repository. This sacrifices accuracy - * for speed. - */ -unsigned long approximate_object_count(void); - -extern struct packed_git *find_sha1_pack(const unsigned char *sha1, - struct packed_git *packs); - -extern void pack_report(void); - /* * 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 *template, const char *pattern); - -/* - * Generate the filename to be used for a pack file with checksum "sha1" and - * extension "ext". The result is written into the strbuf "buf", overwriting - * any existing contents. A pointer to buf->buf is returned as a convenience. - * - * Example: odb_pack_name(out, sha1, "idx") => ".git/objects/pack/pack-1234..idx" - */ -extern char *odb_pack_name(struct strbuf *buf, const unsigned char *sha1, const char *ext); +extern int odb_mkstemp(struct strbuf *temp_filename, const char *pattern); /* * Create a pack .keep file named "name" (which should generally be the output @@ -1676,176 +1592,12 @@ extern char *odb_pack_name(struct strbuf *buf, const unsigned char *sha1, const extern int odb_pack_keep(const char *name); /* - * mmap the index file for the specified packfile (if it is not - * already mmapped). Return 0 on success. - */ -extern int open_pack_index(struct packed_git *); - -/* - * munmap the index file for the specified packfile (if it is - * currently mmapped). - */ -extern void close_pack_index(struct packed_git *); - -extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *); -extern void close_pack_windows(struct packed_git *); -extern void close_all_packs(void); -extern void unuse_pack(struct pack_window **); -extern void clear_delta_base_cache(void); -extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local); - -/* - * Make sure that a pointer access into an mmap'd index file is within bounds, - * and can provide at least 8 bytes of data. - * - * Note that this is only necessary for variable-length segments of the file - * (like the 64-bit extended offset table), as we compare the size to the - * fixed-length parts when we open the file. - */ -extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr); - -/* - * Return the SHA-1 of the nth object within the specified packfile. - * Open the index if it is not already open. The return value points - * at the SHA-1 within the mmapped index. Return NULL if there is an - * 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. - * The index must already be opened. - */ -extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n); - -/* - * If the object named sha1 is present in the specified packfile, - * return its offset within the packfile; otherwise, return 0. - */ -extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *); - -extern int is_pack_valid(struct packed_git *); -extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *); -extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep); -extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t); -extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *); - -/* - * Iterate over the files in the loose-object parts of the object - * directory "path", triggering the following callbacks: - * - * - loose_object is called for each loose object we find. - * - * - loose_cruft is called for any files that do not appear to be - * loose objects. Note that we only look in the loose object - * directories "objects/[0-9a-f]{2}/", so we will not report - * "objects/foobar" as cruft. + * Set this to 0 to prevent sha1_object_info_extended() from fetching missing + * blobs. This has a difference only if extensions.partialClone is set. * - * - loose_subdir is called for each top-level hashed subdirectory - * of the object directory (e.g., "$OBJDIR/f0"). It is called - * after the objects in the directory are processed. - * - * Any callback that is NULL will be ignored. Callbacks returning non-zero - * will end the iteration. - * - * In the "buf" variant, "path" is a strbuf which will also be used as a - * scratch buffer, but restored to its original contents before - * the function returns. - */ -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, - const char *path, - void *data); -typedef int each_loose_subdir_fn(unsigned int nr, - const char *path, - void *data); -int for_each_file_in_obj_subdir(unsigned int subdir_nr, - struct strbuf *path, - each_loose_object_fn obj_cb, - each_loose_cruft_fn cruft_cb, - each_loose_subdir_fn subdir_cb, - void *data); -int for_each_loose_file_in_objdir(const char *path, - each_loose_object_fn obj_cb, - each_loose_cruft_fn cruft_cb, - each_loose_subdir_fn subdir_cb, - void *data); -int for_each_loose_file_in_objdir_buf(struct strbuf *path, - each_loose_object_fn obj_cb, - each_loose_cruft_fn cruft_cb, - each_loose_subdir_fn subdir_cb, - void *data); - -/* - * Iterate over loose and packed objects in both the local - * repository and any alternates repositories (unless the - * LOCAL_ONLY flag is set). - */ -#define FOR_EACH_OBJECT_LOCAL_ONLY 0x1 -typedef int each_packed_object_fn(const struct object_id *oid, - struct packed_git *pack, - uint32_t pos, - void *data); -extern int for_each_loose_object(each_loose_object_fn, void *, unsigned flags); -extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags); - -struct object_info { - /* Request */ - enum object_type *typep; - unsigned long *sizep; - off_t *disk_sizep; - unsigned char *delta_base_sha1; - struct strbuf *typename; - void **contentp; - - /* Response */ - enum { - OI_CACHED, - OI_LOOSE, - OI_PACKED, - OI_DBCACHED - } whence; - union { - /* - * struct { - * ... Nothing to expose in this case - * } cached; - * struct { - * ... Nothing to expose in this case - * } loose; - */ - struct { - struct packed_git *pack; - off_t offset; - unsigned int is_delta; - } packed; - } u; -}; - -/* - * Initializer for a "struct object_info" that wants no items. You may - * also memset() the memory to all-zeroes. + * Its default value is 1. */ -#define OBJECT_INFO_INIT {NULL} - -/* Invoke lookup_replace_object() on the given hash */ -#define OBJECT_INFO_LOOKUP_REPLACE 1 -/* Allow reading from a loose object file of unknown/bogus type */ -#define OBJECT_INFO_ALLOW_UNKNOWN_TYPE 2 -/* Do not check cached storage */ -#define OBJECT_INFO_SKIP_CACHED 4 -/* Do not retry packed storage after checking packed and loose storage */ -#define OBJECT_INFO_QUICK 8 -extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags); -extern int packed_object_info(struct packed_git *pack, off_t offset, struct object_info *); +extern int fetch_if_missing; /* Dumb servers support */ extern int update_server_info(int); @@ -1924,15 +1676,6 @@ extern const char *excludes_file; int decode_85(char *dst, const char *line, int linelen); void encode_85(char *buf, const unsigned char *data, int bytes); -/* alloc.c */ -extern void *alloc_blob_node(void); -extern void *alloc_tree_node(void); -extern void *alloc_commit_node(void); -extern void *alloc_tag_node(void); -extern void *alloc_object_node(void); -extern void alloc_report(void); -extern unsigned int alloc_commit_index(void); - /* pkt-line.c */ void packet_trace_identity(const char *prog); @@ -1964,8 +1707,10 @@ void shift_tree_by(const struct object_id *, const struct object_id *, struct ob #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(const char *); +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); @@ -1978,11 +1723,6 @@ extern int ws_blank_line(const char *line, int len, unsigned ws_rule); void overlay_tree_on_index(struct index_state *istate, const char *tree_name, const char *prefix); -char *alias_lookup(const char *alias); -int split_cmdline(char *cmdline, const char ***argv); -/* Takes a negative value returned by split_cmdline */ -const char *split_cmdline_strerror(int cmdline_errno); - /* setup.c */ struct startup_info { int have_repository; @@ -1992,10 +1732,12 @@ extern struct startup_info *startup_info; /* merge.c */ struct commit_list; -int try_merge_command(const char *strategy, size_t xopts_nr, +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(const struct object_id *from, +int checkout_fast_forward(struct repository *r, + const struct object_id *from, const struct object_id *to, int overwrite_ignore); @@ -2040,4 +1782,10 @@ void sleep_millisec(int millisec); */ 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); + #endif /* CACHE_H */ |