diff options
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 215 |
1 files changed, 65 insertions, 150 deletions
@@ -4,7 +4,7 @@ #include "git-compat-util.h" #include "strbuf.h" #include "hashmap.h" -#include "mru.h" +#include "list.h" #include "advice.h" #include "gettext.h" #include "convert.h" @@ -16,31 +16,6 @@ #include "sha1-array.h" #include "repository.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 <zlib.h> typedef struct git_zstream { z_stream z; @@ -345,7 +320,8 @@ 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]; @@ -371,7 +347,7 @@ 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_from(path) read_index_from(&the_index, (path), (get_git_dir())) #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) #define is_cache_unborn() is_index_unborn(&the_index) #define read_cache_unmerged() read_index_unmerged(&the_index) @@ -483,7 +459,7 @@ 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 @@ -501,7 +477,7 @@ 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 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); @@ -616,12 +592,14 @@ extern int read_index(struct index_state *); extern int read_index_preload(struct index_state *, const struct pathspec *pathspec); 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 SKIP_IF_UNCHANGED (1 << 1) /* * Write the index while holding an already-taken lock. Close the lock, @@ -638,6 +616,9 @@ extern int read_index_unmerged(struct index_state *); * 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); @@ -914,10 +895,13 @@ 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; struct repository_format { int version; int precious_objects; + char *partial_clone; /* value of extensions.partialclone */ int is_bare; int hash_algo; char *work_tree; @@ -957,14 +941,6 @@ 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 an abbreviated sha1 unique within this repository's object database. * The result will be at least `len` characters long, and will be NUL * terminated. @@ -973,14 +949,14 @@ extern const char *sha1_file_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; @@ -1029,7 +1005,7 @@ static inline void hashclr(unsigned char *hash) static inline void oidclr(struct object_id *oid) { - hashclr(oid->hash); + memset(oid->hash, 0, GIT_MAX_RAWSZ); } @@ -1047,8 +1023,6 @@ extern const struct object_id empty_tree_oid; "\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 int is_empty_blob_sha1(const unsigned char *sha1) { @@ -1209,19 +1183,19 @@ 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) +extern void *read_object_file_extended(const struct object_id *oid, + enum object_type *type, + unsigned long *size, int lookup_replace); +static inline void *read_object_file(const struct object_id *oid, enum object_type *type, unsigned long *size) { - return read_sha1_file_extended(sha1, type, size, 1); + return read_object_file_extended(oid, 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); +extern const struct object_id *do_lookup_replace_object(const struct object_id *oid); /* * If object sha1 should be replaced, return the replacement object's @@ -1229,39 +1203,49 @@ extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1); * 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) +static inline const struct object_id *lookup_replace_object(const struct object_id *oid) { if (!check_replace_refs) - return sha1; - return do_lookup_replace_object(sha1); + return oid; + return do_lookup_replace_object(oid); } -/* 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, struct object_id *oid, 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); +/* Read and unpack an object file into memory, write memory to an object file */ +extern int oid_object_info(const struct object_id *, unsigned long *); + +extern int hash_object_file(const void *buf, unsigned long len, + const char *type, struct object_id *oid); + +extern int write_object_file(const void *buf, unsigned long len, + const char *type, struct object_id *oid); + +extern int hash_object_file_literally(const void *buf, unsigned long len, + const char *type, struct object_id *oid, + unsigned flags); + +extern int pretend_object_file(void *, unsigned long, enum object_type, + struct object_id *oid); + +extern int force_object_loose(const struct object_id *oid, 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); -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); /* - * Open the loose object at path, check its sha1, and return the contents, + * Open the loose object at path, check its hash, 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, + const struct object_id *expected_oid, enum object_type *type, unsigned long *size, void **contents); @@ -1288,7 +1272,7 @@ extern int has_object_file_with_flags(const struct object_id *oid, int flags); */ extern int has_loose_object_nonlocal(const unsigned char *sha1); -extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect); +extern void assert_oid_type(const struct object_id *oid, enum object_type expect); /* Helper to check and "touch" a file */ extern int check_and_freshen_file(const char *fn, int freshen); @@ -1444,10 +1428,10 @@ 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); @@ -1573,57 +1557,6 @@ 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; @@ -1633,34 +1566,6 @@ 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). - */ -extern struct mru packed_git_mru; - struct pack_entry { off_t offset; unsigned char sha1[20]; @@ -1673,7 +1578,7 @@ struct pack_entry { * 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); +extern int odb_mkstemp(struct strbuf *temp_filename, const char *pattern); /* * Create a pack .keep file named "name" (which should generally be the output @@ -1744,7 +1649,7 @@ struct object_info { unsigned long *sizep; off_t *disk_sizep; unsigned char *delta_base_sha1; - struct strbuf *typename; + struct strbuf *type_name; void **contentp; /* Response */ @@ -1785,7 +1690,17 @@ struct object_info { #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); +/* Do not check loose object */ +#define OBJECT_INFO_IGNORE_LOOSE 16 +extern int oid_object_info_extended(const struct object_id *, struct object_info *, unsigned flags); + +/* + * Set this to 0 to prevent sha1_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); |