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Instead of storing commit graphs in static variables, store them in struct object_store. There are no changes to the signatures of existing functions - they all still only support the_repository, and support for other instances of struct repository will be added in a subsequent commit. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
265 lines
7.6 KiB
C
265 lines
7.6 KiB
C
#ifndef OBJECT_STORE_H
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#define OBJECT_STORE_H
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#include "oidmap.h"
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#include "list.h"
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#include "sha1-array.h"
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#include "strbuf.h"
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struct alternate_object_database {
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struct alternate_object_database *next;
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/* see alt_scratch_buf() */
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struct strbuf scratch;
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size_t base_len;
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/*
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* Used to store the results of readdir(3) calls when searching
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* for unique abbreviated hashes. This cache is never
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* invalidated, thus it's racy and not necessarily accurate.
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* That's fine for its purpose; don't use it for tasks requiring
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* greater accuracy!
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*/
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char loose_objects_subdir_seen[256];
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struct oid_array loose_objects_cache;
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/*
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* Path to the alternative object store. If this is a relative path,
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* it is relative to the current working directory.
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*/
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char path[FLEX_ARRAY];
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};
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void prepare_alt_odb(struct repository *r);
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char *compute_alternate_path(const char *path, struct strbuf *err);
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typedef int alt_odb_fn(struct alternate_object_database *, void *);
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int foreach_alt_odb(alt_odb_fn, void*);
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/*
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* Allocate a "struct alternate_object_database" but do _not_ actually
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* add it to the list of alternates.
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*/
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struct alternate_object_database *alloc_alt_odb(const char *dir);
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/*
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* Add the directory to the on-disk alternates file; the new entry will also
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* take effect in the current process.
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*/
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void add_to_alternates_file(const char *dir);
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/*
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* Add the directory to the in-memory list of alternates (along with any
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* recursive alternates it points to), but do not modify the on-disk alternates
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* file.
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*/
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void add_to_alternates_memory(const char *dir);
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/*
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* Returns a scratch strbuf pre-filled with the alternate object directory,
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* including a trailing slash, which can be used to access paths in the
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* alternate. Always use this over direct access to alt->scratch, as it
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* cleans up any previous use of the scratch buffer.
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*/
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struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);
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struct packed_git {
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struct packed_git *next;
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struct list_head mru;
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struct pack_window *windows;
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off_t pack_size;
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const void *index_data;
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size_t index_size;
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uint32_t num_objects;
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uint32_t num_bad_objects;
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unsigned char *bad_object_sha1;
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int index_version;
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time_t mtime;
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int pack_fd;
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int index; /* for builtin/pack-objects.c */
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unsigned pack_local:1,
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pack_keep:1,
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pack_keep_in_core:1,
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freshened:1,
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do_not_close:1,
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pack_promisor:1;
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unsigned char sha1[20];
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struct revindex_entry *revindex;
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/* something like ".git/objects/pack/xxxxx.pack" */
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char pack_name[FLEX_ARRAY]; /* more */
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};
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struct raw_object_store {
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/*
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* Path to the repository's object store.
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* Cannot be NULL after initialization.
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*/
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char *objectdir;
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/* Path to extra alternate object database if not NULL */
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char *alternate_db;
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struct alternate_object_database *alt_odb_list;
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struct alternate_object_database **alt_odb_tail;
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/*
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* Objects that should be substituted by other objects
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* (see git-replace(1)).
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*/
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struct oidmap *replace_map;
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struct commit_graph *commit_graph;
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unsigned commit_graph_attempted : 1; /* if loading has been attempted */
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/*
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* private data
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*
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* should only be accessed directly by packfile.c
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*/
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struct packed_git *packed_git;
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/* A most-recently-used ordered version of the packed_git list. */
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struct list_head packed_git_mru;
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/*
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* A fast, rough count of the number of objects in the repository.
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* These two fields are not meant for direct access. Use
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* approximate_object_count() instead.
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*/
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unsigned long approximate_object_count;
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unsigned approximate_object_count_valid : 1;
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/*
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* Whether packed_git has already been populated with this repository's
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* packs.
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*/
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unsigned packed_git_initialized : 1;
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};
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struct raw_object_store *raw_object_store_new(void);
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void raw_object_store_clear(struct raw_object_store *o);
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/*
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* Put in `buf` the name of the file in the local object database that
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* would be used to store a loose object with the specified sha1.
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*/
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void sha1_file_name(struct repository *r, struct strbuf *buf, const unsigned char *sha1);
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void *map_sha1_file(struct repository *r, const unsigned char *sha1, unsigned long *size);
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extern void *read_object_file_extended(const struct object_id *oid,
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enum object_type *type,
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unsigned long *size, int lookup_replace);
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static inline void *read_object_file(const struct object_id *oid, enum object_type *type, unsigned long *size)
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{
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return read_object_file_extended(oid, type, size, 1);
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}
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/* Read and unpack an object file into memory, write memory to an object file */
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int oid_object_info(struct repository *r, const struct object_id *, unsigned long *);
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extern int hash_object_file(const void *buf, unsigned long len,
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const char *type, struct object_id *oid);
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extern int write_object_file(const void *buf, unsigned long len,
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const char *type, struct object_id *oid);
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extern int hash_object_file_literally(const void *buf, unsigned long len,
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const char *type, struct object_id *oid,
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unsigned flags);
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extern int pretend_object_file(void *, unsigned long, enum object_type,
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struct object_id *oid);
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extern int force_object_loose(const struct object_id *oid, time_t mtime);
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/*
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* Open the loose object at path, check its hash, and return the contents,
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* type, and size. If the object is a blob, then "contents" may return NULL,
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* to allow streaming of large blobs.
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*
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* Returns 0 on success, negative on error (details may be written to stderr).
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*/
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int read_loose_object(const char *path,
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const struct object_id *expected_oid,
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enum object_type *type,
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unsigned long *size,
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void **contents);
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/*
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* Convenience for sha1_object_info_extended() with a NULL struct
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* object_info. OBJECT_INFO_SKIP_CACHED is automatically set; pass
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* nonzero flags to also set other flags.
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*/
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extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags);
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static inline int has_sha1_file(const unsigned char *sha1)
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{
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return has_sha1_file_with_flags(sha1, 0);
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}
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/* Same as the above, except for struct object_id. */
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extern int has_object_file(const struct object_id *oid);
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extern int has_object_file_with_flags(const struct object_id *oid, int flags);
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/*
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* Return true iff an alternate object database has a loose object
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* with the specified name. This function does not respect replace
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* references.
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*/
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extern int has_loose_object_nonlocal(const struct object_id *);
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extern void assert_oid_type(const struct object_id *oid, enum object_type expect);
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struct object_info {
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/* Request */
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enum object_type *typep;
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unsigned long *sizep;
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off_t *disk_sizep;
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unsigned char *delta_base_sha1;
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struct strbuf *type_name;
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void **contentp;
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/* Response */
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enum {
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OI_CACHED,
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OI_LOOSE,
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OI_PACKED,
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OI_DBCACHED
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} whence;
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union {
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/*
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* struct {
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* ... Nothing to expose in this case
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* } cached;
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* struct {
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* ... Nothing to expose in this case
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* } loose;
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*/
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struct {
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struct packed_git *pack;
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off_t offset;
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unsigned int is_delta;
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} packed;
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} u;
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};
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/*
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* Initializer for a "struct object_info" that wants no items. You may
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* also memset() the memory to all-zeroes.
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*/
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#define OBJECT_INFO_INIT {NULL}
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/* Invoke lookup_replace_object() on the given hash */
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#define OBJECT_INFO_LOOKUP_REPLACE 1
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/* Allow reading from a loose object file of unknown/bogus type */
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#define OBJECT_INFO_ALLOW_UNKNOWN_TYPE 2
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/* Do not check cached storage */
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#define OBJECT_INFO_SKIP_CACHED 4
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/* Do not retry packed storage after checking packed and loose storage */
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#define OBJECT_INFO_QUICK 8
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/* Do not check loose object */
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#define OBJECT_INFO_IGNORE_LOOSE 16
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int oid_object_info_extended(struct repository *r,
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const struct object_id *,
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struct object_info *, unsigned flags);
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#endif /* OBJECT_STORE_H */
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