sha1_file: add repository argument to link_alt_odb_entries
[git/git.git] / object-store.h
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1#ifndef OBJECT_STORE_H
2#define OBJECT_STORE_H
3
031dc927 4struct alternate_object_database {
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5 struct alternate_object_database *next;
6
7 /* see alt_scratch_buf() */
8 struct strbuf scratch;
9 size_t base_len;
10
11 /*
12 * Used to store the results of readdir(3) calls when searching
13 * for unique abbreviated hashes. This cache is never
14 * invalidated, thus it's racy and not necessarily accurate.
15 * That's fine for its purpose; don't use it for tasks requiring
16 * greater accuracy!
17 */
18 char loose_objects_subdir_seen[256];
19 struct oid_array loose_objects_cache;
20
21 char path[FLEX_ARRAY];
031dc927 22};
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23void prepare_alt_odb(void);
24char *compute_alternate_path(const char *path, struct strbuf *err);
25typedef int alt_odb_fn(struct alternate_object_database *, void *);
26int foreach_alt_odb(alt_odb_fn, void*);
27
28/*
29 * Allocate a "struct alternate_object_database" but do _not_ actually
30 * add it to the list of alternates.
31 */
32struct alternate_object_database *alloc_alt_odb(const char *dir);
33
34/*
35 * Add the directory to the on-disk alternates file; the new entry will also
36 * take effect in the current process.
37 */
38void add_to_alternates_file(const char *dir);
39
40/*
41 * Add the directory to the in-memory list of alternates (along with any
42 * recursive alternates it points to), but do not modify the on-disk alternates
43 * file.
44 */
45void add_to_alternates_memory(const char *dir);
46
47/*
48 * Returns a scratch strbuf pre-filled with the alternate object directory,
49 * including a trailing slash, which can be used to access paths in the
50 * alternate. Always use this over direct access to alt->scratch, as it
51 * cleans up any previous use of the scratch buffer.
52 */
53struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);
54
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55struct packed_git {
56 struct packed_git *next;
57 struct list_head mru;
58 struct pack_window *windows;
59 off_t pack_size;
60 const void *index_data;
61 size_t index_size;
62 uint32_t num_objects;
63 uint32_t num_bad_objects;
64 unsigned char *bad_object_sha1;
65 int index_version;
66 time_t mtime;
67 int pack_fd;
68 unsigned pack_local:1,
69 pack_keep:1,
70 freshened:1,
71 do_not_close:1,
72 pack_promisor:1;
73 unsigned char sha1[20];
74 struct revindex_entry *revindex;
75 /* something like ".git/objects/pack/xxxxx.pack" */
76 char pack_name[FLEX_ARRAY]; /* more */
77};
78
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79struct raw_object_store {
80 /*
81 * Path to the repository's object store.
82 * Cannot be NULL after initialization.
83 */
84 char *objectdir;
85
86 /* Path to extra alternate object database if not NULL */
87 char *alternate_db;
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88
89 struct alternate_object_database *alt_odb_list;
90 struct alternate_object_database **alt_odb_tail;
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91
92 /*
93 * private data
94 *
95 * should only be accessed directly by packfile.c
96 */
97
98 struct packed_git *packed_git;
99 /* A most-recently-used ordered version of the packed_git list. */
100 struct list_head packed_git_mru;
5508f693 101
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102 /*
103 * A fast, rough count of the number of objects in the repository.
104 * These two fields are not meant for direct access. Use
105 * approximate_object_count() instead.
106 */
107 unsigned long approximate_object_count;
108 unsigned approximate_object_count_valid : 1;
109
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110 /*
111 * Whether packed_git has already been populated with this repository's
112 * packs.
113 */
114 unsigned packed_git_initialized : 1;
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115};
116
117struct raw_object_store *raw_object_store_new(void);
118void raw_object_store_clear(struct raw_object_store *o);
119
120#endif /* OBJECT_STORE_H */