cff9711616
The multi-pack-index tracks objects in a collection of pack-files. Only one copy of each object is indexed, using the modified time of the pack-files to determine tie-breakers. It is possible to have a pack-file with no referenced objects because all objects have a duplicate in a newer pack-file. Introduce a new 'expire' subcommand to the multi-pack-index builtin. This subcommand will delete these unused pack-files and rewrite the multi-pack-index to no longer refer to those files. More details about the specifics will follow as the method is implemented. Add a test that verifies the 'expire' subcommand is correctly wired, but will still be valid when the verb is implemented. Specifically, create a set of packs that should all have referenced objects and should not be removed during an 'expire' operation. The packs are created carefully to ensure they have a specific order when sorted by size. This will be important in a later test. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
#ifndef MIDX_H
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#define MIDX_H
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#include "repository.h"
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struct object_id;
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struct pack_entry;
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struct repository;
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#define GIT_TEST_MULTI_PACK_INDEX "GIT_TEST_MULTI_PACK_INDEX"
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struct multi_pack_index {
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struct multi_pack_index *next;
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int fd;
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const unsigned char *data;
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size_t data_len;
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uint32_t signature;
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unsigned char version;
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unsigned char hash_len;
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unsigned char num_chunks;
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uint32_t num_packs;
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uint32_t num_objects;
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int local;
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const unsigned char *chunk_pack_names;
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const uint32_t *chunk_oid_fanout;
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const unsigned char *chunk_oid_lookup;
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const unsigned char *chunk_object_offsets;
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const unsigned char *chunk_large_offsets;
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const char **pack_names;
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struct packed_git **packs;
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char object_dir[FLEX_ARRAY];
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};
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struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local);
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int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id);
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int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result);
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struct object_id *nth_midxed_object_oid(struct object_id *oid,
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struct multi_pack_index *m,
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uint32_t n);
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int fill_midx_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e, struct multi_pack_index *m);
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int midx_contains_pack(struct multi_pack_index *m, const char *idx_or_pack_name);
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int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local);
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int write_midx_file(const char *object_dir);
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void clear_midx_file(struct repository *r);
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int verify_midx_file(struct repository *r, const char *object_dir);
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int expire_midx_packs(struct repository *r, const char *object_dir);
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void close_midx(struct multi_pack_index *m);
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#endif
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