diff options
Diffstat (limited to 'midx.c')
| -rw-r--r-- | midx.c | 38 |
1 files changed, 34 insertions, 4 deletions
@@ -33,6 +33,7 @@ #define MIDX_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */ #define MIDX_CHUNKID_OBJECTOFFSETS 0x4f4f4646 /* "OOFF" */ #define MIDX_CHUNKID_LARGEOFFSETS 0x4c4f4646 /* "LOFF" */ +#define MIDX_CHUNKID_REVINDEX 0x52494458 /* "RIDX" */ #define MIDX_CHUNK_FANOUT_SIZE (sizeof(uint32_t) * 256) #define MIDX_CHUNK_OFFSET_WIDTH (2 * sizeof(uint32_t)) #define MIDX_CHUNK_LARGE_OFFSET_WIDTH (sizeof(uint64_t)) @@ -161,6 +162,9 @@ struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local pair_chunk(cf, MIDX_CHUNKID_LARGEOFFSETS, &m->chunk_large_offsets); + if (git_env_bool("GIT_TEST_MIDX_READ_RIDX", 1)) + pair_chunk(cf, MIDX_CHUNKID_REVINDEX, &m->chunk_revindex); + m->num_objects = ntohl(m->chunk_oid_fanout[255]); CALLOC_ARRAY(m->pack_names, m->num_packs); @@ -833,6 +837,18 @@ static int write_midx_large_offsets(struct hashfile *f, return 0; } +static int write_midx_revindex(struct hashfile *f, + void *data) +{ + struct write_midx_context *ctx = data; + uint32_t i; + + for (i = 0; i < ctx->entries_nr; i++) + hashwrite_be32(f, ctx->pack_order[i]); + + return 0; +} + struct midx_pack_order_data { uint32_t nr; uint32_t pack; @@ -1061,6 +1077,9 @@ static int write_midx_bitmap(char *midx_name, unsigned char *midx_hash, char *bitmap_name = xstrfmt("%s-%s.bitmap", midx_name, hash_to_hex(midx_hash)); int ret; + if (!ctx->entries_nr) + BUG("cannot write a bitmap without any objects"); + if (flags & MIDX_WRITE_BITMAP_HASH_CACHE) options |= BITMAP_OPT_HASH_CACHE; @@ -1385,6 +1404,12 @@ static int write_midx_internal(const char *object_dir, goto cleanup; } + if (!ctx.entries_nr) { + if (flags & MIDX_WRITE_BITMAP) + warning(_("refusing to write multi-pack .bitmap without any objects")); + flags &= ~(MIDX_WRITE_REV_INDEX | MIDX_WRITE_BITMAP); + } + cf = init_chunkfile(f); add_chunk(cf, MIDX_CHUNKID_PACKNAMES, pack_name_concat_len, @@ -1403,16 +1428,21 @@ static int write_midx_internal(const char *object_dir, (size_t)ctx.num_large_offsets * MIDX_CHUNK_LARGE_OFFSET_WIDTH, write_midx_large_offsets); + if (flags & (MIDX_WRITE_REV_INDEX | MIDX_WRITE_BITMAP)) { + ctx.pack_order = midx_pack_order(&ctx); + add_chunk(cf, MIDX_CHUNKID_REVINDEX, + ctx.entries_nr * sizeof(uint32_t), + write_midx_revindex); + } + write_midx_header(f, get_num_chunks(cf), ctx.nr - dropped_packs); write_chunkfile(cf, &ctx); finalize_hashfile(f, midx_hash, CSUM_FSYNC | CSUM_HASH_IN_STREAM); free_chunkfile(cf); - if (flags & (MIDX_WRITE_REV_INDEX | MIDX_WRITE_BITMAP)) - ctx.pack_order = midx_pack_order(&ctx); - - if (flags & MIDX_WRITE_REV_INDEX) + if (flags & MIDX_WRITE_REV_INDEX && + git_env_bool("GIT_TEST_MIDX_WRITE_REV", 0)) write_midx_reverse_index(midx_name.buf, midx_hash, &ctx); if (flags & MIDX_WRITE_BITMAP) { if (write_midx_bitmap(midx_name.buf, midx_hash, &ctx, |