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pack-bitmap: write multi-pack bitmaps

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Write multi-pack bitmaps in the format described by
Documentation/technical/bitmap-format.txt, inferring their presence with
the absence of '--bitmap'.

To write a multi-pack bitmap, this patch attempts to reuse as much of
the existing machinery from pack-objects as possible. Specifically, the
MIDX code prepares a packing_data struct that pretends as if a single
packfile has been generated containing all of the objects contained
within the MIDX.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Taylor Blau
2021-08-31 16:52:24 -04:00
committed by Junio C Hamano
parent 0f533c7284
commit c528e17966
4 changed files with 215 additions and 9 deletions
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2
builtin/multi-pack-index.c
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@ -68,6 +68,8 @@ static int cmd_multi_pack_index_write(int argc, const char **argv)
OPT_STRING(0, "preferred-pack", &opts.preferred_pack,
N_("preferred-pack"),
N_("pack for reuse when computing a multi-pack bitmap")),
OPT_BIT(0, "bitmap", &opts.flags, N_("write multi-pack bitmap"),
MIDX_WRITE_BITMAP | MIDX_WRITE_REV_INDEX),
OPT_END(),
};