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repack: simplify handling of auto-bitmaps and .keep files

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Commit 7328482253 (repack: disable bitmaps-by-default if .keep files
exist, 2019-06-29) taught repack to prefer disabling bitmaps to
duplicating objects (unless bitmaps were asked for explicitly).

But there's an easier way to do this: if we keep passing the
--honor-pack-keep flag to pack-objects when auto-enabling bitmaps, then
pack-objects already makes the same decision (it will disable bitmaps
rather than duplicate). Better still, pack-objects can actually decide
to do so based not just on the presence of a .keep file, but on whether
that .keep file actually impacts the new pack we're making (so if we're
racing with a push or fetch, for example, their temporary .keep file
will not block us from generating bitmaps if they haven't yet updated
their refs).

And because repack uses the --write-bitmap-index-quiet flag, we don't
have to worry about pack-objects generating confusing warnings when it
does see a .keep file. We can confirm this by tweaking the .keep test to
check repack's stderr.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
2019-07-31 01:40:56 -04:00
committed by Junio C Hamano
parent 25575015ca
commit 7ff024e7b3
2 changed files with 4 additions and 16 deletions
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3
t/t7700-repack.sh
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@@ -245,7 +245,8 @@ test_expect_success 'no bitmaps created if .keep files present' '
keep=${pack%.pack}.keep &&
test_when_finished "rm -f \"\$keep\"" &&
>"$keep" &&
git -C bare.git repack -ad &&
git -C bare.git repack -ad 2>stderr &&
test_must_be_empty stderr &&
find bare.git/objects/pack/ -type f -name "*.bitmap" >actual &&
test_must_be_empty actual
'