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t5325: check both on-disk and in-memory reverse index

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Right now, the test suite can be run with 'GIT_TEST_WRITE_REV_INDEX=1'
in the environment, which causes all operations which write a pack to
also write a .rev file.

To prepare for when that eventually becomes the default, we should
continue to test the in-memory reverse index, too, in order to avoid
losing existing coverage. Unfortunately, explicit existing coverage is
rather sparse, so only a basic test is added that compares the result of

    git rev-list --objects --no-object-names --all |
    git cat-file --batch-check='%(objectsize:disk) %(objectname)'

with and without an on-disk reverse index.

Suggested-by: Jeff King <peff@peff.net>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Taylor Blau 2021-01-28 20:32:02 -05:00 committed by Junio C Hamano
parent ec8e7760ac
commit 6885cd7dc5
1 changed files with 23 additions and 0 deletions
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23
t/t5325-reverse-index.sh
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@ -94,4 +94,27 @@ test_expect_success 'reverse index is not generated when available on disk' '
--batch-check="%(objectsize:disk)" <tip
'
test_expect_success 'revindex in-memory vs on-disk' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit commit &&
git rev-list --objects --no-object-names --all >objects &&
git -c pack.writeReverseIndex=false repack -ad &&
test_path_is_missing $packdir/pack-*.rev &&
git cat-file --batch-check="%(objectsize:disk) %(objectname)" \
<objects >in-core &&
git -c pack.writeReverseIndex=true repack -ad &&
test_path_is_file $packdir/pack-*.rev &&
git cat-file --batch-check="%(objectsize:disk) %(objectname)" \
<objects >on-disk &&
test_cmp on-disk in-core
)
'
test_done