git/t/t5326-multi-pack-bitmaps.sh

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#!/bin/sh
test_description='exercise basic multi-pack bitmap functionality'
. ./test-lib.sh
. "${TEST_DIRECTORY}/lib-bitmap.sh"
# We'll be writing our own midx and bitmaps, so avoid getting confused by the
# automatic ones.
GIT_TEST_MULTI_PACK_INDEX=0
GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0
# This test exercise multi-pack bitmap functionality where the object order is
# stored and read from a special chunk within the MIDX, so use the default
# behavior here.
sane_unset GIT_TEST_MIDX_WRITE_REV
sane_unset GIT_TEST_MIDX_READ_RIDX
midx_bitmap_core
bitmap_reuse_tests() {
from=$1
to=$2
test_expect_success "setup pack reuse tests ($from -> $to)" '
rm -fr repo &&
git init repo &&
(
cd repo &&
test_commit_bulk 16 &&
git tag old-tip &&
git config core.multiPackIndex true &&
if test "MIDX" = "$from"
then
git repack -Ad &&
git multi-pack-index write --bitmap
else
git repack -Adb
fi
)
'
test_expect_success "build bitmap from existing ($from -> $to)" '
(
cd repo &&
test_commit_bulk --id=further 16 &&
git tag new-tip &&
if test "MIDX" = "$to"
then
git repack -d &&
git multi-pack-index write --bitmap
else
git repack -Adb
fi
)
'
test_expect_success "verify resulting bitmaps ($from -> $to)" '
(
cd repo &&
git for-each-ref &&
git rev-list --test-bitmap refs/tags/old-tip &&
git rev-list --test-bitmap refs/tags/new-tip
)
'
}
bitmap_reuse_tests 'pack' 'MIDX'
bitmap_reuse_tests 'MIDX' 'pack'
bitmap_reuse_tests 'MIDX' 'MIDX'
test_expect_success 'missing object closure fails gracefully' '
rm -fr repo &&
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit loose &&
test_commit packed &&
# Do not pass "--revs"; we want a pack without the "loose"
# commit.
git pack-objects $objdir/pack/pack <<-EOF &&
$(git rev-parse packed)
EOF
test_must_fail git multi-pack-index write --bitmap 2>err &&
grep "doesn.t have full closure" err &&
test_path_is_missing $midx
)
'
midx_bitmap_partial_tests
test_expect_success 'removing a MIDX clears stale bitmaps' '
rm -fr repo &&
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit base &&
git repack &&
git multi-pack-index write --bitmap &&
# Write a MIDX and bitmap; remove the MIDX but leave the bitmap.
stale_bitmap=$midx-$(midx_checksum $objdir).bitmap &&
rm $midx &&
# Then write a new MIDX.
test_commit new &&
git repack &&
git multi-pack-index write --bitmap &&
test_path_is_file $midx &&
test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
test_path_is_missing $stale_bitmap
)
'
test_expect_success 'pack.preferBitmapTips' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit_bulk --message="%s" 103 &&
git log --format="%H" >commits.raw &&
sort <commits.raw >commits &&
git log --format="create refs/tags/%s %H" HEAD >refs &&
git update-ref --stdin <refs &&
git multi-pack-index write --bitmap &&
test_path_is_file $midx &&
test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
test-tool bitmap list-commits | sort >bitmaps &&
comm -13 bitmaps commits >before &&
test_line_count = 1 before &&
perl -ne "printf(\"create refs/tags/include/%d \", $.); print" \
<before | git update-ref --stdin &&
rm -fr $midx-$(midx_checksum $objdir).bitmap &&
rm -fr $midx &&
git -c pack.preferBitmapTips=refs/tags/include \
multi-pack-index write --bitmap &&
test-tool bitmap list-commits | sort >bitmaps &&
comm -13 bitmaps commits >after &&
! test_cmp before after
)
'
test_expect_success 'writing a bitmap with --refs-snapshot' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit one &&
test_commit two &&
git rev-parse one >snapshot &&
git repack -ad &&
# First, write a MIDX which see both refs/tags/one and
# refs/tags/two (causing both of those commits to receive
# bitmaps).
git multi-pack-index write --bitmap &&
test_path_is_file $midx &&
test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
test-tool bitmap list-commits | sort >bitmaps &&
grep "$(git rev-parse one)" bitmaps &&
grep "$(git rev-parse two)" bitmaps &&
rm -fr $midx-$(midx_checksum $objdir).bitmap &&
rm -fr $midx &&
# Then again, but with a refs snapshot which only sees
# refs/tags/one.
git multi-pack-index write --bitmap --refs-snapshot=snapshot &&
test_path_is_file $midx &&
test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
test-tool bitmap list-commits | sort >bitmaps &&
grep "$(git rev-parse one)" bitmaps &&
! grep "$(git rev-parse two)" bitmaps
)
'
test_expect_success 'write a bitmap with --refs-snapshot (preferred tips)' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit_bulk --message="%s" 103 &&
git log --format="%H" >commits.raw &&
sort <commits.raw >commits &&
git log --format="create refs/tags/%s %H" HEAD >refs &&
git update-ref --stdin <refs &&
git multi-pack-index write --bitmap &&
test_path_is_file $midx &&
test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
test-tool bitmap list-commits | sort >bitmaps &&
comm -13 bitmaps commits >before &&
test_line_count = 1 before &&
(
grep -vf before commits.raw &&
# mark missing commits as preferred
sed "s/^/+/" before
) >snapshot &&
rm -fr $midx-$(midx_checksum $objdir).bitmap &&
rm -fr $midx &&
git multi-pack-index write --bitmap --refs-snapshot=snapshot &&
test-tool bitmap list-commits | sort >bitmaps &&
comm -13 bitmaps commits >after &&
! test_cmp before after
)
'
test_expect_success 'hash-cache values are propagated from pack bitmaps' '
rm -fr repo &&
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit base &&
test_commit base2 &&
git repack -adb &&
test-tool bitmap dump-hashes >pack.raw &&
test_file_not_empty pack.raw &&
sort pack.raw >pack.hashes &&
test_commit new &&
git repack &&
git multi-pack-index write --bitmap &&
test-tool bitmap dump-hashes >midx.raw &&
sort midx.raw >midx.hashes &&
# ensure that every namehash in the pack bitmap can be found in
# the midx bitmap (i.e., that there are no oid-namehash pairs
# unique to the pack bitmap).
comm -23 pack.hashes midx.hashes >dropped.hashes &&
test_must_be_empty dropped.hashes
)
'
test_expect_success 'no .bitmap is written without any objects' '
rm -fr repo &&
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
empty="$(git pack-objects $objdir/pack/pack </dev/null)" &&
cat >packs <<-EOF &&
pack-$empty.idx
EOF
git multi-pack-index write --bitmap --stdin-packs \
<packs 2>err &&
grep "bitmap without any objects" err &&
test_path_is_file $midx &&
test_path_is_missing $midx-$(midx_checksum $objdir).bitmap
)
'
test_expect_success 'graceful fallback when missing reverse index' '
rm -fr repo &&
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit base &&
# write a pack and MIDX bitmap containing base
git repack -adb &&
git multi-pack-index write --bitmap &&
GIT_TEST_MIDX_READ_RIDX=0 \
git rev-list --use-bitmap-index HEAD 2>err &&
! grep "ignoring extra bitmap file" err
)
'
test_done