t5326: test multi-pack bitmap behavior
This patch introduces a new test, t5326, which tests the basic
functionality of multi-pack bitmaps.
Some trivial behavior is tested, such as:
- Whether bitmaps can be generated with more than one pack.
- Whether clones can be served with all objects in the bitmap.
- Whether follow-up fetches can be served with some objects outside of
the server's bitmap
These use lib-bitmap's tests (which in turn were pulled from t5310), and
we cover cases where the MIDX represents both a single pack and multiple
packs.
In addition, some non-trivial and MIDX-specific behavior is tested, too,
including:
- Whether multi-pack bitmaps behave correctly with respect to the
pack-reuse machinery when the base for some object is selected from
a different pack than the delta.
- Whether multi-pack bitmaps correctly respect the
pack.preferBitmapTips configuration.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Taylor Blau
Junio C Hamano
parent
b1b82d1c30
commit
c51f5a6437
|
|
@ -0,0 +1,286 @@
|
|||
#!/bin/sh
|
||||
|
||||
test_description='exercise basic multi-pack bitmap functionality'
|
||||
. ./test-lib.sh
|
||||
. "${TEST_DIRECTORY}/lib-bitmap.sh"
|
||||
|
||||
# We'll be writing our own midx and bitmaps, so avoid getting confused by the
|
||||
# automatic ones.
|
||||
GIT_TEST_MULTI_PACK_INDEX=0
|
||||
GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0
|
||||
|
||||
objdir=.git/objects
|
||||
midx=$objdir/pack/multi-pack-index
|
||||
|
||||
# midx_pack_source <obj>
|
||||
midx_pack_source () {
|
||||
test-tool read-midx --show-objects .git/objects | grep "^$1 " | cut -f2
|
||||
}
|
||||
|
||||
setup_bitmap_history
|
||||
|
||||
test_expect_success 'enable core.multiPackIndex' '
|
||||
git config core.multiPackIndex true
|
||||
'
|
||||
|
||||
test_expect_success 'create single-pack midx with bitmaps' '
|
||||
git repack -ad &&
|
||||
git multi-pack-index write --bitmap &&
|
||||
test_path_is_file $midx &&
|
||||
test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
|
||||
test_path_is_file $midx-$(midx_checksum $objdir).rev
|
||||
'
|
||||
|
||||
basic_bitmap_tests
|
||||
|
||||
test_expect_success 'create new additional packs' '
|
||||
for i in $(test_seq 1 16)
|
||||
do
|
||||
test_commit "$i" &&
|
||||
git repack -d || return 1
|
||||
done &&
|
||||
|
||||
git checkout -b other2 HEAD~8 &&
|
||||
for i in $(test_seq 1 8)
|
||||
do
|
||||
test_commit "side-$i" &&
|
||||
git repack -d || return 1
|
||||
done &&
|
||||
git checkout second
|
||||
'
|
||||
|
||||
test_expect_success 'create multi-pack midx with bitmaps' '
|
||||
git multi-pack-index write --bitmap &&
|
||||
|
||||
ls $objdir/pack/pack-*.pack >packs &&
|
||||
test_line_count = 25 packs &&
|
||||
|
||||
test_path_is_file $midx &&
|
||||
test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
|
||||
test_path_is_file $midx-$(midx_checksum $objdir).rev
|
||||
'
|
||||
|
||||
basic_bitmap_tests
|
||||
|
||||
test_expect_success '--no-bitmap is respected when bitmaps exist' '
|
||||
git multi-pack-index write --bitmap &&
|
||||
|
||||
test_commit respect--no-bitmap &&
|
||||
git repack -d &&
|
||||
|
||||
test_path_is_file $midx &&
|
||||
test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
|
||||
test_path_is_file $midx-$(midx_checksum $objdir).rev &&
|
||||
|
||||
git multi-pack-index write --no-bitmap &&
|
||||
|
||||
test_path_is_file $midx &&
|
||||
test_path_is_missing $midx-$(midx_checksum $objdir).bitmap &&
|
||||
test_path_is_missing $midx-$(midx_checksum $objdir).rev
|
||||
'
|
||||
|
||||
test_expect_success 'setup midx with base from later pack' '
|
||||
# Write a and b so that "a" is a delta on top of base "b", since Git
|
||||
# prefers to delete contents out of a base rather than add to a shorter
|
||||
# object.
|
||||
test_seq 1 128 >a &&
|
||||
test_seq 1 130 >b &&
|
||||
|
||||
git add a b &&
|
||||
git commit -m "initial commit" &&
|
||||
|
||||
a=$(git rev-parse HEAD:a) &&
|
||||
b=$(git rev-parse HEAD:b) &&
|
||||
|
||||
# In the first pack, "a" is stored as a delta to "b".
|
||||
p1=$(git pack-objects .git/objects/pack/pack <<-EOF
|
||||
$a
|
||||
$b
|
||||
EOF
|
||||
) &&
|
||||
|
||||
# In the second pack, "a" is missing, and "b" is not a delta nor base to
|
||||
# any other object.
|
||||
p2=$(git pack-objects .git/objects/pack/pack <<-EOF
|
||||
$b
|
||||
$(git rev-parse HEAD)
|
||||
$(git rev-parse HEAD^{tree})
|
||||
EOF
|
||||
) &&
|
||||
|
||||
git prune-packed &&
|
||||
# Use the second pack as the preferred source, so that "b" occurs
|
||||
# earlier in the MIDX object order, rendering "a" unusable for pack
|
||||
# reuse.
|
||||
git multi-pack-index write --bitmap --preferred-pack=pack-$p2.idx &&
|
||||
|
||||
have_delta $a $b &&
|
||||
test $(midx_pack_source $a) != $(midx_pack_source $b)
|
||||
'
|
||||
|
||||
rev_list_tests 'full bitmap with backwards delta'
|
||||
|
||||
test_expect_success 'clone with bitmaps enabled' '
|
||||
git clone --no-local --bare . clone-reverse-delta.git &&
|
||||
test_when_finished "rm -fr clone-reverse-delta.git" &&
|
||||
|
||||
git rev-parse HEAD >expect &&
|
||||
git --git-dir=clone-reverse-delta.git rev-parse HEAD >actual &&
|
||||
test_cmp expect actual
|
||||
'
|
||||
|
||||
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
|
||||
)
|
||||
'
|
||||
|
||||
test_expect_success 'setup partial bitmaps' '
|
||||
test_commit packed &&
|
||||
git repack &&
|
||||
test_commit loose &&
|
||||
git multi-pack-index write --bitmap 2>err &&
|
||||
test_path_is_file $midx &&
|
||||
test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
|
||||
test_path_is_file $midx-$(midx_checksum $objdir).rev
|
||||
'
|
||||
|
||||
basic_bitmap_tests HEAD~
|
||||
|
||||
test_expect_success 'removing a MIDX clears stale bitmaps' '
|
||||
rm -fr repo &&
|
||||
git init repo &&
|
||||
test_when_finished "rm -fr repo" &&
|
||||
(
|
||||
cd repo &&
|
||||
test_commit base &&
|
||||
git repack &&
|
||||
git multi-pack-index write --bitmap &&
|
||||
|
||||
# Write a MIDX and bitmap; remove the MIDX but leave the bitmap.
|
||||
stale_bitmap=$midx-$(midx_checksum $objdir).bitmap &&
|
||||
stale_rev=$midx-$(midx_checksum $objdir).rev &&
|
||||
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_file $midx-$(midx_checksum $objdir).rev &&
|
||||
test_path_is_missing $stale_bitmap &&
|
||||
test_path_is_missing $stale_rev
|
||||
)
|
||||
'
|
||||
|
||||
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_path_is_file $midx-$(midx_checksum $objdir).rev &&
|
||||
|
||||
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 $midx-$(midx_checksum $objdir).rev &&
|
||||
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_done
|
||||
Loading…
Reference in New Issue