git/t/t5329-pack-objects-cruft.sh
Derrick Stolee 9aa1cba01a t5329: test 'git gc --cruft' without '--prune=now'
Replace a 'git repack --cruft -d' with the wrapper 'git gc --cruft' to
exercise some logic in builtin/gc.c that adds the '--cruft' option to
the underlying 'git repack' command.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-16 11:59:55 -07:00

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#!/bin/sh
test_description='cruft pack related pack-objects tests'
. ./test-lib.sh
objdir=.git/objects
packdir=$objdir/pack
basic_cruft_pack_tests () {
expire="$1"
test_expect_success "unreachable loose objects are packed (expire $expire)" '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit base &&
git repack -Ad &&
test_commit loose &&
test-tool chmtime +2000 "$objdir/$(test_oid_to_path \
$(git rev-parse loose:loose.t))" &&
test-tool chmtime +1000 "$objdir/$(test_oid_to_path \
$(git rev-parse loose^{tree}))" &&
(
git rev-list --objects --no-object-names base..loose |
while read oid
do
path="$objdir/$(test_oid_to_path "$oid")" &&
printf "%s %d\n" "$oid" "$(test-tool chmtime --get "$path")"
done |
sort -k1
) >expect &&
keep="$(basename "$(ls $packdir/pack-*.pack)")" &&
cruft="$(echo $keep | git pack-objects --cruft \
--cruft-expiration="$expire" $packdir/pack)" &&
test-tool pack-mtimes "pack-$cruft.mtimes" >actual &&
test_cmp expect actual
)
'
test_expect_success "unreachable packed objects are packed (expire $expire)" '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit packed &&
git repack -Ad &&
test_commit other &&
git rev-list --objects --no-object-names packed.. >objects &&
keep="$(basename "$(ls $packdir/pack-*.pack)")" &&
other="$(git pack-objects --delta-base-offset \
$packdir/pack <objects)" &&
git prune-packed &&
test-tool chmtime --get -100 "$packdir/pack-$other.pack" >expect &&
cruft="$(git pack-objects --cruft --cruft-expiration="$expire" $packdir/pack <<-EOF
$keep
-pack-$other.pack
EOF
)" &&
test-tool pack-mtimes "pack-$cruft.mtimes" >actual.raw &&
cut -d" " -f2 <actual.raw | sort -u >actual &&
test_cmp expect actual
)
'
test_expect_success "unreachable cruft objects are repacked (expire $expire)" '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit packed &&
git repack -Ad &&
test_commit other &&
git rev-list --objects --no-object-names packed.. >objects &&
keep="$(basename "$(ls $packdir/pack-*.pack)")" &&
cruft_a="$(echo $keep | git pack-objects --cruft --cruft-expiration="$expire" $packdir/pack)" &&
git prune-packed &&
cruft_b="$(git pack-objects --cruft --cruft-expiration="$expire" $packdir/pack <<-EOF
$keep
-pack-$cruft_a.pack
EOF
)" &&
test-tool pack-mtimes "pack-$cruft_a.mtimes" >expect.raw &&
test-tool pack-mtimes "pack-$cruft_b.mtimes" >actual.raw &&
sort <expect.raw >expect &&
sort <actual.raw >actual &&
test_cmp expect actual
)
'
test_expect_success "multiple cruft packs (expire $expire)" '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit reachable &&
git repack -Ad &&
keep="$(basename "$(ls $packdir/pack-*.pack)")" &&
test_commit cruft &&
loose="$objdir/$(test_oid_to_path $(git rev-parse cruft))" &&
# generate three copies of the cruft object in different
# cruft packs, each with a unique mtime:
# - one expired (1000 seconds ago)
# - two non-expired (one 1000 seconds in the future,
# one 1500 seconds in the future)
test-tool chmtime =-1000 "$loose" &&
git pack-objects --cruft $packdir/pack-A <<-EOF &&
$keep
EOF
test-tool chmtime =+1000 "$loose" &&
git pack-objects --cruft $packdir/pack-B <<-EOF &&
$keep
-$(basename $(ls $packdir/pack-A-*.pack))
EOF
test-tool chmtime =+1500 "$loose" &&
git pack-objects --cruft $packdir/pack-C <<-EOF &&
$keep
-$(basename $(ls $packdir/pack-A-*.pack))
-$(basename $(ls $packdir/pack-B-*.pack))
EOF
# ensure the resulting cruft pack takes the most recent
# mtime among all copies
cruft="$(git pack-objects --cruft \
--cruft-expiration="$expire" \
$packdir/pack <<-EOF
$keep
-$(basename $(ls $packdir/pack-A-*.pack))
-$(basename $(ls $packdir/pack-B-*.pack))
-$(basename $(ls $packdir/pack-C-*.pack))
EOF
)" &&
test-tool pack-mtimes "$(basename $(ls $packdir/pack-C-*.mtimes))" >expect.raw &&
test-tool pack-mtimes "pack-$cruft.mtimes" >actual.raw &&
sort expect.raw >expect &&
sort actual.raw >actual &&
test_cmp expect actual
)
'
test_expect_success "cruft packs tolerate missing trees (expire $expire)" '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit reachable &&
test_commit cruft &&
tree="$(git rev-parse cruft^{tree})" &&
git reset --hard reachable &&
git tag -d cruft &&
git reflog expire --all --expire=all &&
# remove the unreachable tree, but leave the commit
# which has it as its root tree intact
rm -fr "$objdir/$(test_oid_to_path "$tree")" &&
git repack -Ad &&
basename $(ls $packdir/pack-*.pack) >in &&
git pack-objects --cruft --cruft-expiration="$expire" \
$packdir/pack <in
)
'
test_expect_success "cruft packs tolerate missing blobs (expire $expire)" '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit reachable &&
test_commit cruft &&
blob="$(git rev-parse cruft:cruft.t)" &&
git reset --hard reachable &&
git tag -d cruft &&
git reflog expire --all --expire=all &&
# remove the unreachable blob, but leave the commit (and
# the root tree of that commit) intact
rm -fr "$objdir/$(test_oid_to_path "$blob")" &&
git repack -Ad &&
basename $(ls $packdir/pack-*.pack) >in &&
git pack-objects --cruft --cruft-expiration="$expire" \
$packdir/pack <in
)
'
}
basic_cruft_pack_tests never
basic_cruft_pack_tests 2.weeks.ago
test_expect_success 'cruft tags rescue tagged objects' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit packed &&
git repack -Ad &&
test_commit tagged &&
git tag -a annotated -m tag &&
git rev-list --objects --no-object-names packed.. >objects &&
while read oid
do
test-tool chmtime -1000 \
"$objdir/$(test_oid_to_path $oid)"
done <objects &&
test-tool chmtime -500 \
"$objdir/$(test_oid_to_path $(git rev-parse annotated))" &&
keep="$(basename "$(ls $packdir/pack-*.pack)")" &&
cruft="$(echo $keep | git pack-objects --cruft \
--cruft-expiration=750.seconds.ago \
$packdir/pack)" &&
test-tool pack-mtimes "pack-$cruft.mtimes" >actual.raw &&
cut -f1 -d" " <actual.raw | sort >actual &&
(
cat objects &&
git rev-parse annotated
) >expect.raw &&
sort <expect.raw >expect &&
test_cmp expect actual &&
cat actual
)
'
test_expect_success 'cruft commits rescue parents, trees' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit packed &&
git repack -Ad &&
test_commit old &&
test_commit new &&
git rev-list --objects --no-object-names packed..new >objects &&
while read object
do
test-tool chmtime -1000 \
"$objdir/$(test_oid_to_path $object)"
done <objects &&
test-tool chmtime +500 "$objdir/$(test_oid_to_path \
$(git rev-parse HEAD))" &&
keep="$(basename "$(ls $packdir/pack-*.pack)")" &&
cruft="$(echo $keep | git pack-objects --cruft \
--cruft-expiration=750.seconds.ago \
$packdir/pack)" &&
test-tool pack-mtimes "pack-$cruft.mtimes" >actual.raw &&
cut -d" " -f1 <actual.raw | sort >actual &&
sort <objects >expect &&
test_cmp expect actual
)
'
test_expect_success 'cruft trees rescue sub-trees, blobs' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit packed &&
git repack -Ad &&
mkdir -p dir/sub &&
echo foo >foo &&
echo bar >dir/bar &&
echo baz >dir/sub/baz &&
test_tick &&
git add . &&
git commit -m "pruned" &&
test-tool chmtime -1000 "$objdir/$(test_oid_to_path $(git rev-parse HEAD))" &&
test-tool chmtime -1000 "$objdir/$(test_oid_to_path $(git rev-parse HEAD^{tree}))" &&
test-tool chmtime -1000 "$objdir/$(test_oid_to_path $(git rev-parse HEAD:foo))" &&
test-tool chmtime -500 "$objdir/$(test_oid_to_path $(git rev-parse HEAD:dir))" &&
test-tool chmtime -1000 "$objdir/$(test_oid_to_path $(git rev-parse HEAD:dir/bar))" &&
test-tool chmtime -1000 "$objdir/$(test_oid_to_path $(git rev-parse HEAD:dir/sub))" &&
test-tool chmtime -1000 "$objdir/$(test_oid_to_path $(git rev-parse HEAD:dir/sub/baz))" &&
keep="$(basename "$(ls $packdir/pack-*.pack)")" &&
cruft="$(echo $keep | git pack-objects --cruft \
--cruft-expiration=750.seconds.ago \
$packdir/pack)" &&
test-tool pack-mtimes "pack-$cruft.mtimes" >actual.raw &&
cut -f1 -d" " <actual.raw | sort >actual &&
git rev-parse HEAD:dir HEAD:dir/bar HEAD:dir/sub HEAD:dir/sub/baz >expect.raw &&
sort <expect.raw >expect &&
test_cmp expect actual
)
'
test_expect_success 'expired objects are pruned' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit packed &&
git repack -Ad &&
test_commit pruned &&
git rev-list --objects --no-object-names packed..pruned >objects &&
while read object
do
test-tool chmtime -1000 \
"$objdir/$(test_oid_to_path $object)"
done <objects &&
keep="$(basename "$(ls $packdir/pack-*.pack)")" &&
cruft="$(echo $keep | git pack-objects --cruft \
--cruft-expiration=750.seconds.ago \
$packdir/pack)" &&
test-tool pack-mtimes "pack-$cruft.mtimes" >actual &&
test_must_be_empty actual
)
'
test_expect_success 'repack --cruft generates a cruft pack' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit reachable &&
git branch -M main &&
git checkout --orphan other &&
test_commit unreachable &&
git checkout main &&
git branch -D other &&
git tag -d unreachable &&
# objects are not cruft if they are contained in the reflogs
git reflog expire --all --expire=all &&
git rev-list --objects --all --no-object-names >reachable.raw &&
git cat-file --batch-all-objects --batch-check="%(objectname)" >objects &&
sort <reachable.raw >reachable &&
comm -13 reachable objects >unreachable &&
git repack --cruft -d &&
cruft=$(basename $(ls $packdir/pack-*.mtimes) .mtimes) &&
pack=$(basename $(ls $packdir/pack-*.pack | grep -v $cruft) .pack) &&
git show-index <$packdir/$pack.idx >actual.raw &&
cut -f2 -d" " actual.raw | sort >actual &&
test_cmp reachable actual &&
git show-index <$packdir/$cruft.idx >actual.raw &&
cut -f2 -d" " actual.raw | sort >actual &&
test_cmp unreachable actual
)
'
test_expect_success 'loose objects mtimes upsert others' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit reachable &&
git repack -Ad &&
git branch -M main &&
git checkout --orphan other &&
test_commit cruft &&
# incremental repack, leaving existing objects loose (so
# they can be "freshened")
git repack &&
tip="$(git rev-parse cruft)" &&
path="$objdir/$(test_oid_to_path "$tip")" &&
test-tool chmtime --get +1000 "$path" >expect &&
git checkout main &&
git branch -D other &&
git tag -d cruft &&
git reflog expire --all --expire=all &&
git repack --cruft -d &&
mtimes="$(basename $(ls $packdir/pack-*.mtimes))" &&
test-tool pack-mtimes "$mtimes" >actual.raw &&
grep "$tip" actual.raw | cut -d" " -f2 >actual &&
test_cmp expect actual
)
'
test_expect_success 'expiring cruft objects with git gc' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit reachable &&
git branch -M main &&
git checkout --orphan other &&
test_commit unreachable &&
git checkout main &&
git branch -D other &&
git tag -d unreachable &&
# objects are not cruft if they are contained in the reflogs
git reflog expire --all --expire=all &&
git rev-list --objects --all --no-object-names >reachable.raw &&
git cat-file --batch-all-objects --batch-check="%(objectname)" >objects &&
sort <reachable.raw >reachable &&
comm -13 reachable objects >unreachable &&
# Write a cruft pack containing all unreachable objects.
git gc --cruft --prune="01-01-1980" &&
mtimes=$(ls .git/objects/pack/pack-*.mtimes) &&
test_path_is_file $mtimes &&
# Prune all unreachable objects from the cruft pack.
git gc --cruft --prune=now &&
git cat-file --batch-all-objects --batch-check="%(objectname)" >objects &&
comm -23 unreachable objects >removed &&
test_cmp unreachable removed &&
test_path_is_missing $mtimes
)
'
test_expect_success 'cruft packs are not included in geometric repack' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit reachable &&
git repack -Ad &&
git branch -M main &&
git checkout --orphan other &&
test_commit cruft &&
git repack -d &&
git checkout main &&
git branch -D other &&
git tag -d cruft &&
git reflog expire --all --expire=all &&
git repack --cruft &&
find $packdir -type f | sort >before &&
git repack --geometric=2 -d &&
find $packdir -type f | sort >after &&
test_cmp before after
)
'
test_expect_success 'repack --geometric collects once-cruft objects' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit reachable &&
git repack -Ad &&
git branch -M main &&
git checkout --orphan other &&
git rm -rf . &&
test_commit --no-tag cruft &&
cruft="$(git rev-parse HEAD)" &&
git checkout main &&
git branch -D other &&
git reflog expire --all --expire=all &&
# Pack the objects created in the previous step into a cruft
# pack. Intentionally leave loose copies of those objects
# around so we can pick them up in a subsequent --geometric
# reapack.
git repack --cruft &&
# Now make those objects reachable, and ensure that they are
# packed into the new pack created via a --geometric repack.
git update-ref refs/heads/other $cruft &&
# Without this object, the set of unpacked objects is exactly
# the set of objects already in the cruft pack. Tweak that set
# to ensure we do not overwrite the cruft pack entirely.
test_commit reachable2 &&
find $packdir -name "pack-*.idx" | sort >before &&
git repack --geometric=2 -d &&
find $packdir -name "pack-*.idx" | sort >after &&
{
git rev-list --objects --no-object-names $cruft &&
git rev-list --objects --no-object-names reachable..reachable2
} >want.raw &&
sort want.raw >want &&
pack=$(comm -13 before after) &&
git show-index <$pack >objects.raw &&
cut -d" " -f2 objects.raw | sort >got &&
test_cmp want got
)
'
test_expect_success 'cruft repack with no reachable objects' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit base &&
git repack -ad &&
base="$(git rev-parse base)" &&
git for-each-ref --format="delete %(refname)" >in &&
git update-ref --stdin <in &&
git reflog expire --all --expire=all &&
rm -fr .git/index &&
git repack --cruft -d &&
git cat-file -t $base
)
'
test_expect_success 'cruft repack ignores --max-pack-size' '
git init max-pack-size &&
(
cd max-pack-size &&
test_commit base &&
# two cruft objects which exceed the maximum pack size
test-tool genrandom foo 1048576 | git hash-object --stdin -w &&
test-tool genrandom bar 1048576 | git hash-object --stdin -w &&
git repack --cruft --max-pack-size=1M &&
find $packdir -name "*.mtimes" >cruft &&
test_line_count = 1 cruft &&
test-tool pack-mtimes "$(basename "$(cat cruft)")" >objects &&
test_line_count = 2 objects
)
'
test_expect_success 'cruft repack ignores pack.packSizeLimit' '
(
cd max-pack-size &&
# repack everything back together to remove the existing cruft
# pack (but to keep its objects)
git repack -adk &&
git -c pack.packSizeLimit=1M repack --cruft &&
# ensure the same post condition is met when --max-pack-size
# would otherwise be inferred from the configuration
find $packdir -name "*.mtimes" >cruft &&
test_line_count = 1 cruft &&
test-tool pack-mtimes "$(basename "$(cat cruft)")" >objects &&
test_line_count = 2 objects
)
'
test_expect_success 'cruft repack respects repack.cruftWindow' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit base &&
GIT_TRACE2_EVENT=$(pwd)/event.trace \
git -c pack.window=1 -c repack.cruftWindow=2 repack \
--cruft --window=3 &&
grep "pack-objects.*--window=2.*--cruft" event.trace
)
'
test_expect_success 'cruft repack respects --window by default' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit base &&
GIT_TRACE2_EVENT=$(pwd)/event.trace \
git -c pack.window=2 repack --cruft --window=3 &&
grep "pack-objects.*--window=3.*--cruft" event.trace
)
'
test_expect_success 'cruft repack respects --quiet' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit base &&
GIT_PROGRESS_DELAY=0 git repack --cruft --quiet 2>err &&
test_must_be_empty err
)
'
test_expect_success 'cruft --local drops unreachable objects' '
git init alternate &&
git init repo &&
test_when_finished "rm -fr alternate repo" &&
test_commit -C alternate base &&
# Pack all objects in alterate so that the cruft repack in "repo" sees
# the object it dropped due to `--local` as packed. Otherwise this
# object would not appear packed anywhere (since it is not packed in
# alternate and likewise not part of the cruft pack in the other repo
# because of `--local`).
git -C alternate repack -ad &&
(
cd repo &&
object="$(git -C ../alternate rev-parse HEAD:base.t)" &&
git -C ../alternate cat-file -p $object >contents &&
# Write some reachable objects and two unreachable ones: one
# that the alternate has and another that is unique.
test_commit other &&
git hash-object -w -t blob contents &&
cruft="$(echo cruft | git hash-object -w -t blob --stdin)" &&
( cd ../alternate/.git/objects && pwd ) \
>.git/objects/info/alternates &&
test_path_is_file $objdir/$(test_oid_to_path $cruft) &&
test_path_is_file $objdir/$(test_oid_to_path $object) &&
git repack -d --cruft --local &&
test-tool pack-mtimes "$(basename $(ls $packdir/pack-*.mtimes))" \
>objects &&
! grep $object objects &&
grep $cruft objects
)
'
test_expect_success 'MIDX bitmaps tolerate reachable cruft objects' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
test_commit reachable &&
test_commit cruft &&
unreachable="$(git rev-parse cruft)" &&
git reset --hard $unreachable^ &&
git tag -d cruft &&
git reflog expire --all --expire=all &&
git repack --cruft -d &&
# resurrect the unreachable object via a new commit. the
# new commit will get selected for a bitmap, but be
# missing one of its parents from the selected packs.
git reset --hard $unreachable &&
test_commit resurrect &&
git repack --write-midx --write-bitmap-index --geometric=2 -d
)
'
test_expect_success 'cruft objects are freshend via loose' '
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
echo "cruft" >contents &&
blob="$(git hash-object -w -t blob contents)" &&
loose="$objdir/$(test_oid_to_path $blob)" &&
test_commit base &&
git repack --cruft -d &&
test_path_is_missing "$loose" &&
test-tool pack-mtimes "$(basename "$(ls $packdir/pack-*.mtimes)")" >cruft &&
grep "$blob" cruft &&
# write the same object again
git hash-object -w -t blob contents &&
test_path_is_file "$loose"
)
'
test_done