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|
#!/bin/sh
#
# Copyright (c) 2022 Han Xin
#
test_description='git unpack-objects with large objects'
. ./test-lib.sh
prepare_dest () {
test_when_finished "rm -rf dest.git" &&
git init --bare dest.git &&
git -C dest.git config core.bigFileThreshold "$1"
}
test_expect_success "create large objects (1.5 MB) and PACK" '
test-tool genrandom foo 1500000 >big-blob &&
test_commit --append foo big-blob &&
test-tool genrandom bar 1500000 >big-blob &&
test_commit --append bar big-blob &&
PACK=$(echo HEAD | git pack-objects --revs pack) &&
git verify-pack -v pack-$PACK.pack >out &&
sed -n -e "s/^\([0-9a-f][0-9a-f]*\).*\(commit\|tree\|blob\).*/\1/p" \
<out >obj-list
'
test_expect_success 'set memory limitation to 1MB' '
GIT_ALLOC_LIMIT=1m &&
export GIT_ALLOC_LIMIT
'
test_expect_success 'unpack-objects failed under memory limitation' '
prepare_dest 2m &&
test_must_fail git -C dest.git unpack-objects <pack-$PACK.pack 2>err &&
grep "fatal: attempting to allocate" err
'
test_expect_success 'unpack-objects works with memory limitation in dry-run mode' '
prepare_dest 2m &&
git -C dest.git unpack-objects -n <pack-$PACK.pack &&
test_stdout_line_count = 0 find dest.git/objects -type f &&
test_dir_is_empty dest.git/objects/pack
'
test_expect_success 'unpack big object in stream' '
prepare_dest 1m &&
git -C dest.git unpack-objects <pack-$PACK.pack &&
test_dir_is_empty dest.git/objects/pack
'
check_fsync_events () {
local trace="$1" &&
shift &&
cat >expect &&
sed -n \
-e '/^{"event":"data",.*"category":"fsync",/ {
s/.*"category":"fsync",//;
s/}$//;
p;
}' \
<"$trace" >actual &&
test_cmp expect actual
}
BATCH_CONFIGURATION='-c core.fsync=loose-object -c core.fsyncmethod=batch'
test_expect_success 'unpack big object in stream (core.fsyncmethod=batch)' '
prepare_dest 1m &&
GIT_TRACE2_EVENT="$(pwd)/trace2.txt" \
GIT_TEST_FSYNC=true \
git -C dest.git $BATCH_CONFIGURATION unpack-objects <pack-$PACK.pack &&
if grep "core.fsyncMethod = batch is unsupported" trace2.txt
then
flush_count=7
else
flush_count=1
fi &&
check_fsync_events trace2.txt <<-EOF &&
"key":"fsync/writeout-only","value":"6"
"key":"fsync/hardware-flush","value":"$flush_count"
EOF
test_dir_is_empty dest.git/objects/pack &&
git -C dest.git cat-file --batch-check="%(objectname)" <obj-list >current &&
cmp obj-list current
'
test_expect_success 'do not unpack existing large objects' '
prepare_dest 1m &&
git -C dest.git index-pack --stdin <pack-$PACK.pack &&
git -C dest.git unpack-objects <pack-$PACK.pack &&
# The destination came up with the exact same pack...
DEST_PACK=$(echo dest.git/objects/pack/pack-*.pack) &&
cmp pack-$PACK.pack $DEST_PACK &&
# ...and wrote no loose objects
test_stdout_line_count = 0 find dest.git/objects -type f ! -name "pack-*"
'
test_done
|
