#!/bin/sh # # Copyright (c) 2022 Han Xin # test_description='git unpack-objects with large objects' TEST_PASSES_SANITIZE_LEAK=true . ./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="$1" && shift && cat >expect && sed -n \ -e '/^{"event":"counter",.*"category":"fsync",/ { s/.*"category":"fsync",//; s/}$//; 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 && "name":"writeout-only","count":6 "name":"hardware-flush","count":$flush_count EOF test_dir_is_empty dest.git/objects/pack && git -C dest.git cat-file --batch-check="%(objectname)" <obj-list >current && cmp obj-list current ' test_expect_success 'do not unpack existing large objects' ' prepare_dest 1m && git -C dest.git index-pack --stdin <pack-$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