diff options
Diffstat (limited to 't/t7704-repack-cruft.sh')
| -rwxr-xr-x | t/t7704-repack-cruft.sh | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/t/t7704-repack-cruft.sh b/t/t7704-repack-cruft.sh new file mode 100755 index 0000000..be3735d --- /dev/null +++ b/t/t7704-repack-cruft.sh @@ -0,0 +1,414 @@ +#!/bin/sh + +test_description='git repack works correctly' + +. ./test-lib.sh + +objdir=.git/objects +packdir=$objdir/pack + +test_expect_success '--expire-to stores pruned objects (now)' ' + git init expire-to-now && + ( + cd expire-to-now && + + git branch -M main && + + test_commit base && + + git checkout -b cruft && + test_commit --no-tag cruft && + + git rev-list --objects --no-object-names main..cruft >moved.raw && + sort moved.raw >moved.want && + + git rev-list --all --objects --no-object-names >expect.raw && + sort expect.raw >expect && + + git checkout main && + git branch -D cruft && + git reflog expire --all --expire=all && + + git init --bare expired.git && + git repack -d \ + --cruft --cruft-expiration="now" \ + --expire-to="expired.git/objects/pack/pack" && + + expired="$(ls expired.git/objects/pack/pack-*.idx)" && + test_path_is_file "${expired%.idx}.mtimes" && + + # Since the `--cruft-expiration` is "now", the effective + # behavior is to move _all_ unreachable objects out to + # the location in `--expire-to`. + git show-index <$expired >expired.raw && + cut -d" " -f2 expired.raw | sort >expired.objects && + git rev-list --all --objects --no-object-names \ + >remaining.objects && + + # ...in other words, the combined contents of this + # repository and expired.git should be the same as the + # set of objects we started with. + cat expired.objects remaining.objects | sort >actual && + test_cmp expect actual && + + # The "moved" objects (i.e., those in expired.git) + # should be the same as the cruft objects which were + # expired in the previous step. + test_cmp moved.want expired.objects + ) +' + +test_expect_success '--expire-to stores pruned objects (5.minutes.ago)' ' + git init expire-to-5.minutes.ago && + ( + cd expire-to-5.minutes.ago && + + git branch -M main && + + test_commit base && + + # Create two classes of unreachable objects, one which + # is older than 5 minutes (stale), and another which is + # newer (recent). + for kind in stale recent + do + git checkout -b $kind main && + test_commit --no-tag $kind || return 1 + done && + + git rev-list --objects --no-object-names main..stale >in && + stale="$(git pack-objects $objdir/pack/pack <in)" && + mtime="$(test-tool chmtime --get =-600 $objdir/pack/pack-$stale.pack)" && + + # expect holds the set of objects we expect to find in + # this repository after repacking + git rev-list --objects --no-object-names recent >expect.raw && + sort expect.raw >expect && + + # moved.want holds the set of objects we expect to find + # in expired.git + git rev-list --objects --no-object-names main..stale >out && + sort out >moved.want && + + git checkout main && + git branch -D stale recent && + git reflog expire --all --expire=all && + git prune-packed && + + git init --bare expired.git && + git repack -d \ + --cruft --cruft-expiration=5.minutes.ago \ + --expire-to="expired.git/objects/pack/pack" && + + # Some of the remaining objects in this repository are + # unreachable, so use `cat-file --batch-all-objects` + # instead of `rev-list` to get their names + git cat-file --batch-all-objects --batch-check="%(objectname)" \ + >remaining.objects && + sort remaining.objects >actual && + test_cmp expect actual && + + ( + cd expired.git && + + expired="$(ls objects/pack/pack-*.mtimes)" && + test-tool pack-mtimes $(basename $expired) >out && + cut -d" " -f1 out | sort >../moved.got && + + # Ensure that there are as many objects with the + # expected mtime as were moved to expired.git. + # + # In other words, ensure that the recorded + # mtimes of any moved objects was written + # correctly. + grep " $mtime$" out >matching && + test_line_count = $(wc -l <../moved.want) matching + ) && + test_cmp moved.want moved.got + ) +' + +generate_random_blob() { + test-tool genrandom "$@" >blob && + git hash-object -w -t blob blob && + rm blob +} + +pack_random_blob () { + generate_random_blob "$@" && + git repack -d -q >/dev/null +} + +generate_cruft_pack () { + pack_random_blob "$@" >/dev/null && + + ls $packdir/pack-*.pack | xargs -n 1 basename >in && + pack="$(git pack-objects --cruft $packdir/pack <in)" && + git prune-packed && + + echo "$packdir/pack-$pack.mtimes" +} + +test_expect_success '--max-cruft-size creates new packs when above threshold' ' + git init max-cruft-size-large && + ( + cd max-cruft-size-large && + test_commit base && + + foo="$(pack_random_blob foo $((1*1024*1024)))" && + git repack --cruft -d && + cruft_foo="$(ls $packdir/pack-*.mtimes)" && + + bar="$(pack_random_blob bar $((1*1024*1024)))" && + git repack --cruft -d --max-cruft-size=1M && + cruft_bar="$(ls $packdir/pack-*.mtimes | grep -v $cruft_foo)" && + + test-tool pack-mtimes $(basename "$cruft_foo") >foo.objects && + test-tool pack-mtimes $(basename "$cruft_bar") >bar.objects && + + grep "^$foo" foo.objects && + test_line_count = 1 foo.objects && + grep "^$bar" bar.objects && + test_line_count = 1 bar.objects + ) +' + +test_expect_success '--max-cruft-size combines existing packs when below threshold' ' + git init max-cruft-size-small && + ( + cd max-cruft-size-small && + test_commit base && + + foo="$(pack_random_blob foo $((1*1024*1024)))" && + git repack --cruft -d && + + bar="$(pack_random_blob bar $((1*1024*1024)))" && + git repack --cruft -d --max-cruft-size=10M && + + cruft=$(ls $packdir/pack-*.mtimes) && + test-tool pack-mtimes $(basename "$cruft") >cruft.objects && + + grep "^$foo" cruft.objects && + grep "^$bar" cruft.objects && + test_line_count = 2 cruft.objects + ) +' + +test_expect_success '--max-cruft-size combines smaller packs first' ' + git init max-cruft-size-consume-small && + ( + cd max-cruft-size-consume-small && + + test_commit base && + git repack -ad && + + cruft_foo="$(generate_cruft_pack foo 524288)" && # 0.5 MiB + cruft_bar="$(generate_cruft_pack bar 524288)" && # 0.5 MiB + cruft_baz="$(generate_cruft_pack baz 1048576)" && # 1.0 MiB + cruft_quux="$(generate_cruft_pack quux 1572864)" && # 1.5 MiB + + test-tool pack-mtimes "$(basename $cruft_foo)" >expect.raw && + test-tool pack-mtimes "$(basename $cruft_bar)" >>expect.raw && + sort expect.raw >expect.objects && + + # repacking with `--max-cruft-size=2M` should combine + # both 0.5 MiB packs together, instead of, say, one of + # the 0.5 MiB packs with the 1.0 MiB pack + ls $packdir/pack-*.mtimes | sort >cruft.before && + git repack -d --cruft --max-cruft-size=2M && + ls $packdir/pack-*.mtimes | sort >cruft.after && + + comm -13 cruft.before cruft.after >cruft.new && + comm -23 cruft.before cruft.after >cruft.removed && + + test_line_count = 1 cruft.new && + test_line_count = 2 cruft.removed && + + # the two smaller packs should be rolled up first + printf "%s\n" $cruft_foo $cruft_bar | sort >expect.removed && + test_cmp expect.removed cruft.removed && + + # ...and contain the set of objects rolled up + test-tool pack-mtimes "$(basename $(cat cruft.new))" >actual.raw && + sort actual.raw >actual.objects && + + test_cmp expect.objects actual.objects + ) +' + +test_expect_success 'setup --max-cruft-size with freshened objects' ' + git init max-cruft-size-freshen && + ( + cd max-cruft-size-freshen && + + test_commit base && + git repack -ad && + + foo="$(generate_random_blob foo 64)" && + test-tool chmtime --get -10000 \ + "$objdir/$(test_oid_to_path "$foo")" >foo.mtime && + + git repack --cruft -d && + + cruft="$(ls $packdir/pack-*.mtimes)" && + test-tool pack-mtimes "$(basename $cruft)" >actual && + echo "$foo $(cat foo.mtime)" >expect && + test_cmp expect actual + ) +' + +test_expect_success '--max-cruft-size with freshened objects (loose)' ' + ( + cd max-cruft-size-freshen && + + # regenerate the object, setting its mtime to be more recent + foo="$(generate_random_blob foo 64)" && + test-tool chmtime --get -100 \ + "$objdir/$(test_oid_to_path "$foo")" >foo.mtime && + + git repack --cruft -d && + + cruft="$(ls $packdir/pack-*.mtimes)" && + test-tool pack-mtimes "$(basename $cruft)" >actual && + echo "$foo $(cat foo.mtime)" >expect && + test_cmp expect actual + ) +' + +test_expect_success '--max-cruft-size with freshened objects (packed)' ' + ( + cd max-cruft-size-freshen && + + # regenerate the object and store it in a packfile, + # setting its mtime to be more recent + # + # store it alongside another cruft object so that we + # do not create an identical copy of the existing + # cruft pack (which contains $foo). + foo="$(generate_random_blob foo 64)" && + bar="$(generate_random_blob bar 64)" && + foo_pack="$(printf "%s\n" $foo $bar | git pack-objects $packdir/pack)" && + git prune-packed && + + test-tool chmtime --get -10 \ + "$packdir/pack-$foo_pack.pack" >foo.mtime && + + git repack --cruft -d && + + cruft="$(ls $packdir/pack-*.mtimes)" && + test-tool pack-mtimes "$(basename $cruft)" >actual && + echo "$foo $(cat foo.mtime)" >expect.raw && + echo "$bar $(cat foo.mtime)" >>expect.raw && + sort expect.raw >expect && + test_cmp expect actual + ) +' + +test_expect_success '--max-cruft-size with pruning' ' + git init max-cruft-size-prune && + ( + cd max-cruft-size-prune && + + test_commit base && + foo="$(generate_random_blob foo $((1024*1024)))" && + bar="$(generate_random_blob bar $((1024*1024)))" && + baz="$(generate_random_blob baz $((1024*1024)))" && + + test-tool chmtime -10000 "$objdir/$(test_oid_to_path "$foo")" && + + git repack -d --cruft --max-cruft-size=1M && + + # backdate the mtimes of all cruft packs to validate + # that they were rewritten as a result of pruning + ls $packdir/pack-*.mtimes | sort >cruft.before && + for cruft in $(cat cruft.before) + do + mtime="$(test-tool chmtime --get -10000 "$cruft")" && + echo $cruft $mtime >>mtimes || return 1 + done && + + # repack (and prune) with a --max-cruft-size to ensure + # that we appropriately split the resulting set of packs + git repack -d --cruft --max-cruft-size=1M \ + --cruft-expiration=10.seconds.ago && + ls $packdir/pack-*.mtimes | sort >cruft.after && + + for cruft in $(cat cruft.after) + do + old_mtime="$(grep $cruft mtimes | cut -d" " -f2)" && + new_mtime="$(test-tool chmtime --get $cruft)" && + test $old_mtime -lt $new_mtime || return 1 + done && + + test_line_count = 3 cruft.before && + test_line_count = 2 cruft.after && + test_must_fail git cat-file -e $foo && + git cat-file -e $bar && + git cat-file -e $baz + ) +' + +test_expect_success '--max-cruft-size ignores non-local packs' ' + repo="max-cruft-size-non-local" && + git init $repo && + ( + cd $repo && + test_commit base && + generate_random_blob foo 64 && + git repack --cruft -d + ) && + + git clone --reference=$repo $repo $repo-alt && + ( + cd $repo-alt && + + test_commit other && + generate_random_blob bar 64 && + + # ensure that we do not attempt to pick up packs from + # the non-alternated repository, which would result in a + # crash + git repack --cruft --max-cruft-size=1M -d + ) +' + +test_expect_success 'reachable packs are preferred over cruft ones' ' + repo="cruft-preferred-packs" && + git init "$repo" && + ( + cd "$repo" && + + # This test needs to exercise careful control over when a MIDX + # is and is not written. Unset the corresponding TEST variable + # accordingly. + sane_unset GIT_TEST_MULTI_PACK_INDEX && + + test_commit base && + test_commit --no-tag cruft && + + non_cruft="$(echo base | git pack-objects --revs $packdir/pack)" && + # Write a cruft pack which both (a) sorts ahead of the non-cruft + # pack in lexical order, and (b) has an older mtime to appease + # the MIDX preferred pack selection routine. + cruft="$(echo pack-$non_cruft.pack | git pack-objects --cruft $packdir/pack-A)" && + test-tool chmtime -1000 $packdir/pack-A-$cruft.pack && + + test_commit other && + git repack -d && + + git repack --geometric 2 -d --write-midx --write-bitmap-index && + + # After repacking, there are two packs left: one reachable one + # (which is the result of combining both of the existing two + # non-cruft packs), and one cruft pack. + find .git/objects/pack -type f -name "*.pack" >packs && + test_line_count = 2 packs && + + # Make sure that the pack we just wrote is marked as preferred, + # not the cruft one. + pack="$(test-tool read-midx --preferred-pack $objdir)" && + test_path_is_missing "$packdir/$(basename "$pack" ".idx").mtimes" + ) +' + +test_done |