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76f14b777c
Teach Git to provide a way for users to enable/disable bitmap lookup table extension by providing a config option named 'writeBitmapLookupTable'. Default is false. Also add test to verify writting of lookup table. Mentored-by: Taylor Blau <me@ttaylorr.com> Co-Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com> Co-Authored-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Abhradeep Chakraborty <chakrabortyabhradeep79@gmail.com> Reviewed-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
370 lines
9.1 KiB
Bash
Executable File
370 lines
9.1 KiB
Bash
Executable File
#!/bin/sh
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test_description='exercise basic multi-pack bitmap functionality'
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. ./test-lib.sh
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. "${TEST_DIRECTORY}/lib-bitmap.sh"
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# We'll be writing our own midx and bitmaps, so avoid getting confused by the
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# automatic ones.
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GIT_TEST_MULTI_PACK_INDEX=0
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GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0
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# This test exercise multi-pack bitmap functionality where the object order is
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# stored and read from a special chunk within the MIDX, so use the default
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# behavior here.
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sane_unset GIT_TEST_MIDX_WRITE_REV
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sane_unset GIT_TEST_MIDX_READ_RIDX
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bitmap_reuse_tests() {
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from=$1
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to=$2
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writeLookupTable=false
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for i in $3-${$#}
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do
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case $i in
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"pack.writeBitmapLookupTable") writeLookupTable=true;;
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esac
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done
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test_expect_success "setup pack reuse tests ($from -> $to)" '
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rm -fr repo &&
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git init repo &&
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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test_commit_bulk 16 &&
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git tag old-tip &&
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git config core.multiPackIndex true &&
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if test "MIDX" = "$from"
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then
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git repack -Ad &&
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git multi-pack-index write --bitmap
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else
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git repack -Adb
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fi
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)
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'
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test_expect_success "build bitmap from existing ($from -> $to)" '
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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test_commit_bulk --id=further 16 &&
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git tag new-tip &&
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if test "MIDX" = "$to"
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then
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git repack -d &&
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git multi-pack-index write --bitmap
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else
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git repack -Adb
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fi
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)
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'
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test_expect_success "verify resulting bitmaps ($from -> $to)" '
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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git for-each-ref &&
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git rev-list --test-bitmap refs/tags/old-tip &&
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git rev-list --test-bitmap refs/tags/new-tip
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)
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'
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}
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test_midx_bitmap_cases () {
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writeLookupTable=false
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writeBitmapLookupTable=
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for i in "$@"
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do
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case $i in
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"pack.writeBitmapLookupTable")
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writeLookupTable=true
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writeBitmapLookupTable="$i"
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;;
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esac
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done
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test_expect_success 'setup test_repository' '
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rm -rf * .git &&
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git init &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"'
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'
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midx_bitmap_core
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bitmap_reuse_tests 'pack' 'MIDX' "$writeBitmapLookupTable"
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bitmap_reuse_tests 'MIDX' 'pack' "$writeBitmapLookupTable"
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bitmap_reuse_tests 'MIDX' 'MIDX' "$writeBitmapLookupTable"
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test_expect_success 'missing object closure fails gracefully' '
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rm -fr repo &&
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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test_commit loose &&
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test_commit packed &&
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# Do not pass "--revs"; we want a pack without the "loose"
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# commit.
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git pack-objects $objdir/pack/pack <<-EOF &&
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$(git rev-parse packed)
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EOF
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test_must_fail git multi-pack-index write --bitmap 2>err &&
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grep "doesn.t have full closure" err &&
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test_path_is_missing $midx
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)
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'
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midx_bitmap_partial_tests
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test_expect_success 'removing a MIDX clears stale bitmaps' '
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rm -fr repo &&
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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test_commit base &&
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git repack &&
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git multi-pack-index write --bitmap &&
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# Write a MIDX and bitmap; remove the MIDX but leave the bitmap.
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stale_bitmap=$midx-$(midx_checksum $objdir).bitmap &&
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rm $midx &&
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# Then write a new MIDX.
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test_commit new &&
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git repack &&
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git multi-pack-index write --bitmap &&
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test_path_is_file $midx &&
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test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
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test_path_is_missing $stale_bitmap
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)
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'
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test_expect_success 'pack.preferBitmapTips' '
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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test_commit_bulk --message="%s" 103 &&
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git log --format="%H" >commits.raw &&
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sort <commits.raw >commits &&
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git log --format="create refs/tags/%s %H" HEAD >refs &&
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git update-ref --stdin <refs &&
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git multi-pack-index write --bitmap &&
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test_path_is_file $midx &&
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test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
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test-tool bitmap list-commits | sort >bitmaps &&
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comm -13 bitmaps commits >before &&
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test_line_count = 1 before &&
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perl -ne "printf(\"create refs/tags/include/%d \", $.); print" \
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<before | git update-ref --stdin &&
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rm -fr $midx-$(midx_checksum $objdir).bitmap &&
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rm -fr $midx &&
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git -c pack.preferBitmapTips=refs/tags/include \
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multi-pack-index write --bitmap &&
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test-tool bitmap list-commits | sort >bitmaps &&
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comm -13 bitmaps commits >after &&
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! test_cmp before after
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)
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'
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test_expect_success 'writing a bitmap with --refs-snapshot' '
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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test_commit one &&
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test_commit two &&
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git rev-parse one >snapshot &&
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git repack -ad &&
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# First, write a MIDX which see both refs/tags/one and
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# refs/tags/two (causing both of those commits to receive
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# bitmaps).
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git multi-pack-index write --bitmap &&
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test_path_is_file $midx &&
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test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
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test-tool bitmap list-commits | sort >bitmaps &&
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grep "$(git rev-parse one)" bitmaps &&
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grep "$(git rev-parse two)" bitmaps &&
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rm -fr $midx-$(midx_checksum $objdir).bitmap &&
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rm -fr $midx &&
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# Then again, but with a refs snapshot which only sees
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# refs/tags/one.
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git multi-pack-index write --bitmap --refs-snapshot=snapshot &&
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test_path_is_file $midx &&
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test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
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test-tool bitmap list-commits | sort >bitmaps &&
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grep "$(git rev-parse one)" bitmaps &&
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! grep "$(git rev-parse two)" bitmaps
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)
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'
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test_expect_success 'write a bitmap with --refs-snapshot (preferred tips)' '
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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test_commit_bulk --message="%s" 103 &&
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git log --format="%H" >commits.raw &&
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sort <commits.raw >commits &&
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git log --format="create refs/tags/%s %H" HEAD >refs &&
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git update-ref --stdin <refs &&
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git multi-pack-index write --bitmap &&
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test_path_is_file $midx &&
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test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
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test-tool bitmap list-commits | sort >bitmaps &&
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comm -13 bitmaps commits >before &&
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test_line_count = 1 before &&
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(
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grep -vf before commits.raw &&
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# mark missing commits as preferred
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sed "s/^/+/" before
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) >snapshot &&
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rm -fr $midx-$(midx_checksum $objdir).bitmap &&
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rm -fr $midx &&
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git multi-pack-index write --bitmap --refs-snapshot=snapshot &&
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test-tool bitmap list-commits | sort >bitmaps &&
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comm -13 bitmaps commits >after &&
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! test_cmp before after
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)
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'
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test_expect_success 'hash-cache values are propagated from pack bitmaps' '
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rm -fr repo &&
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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test_commit base &&
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test_commit base2 &&
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git repack -adb &&
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test-tool bitmap dump-hashes >pack.raw &&
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test_file_not_empty pack.raw &&
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sort pack.raw >pack.hashes &&
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test_commit new &&
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git repack &&
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git multi-pack-index write --bitmap &&
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test-tool bitmap dump-hashes >midx.raw &&
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sort midx.raw >midx.hashes &&
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# ensure that every namehash in the pack bitmap can be found in
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# the midx bitmap (i.e., that there are no oid-namehash pairs
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# unique to the pack bitmap).
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comm -23 pack.hashes midx.hashes >dropped.hashes &&
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test_must_be_empty dropped.hashes
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)
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'
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test_expect_success 'no .bitmap is written without any objects' '
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rm -fr repo &&
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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empty="$(git pack-objects $objdir/pack/pack </dev/null)" &&
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cat >packs <<-EOF &&
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pack-$empty.idx
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EOF
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git multi-pack-index write --bitmap --stdin-packs \
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<packs 2>err &&
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grep "bitmap without any objects" err &&
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test_path_is_file $midx &&
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test_path_is_missing $midx-$(midx_checksum $objdir).bitmap
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)
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'
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test_expect_success 'graceful fallback when missing reverse index' '
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rm -fr repo &&
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
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test_commit base &&
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# write a pack and MIDX bitmap containing base
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git repack -adb &&
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git multi-pack-index write --bitmap &&
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GIT_TEST_MIDX_READ_RIDX=0 \
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git rev-list --use-bitmap-index HEAD 2>err &&
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! grep "ignoring extra bitmap file" err
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)
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'
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}
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test_midx_bitmap_cases
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test_midx_bitmap_cases "pack.writeBitmapLookupTable"
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test_expect_success 'multi-pack-index write writes lookup table if enabled' '
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rm -fr repo &&
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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test_commit base &&
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git config pack.writeBitmapLookupTable true &&
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git repack -ad &&
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GIT_TRACE2_EVENT="$(pwd)/trace" \
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git multi-pack-index write --bitmap &&
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grep "\"label\":\"writing_lookup_table\"" trace
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)
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'
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test_done
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