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0b69bb0fb1
"git repack" has been taught to generate multi-pack reachability bitmaps. * tb/repack-write-midx: test-read-midx: fix leak of bitmap_index struct builtin/repack.c: pass `--refs-snapshot` when writing bitmaps builtin/repack.c: make largest pack preferred builtin/repack.c: support writing a MIDX while repacking builtin/repack.c: extract showing progress to a variable builtin/repack.c: rename variables that deal with non-kept packs builtin/repack.c: keep track of existing packs unconditionally midx: preliminary support for `--refs-snapshot` builtin/multi-pack-index.c: support `--stdin-packs` mode midx: expose `write_midx_file_only()` publicly
398 lines
9.7 KiB
Bash
Executable file
398 lines
9.7 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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. "${TEST_DIRECTORY}/lib-bitmap.sh"
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# We'll be writing our own midx and bitmaps, so avoid getting confused by the
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# automatic ones.
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GIT_TEST_MULTI_PACK_INDEX=0
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GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0
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objdir=.git/objects
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midx=$objdir/pack/multi-pack-index
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# midx_pack_source <obj>
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midx_pack_source () {
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test-tool read-midx --show-objects .git/objects | grep "^$1 " | cut -f2
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}
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setup_bitmap_history
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test_expect_success 'enable core.multiPackIndex' '
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git config core.multiPackIndex true
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'
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test_expect_success 'create single-pack midx with bitmaps' '
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git repack -ad &&
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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_file $midx-$(midx_checksum $objdir).rev
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'
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basic_bitmap_tests
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test_expect_success 'create new additional packs' '
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for i in $(test_seq 1 16)
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do
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test_commit "$i" &&
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git repack -d || return 1
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done &&
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git checkout -b other2 HEAD~8 &&
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for i in $(test_seq 1 8)
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do
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test_commit "side-$i" &&
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git repack -d || return 1
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done &&
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git checkout second
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'
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test_expect_success 'create multi-pack midx with bitmaps' '
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git multi-pack-index write --bitmap &&
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ls $objdir/pack/pack-*.pack >packs &&
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test_line_count = 25 packs &&
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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_file $midx-$(midx_checksum $objdir).rev
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'
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basic_bitmap_tests
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test_expect_success '--no-bitmap is respected when bitmaps exist' '
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git multi-pack-index write --bitmap &&
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test_commit respect--no-bitmap &&
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git repack -d &&
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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_file $midx-$(midx_checksum $objdir).rev &&
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git multi-pack-index write --no-bitmap &&
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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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test_path_is_missing $midx-$(midx_checksum $objdir).rev
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'
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test_expect_success 'setup midx with base from later pack' '
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# Write a and b so that "a" is a delta on top of base "b", since Git
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# prefers to delete contents out of a base rather than add to a shorter
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# object.
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test_seq 1 128 >a &&
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test_seq 1 130 >b &&
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git add a b &&
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git commit -m "initial commit" &&
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a=$(git rev-parse HEAD:a) &&
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b=$(git rev-parse HEAD:b) &&
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# In the first pack, "a" is stored as a delta to "b".
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p1=$(git pack-objects .git/objects/pack/pack <<-EOF
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$a
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$b
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EOF
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) &&
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# In the second pack, "a" is missing, and "b" is not a delta nor base to
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# any other object.
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p2=$(git pack-objects .git/objects/pack/pack <<-EOF
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$b
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$(git rev-parse HEAD)
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$(git rev-parse HEAD^{tree})
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EOF
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) &&
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git prune-packed &&
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# Use the second pack as the preferred source, so that "b" occurs
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# earlier in the MIDX object order, rendering "a" unusable for pack
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# reuse.
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git multi-pack-index write --bitmap --preferred-pack=pack-$p2.idx &&
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have_delta $a $b &&
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test $(midx_pack_source $a) != $(midx_pack_source $b)
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'
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rev_list_tests 'full bitmap with backwards delta'
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test_expect_success 'clone with bitmaps enabled' '
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git clone --no-local --bare . clone-reverse-delta.git &&
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test_when_finished "rm -fr clone-reverse-delta.git" &&
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git rev-parse HEAD >expect &&
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git --git-dir=clone-reverse-delta.git rev-parse HEAD >actual &&
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test_cmp expect actual
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'
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bitmap_reuse_tests() {
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from=$1
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to=$2
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test_expect_success "setup pack reuse tests ($from -> $to)" '
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rm -fr repo &&
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git init repo &&
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(
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cd repo &&
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test_commit_bulk 16 &&
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git tag old-tip &&
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git config core.multiPackIndex true &&
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if test "MIDX" = "$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 -> $to)" '
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(
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cd repo &&
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test_commit_bulk --id=further 16 &&
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git tag new-tip &&
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if test "MIDX" = "$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 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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bitmap_reuse_tests 'pack' 'MIDX'
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bitmap_reuse_tests 'MIDX' 'pack'
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bitmap_reuse_tests 'MIDX' 'MIDX'
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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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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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test_expect_success 'setup partial bitmaps' '
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test_commit packed &&
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git repack &&
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test_commit loose &&
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git multi-pack-index write --bitmap 2>err &&
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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_file $midx-$(midx_checksum $objdir).rev
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'
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basic_bitmap_tests HEAD~
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test_expect_success 'removing a MIDX clears stale bitmaps' '
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rm -fr repo &&
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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test_commit base &&
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git repack &&
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git multi-pack-index write --bitmap &&
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# Write a MIDX and bitmap; remove the MIDX but leave the bitmap.
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stale_bitmap=$midx-$(midx_checksum $objdir).bitmap &&
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stale_rev=$midx-$(midx_checksum $objdir).rev &&
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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_file $midx-$(midx_checksum $objdir).rev &&
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test_path_is_missing $stale_bitmap &&
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test_path_is_missing $stale_rev
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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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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_path_is_file $midx-$(midx_checksum $objdir).rev &&
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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 $midx-$(midx_checksum $objdir).rev &&
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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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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 $midx-$(midx_checksum $objdir).rev &&
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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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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 $midx-$(midx_checksum $objdir).rev &&
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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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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_done
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