452 lines
13 KiB
Bash
452 lines
13 KiB
Bash
# Helpers for scripts testing bitmap functionality; see t5310 for
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# example usage.
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objdir=.git/objects
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midx=$objdir/pack/multi-pack-index
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# Compare a file containing rev-list bitmap traversal output to its non-bitmap
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# counterpart. You can't just use test_cmp for this, because the two produce
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# subtly different output:
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#
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# - regular output is in traversal order, whereas bitmap is split by type,
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# with non-packed objects at the end
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#
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# - regular output has a space and the pathname appended to non-commit
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# objects; bitmap output omits this
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#
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# This function normalizes and compares the two. The second file should
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# always be the bitmap output.
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test_bitmap_traversal () {
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if test "$1" = "--no-confirm-bitmaps"
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then
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shift
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elif cmp "$1" "$2"
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then
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echo >&2 "identical raw outputs; are you sure bitmaps were used?"
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return 1
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fi &&
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cut -d' ' -f1 "$1" | sort >"$1.normalized" &&
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sort "$2" >"$2.normalized" &&
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test_cmp "$1.normalized" "$2.normalized" &&
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rm -f "$1.normalized" "$2.normalized"
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}
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# To ensure the logic for "maximal commits" is exercised, make
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# the repository a bit more complicated.
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#
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# other second
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# * *
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# (99 commits) (99 commits)
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# * *
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# |\ /|
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# | * octo-other octo-second * |
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# |/|\_________ ____________/|\|
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# | \ \/ __________/ |
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# | | ________/\ / |
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# * |/ * merge-right *
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# | _|__________/ \____________ |
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# |/ | \|
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# (l1) * * merge-left * (r1)
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# | / \________________________ |
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# |/ \|
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# (l2) * * (r2)
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# \___________________________ |
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# \|
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# * (base)
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#
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# We only push bits down the first-parent history, which
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# makes some of these commits unimportant!
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#
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# The important part for the maximal commit algorithm is how
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# the bitmasks are extended. Assuming starting bit positions
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# for second (bit 0) and other (bit 1), the bitmasks at the
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# end should be:
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#
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# second: 1 (maximal, selected)
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# other: 01 (maximal, selected)
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# (base): 11 (maximal)
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#
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# This complicated history was important for a previous
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# version of the walk that guarantees never walking a
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# commit multiple times. That goal might be important
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# again, so preserve this complicated case. For now, this
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# test will guarantee that the bitmaps are computed
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# correctly, even with the repeat calculations.
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setup_bitmap_history() {
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test_expect_success 'setup repo with moderate-sized history' '
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test_commit_bulk --id=file 10 &&
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git branch -M second &&
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git checkout -b other HEAD~5 &&
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test_commit_bulk --id=side 10 &&
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# add complicated history setup, including merges and
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# ambiguous merge-bases
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git checkout -b merge-left other~2 &&
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git merge second~2 -m "merge-left" &&
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git checkout -b merge-right second~1 &&
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git merge other~1 -m "merge-right" &&
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git checkout -b octo-second second &&
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git merge merge-left merge-right -m "octopus-second" &&
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git checkout -b octo-other other &&
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git merge merge-left merge-right -m "octopus-other" &&
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git checkout other &&
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git merge octo-other -m "pull octopus" &&
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git checkout second &&
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git merge octo-second -m "pull octopus" &&
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# Remove these branches so they are not selected
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# as bitmap tips
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git branch -D merge-left &&
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git branch -D merge-right &&
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git branch -D octo-other &&
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git branch -D octo-second &&
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# add padding to make these merges less interesting
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# and avoid having them selected for bitmaps
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test_commit_bulk --id=file 100 &&
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git checkout other &&
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test_commit_bulk --id=side 100 &&
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git checkout second &&
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bitmaptip=$(git rev-parse second) &&
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blob=$(echo tagged-blob | git hash-object -w --stdin) &&
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git tag tagged-blob $blob
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'
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}
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rev_list_tests_head () {
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test_expect_success "counting commits via bitmap ($state, $branch)" '
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git rev-list --count $branch >expect &&
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git rev-list --use-bitmap-index --count $branch >actual &&
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test_cmp expect actual
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'
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test_expect_success "counting partial commits via bitmap ($state, $branch)" '
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git rev-list --count $branch~5..$branch >expect &&
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git rev-list --use-bitmap-index --count $branch~5..$branch >actual &&
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test_cmp expect actual
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'
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test_expect_success "counting commits with limit ($state, $branch)" '
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git rev-list --count -n 1 $branch >expect &&
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git rev-list --use-bitmap-index --count -n 1 $branch >actual &&
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test_cmp expect actual
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'
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test_expect_success "counting non-linear history ($state, $branch)" '
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git rev-list --count other...second >expect &&
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git rev-list --use-bitmap-index --count other...second >actual &&
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test_cmp expect actual
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'
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test_expect_success "counting commits with limiting ($state, $branch)" '
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git rev-list --count $branch -- 1.t >expect &&
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git rev-list --use-bitmap-index --count $branch -- 1.t >actual &&
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test_cmp expect actual
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'
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test_expect_success "counting objects via bitmap ($state, $branch)" '
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git rev-list --count --objects $branch >expect &&
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git rev-list --use-bitmap-index --count --objects $branch >actual &&
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test_cmp expect actual
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'
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test_expect_success "enumerate commits ($state, $branch)" '
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git rev-list --use-bitmap-index $branch >actual &&
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git rev-list $branch >expect &&
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test_bitmap_traversal --no-confirm-bitmaps expect actual
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'
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test_expect_success "enumerate --objects ($state, $branch)" '
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git rev-list --objects --use-bitmap-index $branch >actual &&
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git rev-list --objects $branch >expect &&
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test_bitmap_traversal expect actual
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'
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test_expect_success "bitmap --objects handles non-commit objects ($state, $branch)" '
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git rev-list --objects --use-bitmap-index $branch tagged-blob >actual &&
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grep $blob actual
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'
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}
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rev_list_tests () {
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state=$1
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for branch in "second" "other"
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do
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rev_list_tests_head
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done
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}
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basic_bitmap_tests () {
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tip="$1"
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test_expect_success 'rev-list --test-bitmap verifies bitmaps' "
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git rev-list --test-bitmap "${tip:-HEAD}"
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"
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rev_list_tests 'full bitmap'
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test_expect_success 'clone from bitmapped repository' '
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rm -fr clone.git &&
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git clone --no-local --bare . clone.git &&
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git rev-parse HEAD >expect &&
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git --git-dir=clone.git rev-parse HEAD >actual &&
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test_cmp expect actual
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'
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test_expect_success 'partial clone from bitmapped repository' '
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test_config uploadpack.allowfilter true &&
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rm -fr partial-clone.git &&
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git clone --no-local --bare --filter=blob:none . partial-clone.git &&
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(
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cd partial-clone.git &&
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pack=$(echo objects/pack/*.pack) &&
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git verify-pack -v "$pack" >have &&
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awk "/blob/ { print \$1 }" <have >blobs &&
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# we expect this single blob because of the direct ref
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git rev-parse refs/tags/tagged-blob >expect &&
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test_cmp expect blobs
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)
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'
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test_expect_success 'setup further non-bitmapped commits' '
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test_commit_bulk --id=further 10
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'
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rev_list_tests 'partial bitmap'
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test_expect_success 'fetch (partial bitmap)' '
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git --git-dir=clone.git fetch origin second:second &&
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git rev-parse HEAD >expect &&
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git --git-dir=clone.git rev-parse HEAD >actual &&
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test_cmp expect actual
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'
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test_expect_success 'enumerating progress counts pack-reused objects' '
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count=$(git rev-list --objects --all --count) &&
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git repack -adb &&
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# check first with only reused objects; confirm that our
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# progress showed the right number, and also that we did
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# pack-reuse as expected. Check only the final "done"
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# line of the meter (there may be an arbitrary number of
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# intermediate lines ending with CR).
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GIT_PROGRESS_DELAY=0 \
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git pack-objects --all --stdout --progress \
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</dev/null >/dev/null 2>stderr &&
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grep "Enumerating objects: $count, done" stderr &&
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grep "pack-reused $count" stderr &&
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# now the same but with one non-reused object
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git commit --allow-empty -m "an extra commit object" &&
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GIT_PROGRESS_DELAY=0 \
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git pack-objects --all --stdout --progress \
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</dev/null >/dev/null 2>stderr &&
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grep "Enumerating objects: $((count+1)), done" stderr &&
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grep "pack-reused $count" stderr
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'
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}
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# have_delta <obj> <expected_base>
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#
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# Note that because this relies on cat-file, it might find _any_ copy of an
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# object in the repository. The caller is responsible for making sure
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# there's only one (e.g., via "repack -ad", or having just fetched a copy).
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have_delta () {
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echo $2 >expect &&
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echo $1 | git cat-file --batch-check="%(deltabase)" >actual &&
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test_cmp expect actual
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}
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midx_checksum () {
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test-tool read-midx --checksum "$1"
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}
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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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test_rev_exists () {
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commit="$1"
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kind="$2"
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test_expect_success "reverse index exists ($kind)" '
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GIT_TRACE2_EVENT=$(pwd)/event.trace \
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git rev-list --test-bitmap "$commit" &&
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if test "rev" = "$kind"
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then
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test_path_is_file $midx-$(midx_checksum $objdir).rev
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fi &&
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grep "\"category\":\"load_midx_revindex\",\"key\":\"source\",\"value\":\"$kind\"" event.trace
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'
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}
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midx_bitmap_core () {
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rev_kind="${1:-midx}"
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setup_bitmap_history
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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 $objdir).bitmap
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'
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test_rev_exists HEAD "$rev_kind"
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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 $objdir).bitmap
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'
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test_rev_exists HEAD "$rev_kind"
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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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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 $b)
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'
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rev_list_tests 'full bitmap with backwards delta'
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test_expect_success 'clone with bitmaps enabled' '
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git clone --no-local --bare . clone-reverse-delta.git &&
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test_when_finished "rm -fr clone-reverse-delta.git" &&
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git rev-parse HEAD >expect &&
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git --git-dir=clone-reverse-delta.git rev-parse HEAD >actual &&
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test_cmp expect actual
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'
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test_expect_success 'changing the preferred pack does not corrupt bitmaps' '
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rm -fr repo &&
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git init repo &&
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test_when_finished "rm -fr repo" &&
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(
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cd repo &&
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test_commit A &&
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test_commit B &&
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git rev-list --objects --no-object-names HEAD^ >A.objects &&
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git rev-list --objects --no-object-names HEAD^.. >B.objects &&
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A=$(git pack-objects $objdir/pack/pack <A.objects) &&
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B=$(git pack-objects $objdir/pack/pack <B.objects) &&
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cat >indexes <<-EOF &&
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pack-$A.idx
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pack-$B.idx
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EOF
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git multi-pack-index write --bitmap --stdin-packs \
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--preferred-pack=pack-$A.pack <indexes &&
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git rev-list --test-bitmap A &&
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git multi-pack-index write --bitmap --stdin-packs \
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--preferred-pack=pack-$B.pack <indexes &&
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git rev-list --test-bitmap A
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)
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'
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}
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midx_bitmap_partial_tests () {
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rev_kind="${1:-midx}"
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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 &&
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test_path_is_file $midx &&
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test_path_is_file $midx-$(midx_checksum $objdir).bitmap
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'
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test_rev_exists HEAD~ "$rev_kind"
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basic_bitmap_tests HEAD~
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}
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