git-commit-vandalism/t/perf/p5326-multi-pack-bitmaps.sh
Taylor Blau 2082224f17 p5326: create missing 'perf-tag' tag
Some of the tests in test_full_bitmap rely on having a tag named
perf-tag in place. We could create it in test_full_bitmap(), but we want
to have it in place before the repack starts.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-14 16:34:18 -07:00

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#!/bin/sh
test_description='Tests performance using midx bitmaps'
. ./perf-lib.sh
. "${TEST_DIRECTORY}/perf/lib-bitmap.sh"
test_perf_large_repo
test_expect_success 'enable multi-pack index' '
git config core.multiPackIndex true
'
# we need to create the tag up front such that it is covered by the repack and
# thus by generated bitmaps.
test_expect_success 'create tags' '
git tag --message="tag pointing to HEAD" perf-tag HEAD
'
test_perf 'setup multi-pack index' '
git repack -ad &&
git multi-pack-index write --bitmap
'
test_full_bitmap
test_expect_success 'create partial bitmap state' '
# pick a commit to represent the repo tip in the past
cutoff=$(git rev-list HEAD~100 -1) &&
orig_tip=$(git rev-parse HEAD) &&
# now pretend we have just one tip
rm -rf .git/logs .git/refs/* .git/packed-refs &&
git update-ref HEAD $cutoff &&
# and then repack, which will leave us with a nice
# big bitmap pack of the "old" history, and all of
# the new history will be loose, as if it had been pushed
# up incrementally and exploded via unpack-objects
git repack -Ad &&
git multi-pack-index write --bitmap &&
# and now restore our original tip, as if the pushes
# had happened
git update-ref HEAD $orig_tip
'
test_partial_bitmap
test_done