git-commit-vandalism/t/lib-parallel-checkout.sh
Matheus Tavares 6a7bc9d118 parallel-checkout: add tests related to path collisions
Add tests to confirm that path collisions are properly detected by
checkout workers, both to avoid race conditions and to report colliding
entries on clone.

Co-authored-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-05-05 12:26:36 +09:00

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# Helpers for tests invoking parallel-checkout
set_checkout_config () {
if test $# -ne 2
then
BUG "usage: set_checkout_config <workers> <threshold>"
fi &&
test_config_global checkout.workers $1 &&
test_config_global checkout.thresholdForParallelism $2
}
# Run "${@:2}" and check that $1 checkout workers were used
test_checkout_workers () {
if test $# -lt 2
then
BUG "too few arguments to test_checkout_workers"
fi &&
local expected_workers=$1 &&
shift &&
local trace_file=trace-test-checkout-workers &&
rm -f "$trace_file" &&
GIT_TRACE2="$(pwd)/$trace_file" "$@" 2>&8 &&
local workers=$(grep "child_start\[..*\] git checkout--worker" "$trace_file" | wc -l) &&
test $workers -eq $expected_workers &&
rm "$trace_file"
} 8>&2 2>&4
# Verify that both the working tree and the index were created correctly
verify_checkout () {
if test $# -ne 1
then
BUG "usage: verify_checkout <repository path>"
fi &&
git -C "$1" diff-index --ignore-submodules=none --exit-code HEAD -- &&
git -C "$1" status --porcelain >"$1".status &&
test_must_be_empty "$1".status
}