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If the target is a folder and it already exists, a
cp
will not copy the folder correctly.For example, let's say the cache is
/var/cache/buildkite/978d7c5ebf8d670814180efd0e18ca4745059acd
and we want to restore/go
.If the
/go
already exists,cp -a "$from" "$to"
will create the folder978d7c5ebf8d670814180efd0e18ca4745059acd
under the/go
folder instead of copying it as it.This PR fixes this issue.