pub const KTSTR_CACHE_DIR_ENV: &str = "KTSTR_CACHE_DIR";Expand description
Name of the environment variable that overrides ktstr’s cache
root directory (kernel-build cache, btf-anchor cache, blob
cache, etc.). Empty / unset falls back to the per-user default
(typically $HOME/.cache/ktstr). Heavy test usage —
crate::test_support::test_helpers::IsolatedCacheDir sets it
to a temp dir per-test so cache reads don’t leak host state
into the test, and post-test the original value is restored
via crate::test_support::test_helpers::EnvVarGuard.