Module current_dir 

Process working-directory guard for tests. Process-current-directory guard for tests.

The process working directory is global mutable state: a test that calls std::env::set_current_dir mutates a value every other test in the same binary observes. CurrentDirGuard makes that safe by

1. holding a process-wide lock for its lifetime, so concurrent tests in the same binary cannot interleave their directory changes, and
2. restoring the previous working directory on drop, so a change never leaks into a later test.

It is the working-directory analogue of the env-var mutex pattern: any test that depends on or mutates the current directory should hold a guard for the duration of that dependence.

use rskit_testutil::CurrentDirGuard;

let _cwd = CurrentDirGuard::change_to(repo_root)?;
// ... code here observes `repo_root` as the working directory ...
// the previous directory is restored when `_cwd` drops.

Structs

CurrentDirGuard

An RAII guard that pins the process working directory for its lifetime and restores the previous directory when dropped.