fix(test): share one BSK_HOME lock across lib tests

crates/bsk-cli/src/cli/record_recovery.rs

@@ -41,8 +41,7 @@ pub fn clear() {
 
 #[cfg(test)]
 pub(crate) fn test_env_lock() -> std::sync::MutexGuard<'static, ()> {
-    static GUARD: std::sync::Mutex<()> = std::sync::Mutex::new(());
-    GUARD.lock().unwrap_or_else(|e| e.into_inner())
+    crate::daemon::paths::test_env_lock()
 }
 
 #[cfg(test)]

crates/bsk-cli/src/cli/record_state.rs

@@ -59,15 +59,9 @@ fn started_at_unix_ms() -> String {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use std::sync::Mutex;
-
-    fn env_guard() -> &'static Mutex<()> {
-        static GUARD: Mutex<()> = Mutex::new(());
-        &GUARD
-    }
 
     fn with_temp_home<F: FnOnce()>(f: F) {
-        let _lock = env_guard().lock().unwrap_or_else(|e| e.into_inner());
+        let _lock = crate::daemon::paths::test_env_lock();
         let tmp = tempfile::tempdir().unwrap();
         unsafe {
             std::env::set_var(crate::daemon::paths::BSK_HOME_ENV, tmp.path());

crates/bsk-cli/src/daemon/paths.rs

@@ -127,6 +127,13 @@ pub fn pipe_name() -> String {
     render_pipe_name(&user, &home)
 }
 
+/// Process-wide lock for tests that mutate `BSK_HOME`.
+#[cfg(test)]
+pub(crate) fn test_env_lock() -> std::sync::MutexGuard<'static, ()> {
+    static GUARD: std::sync::Mutex<()> = std::sync::Mutex::new(());
+    GUARD.lock().unwrap_or_else(|e| e.into_inner())
+}
+
 /// Render the Windows named-pipe name for a user/home pair. Kept
 /// platform-agnostic so unit tests on any host can pin the output
 /// character set.
@@ -144,19 +151,12 @@ fn render_pipe_name(user: &str, home: &str) -> String {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use std::sync::Mutex;
     use tempfile::TempDir;
 
-    /// Serialise tests that mutate the global `BSK_HOME` env var.
-    fn env_guard() -> &'static Mutex<()> {
-        static GUARD: Mutex<()> = Mutex::new(());
-        &GUARD
-    }
-
     fn with_temp_home<F: FnOnce(&Path)>(f: F) {
-        let _lock = env_guard().lock().unwrap_or_else(|e| e.into_inner());
+        let _lock = test_env_lock();
         let tmp = TempDir::new().unwrap();
-        // SAFETY: serialised by env_guard above.
+        // SAFETY: serialised by test_env_lock above.
         unsafe {
             std::env::set_var(BSK_HOME_ENV, tmp.path().join("bsk"));
         }