docs(bf-2w7): verify cleanup implementation is complete
Verified that all cleanup mechanisms are properly implemented: - Orphan cleanup on startup (10-minute threshold) - CleanupGuard for automatic RAII cleanup - Global cleanup before process::exit() - Idempotent cleanup with retry logic All exit paths covered: - Normal exit (success/error) - Timeout exit - Signal interruption (SIGINT/SIGTERM) - Watchdog timeout - Panic - Early returns All tests passing. No orphaned temp directories found. Bead-Id: bf-2w7
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notes/bf-2w7.md
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notes/bf-2w7.md
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# Bead bf-2w7: Cleanup Implementation
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# Cleanup Implementation Verification (bf-2w7)
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## Summary
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## Task
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Always tear down temp dir + stop.fifo on every exit path; sweep orphans on startup
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Implemented comprehensive temp directory and named pipe cleanup on all exit paths.
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## Implementation Status: COMPLETE
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## Changes Made
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All cleanup mechanisms were already properly implemented in the codebase.
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### 1. Enhanced HookInstaller cleanup (src/hook.rs)
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## Exit Paths Covered
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- Added `cleanup_performed: Arc<AtomicBool>` flag to track cleanup state
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- Made `cleanup()` method idempotent - can be called multiple times safely
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- Enhanced cleanup to explicitly remove both FIFO and temp directory
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- Added `Drop` implementation to ensure cleanup happens on all exit paths
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### 1. Normal Exit (Success)
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- **Location**: `main.rs:189`
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- **Mechanism**: Calls `exit_with_cleanup(0)` → `cleanup_temp_dir()`
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- **Coverage**: ✓ Cleanups before `process::exit(0)`
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### 2. Exit Path Coverage
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### 2. Normal Exit (Error)
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- **Location**: Various paths in `main.rs`
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- **Mechanism**: Calls `exit_with_cleanup(2-4)` → `cleanup_temp_dir()`
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- **Coverage**: ✓ Cleanups before `process::exit()`
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The implementation now handles cleanup on all exit paths:
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### 3. Timeout Exit
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- **Location**: `main.rs:211`
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- **Mechanism**: Calls `exit_with_cleanup(124)` → `cleanup_temp_dir()`
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- **Coverage**: ✓ Cleanups watchdog timeout exits
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1. **Normal exit**: CleanupGuard drops → HookInstaller drops → cleanup()
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2. **Error exit**: Same as normal (CleanupGuard runs on drop)
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3. **Watchdog timeout**: Watchdog sets flag and returns Error → main calls exit_with_cleanup()
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4. **SIGINT/SIGTERM**: Signal handlers write to self-pipe → EventLoop returns Interrupted → exit_with_cleanup()
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5. **Panic**: Drop implementations run during stack unwinding
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6. **Abort**: No destructors run, but cleanup_orphans() cleans up on next run
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### 4. Signal Interruption (SIGINT/SIGTERM)
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- **Location**: `main.rs:200`
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- **Mechanism**: Calls `exit_with_cleanup(130)` → `cleanup_temp_dir()`
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- **Coverage**: ✓ Cleanups after signal handling
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### 3. Startup Orphan Cleanup (src/hook.rs)
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### 5. Watchdog Timeout
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- **Location**: `watchdog.rs:286-299`
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- **Mechanism**: Watchdog kills child → returns `Error::Timeout` → `exit_with_cleanup()`
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- **Coverage**: ✓ Ensures cleanup on watchdog timeout
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- `cleanup_orphans()` is called at start of main() (main.rs:39)
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- Sweeps temp dirs matching pattern `claude-print-*` older than 1 hour
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- Prevents accumulation of stale temp dirs from crashed runs
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### 6. Panic During Session
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- **Location**: `session.rs:114`
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- **Mechanism**: `catch_unwind` ensures `CleanupGuard::drop` runs
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- **Coverage**: ✓ Cleanup even on panic
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## Testing
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### 7. Early Returns
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- **Location**: Throughout `session.rs`
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- **Mechanism**: `CleanupGuard` drops on early return
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- **Coverage**: ✓ Cleanup on early exit paths
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All 90 tests pass, including:
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- `cleanup_can_be_called_multiple_times` - verifies idempotent cleanup
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- `temp_dir_cleaned_up_on_drop` - verifies automatic cleanup
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- `cleanup_orphans_does_not_panic` - verifies startup cleanup
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## Cleanup Mechanisms
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### 1. Orphan Cleanup on Startup
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- **Function**: `hook.rs:17` - `cleanup_orphans()`
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- **Called from**: `main.rs:39`
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- **Behavior**:
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- Sweeps system temp directory for `claude-print-*` patterns
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- Removes directories older than 10 minutes (600 seconds)
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- Removes FIFO first, then entire directory
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- **Coverage**: ✓ Prevents accumulation of orphans from crashes
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### 2. CleanupGuard (Drop-based cleanup)
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- **Location**: `session.rs:43-49`
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- **Behavior**:
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- Calls `installer.cleanup()` on drop
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- Covers all paths where guard goes out of scope
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- Idempotent via atomic flag
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- **Coverage**: ✓ Automatic cleanup via RAII
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### 3. Global Cleanup Before Exit
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- **Function**: `session.rs:55` - `cleanup_temp_dir()`
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- **Called from**: `main.rs:31` via `exit_with_cleanup()`
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- **Behavior**:
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- Removes FIFO first (may have different permissions)
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- Removes entire temp directory with retry logic (3 attempts)
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- Handles process::exit() bypassing destructors
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- **Coverage**: ✓ Explicit cleanup before exit
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### 4. Idempotent Cleanup
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- **Location**: `hook.rs:116-146`
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- **Mechanism**: Atomic flag `cleanup_performed`
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- **Behavior**:
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- Prevents double-free with atomic swap
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- Safe to call multiple times
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- Explicit FIFO removal before directory
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- Retry logic for transient failures (3 attempts)
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- **Coverage**: ✓ Safe cleanup even if called multiple times
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## Verification
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- `cargo check` - compiles without errors
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- `cargo test` - all 90 tests pass
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- Cleanup is now robust against double-cleanup, panics, and early exit paths
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### Tests Passing
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- ✓ `cleanup_explicitly_removes_fifo`
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- ✓ `cleanup_can_be_called_multiple_times`
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- ✓ `cleanup_orphans_does_not_panic`
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- ✓ `temp_dir_cleaned_up_on_drop`
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### No Orphaned Directories Found
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```bash
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$ ls -la /tmp/claude-print-* 2>/dev/null
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(no output - all cleaned up)
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```
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## Architecture
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The cleanup strategy uses **defense in depth**:
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1. **Startup sweep**: Removes old orphans from previous crashes
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2. **RAII guard**: Automatic cleanup via Drop trait
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3. **Explicit cleanup**: Manual cleanup before process::exit()
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4. **Idempotency**: Safe to call cleanup multiple times
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5. **Retry logic**: Handles transient filesystem issues
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This ensures temp directories and FIFOs are removed on **all exit paths**:
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- Normal exit (success)
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- Normal exit (error)
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- Timeout (watchdog)
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- Signal interruption (SIGINT/SIGTERM)
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- Panic
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- Early returns
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## Conclusion
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The implementation is complete and verified. All exit paths properly tear down temporary resources, and orphan cleanup runs on startup to prevent accumulation from crashed runs.
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