WORKING_VERSION_ANALYSIS.md•6.65 kB
# Working Version Analysis - console_execute_command
## Test Results Summary
**Working Commit**: 33eb9e5 - "Fix: Remove 30-second timeout limitation and make it configurable"
**Status**: ✅ CONFIRMED WORKING
**Test Result**: `SUCCESS! Result: { output: 'Hello World\r\n', exitCode: 0 }`
## Key Architecture Differences
### 1. **Working Version (33eb9e5) - Event-Driven One-Shot Pattern**
```typescript
async executeCommand(command: string, args?: string[], options?: Partial<SessionOptions>): Promise<{ output: string; exitCode?: number }> {
// Create temporary session
const sessionId = await this.createSession(sessionOptions);
return new Promise((resolve, reject) => {
const outputs: string[] = [];
let timeoutHandle: NodeJS.Timeout | null = null;
const timeoutMs = options?.timeout || 120000; // Configurable timeout
const cleanup = () => {
this.removeListener('console-event', handleEvent);
if (timeoutHandle) clearTimeout(timeoutHandle);
};
const handleEvent = (event: ConsoleEvent) => {
if (event.sessionId !== sessionId) return;
if (event.type === 'output') {
outputs.push(event.data.data);
} else if (event.type === 'stopped') {
cleanup();
this.cleanupSession(sessionId); // Auto-cleanup
resolve({
output: outputs.join(''),
exitCode: event.data.exitCode
});
} else if (event.type === 'error') {
// Only reject on serious errors (connection, auth, network)
if (event.data.error && (
event.data.error.includes('connection') ||
event.data.error.includes('authentication') ||
event.data.error.includes('timeout') ||
event.data.error.includes('network')
)) {
cleanup();
this.cleanupSession(sessionId);
reject(new Error(`Session error: ${event.data.error}`));
}
// Otherwise, treat errors as part of command output
}
};
// Set timeout with proper cleanup
timeoutHandle = setTimeout(() => {
cleanup();
this.stopSession(sessionId).then(() => {
this.cleanupSession(sessionId);
reject(new Error(`Command execution timeout after ${timeoutMs}ms`));
});
}, timeoutMs);
this.on('console-event', handleEvent);
});
}
```
### 2. **Current Broken Version - Incomplete Implementation**
The current master branch has a simplified ConsoleManager that:
- Uses `node-pty` directly (native dependency issues)
- Missing critical methods (`executeCommandInSession`, etc.)
- Incomplete event system
- Build compilation errors
- Missing session lifecycle management
## Critical Success Factors in Working Version
### A. **Robust Session Lifecycle Management**
- **One-shot session creation**: `createSession()` → execute → auto-cleanup
- **Event-driven completion**: Waits for natural `stopped` event
- **Automatic cleanup**: Session resources freed on completion
- **Timeout protection**: Configurable timeout with proper cleanup
### B. **Sophisticated Error Handling**
- **Error categorization**: Only serious errors (connection, auth) cause rejection
- **Command output errors**: Treated as part of output, not execution failure
- **Graceful degradation**: System continues functioning even with command failures
### C. **Event System Architecture**
```typescript
// Listens for natural process events
handleEvent = (event: ConsoleEvent) => {
if (event.type === 'output') outputs.push(event.data.data);
else if (event.type === 'stopped') resolve(result);
}
this.on('console-event', handleEvent);
```
### D. **Configurable Timeout System**
- **Default**: 120000ms (2 minutes) - **NOT 30 seconds**
- **Configurable**: `options?.timeout || 120000`
- **Proper cleanup**: Timeout triggers session stop + cleanup
## Protocol Integration
The working version supports multiple protocols through a unified interface:
- **Local Protocol**: Direct command execution
- **SSH Protocol**: Remote command execution
- **Docker Protocol**: Container command execution
- **Kubernetes Protocol**: Pod command execution
Each protocol emits standardized `console-event` messages that the `executeCommand` method processes uniformly.
## Why This Works
### 1. **Natural Process Lifecycle**
Instead of trying to wait for process completion synchronously, it leverages the natural asynchronous event flow of process execution.
### 2. **Resource Management**
Automatic session cleanup prevents resource leaks and ensures each command execution is isolated.
### 3. **Flexibility**
The event-driven pattern allows handling various execution contexts (local, SSH, Docker, etc.) through the same interface.
### 4. **Robust Error Recovery**
By categorizing errors and only failing on serious issues, the system is more resilient to temporary problems.
## Implementation Recommendations
### Immediate Actions:
1. **Revert to working implementation**: Use the session pattern from 33eb9e5
2. **Fix timeout configuration**: Ensure configurable timeouts (not hardcoded 30s)
3. **Restore event system**: Implement full ConsoleEvent system
4. **Session cleanup**: Implement automatic session resource cleanup
### Architecture Principles:
1. **Event-driven execution**: Never wait synchronously for command completion
2. **Session isolation**: Each command gets its own session context
3. **Automatic cleanup**: Resources must be freed automatically
4. **Error resilience**: Only fail on serious system errors, not command errors
## Technical Details
### Working Command Flow:
1. `executeCommand()` called
2. `createSession()` creates temporary session
3. Event listener established for 'console-event'
4. Session naturally executes command
5. Process events flow through protocol layer
6. 'stopped' event triggers resolution
7. Session automatically cleaned up
### Key Files in Working Version:
- `src/core/ConsoleManager.ts`: Main implementation (lines 7652-7727)
- Event system properly integrated
- Protocol layer functioning
- Session management working
## Conclusion
The working version (33eb9e5) demonstrates a sophisticated, event-driven architecture for command execution that:
- ✅ **Works reliably** for command execution
- ✅ **Handles errors gracefully**
- ✅ **Manages resources properly**
- ✅ **Supports multiple protocols**
- ✅ **Uses configurable timeouts**
The current broken version appears to be an incomplete rewrite that lost these critical architectural patterns.
**Recommendation**: Restore the working implementation from commit 33eb9e5 and build improvements on that foundation rather than attempting to rewrite from scratch.
