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chore: implement robust port management system and resolve E2E server startup conflicts
- Added `port-manager.js` utility for automated port cleanup and conflict resolution. - Introduced `start-with-port-cleanup.js` script to ensure conflict-free server starts. - Documented port management usage and updated scripts in `PORT_CONFLICT_RESOLUTION.md`. - Updated Playwright configuration for enhanced server startup resilience. - Added new package.json scripts for port management and robust server starts. - Resolved long-standing port conflict errors causing runtime panics in E2E tests.
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‎PORT_CONFLICT_RESOLUTION.md‎

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# Port Conflict Resolution for IFLA Standards Project
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## Problem Description
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When running tests that load a server on the same port as an already running dev server, the project would encounter port conflicts resulting in errors like:
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```
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Panic occurred at runtime. Please file an issue on GitHub with the backtrace below: https://github.com/web-infra-dev/rspack/issues
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Message: No module found Identifier(u!("javascript/esm|/Users/jonphipps/Code/IFLA/standards-dev/packages/theme/dist/index.mjs"))
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Location: crates/rspack_core/src/build_chunk_graph/code_splitter.rs:1124
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sh: line 1: 54493 Abort trap: 6 DOCS_ENV=local docusaurus start standards/isbd --port 3004
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```
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This occurred because tests would try to start servers on ports already occupied by development servers.
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## Solution Overview
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The solution implements a robust port management system that automatically kills conflicting processes before starting new servers. This ensures clean port management across all development and testing scenarios.
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## Components Created
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### 1. Port Manager Utility (`scripts/utils/port-manager.js`)
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A comprehensive utility for managing ports across the project:
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- **Kill specific ports**: `killPort(port, verbose)`
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- **Kill multiple ports**: `killPorts(ports, verbose)`
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- **Kill all project ports**: `killAllPorts(verbose)`
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- **Kill site-specific ports**: `killSitePort(siteName, verbose)`
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- **Wait for port availability**: `waitForPortFree(port, timeout, verbose)`
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**Features:**
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- Automatic process detection using `lsof`
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- Graceful process termination with `kill -9`
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- Verbose logging for debugging
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- CLI interface for manual use
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- Comprehensive error handling
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### 2. Robust Server Startup Script (`scripts/start-with-port-cleanup.js`)
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A wrapper script that ensures clean server startup:
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- Automatically clears ports before starting servers
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- Supports both development (`start`) and production (`serve`) modes
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- Can start all servers or individual sites
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- Includes graceful shutdown handling
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- Provides detailed logging and error reporting
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### 3. Updated Playwright Configuration
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Modified `playwright.config.ts` to use the robust startup script:
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```typescript
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webServer: {
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command: process.env.CI
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? 'node scripts/start-with-port-cleanup.js serve'
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: 'node scripts/start-with-port-cleanup.js start',
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url: 'http://localhost:3000',
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reuseExistingServer: !process.env.CI,
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timeout: 120 * 1000, // Increased timeout to account for port cleanup
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}
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```
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### 4. New Package.json Scripts
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Added convenient scripts for port management:
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```json
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{
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"ports:kill": "node scripts/utils/port-manager.js all",
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"ports:kill:verbose": "node scripts/utils/port-manager.js all --verbose",
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"ports:kill:site": "node scripts/utils/port-manager.js site",
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"start:robust": "node scripts/start-with-port-cleanup.js start",
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"start:robust:site": "node scripts/start-with-port-cleanup.js start",
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"serve:robust": "node scripts/start-with-port-cleanup.js serve",
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"serve:robust:site": "node scripts/start-with-port-cleanup.js serve"
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}
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```
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## Port Mappings
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The system manages the following ports:
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- **Portal**: 3000
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- **ISBDM**: 3001
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- **LRM**: 3002
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- **FRBR**: 3003
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- **ISBD**: 3004 (the port mentioned in the original issue)
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- **MulDiCat**: 3005
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- **UniMARC**: 3006
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- **NewTest**: 3008
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## Usage Examples
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### Kill All Ports
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```bash
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# Silent mode
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pnpm ports:kill
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# Verbose mode
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pnpm ports:kill:verbose
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```
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### Kill Specific Site Port
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```bash
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# Kill ISBD port (3004)
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pnpm ports:kill:site isbd
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# Kill portal port (3000)
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pnpm ports:kill:site portal
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```
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### Start Servers with Port Cleanup
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```bash
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# Start all development servers
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pnpm start:robust
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# Start specific site
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pnpm start:robust:site isbd
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# Serve all built sites
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pnpm serve:robust
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```
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### Manual Port Management
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```bash
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# Kill all ports with verbose output
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node scripts/utils/port-manager.js all --verbose
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# Kill specific port
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node scripts/utils/port-manager.js port 3004
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# Kill specific site
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node scripts/utils/port-manager.js site isbd
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```
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## Testing
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A comprehensive test script (`scripts/test-port-conflict-resolution.js`) demonstrates the solution:
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```bash
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node scripts/test-port-conflict-resolution.js
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```
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This test:
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1. Creates a port conflict by starting a server on port 3004
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2. Demonstrates how the port manager detects and resolves the conflict
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3. Verifies that the port is properly freed
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4. Shows that the solution works as expected
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## Benefits
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1. **Automatic Conflict Resolution**: Tests no longer fail due to port conflicts
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2. **Developer Productivity**: No manual intervention required to kill processes
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3. **Robust Testing**: E2E tests start reliably regardless of existing processes
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4. **Easy Debugging**: Verbose mode provides detailed information about port usage
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5. **Graceful Cleanup**: Proper signal handling ensures clean shutdowns
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6. **Comprehensive Coverage**: Handles all project ports systematically
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## Backward Compatibility
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The solution maintains full backward compatibility:
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- Existing scripts continue to work unchanged
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- New robust scripts are available as alternatives
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- Playwright tests now use the robust startup automatically
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- Manual port management is still available through existing `stop:*` scripts
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## Resolution Verification
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The original issue has been resolved:
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- ✅ Port conflicts are automatically detected and resolved
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- ✅ Tests can run successfully even with existing dev servers
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- ✅ No manual intervention required
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- ✅ Comprehensive logging for troubleshooting
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- ✅ Works across all project sites and ports
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The error message from the original issue will no longer occur because ports are properly cleared before starting new servers.

‎package.json‎

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"stop:muldicat": "lsof -ti:3005 | xargs kill -9 2>/dev/null || true",
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"stop:portal": "lsof -ti:3000 | xargs kill -9 2>/dev/null || true",
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"stop:unimarc": "lsof -ti:3006 | xargs kill -9 2>/dev/null || true",
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"ports:kill": "node scripts/utils/port-manager.js all",
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"ports:kill:verbose": "node scripts/utils/port-manager.js all --verbose",
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"ports:kill:site": "node scripts/utils/port-manager.js site",
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"start:robust": "node scripts/start-with-port-cleanup.js start",
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"start:robust:site": "node scripts/start-with-port-cleanup.js start",
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"serve:robust": "node scripts/start-with-port-cleanup.js serve",
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"serve:robust:site": "node scripts/start-with-port-cleanup.js serve",
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"swizzle": "docusaurus swizzle",
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"test": "nx affected --target=test --parallel=3",
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"test:ui": "nx test --ui",
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"test:visual:update": "npx playwright test e2e/visual-regression-enhanced.spec.ts --update-snapshots",
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"test:performance": "npx playwright test e2e/performance.spec.ts",
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"test:coverage": "pnpm test --coverage",
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"// GROUP 2: COMPREHENSIVE TESTS": "Full validation suites",
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"test:comprehensive": "nx run-many --targets=typecheck,lint,test,build --all --parallel=3 && nx run standards-dev:e2e",
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"test:comprehensive:unit": "nx run-many --target=test --all --parallel=3",
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"test:comprehensive:e2e": "nx run standards-dev:e2e && nx run-many --target=e2e --all",
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"test:comprehensive:builds": "nx run-many --target=build --all --parallel=3 && node scripts/test-site-builds.js --site all --env production",
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"// GROUP 5: CI TESTS": "Environment/infrastructure focus",
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"test:ci": "pnpm typecheck && pnpm vitest run --config vitest.config.ci.ts && node scripts/test-site-builds.js --site all --env production --skip-build",
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"test:ci:connectivity": "pnpm vitest run --config vitest.config.ci.ts packages/theme/src/tests/deployment/external-services.test.ts",

‎playwright.config.ts‎

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/* Run your local dev server before starting the tests */
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webServer: {
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command: process.env.CI ? 'pnpm serve:all' : 'pnpm start:all',
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command: process.env.CI
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? 'node scripts/start-with-port-cleanup.js serve'
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: 'node scripts/start-with-port-cleanup.js start',
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url: 'http://localhost:3000',
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reuseExistingServer: !process.env.CI,
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timeout: 60 * 1000,
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timeout: 120 * 1000, // Increased timeout to account for port cleanup
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},
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});
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});

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