feat(mcp): add output prefixing script for CLI test command

Author: cheton

packages/mcp/package.json

@@ -29,7 +29,7 @@
  "pre-push": "bash -c 'echo -e \"=> \\e[1;33m$npm_package_name\\e[0m\"' && yarn run build && yarn run lint && yarn run test",
  "prepublishOnly": "yarn run build",
  "test": "jest --maxWorkers=2 --passWithNoTests",
- "test-cli": "node --test tests/cli.test.mjs"
+ "test-cli": "node scripts/prefix-output.js '[@tonic-ui/mcp] ' -- node --test tests/cli.test.mjs"
  },
  "keywords": [
  "mcp",

packages/mcp/scripts/prefix-output.js

@@ -0,0 +1,79 @@
+#!/usr/bin/env node
+
+/* eslint-disable-next-line @typescript-eslint/no-require-imports */
+const { spawn } = require('child_process');
+
+// Get prefix and command from process.argv
+const [,, prefix, ...commandArgs] = process.argv;
+
+if (!prefix || commandArgs.length === 0) {
+ console.error('Usage: node prefix-output.js <prefix> -- <command> [args...]');
+ process.exit(1);
+}
+
+// Remove the '--' separator if present
+const separatorIndex = commandArgs.indexOf('--');
+const actualCommandArgs = separatorIndex >= 0 ? commandArgs.slice(separatorIndex + 1) : commandArgs;
+
+const [command, ...args] = actualCommandArgs;
+
+// Spawn the process
+const childProcess = spawn(command, args, {
+ stdio: ['inherit', 'pipe', 'pipe']
+});
+
+// Prefix stdout lines
+childProcess.stdout.on('data', (data) => {
+ const lines = data.toString().split('\n');
+ lines.forEach((line, index) => {
+ if (index === lines.length - 1 && line === '') {
+ // Don't add prefix to final empty line
+ return;
+ }
+ try {
+ process.stdout.write(prefix + line + '\n');
+ } catch (err) {
+ if (err.code !== 'EPIPE') {
+ throw err;
+ }
+ }
+ });
+});
+
+// Prefix stderr lines
+childProcess.stderr.on('data', (data) => {
+ const lines = data.toString().split('\n');
+ lines.forEach((line, index) => {
+ if (index === lines.length - 1 && line === '') {
+ // Don't add prefix to final empty line
+ return;
+ }
+ try {
+ process.stderr.write(prefix + line + '\n');
+ } catch (err) {
+ if (err.code !== 'EPIPE') {
+ throw err;
+ }
+ }
+ });
+});
+
+// Handle EPIPE errors gracefully
+process.stdout.on('error', (err) => {
+ if (err.code === 'EPIPE') {
+ process.exit(0);
+ }
+ throw err;
+});
+
+process.stderr.on('error', (err) => {
+ if (err.code === 'EPIPE') {
+ process.exit(0);
+ }
+ throw err;
+});
+
+// Forward exit code
+childProcess.on('close', (code) => {
+ process.exit(code);
+});