fix: support lib tsc

Author: hg-pyun

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "typescript-performance-analyzer",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "TypeScript compilation performance analyzer",
   "author": "hg-pyun",
   "license": "MIT",
@@ -54,7 +54,8 @@
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "recharts": "^2.15.0",
-    "stream-json": "^1.9.1"
+    "stream-json": "^1.9.1",
+    "typescript": "^5.7.2"
   },
   "devDependencies": {
     "@eslint/js": "^9.39.1",
@@ -69,7 +70,6 @@
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-react-hooks": "^7.0.1",
     "prettier": "^3.7.4",
-    "typescript": "^5.7.2",
     "typescript-eslint": "^8.49.0",
     "vite": "^6.0.3",
     "vite-plugin-singlefile": "^2.0.3",

package.json

@@ -1,4 +1,5 @@
-import { join, resolve } from 'path';
+import { join, resolve, dirname } from 'path';
+import { fileURLToPath } from 'url';
 import { access, mkdir, rm } from 'fs/promises';
 import { spawn } from 'child_process';
 import chalk from 'chalk';
@@ -141,17 +142,30 @@ export async function traceCommand(
 }
 
 /**
- * Find the tsc executable, preferring local node_modules
+ * Find the tsc executable
+ * Priority: 1) Project's local tsc, 2) This package's bundled tsc
  */
 async function findTsc(projectPath: string): Promise<string> {
-  // Try local node_modules first
-  const localTsc = join(projectPath, 'node_modules', '.bin', 'tsc');
+  // Try project's local node_modules first
+  const projectTsc = join(projectPath, 'node_modules', '.bin', 'tsc');
   try {
-    await access(localTsc);
-    return localTsc;
+    await access(projectTsc);
+    return projectTsc;
   } catch {
-    // Fall back to global tsc
-    return 'tsc';
+    // Fall back to this package's bundled tsc
+    const __filename = fileURLToPath(import.meta.url);
+    const __dirname = dirname(__filename);
+    // Navigate from dist/cli/commands/ to package root, then to node_modules
+    const packageRoot = join(__dirname, '..', '..', '..');
+    const bundledTsc = join(packageRoot, 'node_modules', '.bin', 'tsc');
+
+    try {
+      await access(bundledTsc);
+      return bundledTsc;
+    } catch {
+      // Last resort: try global tsc
+      return 'tsc';
+    }
   }
 }
 
@@ -182,6 +196,16 @@ function runTsc(
     });
 
     proc.on('close', (code) => {
+      // Exit code 127 means command not found - this is a fatal error
+      if (code === 127) {
+        reject(
+          new Error(
+            'TypeScript compiler (tsc) not found. Please install TypeScript in your project:\n  npm install typescript --save-dev'
+          )
+        );
+        return;
+      }
+
       // TypeScript may return non-zero exit code for type errors,
       // but trace should still be generated
       if (code !== 0 && verbose) {