Fix compatibility with WSL2

src/utils/port.ts

@@ -1,25 +1,75 @@
 import { execSync } from "node:child_process";
+import { readFileSync } from "node:fs";
 import net from "node:net";
 
+function isWSL2(): boolean {
+  try {
+    const versionInfo = readFileSync("/proc/version", "utf8");
+    return versionInfo.includes("microsoft") && versionInfo.includes("WSL2");
+  } catch {
+    return false;
+  }
+}
+
+function killLinuxProcess(port: number): void {
+  try {
+    execSync(`lsof -ti:${port} | xargs kill -9`, { stdio: "pipe" });
+  } catch {
+    // Process might not be running on Linux side
+  }
+}
+
+function killWindowsProcessViaPsh(port: number): void {
+  try {
+    const command = `powershell.exe "Get-NetTCPConnection -LocalPort ${port} -ErrorAction SilentlyContinue | ForEach-Object { Stop-Process -Id \$_.OwningProcess -Force -ErrorAction SilentlyContinue }"`;
+    execSync(command, { stdio: "pipe" });
+  } catch {
+    // Process might not be running on Windows side
+  }
+}
+
+function killWSL2Process(port: number): void {
+  // In WSL2, processes can run on either Linux or Windows side
+  // We need to check both since we don't know which one is actually using the port
+  killLinuxProcess(port);
+  killWindowsProcessViaPsh(port);
+}
+
+function killWindowsProcessViaCmd(port: number): void {
+  const command = `FOR /F "tokens=5" %a in ('netstat -ano ^| findstr :${port}') do taskkill /F /PID %a`;
+  execSync(command);
+}
+
+function killNativeLinuxProcess(port: number): void {
+  execSync(`lsof -ti:${port} | xargs kill -9`);
+}
+
 export async function isPortInUse(port: number): Promise<boolean> {
   return new Promise((resolve) => {
     const server = net.createServer();
-    server.once("error", () => resolve(true)); // Port is still in use
+
+    server.once("error", () => {
+      resolve(true); // Port is in use
+    });
+
     server.once("listening", () => {
-      server.close(() => resolve(false)); // Port is free
+      server.close(() => {
+        resolve(false); // Port is free
+      });
     });
+
     server.listen(port);
   });
 }
 
-export function killProcessOnPort(port: number) {
+export function killProcessOnPort(port: number): void {
   try {
-    if (process.platform === "win32") {
-      execSync(
-        `FOR /F "tokens=5" %a in ('netstat -ano ^| findstr :${port}') do taskkill /F /PID %a`,
-      );
+    if (isWSL2()) {
+      killWSL2Process(port);
+    } else if (process.platform === "win32") {
+      killWindowsProcessViaCmd(port);
     } else {
-      execSync(`lsof -ti:${port} | xargs kill -9`);
+      killNativeLinuxProcess(port);
     }
   } catch (error) {
     console.error(`Failed to kill process on port ${port}:`, error);