Postinstall: Run command in shell for windows (#8)

src/postinstall.ts

@@ -2,23 +2,44 @@ import { spawn } from "child_process";
 
 type PackageManagers = "npm" | "pnpm" | "yarn1" | "yarn2";
 
-const PACKAGE_MANAGER_TO_COMMAND: Record<PackageManagers, string> = {
-  npm: "npx",
-  pnpm: "pnpm dlx",
-  yarn1: "npx",
-  yarn2: "yarn dlx",
+const PACKAGE_MANAGER_TO_COMMAND: Record<PackageManagers, string[]> = {
+  npm: ["npx"],
+  pnpm: ["pnpm", "dlx"],
+  yarn1: ["npx"],
+  yarn2: ["yarn", "dlx"],
+};
+
+const selectPackageManagerCommand = (
+  packageManager: PackageManagers
+): string[] => PACKAGE_MANAGER_TO_COMMAND[packageManager];
+
+const spawnPackageManagerScript = async (
+  packageManager: PackageManagers,
+  args: string[]
+) => {
+  const [command, ...baseArgs] = selectPackageManagerCommand(packageManager);
+
+  await spawn(command, [...baseArgs, ...args], {
+    stdio: "inherit",
+    cwd: process.cwd(),
+    shell: true,
+  });
 };
 
 const automigrate = async ({
-  packageManager,
+  packageManager = "npm",
 }: {
   packageManager: PackageManagers;
 }) => {
-  const command = PACKAGE_MANAGER_TO_COMMAND[packageManager];
-  await spawn(command, ["@storybook/auto-config", "styling"], {
-    stdio: "inherit",
-    cwd: process.cwd(),
-  });
+  try {
+    await spawnPackageManagerScript(packageManager, [
+      "@storybook/auto-config",
+      "styling",
+    ]);
+  } catch (e) {
+    console.error(e);
+    process.exit(1);
+  }
 };
 
 export default automigrate;