From fcb15f1f0f769b7a0d4630c594a946be2587f6b0 Mon Sep 17 00:00:00 2001
From: Tomeshwari-02 <tomeshwari903@gmail.com>
Date: Fri, 3 Jul 2026 20:07:48 +0530
Subject: [PATCH] Detect package manager for create app add

---
 .../src/commands/add.test.ts                  | 38 +++++++++++++++++--
 .../create-termui-app/src/commands/add.ts     | 17 ++++++++-
 2 files changed, 51 insertions(+), 4 deletions(-)

diff --git a/packages/create-termui-app/src/commands/add.test.ts b/packages/create-termui-app/src/commands/add.test.ts
index f440b72eb..d0f5163ae 100644
--- a/packages/create-termui-app/src/commands/add.test.ts
+++ b/packages/create-termui-app/src/commands/add.test.ts
@@ -1,7 +1,7 @@
 import { describe, expect, it, beforeEach, afterEach, vi } from "vitest";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { mkdirSync, rmSync, existsSync, readFileSync } from "node:fs";
+import { mkdirSync, rmSync, existsSync, readFileSync, writeFileSync } from "node:fs";
 
 vi.mock("node:child_process", () => ({
     execFileSync: vi.fn(),
@@ -133,8 +133,8 @@ describe("runAddCommand", () => {
             'export const Badge = () => "badge";',
         );
         expect(execSpy).toHaveBeenCalledWith(
-            "bun",
-            ["add", "@termuijs/core", "@termuijs/widgets"],
+            "npm",
+            ["install", "@termuijs/core", "@termuijs/widgets"],
             {
                 stdio: "inherit",
             },
@@ -144,6 +144,38 @@ describe("runAddCommand", () => {
         );
     });
 
+    it("uses bun when bun.lock is present", async () => {
+        setupFetchMock();
+        writeFileSync(join(tempDir, "bun.lock"), "");
+        const execSpy = vi.spyOn(childProcess, "execFileSync");
+
+        await runAddCommand({ component: "Badge" });
+
+        expect(execSpy).toHaveBeenCalledWith(
+            "bun",
+            ["add", "@termuijs/core", "@termuijs/widgets"],
+            {
+                stdio: "inherit",
+            },
+        );
+    });
+
+    it("uses pnpm when pnpm-lock.yaml is present", async () => {
+        setupFetchMock();
+        writeFileSync(join(tempDir, "pnpm-lock.yaml"), "");
+        const execSpy = vi.spyOn(childProcess, "execFileSync");
+
+        await runAddCommand({ component: "Badge" });
+
+        expect(execSpy).toHaveBeenCalledWith(
+            "pnpm",
+            ["add", "@termuijs/core", "@termuijs/widgets"],
+            {
+                stdio: "inherit",
+            },
+        );
+    });
+
     it("resolves component names case-insensitively", async () => {
         setupFetchMock();
         vi.spyOn(childProcess, "execFileSync");
diff --git a/packages/create-termui-app/src/commands/add.ts b/packages/create-termui-app/src/commands/add.ts
index 2559b0ecd..fdd394dad 100644
--- a/packages/create-termui-app/src/commands/add.ts
+++ b/packages/create-termui-app/src/commands/add.ts
@@ -27,6 +27,8 @@ interface RegistrySchema {
     components: RegistryComponent[];
 }
 
+type PackageManager = "npm" | "yarn" | "pnpm" | "bun";
+
 export async function runAddCommand(options: AddCommandOptions): Promise<void> {
     const componentName = options.component.trim();
     if (!componentName) {
@@ -213,11 +215,24 @@ async function installPackages(entry: RegistryComponent): Promise<void> {
         return;
     }
 
-    execFileSync("bun", ["add", ...deps], {
+    const pm = detectPackageManager(process.cwd());
+    execFileSync(pm, installArgs(pm, deps), {
         stdio: "inherit",
     });
 }
 
+function detectPackageManager(cwd: string): PackageManager {
+    if (existsSync(join(cwd, "bun.lock"))) return "bun";
+    if (existsSync(join(cwd, "pnpm-lock.yaml"))) return "pnpm";
+    if (existsSync(join(cwd, "yarn.lock"))) return "yarn";
+    return "npm";
+}
+
+function installArgs(pm: PackageManager, deps: string[]): string[] {
+    if (pm === "npm") return ["install", ...deps];
+    return ["add", ...deps];
+}
+
 function pascalCase(value: string): string {
     return value
         .split(/[^a-zA-Z0-9]+/)