chore(cli): improve build tasks

packages/vant-cli/src/common/index.ts

@@ -1,5 +1,4 @@
 import { join } from 'path';
-import { execSync } from 'child_process';
 import {
   lstatSync,
   existsSync,
@@ -156,19 +155,4 @@ export function smartOutputFile(filePath: string, content: string) {
   outputFileSync(filePath, content);
 }
 
-let hasYarnCache: boolean;
-
-export function hasYarn() {
-  if (hasYarnCache === undefined) {
-    try {
-      execSync('yarn --version', { stdio: 'ignore' });
-      hasYarnCache = true;
-    } catch (e) {
-      hasYarnCache = false;
-    }
-  }
-
-  return hasYarnCache;
-}
-
 export { getVantConfig };

packages/vant-cli/src/common/manager.ts

@@ -0,0 +1,36 @@
+// @ts-ignore
+import execa from 'execa';
+import { consola } from './logger';
+import { execSync } from 'child_process';
+
+let hasYarnCache: boolean;
+
+export function hasYarn() {
+  if (hasYarnCache === undefined) {
+    try {
+      execSync('yarn --version', { stdio: 'ignore' });
+      hasYarnCache = true;
+    } catch (e) {
+      hasYarnCache = false;
+    }
+  }
+
+  return hasYarnCache;
+}
+
+export async function installDependencies() {
+  consola.info('Install Dependencies\n');
+
+  try {
+    const manager = hasYarn() ? 'yarn' : 'npm';
+
+    await execa(manager, ['install', '--prod=false'], {
+      stdio: 'inherit'
+    });
+
+    console.log('');
+  } catch (err) {
+    console.log(err);
+    throw err;
+  }
+}