Modify package.json file

Author: Ahmed Elshaabany

script.js

@@ -1,3 +1,37 @@
 #!/usr/bin/env node
 
+const execSync = require('child_process').execSync;
+const fs = require('fs');
+const path = require('path');
+
+/**
+ * Use Yarn if available, it's much faster than the npm client.
+ * Return the version of yarn installed on the system, null if yarn is not available.
+ */
+function getYarnVersionIfAvailable() {
+  let yarnVersion;
+  try {
+    // execSync returns a Buffer -> convert to string
+    yarnVersion = (execSync('yarn --version', {
+      stdio: [0, 'pipe', 'ignore'],
+    }).toString() || '').trim();
+  } catch (error) {
+    return null;
+  }
+  return yarnVersion;
+}
+
+function installDevDependencies() {
+    console.log('Adding dev dependencies for the project...');
+  
+    if (getYarnVersionIfAvailable()) {
+        execSync(`yarn install`, { stdio: 'inherit' });
+    } else {
+        execSync(`npm install`);
+    }
+  }
+  
+  installDevDependencies();
+  createScripts();
+
 console.log("This is post init script");