npm install functions if needed

Author: hsubox76

scripts/ci-test/deploy-if-needed.ts

@@ -23,6 +23,7 @@
 import { resolve } from 'path';
 import chalk from 'chalk';
 import simpleGit from 'simple-git';
+import { exec } from 'child-process-promise';
 const firebaseTools = require('firebase-tools');
 
 const root = resolve(__dirname, '../..');
@@ -83,6 +84,12 @@ async function deployIfNeeded() {
       chalk`{blue firebase.json changed - deploying full config directory. }`
     );
   }
+  if (flags[0] === 'all' || flags.includes('functions')) {
+    // npm install the dependencies for functions
+    await exec('npm install', {
+      cwd: resolve(__dirname, '../config/functions')
+    });
+  }
   await firebaseTools.deploy(deployOptions);
 }