Use 'unzipper' node module instead of system 'unzip'

index.js

@@ -4,6 +4,8 @@ const fs = require('fs');
 const path = require('path');
 const fsp  = require('fs-promise');
 const exec = require('child_process').exec;
+const unzipper = require('unzipper');
+const { Storage } = require('@google-cloud/storage');
 
 function AppNotFoundError(message) {
   let error = new Error(message);
@@ -12,9 +14,7 @@ function AppNotFoundError(message) {
   return error;
 }
 
-let gcloud = require('gcloud');
-
-let storage = gcloud.storage();
+let storage = new Storage();
 
 /*
  * Downloader class that downloads the latest version of the deployed
@@ -102,10 +102,14 @@ class GCloudStorageDownloader {
   unzipApp() {
     let zipPath = this.zipPath;
 
-    return this.exec('unzip ' + zipPath)
-      .then(() => {
-        this.ui.writeLine("unzipped " + zipPath);
-      });
+    return new Promise((resolve, reject) => {
+      const stream = fs.createReadStream(zipPath);
+      stream.pipe(unzipper.Extract({ path: process.cwd() }));
+      stream.on("end", resolve);
+      stream.on("error", reject);
+    }).then(() => {
+      this.ui.writeLine("unzipped " + zipPath);
+    });
   }
 
   installNPMDependencies() {

package.json

@@ -24,7 +24,8 @@
   },
   "homepage": "https://github.com/EmberSherpa/fastboot-gcloud-storage-downloader#readme",
   "dependencies": {
-    "fs-promise": "0.5.0",
-    "gcloud": "0.32.0"
+    "@google-cloud/storage": "^4.1.0",
+    "fs-promise": "2.0.3",
+    "unzipper": "^0.10.5"
   }
 }