From acb2be4ac62558778b57701ff11b31ff826dbf12 Mon Sep 17 00:00:00 2001
From: Gregg Tavares <github@greggman.com>
Date: Fri, 1 May 2015 19:20:57 +0900
Subject: [PATCH] add checkPrerequisites for platforms

---
 lib/platform-info.js | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/lib/platform-info.js b/lib/platform-info.js
index 526997f1..68127f88 100644
--- a/lib/platform-info.js
+++ b/lib/platform-info.js
@@ -31,7 +31,20 @@
 "use strict";
 
 var fs           = require('fs');
+var Promise      = require('promise');
 var strings      = require('./strings');
+var utils        = require('./utils');
+
+var execP = Promise.denodeify(utils.execute);
+
+function checkInstalledLinux(pkg) {
+  return execP("dpkg", ["-s", pkg]).then(function(result) {
+    return Promise.resolve();
+  }).catch(function() {
+    var msg = "missing package: " + pkg + ". Please install it";
+    return Promise.reject(msg);
+  });
+}
 
 module.exports = (function() {
   var p = process.platform.toLowerCase();
@@ -51,6 +64,9 @@ module.exports = (function() {
           }
         }
       }()),
+      checkForPrerequisites: function() {
+        return Promise.resolve();
+      },
     };
   } else if (p === 'darwin') {
     return {
@@ -59,12 +75,21 @@ module.exports = (function() {
       exePath: "bin/%(gameId)s-osx.app/Contents/MacOS/%(gameId)s-osx",
       launcher: "open",
       exporterPath: "/Applications/Unity/Unity.app/Contents/MacOS/Unity",
+      checkForPrerequisites: function() {
+        return Promise.resolve();
+      },
     };
   } else {
     return {
       id: "linux",
       exePath: "bin/%(gameId)s-linux.x86",
       exeSuffix: "-linux.x86",
+      checkForPrerequisites: function() {
+        return checkInstalledLinux("zenity")
+            .then(function() {
+               return checkInstalledLinux("wmctrl");
+            });
+      },
     };
   }
 }());