Fix mac launcher (#1142)

* Workaround Launcher hardcoded filename now that 2019.2 changed names of executable

* Changelog

* Update CHANGELOG.md

Co-Authored-By: Paul Balaji <[email protected]>

Author: zeroZshadow

CHANGELOG.md

@@ -20,6 +20,10 @@
     - Any fields in a schema type that are a recursive option will now be _skipped_.
     - This is a workaround until full recursive option support is implemented.
 
+### Internal
+
+- Work-around for Mac Launcher using wrong executable name. Generating hardcoded `launcher_client_config.json` for Mac builds. [#1142](https://github.com/spatialos/gdk-for-unity/pull/1142)
+
 ## `0.2.7` - 2019-08-19
 
 ### Breaking Changes

workers/unity/Packages/io.improbable.gdk.buildsystem/WorkerBuilder.cs

@@ -330,12 +330,39 @@ private static bool BuildWorkerForTarget(
                 return true;
             }
 
+            if (buildTarget == BuildTarget.StandaloneOSX)
+            {
+                // Unity executable name has changed on MacOS
+                // This is a temp work around our Launcher trying to run the wrong file.
+                // See [UTY-2294]
+                CreateLaunchJson(workerBuildData.PackageName, Application.productName);
+            }
+
             var zipPath = Path.Combine(PlayerBuildDirectory, workerBuildData.PackageName);
             var basePath = Path.Combine(Common.BuildScratchDirectory, workerBuildData.PackageName);
             Zip(zipPath, basePath, targetEnvironment == BuildEnvironment.Cloud);
             return true;
         }
 
+        private static void CreateLaunchJson(string packageName, string productName)
+        {
+            var basePath = Path.Combine(Common.BuildScratchDirectory, packageName);
+            using (var jsonWriter = File.CreateText(Path.Combine(basePath, "launcher_client_config.json")))
+            {
+                var json = @"{
+  ""command"": " + $"\"./{packageName}.app/Contents/MacOS/{productName}\"," + @"
+  ""arguments"": [
+    ""+projectName"", ""${IMPROBABLE_PROJECT_NAME}"",
+    ""+deploymentName"", ""${IMPROBABLE_DEPLOYMENT_NAME}"",
+    ""+loginToken"", ""${IMPROBABLE_LOGIN_TOKEN}"",
+    ""+playerIdentityToken"", ""${IMPROBABLE_PLAYER_IDENTITY_TOKEN}"",
+    ""+locatorHost"", ""${IMPROBABLE_LOCATOR_HOSTNAME}""
+  ]
+}";
+                jsonWriter.Write(json);
+            }
+        }
+
         private static void Zip(string zipAbsolutePath, string basePath, bool useCompression)
         {
             using (new ShowProgressBarScope($"Package {basePath}"))