From c0c2b693f339e24afcb995ed36e0d35e39d89a5a Mon Sep 17 00:00:00 2001
From: Eugene Pankov <john.pankov@gmail.com>
Date: Thu, 27 Jul 2017 12:54:51 +0200
Subject: [PATCH] autoselect tmux

---
 terminus-terminal/src/index.ts |  7 ++++++-
 terminus-terminal/src/tmux.ts  | 13 +++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/terminus-terminal/src/index.ts b/terminus-terminal/src/index.ts
index fbd77337..ac205528 100644
--- a/terminus-terminal/src/index.ts
+++ b/terminus-terminal/src/index.ts
@@ -48,7 +48,12 @@ import { hterm } from './hterm'
                 if (hostApp.platform === Platform.Windows) {
                     return null
                 } else {
-                    return tmux
+                    if (tmux.isAvailable()) {
+                        tmux.init()
+                        return tmux
+                    } else {
+                        return screen
+                    }
                 }
             },
             deps: [HostAppService, ScreenPersistenceProvider, TMuxPersistenceProvider],
diff --git a/terminus-terminal/src/tmux.ts b/terminus-terminal/src/tmux.ts
index 283366ee..46ac25a6 100644
--- a/terminus-terminal/src/tmux.ts
+++ b/terminus-terminal/src/tmux.ts
@@ -1,4 +1,5 @@
 import { Injectable } from '@angular/core'
+import { execFileSync } from 'child_process'
 import * as AsyncLock from 'async-lock'
 import { ConnectableObservable, Subject } from 'rxjs'
 import * as childProcess from 'child_process'
@@ -166,6 +167,18 @@ export class TMuxPersistenceProvider extends SessionPersistenceProvider {
 
     constructor () {
         super()
+    }
+
+    isAvailable (): boolean {
+        try {
+            execFileSync('tmux', ['-V'])
+            return true
+        } catch (_) {
+            return false
+        }
+    }
+
+    init () {
         this.tmux = new TMux()
     }