emu-runner to save from shutdowns

README.md

@@ -15,7 +15,6 @@ In order to run `socket.io-computer` you must have the following
 dependenices installed:
 
 - `qemu`
-- `vncsnapshot`
 - `redis-server`
 
 On the mac, all of the above are available on [homebrew](http://brew.sh/).
@@ -39,10 +38,10 @@ $ node app.js
 $ node io.js
 
 # qemu instance
-$ COMPUTER_ISO=xp.iso COMPUTER_IMG=winxp.img node qemu.js
+$ COMPUTER_ISO=winxp.iso COMPUTER_IMG=winxp.img node qemu.js
 
 # emulator communication process
-$ node emu.js
+$ COMPUTER_IMG=winxp.img node emu-runner.js
 ```
 
 Then point your browser to `http://localhost:5000`.

computer.js

@@ -18,6 +18,7 @@ module.exports = Computer;
 function Computer() {
   if (!(this instanceof Computer)) return new Computer();
   this.running = false;
+  this.img = process.env.COMPUTER_IMG || null;
 }
 
 Computer.prototype.__proto__ = Emitter.prototype;
@@ -68,7 +69,7 @@ Computer.prototype.run = function() {
 
 // saves a snapshot of disk image to the given filename
 Computer.prototype.snapshot = function(name) {
-  if (!this.running) return;
+  if (!this.running || !this.img) return;
 
   var command = 'qemu-img create -f qcow2 -b' + this.img + ' ' + name;
   exec(command, function(error, stdout, stderr) {

emu-runner.js

@@ -0,0 +1,20 @@
+var forever = require('forever-monitor');
+
+function startEmu() {
+  var child = new (forever.Monitor)('emu.js', {
+      max: 1,
+      silent: false,
+      options: []
+  });
+
+  child.on('exit', function () {
+    console.log('THE EMULATOR DIED');
+    setTimeout(function() {
+      startEmu();
+    }, 500);
+  });
+
+  child.start();
+}
+
+startEmu();

package.json

@@ -31,6 +31,7 @@
     "socket.io": "1.0.0-pre4",
     "socket.io-client": "1.0.0-pre4",
     "socket.io-emitter": "0.1.0",
-    "socket.io-redis": "0.1.2"
+    "socket.io-redis": "0.1.2",
+    "forever-monitor": "~1.2.3"
   }
 }