add code to cache jobs on the minion if option is set

salt/config.py

@@ -80,6 +80,7 @@ def minion_config(path):
             'pki_dir': '/etc/salt/pki',
             'id': socket.getfqdn(),
             'cachedir': '/var/cache/salt',
+            'cache_jobs': False,
             'conf_file': path,
             'renderer': 'yaml_jinja',
             'failhard': False,

salt/minion.py

@@ -312,8 +312,21 @@ class Minion(object):
         except KeyError:
             pass
         payload['load'] = self.crypticle.dumps(load)
-        socket.send(self.serial.dumps(payload))
-        return socket.recv()
+        data = self.serial.dumps(payload)
+        socket.send(data)
+        ret = socket.recv()
+        if self.opts['cache_jobs']:
+            # Local job cache has been enabled
+            fn_ = os.path.join(
+                    self.opts['cachedir'],
+                    'minion_jobs',
+                    load['jid'],
+                    'return.p')
+            jdir = os.path.dirname(fn_)
+            if not os.path.isdir(jdir):
+                os.makedirs(jdir)
+            open(fn_, 'w+').write(load)
+        return ret
 
     def authenticate(self):
         '''