Added plugins dir

lib/plugins/__init__.py

@@ -0,0 +1,6 @@
+class Plugin(object):
+    def run(self, args):
+        raise NotImplementedError()
+
+# vim:sw=4:ts=4:et:
+

lib/plugins/shell/__init__.py

@@ -0,0 +1,24 @@
+import subprocess
+
+from .. import Plugin
+
+class ShellPlugin(Plugin):
+    def run(self, args):
+        if 'cmd' not in args:
+            raise RuntimeError('No cmd parameter specified')
+
+        cmd = args['cmd']
+        output = None
+        error = None
+
+        try:
+            output = subprocess.check_output(cmd,
+                                             stderr=subprocess.STDOUT,
+                                             shell=True)
+        except subprocess.CalledProcessError as e:
+            error = e.output
+
+        return output, error
+
+# vim:sw=4:ts=4:et:
+