add current-apps script

setup.py

@@ -8,6 +8,7 @@ from setuptools.command.test import test as TestCommand
 
 version = "0.0.1.dev1"
 install_require = [
+    'juju'
 ]
 
 tests_require = [
@@ -71,6 +72,7 @@ setup(
     ],
     entry_points={
         'console_scripts': [
+            'current-apps = zaza.model:main',
             'tempest-config = zaza.tempest_config:main',
         ]
     },

zaza/model.py

@@ -0,0 +1,35 @@
+import logging
+import sys
+
+from juju import loop
+from juju.model import Model
+
+
+async def deployed(filter=None):
+    # Create a Model instance. We need to connect our Model to a Juju api
+    # server before we can use it.
+    model = Model()
+    # Connect to the currently active Juju model
+    await model.connect_current()
+    try:
+        # list currently deploeyd services
+        return list(model.applications.keys())
+    finally:
+        # Disconnect from the api server and cleanup.
+        await model.disconnect()
+
+
+def main():
+    # logging.basicConfig(level=logging.INFO)
+
+    # # If you want to see everything sent over the wire, set this to DEBUG.
+    # ws_logger = logging.getLogger('websockets.protocol')
+    # ws_logger.setLevel(logging.INFO)
+
+    # Run the deploy coroutine in an asyncio event loop, using a helper
+    # that abstracts loop creation and teardown.
+    print("Current applications: {}".format( ", ".join(loop.run(deployed()))))
+
+
+if __name__ == '__main__':
+    main()