Merge ~jocave/plainbox-provider-checkbox:bluez-controller-detect into plainbox-provider-checkbox:master

[Jonathan Cave]

Add a follow on detect job so that if rfkill identifies a bluetooth adapter a simple test is carried out to see if Bluez is able to detect it.

This should give a better picture of whether basic bluez setup is correct before attempting to connect with another device (e.g. by the eddystone test)

Tested on a Pi3 B+ in the lab running remote.

diff --git a/bin/bluez_list_adapters.py b/bin/bluez_list_adapters.py
 new file mode 100755
index 0000000..87c68c2
--- /dev/null
+++ b/bin/bluez_list_adapters.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+#
+# This file is part of Checkbox.
+#
+# Copyright 2018 Canonical Ltd.
+#
+# Authors:
+# Jonathan Cave <[e-mail]>
+#
+# Checkbox is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 3,
+# as published by the Free Software Foundation.
+#
+# Checkbox is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Checkbox.  If not, see <http://www.gnu.org/licenses/>.
+
+import checkbox_support.bt_helper as bt_helper
+
+import sys
+
+
+def main():
+    manager = bt_helper.BtManager()
+    bt_adapter_not_found = True
+    for dev in manager.get_bt_adapters():
+        bt_adapter_not_found = False
+        print(dev._if.object_path.split('/')[-1])
+    return bt_adapter_not_found
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/units/bluetooth/jobs.pxu b/units/bluetooth/jobs.pxu
index 3b71e70..f40a6e0 100644
--- a/units/bluetooth/jobs.pxu
+++ b/units/bluetooth/jobs.pxu
@@ -10,6 +10,22 @@ flags: preserve-locale
 requires: manifest.has_bt_adapter
 imports: from com.canonical.plainbox import manifest
 
+id: bluetooth/bluez-controller-detect
+category_id: com.canonical.plainbox::bluetooth
+_summary: Check bluez lists a controller if rfkill detects one
+plugin: shell
+user: root
+depends: bluetooth/detect
+template-engine: jinja2
+requires:
+  package.name == 'bluez' or snap.name == 'bluez'
+  {%- if __on_ubuntucore__ %}
+  connections.slot == 'bluez:service' and connections.plug == '{{ __system_env__["SNAP_NAME"] }}:bluez'
+  {% endif -%}
+command:
+  bluez_list_adapters.py
+estimated_duration: 2s
+flags: preserve-locale
 
 plugin: shell
 category_id: com.canonical.plainbox::bluetooth