Add support for removing machine placement in a bundle

setup.py

@@ -99,6 +99,7 @@ setup(
             'functest-test = zaza.charm_lifecycle.test:main',
             'current-apps = zaza.model:main',
             'tempest-config = zaza.tempest_config:main',
+            'flatten-bundle = zaza.utilities.bundle:main',
         ]
     },
     license='Apache-2.0: http://www.apache.org/licenses/LICENSE-2.0',

tox.ini

@@ -51,3 +51,10 @@ passenv = USER
 commands =
     {envdir}/bin/python3 setup.py install
     sudo su {env:USER} -c 'source {envdir}/bin/activate && functest-run-suite --keep-model'
+
+[testenv:flatten]
+basepython = python3
+deps = -r{toxinidir}/requirements.txt
+commands =
+    {envdir}/bin/python3 setup.py install
+    flatten-bundle {posargs}

unit_tests/utilities/test_zaza_utilities_bundle.py

@@ -0,0 +1,108 @@
+# Copyright 2018 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# import mock
+
+import unit_tests.utils as ut_utils
+import zaza.utilities.bundle as bundle
+
+import yaml
+
+TEST_BUNDLE_WITH_PLACEMENT = """
+machines:
+  '0':
+    series: bionic
+  '1':
+    series: bionic
+  '2':
+    series: bionic
+relations:
+- - ceph-osd:mon
+  - ceph-mon:osd
+series: bionic
+services:
+  ceph-mon:
+    annotations:
+      gui-x: '750'
+      gui-y: '500'
+    charm: cs:ceph-mon-26
+    num_units: 3
+    options:
+      expected-osd-count: 3
+      source: cloud:bionic-rocky
+    to:
+    - lxd:0
+    - lxd:1
+    - lxd:2
+  ceph-osd:
+    annotations:
+      gui-x: '1000'
+      gui-y: '500'
+    charm: cs:ceph-osd-269
+    num_units: 3
+    options:
+      osd-devices: /dev/sdb
+      source: cloud:bionic-rocky
+    to:
+    - '0'
+    - '1'
+    - '2'
+"""
+
+
+TEST_BUNDLE_WITHOUT_PLACEMENT = """
+relations:
+- - ceph-osd:mon
+  - ceph-mon:osd
+series: bionic
+services:
+  ceph-mon:
+    annotations:
+      gui-x: '750'
+      gui-y: '500'
+    charm: cs:ceph-mon-26
+    num_units: 3
+    options:
+      expected-osd-count: 3
+      source: cloud:bionic-rocky
+  ceph-osd:
+    annotations:
+      gui-x: '1000'
+      gui-y: '500'
+    charm: cs:ceph-osd-269
+    num_units: 3
+    options:
+      osd-devices: /dev/sdb
+      source: cloud:bionic-rocky
+"""
+
+
+class TestUtilitiesBundle(ut_utils.BaseTestCase):
+
+    def test_flatten_bundle(self):
+        self.maxDiff = 1500
+        input_yaml = yaml.safe_load(TEST_BUNDLE_WITH_PLACEMENT)
+        flattened = bundle.remove_machine_specification(input_yaml)
+        expected = yaml.safe_load(TEST_BUNDLE_WITHOUT_PLACEMENT)
+
+        self.assertEqual(expected, flattened)
+
+    def test_add_series(self):
+        self.maxDiff = 1500
+        input_yaml = yaml.safe_load(TEST_BUNDLE_WITH_PLACEMENT)
+        input_yaml.pop('series', None)
+        flattened = bundle.remove_machine_specification(input_yaml)
+        expected = yaml.safe_load(TEST_BUNDLE_WITHOUT_PLACEMENT)
+
+        self.assertEqual(expected, flattened)

zaza/utilities/bundle.py

@@ -0,0 +1,74 @@
+# Copyright 2018 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Module for disfiguring Juju bundles."""
+
+
+import argparse
+import yaml
+import sys
+
+
+def remove_machine_specification(input_yaml):
+    """
+    Will remove the machien specifications from a supplied bundle.
+
+    :param input_yaml: Juju bundle to strip machinens from
+    :type input_yaml: dict
+    :returns: bundle without machine placements
+    :rtype: dict
+    """
+    machines = input_yaml.pop("machines", None)
+    if not input_yaml.get('series'):
+        if machines:
+            for (name, details) in machines.items():
+                if details['series']:
+                    input_yaml['series'] = details['series']
+                    break
+
+    for (application_name, application) in input_yaml['services'].items():
+        application.pop("to", None)
+    return input_yaml
+
+
+def parse_args(args):
+    """Parse command line arguments.
+
+    :param args: List of configure functions functions
+    :type list: [str1, str2,...] List of command line arguments
+    :returns: Parsed arguments
+    :rtype: Namespace
+    """
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-i', '--input',
+                        help='Bundle to flatten',
+                        required=True)
+    parser.add_argument('-o', '--output',
+                        help='Where to output',
+                        default="/dev/stdout")
+    return parser.parse_args(args)
+
+
+def main():
+    """Run the configuration defined by the command line args.
+
+    Run the configuration defined by the command line args or if none were
+    provided read the configuration functions  from the charms tests.yaml
+    config file
+    """
+    args = parse_args(sys.argv[1:])
+    with open(args.input, 'r') as file:
+        input_yaml = yaml.safe_load(file)
+    stripped_yaml = remove_machine_specification(input_yaml)
+    with open(args.output, 'w') as output:
+        print(yaml.dump(stripped_yaml), file=output)