Add configmap/secret hash functionality (#48)

* * * Add configmap/secret hash functionality

Signed-off-by: Alina Buzachis <abuzachis@redhat.com>

* * Add changelog fragment

Signed-off-by: Alina Buzachis <abuzachis@redhat.com>

plugins/module_utils/common.py

@@ -27,6 +27,7 @@ from datetime import datetime
 from distutils.version import LooseVersion
 
 from ansible_collections.kubernetes.core.plugins.module_utils.args_common import (AUTH_ARG_MAP, AUTH_ARG_SPEC)
+from ansible_collections.kubernetes.core.plugins.module_utils.hashes import generate_hash
 
 from ansible.module_utils.basic import AnsibleModule, missing_required_lib
 from ansible.module_utils.six import iteritems, string_types
@@ -60,7 +61,6 @@ except ImportError:
 
 K8S_CONFIG_HASH_IMP_ERR = None
 try:
-    from openshift.helper.hashes import generate_hash
     from openshift.dynamic.exceptions import KubernetesValidateMissing
     HAS_K8S_CONFIG_HASH = True
 except ImportError:

plugins/module_utils/hashes.py

@@ -0,0 +1,67 @@
+# Copyright [2017] [Red Hat, Inc.]
+#
+# 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.
+
+# Implement ConfigMapHash and SecretHash equivalents
+# Based on https://github.com/kubernetes/kubernetes/pull/49961
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import json
+import hashlib
+
+try:
+    import string
+    maketrans = string.maketrans
+except AttributeError:
+    maketrans = str.maketrans
+
+try:
+    from collections import OrderedDict
+except ImportError:
+    from orderreddict import OrderedDict
+
+
+def sorted_dict(unsorted_dict):
+    result = OrderedDict()
+    for (k, v) in sorted(unsorted_dict.items()):
+        if isinstance(v, dict):
+            v = sorted_dict(v)
+        result[k] = v
+    return result
+
+
+def generate_hash(resource):
+    # Get name from metadata
+    resource['name'] = resource.get('metadata', {}).get('name', '')
+    if resource['kind'] == 'ConfigMap':
+        marshalled = marshal(sorted_dict(resource), ['data', 'kind', 'name'])
+        del(resource['name'])
+        return encode(marshalled)
+    if resource['kind'] == 'Secret':
+        marshalled = marshal(sorted_dict(resource), ['data', 'kind', 'name', 'type'])
+        del(resource['name'])
+        return encode(marshalled)
+    raise NotImplementedError
+
+
+def marshal(data, keys):
+    ordered = OrderedDict()
+    for key in keys:
+        ordered[key] = data.get(key, "")
+    return json.dumps(ordered, separators=(',', ':')).encode('utf-8')
+
+
+def encode(resource):
+    return hashlib.sha256(resource).hexdigest()[:10].translate(maketrans("013ae", "ghkmt"))