OOF design framework seed code

Issue-ID: OPTFRA-18
Change-Id: Ib44b06f7184cb49f90d5936edd82cba44068b1c8
Signed-off-by: Sastry Isukapalli <sastry@research.att.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/config/loader.py b/config/loader.py
new file mode 100644
index 0000000..7cb363a
--- /dev/null
+++ b/config/loader.py
@@ -0,0 +1,51 @@
+# -------------------------------------------------------------------------
+#   Copyright (c) 2015-2017 AT&T Intellectual Property
+#
+#   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 json
+
+import yaml
+
+
+def load_config_file(config_file: str, child_name="dockerConfiguration") -> dict:
+    """
+    Load OSDF configuration from a file -- currently only yaml/json are supported
+    :param config_file:  path to config file (.yaml or .json).
+    :param child_name: if present, return only that child node
+    :return: config (all or specific child node)
+    """
+    with open(config_file, 'r') as fid:
+        res = {}
+        if config_file.endswith(".yaml"):
+            res = yaml.load(fid)
+        elif config_file.endswith(".json") or config_file.endswith("json"):
+            res = json.load(fid)
+    return res.get(child_name, res) if child_name else res
+
+
+def dcae_config(config_file: str) -> dict:
+    return load_config_file(config_file, child_name="dockerConfiguration")
+
+
+def all_configs(**kwargs: dict) -> dict:
+    """
+    Load all specified configurations
+    :param config_file_spec: key-value pairs
+           (e.g. { "core": "common_config.yaml", "deployment": "/tmp/1452523532json" })
+    :return: merged config as a nested dictionary
+    """
+    return {k: load_config_file(fname) for k, fname in kwargs.items()}