replace configure with attrdict

Change-Id: I226e9cd1fa44c9fe47490be7f781ab7030406cf3

requirements.txt

@@ -5,7 +5,6 @@
 pbr<2.0,>=1.3
 Babel>=1.3
 
-configure>=0.5
 lxml>=3.4.0
 paramiko>=1.14.0
 prettytable>=0.7.2
@@ -17,3 +16,4 @@ python-openstackclient>=0.4.1
 python-keystoneclient>=1.0.0
 scp>=0.8.0
 tabulate>=0.7.3
+attrdict>=2.0.0

vmtp/config.py

@@ -0,0 +1,49 @@
+# Copyright 2015 Cisco Systems, Inc.  All rights reserved.
+#
+#    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.
+#
+
+from attrdict import AttrDict
+import yaml
+
+with open('cfg.default.yaml') as fileobj:
+    settings = AttrDict(yaml.safe_load(fileobj))
+
+def config_load(file_name, from_cfg=None):
+    '''Load a yaml file into a config dict, merge with from_cfg if not None
+    The config file content taking precedence in case of duplicate
+    '''
+    with open(file_name) as fileobj:
+        cfg = AttrDict(yaml.safe_load(fileobj))
+    if from_cfg:
+        return from_cfg + cfg
+    return cfg
+
+def config_loads(cfg_text, from_cfg=None):
+    '''Same as config_load but load from a string
+    '''
+    try:
+        cfg = AttrDict(yaml.load(cfg_text))
+    except TypeError:
+        # empty string
+        cfg = AttrDict()
+    if from_cfg:
+        return from_cfg + cfg
+    return cfg
+
+def test_config():
+    cfg = config_load('a1.yaml')
+    cfg = config_load('a2.yaml', cfg)
+    cfg = config_loads('color: 500', cfg)
+    config_loads('')
+    config_loads('#')

vmtp/network.py

@@ -62,9 +62,9 @@ class Network(object):
                         break
                     if not self.ext_net:
                         self.ext_net = network
-                except KeyError:
+                except AttributeError:
                     ###############################################
-                    # A key error indicates, no user defined
+                    # A attribute error indicates, no user defined
                     # external network defined, so use the first one
                     ###############################################
                     self.ext_net = network

vmtp/vmtp.py

@@ -27,7 +27,8 @@ import traceback
 
 from __init__ import __version__
 import compute
-import configure
+from config import config_load
+from config import config_loads
 import credentials
 from glanceclient.v2 import client as glanceclient
 import iperf_tool
@@ -660,7 +661,7 @@ def parse_opts_from_cli():
                         help='override default values with a config file',
                         metavar='<config_file>')
 
-    parser.add_argument('-sc', '--show-config', dest='show_cofig',
+    parser.add_argument('-sc', '--show-config', dest='show_config',
                         default=False,
                         action='store_true',
                         help='print the default config')
@@ -794,29 +795,6 @@ def parse_opts_from_cli():
     return parser.parse_known_args()[0]
 
 def merge_opts_to_configs(opts):
-    def _merge_config(cfg_file, source_config, required=False):
-        '''
-        returns the merged config or exits if the file does not exist and is required
-        '''
-        dest_config = source_config
-
-        fullname = os.path.expanduser(cfg_file)
-        if os.path.isfile(fullname):
-            print('Loading ' + fullname + '...')
-            try:
-                alt_config = configure.Configuration.from_file(fullname).configure()
-                dest_config = source_config.merge(alt_config)
-
-            except configure.ConfigurationError:
-                # this is in most cases when the config file passed is empty
-                # configure.ConfigurationError: unconfigured
-                # in case of syntax error, another exception is thrown:
-                # TypeError: string indices must be integers, not str
-                pass
-        elif required:
-            print('Error: configration file %s does not exist' % (fullname))
-            sys.exit(1)
-        return dest_config
 
     default_cfg_file = resource_string(__name__, "cfg.default.yaml")
     # read the default configuration file and possibly an override config file
@@ -824,17 +802,18 @@ def merge_opts_to_configs(opts):
     # $HOME/.vmtp.yaml if exists
     # -c <file> from command line if provided
     # cfg.default.yaml
-    config = configure.Configuration.from_string(default_cfg_file).configure()
-    config = _merge_config('~/.vmtp.yaml', config)
+    config = config_loads(default_cfg_file)
+    local_cfg = os.path.expanduser('~/.vmtp.yaml')
+    if os.path.isfile(local_cfg):
+        config = config_load(local_cfg, config)
 
     if opts.config:
-        config = _merge_config(opts.config, config, required=True)
+        config = config_load(opts.config, config)
 
-    if opts.show_cofig:
+    if opts.show_config:
         print default_cfg_file
         sys.exit(0)
 
-
     if opts.version:
         print(__version__)
         sys.exit(0)