Add api_key lookup

- Add api_key lookup to wrapper.py
  - Use api_key if provided
  - Use value of CICO_API_KEY
  - Use contents of ~/.duffy.key
  - Use contents of ~/duffy.key

- Update ansible module to simply default to None and use lookup from
wrapper

- Update shell.py to default to None and use lookup from wrapper.

cicoclient/ansible/cico.py

@@ -62,7 +62,7 @@
     api_key:
         description:
             - API key
-        default: CICO_API_KEY environment variable or None
+        default: CICO_API_KEY environment variable, the contents of ~/.duffy.key, the contents of ~/duffy.key, or None
     ssid:
         description:
             - SessionID, required with action 'done', optional with 'list'.
@@ -125,7 +125,6 @@
     api_key: 723ef3ce-4ea4-4e8d-9c8a-20a8249b2955
     ssid: 3e03553f-ae28-4a68-b879-f0fdbf949d5d
 '''
-import os
 try:
     from cicoclient.wrapper import CicoWrapper
     HAS_CICO = True
@@ -146,7 +145,7 @@ def main():
         retry_count=dict(default=1, type='int'),
         retry_interval=dict(default=10, type='int'),
         endpoint=dict(default='http://admin.ci.centos.org:8080/'),
-        api_key=dict(default=os.getenv('CICO_API_KEY', None), no_log=True),
+        api_key=dict(default=None, no_log=True),
         ssid=dict(default=None),
     )
     module = AnsibleModule(argument_spec)
@@ -165,10 +164,6 @@ def main():
     ssid = module.params['ssid']
     flavor = module.params['flavor']
 
-    # Pre-flight validation
-    if api_key is None:
-        module.fail_json(msg='An API key is required for this module.')
-
     if action == 'done' and ssid is None:
         module.fail_json(msg='A SSID is required when releasing nodes.')
 
@@ -178,6 +173,9 @@ def main():
             api_key=api_key
         )
 
+        if api.api_key is None:
+            module.fail_json(msg='An API key is required for this module.')
+
         if action == 'get':
             hosts, new_ssid = api.node_get(arch=arch, ver=release, count=count,
                                            retry_count=retry_count,

cicoclient/cli.py

@@ -14,7 +14,6 @@
 #
 
 import logging
-import sys
 
 from cliff.lister import Lister
 from cicoclient.wrapper import CicoWrapper

cicoclient/shell.py

@@ -47,9 +47,11 @@ def build_option_parser(self, description, version):
         parser.add_argument(
             '--api-key',
             metavar='<api-key>',
-            help='API key to admin.ci.centos.org service. Defaults to'
-                 ' environment variable for CICO_API_KEY.',
-            default=os.getenv('CICO_API_KEY', None)
+            help='API key to admin.ci.centos.org service. If not provided the'
+                 ' value of the CICO_API_KEY environment variable will be used'
+                 ' if defined, followed by the contents of ~/.duffy.key if'
+                 ' present, finally the contents of ~/duffy.key if present.',
+            default=None
         )
 
         return parser

cicoclient/wrapper.py

@@ -13,6 +13,7 @@
 #   under the License.
 #
 
+import os
 import time
 
 import cicoclient.client as client
@@ -27,12 +28,27 @@ class CicoWrapper(client.CicoClient):
     def __init__(self, **params):
         super(CicoWrapper, self).__init__(**params)
         self.user_agent = 'python-cicoclient-wrapper'
+        self.api_key = self._lookup_api_key(params.get('api_key'))
+
+        self._full_inventory = self._self_inventory = None
+
+    @staticmethod
+    def _lookup_api_key(api_key):
+        if api_key is not None:
+            return api_key
+
         try:
-            self.api_key = params['api_key']
+            return os.environ['CICO_API_KEY']
         except KeyError:
-            self.api_key = None
+            pass
 
-        self._full_inventory = self._self_inventory = None
+        for key_file in ('~/.duffy.key', '~/duffy.key'):
+            try:
+                return open(os.path.expanduser(key_file)).read().strip()
+            except IOError:
+                pass
+
+        return None
 
     @property
     def full_inventory(self):