adds new iosxr shared module for developing modules that work with IOS XR devices

This commit adds a new shared module for working with Cisco IOS XR devices over
CLI (SSH).  It also provides a documentation fragement for the commmon arguments
provided by the iosxr module.

lib/ansible/module_utils/iosxr.py

@@ -0,0 +1,121 @@
+#
+# (c) 2015 Peter Sprygada, <psprygada@ansible.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+NET_PASSWD_RE = re.compile(r"[\r\n]?password: $", re.I)
+
+NET_COMMON_ARGS = dict(
+    host=dict(required=True),
+    port=dict(default=22, type='int'),
+    username=dict(required=True),
+    password=dict(no_log=True)
+)
+
+def to_list(val):
+    if isinstance(val, (list, tuple)):
+        return list(val)
+    elif val is not None:
+        return [val]
+    else:
+        return list()
+
+class Cli(object):
+
+    def __init__(self, module):
+        self.module = module
+        self.shell = None
+
+    def connect(self, **kwargs):
+        host = self.module.params['host']
+        port = self.module.params['port'] or 22
+
+        username = self.module.params['username']
+        password = self.module.params['password']
+
+        self.shell = Shell()
+        self.shell.open(host, port=port, username=username, password=password)
+
+    def send(self, commands):
+        return self.shell.send(commands)
+
+class IosxrModule(AnsibleModule):
+
+    def __init__(self, *args, **kwargs):
+        super(IosxrModule, self).__init__(*args, **kwargs)
+        self.connection = None
+        self._config = None
+
+    @property
+    def config(self):
+        if not self._config:
+            self._config = self.get_config()
+        return self._config
+
+    def connect(self):
+        try:
+            self.connection = Cli(self)
+            self.connection.connect()
+            self.execute('terminal length 0')
+        except Exception, exc:
+            self.fail_json(msg=exc.message)
+
+    def configure(self, commands):
+        commands = to_list(commands)
+        commands.insert(0, 'configure terminal')
+        commands.append('commit')
+        responses = self.execute(commands)
+        responses.pop(0)
+        responses.pop()
+        return responses
+
+    def execute(self, commands, **kwargs):
+        return self.connection.send(commands)
+
+    def disconnect(self):
+        self.connection.close()
+
+    def parse_config(self, cfg):
+        return parse(cfg, indent=1)
+
+    def get_config(self):
+        return self.execute('show running-config')[0]
+
+def get_module(**kwargs):
+    """Return instance of IosxrModule
+    """
+
+    argument_spec = NET_COMMON_ARGS.copy()
+    if kwargs.get('argument_spec'):
+        argument_spec.update(kwargs['argument_spec'])
+    kwargs['argument_spec'] = argument_spec
+    kwargs['check_invalid_arguments'] = False
+
+    module = IosxrModule(**kwargs)
+
+    if not HAS_PARAMIKO:
+        module.fail_json(msg='paramiko is required but does not appear to be installed')
+
+    # copy in values from local action.
+    params = json_dict_unicode_to_bytes(json.loads(MODULE_COMPLEX_ARGS))
+    for key, value in params.iteritems():
+        module.params[key] = value
+
+    module.connect()
+
+    return module
+

lib/ansible/utils/module_docs_fragments/iosxr.py

@@ -0,0 +1,52 @@
+#
+# (c) 2015, Peter Sprygada <psprygada@ansible.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+
+class ModuleDocFragment(object):
+
+    # Standard files documentation fragment
+    DOCUMENTATION = """
+options:
+  host:
+    description:
+      - Specifies the DNS host name or address for connecting to the remote
+        device over the specified transport.  The value of host is used as
+        the destination address for the transport.
+    required: true
+  port:
+    description:
+      - Specifies the port to use when buiding the connection to the remote
+        device.  The port value will default to the well known SSH port
+        of 22
+    required: false
+    default: 22
+  username:
+    description:
+      - Configures the usename to use to authenticate the connection to
+        the remote device.  The value of I(username) is used to authenticate
+        the SSH session
+    required: true
+  password:
+    description:
+      - Specifies the password to use when authentication the connection to
+        the remote device.   The value of I(password) is used to authenticate
+        the SSH session
+    required: false
+    default: null
+
+  """