dnos9_template (New Module) (#4819)

* Added support for dnos9_template module

* Addressed @gundalow comments

lib/ansible/modules/network/dnos9/dnos9_template.py

@@ -0,0 +1,175 @@
+#!/usr/bin/python
+#
+# 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/>.
+#
+DOCUMENTATION = """
+---
+module: dnos9_template
+version_added: "2.2"
+author: "Dhivya P (@dhivyap)"
+short_description: Manage Dell OS9 device configurations over SSH.
+description:
+  - Manages Dell OS9 network device configurations over SSH.  This module
+    allows implementors to work with the device running-config.  It
+    provides a way to push a set of commands onto a network device
+    by evaluating the current running-config and only pushing configuration
+    commands that are not already configured.  The config source can
+    be a set of commands or a template.
+extends_documentation_fragment: dnos9
+options:
+  src:
+    description:
+      - The path to the config source.  The source can be either a
+        file with config or a template that will be merged during
+        runtime.  By default the task will first search for the source
+        file in role or playbook root folder in templates unless a full
+        path to the file is given.
+    required: true
+  force:
+    description:
+      - The force argument instructs the module not to consider the
+        current device running-config.  When set to true, this will
+        cause the module to push the contents of I(src) into the device
+        without first checking if already configured. This argument is
+        mutually exclusive with I(config).
+    required: false
+    default: false
+    choices: [ "true", "false" ]
+  backup:
+    description:
+      - When this argument is configured true, the module will backup
+        the running-config from the node prior to making any changes.
+        The backup file will be written to backup_{{ hostname }} in
+        the root of the playbook directory. This argument is
+        mutually exclusive with I(config).
+
+    required: false
+    default: false
+    choices: [ "true", "false" ]
+  config:
+    description:
+      - The module, by default, will connect to the remote device and
+        retrieve the current running-config to use as a base for comparing
+        against the contents of source.  There are times when it is not
+        desirable to have the task get the current running-config for
+        every task.  The I(config) argument allows the implementer to
+        pass in the configuration to use as the base config for
+        comparison. This argument is mutually exclusive with
+        I(force) and I(backup).
+
+    required: false
+    default: null
+"""
+
+EXAMPLES = """
+- name: push a configuration onto the device
+  dnos9_template:
+    host: hostname
+    username: foo
+    src: config.j2
+
+- name: forceable push a configuration onto the device
+  dnos9_template:
+    host: hostname
+    username: foo
+    src: config.j2
+    force: yes
+
+- name: provide the base configuration for comparison
+  dnos9_template:
+    host: hostname
+    username: foo
+    src: candidate_config.txt
+    config: current_config.txt
+"""
+
+RETURN = """
+updates:
+  description: The set of commands that will be pushed to the remote device
+  returned: always
+  type: list
+  sample: ['...', '...']
+
+_backup:
+  description: The current running config of the remote device.
+  returned: when running config is present in the remote device.
+  type: list
+  sample: ['...', '...']
+
+responses:
+  description: The set of responses from issuing the commands on the device
+  returned: when not check_mode
+  type: list
+  sample: ['...', '...']
+"""
+from ansible.module_utils.netcfg import NetworkConfig, dumps
+from ansible.module_utils.network import NetworkModule
+import ansible.module_utils.dnos9
+
+
+def get_config(module):
+    config = module.params['config'] or dict()
+    if not config and not module.params['force']:
+        config = module.config.get_config()
+    return config
+
+
+def main():
+    """ main entry point for module execution
+    """
+
+    argument_spec = dict(
+        src=dict(),
+        force=dict(default=False, type='bool'),
+        backup=dict(default=False, type='bool'),
+        config=dict(),
+    )
+
+    mutually_exclusive = [('config', 'backup'), ('config', 'force')]
+
+    module = NetworkModule(argument_spec=argument_spec,
+                           mutually_exclusive=mutually_exclusive,
+                           supports_check_mode=True)
+
+    result = dict(changed=False)
+
+    candidate = NetworkConfig(contents=module.params['src'], indent=1)
+
+    contents = get_config(module)
+
+    if contents:
+        config = NetworkConfig(contents=contents[0], indent=1)
+        result['_backup'] = contents[0]
+
+    commands = list()
+    if not module.params['force']:
+        commands = dumps(candidate.difference(config), 'commands')
+    else:
+        commands = str(candidate)
+
+    if commands:
+        commands = commands.split('\n')
+        if not module.check_mode:
+            response = module.config(commands)
+            result['responses'] = response
+        result['changed'] = True
+
+    result['updates'] = commands
+    module.exit_json(**result)
+
+
+if __name__ == '__main__':
+    main()