adds module eos_banner (#20796)

* new module allows for configuration of eos multiline banners
* adds unit test cases for module

lib/ansible/modules/network/eos/eos_banner.py

@@ -0,0 +1,178 @@
+#!/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: eos_banner_
+version_added: "2.3"
+author: "Peter Sprygada (@privateip)"
+short_description: Manage multiline banners on Arista EOS devices
+description:
+  - This will configure both login and motd banners on remote devices
+    running Arista EOS.  It allows playbooks to add or remote
+    banner text from the active running configuration.
+notes:
+  - This module requires connection to be network_cli
+options:
+  banner:
+    description:
+      - The C(banner) argument specifies the banner that should be
+        configured on the remote device.  Current this module supports
+        configuration of either C(login) or C(motd) banners.
+    required: true
+    default: null
+  text:
+    description:
+      - The C(text) argument specifics the banner text that should be
+        present in the remote device running configuration.  This argument
+        accepts a multiline string.
+    required: false
+    default: null
+  state:
+    description:
+      - The C(state) argument specifies whether or not the configuration is
+        present in the current devices active running configuration.  When
+        this value is set to C(present), the configuration stanzas should be
+        in the current device configuration.  When this value is set to
+        C(absent), the configuration should not be in the current running
+        configuration.
+    required: false
+    default: present
+    choices: ['present', 'absent']
+"""
+
+EXAMPLES = """
+- name: configure the login banner
+  eos_banner:
+    banner: login
+    text: |
+      this is my login banner
+      that contains a multiline
+      string
+    state: present
+
+- name: remove the motd banner
+  banner: motd
+  state: absent
+"""
+
+RETURN = """
+commands:
+  description: The list of configuration mode commands to send to the device
+  returned: always
+  type: list
+  sample:
+    - banner login
+    - this is my login banner
+    - that contains a multiline
+    - string
+    - EOF
+session_name:
+  description: The EOS config session name used to load the configuration
+  returned: always
+  type: str
+  sample: ansible_1479315771
+start:
+  description: The time the job started
+  returned: always
+  type: str
+  sample: "2016-11-16 10:38:15.126146"
+end:
+  description: The time the job ended
+  returned: always
+  type: str
+  sample: "2016-11-16 10:38:25.595612"
+delta:
+  description: The time elapsed to perform all operations
+  returned: always
+  type: str
+  sample: "0:00:10.469466"
+"""
+from ansible.module_utils.local import LocalAnsibleModule
+from ansible.module_utils.eos import load_config, run_commands
+
+def map_obj_to_commands(updates, module):
+    commands = list()
+    want, have = updates
+    state = module.params['state']
+
+    if state == 'absent':
+        commands.append('no banner %s' % module.params['banner'])
+
+    elif state == 'present':
+        if want['text'] and (want['text'] != have.get('text')):
+            commands.append('banner %s' % module.params['banner'])
+            commands.extend(want['text'].strip().split('\n'))
+            commands.append('EOF')
+
+    return commands
+
+def map_config_to_obj(module):
+    output = run_commands(module, ['show banner %s' % module.params['banner']])
+    obj = {'banner': module.params['banner'], 'state': 'absent'}
+    if output:
+        obj['text'] = output
+        obj['state'] = 'present'
+    return obj
+
+def map_params_to_obj(module):
+    text = module.params['text']
+    if text:
+        text = str(text).strip()
+
+    return {
+        'banner': module.params['banner'],
+        'text': text,
+        'state': module.params['state']
+    }
+
+def main():
+    """ main entry point for module execution
+    """
+    argument_spec = dict(
+        banner=dict(required=True, choices=['login', 'motd']),
+        text=dict(),
+        state=dict(default='present', choices=['present', 'absent'])
+    )
+
+    required_if = [('state', 'present', ('text',))]
+
+    module = LocalAnsibleModule(argument_spec=argument_spec,
+                                required_if=required_if,
+                                supports_check_mode=True)
+
+    result = {'changed': False}
+
+    want = map_params_to_obj(module)
+    have = map_config_to_obj(module)
+
+    commands = map_obj_to_commands((want, have), module)
+    result['commands'] = commands
+
+    if commands:
+        commit = not module.check_mode
+        response = load_config(module, commands, commit=commit)
+        if response.get('diff') and module._diff:
+            result['diff'] = {'prepared': response.get('diff')}
+        result['session_name'] = response.get('session')
+        result['changed'] = True
+
+    module.exit_json(**result)
+
+if __name__ == '__main__':
+    main()