update ops_config module with new enhancements

* add src argument to provide path to config file
* add new choice to match used to ignore current running config
* add update argument with choices merge or check
* add backup argument to backup current running config to control host
* add save argument to save current running config to startup config
* add state argument to control state of config file
* deprecated force argument, use match=none instead

Note: this module only supports transport=cli

Tested on OpenSwitch 0.4.0

network/openswitch/ops_config.py

@@ -20,7 +20,7 @@ DOCUMENTATION = """
 ---
 module: ops_config
 version_added: "2.1"
-author: "Peter sprygada (@privateip)"
+author: "Peter Sprygada (@privateip)"
 short_description: Manage OpenSwitch configuration using CLI
 description:
   - OpenSwitch configurations use a simple block indent file syntax
@@ -36,7 +36,8 @@ options:
         in the device running-config.  Be sure to note the configuration
         command syntax as some commands are automatically modified by the
         device config parser.
-    required: true
+    required: false
+    default: null
   parents:
     description:
       - The ordered set of parents that uniquely identify the section
@@ -45,6 +46,17 @@ options:
         level or global commands.
     required: false
     default: null
+  src:
+    description:
+      - The I(src) argument provides a path to the configuration file
+        to load into the remote system.  The path can either be a full
+        system path to the configuration file if the value starts with /
+        or relative to the root of the implemented role or playbook.
+        This arugment is mutually exclusive with the I(lines) and
+        I(parents) arguments.
+    required: false
+    default: null
+    version_added: "2.2"
   before:
     description:
       - The ordered set of commands to push on to the command stack if
@@ -72,7 +84,7 @@ options:
         must be an equal match.
     required: false
     default: line
-    choices: ['line', 'strict', 'exact']
+    choices: ['line', 'strict', 'exact', 'none']
   replace:
     description:
       - Instructs the module on the way to perform the configuration
@@ -90,9 +102,25 @@ options:
         current devices 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.
+      - Note this argument should be considered deprecated.  To achieve
+        the equivalent, set the match argument to none.  This argument
+        will be removed in a future release.
     required: false
     default: false
-    choices: ['true', 'false']
+    choices: ['yes', 'no']
+  update:
+    description:
+      - The I(update) argument controls how the configuration statements
+        are processed on the remote device.  Valid choices for the I(update)
+        argument are I(merge) I(replace) and I(check).  When the argument is
+        set to I(merge), the configuration changes are merged with the current
+        device running configuration.  When the argument is set to I(check)
+        the configuration updates are determined but not actually configured
+        on the remote device.
+    required: false
+    default: merge
+    choices: ['merge', 'check']
+    version_added: "2.2"
   config:
     description:
       - The module, by default, will connect to the remote device and
@@ -104,20 +132,55 @@ options:
         config for comparison.
     required: false
     default: null
+  save:
+    description:
+      - The C(save) argument instructs the module to save the running-
+        config to the startup-config at the conclusion of the module
+        running.  If check mode is specified, this argument is ignored.
+    required: false
+    default: no
+    choices: ['yes', 'no']
+    version_added: "2.2"
+  state:
+    description:
+      - This argument specifies whether or not the running-config is
+        present on the remote device.  When set to I(absent) the
+        running-config on the remote device is erased.
+    required: false
+    default: no
+    choices: ['yes', 'no']
+    version_added: "2.2"
 """
 
 EXAMPLES = """
+# Note: examples below use the following provider dict to handle
+#       transport and authentication to the node.
+vars:
+  cli:
+    host: "{{ inventory_hostname }}"
+    username: netop
+    password: netop
+
 - name: configure hostname over cli
   ops_config:
-  lines:
+    lines:
-    - "hostname {{ inventory_hostname }}"
+      - "hostname {{ inventory_hostname }}"
+    provider: "{{ cli }}"
+
 
 - name: configure vlan 10 over cli
   ops_config:
-  lines:
+    lines:
-    - no shutdown
+      - no shutdown
-  parents:
+    parents:
-    - vlan 10
+      - vlan 10
+    provider: "{{ cli }}"
+
+- name: load config from file
+  ops_config:
+    src: ops01.cfg
+    backup: yes
+    provider: "{{ cli }}"
 """
 
 RETURN = """
@@ -126,122 +189,166 @@ updates:
   returned: always
   type: list
   sample: ['...', '...']
-
+backup_path:
+  description: The full path to the backup file
+  returned: when backup is yes
+  type: path
+  sample: /playbooks/ansible/backup/ios_config.2016-07-16@22:28:34
 responses:
   description: The set of responses from issuing the commands on the device
-  retured: when not check_mode
+  returned: when not check_mode
   type: list
   sample: ['...', '...']
 """
 import re
-import itertools
 
-def get_config(module):
+from ansible.module_utils.basic import get_exception
-    config = module.params['config'] or dict()
+from ansible.module_utils.openswitch import NetworkModule, NetworkError
-    if not config and not module.params['force']:
+from ansible.module_utils.netcfg import NetworkConfig, dumps
-        config = module.config
+from ansible.module_utils.netcli import Command
-    return config
 
+def invoke(name, *args, **kwargs):
+    func = globals().get(name)
+    if func:
+        return func(*args, **kwargs)
 
-def build_candidate(lines, parents, config, strategy):
+def check_args(module, warnings):
-    candidate = list()
+    if module.params['parents']:
+        if not module.params['lines'] or module.params['src']:
+            warnings.append('ignoring unnecessary argument parents')
+    if module.params['force']:
+        warnings.append('The force argument is deprecated, please use '
+                        'match=none instead.  This argument will be '
+                        'removed in the future')
 
-    if strategy == 'strict':
+def get_config(module, result):
-        for index, cmd in enumerate(lines):
+    contents = module.params['config']
-            try:
+    if not contents:
-                if cmd != config[index]:
+        contents = module.config.get_config()
-                    candidate.append(cmd)
+    return NetworkConfig(indent=4, contents=contents)
-            except IndexError:
-                candidate.append(cmd)
-
-    elif strategy == 'exact':
-        if len(lines) != len(config):
-            candidate = list(lines)
-        else:
-            for cmd, cfg in itertools.izip(lines, config):
-                if cmd != cfg:
-                    candidate = list(lines)
-                    break
-
-    else:
-        for cmd in lines:
-            if cmd not in config:
-                candidate.append(cmd)
 
+def get_candidate(module):
+    candidate = NetworkConfig(indent=4)
+    if module.params['src']:
+        candidate.load(module.params['src'])
+    elif module.params['lines']:
+        parents = module.params['parents'] or list()
+        candidate.add(module.params['lines'], parents=parents)
     return candidate
 
+def load_backup(module):
+    try:
+        module.cli(['exit', 'config replace flash:/ansible-rollback force'])
+    except NetworkError:
+        module.fail_json(msg='unable to rollback configuration')
+
+def backup_config(module):
+    cmd = 'copy running-config flash:/ansible-rollback'
+    cmd = Command(cmd, prompt=re.compile('\? $'), response='\n')
+    module.cli(cmd)
+
+def load_config(module, commands, result):
+    if not module.check_mode and module.params['update'] != 'check':
+        module.config(commands)
+    result['changed'] = module.params['update'] != 'check'
+    result['updates'] = commands.split('\n')
+
+def present(module, result):
+    match = module.params['match']
+    replace = module.params['replace']
+
+    candidate = get_candidate(module)
+
+    if match != 'none':
+        config = get_config(module, result)
+        configobjs = candidate.difference(config, match=match, replace=replace)
+    else:
+        config = None
+        configobjs = candidate.items
+
+    if configobjs:
+        commands = dumps(configobjs, 'commands')
+
+        if module.params['before']:
+            commands[:0] = module.params['before']
+
+        if module.params['after']:
+            commands.extend(module.params['after'])
+
+        # send the configuration commands to the device and merge
+        # them with the current running config
+        load_config(module, commands, result)
+
+    if module.params['save'] and not module.check_mode:
+        module.config.save_config()
+
+def absent(module, result):
+    if not module.check_mode:
+        module.cli('erase startup-config')
+    result['changed'] = True
 
 def main():
 
     argument_spec = dict(
-        lines=dict(aliases=['commands'], required=True, type='list'),
+        lines=dict(aliases=['commands'], type='list'),
         parents=dict(type='list'),
+
+        src=dict(type='path'),
+
         before=dict(type='list'),
         after=dict(type='list'),
-        match=dict(default='line', choices=['line', 'strict', 'exact']),
+
+        match=dict(default='line', choices=['line', 'strict', 'exact', 'none']),
         replace=dict(default='line', choices=['line', 'block']),
+
+        # this argument is deprecated in favor of setting match: none
+        # it will be removed in a future version
         force=dict(default=False, type='bool'),
+
+        update=dict(choices=['merge', 'check'], default='merge'),
+        backup=dict(type='bool', default=False),
+
         config=dict(),
+        default=dict(type='bool', default=False),
+
+        save=dict(type='bool', default=False),
+
+        state=dict(choices=['present', 'absent'], default='present'),
+
+        # ops_config is only supported over Cli transport so force
+        # the value of transport to be cli
         transport=dict(default='cli', choices=['cli'])
     )
 
-    module = get_module(argument_spec=argument_spec,
+    mutually_exclusive = [('lines', 'src')]
-                         supports_check_mode=True)
 
-    lines = module.params['lines']
+    module = NetworkModule(argument_spec=argument_spec,
-    parents = module.params['parents'] or list()
+                           connect_on_load=False,
+                           mutually_exclusive=mutually_exclusive,
+                           supports_check_mode=True)
 
-    before = module.params['before']
+    state = module.params['state']
-    after = module.params['after']
 
-    match = module.params['match']
+    if module.params['force'] is True:
-    replace = module.params['replace']
+        module.params['match'] = 'none'
 
-    contents = get_config(module)
+    warnings = list()
-    config = module.parse_config(contents)
+    check_args(module, warnings)
 
-    if parents:
+    result = dict(changed=False, warnings=warnings)
-        for parent in parents:
-            for item in config:
-                if item.text == parent:
-                    config = item
 
-        try:
+    if module.params['backup']:
-            children = [c.text for c in config.children]
+        result['__backup__'] = module.config.get_config()
-        except AttributeError:
-            children = [c.text for c in config]
 
-    else:
+    try:
-        children = [c.text for c in config if not c.parents]
+        invoke(state, module, result)
+    except NetworkError:
+        exc = get_exception()
+        module.fail_json(msg=str(exc))
 
-    result = dict(changed=False)
+    module.exit_json(**result)
 
-    candidate = build_candidate(lines, parents, children, match)
 
-    if candidate:
-        if replace == 'line':
-            candidate[:0] = parents
-        else:
-            candidate = list(parents)
-            candidate.extend(lines)
-
-        if before:
-            candidate[:0] = before
-
-        if after:
-            candidate.extend(after)
-
-        if not module.check_mode:
-            response = module.configure(candidate)
-            result['responses'] = response
-        result['changed'] = True
-
-    result['updates'] = candidate
-    return module.exit_json(**result)
-
-from ansible.module_utils.basic import *
-from ansible.module_utils.shell import *
-from ansible.module_utils.netcfg import *
-from ansible.module_utils.openswitch import *
 if __name__ == '__main__':
     main()
+