[cloud] Add ec2_vpc_dhcp_options_facts check mode (#23106)

* Support check mode in ec2_vpc_dhcp_options_facts

As a facts module, ec2_vpc_dhcp_options_facts supports check mode
by default

* ec2_vpc_dhcp_options_facts tidy up

Use named method imports, move imports to top of code
Use shared code to handle filters and tags
Use snake case for parameter names while retaining backward compatibility

lib/ansible/modules/cloud/amazon/ec2_vpc_dhcp_options_facts.py

@@ -34,12 +34,13 @@ options:
         See U(http://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeRouteTables.html) for possible filters.
     required: false
     default: null
-  DhcpOptionsIds:
+  dhcp_options_ids:
     description:
       - Get details of specific DHCP Option ID
       - Provide this value as a list
     required: false
     default: None
+    aliases: ['DhcpOptionsIds']
 extends_documentation_fragment:
     - aws
     - ec2
@@ -83,76 +84,63 @@ changed:
     returned: always
 '''
 
-import json
+import traceback
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.ec2 import ec2_argument_spec, boto3_conn, HAS_BOTO3
+from ansible.module_utils.ec2 import ansible_dict_to_boto3_filter_list, get_aws_connection_info
+from ansible.module_utils.ec2 import camel_dict_to_snake_dict, boto3_tag_list_to_ansible_dict
 
 try:
     import botocore
-    import boto3
-    HAS_BOTO3 = True
 except ImportError:
-    HAS_BOTO3 = False
+    pass  # caught by imported HAS_BOTO3
 
 
 def get_dhcp_options_info(dhcp_option):
     dhcp_option_info = {'DhcpOptionsId': dhcp_option['DhcpOptionsId'],
                         'DhcpConfigurations': dhcp_option['DhcpConfigurations'],
-                       'Tags': dhcp_option['Tags']
-               }
+                        'Tags': boto3_tag_list_to_ansible_dict(dhcp_option['Tags'])}
     return dhcp_option_info
 
 
 def list_dhcp_options(client, module):
-    dryrun = module.params.get("DryRun")
-    all_dhcp_options_array = []
-    params = dict()
-
-    if module.params.get('filters'):
-        params['Filters'] = []
-        for key, value in module.params.get('filters').items():
-            temp_dict = dict()
-            temp_dict['Name'] = key
-            if isinstance(value, basestring):
-                temp_dict['Values'] = [value]
-            else:
-                temp_dict['Values'] = value
-            params['Filters'].append(temp_dict)
-
-    if module.params.get("DryRun"):
-        params['DryRun'] = module.params.get("DryRun")
-
-    if module.params.get("DhcpOptionsIds"):
-        params['DhcpOptionsIds'] = module.params.get("DhcpOptionsIds")
+    params = dict(Filters=ansible_dict_to_boto3_filter_list(module.params.get('filters')))
+
+    if module.params.get("dry_run"):
+        params['DryRun'] = True
+
+    if module.params.get("dhcp_options_ids"):
+        params['DhcpOptionsIds'] = module.params.get("dhcp_options_ids")
 
     try:
         all_dhcp_options = client.describe_dhcp_options(**params)
     except botocore.exceptions.ClientError as e:
-        module.fail_json(msg=str(e))
-
-    for dhcp_option in all_dhcp_options['DhcpOptions']:
-        all_dhcp_options_array.append(get_dhcp_options_info(dhcp_option))
+        module.fail_json(msg=str(e), exception=traceback.format_exc(),
+                         **camel_dict_to_snake_dict(e.response))
 
-    snaked_dhcp_options_array = []
-    for dhcp_option in all_dhcp_options_array:
-        snaked_dhcp_options_array.append(camel_dict_to_snake_dict(dhcp_option))
+    results = [camel_dict_to_snake_dict(get_dhcp_options_info(option))
+               for option in all_dhcp_options['DhcpOptions']]
 
-    module.exit_json(dhcp_options=snaked_dhcp_options_array)
+    module.exit_json(dhcp_options=results)
 
 
 def main():
     argument_spec = ec2_argument_spec()
     argument_spec.update(
         dict(
-            filters = dict(type='dict', default=None, ),
-            DryRun = dict(type='bool', default=False),
-            DhcpOptionsIds = dict(type='list', default=None)
+            filters=dict(type='dict', default={}),
+            dry_run=dict(type='bool', default=False, aliases=['DryRun']),
+            dhcp_options_ids=dict(type='list', aliases=['DhcpOptionIds'])
         )
     )
 
-    module = AnsibleModule(argument_spec=argument_spec)
+    module = AnsibleModule(argument_spec=argument_spec,
+                           supports_check_mode=True)
 
     # Validate Requirements
     if not HAS_BOTO3:
-        module.fail_json(msg='json and botocore/boto3 is required.')
+        module.fail_json(msg='boto3 and botocore are required.')
 
     try:
         region, ec2_url, aws_connect_kwargs = get_aws_connection_info(module, boto3=True)
@@ -165,9 +153,6 @@ def main():
 
     module.exit_json(result=results)
 
-# import module snippets
-from ansible.module_utils.basic import *
-from ansible.module_utils.ec2 import *
 
 if __name__ == '__main__':
     main()

test/sanity/pep8/legacy-files.txt

@@ -174,7 +174,6 @@ lib/ansible/modules/cloud/amazon/ec2_tag.py
 lib/ansible/modules/cloud/amazon/ec2_vol.py
 lib/ansible/modules/cloud/amazon/ec2_vol_facts.py
 lib/ansible/modules/cloud/amazon/ec2_vpc_dhcp_options.py
-lib/ansible/modules/cloud/amazon/ec2_vpc_dhcp_options_facts.py
 lib/ansible/modules/cloud/amazon/ec2_vpc_igw.py
 lib/ansible/modules/cloud/amazon/ec2_vpc_nacl.py
 lib/ansible/modules/cloud/amazon/ec2_vpc_nacl_facts.py