Fix diff_ignore_lines option issue for candidate configuration (#45201)

* Fix diff_ignore_lines option issue for candidate configuration

*  diff_ignore_lines option is to handle the running config fetch from
   remote host and ignore the lines that are auto updated eg: commit time and date
*  This option should not be used while processing candidate (input) configuration

* Fix review comment

lib/ansible/plugins/cliconf/eos.py

@@ -214,7 +214,7 @@ class Cliconf(CliconfBase):
             raise ValueError("'replace' value %s in invalid, valid values are %s" % (diff_replace, ', '.join(option_values['diff_replace'])))
 
         # prepare candidate configuration
-        candidate_obj = NetworkConfig(indent=3, ignore_lines=diff_ignore_lines)
+        candidate_obj = NetworkConfig(indent=3)
         candidate_obj.load(candidate)
 
         if running and diff_match != 'none' and diff_replace != 'config':

lib/ansible/plugins/cliconf/ios.py

@@ -105,7 +105,7 @@ class Cliconf(CliconfBase):
             raise ValueError("'replace' value %s in invalid, valid values are %s" % (diff_replace, ', '.join(option_values['diff_replace'])))
 
         # prepare candidate configuration
-        candidate_obj = NetworkConfig(indent=1, ignore_lines=diff_ignore_lines)
+        candidate_obj = NetworkConfig(indent=1)
         want_src, want_banners = self._extract_banners(candidate)
         candidate_obj.load(want_src)
 

lib/ansible/plugins/cliconf/iosxr.py

@@ -132,7 +132,7 @@ class Cliconf(CliconfBase):
 
         # prepare candidate configuration
         sanitized_candidate = sanitize_config(candidate)
-        candidate_obj = NetworkConfig(indent=1, ignore_lines=diff_ignore_lines)
+        candidate_obj = NetworkConfig(indent=1)
         candidate_obj.load(sanitized_candidate)
 
         if running and diff_match != 'none':

lib/ansible/plugins/cliconf/nxos.py

@@ -115,7 +115,7 @@ class Cliconf(CliconfBase):
             raise ValueError("'replace' value %s in invalid, valid values are %s" % (diff_replace, ', '.join(option_values['diff_replace'])))
 
         # prepare candidate configuration
-        candidate_obj = NetworkConfig(indent=2, ignore_lines=diff_ignore_lines)
+        candidate_obj = NetworkConfig(indent=2)
         candidate_obj.load(candidate)
 
         if running and diff_match != 'none' and diff_replace != 'config':

test/integration/targets/ios_config/tests/cli/src_basic.yaml

@@ -37,4 +37,34 @@
 # FIXME Bug https://github.com/ansible/ansible/issues/19382
 #      - "result.updates is not defined"
 
+- name: check for empty diff
+  ios_config:
+    running_config: |
+      service timestamps debug datetime msec
+      service timestamps log datetime msec
+    lines:
+      - service timestamps debug datetime msec
+      - service timestamps log datetime msec
+  check_mode: True
+  register: result
+- assert:
+    that:
+      - "result.updates is undefined"
+
+- name: check for diff with ignore lines for running config
+  ios_config:
+    running_config: |
+      service timestamps debug datetime msec
+      service timestamps log datetime msec
+    lines:
+      - service timestamps debug datetime msec
+      - service timestamps log datetime msec
+    diff_ignore_lines: service timestamps log datetime msec
+  check_mode: True
+  register: result
+
+- assert:
+    that:
+      - "'service timestamps log datetime msec' in result.updates"
+
 - debug: msg="END cli/src_basic.yaml on connection={{ ansible_connection }}"