Add custom highlighting for the common FQCN names

Thanks to @gardar via pearofducks#136 for kicking this feature off!

Author: pearofducks

README.md

@@ -108,6 +108,15 @@ Accepts any syntax group name from `:help E669` - e.g. _Comment_, _Constant_, _I
 
 *Note:* Defaults to 'Structure' when not set.
 
+##### g:ansible_normal_keywords_highlight
+`let g:ansible_fqcn_highlight = 'Constant'`
+
+Accepts any syntax group name from `:help E669` - e.g. _Comment_, _Constant_, _Identifier_
+
+*Note:* Defaults to 'Statement' when not set.
+
+*Note:* The `.` in the FCQN can also be highlighted via a modification to a [Vim syntax internal](https://stackoverflow.com/questions/69781626/how-to-do-syntax-highlighting-for-a-keyword-containing-a-period). This plugin will not do this automatically.
+
 ##### g:ansible_normal_keywords_highlight
 `let g:ansible_normal_keywords_highlight = 'Constant'`
 

syntax/ansible.vim

@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language: Ansible YAML/Jinja templates
 " Maintainer: Dave Honneffer <[email protected]>
-" Last Change: 2018.02.08
+" Last Change: 2023.10.29
 
 if !exists("main_syntax")
   let main_syntax = 'yaml'
@@ -99,6 +99,13 @@ if exists("g:ansible_extra_keywords_highlight")
   endif
 endif
 
+execute 'syn keyword ansible_fqcn_keywords ansible builtin ansible.builtin. containedin='.s:yamlKey.' contained'
+if exists("g:ansible_fqcn_highlight")
+  execute 'highlight link ansible_fqcn_keywords '.g:ansible_fqcn_highlight
+else
+  highlight default link ansible_fqcn_keywords Statement
+endif
+
 execute 'syn keyword ansible_normal_keywords
             \ include include_role include_tasks include_vars import_role import_playbook import_tasks
             \ when changed_when failed_when block rescue always notify listen register