Accessing current iterated dict key name and key values with Mustache in CFEngine

README.org

• @ Renders the currently iterated key
• . Accesses a value

  So, if you are iterating over the dict aliases which is a dict of dicts:

  {
      "aliases": {
          "key1": {
              "msg": "Hello from 1",
              "msg2": "Hello2 from 1"
          },
          "key2": {
              "msg": "Hello from 2",
              "msg2": "Hello2 from 2"
          }
      }
  }
      

You could do this:

bundle agent __main__
{
  vars:
      "d" data => '{
  "aliases": {
    "key1": {
      "msg": "Hello from 1", 
      "msg2": "Hello2 from 1" 
    },
    "key2": {
      "msg": "Hello from 2", 
      "msg2": "Hello2 from 2" 
    }
  }
}';

  reports:
       "$(with)"
         with => string_mustache( "$(const.n){{#aliases}} {{@}}:$(const.t){{.msg}}|{{{.msg2}}}$(const.n){{/aliases}}", d );


}

R: 
 key1:	Hello from 1|Hello2 from 1
 key2:	Hello from 2|Hello2 from 2