I am trying to parse the given yang file and print all the leafs with their datatypes. Incase if the datatype is a derived datatype like – “oc-inet:domain-name”, I would like to look recursively into imported yang files and print the final base datatype of this derived datatype which is defined as

  typedef domain-name {
    type string {
      length "1..253";
      pattern
        '(((([a-zA-Z0-9_]([a-zA-Z0-9-_]){0,61})?[a-zA-Z0-9].)*' +
        '([a-zA-Z0-9_]([a-zA-Z0-9-_]){0,61})?[a-zA-Z0-9].?)'    +
        '|.)';
      oc-ext:posix-pattern
        '^(((([a-zA-Z0-9_]([a-zA-Z0-9-_]){0,61})?[a-zA-Z0-9].)*' +
        '([a-zA-Z0-9_]([a-zA-Z0-9-_]){0,61})?[a-zA-Z0-9].?)'    +
        '|.)$';
    }

In some cases, even these typedefs contains leafrefs like

  typedef network-instance-ref {
    type leafref {
      path "/oc-netinst:network-instances/oc-netinst:network-instance/" +
           "oc-netinst:config/oc-netinst:name";
    }
    description
      "A re-usable type that can be referenced within other
       modules that references a network instance.";
  }

Tried Pyang and some plugins etc, but couldnt achieve. I am sure this must have been already solved and some parsers are existing already. Can someone pls point me to tools/parsers that can achieve this?

Even in this link – https://openconfig.net/projects/models/schemadocs/jstree/openconfig-system.html, when i hover the mouse pointer over the derived datatype, it shows the base datatype.