text: #!/usr/bin/env python3
  
  from pygments.lexers import get_all_lexers
  import json
  import os
  
  ZULIP_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), '../../')
  DATA_PATH = os.path.join(ZULIP_PATH, 'tools', 'setup', 'lang.json')
  JS_PATH = os.path.join(ZULIP_PATH, 'static', 'generated', 'pygments_data.js')
  
  with open(DATA_PATH) as f:
      langs = json.load(f)
  
  lexers = get_all_lexers()
  for lexer in lexers:
      for name in lexer[1]:
          if name not in langs:
              langs[name] = 0
  
  template = '''var pygments_data = (function () {
  
  var exports = {};
  
  exports.langs = %s;
  
  return exports;
  
  }());
  if (typeof module !== 'undefined') {
      module.exports = pygments_data;
  }''' % json.dumps(langs)
  
  with open(JS_PATH, 'w') as f:
      f.write(template)
  