docs: def ldd_deps(filename, ret=None):
      '''
      Recurse through a set of dependencies reported by ``ldd``, to find
      associated dependencies.
  
      Please note that this does not necessarily resolve all (non-package)
      dependencies for a file; but it does help.
  
      CLI Example:
  
          salt myminion genesis.ldd_deps bash
          salt myminion genesis.ldd_deps /bin/bash
      '''
      if not os.path.exists(filename):
          filename = salt.utils.path.which(filename)
  
      if ret is None:
          ret = []
  
      out = __salt__['cmd.run'](('ldd', filename), python_shell=False)
      for line in out.splitlines():
          if not line.strip():
              continue
          dep_path = ''
          if '=>' in line:
              comps = line.split(' => ')
              dep_comps = comps[1].strip().split()
              if os.path.exists(dep_comps[0]):
                  dep_path = dep_comps[0]
          else:
              dep_comps = line.strip().split()
              if os.path.exists(dep_comps[0]):
                  dep_path = dep_comps[0]
  
          if dep_path:
              if dep_path not in ret:
                  ret.append(dep_path)
                  new_deps = ldd_deps(dep_path, ret)
                  for dep in new_deps:
                      if dep not in ret:
                          ret.append(dep)
  
      return ret