code: func NewJSONConfigParser() *jsonconfig.ConfigParser {
  	var cp jsonconfig.ConfigParser
  	dir, err := PerkeepConfigDir()
  	if err != nil {
  		log.Fatalf("NewJSONConfigParser error: %v", err)
  	}
  	cp.IncludeDirs = append([]string{dir}, filepath.SplitList(os.Getenv("CAMLI_INCLUDE_PATH"))...)
  	return &cp
  }
docs: // NewJSONConfigParser returns a jsonconfig.ConfigParser with its IncludeDirs
  // set with PerkeepConfigDir and the contents of CAMLI_INCLUDE_PATH.