var opt_keep = new OptionBool("Ignore errors and files that are not a Nit source file", "-k", "--keep")
var opt_recursive = new OptionBool("Process directories recussively", "-r", "--recursive")
var opt_tree = new OptionBool("List source files in their groups and projects", "-t", "--tree")
var opt_source = new OptionBool("List source files", "-s", "--source")
var opt_keep = new OptionBool("Ignore errors and files that are not a Nit source file", "-k", "--keep")
var opt_recursive = new OptionBool("Process directories recussively", "-r", "--recursive")
var opt_tree = new OptionBool("List source files in their groups and projects", "-t", "--tree")
var opt_source = new OptionBool("List source files", "-s", "--source")