+var opt_repo = new OptionString("Repository (e.g. nitlang/nit)", "-r", "--repo")
+var opt_auth = new OptionString("OAuth token", "--auth")
+var opt_query = new OptionString("Query to get issues (e.g. label=ok_will_merge)", "-q", "--query")
+var opt_keepgoing = new OptionBool("Skip merge conflicts", "-k", "--keep-going")
+var opts = new OptionContext
+opts.add_option(opt_repo, opt_auth, opt_query, opt_keepgoing)