4 * Support action for printing program version
5 * This class inherited from [[Action]]
9 var util = require('util');
11 var Action = require('../action');
16 var c = require('../const');
19 * new ActionVersion(options)
20 * - options (object): options hash see [[Action.new]]
23 var ActionVersion = module.exports = function ActionVersion(options) {
24 options = options || {};
25 options.defaultValue = (options.defaultValue ? options.defaultValue : c.SUPPRESS);
26 options.dest = (options.dest || c.SUPPRESS);
28 this.version = options.version;
29 Action.call(this, options);
31 util.inherits(ActionVersion, Action);
34 * ActionVersion#call(parser, namespace, values, optionString) -> Void
35 * - parser (ArgumentParser): current parser
36 * - namespace (Namespace): namespace for output data
37 * - values (Array): parsed values
38 * - optionString (Array): input option string(not parsed)
40 * Print version and exit
42 ActionVersion.prototype.call = function (parser) {
43 var version = this.version || parser.version;
44 var formatter = parser._getFormatter();
45 formatter.addText(version);
46 parser.exit(0, formatter.formatHelp());