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55 lines
1.6 KiB
55 lines
1.6 KiB
/** internal
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* class MutuallyExclusiveGroup
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*
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* Group arguments.
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* By default, ArgumentParser groups command-line arguments
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* into “positional arguments” and “optional arguments”
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* when displaying help messages. When there is a better
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* conceptual grouping of arguments than this default one,
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* appropriate groups can be created using the addArgumentGroup() method
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*
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* This class inherited from [[ArgumentContainer]]
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**/
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'use strict';
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var util = require('util');
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var ArgumentGroup = require('./group');
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/**
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* new MutuallyExclusiveGroup(container, options)
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* - container (object): main container
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* - options (object): options.required -> true/false
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*
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* `required` could be an argument itself, but making it a property of
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* the options argument is more consistent with the JS adaptation of the Python)
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**/
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var MutuallyExclusiveGroup = module.exports = function MutuallyExclusiveGroup(container, options) {
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var required;
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options = options || {};
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required = options.required || false;
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ArgumentGroup.call(this, container);
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this.required = required;
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};
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util.inherits(MutuallyExclusiveGroup, ArgumentGroup);
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MutuallyExclusiveGroup.prototype._addAction = function (action) {
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var msg;
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if (action.required) {
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msg = 'mutually exclusive arguments must be optional';
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throw new Error(msg);
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}
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action = this._container._addAction(action);
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this._groupActions.push(action);
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return action;
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};
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MutuallyExclusiveGroup.prototype._removeAction = function (action) {
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this._container._removeAction(action);
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this._groupActions.remove(action);
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};
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