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