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54 lines
1.5 KiB
JavaScript
54 lines
1.5 KiB
JavaScript
/*:nodoc:*
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* class ActionAppend
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*
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* This action stores a list, and appends each argument value to the list.
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* This is useful to allow an option to be specified multiple times.
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* This class inherided from [[Action]]
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*
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**/
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'use strict';
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var util = require('util');
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var Action = require('../action');
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// Constants
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var c = require('../const');
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/*:nodoc:*
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* new ActionAppend(options)
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* - options (object): options hash see [[Action.new]]
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*
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* Note: options.nargs should be optional for constants
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* and more then zero for other
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**/
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var ActionAppend = module.exports = function ActionAppend(options) {
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options = options || {};
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if (this.nargs <= 0) {
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throw new Error('nargs for append actions must be > 0; if arg ' +
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'strings are not supplying the value to append, ' +
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'the append const action may be more appropriate');
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}
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if (!!this.constant && this.nargs !== c.OPTIONAL) {
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throw new Error('nargs must be OPTIONAL to supply const');
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}
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Action.call(this, options);
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};
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util.inherits(ActionAppend, Action);
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/*:nodoc:*
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* ActionAppend#call(parser, namespace, values, optionString) -> Void
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* - parser (ArgumentParser): current parser
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* - namespace (Namespace): namespace for output data
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* - values (Array): parsed values
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* - optionString (Array): input option string(not parsed)
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*
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* Call the action. Save result in namespace object
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**/
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ActionAppend.prototype.call = function (parser, namespace, values) {
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var items = (namespace[this.dest] || []).slice();
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items.push(values);
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namespace.set(this.dest, items);
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};
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