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 <a href="../../index.html">All files</a> / <a href="index.html">coa/lib</a> opt.js
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 <div class='fl pad1y space-right2'>
 91.84% 
 Statements
 45/49
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 <div class='fl pad1y space-right2'>
 72.73% 
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 16/22
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 100% 
 Functions
 14/14
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 95.65% 
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 44/46
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<pre><table class="coverage">
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154</td><td class="line-coverage quiet">&nbsp;
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&nbsp;</td><td class="text"><pre class="prettyprint lang-js">'use strict';
&nbsp;
const
 Q = require('q'),
&nbsp;
 CoaParam = require('./coaparam'),
 Color = require('./color');
&nbsp;
/**
 * Option
 *
 * Named entity. Options may have short and long keys for use from command line.
 *
 * @namespace
 * @class Opt
 * @extends CoaParam
 */
module.exports = class Opt extends CoaParam {
 /**
 * @constructs
 * @param {COA.Cmd} cmd - parent command
 */
 constructor(cmd) {
 super(cmd);
&nbsp;
 this._short = null;
 this._long = null;
 this._flag = false;
 this._only = false;
 this._cmd._opts.push(this);
 }
&nbsp;
 /**
 * Set a short key for option to be used with one hyphen from command line.
 *
 * @param {String} short - short name
 * @returns {COA.Opt} - this instance (for chainability)
 */
 short(short) {
 this._short = short;
 this._cmd._optsByKey[`-${short}`] = this;
 return this;
 }
&nbsp;
 /**
 * Set a short key for option to be used with double hyphens from command line.
 *
 * @param {String} long - long name
 * @returns {COA.Opt} - this instance (for chainability)
 */
 long(long) {
 this._long = long;
 this._cmd._optsByKey[`--${long}`] = this;
 return this;
 }
&nbsp;
 /**
 * Make an option boolean, i.e. option without value.
 *
 * @returns {COA.Opt} - this instance (for chainability)
 */
 flag() {
 this._flag = true;
 return this;
 }
&nbsp;
 /**
 * Makes an option to act as a command,
 * i.e. program will exit just after option action.
 *
 * @returns {COA.Opt} - this instance (for chainability)
 */
 only() {
 this._only = true;
 return this;
 }
&nbsp;
 /**
 * Add action for current option command.
 * This action is performed if the current option
 * is present in parsed options (with any value).
 *
 * @param {Function} act - action function,
 * invoked in the context of command instance
 * and has the parameters:
 * - {Object} opts - parsed options
 * - {Array} args - parsed arguments
 * - {Object} res - actions result accumulator
 * It can return rejected promise by Cmd.reject (in case of error)
 * or any other value treated as result.
 * @returns {COA.Opt} - this instance (for chainability)
 */
 act(act) {
 this._cmd.act((opts) =&gt; {
 Iif(!opts.hasOwnProperty(this._name)) return;
&nbsp;
 const res = act.apply(this._cmd, arguments);
 Iif(!this._only) return res;
&nbsp;
 return Q.when(res, (out) =&gt; this._cmd.reject({
 toString : () =&gt; out.toString(),
 exitCode : 0
 }));
 });
&nbsp;
 return this;
 }
&nbsp;
 _saveVal(opts, val) {
 this._val &amp;&amp; (val = this._val(val));
&nbsp;
 const name = this._name;
 this._arr
 ? (opts[name] || (opts[name] = [])).push(val)
 : (opts[name] = val);
&nbsp;
 return val;
 }
&nbsp;
 _parse(argv, opts) {
 return this._saveVal(opts, this._flag ? true : argv.shift());
 }
&nbsp;
 _checkParsed(opts) {
 return !opts.hasOwnProperty(this._name);
 }
&nbsp;
 _usage() {
 const res = [],
 nameStr = this._name.toUpperCase();
&nbsp;
 Eif(this._short) {
 res.push('-', Color('lgreen', this._short));
 this._flag || res.push(' ' + nameStr);
 res.push(', ');
 }
&nbsp;
 Iif(this._long) {
 res.push('--', Color('green', this._long));
 this._flag || res.push('=' + nameStr);
 }
&nbsp;
 res.push(' : ', this._title);
&nbsp;
 this._req &amp;&amp; res.push(' ', Color('lred', '(required)'));
&nbsp;
 return res.join('');
 }
&nbsp;
 _requiredText() {
 return `Missing required option:\n ${this._usage()}`;
 }
};
&nbsp;</pre></td></tr>
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 Code coverage
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