87 lines
1.8 KiB
JavaScript
87 lines
1.8 KiB
JavaScript
'use strict';
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const isPlainObject = require('is-plain-obj');
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const arrify = require('arrify');
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const push = (obj, prop, value) => {
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if (!obj[prop]) {
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obj[prop] = [];
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}
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obj[prop].push(value);
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};
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const insert = (obj, prop, key, value) => {
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if (!obj[prop]) {
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obj[prop] = {};
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}
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obj[prop][key] = value;
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};
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const passthroughOptions = ['stopEarly', 'unknown', '--'];
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const availableTypes = ['string', 'boolean', 'number', 'array'];
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const buildOptions = options => {
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options = options || {};
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const result = {};
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passthroughOptions.forEach(key => {
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if (options[key]) {
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result[key] = options[key];
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}
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});
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Object.keys(options).forEach(key => {
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let value = options[key];
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if (key === 'arguments') {
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key = '_';
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}
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// If short form is used
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// convert it to long form
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// e.g. { 'name': 'string' }
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if (typeof value === 'string') {
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value = {type: value};
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}
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if (isPlainObject(value)) {
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const props = value;
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const {type} = props;
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if (type) {
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if (!availableTypes.includes(type)) {
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throw new TypeError(`Expected "${key}" to be one of ["string", "boolean", "number", "array"], got ${type}`);
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}
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push(result, type, key);
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}
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const aliases = arrify(props.alias);
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aliases.forEach(alias => {
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insert(result, 'alias', alias, key);
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});
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if ({}.hasOwnProperty.call(props, 'default')) {
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if (type === 'array' && !Array.isArray(props.default)) {
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throw new TypeError(`Expected "${key}" default value to be array, got ${typeof props.default}`);
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}
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if (type && type !== 'array' && typeof props.default !== type) {
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throw new TypeError(`Expected "${key}" default value to be ${type}, got ${typeof props.default}`);
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}
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insert(result, 'default', key, props.default);
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}
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}
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});
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return result;
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};
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module.exports = buildOptions;
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module.exports.default = buildOptions;
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