File: get-resolve-paths.js

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/**
 * @author Toru Nagashima
 * See LICENSE file in root directory for full license.
 */
"use strict"

const DEFAULT_VALUE = Object.freeze(["/usr/share/nodejs", "/usr/lib/nodejs"])

/**
 * Gets `resolvePaths` property from a given option object.
 *
 * @param {object|undefined} option - An option object to get.
 * @returns {string[]|null} The `allowModules` value, or `null`.
 */
function get(option) {
    if (option && option.resolvePaths && Array.isArray(option.resolvePaths)) {
        return option.resolvePaths.map(String)
    }
    return null
}

/**
 * Gets "resolvePaths" setting.
 *
 * 1. This checks `options` property, then returns it if exists.
 * 2. This checks `settings.node` property, then returns it if exists.
 * 3. This returns `["/usr/share/nodejs", "/usr/lib/nodejs"]`.
 *
 * @param {RuleContext} context - The rule context.
 * @returns {string[]} A list of extensions.
 */
module.exports = function getResolvePaths(context, optionIndex = 0) {
    return (
        get(context.options && context.options[optionIndex]) ||
        get(context.settings && context.settings.node) ||
        DEFAULT_VALUE
    )
}

module.exports.schema = {
    type: "array",
    items: { type: "string" },
    uniqueItems: true,
}