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86 lines
2.9 KiB
86 lines
2.9 KiB
10 years ago
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/**
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* @fileoverview Common utilities.
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Constants
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//------------------------------------------------------------------------------
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var PLUGIN_NAME_PREFIX = "eslint-plugin-",
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NAMESPACE_REGEX = /^@.*\//i;
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//------------------------------------------------------------------------------
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// Public Interface
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//------------------------------------------------------------------------------
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/**
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* Merges two config objects. This will not only add missing keys, but will also modify values to match.
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* @param {Object} base config object
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* @param {Object} custom config object. Overrides in this config object will take priority over base.
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* @returns {Object} merged config object.
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*/
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exports.mergeConfigs = function mergeConfigs(base, custom) {
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Object.keys(custom).forEach(function (key) {
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var property = custom[key];
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if (key === "plugins") {
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if (!base[key]) {
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base[key] = [];
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}
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property.forEach(function (plugin) {
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// skip duplicates
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if (base[key].indexOf(plugin) === -1) {
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base[key].push(plugin);
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}
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});
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return;
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}
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if (Array.isArray(base[key]) && !Array.isArray(property) && typeof property === "number") {
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// assume that we are just overriding first attribute
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base[key][0] = custom[key];
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return;
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}
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if (typeof property === "object" && !Array.isArray(property) && property !== null) {
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// base[key] might not exist, so be careful with recursion here
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base[key] = mergeConfigs(base[key] || {}, custom[key]);
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} else {
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base[key] = custom[key];
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}
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});
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return base;
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};
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/**
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* Removes the prefix `eslint-plugin-` from a plugin name.
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* @param {string} pluginName The name of the plugin which may have the prefix.
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* @returns {string} The name of the plugin without prefix.
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*/
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exports.removePluginPrefix = function removePluginPrefix(pluginName) {
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return pluginName.indexOf(PLUGIN_NAME_PREFIX) === 0 ? pluginName.substring(PLUGIN_NAME_PREFIX.length) : pluginName;
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};
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/**
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* @param {string} pluginName The name of the plugin which may have the prefix.
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* @returns {string} The name of the plugins namepace if it has one.
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*/
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exports.getNamespace = function getNamespace(pluginName) {
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return pluginName.match(NAMESPACE_REGEX) ? pluginName.match(NAMESPACE_REGEX)[0] : "";
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};
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/**
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* Removes the namespace from a plugin name.
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* @param {string} pluginName The name of the plugin which may have the prefix.
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* @returns {string} The name of the plugin without the namespace.
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*/
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exports.removeNameSpace = function removeNameSpace(pluginName) {
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return pluginName.replace(NAMESPACE_REGEX, "");
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};
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exports.PLUGIN_NAME_PREFIX = PLUGIN_NAME_PREFIX;
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