d9b8758f47
PR-URL: https://github.com/nodejs/node/pull/6132 Reviewed-By: Brian White <mscdex@mscdex.net> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: thefourtheye <thechargingvolcano@gmail.com>
71 lines
2 KiB
JavaScript
71 lines
2 KiB
JavaScript
/**
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* @fileoverview Restrict usage of specified globals.
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* @author Benoît Zugmeyer
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* @copyright 2016 Benoît Zugmeyer. All rights reserved.
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* See LICENSE file in root directory for full license.
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = function(context) {
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var restrictedGlobals = context.options;
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// if no globals are restricted we don't need to check
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if (restrictedGlobals.length === 0) {
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return {};
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}
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/**
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* Report a variable to be used as a restricted global.
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* @param {Reference} reference the variable reference
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* @returns {void}
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* @private
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*/
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function reportReference(reference) {
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context.report(reference.identifier, "Unexpected use of '{{name}}'", {
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name: reference.identifier.name
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});
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}
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/**
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* Check if the given name is a restricted global name.
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* @param {string} name name of a variable
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* @returns {boolean} whether the variable is a restricted global or not
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* @private
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*/
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function isRestricted(name) {
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return restrictedGlobals.indexOf(name) >= 0;
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}
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return {
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"Program": function() {
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var scope = context.getScope();
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// Report variables declared elsewhere (ex: variables defined as "global" by eslint)
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scope.variables.forEach(function(variable) {
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if (!variable.defs.length && isRestricted(variable.name)) {
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variable.references.forEach(reportReference);
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}
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});
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// Report variables not declared at all
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scope.through.forEach(function(reference) {
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if (isRestricted(reference.identifier.name)) {
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reportReference(reference);
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}
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});
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}
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};
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};
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module.exports.schema = {
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"type": "array",
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"items": {
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"type": "string"
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},
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"uniqueItems": true
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};
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