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1ada95e04a
- Convert project to Javascript/Typescript - Allow custom headers to be passed in (optional) - Allow body to be optional
81 lines
2.4 KiB
JavaScript
81 lines
2.4 KiB
JavaScript
/**
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* @fileoverview Rule to flag variable leak in CatchClauses in IE 8 and earlier
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* @author Ian Christian Myers
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* @deprecated in ESLint v5.1.0
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const astUtils = require("./utils/ast-utils");
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = {
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meta: {
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type: "suggestion",
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docs: {
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description: "disallow `catch` clause parameters from shadowing variables in the outer scope",
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category: "Variables",
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recommended: false,
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url: "https://eslint.org/docs/rules/no-catch-shadow"
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},
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replacedBy: ["no-shadow"],
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deprecated: true,
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schema: [],
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messages: {
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mutable: "Value of '{{name}}' may be overwritten in IE 8 and earlier."
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}
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},
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create(context) {
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//--------------------------------------------------------------------------
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// Helpers
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//--------------------------------------------------------------------------
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/**
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* Check if the parameters are been shadowed
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* @param {Object} scope current scope
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* @param {string} name parameter name
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* @returns {boolean} True is its been shadowed
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*/
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function paramIsShadowing(scope, name) {
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return astUtils.getVariableByName(scope, name) !== null;
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}
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//--------------------------------------------------------------------------
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// Public API
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//--------------------------------------------------------------------------
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return {
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"CatchClause[param!=null]"(node) {
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let scope = context.getScope();
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/*
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* When ecmaVersion >= 6, CatchClause creates its own scope
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* so start from one upper scope to exclude the current node
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*/
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if (scope.block === node) {
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scope = scope.upper;
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}
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if (paramIsShadowing(scope, node.param.name)) {
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context.report({ node, messageId: "mutable", data: { name: node.param.name } });
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}
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}
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};
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}
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};
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