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84 lines
2.6 KiB
84 lines
2.6 KiB
/** |
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* @fileoverview Rule to flag use of an object property of the global object (Math and JSON) as a function |
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* @author James Allardice |
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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 { CALL, CONSTRUCT, ReferenceTracker } = require("eslint-utils"); |
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const getPropertyName = require("./utils/ast-utils").getStaticPropertyName; |
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//------------------------------------------------------------------------------ |
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// Helpers |
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//------------------------------------------------------------------------------ |
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const nonCallableGlobals = ["Atomics", "JSON", "Math", "Reflect"]; |
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/** |
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* Returns the name of the node to report |
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* @param {ASTNode} node A node to report |
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* @returns {string} name to report |
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*/ |
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function getReportNodeName(node) { |
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if (node.type === "ChainExpression") { |
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return getReportNodeName(node.expression); |
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} |
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if (node.type === "MemberExpression") { |
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return getPropertyName(node); |
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} |
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return node.name; |
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} |
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//------------------------------------------------------------------------------ |
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// Rule Definition |
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//------------------------------------------------------------------------------ |
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/** @type {import('../shared/types').Rule} */ |
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module.exports = { |
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meta: { |
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type: "problem", |
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docs: { |
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description: "Disallow calling global object properties as functions", |
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recommended: true, |
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url: "https://eslint.org/docs/rules/no-obj-calls" |
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}, |
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schema: [], |
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messages: { |
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unexpectedCall: "'{{name}}' is not a function.", |
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unexpectedRefCall: "'{{name}}' is reference to '{{ref}}', which is not a function." |
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} |
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}, |
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create(context) { |
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return { |
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Program() { |
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const scope = context.getScope(); |
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const tracker = new ReferenceTracker(scope); |
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const traceMap = {}; |
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for (const g of nonCallableGlobals) { |
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traceMap[g] = { |
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[CALL]: true, |
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[CONSTRUCT]: true |
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}; |
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} |
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for (const { node, path } of tracker.iterateGlobalReferences(traceMap)) { |
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const name = getReportNodeName(node.callee); |
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const ref = path[0]; |
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const messageId = name === ref ? "unexpectedCall" : "unexpectedRefCall"; |
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context.report({ node, messageId, data: { name, ref } }); |
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} |
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} |
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}; |
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} |
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};
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