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70 lines
1.9 KiB
JavaScript
70 lines
1.9 KiB
JavaScript
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/**
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* @fileoverview Rule to enforce the use of `u` flag on RegExp.
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* @author Toru Nagashima
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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 {
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CALL,
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CONSTRUCT,
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ReferenceTracker,
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getStringIfConstant
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} = require("eslint-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: "enforce the use of `u` flag on RegExp",
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category: "Best Practices",
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recommended: false,
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url: "https://eslint.org/docs/rules/require-unicode-regexp"
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},
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messages: {
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requireUFlag: "Use the 'u' flag."
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},
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schema: []
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},
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create(context) {
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return {
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"Literal[regex]"(node) {
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const flags = node.regex.flags || "";
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if (!flags.includes("u")) {
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context.report({ node, messageId: "requireUFlag" });
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}
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},
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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 trackMap = {
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RegExp: { [CALL]: true, [CONSTRUCT]: true }
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};
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for (const { node } of tracker.iterateGlobalReferences(trackMap)) {
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const flagsNode = node.arguments[1];
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const flags = getStringIfConstant(flagsNode, scope);
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if (!flagsNode || (typeof flags === "string" && !flags.includes("u"))) {
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context.report({ node, messageId: "requireUFlag" });
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}
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}
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}
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};
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}
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};
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