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All rights reserved. Licensed under the MIT license.\n// See LICENSE in the project root for license information.\n\nimport fs from 'node:fs';\n\nimport {\n ESLINT_BULK_FORCE_REGENERATE_PATCH_ENV_VAR_NAME,\n ESLINT_BULK_PATCH_PATH_ENV_VAR_NAME\n} from './constants';\n\n/**\n * Dynamically generate file to properly patch many versions of ESLint\n * @param inputFilePath - Must be an iteration of https://github.com/eslint/eslint/blob/main/lib/linter/linter.js\n * @param outputFilePath - Some small changes to linter.js\n */\nexport function generatePatchedLinterJsFileIfDoesNotExist(\n inputFilePath: string,\n outputFilePath: string,\n eslintPackageVersion: string\n): void {\n const generateEnvVarValue: string | undefined =\n process.env[ESLINT_BULK_FORCE_REGENERATE_PATCH_ENV_VAR_NAME];\n if (generateEnvVarValue !== 'true' && generateEnvVarValue !== '1' && fs.existsSync(outputFilePath)) {\n return;\n }\n\n const [majorVersionString, minorVersionString] = eslintPackageVersion.split('.');\n const majorVersion: number = parseInt(majorVersionString, 10);\n const minorVersion: number = parseInt(minorVersionString, 10);\n\n const inputFile: string = fs.readFileSync(inputFilePath).toString();\n\n let inputIndex: number = 0;\n\n /**\n * Extract from the stream until marker is reached. When matching marker,\n * ignore whitespace in the stream and in the marker. Return the extracted text.\n */\n function scanUntilMarker(marker: string): string {\n const trimmedMarker: string = marker.replace(/\\s/g, '');\n\n let output: string = '';\n let trimmed: string = '';\n\n while (inputIndex < inputFile.length) {\n const char: string = inputFile[inputIndex++];\n output += char;\n if (!/^\\s$/.test(char)) {\n trimmed += char;\n }\n if (trimmed.endsWith(trimmedMarker)) {\n return output;\n }\n }\n\n throw new Error('Unexpected end of input while looking for ' + JSON.stringify(marker));\n }\n\n function scanUntilNewline(): string {\n let output: string = '';\n\n while (inputIndex < inputFile.length) {\n const char: string = inputFile[inputIndex++];\n output += char;\n if (char === '\\n') {\n return output;\n }\n }\n\n throw new Error('Unexpected end of input while looking for new line');\n }\n\n function scanUntilEnd(): string {\n const output: string = inputFile.substring(inputIndex);\n inputIndex = inputFile.length;\n return output;\n }\n\n const markerForStartOfClassMethodSpaces: string = '\\n */\\n ';\n const markerForStartOfClassMethodTabs: string = '\\n\\t */\\n\\t';\n function indexOfStartOfClassMethod(input: string, position?: number): { index: number; marker?: string } {\n let startOfClassMethodIndex: number = input.indexOf(markerForStartOfClassMethodSpaces, position);\n if (startOfClassMethodIndex === -1) {\n startOfClassMethodIndex = input.indexOf(markerForStartOfClassMethodTabs, position);\n if (startOfClassMethodIndex === -1) {\n return { index: startOfClassMethodIndex };\n }\n return { index: startOfClassMethodIndex, marker: markerForStartOfClassMethodTabs };\n }\n return { index: startOfClassMethodIndex, marker: markerForStartOfClassMethodSpaces };\n }\n\n /**\n * Returns index of next public method\n * @param fromIndex - index of inputFile to search if public method still exists\n * @returns -1 if public method does not exist or index of next public method\n */\n function getIndexOfNextMethod(fromIndex: number): { index: number; isPublic?: boolean } {\n const rest: string = inputFile.substring(fromIndex);\n\n const endOfClassIndex: number = rest.indexOf('\\n}');\n\n const { index: startOfClassMethodIndex, marker: startOfClassMethodMarker } =\n indexOfStartOfClassMethod(rest);\n\n if (\n startOfClassMethodIndex === -1 ||\n !startOfClassMethodMarker ||\n startOfClassMethodIndex > endOfClassIndex\n ) {\n return { index: -1 };\n }\n\n const afterMarkerIndex: number = startOfClassMethodIndex + startOfClassMethodMarker.length;\n\n const isPublicMethod: boolean =\n rest[afterMarkerIndex] !== '_' &&\n rest[afterMarkerIndex] !== '#' &&\n !rest.substring(afterMarkerIndex, rest.indexOf('\\n', afterMarkerIndex)).includes('static') &&\n !rest.substring(afterMarkerIndex, rest.indexOf('\\n', afterMarkerIndex)).includes('constructor');\n\n return { index: fromIndex + afterMarkerIndex, isPublic: isPublicMethod };\n }\n\n function scanUntilIndex(indexToScanTo: number): string {\n const output: string = inputFile.substring(inputIndex, indexToScanTo);\n inputIndex = indexToScanTo;\n return output;\n }\n\n let outputFile: string = '';\n\n // Match this:\n // //------------------------------------------------------------------------------\n // // Requirements\n // //------------------------------------------------------------------------------\n outputFile += scanUntilMarker('// Requirements');\n outputFile += scanUntilMarker('//--');\n outputFile += scanUntilNewline();\n\n outputFile += `\n// --- BEGIN MONKEY PATCH ---\nconst bulkSuppressionsPatch = require(process.env.${ESLINT_BULK_PATCH_PATH_ENV_VAR_NAME});\nconst requireFromPathToLinterJS = bulkSuppressionsPatch.requireFromPathToLinterJS;\n`;\n\n // Match this:\n // //------------------------------------------------------------------------------\n // // Typedefs\n // //------------------------------------------------------------------------------\n const requireSection: string = scanUntilMarker('// Typedefs');\n\n // Match something like this:\n //\n // const path = require('path'),\n // eslintScope = require('eslint-scope'),\n // evk = require('eslint-visitor-keys'),\n //\n // Convert to something like this:\n //\n // const path = require('path'),\n // eslintScope = requireFromPathToLinterJS('eslint-scope'),\n // evk = requireFromPathToLinterJS('eslint-visitor-keys'),\n //\n outputFile += requireSection.replace(/require\\s*\\((?:'([^']+)'|\"([^\"]+)\")\\)/g, (match, p1, p2) => {\n const importPath: string = p1 ?? p2 ?? '';\n\n if (importPath !== 'path') {\n if (p1) {\n return `requireFromPathToLinterJS('${p1}')`;\n }\n if (p2) {\n return `requireFromPathToLinterJS(\"${p2}\")`;\n }\n }\n\n // Keep as-is\n return match;\n });\n outputFile += `--- END MONKEY PATCH ---\n`;\n\n if (majorVersion >= 9) {\n if (minorVersion >= 37) {\n outputFile += scanUntilMarker('const visitor = new SourceCodeVisitor();');\n } else {\n outputFile += scanUntilMarker('const emitter = createEmitter();');\n }\n\n outputFile += `\n // --- BEGIN MONKEY PATCH ---\n let currentNode = undefined;\n // --- END MONKEY PATCH ---`;\n }\n\n // Match this (9.25.1):\n // ```\n // if (reportTranslator === null) {\n // reportTranslator = createReportTranslator({\n // ruleId,\n // severity,\n // sourceCode,\n // messageIds,\n // disableFixes\n // });\n // }\n // const problem = reportTranslator(...args);\n //\n // if (problem.fix && !(rule.meta && rule.meta.fixable)) {\n // throw new Error(\"Fixable rules must set the `meta.fixable` property to \\\"code\\\" or \\\"whitespace\\\".\");\n // }\n // ```\n // Or this (9.37.0):\n // ```\n // const problem = report.addRuleMessage(\n // ruleId,\n // severity,\n // ...args,\n // );\n //\n // if (problem.fix && !(rule.meta && rule.meta.fixable)) {\n // throw new Error(\n // 'Fixable rules must set the `meta.fixable` property to \"code\" or \"whitespace\".',\n // );\n // }\n // ```\n //\n // Convert to something like this (9.25.1):\n // ```\n // if (reportTranslator === null) {\n // reportTranslator = createReportTranslator({\n // ruleId,\n // severity,\n // sourceCode,\n // messageIds,\n // disableFixes\n // });\n // }\n // const problem = reportTranslator(...args);\n // // --- BEGIN MONKEY PATCH ---\n // if (bulkSuppressionsPatch.shouldBulkSuppress({ filename, currentNode: args[0]?.node ?? currentNode, ruleId, problem })) return;\n // // --- END MONKEY PATCH ---\n //\n // if (problem.fix && !(rule.meta && rule.meta.fixable)) {\n // throw new Error(\"Fixable rules must set the `meta.fixable` property to \\\"code\\\" or \\\"whitespace\\\".\");\n // }\n // ```\n // Or this (9.37.0):\n // ```\n // const problem = report.addRuleMessage(\n // ruleId,\n // severity,\n // ...args,\n // );\n // // --- BEGIN MONKEY PATCH ---\n // if (bulkSuppressionsPatch.shouldBulkSuppress({ filename, currentNode: args[0]?.node ?? currentNode, ruleId, problem })) return;\n // // --- END MONKEY PATCH ---\n //\n // if (problem.fix && !(rule.meta && rule.meta.fixable)) {\n // throw new Error(\n // 'Fixable rules must set the `meta.fixable` property to \"code\" or \"whitespace\".',\n // );\n // }\n // ```\n if (majorVersion > 9 || (majorVersion === 9 && minorVersion >= 37)) {\n outputFile += scanUntilMarker('const problem = report.addRuleMessage(');\n outputFile += scanUntilMarker('ruleId,');\n outputFile += scanUntilMarker('severity,');\n outputFile += scanUntilMarker('...args,');\n outputFile += scanUntilMarker(');');\n } else {\n outputFile += scanUntilMarker('const problem = reportTranslator(...args);');\n }\n\n outputFile += `\n // --- BEGIN MONKEY PATCH ---`;\n if (majorVersion > 9 || (majorVersion === 9 && minorVersion >= 37)) {\n outputFile += `\n if (bulkSuppressionsPatch.shouldBulkSuppress({ filename, currentNode: args[0]?.node ?? currentNode, ruleId, problem })) {\n problem.suppressions ??= []; problem.suppressions.push({kind:\"bulk\",justification:\"\"});\n }`;\n } else {\n outputFile += `\n if (bulkSuppressionsPatch.shouldBulkSuppress({ filename, currentNode: args[0]?.node ?? currentNode, ruleId, problem })) return;`;\n }\n\n outputFile += `\n // --- END MONKEY PATCH ---`;\n\n //\n // Match this:\n // ```\n // Object.keys(ruleListeners).forEach(selector => {\n // ...\n // });\n // ```\n //\n // Convert to something like this (9.25.1):\n // ```\n // Object.keys(ruleListeners).forEach(selector => {\n // // --- BEGIN MONKEY PATCH ---\n // emitter.on(selector, (...args) => { currentNode = args[args.length - 1]; });\n // // --- END MONKEY PATCH ---\n // ...\n // });\n // ```\n // Or this (9.37.0):\n // ```\n // Object.keys(ruleListeners).forEach(selector => {\n // // --- BEGIN MONKEY PATCH ---\n // visitor.add(selector, (...args) => { currentNode = args[args.length - 1]; });\n // // --- END MONKEY PATCH ---\n // ...\n // });\n // ```\n if (majorVersion >= 9) {\n outputFile += scanUntilMarker('Object.keys(ruleListeners).forEach(selector => {');\n outputFile += `\n // --- BEGIN MONKEY PATCH ---\n`;\n if (minorVersion >= 37) {\n outputFile += `visitor.add(selector, (...args) => { currentNode = args[args.length - 1]; });`;\n } else {\n outputFile += `emitter.on(selector, (...args) => { currentNode = args[args.length - 1]; });`;\n }\n\n outputFile += `\n // --- END MONKEY PATCH ---`;\n }\n\n outputFile += scanUntilMarker('class Linter {');\n outputFile += scanUntilNewline();\n outputFile += `\n // --- BEGIN MONKEY PATCH ---\n /**\n * We intercept ESLint execution at the .eslintrc.js file, but unfortunately the Linter class is\n * initialized before the .eslintrc.js file is executed. This means the internalSlotsMap that all\n * the patched methods refer to is not initialized. This method checks if the internalSlotsMap is\n * initialized, and if not, initializes it.\n */\n _conditionallyReinitialize({ cwd, configType } = {}) {\n if (internalSlotsMap.get(this) === undefined) {\n internalSlotsMap.set(this, {\n cwd: normalizeCwd(cwd),\n flags: [],\n lastConfigArray: null,\n lastSourceCode: null,\n lastSuppressedMessages: [],\n configType, // TODO: Remove after flat config conversion\n parserMap: new Map([['espree', espree]]),\n ruleMap: new Rules()\n });\n\n this.version = pkg.version;\n }\n }\n // --- END MONKEY PATCH ---\n`;\n\n const privateMethodNames: string[] = [];\n let { index: indexOfNextMethod, isPublic } = getIndexOfNextMethod(inputIndex);\n\n while (indexOfNextMethod !== -1) {\n outputFile += scanUntilIndex(indexOfNextMethod);\n if (isPublic) {\n // Inject the monkey patch at the start of the public method\n outputFile += scanUntilNewline();\n outputFile += ` // --- BEGIN MONKEY PATCH ---\n this._conditionallyReinitialize();\n // --- END MONKEY PATCH ---\n`;\n } else if (inputFile[inputIndex] === '#') {\n // Replace the '#' private method with a '_' private method, so that our monkey patch\n // can still call it. Otherwise, we get the following error during execution:\n // TypeError: Receiver must be an instance of class Linter\n const privateMethodName: string = scanUntilMarker('(');\n // Remove the '(' at the end and stash it, since we need to escape it for the regex later\n privateMethodNames.push(privateMethodName.slice(0, -1));\n outputFile += `_${privateMethodName.slice(1)}`;\n }\n\n const indexResult: { index: number; isPublic?: boolean } = getIndexOfNextMethod(inputIndex);\n indexOfNextMethod = indexResult.index;\n isPublic = indexResult.isPublic;\n }\n\n outputFile += scanUntilEnd();\n\n // Do a second pass to find and replace all calls to private methods with the patched versions.\n if (privateMethodNames.length) {\n const privateMethodCallRegex: RegExp = new RegExp(`\\.(${privateMethodNames.join('|')})\\\\(`, 'g');\n outputFile = outputFile.replace(privateMethodCallRegex, (match, privateMethodName) => {\n // Replace the leading '#' with a leading '_'\n return `._${privateMethodName.slice(1)}(`;\n });\n }\n\n fs.writeFileSync(outputFilePath, outputFile);\n}\n"]} |
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