2 * @fileoverview Main CLI object.
3 * @author Nicholas C. Zakas
9 * The CLI object should *not* call process.exit() directly. It should only return
10 * exit codes. This allows other programs to use the CLI object and still control
11 * when the program exits.
14 //------------------------------------------------------------------------------
16 //------------------------------------------------------------------------------
18 const fs = require("fs");
19 const path = require("path");
20 const defaultOptions = require("../../conf/default-cli-options");
21 const pkg = require("../../package.json");
22 const ConfigOps = require("../shared/config-ops");
23 const naming = require("../shared/naming");
24 const ModuleResolver = require("../shared/relative-module-resolver");
25 const { Linter } = require("../linter");
26 const builtInRules = require("../rules");
27 const { CascadingConfigArrayFactory } = require("./cascading-config-array-factory");
28 const { IgnorePattern, getUsedExtractedConfigs } = require("./config-array");
29 const { FileEnumerator } = require("./file-enumerator");
30 const hash = require("./hash");
31 const LintResultCache = require("./lint-result-cache");
33 const debug = require("debug")("eslint:cli-engine");
34 const validFixTypes = new Set(["problem", "suggestion", "layout"]);
36 //------------------------------------------------------------------------------
38 //------------------------------------------------------------------------------
40 // For VSCode IntelliSense
41 /** @typedef {import("../shared/types").ConfigData} ConfigData */
42 /** @typedef {import("../shared/types").LintMessage} LintMessage */
43 /** @typedef {import("../shared/types").ParserOptions} ParserOptions */
44 /** @typedef {import("../shared/types").Plugin} Plugin */
45 /** @typedef {import("../shared/types").RuleConf} RuleConf */
46 /** @typedef {import("../shared/types").Rule} Rule */
47 /** @typedef {ReturnType<CascadingConfigArrayFactory["getConfigArrayForFile"]>} ConfigArray */
48 /** @typedef {ReturnType<ConfigArray["extractConfig"]>} ExtractedConfig */
51 * The options to configure a CLI engine with.
52 * @typedef {Object} CLIEngineOptions
53 * @property {boolean} allowInlineConfig Enable or disable inline configuration comments.
54 * @property {ConfigData} baseConfig Base config object, extended by all configs used with this CLIEngine instance
55 * @property {boolean} cache Enable result caching.
56 * @property {string} cacheLocation The cache file to use instead of .eslintcache.
57 * @property {string} configFile The configuration file to use.
58 * @property {string} cwd The value to use for the current working directory.
59 * @property {string[]} envs An array of environments to load.
60 * @property {string[]} extensions An array of file extensions to check.
61 * @property {boolean|Function} fix Execute in autofix mode. If a function, should return a boolean.
62 * @property {string[]} fixTypes Array of rule types to apply fixes for.
63 * @property {string[]} globals An array of global variables to declare.
64 * @property {boolean} ignore False disables use of .eslintignore.
65 * @property {string} ignorePath The ignore file to use instead of .eslintignore.
66 * @property {string|string[]} ignorePattern One or more glob patterns to ignore.
67 * @property {boolean} useEslintrc False disables looking for .eslintrc
68 * @property {string} parser The name of the parser to use.
69 * @property {ParserOptions} parserOptions An object of parserOption settings to use.
70 * @property {string[]} plugins An array of plugins to load.
71 * @property {Record<string,RuleConf>} rules An object of rules to use.
72 * @property {string[]} rulePaths An array of directories to load custom rules from.
73 * @property {boolean} reportUnusedDisableDirectives `true` adds reports for unused eslint-disable directives
74 * @property {boolean} globInputPaths Set to false to skip glob resolution of input file paths to lint (default: true). If false, each input file paths is assumed to be a non-glob path to an existing file.
75 * @property {string} resolvePluginsRelativeTo The folder where plugins should be resolved from, defaulting to the CWD
80 * @typedef {Object} LintResult
81 * @property {string} filePath The path to the file that was linted.
82 * @property {LintMessage[]} messages All of the messages for the result.
83 * @property {number} errorCount Number of errors for the result.
84 * @property {number} warningCount Number of warnings for the result.
85 * @property {number} fixableErrorCount Number of fixable errors for the result.
86 * @property {number} fixableWarningCount Number of fixable warnings for the result.
87 * @property {string} [source] The source code of the file that was linted.
88 * @property {string} [output] The source code of the file that was linted, with as many fixes applied as possible.
92 * Information of deprecated rules.
93 * @typedef {Object} DeprecatedRuleInfo
94 * @property {string} ruleId The rule ID.
95 * @property {string[]} replacedBy The rule IDs that replace this deprecated rule.
100 * @typedef {Object} LintReport
101 * @property {LintResult[]} results All of the result.
102 * @property {number} errorCount Number of errors for the result.
103 * @property {number} warningCount Number of warnings for the result.
104 * @property {number} fixableErrorCount Number of fixable errors for the result.
105 * @property {number} fixableWarningCount Number of fixable warnings for the result.
106 * @property {DeprecatedRuleInfo[]} usedDeprecatedRules The list of used deprecated rules.
110 * Private data for CLIEngine.
111 * @typedef {Object} CLIEngineInternalSlots
112 * @property {Map<string, Plugin>} additionalPluginPool The map for additional plugins.
113 * @property {string} cacheFilePath The path to the cache of lint results.
114 * @property {CascadingConfigArrayFactory} configArrayFactory The factory of configs.
115 * @property {(filePath: string) => boolean} defaultIgnores The default predicate function to check if a file ignored or not.
116 * @property {FileEnumerator} fileEnumerator The file enumerator.
117 * @property {ConfigArray[]} lastConfigArrays The list of config arrays that the last `executeOnFiles` or `executeOnText` used.
118 * @property {LintResultCache|null} lintResultCache The cache of lint results.
119 * @property {Linter} linter The linter instance which has loaded rules.
120 * @property {CLIEngineOptions} options The normalized options of this instance.
123 //------------------------------------------------------------------------------
125 //------------------------------------------------------------------------------
127 /** @type {WeakMap<CLIEngine, CLIEngineInternalSlots>} */
128 const internalSlotsMap = new WeakMap();
131 * Determines if each fix type in an array is supported by ESLint and throws
133 * @param {string[]} fixTypes An array of fix types to check.
135 * @throws {Error} If an invalid fix type is found.
137 function validateFixTypes(fixTypes) {
138 for (const fixType of fixTypes) {
139 if (!validFixTypes.has(fixType)) {
140 throw new Error(`Invalid fix type "${fixType}" found.`);
146 * It will calculate the error and warning count for collection of messages per file
147 * @param {LintMessage[]} messages Collection of messages
148 * @returns {Object} Contains the stats
151 function calculateStatsPerFile(messages) {
152 return messages.reduce((stat, message) => {
153 if (message.fatal || message.severity === 2) {
156 stat.fixableErrorCount++;
161 stat.fixableWarningCount++;
168 fixableErrorCount: 0,
169 fixableWarningCount: 0
174 * It will calculate the error and warning count for collection of results from all files
175 * @param {LintResult[]} results Collection of messages from all the files
176 * @returns {Object} Contains the stats
179 function calculateStatsPerRun(results) {
180 return results.reduce((stat, result) => {
181 stat.errorCount += result.errorCount;
182 stat.warningCount += result.warningCount;
183 stat.fixableErrorCount += result.fixableErrorCount;
184 stat.fixableWarningCount += result.fixableWarningCount;
189 fixableErrorCount: 0,
190 fixableWarningCount: 0
195 * Processes an source code using ESLint.
196 * @param {Object} config The config object.
197 * @param {string} config.text The source code to verify.
198 * @param {string} config.cwd The path to the current working directory.
199 * @param {string|undefined} config.filePath The path to the file of `text`. If this is undefined, it uses `<text>`.
200 * @param {ConfigArray} config.config The config.
201 * @param {boolean} config.fix If `true` then it does fix.
202 * @param {boolean} config.allowInlineConfig If `true` then it uses directive comments.
203 * @param {boolean} config.reportUnusedDisableDirectives If `true` then it reports unused `eslint-disable` comments.
204 * @param {RegExp} config.extensionRegExp The `RegExp` object that tests if a file path has the allowed file extensions.
205 * @param {Linter} config.linter The linter instance to verify.
206 * @returns {LintResult} The result of linting.
209 function verifyText({
212 filePath: providedFilePath,
216 reportUnusedDisableDirectives,
220 const filePath = providedFilePath || "<text>";
222 debug(`Lint ${filePath}`);
226 * `config.extractConfig(filePath)` requires an absolute path, but `linter`
227 * doesn't know CWD, so it gives `linter` an absolute path always.
229 const filePathToVerify = filePath === "<text>" ? path.join(cwd, filePath) : filePath;
230 const { fixed, messages, output } = linter.verifyAndFix(
235 filename: filePathToVerify,
237 reportUnusedDisableDirectives,
240 * Check if the linter should adopt a given code block or not.
241 * Currently, the linter adopts code blocks if the name matches `--ext` option.
242 * In the future, `overrides` in the configuration would affect the adoption (https://github.com/eslint/rfcs/pull/20).
243 * @param {string} blockFilename The virtual filename of a code block.
244 * @returns {boolean} `true` if the linter should adopt the code block.
246 filterCodeBlock(blockFilename) {
247 return extensionRegExp.test(blockFilename);
256 ...calculateStatsPerFile(messages)
260 result.output = output;
263 result.errorCount + result.warningCount > 0 &&
264 typeof result.output === "undefined"
266 result.source = text;
273 * Returns result with warning by ignore settings
274 * @param {string} filePath File path of checked code
275 * @param {string} baseDir Absolute path of base directory
276 * @returns {LintResult} Result with single warning
279 function createIgnoreResult(filePath, baseDir) {
281 const isHidden = /^\./u.test(path.basename(filePath));
282 const isInNodeModules = baseDir && path.relative(baseDir, filePath).startsWith("node_modules");
283 const isInBowerComponents = baseDir && path.relative(baseDir, filePath).startsWith("bower_components");
286 message = "File ignored by default. Use a negated ignore pattern (like \"--ignore-pattern '!<relative/path/to/filename>'\") to override.";
287 } else if (isInNodeModules) {
288 message = "File ignored by default. Use \"--ignore-pattern '!node_modules/*'\" to override.";
289 } else if (isInBowerComponents) {
290 message = "File ignored by default. Use \"--ignore-pattern '!bower_components/*'\" to override.";
292 message = "File ignored because of a matching ignore pattern. Use \"--no-ignore\" to override.";
296 filePath: path.resolve(filePath),
306 fixableErrorCount: 0,
307 fixableWarningCount: 0
313 * @param {string} ruleId The rule ID to get.
314 * @param {ConfigArray[]} configArrays The config arrays that have plugin rules.
315 * @returns {Rule|null} The rule or null.
317 function getRule(ruleId, configArrays) {
318 for (const configArray of configArrays) {
319 const rule = configArray.pluginRules.get(ruleId);
325 return builtInRules.get(ruleId) || null;
329 * Collect used deprecated rules.
330 * @param {ConfigArray[]} usedConfigArrays The config arrays which were used.
331 * @returns {IterableIterator<DeprecatedRuleInfo>} Used deprecated rules.
333 function *iterateRuleDeprecationWarnings(usedConfigArrays) {
334 const processedRuleIds = new Set();
336 // Flatten used configs.
337 /** @type {ExtractedConfig[]} */
338 const configs = [].concat(
339 ...usedConfigArrays.map(getUsedExtractedConfigs)
342 // Traverse rule configs.
343 for (const config of configs) {
344 for (const [ruleId, ruleConfig] of Object.entries(config.rules)) {
346 // Skip if it was processed.
347 if (processedRuleIds.has(ruleId)) {
350 processedRuleIds.add(ruleId);
352 // Skip if it's not used.
353 if (!ConfigOps.getRuleSeverity(ruleConfig)) {
356 const rule = getRule(ruleId, usedConfigArrays);
358 // Skip if it's not deprecated.
359 if (!(rule && rule.meta && rule.meta.deprecated)) {
363 // This rule was used and deprecated.
366 replacedBy: rule.meta.replacedBy || []
373 * Checks if the given message is an error message.
374 * @param {LintMessage} message The message to check.
375 * @returns {boolean} Whether or not the message is an error message.
378 function isErrorMessage(message) {
379 return message.severity === 2;
384 * return the cacheFile to be used by eslint, based on whether the provided parameter is
385 * a directory or looks like a directory (ends in `path.sep`), in which case the file
386 * name will be the `cacheFile/.cache_hashOfCWD`
388 * if cacheFile points to a file or looks like a file then in will just use that file
389 * @param {string} cacheFile The name of file to be used to store the cache
390 * @param {string} cwd Current working directory
391 * @returns {string} the resolved path to the cache file
393 function getCacheFile(cacheFile, cwd) {
396 * make sure the path separators are normalized for the environment/os
397 * keeping the trailing path separator if present
399 const normalizedCacheFile = path.normalize(cacheFile);
401 const resolvedCacheFile = path.resolve(cwd, normalizedCacheFile);
402 const looksLikeADirectory = normalizedCacheFile.slice(-1) === path.sep;
405 * return the name for the cache file in case the provided parameter is a directory
406 * @returns {string} the resolved path to the cacheFile
408 function getCacheFileForDirectory() {
409 return path.join(resolvedCacheFile, `.cache_${hash(cwd)}`);
415 fileStats = fs.lstatSync(resolvedCacheFile);
422 * in case the file exists we need to verify if the provided path
423 * is a directory or a file. If it is a directory we want to create a file
424 * inside that directory
429 * is a directory or is a file, but the original file the user provided
430 * looks like a directory but `path.resolve` removed the `last path.sep`
431 * so we need to still treat this like a directory
433 if (fileStats.isDirectory() || looksLikeADirectory) {
434 return getCacheFileForDirectory();
437 // is file so just use that file
438 return resolvedCacheFile;
442 * here we known the file or directory doesn't exist,
443 * so we will try to infer if its a directory if it looks like a directory
444 * for the current operating system.
447 // if the last character passed is a path separator we assume is a directory
448 if (looksLikeADirectory) {
449 return getCacheFileForDirectory();
452 return resolvedCacheFile;
456 * Convert a string array to a boolean map.
457 * @param {string[]|null} keys The keys to assign true.
458 * @param {boolean} defaultValue The default value for each property.
459 * @param {string} displayName The property name which is used in error message.
460 * @returns {Record<string,boolean>} The boolean map.
462 function toBooleanMap(keys, defaultValue, displayName) {
463 if (keys && !Array.isArray(keys)) {
464 throw new Error(`${displayName} must be an array.`);
466 if (keys && keys.length > 0) {
467 return keys.reduce((map, def) => {
468 const [key, value] = def.split(":");
470 if (key !== "__proto__") {
471 map[key] = value === void 0
483 * Create a config data from CLI options.
484 * @param {CLIEngineOptions} options The options
485 * @returns {ConfigData|null} The created config data.
487 function createConfigDataFromOptions(options) {
495 const env = toBooleanMap(options.envs, true, "envs");
496 const globals = toBooleanMap(options.globals, false, "globals");
500 globals === void 0 &&
501 (ignorePattern === void 0 || ignorePattern.length === 0) &&
503 parserOptions === void 0 &&
504 plugins === void 0 &&
512 ignorePatterns: ignorePattern,
521 * Checks whether a directory exists at the given location
522 * @param {string} resolvedPath A path from the CWD
523 * @returns {boolean} `true` if a directory exists
525 function directoryExists(resolvedPath) {
527 return fs.statSync(resolvedPath).isDirectory();
529 if (error && error.code === "ENOENT") {
536 //------------------------------------------------------------------------------
538 //------------------------------------------------------------------------------
543 * Creates a new instance of the core CLI engine.
544 * @param {CLIEngineOptions} providedOptions The options for this instance.
546 constructor(providedOptions) {
547 const options = Object.assign(
550 { cwd: process.cwd() },
554 if (options.fix === void 0) {
558 const additionalPluginPool = new Map();
559 const cacheFilePath = getCacheFile(
560 options.cacheLocation || options.cacheFile,
563 const configArrayFactory = new CascadingConfigArrayFactory({
564 additionalPluginPool,
565 baseConfig: options.baseConfig || null,
566 cliConfig: createConfigDataFromOptions(options),
568 ignorePath: options.ignorePath,
569 resolvePluginsRelativeTo: options.resolvePluginsRelativeTo,
570 rulePaths: options.rulePaths,
571 specificConfigPath: options.configFile,
572 useEslintrc: options.useEslintrc
574 const fileEnumerator = new FileEnumerator({
577 extensions: options.extensions,
578 globInputPaths: options.globInputPaths,
579 errorOnUnmatchedPattern: options.errorOnUnmatchedPattern,
580 ignore: options.ignore
582 const lintResultCache =
583 options.cache ? new LintResultCache(cacheFilePath) : null;
584 const linter = new Linter({ cwd: options.cwd });
586 /** @type {ConfigArray[]} */
587 const lastConfigArrays = [configArrayFactory.getConfigArrayForFile()];
589 // Store private data.
590 internalSlotsMap.set(this, {
591 additionalPluginPool,
594 defaultIgnores: IgnorePattern.createDefaultIgnore(options.cwd),
602 // setup special filter for fixes
603 if (options.fix && options.fixTypes && options.fixTypes.length > 0) {
604 debug(`Using fix types ${options.fixTypes}`);
606 // throw an error if any invalid fix types are found
607 validateFixTypes(options.fixTypes);
609 // convert to Set for faster lookup
610 const fixTypes = new Set(options.fixTypes);
612 // save original value of options.fix in case it's a function
613 const originalFix = (typeof options.fix === "function")
614 ? options.fix : () => true;
616 options.fix = message => {
617 const rule = message.ruleId && getRule(message.ruleId, lastConfigArrays);
618 const matches = rule && rule.meta && fixTypes.has(rule.meta.type);
620 return matches && originalFix(message);
626 const { lastConfigArrays } = internalSlotsMap.get(this);
628 return new Map(function *() {
631 for (const configArray of lastConfigArrays) {
632 yield* configArray.pluginRules;
638 * Returns results that only contains errors.
639 * @param {LintResult[]} results The results to filter.
640 * @returns {LintResult[]} The filtered results.
642 static getErrorResults(results) {
645 results.forEach(result => {
646 const filteredMessages = result.messages.filter(isErrorMessage);
648 if (filteredMessages.length > 0) {
651 messages: filteredMessages,
652 errorCount: filteredMessages.length,
654 fixableErrorCount: result.fixableErrorCount,
655 fixableWarningCount: 0
664 * Outputs fixes from the given results to files.
665 * @param {LintReport} report The report object created by CLIEngine.
668 static outputFixes(report) {
669 report.results.filter(result => Object.prototype.hasOwnProperty.call(result, "output")).forEach(result => {
670 fs.writeFileSync(result.filePath, result.output);
676 * Add a plugin by passing its configuration
677 * @param {string} name Name of the plugin.
678 * @param {Plugin} pluginObject Plugin configuration object.
681 addPlugin(name, pluginObject) {
683 additionalPluginPool,
686 } = internalSlotsMap.get(this);
688 additionalPluginPool.set(name, pluginObject);
689 configArrayFactory.clearCache();
690 lastConfigArrays.length = 1;
691 lastConfigArrays[0] = configArrayFactory.getConfigArrayForFile();
695 * Resolves the patterns passed into executeOnFiles() into glob-based patterns
696 * for easier handling.
697 * @param {string[]} patterns The file patterns passed on the command line.
698 * @returns {string[]} The equivalent glob patterns.
700 resolveFileGlobPatterns(patterns) {
701 const { options } = internalSlotsMap.get(this);
703 if (options.globInputPaths === false) {
704 return patterns.filter(Boolean);
707 const extensions = options.extensions.map(ext => ext.replace(/^\./u, ""));
708 const dirSuffix = `/**/*.{${extensions.join(",")}}`;
710 return patterns.filter(Boolean).map(pathname => {
711 const resolvedPath = path.resolve(options.cwd, pathname);
712 const newPath = directoryExists(resolvedPath)
713 ? pathname.replace(/[/\\]$/u, "") + dirSuffix
716 return path.normalize(newPath).replace(/\\/gu, "/");
721 * Executes the current configuration on an array of file and directory names.
722 * @param {string[]} patterns An array of file and directory names.
723 * @returns {LintReport} The results for all files that were linted.
725 executeOnFiles(patterns) {
737 reportUnusedDisableDirectives
739 } = internalSlotsMap.get(this);
741 const startTime = Date.now();
743 // Clear the last used config arrays.
744 lastConfigArrays.length = 0;
746 // Delete cache file; should this do here?
749 fs.unlinkSync(cacheFilePath);
751 const errorCode = error && error.code;
753 // Ignore errors when no such file exists or file system is read only (and cache file does not exist)
754 if (errorCode !== "ENOENT" && !(errorCode === "EROFS" && !fs.existsSync(cacheFilePath))) {
760 // Iterate source code files.
761 for (const { config, filePath, ignored } of fileEnumerator.iterateFiles(patterns)) {
763 results.push(createIgnoreResult(filePath, cwd));
768 * Store used configs for:
769 * - this method uses to collect used deprecated rules.
770 * - `getRules()` method uses to collect all loaded rules.
771 * - `--fix-type` option uses to get the loaded rule's meta data.
773 if (!lastConfigArrays.includes(config)) {
774 lastConfigArrays.push(config);
777 // Skip if there is cached result.
778 if (lintResultCache) {
780 lintResultCache.getCachedLintResults(filePath, config);
784 cachedResult.messages &&
785 cachedResult.messages.length > 0;
787 if (hadMessages && fix) {
788 debug(`Reprocessing cached file to allow autofix: ${filePath}`);
790 debug(`Skipping file since it hasn't changed: ${filePath}`);
791 results.push(cachedResult);
798 const result = verifyText({
799 text: fs.readFileSync(filePath, "utf8"),
805 reportUnusedDisableDirectives,
806 extensionRegExp: fileEnumerator.extensionRegExp,
810 results.push(result);
813 * Store the lint result in the LintResultCache.
814 * NOTE: The LintResultCache will remove the file source and any
815 * other properties that are difficult to serialize, and will
816 * hydrate those properties back in on future lint runs.
818 if (lintResultCache) {
819 lintResultCache.setCachedLintResults(filePath, config, result);
823 // Persist the cache to disk.
824 if (lintResultCache) {
825 lintResultCache.reconcile();
828 // Collect used deprecated rules.
829 const usedDeprecatedRules = Array.from(
830 iterateRuleDeprecationWarnings(lastConfigArrays)
833 debug(`Linting complete in: ${Date.now() - startTime}ms`);
836 ...calculateStatsPerRun(results),
842 * Executes the current configuration on text.
843 * @param {string} text A string of JavaScript code to lint.
844 * @param {string} [filename] An optional string representing the texts filename.
845 * @param {boolean} [warnIgnored] Always warn when a file is ignored
846 * @returns {LintReport} The results for the linting.
848 executeOnText(text, filename, warnIgnored) {
858 reportUnusedDisableDirectives
860 } = internalSlotsMap.get(this);
862 const startTime = Date.now();
863 const resolvedFilename = filename && path.resolve(cwd, filename);
865 // Clear the last used config arrays.
866 lastConfigArrays.length = 0;
868 if (resolvedFilename && this.isPathIgnored(resolvedFilename)) {
870 results.push(createIgnoreResult(resolvedFilename, cwd));
873 const config = configArrayFactory.getConfigArrayForFile(
874 resolvedFilename || "__placeholder__.js"
878 * Store used configs for:
879 * - this method uses to collect used deprecated rules.
880 * - `getRules()` method uses to collect all loaded rules.
881 * - `--fix-type` option uses to get the loaded rule's meta data.
883 lastConfigArrays.push(config);
886 results.push(verifyText({
888 filePath: resolvedFilename,
893 reportUnusedDisableDirectives,
894 extensionRegExp: fileEnumerator.extensionRegExp,
899 // Collect used deprecated rules.
900 const usedDeprecatedRules = Array.from(
901 iterateRuleDeprecationWarnings(lastConfigArrays)
904 debug(`Linting complete in: ${Date.now() - startTime}ms`);
907 ...calculateStatsPerRun(results),
913 * Returns a configuration object for the given file based on the CLI options.
914 * This is the same logic used by the ESLint CLI executable to determine
915 * configuration for each file it processes.
916 * @param {string} filePath The path of the file to retrieve a config object for.
917 * @returns {ConfigData} A configuration object for the file.
919 getConfigForFile(filePath) {
920 const { configArrayFactory, options } = internalSlotsMap.get(this);
921 const absolutePath = path.resolve(options.cwd, filePath);
923 if (directoryExists(absolutePath)) {
925 new Error("'filePath' should not be a directory path."),
926 { messageTemplate: "print-config-with-directory-path" }
930 return configArrayFactory
931 .getConfigArrayForFile(absolutePath)
932 .extractConfig(absolutePath)
933 .toCompatibleObjectAsConfigFileContent();
937 * Checks if a given path is ignored by ESLint.
938 * @param {string} filePath The path of the file to check.
939 * @returns {boolean} Whether or not the given path is ignored.
941 isPathIgnored(filePath) {
945 options: { cwd, ignore }
946 } = internalSlotsMap.get(this);
947 const absolutePath = path.resolve(cwd, filePath);
950 const config = configArrayFactory
951 .getConfigArrayForFile(absolutePath)
952 .extractConfig(absolutePath);
953 const ignores = config.ignores || defaultIgnores;
955 return ignores(absolutePath);
958 return defaultIgnores(absolutePath);
962 * Returns the formatter representing the given format or null if no formatter
963 * with the given name can be found.
964 * @param {string} [format] The name of the format to load or the path to a
966 * @returns {Function} The formatter function or null if not found.
968 getFormatter(format) {
970 // default is stylish
971 const resolvedFormatName = format || "stylish";
973 // only strings are valid formatters
974 if (typeof resolvedFormatName === "string") {
976 // replace \ with / for Windows compatibility
977 const normalizedFormatName = resolvedFormatName.replace(/\\/gu, "/");
979 const slots = internalSlotsMap.get(this);
980 const cwd = slots ? slots.options.cwd : process.cwd();
981 const namespace = naming.getNamespaceFromTerm(normalizedFormatName);
985 // if there's a slash, then it's a file (TODO: this check seems dubious for scoped npm packages)
986 if (!namespace && normalizedFormatName.indexOf("/") > -1) {
987 formatterPath = path.resolve(cwd, normalizedFormatName);
990 const npmFormat = naming.normalizePackageName(normalizedFormatName, "eslint-formatter");
992 formatterPath = ModuleResolver.resolve(npmFormat, path.join(cwd, "__placeholder__.js"));
994 formatterPath = path.resolve(__dirname, "formatters", normalizedFormatName);
999 return require(formatterPath);
1001 ex.message = `There was a problem loading formatter: ${formatterPath}\nError: ${ex.message}`;
1011 CLIEngine.version = pkg.version;
1012 CLIEngine.getFormatter = CLIEngine.prototype.getFormatter;
1018 * Get the internal slots of a given CLIEngine instance for tests.
1019 * @param {CLIEngine} instance The CLIEngine instance to get.
1020 * @returns {CLIEngineInternalSlots} The internal slots.
1022 getCLIEngineInternalSlots(instance) {
1023 return internalSlotsMap.get(instance);