/
eslint-helpers.js
644 lines (556 loc) Β· 22.1 KB
/
eslint-helpers.js
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/**
* @fileoverview Helper functions for ESLint class
* @author Nicholas C. Zakas
*/
"use strict";
//-----------------------------------------------------------------------------
// Requirements
//-----------------------------------------------------------------------------
const path = require("path");
const fs = require("fs");
const fsp = fs.promises;
const isGlob = require("is-glob");
const globby = require("globby");
const hash = require("../cli-engine/hash");
const minimatch = require("minimatch");
//-----------------------------------------------------------------------------
// Errors
//-----------------------------------------------------------------------------
/**
* The error type when no files match a glob.
*/
class NoFilesFoundError extends Error {
/**
* @param {string} pattern The glob pattern which was not found.
* @param {boolean} globEnabled If `false` then the pattern was a glob pattern, but glob was disabled.
*/
constructor(pattern, globEnabled) {
super(`No files matching '${pattern}' were found${!globEnabled ? " (glob was disabled)" : ""}.`);
this.messageTemplate = "file-not-found";
this.messageData = { pattern, globDisabled: !globEnabled };
}
}
/**
* The error type when there are files matched by a glob, but all of them have been ignored.
*/
class AllFilesIgnoredError extends Error {
/**
* @param {string} pattern The glob pattern which was not found.
*/
constructor(pattern) {
super(`All files matched by '${pattern}' are ignored.`);
this.messageTemplate = "all-files-ignored";
this.messageData = { pattern };
}
}
//-----------------------------------------------------------------------------
// General Helpers
//-----------------------------------------------------------------------------
/**
* Check if a given value is a non-empty string or not.
* @param {any} x The value to check.
* @returns {boolean} `true` if `x` is a non-empty string.
*/
function isNonEmptyString(x) {
return typeof x === "string" && x.trim() !== "";
}
/**
* Check if a given value is an array of non-empty stringss or not.
* @param {any} x The value to check.
* @returns {boolean} `true` if `x` is an array of non-empty stringss.
*/
function isArrayOfNonEmptyString(x) {
return Array.isArray(x) && x.every(isNonEmptyString);
}
//-----------------------------------------------------------------------------
// File-related Helpers
//-----------------------------------------------------------------------------
/**
* Normalizes slashes in a file pattern to posix-style.
* @param {string} pattern The pattern to replace slashes in.
* @returns {string} The pattern with slashes normalized.
*/
function normalizeToPosix(pattern) {
return pattern.replace(/\\/gu, "/");
}
/**
* Check if a string is a glob pattern or not.
* @param {string} pattern A glob pattern.
* @returns {boolean} `true` if the string is a glob pattern.
*/
function isGlobPattern(pattern) {
return isGlob(path.sep === "\\" ? normalizeToPosix(pattern) : pattern);
}
/**
* Finds all files matching the options specified.
* @param {Object} args The arguments objects.
* @param {Array<string>} args.patterns An array of glob patterns.
* @param {boolean} args.globInputPaths true to interpret glob patterns,
* false to not interpret glob patterns.
* @param {string} args.cwd The current working directory to find from.
* @param {FlatConfigArray} args.configs The configs for the current run.
* @param {boolean} args.errorOnUnmatchedPattern Determines if an unmatched pattern
* should throw an error.
* @returns {Promise<Array<string>>} The fully resolved file paths.
* @throws {AllFilesIgnoredError} If there are no results due to an ignore pattern.
* @throws {NoFilesFoundError} If no files matched the given patterns.
*/
async function findFiles({
patterns,
globInputPaths,
cwd,
configs,
errorOnUnmatchedPattern
}) {
const results = [];
const globbyPatterns = [];
const missingPatterns = [];
// check to see if we have explicit files and directories
const filePaths = patterns.map(filePath => path.resolve(cwd, filePath));
const stats = await Promise.all(
filePaths.map(
filePath => fsp.stat(filePath).catch(() => { })
)
);
stats.forEach((stat, index) => {
const filePath = filePaths[index];
const pattern = normalizeToPosix(patterns[index]);
if (stat) {
// files are added directly to the list
if (stat.isFile()) {
results.push({
filePath,
ignored: configs.isIgnored(filePath)
});
}
// directories need extensions attached
if (stat.isDirectory()) {
// filePatterns are all relative to cwd
const filePatterns = configs.files
.filter(filePattern => {
// can only do this for strings, not functions
if (typeof filePattern !== "string") {
return false;
}
// patterns starting with ** always apply
if (filePattern.startsWith("**")) {
return true;
}
// patterns ending with * are not used for file search
if (filePattern.endsWith("*")) {
return false;
}
// not sure how to handle negated patterns yet
if (filePattern.startsWith("!")) {
return false;
}
// check if the pattern would be inside the config base path or not
const fullFilePattern = path.join(cwd, filePattern);
const patternRelativeToConfigBasePath = path.relative(configs.basePath, fullFilePattern);
if (patternRelativeToConfigBasePath.startsWith("..")) {
return false;
}
// check if the pattern matches
if (minimatch(filePath, path.dirname(fullFilePattern), { partial: true })) {
return true;
}
// check if the pattern is inside the directory or not
const patternRelativeToFilePath = path.relative(filePath, fullFilePattern);
if (patternRelativeToFilePath.startsWith("..")) {
return false;
}
return true;
})
.map(filePattern => {
if (filePattern.startsWith("**")) {
return path.join(pattern, filePattern);
}
// adjust the path to be relative to the cwd
return path.relative(
cwd,
path.join(configs.basePath, filePattern)
);
})
.map(normalizeToPosix);
if (filePatterns.length) {
globbyPatterns.push(...filePatterns);
}
}
return;
}
// save patterns for later use based on whether globs are enabled
if (globInputPaths && isGlobPattern(filePath)) {
globbyPatterns.push(pattern);
} else {
missingPatterns.push(pattern);
}
});
// note: globbyPatterns can be an empty array
const globbyResults = (await globby(globbyPatterns, {
cwd,
absolute: true,
ignore: configs.ignores.filter(matcher => typeof matcher === "string")
}));
// if there are no results, tell the user why
if (!results.length && !globbyResults.length) {
// try globby without ignoring anything
/* eslint-disable no-unreachable-loop -- We want to exit early. */
for (const globbyPattern of globbyPatterns) {
/* eslint-disable-next-line no-unused-vars -- Want to exit early. */
for await (const filePath of globby.stream(globbyPattern, { cwd, absolute: true })) {
// files were found but ignored
throw new AllFilesIgnoredError(globbyPattern);
}
// no files were found
if (errorOnUnmatchedPattern) {
throw new NoFilesFoundError(globbyPattern, globInputPaths);
}
}
/* eslint-enable no-unreachable-loop -- Go back to normal. */
}
// there were patterns that didn't match anything, tell the user
if (errorOnUnmatchedPattern && missingPatterns.length) {
throw new NoFilesFoundError(missingPatterns[0], globInputPaths);
}
return [
...results,
...globbyResults.map(filePath => ({
filePath: path.resolve(filePath),
ignored: false
}))
];
}
/**
* Checks whether a file exists at the given location
* @param {string} resolvedPath A path from the CWD
* @throws {Error} As thrown by `fs.statSync` or `fs.isFile`.
* @returns {boolean} `true` if a file exists
*/
function fileExists(resolvedPath) {
try {
return fs.statSync(resolvedPath).isFile();
} catch (error) {
if (error && (error.code === "ENOENT" || error.code === "ENOTDIR")) {
return false;
}
throw error;
}
}
/**
* Checks whether a directory exists at the given location
* @param {string} resolvedPath A path from the CWD
* @throws {Error} As thrown by `fs.statSync` or `fs.isDirectory`.
* @returns {boolean} `true` if a directory exists
*/
function directoryExists(resolvedPath) {
try {
return fs.statSync(resolvedPath).isDirectory();
} catch (error) {
if (error && (error.code === "ENOENT" || error.code === "ENOTDIR")) {
return false;
}
throw error;
}
}
//-----------------------------------------------------------------------------
// Results-related Helpers
//-----------------------------------------------------------------------------
/**
* Checks if the given message is an error message.
* @param {LintMessage} message The message to check.
* @returns {boolean} Whether or not the message is an error message.
* @private
*/
function isErrorMessage(message) {
return message.severity === 2;
}
/**
* Returns result with warning by ignore settings
* @param {string} filePath File path of checked code
* @param {string} baseDir Absolute path of base directory
* @returns {LintResult} Result with single warning
* @private
*/
function createIgnoreResult(filePath, baseDir) {
let message;
const isHidden = filePath.split(path.sep)
.find(segment => /^\./u.test(segment));
const isInNodeModules = baseDir && path.relative(baseDir, filePath).startsWith("node_modules");
if (isHidden) {
message = "File ignored by default. Use a negated ignore pattern (like \"--ignore-pattern '!<relative/path/to/filename>'\") to override.";
} else if (isInNodeModules) {
message = "File ignored by default. Use \"--ignore-pattern '!node_modules/*'\" to override.";
} else {
message = "File ignored because of a matching ignore pattern. Use \"--no-ignore\" to override.";
}
return {
filePath: path.resolve(filePath),
messages: [
{
fatal: false,
severity: 1,
message
}
],
suppressedMessages: [],
errorCount: 0,
warningCount: 1,
fatalErrorCount: 0,
fixableErrorCount: 0,
fixableWarningCount: 0
};
}
//-----------------------------------------------------------------------------
// Options-related Helpers
//-----------------------------------------------------------------------------
/**
* Check if a given value is a valid fix type or not.
* @param {any} x The value to check.
* @returns {boolean} `true` if `x` is valid fix type.
*/
function isFixType(x) {
return x === "directive" || x === "problem" || x === "suggestion" || x === "layout";
}
/**
* Check if a given value is an array of fix types or not.
* @param {any} x The value to check.
* @returns {boolean} `true` if `x` is an array of fix types.
*/
function isFixTypeArray(x) {
return Array.isArray(x) && x.every(isFixType);
}
/**
* The error for invalid options.
*/
class ESLintInvalidOptionsError extends Error {
constructor(messages) {
super(`Invalid Options:\n- ${messages.join("\n- ")}`);
this.code = "ESLINT_INVALID_OPTIONS";
Error.captureStackTrace(this, ESLintInvalidOptionsError);
}
}
/**
* Validates and normalizes options for the wrapped CLIEngine instance.
* @param {FlatESLintOptions} options The options to process.
* @throws {ESLintInvalidOptionsError} If of any of a variety of type errors.
* @returns {FlatESLintOptions} The normalized options.
*/
function processOptions({
allowInlineConfig = true, // β we cannot use `overrideConfig.noInlineConfig` instead because `allowInlineConfig` has side-effect that suppress warnings that show inline configs are ignored.
baseConfig = null,
cache = false,
cacheLocation = ".eslintcache",
cacheStrategy = "metadata",
cwd = process.cwd(),
errorOnUnmatchedPattern = true,
fix = false,
fixTypes = null, // β should be null by default because if it's an array then it suppresses rules that don't have the `meta.type` property.
globInputPaths = true,
ignore = true,
ignorePath = null, // β should be null by default because if it's a string then it may throw ENOENT.
ignorePatterns = null,
overrideConfig = null,
overrideConfigFile = null,
plugins = {},
reportUnusedDisableDirectives = null, // β should be null by default because if it's a string then it overrides the 'reportUnusedDisableDirectives' setting in config files. And we cannot use `overrideConfig.reportUnusedDisableDirectives` instead because we cannot configure the `error` severity with that.
...unknownOptions
}) {
const errors = [];
const unknownOptionKeys = Object.keys(unknownOptions);
if (unknownOptionKeys.length >= 1) {
errors.push(`Unknown options: ${unknownOptionKeys.join(", ")}`);
if (unknownOptionKeys.includes("cacheFile")) {
errors.push("'cacheFile' has been removed. Please use the 'cacheLocation' option instead.");
}
if (unknownOptionKeys.includes("configFile")) {
errors.push("'configFile' has been removed. Please use the 'overrideConfigFile' option instead.");
}
if (unknownOptionKeys.includes("envs")) {
errors.push("'envs' has been removed.");
}
if (unknownOptionKeys.includes("extensions")) {
errors.push("'extensions' has been removed.");
}
if (unknownOptionKeys.includes("resolvePluginsRelativeTo")) {
errors.push("'resolvePluginsRelativeTo' has been removed.");
}
if (unknownOptionKeys.includes("globals")) {
errors.push("'globals' has been removed. Please use the 'overrideConfig.languageOptions.globals' option instead.");
}
if (unknownOptionKeys.includes("ignorePattern")) {
errors.push("'ignorePattern' has been removed. Please use the 'overrideConfig.ignorePatterns' option instead.");
}
if (unknownOptionKeys.includes("parser")) {
errors.push("'parser' has been removed. Please use the 'overrideConfig.languageOptions.parser' option instead.");
}
if (unknownOptionKeys.includes("parserOptions")) {
errors.push("'parserOptions' has been removed. Please use the 'overrideConfig.languageOptions.parserOptions' option instead.");
}
if (unknownOptionKeys.includes("rules")) {
errors.push("'rules' has been removed. Please use the 'overrideConfig.rules' option instead.");
}
if (unknownOptionKeys.includes("rulePaths")) {
errors.push("'rulePaths' has been removed. Please define your rules using plugins.");
}
}
if (typeof allowInlineConfig !== "boolean") {
errors.push("'allowInlineConfig' must be a boolean.");
}
if (typeof baseConfig !== "object") {
errors.push("'baseConfig' must be an object or null.");
}
if (typeof cache !== "boolean") {
errors.push("'cache' must be a boolean.");
}
if (!isNonEmptyString(cacheLocation)) {
errors.push("'cacheLocation' must be a non-empty string.");
}
if (
cacheStrategy !== "metadata" &&
cacheStrategy !== "content"
) {
errors.push("'cacheStrategy' must be any of \"metadata\", \"content\".");
}
if (!isNonEmptyString(cwd) || !path.isAbsolute(cwd)) {
errors.push("'cwd' must be an absolute path.");
}
if (typeof errorOnUnmatchedPattern !== "boolean") {
errors.push("'errorOnUnmatchedPattern' must be a boolean.");
}
if (typeof fix !== "boolean" && typeof fix !== "function") {
errors.push("'fix' must be a boolean or a function.");
}
if (fixTypes !== null && !isFixTypeArray(fixTypes)) {
errors.push("'fixTypes' must be an array of any of \"directive\", \"problem\", \"suggestion\", and \"layout\".");
}
if (typeof globInputPaths !== "boolean") {
errors.push("'globInputPaths' must be a boolean.");
}
if (typeof ignore !== "boolean") {
errors.push("'ignore' must be a boolean.");
}
if (!isNonEmptyString(ignorePath) && ignorePath !== null) {
errors.push("'ignorePath' must be a non-empty string or null.");
}
if (typeof overrideConfig !== "object") {
errors.push("'overrideConfig' must be an object or null.");
}
if (!isNonEmptyString(overrideConfigFile) && overrideConfigFile !== null && overrideConfigFile !== true) {
errors.push("'overrideConfigFile' must be a non-empty string, null, or true.");
}
if (typeof plugins !== "object") {
errors.push("'plugins' must be an object or null.");
} else if (plugins !== null && Object.keys(plugins).includes("")) {
errors.push("'plugins' must not include an empty string.");
}
if (Array.isArray(plugins)) {
errors.push("'plugins' doesn't add plugins to configuration to load. Please use the 'overrideConfig.plugins' option instead.");
}
if (
reportUnusedDisableDirectives !== "error" &&
reportUnusedDisableDirectives !== "warn" &&
reportUnusedDisableDirectives !== "off" &&
reportUnusedDisableDirectives !== null
) {
errors.push("'reportUnusedDisableDirectives' must be any of \"error\", \"warn\", \"off\", and null.");
}
if (errors.length > 0) {
throw new ESLintInvalidOptionsError(errors);
}
return {
allowInlineConfig,
baseConfig,
cache,
cacheLocation,
cacheStrategy,
// when overrideConfigFile is true that means don't do config file lookup
configFile: overrideConfigFile === true ? false : overrideConfigFile,
overrideConfig,
cwd,
errorOnUnmatchedPattern,
fix,
fixTypes,
globInputPaths,
ignore,
ignorePath,
ignorePatterns,
reportUnusedDisableDirectives
};
}
//-----------------------------------------------------------------------------
// Cache-related helpers
//-----------------------------------------------------------------------------
/**
* return the cacheFile to be used by eslint, based on whether the provided parameter is
* a directory or looks like a directory (ends in `path.sep`), in which case the file
* name will be the `cacheFile/.cache_hashOfCWD`
*
* if cacheFile points to a file or looks like a file then in will just use that file
* @param {string} cacheFile The name of file to be used to store the cache
* @param {string} cwd Current working directory
* @returns {string} the resolved path to the cache file
*/
function getCacheFile(cacheFile, cwd) {
/*
* make sure the path separators are normalized for the environment/os
* keeping the trailing path separator if present
*/
const normalizedCacheFile = path.normalize(cacheFile);
const resolvedCacheFile = path.resolve(cwd, normalizedCacheFile);
const looksLikeADirectory = normalizedCacheFile.slice(-1) === path.sep;
/**
* return the name for the cache file in case the provided parameter is a directory
* @returns {string} the resolved path to the cacheFile
*/
function getCacheFileForDirectory() {
return path.join(resolvedCacheFile, `.cache_${hash(cwd)}`);
}
let fileStats;
try {
fileStats = fs.lstatSync(resolvedCacheFile);
} catch {
fileStats = null;
}
/*
* in case the file exists we need to verify if the provided path
* is a directory or a file. If it is a directory we want to create a file
* inside that directory
*/
if (fileStats) {
/*
* is a directory or is a file, but the original file the user provided
* looks like a directory but `path.resolve` removed the `last path.sep`
* so we need to still treat this like a directory
*/
if (fileStats.isDirectory() || looksLikeADirectory) {
return getCacheFileForDirectory();
}
// is file so just use that file
return resolvedCacheFile;
}
/*
* here we known the file or directory doesn't exist,
* so we will try to infer if its a directory if it looks like a directory
* for the current operating system.
*/
// if the last character passed is a path separator we assume is a directory
if (looksLikeADirectory) {
return getCacheFileForDirectory();
}
return resolvedCacheFile;
}
//-----------------------------------------------------------------------------
// Exports
//-----------------------------------------------------------------------------
module.exports = {
isGlobPattern,
directoryExists,
fileExists,
findFiles,
isNonEmptyString,
isArrayOfNonEmptyString,
createIgnoreResult,
isErrorMessage,
processOptions,
getCacheFile
};