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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 hash = require("../cli-engine/hash");
const minimatch = require("minimatch");
const fswalk = require("@nodelib/fs.walk");
const globParent = require("glob-parent");
const isPathInside = require("is-path-inside");
//-----------------------------------------------------------------------------
// Fixup references
//-----------------------------------------------------------------------------
const Minimatch = minimatch.Minimatch;
const MINIMATCH_OPTIONS = { dot: true };
//-----------------------------------------------------------------------------
// Types
//-----------------------------------------------------------------------------
/**
* @typedef {Object} GlobSearch
* @property {Array<string>} patterns The normalized patterns to use for a search.
* @property {Array<string>} rawPatterns The patterns as entered by the user
* before doing any normalization.
*/
//-----------------------------------------------------------------------------
// 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 a search fails to match multiple patterns.
*/
class UnmatchedSearchPatternsError extends Error {
/**
* @param {Object} options The options for the error.
* @param {string} options.basePath The directory that was searched.
* @param {Array<string>} options.unmatchedPatterns The glob patterns
* which were not found.
* @param {Array<string>} options.patterns The glob patterns that were
* searched.
* @param {Array<string>} options.rawPatterns The raw glob patterns that
* were searched.
*/
constructor({ basePath, unmatchedPatterns, patterns, rawPatterns }) {
super(`No files matching '${rawPatterns}' in '${basePath}' were found.`);
this.basePath = basePath;
this.unmatchedPatterns = unmatchedPatterns;
this.patterns = patterns;
this.rawPatterns = rawPatterns;
}
}
/**
* 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 strings or not.
* @param {any} x The value to check.
* @returns {boolean} `true` if `x` is an array of non-empty strings.
*/
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);
}
/**
* Determines if a given glob pattern will return any results.
* Used primarily to help with useful error messages.
* @param {Object} options The options for the function.
* @param {string} options.basePath The directory to search.
* @param {string} options.pattern A glob pattern to match.
* @returns {Promise<boolean>} True if there is a glob match, false if not.
*/
function globMatch({ basePath, pattern }) {
let found = false;
const patternToUse = path.isAbsolute(pattern)
? normalizeToPosix(path.relative(basePath, pattern))
: pattern;
const matcher = new Minimatch(patternToUse, MINIMATCH_OPTIONS);
const fsWalkSettings = {
deepFilter(entry) {
const relativePath = normalizeToPosix(path.relative(basePath, entry.path));
return !found && matcher.match(relativePath, true);
},
entryFilter(entry) {
if (found || entry.dirent.isDirectory()) {
return false;
}
const relativePath = normalizeToPosix(path.relative(basePath, entry.path));
if (matcher.match(relativePath)) {
found = true;
return true;
}
return false;
}
};
return new Promise(resolve => {
// using a stream so we can exit early because we just need one match
const globStream = fswalk.walkStream(basePath, fsWalkSettings);
globStream.on("data", () => {
globStream.destroy();
resolve(true);
});
// swallow errors as they're not important here
globStream.on("error", () => { });
globStream.on("end", () => {
resolve(false);
});
globStream.read();
});
}
/**
* Searches a directory looking for matching glob patterns. This uses
* the config array's logic to determine if a directory or file should
* be ignored, so it is consistent with how ignoring works throughout
* ESLint.
* @param {Object} options The options for this function.
* @param {string} options.basePath The directory to search.
* @param {Array<string>} options.patterns An array of glob patterns
* to match.
* @param {Array<string>} options.rawPatterns An array of glob patterns
* as the user inputted them. Used for errors.
* @param {FlatConfigArray} options.configs The config array to use for
* determining what to ignore.
* @param {boolean} options.errorOnUnmatchedPattern Determines if an error
* should be thrown when a pattern is unmatched.
* @returns {Promise<Array<string>>} An array of matching file paths
* or an empty array if there are no matches.
* @throws {UnmatchedSearchPatternsError} If there is a pattern that doesn't
* match any files.
*/
async function globSearch({
basePath,
patterns,
rawPatterns,
configs,
errorOnUnmatchedPattern
}) {
if (patterns.length === 0) {
return [];
}
/*
* In this section we are converting the patterns into Minimatch
* instances for performance reasons. Because we are doing the same
* matches repeatedly, it's best to compile those patterns once and
* reuse them multiple times.
*
* To do that, we convert any patterns with an absolute path into a
* relative path and normalize it to Posix-style slashes. We also keep
* track of the relative patterns to map them back to the original
* patterns, which we need in order to throw an error if there are any
* unmatched patterns.
*/
const relativeToPatterns = new Map();
const matchers = patterns.map((pattern, i) => {
const patternToUse = path.isAbsolute(pattern)
? normalizeToPosix(path.relative(basePath, pattern))
: pattern;
relativeToPatterns.set(patternToUse, patterns[i]);
return new Minimatch(patternToUse, MINIMATCH_OPTIONS);
});
/*
* We track unmatched patterns because we may want to throw an error when
* they occur. To start, this set is initialized with all of the patterns.
* Every time a match occurs, the pattern is removed from the set, making
* it easy to tell if we have any unmatched patterns left at the end of
* search.
*/
const unmatchedPatterns = new Set([...relativeToPatterns.keys()]);
const filePaths = (await new Promise((resolve, reject) => {
let promiseRejected = false;
/**
* Wraps a boolean-returning filter function. The wrapped function will reject the promise if an error occurs.
* @param {Function} filter A filter function to wrap.
* @returns {Function} A function similar to the wrapped filter that rejects the promise if an error occurs.
*/
function wrapFilter(filter) {
return (...args) => {
// No need to run the filter if an error has been thrown.
if (!promiseRejected) {
try {
return filter(...args);
} catch (error) {
promiseRejected = true;
reject(error);
}
}
return false;
};
}
fswalk.walk(
basePath,
{
deepFilter: wrapFilter(entry => {
const relativePath = normalizeToPosix(path.relative(basePath, entry.path));
const matchesPattern = matchers.some(matcher => matcher.match(relativePath, true));
return matchesPattern && !configs.isDirectoryIgnored(entry.path);
}),
entryFilter: wrapFilter(entry => {
const relativePath = normalizeToPosix(path.relative(basePath, entry.path));
// entries may be directories or files so filter out directories
if (entry.dirent.isDirectory()) {
return false;
}
/*
* Optimization: We need to track when patterns are left unmatched
* and so we use `unmatchedPatterns` to do that. There is a bit of
* complexity here because the same file can be matched by more than
* one pattern. So, when we start, we actually need to test every
* pattern against every file. Once we know there are no remaining
* unmatched patterns, then we can switch to just looking for the
* first matching pattern for improved speed.
*/
const matchesPattern = unmatchedPatterns.size > 0
? matchers.reduce((previousValue, matcher) => {
const pathMatches = matcher.match(relativePath);
/*
* We updated the unmatched patterns set only if the path
* matches and the file isn't ignored. If the file is
* ignored, that means there wasn't a match for the
* pattern so it should not be removed.
*
* Performance note: isFileIgnored() aggressively caches
* results so there is no performance penalty for calling
* it twice with the same argument.
*/
if (pathMatches && !configs.isFileIgnored(entry.path)) {
unmatchedPatterns.delete(matcher.pattern);
}
return pathMatches || previousValue;
}, false)
: matchers.some(matcher => matcher.match(relativePath));
return matchesPattern && !configs.isFileIgnored(entry.path);
})
},
(error, entries) => {
// If the promise is already rejected, calling `resolve` or `reject` will do nothing.
if (error) {
reject(error);
} else {
resolve(entries);
}
}
);
})).map(entry => entry.path);
// now check to see if we have any unmatched patterns
if (errorOnUnmatchedPattern && unmatchedPatterns.size > 0) {
throw new UnmatchedSearchPatternsError({
basePath,
unmatchedPatterns: [...unmatchedPatterns].map(
pattern => relativeToPatterns.get(pattern)
),
patterns,
rawPatterns
});
}
return filePaths;
}
/**
* Throws an error for unmatched patterns. The error will only contain information about the first one.
* Checks to see if there are any ignored results for a given search.
* @param {Object} options The options for this function.
* @param {string} options.basePath The directory to search.
* @param {Array<string>} options.patterns An array of glob patterns
* that were used in the original search.
* @param {Array<string>} options.rawPatterns An array of glob patterns
* as the user inputted them. Used for errors.
* @param {Array<string>} options.unmatchedPatterns A non-empty array of glob patterns
* that were unmatched in the original search.
* @returns {void} Always throws an error.
* @throws {NoFilesFoundError} If the first unmatched pattern
* doesn't match any files even when there are no ignores.
* @throws {AllFilesIgnoredError} If the first unmatched pattern
* matches some files when there are no ignores.
*/
async function throwErrorForUnmatchedPatterns({
basePath,
patterns,
rawPatterns,
unmatchedPatterns
}) {
const pattern = unmatchedPatterns[0];
const rawPattern = rawPatterns[patterns.indexOf(pattern)];
const patternHasMatch = await globMatch({
basePath,
pattern
});
if (patternHasMatch) {
throw new AllFilesIgnoredError(rawPattern);
}
// if we get here there are truly no matches
throw new NoFilesFoundError(rawPattern, true);
}
/**
* Performs multiple glob searches in parallel.
* @param {Object} options The options for this function.
* @param {Map<string,GlobSearch>} options.searches
* An array of glob patterns to match.
* @param {FlatConfigArray} options.configs The config array to use for
* determining what to ignore.
* @param {boolean} options.errorOnUnmatchedPattern Determines if an
* unmatched glob pattern should throw an error.
* @returns {Promise<Array<string>>} An array of matching file paths
* or an empty array if there are no matches.
*/
async function globMultiSearch({ searches, configs, errorOnUnmatchedPattern }) {
/*
* For convenience, we normalized the search map into an array of objects.
* Next, we filter out all searches that have no patterns. This happens
* primarily for the cwd, which is prepopulated in the searches map as an
* optimization. However, if it has no patterns, it means all patterns
* occur outside of the cwd and we can safely filter out that search.
*/
const normalizedSearches = [...searches].map(
([basePath, { patterns, rawPatterns }]) => ({ basePath, patterns, rawPatterns })
).filter(({ patterns }) => patterns.length > 0);
const results = await Promise.allSettled(
normalizedSearches.map(
({ basePath, patterns, rawPatterns }) => globSearch({
basePath,
patterns,
rawPatterns,
configs,
errorOnUnmatchedPattern
})
)
);
const filePaths = [];
for (let i = 0; i < results.length; i++) {
const result = results[i];
const currentSearch = normalizedSearches[i];
if (result.status === "fulfilled") {
// if the search was successful just add the results
if (result.value.length > 0) {
filePaths.push(...result.value);
}
continue;
}
// if we make it here then there was an error
const error = result.reason;
// unexpected errors should be re-thrown
if (!error.basePath) {
throw error;
}
if (errorOnUnmatchedPattern) {
await throwErrorForUnmatchedPatterns({
...currentSearch,
unmatchedPatterns: error.unmatchedPatterns
});
}
}
return filePaths;
}
/**
* 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 missingPatterns = [];
let globbyPatterns = [];
let rawPatterns = [];
const searches = new Map([[cwd, { patterns: globbyPatterns, rawPatterns: [] }]]);
// 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);
}
// directories need extensions attached
if (stat.isDirectory()) {
// group everything in cwd together and split out others
if (isPathInside(filePath, cwd)) {
({ patterns: globbyPatterns, rawPatterns } = searches.get(cwd));
} else {
if (!searches.has(filePath)) {
searches.set(filePath, { patterns: [], rawPatterns: [] });
}
({ patterns: globbyPatterns, rawPatterns } = searches.get(filePath));
}
globbyPatterns.push(`${normalizeToPosix(filePath)}/**`);
rawPatterns.push(pattern);
}
return;
}
// save patterns for later use based on whether globs are enabled
if (globInputPaths && isGlobPattern(pattern)) {
const basePath = path.resolve(cwd, globParent(pattern));
// group in cwd if possible and split out others
if (isPathInside(basePath, cwd)) {
({ patterns: globbyPatterns, rawPatterns } = searches.get(cwd));
} else {
if (!searches.has(basePath)) {
searches.set(basePath, { patterns: [], rawPatterns: [] });
}
({ patterns: globbyPatterns, rawPatterns } = searches.get(basePath));
}
globbyPatterns.push(filePath);
rawPatterns.push(pattern);
} else {
missingPatterns.push(pattern);
}
});
// there were patterns that didn't match anything, tell the user
if (errorOnUnmatchedPattern && missingPatterns.length) {
throw new NoFilesFoundError(missingPatterns[0], globInputPaths);
}
// now we are safe to do the search
const globbyResults = await globMultiSearch({
searches,
configs,
errorOnUnmatchedPattern
});
return [
...new Set([
...results,
...globbyResults.map(filePath => path.resolve(filePath))
])
];
}
//-----------------------------------------------------------------------------
// 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 isInNodeModules = baseDir && path.dirname(path.relative(baseDir, filePath)).split(path.sep).includes("node_modules");
if (isInNodeModules) {
message = "File ignored by default because it is located under the node_modules directory. Use ignore pattern \"!**/node_modules/\" to disable file ignore settings or use \"--no-warn-ignored\" to suppress this warning.";
} else {
message = "File ignored because of a matching ignore pattern. Use \"--no-ignore\" to disable file ignore settings or use \"--no-warn-ignored\" to suppress this warning.";
}
return {
filePath: path.resolve(filePath),
messages: [
{
ruleId: null,
fatal: false,
severity: 1,
message,
nodeType: null
}
],
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, // ← 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, // ← 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,
ignorePatterns = null,
overrideConfig = null,
overrideConfigFile = null,
plugins = {},
warnIgnored = true,
...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("ignorePath")) {
errors.push("'ignorePath' has been removed.");
}
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 (unknownOptionKeys.includes("reportUnusedDisableDirectives")) {
errors.push("'reportUnusedDisableDirectives' has been removed. Please use the 'overrideConfig.linterOptions.reportUnusedDisableDirectives' option instead.");
}
}
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 (!isArrayOfNonEmptyString(ignorePatterns) && ignorePatterns !== null) {
errors.push("'ignorePatterns' must be an array of non-empty strings 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 (typeof warnIgnored !== "boolean") {
errors.push("'warnIgnored' must be a boolean.");
}
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: path.normalize(cwd),
errorOnUnmatchedPattern,
fix,
fixTypes,
globInputPaths,
ignore,
ignorePatterns,
warnIgnored
};
}
//-----------------------------------------------------------------------------
// 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,
findFiles,
isNonEmptyString,
isArrayOfNonEmptyString,
createIgnoreResult,
isErrorMessage,
processOptions,
getCacheFile
};