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monjack
2025-06-20 18:01:48 +08:00
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/**
* @fileoverview Used for creating a suggested configuration based on project code.
* @author Ian VanSchooten
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const equal = require("fast-deep-equal"),
recConfig = require("../../conf/eslint-recommended"),
ConfigOps = require("@eslint/eslintrc/lib/shared/config-ops"),
{ Linter } = require("../linter"),
configRule = require("./config-rule");
const debug = require("debug")("eslint:autoconfig");
const linter = new Linter();
//------------------------------------------------------------------------------
// Data
//------------------------------------------------------------------------------
const MAX_CONFIG_COMBINATIONS = 17, // 16 combinations + 1 for severity only
RECOMMENDED_CONFIG_NAME = "eslint:recommended";
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
/**
* Information about a rule configuration, in the context of a Registry.
* @typedef {Object} registryItem
* @param {ruleConfig} config A valid configuration for the rule
* @param {number} specificity The number of elements in the ruleConfig array
* @param {number} errorCount The number of errors encountered when linting with the config
*/
/**
* This callback is used to measure execution status in a progress bar
* @callback progressCallback
* @param {number} The total number of times the callback will be called.
*/
/**
* Create registryItems for rules
* @param {rulesConfig} rulesConfig Hash of rule names and arrays of ruleConfig items
* @returns {Object} registryItems for each rule in provided rulesConfig
*/
function makeRegistryItems(rulesConfig) {
return Object.keys(rulesConfig).reduce((accumulator, ruleId) => {
accumulator[ruleId] = rulesConfig[ruleId].map(config => ({
config,
specificity: config.length || 1,
errorCount: void 0
}));
return accumulator;
}, {});
}
/**
* Creates an object in which to store rule configs and error counts
*
* Unless a rulesConfig is provided at construction, the registry will not contain
* any rules, only methods. This will be useful for building up registries manually.
*
* Registry class
*/
class Registry {
// eslint-disable-next-line jsdoc/require-description
/**
* @param {rulesConfig} [rulesConfig] Hash of rule names and arrays of possible configurations
*/
constructor(rulesConfig) {
this.rules = (rulesConfig) ? makeRegistryItems(rulesConfig) : {};
}
/**
* Populate the registry with core rule configs.
*
* It will set the registry's `rule` property to an object having rule names
* as keys and an array of registryItems as values.
* @returns {void}
*/
populateFromCoreRules() {
const rulesConfig = configRule.createCoreRuleConfigs(/* noDeprecated = */ true);
this.rules = makeRegistryItems(rulesConfig);
}
/**
* Creates sets of rule configurations which can be used for linting
* and initializes registry errors to zero for those configurations (side effect).
*
* This combines as many rules together as possible, such that the first sets
* in the array will have the highest number of rules configured, and later sets
* will have fewer and fewer, as not all rules have the same number of possible
* configurations.
*
* The length of the returned array will be <= MAX_CONFIG_COMBINATIONS.
* @returns {Object[]} "rules" configurations to use for linting
*/
buildRuleSets() {
let idx = 0;
const ruleIds = Object.keys(this.rules),
ruleSets = [];
/**
* Add a rule configuration from the registry to the ruleSets
*
* This is broken out into its own function so that it doesn't need to be
* created inside of the while loop.
* @param {string} rule The ruleId to add.
* @returns {void}
*/
const addRuleToRuleSet = function(rule) {
/*
* This check ensures that there is a rule configuration and that
* it has fewer than the max combinations allowed.
* If it has too many configs, we will only use the most basic of
* the possible configurations.
*/
const hasFewCombos = (this.rules[rule].length <= MAX_CONFIG_COMBINATIONS);
if (this.rules[rule][idx] && (hasFewCombos || this.rules[rule][idx].specificity <= 2)) {
/*
* If the rule has too many possible combinations, only take
* simple ones, avoiding objects.
*/
if (!hasFewCombos && typeof this.rules[rule][idx].config[1] === "object") {
return;
}
ruleSets[idx] = ruleSets[idx] || {};
ruleSets[idx][rule] = this.rules[rule][idx].config;
/*
* Initialize errorCount to zero, since this is a config which
* will be linted.
*/
this.rules[rule][idx].errorCount = 0;
}
}.bind(this);
while (ruleSets.length === idx) {
ruleIds.forEach(addRuleToRuleSet);
idx += 1;
}
return ruleSets;
}
/**
* Remove all items from the registry with a non-zero number of errors
*
* Note: this also removes rule configurations which were not linted
* (meaning, they have an undefined errorCount).
* @returns {void}
*/
stripFailingConfigs() {
const ruleIds = Object.keys(this.rules),
newRegistry = new Registry();
newRegistry.rules = Object.assign({}, this.rules);
ruleIds.forEach(ruleId => {
const errorFreeItems = newRegistry.rules[ruleId].filter(registryItem => (registryItem.errorCount === 0));
if (errorFreeItems.length > 0) {
newRegistry.rules[ruleId] = errorFreeItems;
} else {
delete newRegistry.rules[ruleId];
}
});
return newRegistry;
}
/**
* Removes rule configurations which were not included in a ruleSet
* @returns {void}
*/
stripExtraConfigs() {
const ruleIds = Object.keys(this.rules),
newRegistry = new Registry();
newRegistry.rules = Object.assign({}, this.rules);
ruleIds.forEach(ruleId => {
newRegistry.rules[ruleId] = newRegistry.rules[ruleId].filter(registryItem => (typeof registryItem.errorCount !== "undefined"));
});
return newRegistry;
}
/**
* Creates a registry of rules which had no error-free configs.
* The new registry is intended to be analyzed to determine whether its rules
* should be disabled or set to warning.
* @returns {Registry} A registry of failing rules.
*/
getFailingRulesRegistry() {
const ruleIds = Object.keys(this.rules),
failingRegistry = new Registry();
ruleIds.forEach(ruleId => {
const failingConfigs = this.rules[ruleId].filter(registryItem => (registryItem.errorCount > 0));
if (failingConfigs && failingConfigs.length === this.rules[ruleId].length) {
failingRegistry.rules[ruleId] = failingConfigs;
}
});
return failingRegistry;
}
/**
* Create an eslint config for any rules which only have one configuration
* in the registry.
* @returns {Object} An eslint config with rules section populated
*/
createConfig() {
const ruleIds = Object.keys(this.rules),
config = { rules: {} };
ruleIds.forEach(ruleId => {
if (this.rules[ruleId].length === 1) {
config.rules[ruleId] = this.rules[ruleId][0].config;
}
});
return config;
}
/**
* Return a cloned registry containing only configs with a desired specificity
* @param {number} specificity Only keep configs with this specificity
* @returns {Registry} A registry of rules
*/
filterBySpecificity(specificity) {
const ruleIds = Object.keys(this.rules),
newRegistry = new Registry();
newRegistry.rules = Object.assign({}, this.rules);
ruleIds.forEach(ruleId => {
newRegistry.rules[ruleId] = this.rules[ruleId].filter(registryItem => (registryItem.specificity === specificity));
});
return newRegistry;
}
/**
* Lint SourceCodes against all configurations in the registry, and record results
* @param {Object[]} sourceCodes SourceCode objects for each filename
* @param {Object} config ESLint config object
* @param {progressCallback} [cb] Optional callback for reporting execution status
* @returns {Registry} New registry with errorCount populated
*/
lintSourceCode(sourceCodes, config, cb) {
let lintedRegistry = new Registry();
lintedRegistry.rules = Object.assign({}, this.rules);
const ruleSets = lintedRegistry.buildRuleSets();
lintedRegistry = lintedRegistry.stripExtraConfigs();
debug("Linting with all possible rule combinations");
const filenames = Object.keys(sourceCodes);
const totalFilesLinting = filenames.length * ruleSets.length;
filenames.forEach(filename => {
debug(`Linting file: ${filename}`);
let ruleSetIdx = 0;
ruleSets.forEach(ruleSet => {
const lintConfig = Object.assign({}, config, { rules: ruleSet });
const lintResults = linter.verify(sourceCodes[filename], lintConfig);
lintResults.forEach(result => {
/*
* It is possible that the error is from a configuration comment
* in a linted file, in which case there may not be a config
* set in this ruleSetIdx.
* (https://github.com/eslint/eslint/issues/5992)
* (https://github.com/eslint/eslint/issues/7860)
*/
if (
lintedRegistry.rules[result.ruleId] &&
lintedRegistry.rules[result.ruleId][ruleSetIdx]
) {
lintedRegistry.rules[result.ruleId][ruleSetIdx].errorCount += 1;
}
});
ruleSetIdx += 1;
if (cb) {
cb(totalFilesLinting); // eslint-disable-line node/callback-return
}
});
// Deallocate for GC
sourceCodes[filename] = null;
});
return lintedRegistry;
}
}
/**
* Extract rule configuration into eslint:recommended where possible.
*
* This will return a new config with `["extends": [ ..., "eslint:recommended"]` and
* only the rules which have configurations different from the recommended config.
* @param {Object} config config object
* @returns {Object} config object using `"extends": ["eslint:recommended"]`
*/
function extendFromRecommended(config) {
const newConfig = Object.assign({}, config);
ConfigOps.normalizeToStrings(newConfig);
const recRules = Object.keys(recConfig.rules).filter(ruleId => ConfigOps.isErrorSeverity(recConfig.rules[ruleId]));
recRules.forEach(ruleId => {
if (equal(recConfig.rules[ruleId], newConfig.rules[ruleId])) {
delete newConfig.rules[ruleId];
}
});
newConfig.extends.unshift(RECOMMENDED_CONFIG_NAME);
return newConfig;
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
module.exports = {
Registry,
extendFromRecommended
};

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/**
* @fileoverview Helper to locate and load configuration files.
* @author Nicholas C. Zakas
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const fs = require("fs"),
path = require("path"),
stringify = require("json-stable-stringify-without-jsonify");
const debug = require("debug")("eslint:config-file");
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
/**
* Determines sort order for object keys for json-stable-stringify
*
* see: https://github.com/samn/json-stable-stringify#cmp
* @param {Object} a The first comparison object ({key: akey, value: avalue})
* @param {Object} b The second comparison object ({key: bkey, value: bvalue})
* @returns {number} 1 or -1, used in stringify cmp method
*/
function sortByKey(a, b) {
return a.key > b.key ? 1 : -1;
}
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
/**
* Writes a configuration file in JSON format.
* @param {Object} config The configuration object to write.
* @param {string} filePath The filename to write to.
* @returns {void}
* @private
*/
function writeJSONConfigFile(config, filePath) {
debug(`Writing JSON config file: ${filePath}`);
const content = `${stringify(config, { cmp: sortByKey, space: 4 })}\n`;
fs.writeFileSync(filePath, content, "utf8");
}
/**
* Writes a configuration file in YAML format.
* @param {Object} config The configuration object to write.
* @param {string} filePath The filename to write to.
* @returns {void}
* @private
*/
function writeYAMLConfigFile(config, filePath) {
debug(`Writing YAML config file: ${filePath}`);
// lazy load YAML to improve performance when not used
const yaml = require("js-yaml");
const content = yaml.safeDump(config, { sortKeys: true });
fs.writeFileSync(filePath, content, "utf8");
}
/**
* Writes a configuration file in JavaScript format.
* @param {Object} config The configuration object to write.
* @param {string} filePath The filename to write to.
* @throws {Error} If an error occurs linting the config file contents.
* @returns {void}
* @private
*/
function writeJSConfigFile(config, filePath) {
debug(`Writing JS config file: ${filePath}`);
let contentToWrite;
const stringifiedContent = `module.exports = ${stringify(config, { cmp: sortByKey, space: 4 })};\n`;
try {
const { CLIEngine } = require("../cli-engine");
const linter = new CLIEngine({
baseConfig: config,
fix: true,
useEslintrc: false
});
const report = linter.executeOnText(stringifiedContent);
contentToWrite = report.results[0].output || stringifiedContent;
} catch (e) {
debug("Error linting JavaScript config file, writing unlinted version");
const errorMessage = e.message;
contentToWrite = stringifiedContent;
e.message = "An error occurred while generating your JavaScript config file. ";
e.message += "A config file was still generated, but the config file itself may not follow your linting rules.";
e.message += `\nError: ${errorMessage}`;
throw e;
} finally {
fs.writeFileSync(filePath, contentToWrite, "utf8");
}
}
/**
* Writes a configuration file.
* @param {Object} config The configuration object to write.
* @param {string} filePath The filename to write to.
* @returns {void}
* @throws {Error} When an unknown file type is specified.
* @private
*/
function write(config, filePath) {
switch (path.extname(filePath)) {
case ".js":
case ".cjs":
writeJSConfigFile(config, filePath);
break;
case ".json":
writeJSONConfigFile(config, filePath);
break;
case ".yaml":
case ".yml":
writeYAMLConfigFile(config, filePath);
break;
default:
throw new Error("Can't write to unknown file type.");
}
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
module.exports = {
write
};

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/**
* @fileoverview Config initialization wizard.
* @author Ilya Volodin
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const util = require("util"),
path = require("path"),
fs = require("fs"),
enquirer = require("enquirer"),
ProgressBar = require("progress"),
semver = require("semver"),
espree = require("espree"),
recConfig = require("../../conf/eslint-recommended"),
ConfigOps = require("@eslint/eslintrc/lib/shared/config-ops"),
log = require("../shared/logging"),
naming = require("@eslint/eslintrc/lib/shared/naming"),
ModuleResolver = require("../shared/relative-module-resolver"),
autoconfig = require("./autoconfig.js"),
ConfigFile = require("./config-file"),
npmUtils = require("./npm-utils"),
{ getSourceCodeOfFiles } = require("./source-code-utils");
const debug = require("debug")("eslint:config-initializer");
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
/* istanbul ignore next: hard to test fs function */
/**
* Create .eslintrc file in the current working directory
* @param {Object} config object that contains user's answers
* @param {string} format The file format to write to.
* @returns {void}
*/
function writeFile(config, format) {
// default is .js
let extname = ".js";
if (format === "YAML") {
extname = ".yml";
} else if (format === "JSON") {
extname = ".json";
} else if (format === "JavaScript") {
const pkgJSONPath = npmUtils.findPackageJson();
if (pkgJSONPath) {
const pkgJSONContents = JSON.parse(fs.readFileSync(pkgJSONPath, "utf8"));
if (pkgJSONContents.type === "module") {
extname = ".cjs";
}
}
}
const installedESLint = config.installedESLint;
delete config.installedESLint;
ConfigFile.write(config, `./.eslintrc${extname}`);
log.info(`Successfully created .eslintrc${extname} file in ${process.cwd()}`);
if (installedESLint) {
log.info("ESLint was installed locally. We recommend using this local copy instead of your globally-installed copy.");
}
}
/**
* Get the peer dependencies of the given module.
* This adds the gotten value to cache at the first time, then reuses it.
* In a process, this function is called twice, but `npmUtils.fetchPeerDependencies` needs to access network which is relatively slow.
* @param {string} moduleName The module name to get.
* @returns {Object} The peer dependencies of the given module.
* This object is the object of `peerDependencies` field of `package.json`.
* Returns null if npm was not found.
*/
function getPeerDependencies(moduleName) {
let result = getPeerDependencies.cache.get(moduleName);
if (!result) {
log.info(`Checking peerDependencies of ${moduleName}`);
result = npmUtils.fetchPeerDependencies(moduleName);
getPeerDependencies.cache.set(moduleName, result);
}
return result;
}
getPeerDependencies.cache = new Map();
/**
* Return necessary plugins, configs, parsers, etc. based on the config
* @param {Object} config config object
* @param {boolean} [installESLint=true] If `false` is given, it does not install eslint.
* @returns {string[]} An array of modules to be installed.
*/
function getModulesList(config, installESLint) {
const modules = {};
// Create a list of modules which should be installed based on config
if (config.plugins) {
for (const plugin of config.plugins) {
const moduleName = naming.normalizePackageName(plugin, "eslint-plugin");
modules[moduleName] = "latest";
}
}
if (config.extends) {
const extendList = Array.isArray(config.extends) ? config.extends : [config.extends];
for (const extend of extendList) {
if (extend.startsWith("eslint:") || extend.startsWith("plugin:")) {
continue;
}
const moduleName = naming.normalizePackageName(extend, "eslint-config");
modules[moduleName] = "latest";
Object.assign(
modules,
getPeerDependencies(`${moduleName}@latest`)
);
}
}
const parser = config.parser || (config.parserOptions && config.parserOptions.parser);
if (parser) {
modules[parser] = "latest";
}
if (installESLint === false) {
delete modules.eslint;
} else {
const installStatus = npmUtils.checkDevDeps(["eslint"]);
// Mark to show messages if it's new installation of eslint.
if (installStatus.eslint === false) {
log.info("Local ESLint installation not found.");
modules.eslint = modules.eslint || "latest";
config.installedESLint = true;
}
}
return Object.keys(modules).map(name => `${name}@${modules[name]}`);
}
/**
* Set the `rules` of a config by examining a user's source code
*
* Note: This clones the config object and returns a new config to avoid mutating
* the original config parameter.
* @param {Object} answers answers received from enquirer
* @param {Object} config config object
* @returns {Object} config object with configured rules
*/
function configureRules(answers, config) {
const BAR_TOTAL = 20,
BAR_SOURCE_CODE_TOTAL = 4,
newConfig = Object.assign({}, config),
disabledConfigs = {};
let sourceCodes,
registry;
// Set up a progress bar, as this process can take a long time
const bar = new ProgressBar("Determining Config: :percent [:bar] :elapseds elapsed, eta :etas ", {
width: 30,
total: BAR_TOTAL
});
bar.tick(0); // Shows the progress bar
// Get the SourceCode of all chosen files
const patterns = answers.patterns.split(/[\s]+/u);
try {
sourceCodes = getSourceCodeOfFiles(patterns, { baseConfig: newConfig, useEslintrc: false }, total => {
bar.tick((BAR_SOURCE_CODE_TOTAL / total));
});
} catch (e) {
log.info("\n");
throw e;
}
const fileQty = Object.keys(sourceCodes).length;
if (fileQty === 0) {
log.info("\n");
throw new Error("Automatic Configuration failed. No files were able to be parsed.");
}
// Create a registry of rule configs
registry = new autoconfig.Registry();
registry.populateFromCoreRules();
// Lint all files with each rule config in the registry
registry = registry.lintSourceCode(sourceCodes, newConfig, total => {
bar.tick((BAR_TOTAL - BAR_SOURCE_CODE_TOTAL) / total); // Subtract out ticks used at beginning
});
debug(`\nRegistry: ${util.inspect(registry.rules, { depth: null })}`);
// Create a list of recommended rules, because we don't want to disable them
const recRules = Object.keys(recConfig.rules).filter(ruleId => ConfigOps.isErrorSeverity(recConfig.rules[ruleId]));
// Find and disable rules which had no error-free configuration
const failingRegistry = registry.getFailingRulesRegistry();
Object.keys(failingRegistry.rules).forEach(ruleId => {
// If the rule is recommended, set it to error, otherwise disable it
disabledConfigs[ruleId] = (recRules.indexOf(ruleId) !== -1) ? 2 : 0;
});
// Now that we know which rules to disable, strip out configs with errors
registry = registry.stripFailingConfigs();
/*
* If there is only one config that results in no errors for a rule, we should use it.
* createConfig will only add rules that have one configuration in the registry.
*/
const singleConfigs = registry.createConfig().rules;
/*
* The "sweet spot" for number of options in a config seems to be two (severity plus one option).
* Very often, a third option (usually an object) is available to address
* edge cases, exceptions, or unique situations. We will prefer to use a config with
* specificity of two.
*/
const specTwoConfigs = registry.filterBySpecificity(2).createConfig().rules;
// Maybe a specific combination using all three options works
const specThreeConfigs = registry.filterBySpecificity(3).createConfig().rules;
// If all else fails, try to use the default (severity only)
const defaultConfigs = registry.filterBySpecificity(1).createConfig().rules;
// Combine configs in reverse priority order (later take precedence)
newConfig.rules = Object.assign({}, disabledConfigs, defaultConfigs, specThreeConfigs, specTwoConfigs, singleConfigs);
// Make sure progress bar has finished (floating point rounding)
bar.update(BAR_TOTAL);
// Log out some stats to let the user know what happened
const finalRuleIds = Object.keys(newConfig.rules);
const totalRules = finalRuleIds.length;
const enabledRules = finalRuleIds.filter(ruleId => (newConfig.rules[ruleId] !== 0)).length;
const resultMessage = [
`\nEnabled ${enabledRules} out of ${totalRules}`,
`rules based on ${fileQty}`,
`file${(fileQty === 1) ? "." : "s."}`
].join(" ");
log.info(resultMessage);
ConfigOps.normalizeToStrings(newConfig);
return newConfig;
}
/**
* process user's answers and create config object
* @param {Object} answers answers received from enquirer
* @returns {Object} config object
*/
function processAnswers(answers) {
let config = {
rules: {},
env: {},
parserOptions: {},
extends: []
};
config.parserOptions.ecmaVersion = espree.latestEcmaVersion;
config.env.es2021 = true;
// set the module type
if (answers.moduleType === "esm") {
config.parserOptions.sourceType = "module";
} else if (answers.moduleType === "commonjs") {
config.env.commonjs = true;
}
// add in browser and node environments if necessary
answers.env.forEach(env => {
config.env[env] = true;
});
// add in library information
if (answers.framework === "react") {
config.parserOptions.ecmaFeatures = {
jsx: true
};
config.plugins = ["react"];
config.extends.push("plugin:react/recommended");
} else if (answers.framework === "vue") {
config.plugins = ["vue"];
config.extends.push("plugin:vue/essential");
}
if (answers.typescript) {
if (answers.framework === "vue") {
config.parserOptions.parser = "@typescript-eslint/parser";
} else {
config.parser = "@typescript-eslint/parser";
}
if (Array.isArray(config.plugins)) {
config.plugins.push("@typescript-eslint");
} else {
config.plugins = ["@typescript-eslint"];
}
}
// setup rules based on problems/style enforcement preferences
if (answers.purpose === "problems") {
config.extends.unshift("eslint:recommended");
} else if (answers.purpose === "style") {
if (answers.source === "prompt") {
config.extends.unshift("eslint:recommended");
config.rules.indent = ["error", answers.indent];
config.rules.quotes = ["error", answers.quotes];
config.rules["linebreak-style"] = ["error", answers.linebreak];
config.rules.semi = ["error", answers.semi ? "always" : "never"];
} else if (answers.source === "auto") {
config = configureRules(answers, config);
config = autoconfig.extendFromRecommended(config);
}
}
if (answers.typescript && config.extends.includes("eslint:recommended")) {
config.extends.push("plugin:@typescript-eslint/recommended");
}
// normalize extends
if (config.extends.length === 0) {
delete config.extends;
} else if (config.extends.length === 1) {
config.extends = config.extends[0];
}
ConfigOps.normalizeToStrings(config);
return config;
}
/**
* Get the version of the local ESLint.
* @returns {string|null} The version. If the local ESLint was not found, returns null.
*/
function getLocalESLintVersion() {
try {
const eslintPath = ModuleResolver.resolve("eslint", path.join(process.cwd(), "__placeholder__.js"));
const eslint = require(eslintPath);
return eslint.linter.version || null;
} catch {
return null;
}
}
/**
* Get the shareable config name of the chosen style guide.
* @param {Object} answers The answers object.
* @returns {string} The shareable config name.
*/
function getStyleGuideName(answers) {
if (answers.styleguide === "airbnb" && answers.framework !== "react") {
return "airbnb-base";
}
return answers.styleguide;
}
/**
* Check whether the local ESLint version conflicts with the required version of the chosen shareable config.
* @param {Object} answers The answers object.
* @returns {boolean} `true` if the local ESLint is found then it conflicts with the required version of the chosen shareable config.
*/
function hasESLintVersionConflict(answers) {
// Get the local ESLint version.
const localESLintVersion = getLocalESLintVersion();
if (!localESLintVersion) {
return false;
}
// Get the required range of ESLint version.
const configName = getStyleGuideName(answers);
const moduleName = `eslint-config-${configName}@latest`;
const peerDependencies = getPeerDependencies(moduleName) || {};
const requiredESLintVersionRange = peerDependencies.eslint;
if (!requiredESLintVersionRange) {
return false;
}
answers.localESLintVersion = localESLintVersion;
answers.requiredESLintVersionRange = requiredESLintVersionRange;
// Check the version.
if (semver.satisfies(localESLintVersion, requiredESLintVersionRange)) {
answers.installESLint = false;
return false;
}
return true;
}
/**
* Install modules.
* @param {string[]} modules Modules to be installed.
* @returns {void}
*/
function installModules(modules) {
log.info(`Installing ${modules.join(", ")}`);
npmUtils.installSyncSaveDev(modules);
}
/* istanbul ignore next: no need to test enquirer */
/**
* Ask user to install modules.
* @param {string[]} modules Array of modules to be installed.
* @param {boolean} packageJsonExists Indicates if package.json is existed.
* @returns {Promise} Answer that indicates if user wants to install.
*/
function askInstallModules(modules, packageJsonExists) {
// If no modules, do nothing.
if (modules.length === 0) {
return Promise.resolve();
}
log.info("The config that you've selected requires the following dependencies:\n");
log.info(modules.join(" "));
return enquirer.prompt([
{
type: "toggle",
name: "executeInstallation",
message: "Would you like to install them now with npm?",
enabled: "Yes",
disabled: "No",
initial: 1,
skip() {
return !(modules.length && packageJsonExists);
},
result(input) {
return this.skipped ? null : input;
}
}
]).then(({ executeInstallation }) => {
if (executeInstallation) {
installModules(modules);
}
});
}
/* istanbul ignore next: no need to test enquirer */
/**
* Ask use a few questions on command prompt
* @returns {Promise} The promise with the result of the prompt
*/
function promptUser() {
return enquirer.prompt([
{
type: "select",
name: "purpose",
message: "How would you like to use ESLint?",
// The returned number matches the name value of nth in the choices array.
initial: 1,
choices: [
{ message: "To check syntax only", name: "syntax" },
{ message: "To check syntax and find problems", name: "problems" },
{ message: "To check syntax, find problems, and enforce code style", name: "style" }
]
},
{
type: "select",
name: "moduleType",
message: "What type of modules does your project use?",
initial: 0,
choices: [
{ message: "JavaScript modules (import/export)", name: "esm" },
{ message: "CommonJS (require/exports)", name: "commonjs" },
{ message: "None of these", name: "none" }
]
},
{
type: "select",
name: "framework",
message: "Which framework does your project use?",
initial: 0,
choices: [
{ message: "React", name: "react" },
{ message: "Vue.js", name: "vue" },
{ message: "None of these", name: "none" }
]
},
{
type: "toggle",
name: "typescript",
message: "Does your project use TypeScript?",
enabled: "Yes",
disabled: "No",
initial: 0
},
{
type: "multiselect",
name: "env",
message: "Where does your code run?",
hint: "(Press <space> to select, <a> to toggle all, <i> to invert selection)",
initial: 0,
choices: [
{ message: "Browser", name: "browser" },
{ message: "Node", name: "node" }
]
},
{
type: "select",
name: "source",
message: "How would you like to define a style for your project?",
choices: [
{ message: "Use a popular style guide", name: "guide" },
{ message: "Answer questions about your style", name: "prompt" },
{ message: "Inspect your JavaScript file(s)", name: "auto" }
],
skip() {
return this.state.answers.purpose !== "style";
},
result(input) {
return this.skipped ? null : input;
}
},
{
type: "select",
name: "styleguide",
message: "Which style guide do you want to follow?",
choices: [
{ message: "Airbnb: https://github.com/airbnb/javascript", name: "airbnb" },
{ message: "Standard: https://github.com/standard/standard", name: "standard" },
{ message: "Google: https://github.com/google/eslint-config-google", name: "google" },
{ message: "XO: https://github.com/xojs/eslint-config-xo", name: "xo" }
],
skip() {
this.state.answers.packageJsonExists = npmUtils.checkPackageJson();
return !(this.state.answers.source === "guide" && this.state.answers.packageJsonExists);
},
result(input) {
return this.skipped ? null : input;
}
},
{
type: "input",
name: "patterns",
message: "Which file(s), path(s), or glob(s) should be examined?",
skip() {
return this.state.answers.source !== "auto";
},
validate(input) {
if (!this.skipped && input.trim().length === 0 && input.trim() !== ",") {
return "You must tell us what code to examine. Try again.";
}
return true;
}
},
{
type: "select",
name: "format",
message: "What format do you want your config file to be in?",
initial: 0,
choices: ["JavaScript", "YAML", "JSON"]
},
{
type: "toggle",
name: "installESLint",
message() {
const { answers } = this.state;
const verb = semver.ltr(answers.localESLintVersion, answers.requiredESLintVersionRange)
? "upgrade"
: "downgrade";
return `The style guide "${answers.styleguide}" requires eslint@${answers.requiredESLintVersionRange}. You are currently using eslint@${answers.localESLintVersion}.\n Do you want to ${verb}?`;
},
enabled: "Yes",
disabled: "No",
initial: 1,
skip() {
return !(this.state.answers.source === "guide" && this.state.answers.packageJsonExists && hasESLintVersionConflict(this.state.answers));
},
result(input) {
return this.skipped ? null : input;
}
}
]).then(earlyAnswers => {
// early exit if no style guide is necessary
if (earlyAnswers.purpose !== "style") {
const config = processAnswers(earlyAnswers);
const modules = getModulesList(config);
return askInstallModules(modules, earlyAnswers.packageJsonExists)
.then(() => writeFile(config, earlyAnswers.format));
}
// early exit if you are using a style guide
if (earlyAnswers.source === "guide") {
if (!earlyAnswers.packageJsonExists) {
log.info("A package.json is necessary to install plugins such as style guides. Run `npm init` to create a package.json file and try again.");
return void 0;
}
if (earlyAnswers.installESLint === false && !semver.satisfies(earlyAnswers.localESLintVersion, earlyAnswers.requiredESLintVersionRange)) {
log.info(`Note: it might not work since ESLint's version is mismatched with the ${earlyAnswers.styleguide} config.`);
}
if (earlyAnswers.styleguide === "airbnb" && earlyAnswers.framework !== "react") {
earlyAnswers.styleguide = "airbnb-base";
}
const config = processAnswers(earlyAnswers);
if (Array.isArray(config.extends)) {
config.extends.push(earlyAnswers.styleguide);
} else if (config.extends) {
config.extends = [config.extends, earlyAnswers.styleguide];
} else {
config.extends = [earlyAnswers.styleguide];
}
const modules = getModulesList(config);
return askInstallModules(modules, earlyAnswers.packageJsonExists)
.then(() => writeFile(config, earlyAnswers.format));
}
if (earlyAnswers.source === "auto") {
const combinedAnswers = Object.assign({}, earlyAnswers);
const config = processAnswers(combinedAnswers);
const modules = getModulesList(config);
return askInstallModules(modules).then(() => writeFile(config, earlyAnswers.format));
}
// continue with the style questions otherwise...
return enquirer.prompt([
{
type: "select",
name: "indent",
message: "What style of indentation do you use?",
initial: 0,
choices: [{ message: "Tabs", name: "tab" }, { message: "Spaces", name: 4 }]
},
{
type: "select",
name: "quotes",
message: "What quotes do you use for strings?",
initial: 0,
choices: [{ message: "Double", name: "double" }, { message: "Single", name: "single" }]
},
{
type: "select",
name: "linebreak",
message: "What line endings do you use?",
initial: 0,
choices: [{ message: "Unix", name: "unix" }, { message: "Windows", name: "windows" }]
},
{
type: "toggle",
name: "semi",
message: "Do you require semicolons?",
enabled: "Yes",
disabled: "No",
initial: 1
}
]).then(answers => {
const totalAnswers = Object.assign({}, earlyAnswers, answers);
const config = processAnswers(totalAnswers);
const modules = getModulesList(config);
return askInstallModules(modules).then(() => writeFile(config, earlyAnswers.format));
});
});
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
const init = {
getModulesList,
hasESLintVersionConflict,
installModules,
processAnswers,
writeFile,
/* istanbul ignore next */initializeConfig() {
return promptUser();
}
};
module.exports = init;

317
app_vue/node_modules/eslint/lib/init/config-rule.js generated vendored Normal file
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/**
* @fileoverview Create configurations for a rule
* @author Ian VanSchooten
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const builtInRules = require("../rules");
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
/**
* Wrap all of the elements of an array into arrays.
* @param {*[]} xs Any array.
* @returns {Array[]} An array of arrays.
*/
function explodeArray(xs) {
return xs.reduce((accumulator, x) => {
accumulator.push([x]);
return accumulator;
}, []);
}
/**
* Mix two arrays such that each element of the second array is concatenated
* onto each element of the first array.
*
* For example:
* combineArrays([a, [b, c]], [x, y]); // -> [[a, x], [a, y], [b, c, x], [b, c, y]]
* @param {Array} arr1 The first array to combine.
* @param {Array} arr2 The second array to combine.
* @returns {Array} A mixture of the elements of the first and second arrays.
*/
function combineArrays(arr1, arr2) {
const res = [];
if (arr1.length === 0) {
return explodeArray(arr2);
}
if (arr2.length === 0) {
return explodeArray(arr1);
}
arr1.forEach(x1 => {
arr2.forEach(x2 => {
res.push([].concat(x1, x2));
});
});
return res;
}
/**
* Group together valid rule configurations based on object properties
*
* e.g.:
* groupByProperty([
* {before: true},
* {before: false},
* {after: true},
* {after: false}
* ]);
*
* will return:
* [
* [{before: true}, {before: false}],
* [{after: true}, {after: false}]
* ]
* @param {Object[]} objects Array of objects, each with one property/value pair
* @returns {Array[]} Array of arrays of objects grouped by property
*/
function groupByProperty(objects) {
const groupedObj = objects.reduce((accumulator, obj) => {
const prop = Object.keys(obj)[0];
accumulator[prop] = accumulator[prop] ? accumulator[prop].concat(obj) : [obj];
return accumulator;
}, {});
return Object.keys(groupedObj).map(prop => groupedObj[prop]);
}
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
/**
* Configuration settings for a rule.
*
* A configuration can be a single number (severity), or an array where the first
* element in the array is the severity, and is the only required element.
* Configs may also have one or more additional elements to specify rule
* configuration or options.
* @typedef {Array|number} ruleConfig
* @param {number} 0 The rule's severity (0, 1, 2).
*/
/**
* Object whose keys are rule names and values are arrays of valid ruleConfig items
* which should be linted against the target source code to determine error counts.
* (a ruleConfigSet.ruleConfigs).
*
* e.g. rulesConfig = {
* "comma-dangle": [2, [2, "always"], [2, "always-multiline"], [2, "never"]],
* "no-console": [2]
* }
* @typedef rulesConfig
*/
/**
* Create valid rule configurations by combining two arrays,
* with each array containing multiple objects each with a
* single property/value pair and matching properties.
*
* e.g.:
* combinePropertyObjects(
* [{before: true}, {before: false}],
* [{after: true}, {after: false}]
* );
*
* will return:
* [
* {before: true, after: true},
* {before: true, after: false},
* {before: false, after: true},
* {before: false, after: false}
* ]
* @param {Object[]} objArr1 Single key/value objects, all with the same key
* @param {Object[]} objArr2 Single key/value objects, all with another key
* @returns {Object[]} Combined objects for each combination of input properties and values
*/
function combinePropertyObjects(objArr1, objArr2) {
const res = [];
if (objArr1.length === 0) {
return objArr2;
}
if (objArr2.length === 0) {
return objArr1;
}
objArr1.forEach(obj1 => {
objArr2.forEach(obj2 => {
const combinedObj = {};
const obj1Props = Object.keys(obj1);
const obj2Props = Object.keys(obj2);
obj1Props.forEach(prop1 => {
combinedObj[prop1] = obj1[prop1];
});
obj2Props.forEach(prop2 => {
combinedObj[prop2] = obj2[prop2];
});
res.push(combinedObj);
});
});
return res;
}
/**
* Creates a new instance of a rule configuration set
*
* A rule configuration set is an array of configurations that are valid for a
* given rule. For example, the configuration set for the "semi" rule could be:
*
* ruleConfigSet.ruleConfigs // -> [[2], [2, "always"], [2, "never"]]
*
* Rule configuration set class
*/
class RuleConfigSet {
// eslint-disable-next-line jsdoc/require-description
/**
* @param {ruleConfig[]} configs Valid rule configurations
*/
constructor(configs) {
/**
* Stored valid rule configurations for this instance
* @type {Array}
*/
this.ruleConfigs = configs || [];
}
/**
* Add a severity level to the front of all configs in the instance.
* This should only be called after all configs have been added to the instance.
* @returns {void}
*/
addErrorSeverity() {
const severity = 2;
this.ruleConfigs = this.ruleConfigs.map(config => {
config.unshift(severity);
return config;
});
// Add a single config at the beginning consisting of only the severity
this.ruleConfigs.unshift(severity);
}
/**
* Add rule configs from an array of strings (schema enums)
* @param {string[]} enums Array of valid rule options (e.g. ["always", "never"])
* @returns {void}
*/
addEnums(enums) {
this.ruleConfigs = this.ruleConfigs.concat(combineArrays(this.ruleConfigs, enums));
}
/**
* Add rule configurations from a schema object
* @param {Object} obj Schema item with type === "object"
* @returns {boolean} true if at least one schema for the object could be generated, false otherwise
*/
addObject(obj) {
const objectConfigSet = {
objectConfigs: [],
add(property, values) {
for (let idx = 0; idx < values.length; idx++) {
const optionObj = {};
optionObj[property] = values[idx];
this.objectConfigs.push(optionObj);
}
},
combine() {
this.objectConfigs = groupByProperty(this.objectConfigs).reduce((accumulator, objArr) => combinePropertyObjects(accumulator, objArr), []);
}
};
/*
* The object schema could have multiple independent properties.
* If any contain enums or booleans, they can be added and then combined
*/
Object.keys(obj.properties).forEach(prop => {
if (obj.properties[prop].enum) {
objectConfigSet.add(prop, obj.properties[prop].enum);
}
if (obj.properties[prop].type && obj.properties[prop].type === "boolean") {
objectConfigSet.add(prop, [true, false]);
}
});
objectConfigSet.combine();
if (objectConfigSet.objectConfigs.length > 0) {
this.ruleConfigs = this.ruleConfigs.concat(combineArrays(this.ruleConfigs, objectConfigSet.objectConfigs));
return true;
}
return false;
}
}
/**
* Generate valid rule configurations based on a schema object
* @param {Object} schema A rule's schema object
* @returns {Array[]} Valid rule configurations
*/
function generateConfigsFromSchema(schema) {
const configSet = new RuleConfigSet();
if (Array.isArray(schema)) {
for (const opt of schema) {
if (opt.enum) {
configSet.addEnums(opt.enum);
} else if (opt.type && opt.type === "object") {
if (!configSet.addObject(opt)) {
break;
}
// TODO (IanVS): support oneOf
} else {
// If we don't know how to fill in this option, don't fill in any of the following options.
break;
}
}
}
configSet.addErrorSeverity();
return configSet.ruleConfigs;
}
/**
* Generate possible rule configurations for all of the core rules
* @param {boolean} noDeprecated Indicates whether ignores deprecated rules or not.
* @returns {rulesConfig} Hash of rule names and arrays of possible configurations
*/
function createCoreRuleConfigs(noDeprecated = false) {
return Array.from(builtInRules).reduce((accumulator, [id, rule]) => {
const schema = (typeof rule === "function") ? rule.schema : rule.meta.schema;
const isDeprecated = (typeof rule === "function") ? rule.deprecated : rule.meta.deprecated;
if (noDeprecated && isDeprecated) {
return accumulator;
}
accumulator[id] = generateConfigsFromSchema(schema);
return accumulator;
}, {});
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
module.exports = {
generateConfigsFromSchema,
createCoreRuleConfigs
};

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app_vue/node_modules/eslint/lib/init/npm-utils.js generated vendored Normal file
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/**
* @fileoverview Utility for executing npm commands.
* @author Ian VanSchooten
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const fs = require("fs"),
spawn = require("cross-spawn"),
path = require("path"),
log = require("../shared/logging");
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
/**
* Find the closest package.json file, starting at process.cwd (by default),
* and working up to root.
* @param {string} [startDir=process.cwd()] Starting directory
* @returns {string} Absolute path to closest package.json file
*/
function findPackageJson(startDir) {
let dir = path.resolve(startDir || process.cwd());
do {
const pkgFile = path.join(dir, "package.json");
if (!fs.existsSync(pkgFile) || !fs.statSync(pkgFile).isFile()) {
dir = path.join(dir, "..");
continue;
}
return pkgFile;
} while (dir !== path.resolve(dir, ".."));
return null;
}
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
/**
* Install node modules synchronously and save to devDependencies in package.json
* @param {string|string[]} packages Node module or modules to install
* @returns {void}
*/
function installSyncSaveDev(packages) {
const packageList = Array.isArray(packages) ? packages : [packages];
const npmProcess = spawn.sync("npm", ["i", "--save-dev"].concat(packageList), { stdio: "inherit" });
const error = npmProcess.error;
if (error && error.code === "ENOENT") {
const pluralS = packageList.length > 1 ? "s" : "";
log.error(`Could not execute npm. Please install the following package${pluralS} with a package manager of your choice: ${packageList.join(", ")}`);
}
}
/**
* Fetch `peerDependencies` of the given package by `npm show` command.
* @param {string} packageName The package name to fetch peerDependencies.
* @returns {Object} Gotten peerDependencies. Returns null if npm was not found.
*/
function fetchPeerDependencies(packageName) {
const npmProcess = spawn.sync(
"npm",
["show", "--json", packageName, "peerDependencies"],
{ encoding: "utf8" }
);
const error = npmProcess.error;
if (error && error.code === "ENOENT") {
return null;
}
const fetchedText = npmProcess.stdout.trim();
return JSON.parse(fetchedText || "{}");
}
/**
* Check whether node modules are include in a project's package.json.
* @param {string[]} packages Array of node module names
* @param {Object} opt Options Object
* @param {boolean} opt.dependencies Set to true to check for direct dependencies
* @param {boolean} opt.devDependencies Set to true to check for development dependencies
* @param {boolean} opt.startdir Directory to begin searching from
* @returns {Object} An object whose keys are the module names
* and values are booleans indicating installation.
*/
function check(packages, opt) {
const deps = new Set();
const pkgJson = (opt) ? findPackageJson(opt.startDir) : findPackageJson();
let fileJson;
if (!pkgJson) {
throw new Error("Could not find a package.json file. Run 'npm init' to create one.");
}
try {
fileJson = JSON.parse(fs.readFileSync(pkgJson, "utf8"));
} catch (e) {
const error = new Error(e);
error.messageTemplate = "failed-to-read-json";
error.messageData = {
path: pkgJson,
message: e.message
};
throw error;
}
["dependencies", "devDependencies"].forEach(key => {
if (opt[key] && typeof fileJson[key] === "object") {
Object.keys(fileJson[key]).forEach(dep => deps.add(dep));
}
});
return packages.reduce((status, pkg) => {
status[pkg] = deps.has(pkg);
return status;
}, {});
}
/**
* Check whether node modules are included in the dependencies of a project's
* package.json.
*
* Convenience wrapper around check().
* @param {string[]} packages Array of node modules to check.
* @param {string} rootDir The directory containing a package.json
* @returns {Object} An object whose keys are the module names
* and values are booleans indicating installation.
*/
function checkDeps(packages, rootDir) {
return check(packages, { dependencies: true, startDir: rootDir });
}
/**
* Check whether node modules are included in the devDependencies of a project's
* package.json.
*
* Convenience wrapper around check().
* @param {string[]} packages Array of node modules to check.
* @returns {Object} An object whose keys are the module names
* and values are booleans indicating installation.
*/
function checkDevDeps(packages) {
return check(packages, { devDependencies: true });
}
/**
* Check whether package.json is found in current path.
* @param {string} [startDir] Starting directory
* @returns {boolean} Whether a package.json is found in current path.
*/
function checkPackageJson(startDir) {
return !!findPackageJson(startDir);
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
module.exports = {
installSyncSaveDev,
fetchPeerDependencies,
findPackageJson,
checkDeps,
checkDevDeps,
checkPackageJson
};

109
app_vue/node_modules/eslint/lib/init/source-code-utils.js generated vendored Normal file
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/**
* @fileoverview Tools for obtaining SourceCode objects.
* @author Ian VanSchooten
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const { CLIEngine } = require("../cli-engine");
/*
* This is used for:
*
* 1. Enumerate target file because we have not expose such a API on `CLIEngine`
* (https://github.com/eslint/eslint/issues/11222).
* 2. Create `SourceCode` instances. Because we don't have any function which
* instantiate `SourceCode` so it needs to take the created `SourceCode`
* instance out after linting.
*
* TODO1: Expose the API that enumerates target files.
* TODO2: Extract the creation logic of `SourceCode` from `Linter` class.
*/
const { getCLIEngineInternalSlots } = require("../cli-engine/cli-engine"); // eslint-disable-line node/no-restricted-require
const debug = require("debug")("eslint:source-code-utils");
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
/**
* Get the SourceCode object for a single file
* @param {string} filename The fully resolved filename to get SourceCode from.
* @param {Object} engine A CLIEngine.
* @returns {Array} Array of the SourceCode object representing the file
* and fatal error message.
*/
function getSourceCodeOfFile(filename, engine) {
debug("getting sourceCode of", filename);
const results = engine.executeOnFiles([filename]);
if (results && results.results[0] && results.results[0].messages[0] && results.results[0].messages[0].fatal) {
const msg = results.results[0].messages[0];
throw new Error(`(${filename}:${msg.line}:${msg.column}) ${msg.message}`);
}
// TODO: extract the logic that creates source code objects to `SourceCode#parse(text, options)` or something like.
const { linter } = getCLIEngineInternalSlots(engine);
const sourceCode = linter.getSourceCode();
return sourceCode;
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
/**
* This callback is used to measure execution status in a progress bar
* @callback progressCallback
* @param {number} The total number of times the callback will be called.
*/
/**
* Gets the SourceCode of a single file, or set of files.
* @param {string[]|string} patterns A filename, directory name, or glob, or an array of them
* @param {Object} options A CLIEngine options object. If not provided, the default cli options will be used.
* @param {progressCallback} callback Callback for reporting execution status
* @returns {Object} The SourceCode of all processed files.
*/
function getSourceCodeOfFiles(patterns, options, callback) {
const sourceCodes = {};
const globPatternsList = typeof patterns === "string" ? [patterns] : patterns;
const engine = new CLIEngine({ ...options, rules: {} });
// TODO: make file iteration as a public API and use it.
const { fileEnumerator } = getCLIEngineInternalSlots(engine);
const filenames =
Array.from(fileEnumerator.iterateFiles(globPatternsList))
.filter(entry => !entry.ignored)
.map(entry => entry.filePath);
if (filenames.length === 0) {
debug(`Did not find any files matching pattern(s): ${globPatternsList}`);
}
filenames.forEach(filename => {
const sourceCode = getSourceCodeOfFile(filename, engine);
if (sourceCode) {
debug("got sourceCode of", filename);
sourceCodes[filename] = sourceCode;
}
if (callback) {
callback(filenames.length); // eslint-disable-line node/callback-return
}
});
return sourceCodes;
}
module.exports = {
getSourceCodeOfFiles
};