309 lines
11 KiB
JavaScript
309 lines
11 KiB
JavaScript
/**
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* @fileoverview Compatibility class for flat config.
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* @author Nicholas C. Zakas
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*/
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"use strict";
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//-----------------------------------------------------------------------------
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// Requirements
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//-----------------------------------------------------------------------------
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const path = require("path");
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const environments = require("../conf/environments");
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const createDebug = require("debug");
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const { ConfigArrayFactory } = require("./config-array-factory");
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//-----------------------------------------------------------------------------
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// Helpers
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//-----------------------------------------------------------------------------
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/** @typedef {import("../../shared/types").Environment} Environment */
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/** @typedef {import("../../shared/types").Processor} Processor */
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const debug = createDebug("eslintrc:flat-compat");
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const cafactory = Symbol("cafactory");
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/**
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* Translates an ESLintRC-style config object into a flag-config-style config
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* object.
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* @param {Object} eslintrcConfig An ESLintRC-style config object.
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* @param {Object} options Options to help translate the config.
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* @param {string} options.resolveConfigRelativeTo To the directory to resolve
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* configs from.
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* @param {string} options.resolvePluginsRelativeTo The directory to resolve
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* plugins from.
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* @param {ReadOnlyMap<string,Environment>} options.pluginEnvironments A map of plugin environment
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* names to objects.
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* @param {ReadOnlyMap<string,Processor>} options.pluginProcessors A map of plugin processor
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* names to objects.
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* @returns {Object} A flag-config-style config object.
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*/
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function translateESLintRC(eslintrcConfig, {
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resolveConfigRelativeTo,
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resolvePluginsRelativeTo,
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pluginEnvironments,
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pluginProcessors
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}) {
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const flatConfig = {};
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const configs = [];
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const languageOptions = {};
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const linterOptions = {};
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const keysToCopy = ["settings", "rules", "processor"];
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const languageOptionsKeysToCopy = ["globals", "parser", "parserOptions"];
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const linterOptionsKeysToCopy = ["noInlineConfig", "reportUnusedDisableDirectives"];
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// check for special settings for eslint:all and eslint:recommended:
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if (eslintrcConfig.settings) {
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if (eslintrcConfig.settings["eslint:all"] === true) {
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return ["eslint:all"];
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}
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if (eslintrcConfig.settings["eslint:recommended"] === true) {
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return ["eslint:recommended"];
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}
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}
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// copy over simple translations
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for (const key of keysToCopy) {
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if (key in eslintrcConfig && typeof eslintrcConfig[key] !== "undefined") {
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flatConfig[key] = eslintrcConfig[key];
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}
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}
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// copy over languageOptions
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for (const key of languageOptionsKeysToCopy) {
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if (key in eslintrcConfig && typeof eslintrcConfig[key] !== "undefined") {
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// create the languageOptions key in the flat config
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flatConfig.languageOptions = languageOptions;
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if (key === "parser") {
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debug(`Resolving parser '${languageOptions[key]}' relative to ${resolveConfigRelativeTo}`);
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if (eslintrcConfig[key].error) {
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throw eslintrcConfig[key].error;
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}
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languageOptions[key] = eslintrcConfig[key].definition;
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continue;
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}
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// clone any object values that are in the eslintrc config
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if (eslintrcConfig[key] && typeof eslintrcConfig[key] === "object") {
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languageOptions[key] = {
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...eslintrcConfig[key]
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};
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} else {
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languageOptions[key] = eslintrcConfig[key];
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}
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}
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}
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// copy over linterOptions
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for (const key of linterOptionsKeysToCopy) {
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if (key in eslintrcConfig && typeof eslintrcConfig[key] !== "undefined") {
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flatConfig.linterOptions = linterOptions;
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linterOptions[key] = eslintrcConfig[key];
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}
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}
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// move ecmaVersion a level up
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if (languageOptions.parserOptions) {
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if ("ecmaVersion" in languageOptions.parserOptions) {
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languageOptions.ecmaVersion = languageOptions.parserOptions.ecmaVersion;
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delete languageOptions.parserOptions.ecmaVersion;
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}
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if ("sourceType" in languageOptions.parserOptions) {
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languageOptions.sourceType = languageOptions.parserOptions.sourceType;
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delete languageOptions.parserOptions.sourceType;
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}
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// check to see if we even need parserOptions anymore and remove it if not
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if (Object.keys(languageOptions.parserOptions).length === 0) {
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delete languageOptions.parserOptions;
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}
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}
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// overrides
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if (eslintrcConfig.criteria) {
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flatConfig.files = [absoluteFilePath => eslintrcConfig.criteria.test(absoluteFilePath)];
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}
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// translate plugins
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if (eslintrcConfig.plugins && typeof eslintrcConfig.plugins === "object") {
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debug(`Translating plugins: ${eslintrcConfig.plugins}`);
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flatConfig.plugins = {};
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for (const pluginName of Object.keys(eslintrcConfig.plugins)) {
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debug(`Translating plugin: ${pluginName}`);
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debug(`Resolving plugin '${pluginName} relative to ${resolvePluginsRelativeTo}`);
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const { definition: plugin, error } = eslintrcConfig.plugins[pluginName];
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if (error) {
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throw error;
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}
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flatConfig.plugins[pluginName] = plugin;
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// create a config for any processors
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if (plugin.processors) {
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for (const processorName of Object.keys(plugin.processors)) {
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if (processorName.startsWith(".")) {
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debug(`Assigning processor: ${pluginName}/${processorName}`);
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configs.unshift({
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files: [`**/*${processorName}`],
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processor: pluginProcessors.get(`${pluginName}/${processorName}`)
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});
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}
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}
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}
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}
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}
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// translate env - must come after plugins
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if (eslintrcConfig.env && typeof eslintrcConfig.env === "object") {
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for (const envName of Object.keys(eslintrcConfig.env)) {
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// only add environments that are true
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if (eslintrcConfig.env[envName]) {
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debug(`Translating environment: ${envName}`);
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if (environments.has(envName)) {
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// built-in environments should be defined first
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configs.unshift(...translateESLintRC(environments.get(envName), {
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resolveConfigRelativeTo,
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resolvePluginsRelativeTo
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}));
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} else if (pluginEnvironments.has(envName)) {
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// if the environment comes from a plugin, it should come after the plugin config
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configs.push(...translateESLintRC(pluginEnvironments.get(envName), {
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resolveConfigRelativeTo,
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resolvePluginsRelativeTo
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}));
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}
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}
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}
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}
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// only add if there are actually keys in the config
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if (Object.keys(flatConfig).length > 0) {
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configs.push(flatConfig);
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}
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return configs;
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}
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//-----------------------------------------------------------------------------
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// Exports
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//-----------------------------------------------------------------------------
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/**
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* A compatibility class for working with configs.
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*/
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class FlatCompat {
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constructor({
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baseDirectory = process.cwd(),
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resolvePluginsRelativeTo = baseDirectory
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} = {}) {
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this.baseDirectory = baseDirectory;
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this.resolvePluginsRelativeTo = resolvePluginsRelativeTo;
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this[cafactory] = new ConfigArrayFactory({
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cwd: baseDirectory,
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resolvePluginsRelativeTo,
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eslintAllPath: path.resolve(__dirname, "../conf/eslint-all.js"),
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eslintRecommendedPath: path.resolve(__dirname, "../conf/eslint-recommended.js")
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});
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}
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/**
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* Translates an ESLintRC-style config into a flag-config-style config.
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* @param {Object} eslintrcConfig The ESLintRC-style config object.
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* @returns {Object} A flag-config-style config object.
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*/
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config(eslintrcConfig) {
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const eslintrcArray = this[cafactory].create(eslintrcConfig, {
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basePath: this.baseDirectory
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});
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const flatArray = [];
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let hasIgnorePatterns = false;
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eslintrcArray.forEach(configData => {
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if (configData.type === "config") {
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hasIgnorePatterns = hasIgnorePatterns || configData.ignorePattern;
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flatArray.push(...translateESLintRC(configData, {
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resolveConfigRelativeTo: path.join(this.baseDirectory, "__placeholder.js"),
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resolvePluginsRelativeTo: path.join(this.resolvePluginsRelativeTo, "__placeholder.js"),
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pluginEnvironments: eslintrcArray.pluginEnvironments,
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pluginProcessors: eslintrcArray.pluginProcessors
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}));
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}
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});
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// combine ignorePatterns to emulate ESLintRC behavior better
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if (hasIgnorePatterns) {
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flatArray.unshift({
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ignores: [filePath => {
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// Compute the final config for this file.
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// This filters config array elements by `files`/`excludedFiles` then merges the elements.
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const finalConfig = eslintrcArray.extractConfig(filePath);
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// Test the `ignorePattern` properties of the final config.
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return Boolean(finalConfig.ignores) && finalConfig.ignores(filePath);
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}]
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});
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}
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return flatArray;
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}
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/**
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* Translates the `env` section of an ESLintRC-style config.
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* @param {Object} envConfig The `env` section of an ESLintRC config.
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* @returns {Object} A flag-config object representing the environments.
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*/
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env(envConfig) {
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return this.config({
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env: envConfig
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});
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}
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/**
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* Translates the `extends` section of an ESLintRC-style config.
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* @param {...string} configsToExtend The names of the configs to load.
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* @returns {Object} A flag-config object representing the config.
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*/
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extends(...configsToExtend) {
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return this.config({
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extends: configsToExtend
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});
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}
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/**
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* Translates the `plugins` section of an ESLintRC-style config.
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* @param {...string} plugins The names of the plugins to load.
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* @returns {Object} A flag-config object representing the plugins.
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*/
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plugins(...plugins) {
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return this.config({
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plugins
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});
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}
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}
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exports.FlatCompat = FlatCompat;
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