'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var debugOrig = require('debug');
var fs = require('fs');
var importFresh = require('import-fresh');
var Module = require('module');
var path = require('path');
var stripComments = require('strip-json-comments');
var assert = require('assert');
var ignore = require('ignore');
var util = require('util');
var minimatch = require('minimatch');
var Ajv = require('ajv');
var globals = require('globals');
var os = require('os');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var debugOrig__default = /*#__PURE__*/_interopDefaultLegacy(debugOrig);
var fs__default = /*#__PURE__*/_interopDefaultLegacy(fs);
var importFresh__default = /*#__PURE__*/_interopDefaultLegacy(importFresh);
var Module__default = /*#__PURE__*/_interopDefaultLegacy(Module);
var path__default = /*#__PURE__*/_interopDefaultLegacy(path);
var stripComments__default = /*#__PURE__*/_interopDefaultLegacy(stripComments);
var assert__default = /*#__PURE__*/_interopDefaultLegacy(assert);
var ignore__default = /*#__PURE__*/_interopDefaultLegacy(ignore);
var util__default = /*#__PURE__*/_interopDefaultLegacy(util);
var minimatch__default = /*#__PURE__*/_interopDefaultLegacy(minimatch);
var Ajv__default = /*#__PURE__*/_interopDefaultLegacy(Ajv);
var globals__default = /*#__PURE__*/_interopDefaultLegacy(globals);
var os__default = /*#__PURE__*/_interopDefaultLegacy(os);

/**
 * @fileoverview `IgnorePattern` class.
 *
 * `IgnorePattern` class has the set of glob patterns and the base path.
 *
 * It provides two static methods.
 *
 * - `IgnorePattern.createDefaultIgnore(cwd)`
 *      Create the default predicate function.
 * - `IgnorePattern.createIgnore(ignorePatterns)`
 *      Create the predicate function from multiple `IgnorePattern` objects.
 *
 * It provides two properties and a method.
 *
 * - `patterns`
 *      The glob patterns that ignore to lint.
 * - `basePath`
 *      The base path of the glob patterns. If absolute paths existed in the
 *      glob patterns, those are handled as relative paths to the base path.
 * - `getPatternsRelativeTo(basePath)`
 *      Get `patterns` as modified for a given base path. It modifies the
 *      absolute paths in the patterns as prepending the difference of two base
 *      paths.
 *
 * `ConfigArrayFactory` creates `IgnorePattern` objects when it processes
 * `ignorePatterns` properties.
 *
 * @author Toru Nagashima <https://github.com/mysticatea>
 */

const debug$3 = debugOrig__default["default"]("eslintrc:ignore-pattern");

/** @typedef {ReturnType<import("ignore").default>} Ignore */

//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------

/**
 * Get the path to the common ancestor directory of given paths.
 * @param {string[]} sourcePaths The paths to calculate the common ancestor.
 * @returns {string} The path to the common ancestor directory.
 */
function getCommonAncestorPath(sourcePaths) {
    let result = sourcePaths[0];

    for (let i = 1; i < sourcePaths.length; ++i) {
        const a = result;
        const b = sourcePaths[i];

        // Set the shorter one (it's the common ancestor if one includes the other).
        result = a.length < b.length ? a : b;

        // Set the common ancestor.
        for (let j = 0, lastSepPos = 0; j < a.length && j < b.length; ++j) {
            if (a[j] !== b[j]) {
                result = a.slice(0, lastSepPos);
                break;
            }
            if (a[j] === path__default["default"].sep) {
                lastSepPos = j;
            }
        }
    }

    let resolvedResult = result || path__default["default"].sep;

    // if Windows common ancestor is root of drive must have trailing slash to be absolute.
    if (resolvedResult && resolvedResult.endsWith(":") && process.platform === "win32") {
        resolvedResult += path__default["default"].sep;
    }
    return resolvedResult;
}

/**
 * Make relative path.
 * @param {string} from The source path to get relative path.
 * @param {string} to The destination path to get relative path.
 * @returns {string} The relative path.
 */
function relative(from, to) {
    const relPath = path__default["default"].relative(from, to);

    if (path__default["default"].sep === "/") {
        return relPath;
    }
    return relPath.split(path__default["default"].sep).join("/");
}

/**
 * Get the trailing slash if existed.
 * @param {string} filePath The path to check.
 * @returns {string} The trailing slash if existed.
 */
function dirSuffix(filePath) {
    const isDir = (
        filePath.endsWith(path__default["default"].sep) ||
        (process.platform === "win32" && filePath.endsWith("/"))
    );

    return isDir ? "/" : "";
}

const DefaultPatterns = Object.freeze(["/**/node_modules/*"]);
const DotPatterns = Object.freeze([".*", "!.eslintrc.*", "!../"]);

//------------------------------------------------------------------------------
// Public
//------------------------------------------------------------------------------

class IgnorePattern {

    /**
     * The default patterns.
     * @type {string[]}
     */
    static get DefaultPatterns() {
        return DefaultPatterns;
    }

    /**
     * Create the default predicate function.
     * @param {string} cwd The current working directory.
     * @returns {((filePath:string, dot:boolean) => boolean) & {basePath:string; patterns:string[]}}
     * The preficate function.
     * The first argument is an absolute path that is checked.
     * The second argument is the flag to not ignore dotfiles.
     * If the predicate function returned `true`, it means the path should be ignored.
     */
    static createDefaultIgnore(cwd) {
        return this.createIgnore([new IgnorePattern(DefaultPatterns, cwd)]);
    }

    /**
     * Create the predicate function from multiple `IgnorePattern` objects.
     * @param {IgnorePattern[]} ignorePatterns The list of ignore patterns.
     * @returns {((filePath:string, dot?:boolean) => boolean) & {basePath:string; patterns:string[]}}
     * The preficate function.
     * The first argument is an absolute path that is checked.
     * The second argument is the flag to not ignore dotfiles.
     * If the predicate function returned `true`, it means the path should be ignored.
     */
    static createIgnore(ignorePatterns) {
        debug$3("Create with: %o", ignorePatterns);

        const basePath = getCommonAncestorPath(ignorePatterns.map(p => p.basePath));
        const patterns = [].concat(
            ...ignorePatterns.map(p => p.getPatternsRelativeTo(basePath))
        );
        const ig = ignore__default["default"]({ allowRelativePaths: true }).add([...DotPatterns, ...patterns]);
        const dotIg = ignore__default["default"]({ allowRelativePaths: true }).add(patterns);

        debug$3("  processed: %o", { basePath, patterns });

        return Object.assign(
            (filePath, dot = false) => {
                assert__default["default"](path__default["default"].isAbsolute(filePath), "'filePath' should be an absolute path.");
                const relPathRaw = relative(basePath, filePath);
                const relPath = relPathRaw && (relPathRaw + dirSuffix(filePath));
                const adoptedIg = dot ? dotIg : ig;
                const result = relPath !== "" && adoptedIg.ignores(relPath);

                debug$3("Check", { filePath, dot, relativePath: relPath, result });
                return result;
            },
            { basePath, patterns }
        );
    }

    /**
     * Initialize a new `IgnorePattern` instance.
     * @param {string[]} patterns The glob patterns that ignore to lint.
     * @param {string} basePath The base path of `patterns`.
     */
    constructor(patterns, basePath) {
        assert__default["default"](path__default["default"].isAbsolute(basePath), "'basePath' should be an absolute path.");

        /**
         * The glob patterns that ignore to lint.
         * @type {string[]}
         */
        this.patterns = patterns;

        /**
         * The base path of `patterns`.
         * @type {string}
         */
        this.basePath = basePath;

        /**
         * If `true` then patterns which don't start with `/` will match the paths to the outside of `basePath`. Defaults to `false`.
         *
         * It's set `true` for `.eslintignore`, `package.json`, and `--ignore-path` for backward compatibility.
         * It's `false` as-is for `ignorePatterns` property in config files.
         * @type {boolean}
         */
        this.loose = false;
    }

    /**
     * Get `patterns` as modified for a given base path. It modifies the
     * absolute paths in the patterns as prepending the difference of two base
     * paths.
     * @param {string} newBasePath The base path.
     * @returns {string[]} Modifired patterns.
     */
    getPatternsRelativeTo(newBasePath) {
        assert__default["default"](path__default["default"].isAbsolute(newBasePath), "'newBasePath' should be an absolute path.");
        const { basePath, loose, patterns } = this;

        if (newBasePath === basePath) {
            return patterns;
        }
        const prefix = `/${relative(newBasePath, basePath)}`;

        return patterns.map(pattern => {
            const negative = pattern.startsWith("!");
            const head = negative ? "!" : "";
            const body = negative ? pattern.slice(1) : pattern;

            if (body.startsWith("/") || body.startsWith("../")) {
                return `${head}${prefix}${body}`;
            }
            return loose ? pattern : `${head}${prefix}/**/${body}`;
        });
    }
}

/**
 * @fileoverview `ExtractedConfig` class.
 *
 * `ExtractedConfig` class expresses a final configuration for a specific file.
 *
 * It provides one method.
 *
 * - `toCompatibleObjectAsConfigFileContent()`
 *      Convert this configuration to the compatible object as the content of
 *      config files. It converts the loaded parser and plugins to strings.
 *      `CLIEngine#getConfigForFile(filePath)` method uses this method.
 *
 * `ConfigArray#extractConfig(filePath)` creates a `ExtractedConfig` instance.
 *
 * @author Toru Nagashima <https://github.com/mysticatea>
 */

// For VSCode intellisense
/** @typedef {import("../../shared/types").ConfigData} ConfigData */
/** @typedef {import("../../shared/types").GlobalConf} GlobalConf */
/** @typedef {import("../../shared/types").SeverityConf} SeverityConf */
/** @typedef {import("./config-dependency").DependentParser} DependentParser */
/** @typedef {import("./config-dependency").DependentPlugin} DependentPlugin */

/**
 * Check if `xs` starts with `ys`.
 * @template T
 * @param {T[]} xs The array to check.
 * @param {T[]} ys The array that may be the first part of `xs`.
 * @returns {boolean} `true` if `xs` starts with `ys`.
 */
function startsWith(xs, ys) {
    return xs.length >= ys.length && ys.every((y, i) => y === xs[i]);
}

/**
 * The class for extracted config data.
 */
class ExtractedConfig {
    constructor() {

        /**
         * The config name what `noInlineConfig` setting came from.
         * @type {string}
         */
        this.configNameOfNoInlineConfig = "";

        /**
         * Environments.
         * @type {Record<string, boolean>}
         */
        this.env = {};

        /**
         * Global variables.
         * @type {Record<string, GlobalConf>}
         */
        this.globals = {};

        /**
         * The glob patterns that ignore to lint.
         * @type {(((filePath:string, dot?:boolean) => boolean) & { basePath:string; patterns:string[] }) | undefined}
         */
        this.ignores = void 0;

        /**
         * The flag that disables directive comments.
         * @type {boolean|undefined}
         */
        this.noInlineConfig = void 0;

        /**
         * Parser definition.
         * @type {DependentParser|null}
         */
        this.parser = null;

        /**
         * Options for the parser.
         * @type {Object}
         */
        this.parserOptions = {};

        /**
         * Plugin definitions.
         * @type {Record<string, DependentPlugin>}
         */
        this.plugins = {};

        /**
         * Processor ID.
         * @type {string|null}
         */
        this.processor = null;

        /**
         * The flag that reports unused `eslint-disable` directive comments.
         * @type {boolean|undefined}
         */
        this.reportUnusedDisableDirectives = void 0;

        /**
         * Rule settings.
         * @type {Record<string, [SeverityConf, ...any[]]>}
         */
        this.rules = {};

        /**
         * Shared settings.
         * @type {Object}
         */
        this.settings = {};
    }

    /**
     * Convert this config to the compatible object as a config file content.
     * @returns {ConfigData} The converted object.
     */
    toCompatibleObjectAsConfigFileContent() {
        const {
            /* eslint-disable no-unused-vars */
            configNameOfNoInlineConfig: _ignore1,
            processor: _ignore2,
            /* eslint-enable no-unused-vars */
            ignores,
            ...config
        } = this;

        config.parser = config.parser && config.parser.filePath;
        config.plugins = Object.keys(config.plugins).filter(Boolean).reverse();
        config.ignorePatterns = ignores ? ignores.patterns : [];

        // Strip the default patterns from `ignorePatterns`.
        if (startsWith(config.ignorePatterns, IgnorePattern.DefaultPatterns)) {
            config.ignorePatterns =
                config.ignorePatterns.slice(IgnorePattern.DefaultPatterns.length);
        }

        return config;
    }
}

/**
 * @fileoverview `ConfigArray` class.
 *
 * `ConfigArray` class expresses the full of a configuration. It has the entry
 * config file, base config files that were extended, loaded parsers, and loaded
 * plugins.
 *
 * `ConfigArray` class provides three properties and two methods.
 *
 * - `pluginEnvironments`
 * - `pluginProcessors`
 * - `pluginRules`
 *      The `Map` objects that contain the members of all plugins that this
 *      config array contains. Those map objects don't have mutation methods.
 *      Those keys are the member ID such as `pluginId/memberName`.
 * - `isRoot()`
 *      If `true` then this configuration has `root:true` property.
 * - `extractConfig(filePath)`
 *      Extract the final configuration for a given file. This means merging
 *      every config array element which that `criteria` property matched. The
 *      `filePath` argument must be an absolute path.
 *
 * `ConfigArrayFactory` provides the loading logic of config files.
 *
 * @author Toru Nagashima <https://github.com/mysticatea>
 */

//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------

// Define types for VSCode IntelliSense.
/** @typedef {import("../../shared/types").Environment} Environment */
/** @typedef {import("../../shared/types").GlobalConf} GlobalConf */
/** @typedef {import("../../shared/types").RuleConf} RuleConf */
/** @typedef {import("../../shared/types").Rule} Rule */
/** @typedef {import("../../shared/types").Plugin} Plugin */
/** @typedef {import("../../shared/types").Processor} Processor */
/** @typedef {import("./config-dependency").DependentParser} DependentParser */
/** @typedef {import("./config-dependency").DependentPlugin} DependentPlugin */
/** @typedef {import("./override-tester")["OverrideTester"]} OverrideTester */

/**
 * @typedef {Object} ConfigArrayElement
 * @property {string} name The name of this config element.
 * @property {string} filePath The path to the source file of this config element.
 * @property {InstanceType<OverrideTester>|null} criteria The tester for the `files` and `excludedFiles` of this config element.
 * @property {Record<string, boolean>|undefined} env The environment settings.
 * @property {Record<string, GlobalConf>|undefined} globals The global variable settings.
 * @property {IgnorePattern|undefined} ignorePattern The ignore patterns.
 * @property {boolean|undefined} noInlineConfig The flag that disables directive comments.
 * @property {DependentParser|undefined} parser The parser loader.
 * @property {Object|undefined} parserOptions The parser options.
 * @property {Record<string, DependentPlugin>|undefined} plugins The plugin loaders.
 * @property {string|undefined} processor The processor name to refer plugin's processor.
 * @property {boolean|undefined} reportUnusedDisableDirectives The flag to report unused `eslint-disable` comments.
 * @property {boolean|undefined} root The flag to express root.
 * @property {Record<string, RuleConf>|undefined} rules The rule settings
 * @property {Object|undefined} settings The shared settings.
 * @property {"config" | "ignore" | "implicit-processor"} type The element type.
 */

/**
 * @typedef {Object} ConfigArrayInternalSlots
 * @property {Map<string, ExtractedConfig>} cache The cache to extract configs.
 * @property {ReadonlyMap<string, Environment>|null} envMap The map from environment ID to environment definition.
 * @property {ReadonlyMap<string, Processor>|null} processorMap The map from processor ID to environment definition.
 * @property {ReadonlyMap<string, Rule>|null} ruleMap The map from rule ID to rule definition.
 */

/** @type {WeakMap<ConfigArray, ConfigArrayInternalSlots>} */
const internalSlotsMap$2 = new class extends WeakMap {
    get(key) {
        let value = super.get(key);

        if (!value) {
            value = {
                cache: new Map(),
                envMap: null,
                processorMap: null,
                ruleMap: null
            };
            super.set(key, value);
        }

        return value;
    }
}();

/**
 * Get the indices which are matched to a given file.
 * @param {ConfigArrayElement[]} elements The elements.
 * @param {string} filePath The path to a target file.
 * @returns {number[]} The indices.
 */
function getMatchedIndices(elements, filePath) {
    const indices = [];

    for (let i = elements.length - 1; i >= 0; --i) {
        const element = elements[i];

        if (!element.criteria || (filePath && element.criteria.test(filePath))) {
            indices.push(i);
        }
    }

    return indices;
}

/**
 * Check if a value is a non-null object.
 * @param {any} x The value to check.
 * @returns {boolean} `true` if the value is a non-null object.
 */
function isNonNullObject(x) {
    return typeof x === "object" && x !== null;
}

/**
 * Merge two objects.
 *
 * Assign every property values of `y` to `x` if `x` doesn't have the property.
 * If `x`'s property value is an object, it does recursive.
 * @param {Object} target The destination to merge
 * @param {Object|undefined} source The source to merge.
 * @returns {void}
 */
function mergeWithoutOverwrite(target, source) {
    if (!isNonNullObject(source)) {
        return;
    }

    for (const key of Object.keys(source)) {
        if (key === "__proto__") {
            continue;
        }

        if (isNonNullObject(target[key])) {
            mergeWithoutOverwrite(target[key], source[key]);
        } else if (target[key] === void 0) {
            if (isNonNullObject(source[key])) {
                target[key] = Array.isArray(source[key]) ? [] : {};
                mergeWithoutOverwrite(target[key], source[key]);
            } else if (source[key] !== void 0) {
                target[key] = source[key];
            }
        }
    }
}

/**
 * The error for plugin conflicts.
 */
class PluginConflictError extends Error {

    /**
     * Initialize this error object.
     * @param {string} pluginId The plugin ID.
     * @param {{filePath:string, importerName:string}[]} plugins The resolved plugins.
     */
    constructor(pluginId, plugins) {
        super(`Plugin "${pluginId}" was conflicted between ${plugins.map(p => `"${p.importerName}"`).join(" and ")}.`);
        this.messageTemplate = "plugin-conflict";
        this.messageData = { pluginId, plugins };
    }
}

/**
 * Merge plugins.
 * `target`'s definition is prior to `source`'s.
 * @param {Record<string, DependentPlugin>} target The destination to merge
 * @param {Record<string, DependentPlugin>|undefined} source The source to merge.
 * @returns {void}
 */
function mergePlugins(target, source) {
    if (!isNonNullObject(source)) {
        return;
    }

    for (const key of Object.keys(source)) {
        if (key === "__proto__") {
            continue;
        }
        const targetValue = target[key];
        const sourceValue = source[key];

        // Adopt the plugin which was found at first.
        if (targetValue === void 0) {
            if (sourceValue.error) {
                throw sourceValue.error;
            }
            target[key] = sourceValue;
        } else if (sourceValue.filePath !== targetValue.filePath) {
            throw new PluginConflictError(key, [
                {
                    filePath: targetValue.filePath,
                    importerName: targetValue.importerName
                },
                {
                    filePath: sourceValue.filePath,
                    importerName: sourceValue.importerName
                }
            ]);
        }
    }
}

/**
 * Merge rule configs.
 * `target`'s definition is prior to `source`'s.
 * @param {Record<string, Array>} target The destination to merge
 * @param {Record<string, RuleConf>|undefined} source The source to merge.
 * @returns {void}
 */
function mergeRuleConfigs(target, source) {
    if (!isNonNullObject(source)) {
        return;
    }

    for (const key of Object.keys(source)) {
        if (key === "__proto__") {
            continue;
        }
        const targetDef = target[key];
        const sourceDef = source[key];

        // Adopt the rule config which was found at first.
        if (targetDef === void 0) {
            if (Array.isArray(sourceDef)) {
                target[key] = [...sourceDef];
            } else {
                target[key] = [sourceDef];
            }

        /*
         * If the first found rule config is severity only and the current rule
         * config has options, merge the severity and the options.
         */
        } else if (
            targetDef.length === 1 &&
            Array.isArray(sourceDef) &&
            sourceDef.length >= 2
        ) {
            targetDef.push(...sourceDef.slice(1));
        }
    }
}

/**
 * Create the extracted config.
 * @param {ConfigArray} instance The config elements.
 * @param {number[]} indices The indices to use.
 * @returns {ExtractedConfig} The extracted config.
 */
function createConfig(instance, indices) {
    const config = new ExtractedConfig();
    const ignorePatterns = [];

    // Merge elements.
    for (const index of indices) {
        const element = instance[index];

        // Adopt the parser which was found at first.
        if (!config.parser && element.parser) {
            if (element.parser.error) {
                throw element.parser.error;
            }
            config.parser = element.parser;
        }

        // Adopt the processor which was found at first.
        if (!config.processor && element.processor) {
            config.processor = element.processor;
        }

        // Adopt the noInlineConfig which was found at first.
        if (config.noInlineConfig === void 0 && element.noInlineConfig !== void 0) {
            config.noInlineConfig = element.noInlineConfig;
            config.configNameOfNoInlineConfig = element.name;
        }

        // Adopt the reportUnusedDisableDirectives which was found at first.
        if (config.reportUnusedDisableDirectives === void 0 && element.reportUnusedDisableDirectives !== void 0) {
            config.reportUnusedDisableDirectives = element.reportUnusedDisableDirectives;
        }

        // Collect ignorePatterns
        if (element.ignorePattern) {
            ignorePatterns.push(element.ignorePattern);
        }

        // Merge others.
        mergeWithoutOverwrite(config.env, element.env);
        mergeWithoutOverwrite(config.globals, element.globals);
        mergeWithoutOverwrite(config.parserOptions, element.parserOptions);
        mergeWithoutOverwrite(config.settings, element.settings);
        mergePlugins(config.plugins, element.plugins);
        mergeRuleConfigs(config.rules, element.rules);
    }

    // Create the predicate function for ignore patterns.
    if (ignorePatterns.length > 0) {
        config.ignores = IgnorePattern.createIgnore(ignorePatterns.reverse());
    }

    return config;
}

/**
 * Collect definitions.
 * @template T, U
 * @param {string} pluginId The plugin ID for prefix.
 * @param {Record<string,T>} defs The definitions to collect.
 * @param {Map<string, U>} map The map to output.
 * @param {function(T): U} [normalize] The normalize function for each value.
 * @returns {void}
 */
function collect(pluginId, defs, map, normalize) {
    if (defs) {
        const prefix = pluginId && `${pluginId}/`;

        for (const [key, value] of Object.entries(defs)) {
            map.set(
                `${prefix}${key}`,
                normalize ? normalize(value) : value
            );
        }
    }
}

/**
 * Normalize a rule definition.
 * @param {Function|Rule} rule The rule definition to normalize.
 * @returns {Rule} The normalized rule definition.
 */
function normalizePluginRule(rule) {
    return typeof rule === "function" ? { create: rule } : rule;
}

/**
 * Delete the mutation methods from a given map.
 * @param {Map<any, any>} map The map object to delete.
 * @returns {void}
 */
function deleteMutationMethods(map) {
    Object.defineProperties(map, {
        clear: { configurable: true, value: void 0 },
        delete: { configurable: true, value: void 0 },
        set: { configurable: true, value: void 0 }
    });
}

/**
 * Create `envMap`, `processorMap`, `ruleMap` with the plugins in the config array.
 * @param {ConfigArrayElement[]} elements The config elements.
 * @param {ConfigArrayInternalSlots} slots The internal slots.
 * @returns {void}
 */
function initPluginMemberMaps(elements, slots) {
    const processed = new Set();

    slots.envMap = new Map();
    slots.processorMap = new Map();
    slots.ruleMap = new Map();

    for (const element of elements) {
        if (!element.plugins) {
            continue;
        }

        for (const [pluginId, value] of Object.entries(element.plugins)) {
            const plugin = value.definition;

            if (!plugin || processed.has(pluginId)) {
                continue;
            }
            processed.add(pluginId);

            collect(pluginId, plugin.environments, slots.envMap);
            collect(pluginId, plugin.processors, slots.processorMap);
            collect(pluginId, plugin.rules, slots.ruleMap, normalizePluginRule);
        }
    }

    dele