382 lines
15 KiB
JavaScript
382 lines
15 KiB
JavaScript
/**
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* @fileoverview Config file operations. This file must be usable in the browser,
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* so no Node-specific code can be here.
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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 minimatch = require("minimatch"),
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path = require("path");
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const debug = require("debug")("eslint:config-ops");
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//------------------------------------------------------------------------------
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// Private
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//------------------------------------------------------------------------------
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const RULE_SEVERITY_STRINGS = ["off", "warn", "error"],
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RULE_SEVERITY = RULE_SEVERITY_STRINGS.reduce((map, value, index) => {
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map[value] = index;
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return map;
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}, {}),
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VALID_SEVERITIES = [0, 1, 2, "off", "warn", "error"];
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//------------------------------------------------------------------------------
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// Public Interface
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//------------------------------------------------------------------------------
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module.exports = {
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/**
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* Creates an empty configuration object suitable for merging as a base.
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* @returns {Object} A configuration object.
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*/
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createEmptyConfig() {
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return {
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globals: {},
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env: {},
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rules: {},
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parserOptions: {}
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};
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},
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/**
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* Creates an environment config based on the specified environments.
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* @param {Object<string,boolean>} env The environment settings.
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* @param {Environments} envContext The environment context.
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* @returns {Object} A configuration object with the appropriate rules and globals
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* set.
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*/
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createEnvironmentConfig(env, envContext) {
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const envConfig = this.createEmptyConfig();
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if (env) {
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envConfig.env = env;
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Object.keys(env).filter(name => env[name]).forEach(name => {
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const environment = envContext.get(name);
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if (environment) {
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debug(`Creating config for environment ${name}`);
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if (environment.globals) {
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Object.assign(envConfig.globals, environment.globals);
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}
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if (environment.parserOptions) {
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Object.assign(envConfig.parserOptions, environment.parserOptions);
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}
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}
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});
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}
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return envConfig;
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},
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/**
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* Given a config with environment settings, applies the globals and
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* ecmaFeatures to the configuration and returns the result.
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* @param {Object} config The configuration information.
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* @param {Environments} envContent env context.
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* @returns {Object} The updated configuration information.
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*/
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applyEnvironments(config, envContent) {
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if (config.env && typeof config.env === "object") {
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debug("Apply environment settings to config");
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return this.merge(this.createEnvironmentConfig(config.env, envContent), config);
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}
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return config;
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},
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/**
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* Merges two config objects. This will not only add missing keys, but will also modify values to match.
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* @param {Object} target config object
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* @param {Object} src config object. Overrides in this config object will take priority over base.
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* @param {boolean} [combine] Whether to combine arrays or not
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* @param {boolean} [isRule] Whether its a rule
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* @returns {Object} merged config object.
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*/
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merge: function deepmerge(target, src, combine, isRule) {
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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2012 Nicholas Fisher
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* This code is taken from deepmerge repo
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* (https://github.com/KyleAMathews/deepmerge)
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* and modified to meet our needs.
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*/
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const array = Array.isArray(src) || Array.isArray(target);
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let dst = array && [] || {};
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if (array) {
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const resolvedTarget = target || [];
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// src could be a string, so check for array
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if (isRule && Array.isArray(src) && src.length > 1) {
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dst = dst.concat(src);
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} else {
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dst = dst.concat(resolvedTarget);
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}
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const resolvedSrc = typeof src === "object" ? src : [src];
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Object.keys(resolvedSrc).forEach((_, i) => {
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const e = resolvedSrc[i];
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if (typeof dst[i] === "undefined") {
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dst[i] = e;
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} else if (typeof e === "object") {
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if (isRule) {
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dst[i] = e;
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} else {
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dst[i] = deepmerge(resolvedTarget[i], e, combine, isRule);
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}
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} else {
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if (!combine) {
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dst[i] = e;
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} else {
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if (dst.indexOf(e) === -1) {
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dst.push(e);
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}
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}
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}
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});
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} else {
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if (target && typeof target === "object") {
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Object.keys(target).forEach(key => {
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dst[key] = target[key];
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});
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}
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Object.keys(src).forEach(key => {
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if (key === "overrides") {
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dst[key] = (target[key] || []).concat(src[key] || []);
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} else if (Array.isArray(src[key]) || Array.isArray(target[key])) {
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dst[key] = deepmerge(target[key], src[key], key === "plugins" || key === "extends", isRule);
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} else if (typeof src[key] !== "object" || !src[key] || key === "exported" || key === "astGlobals") {
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dst[key] = src[key];
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} else {
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dst[key] = deepmerge(target[key] || {}, src[key], combine, key === "rules");
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}
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});
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}
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return dst;
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},
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/**
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* Normalizes the severity value of a rule's configuration to a number
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* @param {(number|string|[number, ...*]|[string, ...*])} ruleConfig A rule's configuration value, generally
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* received from the user. A valid config value is either 0, 1, 2, the string "off" (treated the same as 0),
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* the string "warn" (treated the same as 1), the string "error" (treated the same as 2), or an array
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* whose first element is one of the above values. Strings are matched case-insensitively.
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* @returns {(0|1|2)} The numeric severity value if the config value was valid, otherwise 0.
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*/
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getRuleSeverity(ruleConfig) {
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const severityValue = Array.isArray(ruleConfig) ? ruleConfig[0] : ruleConfig;
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if (severityValue === 0 || severityValue === 1 || severityValue === 2) {
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return severityValue;
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}
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if (typeof severityValue === "string") {
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return RULE_SEVERITY[severityValue.toLowerCase()] || 0;
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}
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return 0;
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},
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/**
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* Converts old-style severity settings (0, 1, 2) into new-style
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* severity settings (off, warn, error) for all rules. Assumption is that severity
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* values have already been validated as correct.
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* @param {Object} config The config object to normalize.
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* @returns {void}
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*/
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normalizeToStrings(config) {
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if (config.rules) {
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Object.keys(config.rules).forEach(ruleId => {
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const ruleConfig = config.rules[ruleId];
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if (typeof ruleConfig === "number") {
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config.rules[ruleId] = RULE_SEVERITY_STRINGS[ruleConfig] || RULE_SEVERITY_STRINGS[0];
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} else if (Array.isArray(ruleConfig) && typeof ruleConfig[0] === "number") {
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ruleConfig[0] = RULE_SEVERITY_STRINGS[ruleConfig[0]] || RULE_SEVERITY_STRINGS[0];
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}
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});
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}
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},
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/**
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* Determines if the severity for the given rule configuration represents an error.
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* @param {int|string|Array} ruleConfig The configuration for an individual rule.
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* @returns {boolean} True if the rule represents an error, false if not.
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*/
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isErrorSeverity(ruleConfig) {
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let severity = Array.isArray(ruleConfig) ? ruleConfig[0] : ruleConfig;
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if (typeof severity === "string") {
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severity = RULE_SEVERITY[severity.toLowerCase()] || 0;
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}
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return (typeof severity === "number" && severity === 2);
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},
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/**
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* Checks whether a given config has valid severity or not.
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* @param {number|string|Array} ruleConfig - The configuration for an individual rule.
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* @returns {boolean} `true` if the configuration has valid severity.
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*/
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isValidSeverity(ruleConfig) {
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let severity = Array.isArray(ruleConfig) ? ruleConfig[0] : ruleConfig;
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if (typeof severity === "string") {
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severity = severity.toLowerCase();
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}
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return VALID_SEVERITIES.indexOf(severity) !== -1;
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},
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/**
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* Checks whether every rule of a given config has valid severity or not.
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* @param {Object} config - The configuration for rules.
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* @returns {boolean} `true` if the configuration has valid severity.
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*/
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isEverySeverityValid(config) {
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return Object.keys(config).every(ruleId => this.isValidSeverity(config[ruleId]));
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},
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/**
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* Merges all configurations in a given config vector. A vector is an array of objects, each containing a config
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* file path and a list of subconfig indices that match the current file path. All config data is assumed to be
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* cached.
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* @param {Array<Object>} vector list of config files and their subconfig indices that match the current file path
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* @param {Object} configCache the config cache
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* @returns {Object} config object
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*/
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getConfigFromVector(vector, configCache) {
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const cachedConfig = configCache.getMergedVectorConfig(vector);
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if (cachedConfig) {
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return cachedConfig;
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}
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debug("Using config from partial cache");
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const subvector = Array.from(vector);
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let nearestCacheIndex = subvector.length - 1,
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partialCachedConfig;
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while (nearestCacheIndex >= 0) {
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partialCachedConfig = configCache.getMergedVectorConfig(subvector);
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if (partialCachedConfig) {
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break;
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}
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subvector.pop();
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nearestCacheIndex--;
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}
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if (!partialCachedConfig) {
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partialCachedConfig = {};
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}
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let finalConfig = partialCachedConfig;
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// Start from entry immediately following nearest cached config (first uncached entry)
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for (let i = nearestCacheIndex + 1; i < vector.length; i++) {
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finalConfig = this.mergeVectorEntry(finalConfig, vector[i], configCache);
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configCache.setMergedVectorConfig(vector.slice(0, i + 1), finalConfig);
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}
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return finalConfig;
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},
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/**
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* Merges the config options from a single vector entry into the supplied config.
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* @param {Object} config the base config to merge the vector entry's options into
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* @param {Object} vectorEntry a single entry from a vector, consisting of a config file path and an array of
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* matching override indices
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* @param {Object} configCache the config cache
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* @returns {Object} merged config object
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*/
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mergeVectorEntry(config, vectorEntry, configCache) {
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const vectorEntryConfig = Object.assign({}, configCache.getConfig(vectorEntry.filePath));
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let mergedConfig = Object.assign({}, config),
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overrides;
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if (vectorEntryConfig.overrides) {
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overrides = vectorEntryConfig.overrides.filter(
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(override, overrideIndex) => vectorEntry.matchingOverrides.indexOf(overrideIndex) !== -1
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);
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} else {
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overrides = [];
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}
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mergedConfig = this.merge(mergedConfig, vectorEntryConfig);
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delete mergedConfig.overrides;
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mergedConfig = overrides.reduce((lastConfig, override) => this.merge(lastConfig, override), mergedConfig);
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if (mergedConfig.filePath) {
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delete mergedConfig.filePath;
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delete mergedConfig.baseDirectory;
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} else if (mergedConfig.files) {
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delete mergedConfig.files;
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}
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return mergedConfig;
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},
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/**
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* Checks that the specified file path matches all of the supplied glob patterns.
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* @param {string} filePath The file path to test patterns against
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* @param {string|string[]} patterns One or more glob patterns, of which at least one should match the file path
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* @param {string|string[]} [excludedPatterns] One or more glob patterns, of which none should match the file path
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* @returns {boolean} True if all the supplied patterns match the file path, false otherwise
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*/
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pathMatchesGlobs(filePath, patterns, excludedPatterns) {
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const patternList = [].concat(patterns);
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const excludedPatternList = [].concat(excludedPatterns || []);
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patternList.concat(excludedPatternList).forEach(pattern => {
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if (path.isAbsolute(pattern) || pattern.includes("..")) {
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throw new Error(`Invalid override pattern (expected relative path not containing '..'): ${pattern}`);
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}
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});
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const opts = { matchBase: true };
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return patternList.some(pattern => minimatch(filePath, pattern, opts)) &&
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!excludedPatternList.some(excludedPattern => minimatch(filePath, excludedPattern, opts));
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}
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};
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