Current File : /var/www/html/node_modules/@humanwhocodes/config-array/api.js
'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
var path = _interopDefault(require('path'));
var minimatch = _interopDefault(require('minimatch'));
var createDebug = _interopDefault(require('debug'));
var objectSchema = require('@humanwhocodes/object-schema');
/**
* @fileoverview ConfigSchema
* @author Nicholas C. Zakas
*/
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
/**
* Assets that a given value is an array.
* @param {*} value The value to check.
* @returns {void}
* @throws {TypeError} When the value is not an array.
*/
function assertIsArray(value) {
if (!Array.isArray(value)) {
throw new TypeError('Expected value to be an array.');
}
}
/**
* Assets that a given value is an array containing only strings and functions.
* @param {*} value The value to check.
* @returns {void}
* @throws {TypeError} When the value is not an array of strings and functions.
*/
function assertIsArrayOfStringsAndFunctions(value, name) {
assertIsArray(value);
if (value.some(item => typeof item !== 'string' && typeof item !== 'function')) {
throw new TypeError('Expected array to only contain strings.');
}
}
//------------------------------------------------------------------------------
// Exports
//------------------------------------------------------------------------------
/**
* The base schema that every ConfigArray uses.
* @type Object
*/
const baseSchema = Object.freeze({
name: {
required: false,
merge() {
return undefined;
},
validate(value) {
if (typeof value !== 'string') {
throw new TypeError('Property must be a string.');
}
}
},
files: {
required: false,
merge() {
return undefined;
},
validate(value) {
// first check if it's an array
assertIsArray(value);
// then check each member
value.forEach(item => {
if (Array.isArray(item)) {
assertIsArrayOfStringsAndFunctions(item);
} else if (typeof item !== 'string' && typeof item !== 'function') {
throw new TypeError('Items must be a string, a function, or an array of strings and functions.');
}
});
}
},
ignores: {
required: false,
merge() {
return undefined;
},
validate: assertIsArrayOfStringsAndFunctions
}
});
/**
* @fileoverview ConfigArray
* @author Nicholas C. Zakas
*/
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
const debug = createDebug('@hwc/config-array');
const MINIMATCH_OPTIONS = {
matchBase: true
};
const CONFIG_TYPES = new Set(['array', 'function']);
/**
* Shorthand for checking if a value is a string.
* @param {any} value The value to check.
* @returns {boolean} True if a string, false if not.
*/
function isString(value) {
return typeof value === 'string';
}
/**
* Normalizes a `ConfigArray` by flattening it and executing any functions
* that are found inside.
* @param {Array} items The items in a `ConfigArray`.
* @param {Object} context The context object to pass into any function
* found.
* @param {Array<string>} extraConfigTypes The config types to check.
* @returns {Promise<Array>} A flattened array containing only config objects.
* @throws {TypeError} When a config function returns a function.
*/
async function normalize(items, context, extraConfigTypes) {
const allowFunctions = extraConfigTypes.includes('function');
const allowArrays = extraConfigTypes.includes('array');
async function *flatTraverse(array) {
for (let item of array) {
if (typeof item === 'function') {
if (!allowFunctions) {
throw new TypeError('Unexpected function.');
}
item = item(context);
if (item.then) {
item = await item;
}
}
if (Array.isArray(item)) {
if (!allowArrays) {
throw new TypeError('Unexpected array.');
}
yield * flatTraverse(item);
} else if (typeof item === 'function') {
throw new TypeError('A config function can only return an object or array.');
} else {
yield item;
}
}
}
/*
* Async iterables cannot be used with the spread operator, so we need to manually
* create the array to return.
*/
const asyncIterable = await flatTraverse(items);
const configs = [];
for await (const config of asyncIterable) {
configs.push(config);
}
return configs;
}
/**
* Normalizes a `ConfigArray` by flattening it and executing any functions
* that are found inside.
* @param {Array} items The items in a `ConfigArray`.
* @param {Object} context The context object to pass into any function
* found.
* @param {Array<string>} extraConfigTypes The config types to check.
* @returns {Array} A flattened array containing only config objects.
* @throws {TypeError} When a config function returns a function.
*/
function normalizeSync(items, context, extraConfigTypes) {
const allowFunctions = extraConfigTypes.includes('function');
const allowArrays = extraConfigTypes.includes('array');
function *flatTraverse(array) {
for (let item of array) {
if (typeof item === 'function') {
if (!allowFunctions) {
throw new TypeError('Unexpected function.');
}
item = item(context);
if (item.then) {
throw new TypeError('Async config functions are not supported.');
}
}
if (Array.isArray(item)) {
if (!allowArrays) {
throw new TypeError('Unexpected array.');
}
yield * flatTraverse(item);
} else if (typeof item === 'function') {
throw new TypeError('A config function can only return an object or array.');
} else {
yield item;
}
}
}
return [...flatTraverse(items)];
}
/**
* Determines if a given file path should be ignored based on the given
* matcher.
* @param {Array<string|() => boolean>} ignores The ignore patterns to check.
* @param {string} filePath The absolute path of the file to check.
* @param {string} relativeFilePath The relative path of the file to check.
* @returns {boolean} True if the path should be ignored and false if not.
*/
function shouldIgnoreFilePath(ignores, filePath, relativeFilePath) {
let shouldIgnore = false;
for (const matcher of ignores) {
if (typeof matcher === 'function') {
shouldIgnore = shouldIgnore || matcher(filePath);
continue;
}
/*
* If there's a negated pattern, that means anything matching
* must NOT be ignored. To do that, we need to use the `flipNegate`
* option for minimatch to check if the filepath matches the
* pattern specified after the !, and if that result is true,
* then we return false immediately because this file should
* never be ignored.
*/
if (matcher.startsWith('!')) {
/*
* The file must already be ignored in order to apply a negated
* pattern, because negated patterns simply remove files that
* would already be ignored.
*/
if (shouldIgnore &&
minimatch(relativeFilePath, matcher, {
...MINIMATCH_OPTIONS,
flipNegate: true
})) {
return false;
}
} else {
shouldIgnore = shouldIgnore || minimatch(relativeFilePath, matcher, MINIMATCH_OPTIONS);
}
}
return shouldIgnore;
}
/**
* Determines if a given file path is matched by a config. If the config
* has no `files` field, then it matches; otherwise, if a `files` field
* is present then we match the globs in `files` and exclude any globs in
* `ignores`.
* @param {string} filePath The absolute file path to check.
* @param {Object} config The config object to check.
* @returns {boolean} True if the file path is matched by the config,
* false if not.
*/
function pathMatches(filePath, basePath, config) {
// a config without `files` field always match
if (!config.files) {
return true;
}
/*
* For both files and ignores, functions are passed the absolute
* file path while strings are compared against the relative
* file path.
*/
const relativeFilePath = path.relative(basePath, filePath);
// if files isn't an array, throw an error
if (!Array.isArray(config.files) || config.files.length === 0) {
throw new TypeError('The files key must be a non-empty array.');
}
// match both strings and functions
const match = pattern => {
if (isString(pattern)) {
return minimatch(relativeFilePath, pattern, MINIMATCH_OPTIONS);
}
if (typeof pattern === 'function') {
return pattern(filePath);
}
throw new TypeError(`Unexpected matcher type ${pattern}.`);
};
const isFilePathIgnored = matcher => {
return shouldIgnoreFilePath([matcher], filePath, relativeFilePath);
};
// check for all matches to config.files
let filePathMatchesPattern = config.files.some(pattern => {
if (Array.isArray(pattern)) {
return pattern.every(match);
}
return match(pattern);
});
/*
* If the file path matches the config.files patterns, then check to see
* if there are any files to ignore.
*/
if (filePathMatchesPattern && config.ignores) {
filePathMatchesPattern = !config.ignores.some(isFilePathIgnored);
}
return filePathMatchesPattern;
}
/**
* Ensures that a ConfigArray has been normalized.
* @param {ConfigArray} configArray The ConfigArray to check.
* @returns {void}
* @throws {Error} When the `ConfigArray` is not normalized.
*/
function assertNormalized(configArray) {
// TODO: Throw more verbose error
if (!configArray.isNormalized()) {
throw new Error('ConfigArray must be normalized to perform this operation.');
}
}
/**
* Ensures that config types are valid.
* @param {Array<string>} extraConfigTypes The config types to check.
* @returns {void}
* @throws {Error} When the config types array is invalid.
*/
function assertExtraConfigTypes(extraConfigTypes) {
if (extraConfigTypes.length > 2) {
throw new TypeError('configTypes must be an array with at most two items.');
}
for (const configType of extraConfigTypes) {
if (!CONFIG_TYPES.has(configType)) {
throw new TypeError(`Unexpected config type "${configType}" found. Expected one of: "object", "array", "function".`);
}
}
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
const ConfigArraySymbol = {
isNormalized: Symbol('isNormalized'),
configCache: Symbol('configCache'),
schema: Symbol('schema'),
finalizeConfig: Symbol('finalizeConfig'),
preprocessConfig: Symbol('preprocessConfig')
};
// used to store calculate data for faster lookup
const dataCache = new WeakMap();
/**
* Represents an array of config objects and provides method for working with
* those config objects.
*/
class ConfigArray extends Array {
/**
* Creates a new instance of ConfigArray.
* @param {Iterable|Function|Object} configs An iterable yielding config
* objects, or a config function, or a config object.
* @param {string} [options.basePath=""] The path of the config file
* @param {boolean} [options.normalized=false] Flag indicating if the
* configs have already been normalized.
* @param {Object} [options.schema] The additional schema
* definitions to use for the ConfigArray schema.
* @param {Array<string>} [options.configTypes] List of config types supported.
*/
constructor(configs,
{
basePath = '',
normalized = false,
schema: customSchema,
extraConfigTypes = []
} = {}
) {
super();
/**
* Tracks if the array has been normalized.
* @property isNormalized
* @type boolean
* @private
*/
this[ConfigArraySymbol.isNormalized] = normalized;
/**
* The schema used for validating and merging configs.
* @property schema
* @type ObjectSchema
* @private
*/
this[ConfigArraySymbol.schema] = new objectSchema.ObjectSchema({
...customSchema,
...baseSchema
});
/**
* The path of the config file that this array was loaded from.
* This is used to calculate filename matches.
* @property basePath
* @type string
*/
this.basePath = basePath;
assertExtraConfigTypes(extraConfigTypes);
/**
* The supported config types.
* @property configTypes
* @type Array<string>
*/
this.extraConfigTypes = Object.freeze([...extraConfigTypes]);
/**
* A cache to store calculated configs for faster repeat lookup.
* @property configCache
* @type Map
* @private
*/
this[ConfigArraySymbol.configCache] = new Map();
// init cache
dataCache.set(this, {});
// load the configs into this array
if (Array.isArray(configs)) {
this.push(...configs);
} else {
this.push(configs);
}
}
/**
* Prevent normal array methods from creating a new `ConfigArray` instance.
* This is to ensure that methods such as `slice()` won't try to create a
* new instance of `ConfigArray` behind the scenes as doing so may throw
* an error due to the different constructor signature.
* @returns {Function} The `Array` constructor.
*/
static get [Symbol.species]() {
return Array;
}
/**
* Returns the `files` globs from every config object in the array.
* This can be used to determine which files will be matched by a
* config array or to use as a glob pattern when no patterns are provided
* for a command line interface.
* @returns {Array<string|Function>} An array of matchers.
*/
get files() {
assertNormalized(this);
// if this data has been cached, retrieve it
const cache = dataCache.get(this);
if (cache.files) {
return cache.files;
}
// otherwise calculate it
const result = [];
for (const config of this) {
if (config.files) {
config.files.forEach(filePattern => {
result.push(filePattern);
});
}
}
// store result
cache.files = result;
dataCache.set(this, cache);
return result;
}
/**
* Returns ignore matchers that should always be ignored regardless of
* the matching `files` fields in any configs. This is necessary to mimic
* the behavior of things like .gitignore and .eslintignore, allowing a
* globbing operation to be faster.
* @returns {string[]} An array of string patterns and functions to be ignored.
*/
get ignores() {
assertNormalized(this);
// if this data has been cached, retrieve it
const cache = dataCache.get(this);
if (cache.ignores) {
return cache.ignores;
}
// otherwise calculate it
const result = [];
for (const config of this) {
if (config.ignores && !config.files) {
result.push(...config.ignores);
}
}
// store result
cache.ignores = result;
dataCache.set(this, cache);
return result;
}
/**
* Indicates if the config array has been normalized.
* @returns {boolean} True if the config array is normalized, false if not.
*/
isNormalized() {
return this[ConfigArraySymbol.isNormalized];
}
/**
* Normalizes a config array by flattening embedded arrays and executing
* config functions.
* @param {ConfigContext} context The context object for config functions.
* @returns {Promise<ConfigArray>} The current ConfigArray instance.
*/
async normalize(context = {}) {
if (!this.isNormalized()) {
const normalizedConfigs = await normalize(this, context, this.extraConfigTypes);
this.length = 0;
this.push(...normalizedConfigs.map(this[ConfigArraySymbol.preprocessConfig]));
this[ConfigArraySymbol.isNormalized] = true;
// prevent further changes
Object.freeze(this);
}
return this;
}
/**
* Normalizes a config array by flattening embedded arrays and executing
* config functions.
* @param {ConfigContext} context The context object for config functions.
* @returns {ConfigArray} The current ConfigArray instance.
*/
normalizeSync(context = {}) {
if (!this.isNormalized()) {
const normalizedConfigs = normalizeSync(this, context, this.extraConfigTypes);
this.length = 0;
this.push(...normalizedConfigs.map(this[ConfigArraySymbol.preprocessConfig]));
this[ConfigArraySymbol.isNormalized] = true;
// prevent further changes
Object.freeze(this);
}
return this;
}
/**
* Finalizes the state of a config before being cached and returned by
* `getConfig()`. Does nothing by default but is provided to be
* overridden by subclasses as necessary.
* @param {Object} config The config to finalize.
* @returns {Object} The finalized config.
*/
[ConfigArraySymbol.finalizeConfig](config) {
return config;
}
/**
* Preprocesses a config during the normalization process. This is the
* method to override if you want to convert an array item before it is
* validated for the first time. For example, if you want to replace a
* string with an object, this is the method to override.
* @param {Object} config The config to preprocess.
* @returns {Object} The config to use in place of the argument.
*/
[ConfigArraySymbol.preprocessConfig](config) {
return config;
}
/**
* Returns the config object for a given file path.
* @param {string} filePath The complete path of a file to get a config for.
* @returns {Object} The config object for this file.
*/
getConfig(filePath) {
assertNormalized(this);
// first check the cache to avoid duplicate work
let finalConfig = this[ConfigArraySymbol.configCache].get(filePath);
if (finalConfig) {
return finalConfig;
}
// TODO: Maybe move elsewhere?
const relativeFilePath = path.relative(this.basePath, filePath);
if (shouldIgnoreFilePath(this.ignores, filePath, relativeFilePath)) {
// cache and return result - finalConfig is undefined at this point
this[ConfigArraySymbol.configCache].set(filePath, finalConfig);
return finalConfig;
}
// filePath isn't automatically ignored, so try to construct config
const matchingConfigs = [];
for (const config of this) {
if (pathMatches(filePath, this.basePath, config)) {
debug(`Matching config found for ${filePath}`);
matchingConfigs.push(config);
} else {
debug(`No matching config found for ${filePath}`);
}
}
// if matching both files and ignores, there will be no config to create
if (matchingConfigs.length === 0) {
// cache and return result - finalConfig is undefined at this point
this[ConfigArraySymbol.configCache].set(filePath, finalConfig);
return finalConfig;
}
// otherwise construct the config
finalConfig = matchingConfigs.reduce((result, config) => {
return this[ConfigArraySymbol.schema].merge(result, config);
}, {}, this);
finalConfig = this[ConfigArraySymbol.finalizeConfig](finalConfig);
this[ConfigArraySymbol.configCache].set(filePath, finalConfig);
return finalConfig;
}
/**
* Determines if the given filepath is ignored based on the configs.
* @param {string} filePath The complete path of a file to check.
* @returns {boolean} True if the path is ignored, false if not.
*/
isIgnored(filePath) {
return this.getConfig(filePath) === undefined;
}
}
exports.ConfigArray = ConfigArray;
exports.ConfigArraySymbol = ConfigArraySymbol;
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