vue hello world项目
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/**
* @fileoverview Validates configs.
* @author Brandon Mills
*/
"use strict";
/* eslint class-methods-use-this: "off" */
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const
util = require("util"),
configSchema = require("../../conf/config-schema"),
BuiltInEnvironments = require("../../conf/environments"),
ConfigOps = require("./config-ops"),
{ emitDeprecationWarning } = require("./deprecation-warnings");
const ajv = require("./ajv")();
const ruleValidators = new WeakMap();
const noop = Function.prototype;
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
let validateSchema;
const severityMap = {
error: 2,
warn: 1,
off: 0
};
const validated = new WeakSet();
//-----------------------------------------------------------------------------
// Exports
//-----------------------------------------------------------------------------
module.exports = class ConfigValidator {
constructor({ builtInRules = new Map() } = {}) {
this.builtInRules = builtInRules;
}
/**
* Gets a complete options schema for a rule.
* @param {{create: Function, schema: (Array|null)}} rule A new-style rule object
* @returns {Object} JSON Schema for the rule's options.
*/
getRuleOptionsSchema(rule) {
if (!rule) {
return null;
}
const schema = rule.schema || rule.meta && rule.meta.schema;
// Given a tuple of schemas, insert warning level at the beginning
if (Array.isArray(schema)) {
if (schema.length) {
return {
type: "array",
items: schema,
minItems: 0,
maxItems: schema.length
};
}
return {
type: "array",
minItems: 0,
maxItems: 0
};
}
// Given a full schema, leave it alone
return schema || null;
}
/**
* Validates a rule's severity and returns the severity value. Throws an error if the severity is invalid.
* @param {options} options The given options for the rule.
* @returns {number|string} The rule's severity value
*/
validateRuleSeverity(options) {
const severity = Array.isArray(options) ? options[0] : options;
const normSeverity = typeof severity === "string" ? severityMap[severity.toLowerCase()] : severity;
if (normSeverity === 0 || normSeverity === 1 || normSeverity === 2) {
return normSeverity;
}
throw new Error(`\tSeverity should be one of the following: 0 = off, 1 = warn, 2 = error (you passed '${util.inspect(severity).replace(/'/gu, "\"").replace(/\n/gu, "")}').\n`);
}
/**
* Validates the non-severity options passed to a rule, based on its schema.
* @param {{create: Function}} rule The rule to validate
* @param {Array} localOptions The options for the rule, excluding severity
* @returns {void}
*/
validateRuleSchema(rule, localOptions) {
if (!ruleValidators.has(rule)) {
const schema = this.getRuleOptionsSchema(rule);
if (schema) {
ruleValidators.set(rule, ajv.compile(schema));
}
}
const validateRule = ruleValidators.get(rule);
if (validateRule) {
validateRule(localOptions);
if (validateRule.errors) {
throw new Error(validateRule.errors.map(
error => `\tValue ${JSON.stringify(error.data)} ${error.message}.\n`
).join(""));
}
}
}
/**
* Validates a rule's options against its schema.
* @param {{create: Function}|null} rule The rule that the config is being validated for
* @param {string} ruleId The rule's unique name.
* @param {Array|number} options The given options for the rule.
* @param {string|null} source The name of the configuration source to report in any errors. If null or undefined,
* no source is prepended to the message.
* @returns {void}
*/
validateRuleOptions(rule, ruleId, options, source = null) {
try {
const severity = this.validateRuleSeverity(options);
if (severity !== 0) {
this.validateRuleSchema(rule, Array.isArray(options) ? options.slice(1) : []);
}
} catch (err) {
const enhancedMessage = `Configuration for rule "${ruleId}" is invalid:\n${err.message}`;
if (typeof source === "string") {
throw new Error(`${source}:\n\t${enhancedMessage}`);
} else {
throw new Error(enhancedMessage);
}
}
}
/**
* Validates an environment object
* @param {Object} environment The environment config object to validate.
* @param {string} source The name of the configuration source to report in any errors.
* @param {function(envId:string): Object} [getAdditionalEnv] A map from strings to loaded environments.
* @returns {void}
*/
validateEnvironment(
environment,
source,
getAdditionalEnv = noop
) {
// not having an environment is ok
if (!environment) {
return;
}
Object.keys(environment).forEach(id => {
const env = getAdditionalEnv(id) || BuiltInEnvironments.get(id) || null;
if (!env) {
const message = `${source}:\n\tEnvironment key "${id}" is unknown\n`;
throw new Error(message);
}
});
}
/**
* Validates a rules config object
* @param {Object} rulesConfig The rules config object to validate.
* @param {string} source The name of the configuration source to report in any errors.
* @param {function(ruleId:string): Object} getAdditionalRule A map from strings to loaded rules
* @returns {void}
*/
validateRules(
rulesConfig,
source,
getAdditionalRule = noop
) {
if (!rulesConfig) {
return;
}
Object.keys(rulesConfig).forEach(id => {
const rule = getAdditionalRule(id) || this.builtInRules.get(id) || null;
this.validateRuleOptions(rule, id, rulesConfig[id], source);
});
}
/**
* Validates a `globals` section of a config file
* @param {Object} globalsConfig The `globals` section
* @param {string|null} source The name of the configuration source to report in the event of an error.
* @returns {void}
*/
validateGlobals(globalsConfig, source = null) {
if (!globalsConfig) {
return;
}
Object.entries(globalsConfig)
.forEach(([configuredGlobal, configuredValue]) => {
try {
ConfigOps.normalizeConfigGlobal(configuredValue);
} catch (err) {
throw new Error(`ESLint configuration of global '${configuredGlobal}' in ${source} is invalid:\n${err.message}`);
}
});
}
/**
* Validate `processor` configuration.
* @param {string|undefined} processorName The processor name.
* @param {string} source The name of config file.
* @param {function(id:string): Processor} getProcessor The getter of defined processors.
* @returns {void}
*/
validateProcessor(processorName, source, getProcessor) {
if (processorName && !getProcessor(processorName)) {
throw new Error(`ESLint configuration of processor in '${source}' is invalid: '${processorName}' was not found.`);
}
}
/**
* Formats an array of schema validation errors.
* @param {Array} errors An array of error messages to format.
* @returns {string} Formatted error message
*/
formatErrors(errors) {
return errors.map(error => {
if (error.keyword === "additionalProperties") {
const formattedPropertyPath = error.dataPath.length ? `${error.dataPath.slice(1)}.${error.params.additionalProperty}` : error.params.additionalProperty;
return `Unexpected top-level property "${formattedPropertyPath}"`;
}
if (error.keyword === "type") {
const formattedField = error.dataPath.slice(1);
const formattedExpectedType = Array.isArray(error.schema) ? error.schema.join("/") : error.schema;
const formattedValue = JSON.stringify(error.data);
return `Property "${formattedField}" is the wrong type (expected ${formattedExpectedType} but got \`${formattedValue}\`)`;
}
const field = error.dataPath[0] === "." ? error.dataPath.slice(1) : error.dataPath;
return `"${field}" ${error.message}. Value: ${JSON.stringify(error.data)}`;
}).map(message => `\t- ${message}.\n`).join("");
}
/**
* Validates the top level properties of the config object.
* @param {Object} config The config object to validate.
* @param {string} source The name of the configuration source to report in any errors.
* @returns {void}
*/
validateConfigSchema(config, source = null) {
validateSchema = validateSchema || ajv.compile(configSchema);
if (!validateSchema(config)) {
throw new Error(`ESLint configuration in ${source} is invalid:\n${this.formatErrors(validateSchema.errors)}`);
}
if (Object.hasOwnProperty.call(config, "ecmaFeatures")) {
emitDeprecationWarning(source, "ESLINT_LEGACY_ECMAFEATURES");
}
}
/**
* Validates an entire config object.
* @param {Object} config The config object to validate.
* @param {string} source The name of the configuration source to report in any errors.
* @param {function(ruleId:string): Object} [getAdditionalRule] A map from strings to loaded rules.
* @param {function(envId:string): Object} [getAdditionalEnv] A map from strings to loaded envs.
* @returns {void}
*/
validate(config, source, getAdditionalRule, getAdditionalEnv) {
this.validateConfigSchema(config, source);
this.validateRules(config.rules, source, getAdditionalRule);
this.validateEnvironment(config.env, source, getAdditionalEnv);
this.validateGlobals(config.globals, source);
for (const override of config.overrides || []) {
this.validateRules(override.rules, source, getAdditionalRule);
this.validateEnvironment(override.env, source, getAdditionalEnv);
this.validateGlobals(config.globals, source);
}
}
/**
* Validate config array object.
* @param {ConfigArray} configArray The config array to validate.
* @returns {void}
*/
validateConfigArray(configArray) {
const getPluginEnv = Map.prototype.get.bind(configArray.pluginEnvironments);
const getPluginProcessor = Map.prototype.get.bind(configArray.pluginProcessors);
const getPluginRule = Map.prototype.get.bind(configArray.pluginRules);
// Validate.
for (const element of configArray) {
if (validated.has(element)) {
continue;
}
validated.add(element);
this.validateEnvironment(element.env, element.name, getPluginEnv);
this.validateGlobals(element.globals, element.name);
this.validateProcessor(element.processor, element.name, getPluginProcessor);
this.validateRules(element.rules, element.name, getPluginRule);
}
}
};