716 lines
25 KiB
JavaScript
716 lines
25 KiB
JavaScript
/**
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* @fileoverview Main CLI object.
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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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* The CLI object should *not* call process.exit() directly. It should only return
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* exit codes. This allows other programs to use the CLI object and still control
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* when the program exits.
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*/
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const fs = require("fs"),
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path = require("path"),
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defaultOptions = require("../conf/default-cli-options"),
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Linter = require("./linter"),
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IgnoredPaths = require("./ignored-paths"),
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Config = require("./config"),
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fileEntryCache = require("file-entry-cache"),
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globUtil = require("./util/glob-util"),
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validator = require("./config/config-validator"),
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stringify = require("json-stable-stringify-without-jsonify"),
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hash = require("./util/hash"),
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ModuleResolver = require("./util/module-resolver"),
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naming = require("./util/naming"),
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pkg = require("../package.json");
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const debug = require("debug")("eslint:cli-engine");
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const resolver = new ModuleResolver();
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//------------------------------------------------------------------------------
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// Typedefs
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//------------------------------------------------------------------------------
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/**
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* The options to configure a CLI engine with.
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* @typedef {Object} CLIEngineOptions
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* @property {boolean} allowInlineConfig Enable or disable inline configuration comments.
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* @property {boolean|Object} baseConfig Base config object. True enables recommend rules and environments.
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* @property {boolean} cache Enable result caching.
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* @property {string} cacheLocation The cache file to use instead of .eslintcache.
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* @property {string} configFile The configuration file to use.
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* @property {string} cwd The value to use for the current working directory.
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* @property {string[]} envs An array of environments to load.
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* @property {string[]} extensions An array of file extensions to check.
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* @property {boolean|Function} fix Execute in autofix mode. If a function, should return a boolean.
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* @property {string[]} globals An array of global variables to declare.
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* @property {boolean} ignore False disables use of .eslintignore.
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* @property {string} ignorePath The ignore file to use instead of .eslintignore.
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* @property {string} ignorePattern A glob pattern of files to ignore.
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* @property {boolean} useEslintrc False disables looking for .eslintrc
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* @property {string} parser The name of the parser to use.
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* @property {Object} parserOptions An object of parserOption settings to use.
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* @property {string[]} plugins An array of plugins to load.
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* @property {Object<string,*>} rules An object of rules to use.
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* @property {string[]} rulePaths An array of directories to load custom rules from.
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* @property {boolean} reportUnusedDisableDirectives `true` adds reports for unused eslint-disable directives
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*/
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/**
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* A linting warning or error.
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* @typedef {Object} LintMessage
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* @property {string} message The message to display to the user.
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*/
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/**
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* A linting result.
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* @typedef {Object} LintResult
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* @property {string} filePath The path to the file that was linted.
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* @property {LintMessage[]} messages All of the messages for the result.
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* @property {number} errorCount Number of errors for the result.
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* @property {number} warningCount Number of warnings for the result.
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* @property {number} fixableErrorCount Number of fixable errors for the result.
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* @property {number} fixableWarningCount Number of fixable warnings for the result.
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* @property {string=} [source] The source code of the file that was linted.
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* @property {string=} [output] The source code of the file that was linted, with as many fixes applied as possible.
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*/
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//------------------------------------------------------------------------------
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// Helpers
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//------------------------------------------------------------------------------
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/**
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* It will calculate the error and warning count for collection of messages per file
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* @param {Object[]} messages - Collection of messages
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* @returns {Object} Contains the stats
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* @private
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*/
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function calculateStatsPerFile(messages) {
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return messages.reduce((stat, message) => {
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if (message.fatal || message.severity === 2) {
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stat.errorCount++;
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if (message.fix) {
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stat.fixableErrorCount++;
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}
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} else {
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stat.warningCount++;
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if (message.fix) {
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stat.fixableWarningCount++;
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}
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}
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return stat;
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}, {
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errorCount: 0,
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warningCount: 0,
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fixableErrorCount: 0,
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fixableWarningCount: 0
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});
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}
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/**
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* It will calculate the error and warning count for collection of results from all files
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* @param {Object[]} results - Collection of messages from all the files
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* @returns {Object} Contains the stats
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* @private
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*/
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function calculateStatsPerRun(results) {
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return results.reduce((stat, result) => {
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stat.errorCount += result.errorCount;
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stat.warningCount += result.warningCount;
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stat.fixableErrorCount += result.fixableErrorCount;
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stat.fixableWarningCount += result.fixableWarningCount;
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return stat;
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}, {
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errorCount: 0,
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warningCount: 0,
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fixableErrorCount: 0,
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fixableWarningCount: 0
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});
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}
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/**
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* Processes an source code using ESLint.
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* @param {string} text The source code to check.
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* @param {Object} configHelper The configuration options for ESLint.
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* @param {string} filename An optional string representing the texts filename.
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* @param {boolean|Function} fix Indicates if fixes should be processed.
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* @param {boolean} allowInlineConfig Allow/ignore comments that change config.
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* @param {boolean} reportUnusedDisableDirectives Allow/ignore comments that change config.
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* @param {Linter} linter Linter context
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* @returns {LintResult} The results for linting on this text.
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* @private
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*/
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function processText(text, configHelper, filename, fix, allowInlineConfig, reportUnusedDisableDirectives, linter) {
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let filePath,
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fileExtension,
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processor;
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if (filename) {
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filePath = path.resolve(filename);
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fileExtension = path.extname(filename);
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}
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filename = filename || "<text>";
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debug(`Linting ${filename}`);
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const config = configHelper.getConfig(filePath);
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if (config.plugins) {
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configHelper.plugins.loadAll(config.plugins);
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}
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const loadedPlugins = configHelper.plugins.getAll();
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for (const plugin in loadedPlugins) {
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if (loadedPlugins[plugin].processors && Object.keys(loadedPlugins[plugin].processors).indexOf(fileExtension) >= 0) {
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processor = loadedPlugins[plugin].processors[fileExtension];
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break;
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}
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}
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const autofixingEnabled = typeof fix !== "undefined" && (!processor || processor.supportsAutofix);
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const fixedResult = linter.verifyAndFix(text, config, {
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filename,
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allowInlineConfig,
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reportUnusedDisableDirectives,
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fix: !!autofixingEnabled && fix,
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preprocess: processor && (rawText => processor.preprocess(rawText, filename)),
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postprocess: processor && (problemLists => processor.postprocess(problemLists, filename))
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});
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const stats = calculateStatsPerFile(fixedResult.messages);
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const result = {
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filePath: filename,
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messages: fixedResult.messages,
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errorCount: stats.errorCount,
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warningCount: stats.warningCount,
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fixableErrorCount: stats.fixableErrorCount,
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fixableWarningCount: stats.fixableWarningCount
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};
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if (fixedResult.fixed) {
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result.output = fixedResult.output;
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}
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if (result.errorCount + result.warningCount > 0 && typeof result.output === "undefined") {
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result.source = text;
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}
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return result;
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}
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/**
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* Processes an individual file using ESLint. Files used here are known to
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* exist, so no need to check that here.
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* @param {string} filename The filename of the file being checked.
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* @param {Object} configHelper The configuration options for ESLint.
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* @param {Object} options The CLIEngine options object.
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* @param {Linter} linter Linter context
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* @returns {LintResult} The results for linting on this file.
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* @private
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*/
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function processFile(filename, configHelper, options, linter) {
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const text = fs.readFileSync(path.resolve(filename), "utf8"),
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result = processText(
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text,
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configHelper,
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filename,
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options.fix,
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options.allowInlineConfig,
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options.reportUnusedDisableDirectives,
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linter
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);
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return result;
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}
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/**
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* Returns result with warning by ignore settings
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* @param {string} filePath - File path of checked code
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* @param {string} baseDir - Absolute path of base directory
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* @returns {LintResult} Result with single warning
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* @private
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*/
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function createIgnoreResult(filePath, baseDir) {
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let message;
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const isHidden = /^\./.test(path.basename(filePath));
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const isInNodeModules = baseDir && path.relative(baseDir, filePath).startsWith("node_modules");
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const isInBowerComponents = baseDir && path.relative(baseDir, filePath).startsWith("bower_components");
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if (isHidden) {
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message = "File ignored by default. Use a negated ignore pattern (like \"--ignore-pattern '!<relative/path/to/filename>'\") to override.";
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} else if (isInNodeModules) {
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message = "File ignored by default. Use \"--ignore-pattern '!node_modules/*'\" to override.";
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} else if (isInBowerComponents) {
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message = "File ignored by default. Use \"--ignore-pattern '!bower_components/*'\" to override.";
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} else {
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message = "File ignored because of a matching ignore pattern. Use \"--no-ignore\" to override.";
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}
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return {
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filePath: path.resolve(filePath),
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messages: [
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{
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fatal: false,
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severity: 1,
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message
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}
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],
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errorCount: 0,
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warningCount: 1,
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fixableErrorCount: 0,
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fixableWarningCount: 0
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};
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}
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/**
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* Checks if the given message is an error message.
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* @param {Object} message The message to check.
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* @returns {boolean} Whether or not the message is an error message.
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* @private
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*/
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function isErrorMessage(message) {
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return message.severity === 2;
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}
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/**
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* return the cacheFile to be used by eslint, based on whether the provided parameter is
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* a directory or looks like a directory (ends in `path.sep`), in which case the file
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* name will be the `cacheFile/.cache_hashOfCWD`
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*
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* if cacheFile points to a file or looks like a file then in will just use that file
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*
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* @param {string} cacheFile The name of file to be used to store the cache
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* @param {string} cwd Current working directory
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* @returns {string} the resolved path to the cache file
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*/
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function getCacheFile(cacheFile, cwd) {
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/*
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* make sure the path separators are normalized for the environment/os
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* keeping the trailing path separator if present
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*/
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cacheFile = path.normalize(cacheFile);
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const resolvedCacheFile = path.resolve(cwd, cacheFile);
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const looksLikeADirectory = cacheFile[cacheFile.length - 1] === path.sep;
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/**
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* return the name for the cache file in case the provided parameter is a directory
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* @returns {string} the resolved path to the cacheFile
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*/
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function getCacheFileForDirectory() {
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return path.join(resolvedCacheFile, `.cache_${hash(cwd)}`);
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}
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let fileStats;
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try {
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fileStats = fs.lstatSync(resolvedCacheFile);
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} catch (ex) {
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fileStats = null;
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}
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/*
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* in case the file exists we need to verify if the provided path
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* is a directory or a file. If it is a directory we want to create a file
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* inside that directory
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*/
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if (fileStats) {
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/*
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* is a directory or is a file, but the original file the user provided
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* looks like a directory but `path.resolve` removed the `last path.sep`
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* so we need to still treat this like a directory
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*/
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if (fileStats.isDirectory() || looksLikeADirectory) {
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return getCacheFileForDirectory();
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}
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// is file so just use that file
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return resolvedCacheFile;
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}
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/*
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* here we known the file or directory doesn't exist,
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* so we will try to infer if its a directory if it looks like a directory
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* for the current operating system.
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*/
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// if the last character passed is a path separator we assume is a directory
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if (looksLikeADirectory) {
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return getCacheFileForDirectory();
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}
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return resolvedCacheFile;
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}
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const configHashCache = new WeakMap();
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//------------------------------------------------------------------------------
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// Public Interface
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//------------------------------------------------------------------------------
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class CLIEngine {
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/**
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* Creates a new instance of the core CLI engine.
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* @param {CLIEngineOptions} options The options for this instance.
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* @constructor
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*/
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constructor(options) {
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options = Object.assign(
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Object.create(null),
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defaultOptions,
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{ cwd: process.cwd() },
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options
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);
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/**
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* Stored options for this instance
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* @type {Object}
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*/
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this.options = options;
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this.linter = new Linter();
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if (options.cache) {
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const cacheFile = getCacheFile(this.options.cacheLocation || this.options.cacheFile, this.options.cwd);
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/**
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* Cache used to avoid operating on files that haven't changed since the
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* last successful execution (e.g., file passed linting with no errors and
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* no warnings).
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* @type {Object}
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*/
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this._fileCache = fileEntryCache.create(cacheFile);
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}
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// load in additional rules
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if (this.options.rulePaths) {
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const cwd = this.options.cwd;
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this.options.rulePaths.forEach(rulesdir => {
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debug(`Loading rules from ${rulesdir}`);
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this.linter.rules.load(rulesdir, cwd);
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});
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}
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if (this.options.rules && Object.keys(this.options.rules).length) {
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const loadedRules = this.linter.getRules();
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Object.keys(this.options.rules).forEach(name => {
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validator.validateRuleOptions(loadedRules.get(name), name, this.options.rules[name], "CLI");
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});
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}
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this.config = new Config(this.options, this.linter);
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}
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/**
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* Returns results that only contains errors.
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* @param {LintResult[]} results The results to filter.
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* @returns {LintResult[]} The filtered results.
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*/
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static getErrorResults(results) {
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const filtered = [];
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results.forEach(result => {
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const filteredMessages = result.messages.filter(isErrorMessage);
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if (filteredMessages.length > 0) {
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filtered.push(
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Object.assign(result, {
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messages: filteredMessages,
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errorCount: filteredMessages.length,
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warningCount: 0,
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fixableErrorCount: result.fixableErrorCount,
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fixableWarningCount: 0
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})
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);
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}
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});
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return filtered;
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}
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/**
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* Outputs fixes from the given results to files.
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* @param {Object} report The report object created by CLIEngine.
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* @returns {void}
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*/
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static outputFixes(report) {
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report.results.filter(result => result.hasOwnProperty("output")).forEach(result => {
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fs.writeFileSync(result.filePath, result.output);
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});
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}
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/**
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* Add a plugin by passing its configuration
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* @param {string} name Name of the plugin.
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* @param {Object} pluginobject Plugin configuration object.
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* @returns {void}
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*/
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addPlugin(name, pluginobject) {
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this.config.plugins.define(name, pluginobject);
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}
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/**
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* Resolves the patterns passed into executeOnFiles() into glob-based patterns
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* for easier handling.
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* @param {string[]} patterns The file patterns passed on the command line.
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* @returns {string[]} The equivalent glob patterns.
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*/
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resolveFileGlobPatterns(patterns) {
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return globUtil.resolveFileGlobPatterns(patterns, this.options);
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}
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/**
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* Executes the current configuration on an array of file and directory names.
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* @param {string[]} patterns An array of file and directory names.
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* @returns {Object} The results for all files that were linted.
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*/
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executeOnFiles(patterns) {
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const options = this.options,
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fileCache = this._fileCache,
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configHelper = this.config;
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const cacheFile = getCacheFile(this.options.cacheLocation || this.options.cacheFile, this.options.cwd);
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if (!options.cache && fs.existsSync(cacheFile)) {
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fs.unlinkSync(cacheFile);
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}
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/**
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* Calculates the hash of the config file used to validate a given file
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* @param {string} filename The path of the file to retrieve a config object for to calculate the hash
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* @returns {string} the hash of the config
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*/
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function hashOfConfigFor(filename) {
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const config = configHelper.getConfig(filename);
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if (!configHashCache.has(config)) {
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configHashCache.set(config, hash(`${pkg.version}_${stringify(config)}`));
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}
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return configHashCache.get(config);
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}
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const startTime = Date.now();
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const fileList = globUtil.listFilesToProcess(this.resolveFileGlobPatterns(patterns), options);
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const results = fileList.map(fileInfo => {
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if (fileInfo.ignored) {
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return createIgnoreResult(fileInfo.filename, options.cwd);
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}
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if (options.cache) {
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/*
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* get the descriptor for this file
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* with the metadata and the flag that determines if
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* the file has changed
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*/
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const descriptor = fileCache.getFileDescriptor(fileInfo.filename);
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const hashOfConfig = hashOfConfigFor(fileInfo.filename);
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const changed = descriptor.changed || descriptor.meta.hashOfConfig !== hashOfConfig;
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if (!changed) {
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debug(`Skipping file since hasn't changed: ${fileInfo.filename}`);
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/*
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* Add the the cached results (always will be 0 error and
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* 0 warnings). We should not cache results for files that
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* failed, in order to guarantee that next execution will
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* process those files as well.
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*/
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return descriptor.meta.results;
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}
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}
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|
|
debug(`Processing ${fileInfo.filename}`);
|
|
|
|
return processFile(fileInfo.filename, configHelper, options, this.linter);
|
|
});
|
|
|
|
if (options.cache) {
|
|
results.forEach(result => {
|
|
if (result.messages.length) {
|
|
|
|
/*
|
|
* if a file contains errors or warnings we don't want to
|
|
* store the file in the cache so we can guarantee that
|
|
* next execution will also operate on this file
|
|
*/
|
|
fileCache.removeEntry(result.filePath);
|
|
} else {
|
|
|
|
/*
|
|
* since the file passed we store the result here
|
|
* TODO: it might not be necessary to store the results list in the cache,
|
|
* since it should always be 0 errors/warnings
|
|
*/
|
|
const descriptor = fileCache.getFileDescriptor(result.filePath);
|
|
|
|
descriptor.meta.hashOfConfig = hashOfConfigFor(result.filePath);
|
|
descriptor.meta.results = result;
|
|
}
|
|
});
|
|
|
|
// persist the cache to disk
|
|
fileCache.reconcile();
|
|
}
|
|
|
|
const stats = calculateStatsPerRun(results);
|
|
|
|
debug(`Linting complete in: ${Date.now() - startTime}ms`);
|
|
|
|
return {
|
|
results,
|
|
errorCount: stats.errorCount,
|
|
warningCount: stats.warningCount,
|
|
fixableErrorCount: stats.fixableErrorCount,
|
|
fixableWarningCount: stats.fixableWarningCount
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Executes the current configuration on text.
|
|
* @param {string} text A string of JavaScript code to lint.
|
|
* @param {string} filename An optional string representing the texts filename.
|
|
* @param {boolean} warnIgnored Always warn when a file is ignored
|
|
* @returns {Object} The results for the linting.
|
|
*/
|
|
executeOnText(text, filename, warnIgnored) {
|
|
|
|
const results = [],
|
|
options = this.options,
|
|
configHelper = this.config,
|
|
ignoredPaths = new IgnoredPaths(options);
|
|
|
|
// resolve filename based on options.cwd (for reporting, ignoredPaths also resolves)
|
|
if (filename && !path.isAbsolute(filename)) {
|
|
filename = path.resolve(options.cwd, filename);
|
|
}
|
|
|
|
if (filename && ignoredPaths.contains(filename)) {
|
|
if (warnIgnored) {
|
|
results.push(createIgnoreResult(filename, options.cwd));
|
|
}
|
|
} else {
|
|
results.push(
|
|
processText(
|
|
text,
|
|
configHelper,
|
|
filename,
|
|
options.fix,
|
|
options.allowInlineConfig,
|
|
options.reportUnusedDisableDirectives,
|
|
this.linter
|
|
)
|
|
);
|
|
}
|
|
|
|
const stats = calculateStatsPerRun(results);
|
|
|
|
return {
|
|
results,
|
|
errorCount: stats.errorCount,
|
|
warningCount: stats.warningCount,
|
|
fixableErrorCount: stats.fixableErrorCount,
|
|
fixableWarningCount: stats.fixableWarningCount
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Returns a configuration object for the given file based on the CLI options.
|
|
* This is the same logic used by the ESLint CLI executable to determine
|
|
* configuration for each file it processes.
|
|
* @param {string} filePath The path of the file to retrieve a config object for.
|
|
* @returns {Object} A configuration object for the file.
|
|
*/
|
|
getConfigForFile(filePath) {
|
|
const configHelper = this.config;
|
|
|
|
return configHelper.getConfig(filePath);
|
|
}
|
|
|
|
/**
|
|
* Checks if a given path is ignored by ESLint.
|
|
* @param {string} filePath The path of the file to check.
|
|
* @returns {boolean} Whether or not the given path is ignored.
|
|
*/
|
|
isPathIgnored(filePath) {
|
|
const resolvedPath = path.resolve(this.options.cwd, filePath);
|
|
const ignoredPaths = new IgnoredPaths(this.options);
|
|
|
|
return ignoredPaths.contains(resolvedPath);
|
|
}
|
|
|
|
/**
|
|
* Returns the formatter representing the given format or null if no formatter
|
|
* with the given name can be found.
|
|
* @param {string} [format] The name of the format to load or the path to a
|
|
* custom formatter.
|
|
* @returns {Function} The formatter function or null if not found.
|
|
*/
|
|
getFormatter(format) {
|
|
|
|
|
|
// default is stylish
|
|
format = format || "stylish";
|
|
|
|
// only strings are valid formatters
|
|
if (typeof format === "string") {
|
|
|
|
// replace \ with / for Windows compatibility
|
|
format = format.replace(/\\/g, "/");
|
|
|
|
const cwd = this.options ? this.options.cwd : process.cwd();
|
|
const namespace = naming.getNamespaceFromTerm(format);
|
|
|
|
let formatterPath;
|
|
|
|
// if there's a slash, then it's a file
|
|
if (!namespace && format.indexOf("/") > -1) {
|
|
formatterPath = path.resolve(cwd, format);
|
|
} else {
|
|
try {
|
|
const npmFormat = naming.normalizePackageName(format, "eslint-formatter");
|
|
|
|
formatterPath = resolver.resolve(npmFormat, `${cwd}/node_modules`);
|
|
} catch (e) {
|
|
formatterPath = `./formatters/${format}`;
|
|
}
|
|
}
|
|
|
|
try {
|
|
return require(formatterPath);
|
|
} catch (ex) {
|
|
ex.message = `There was a problem loading formatter: ${formatterPath}\nError: ${ex.message}`;
|
|
throw ex;
|
|
}
|
|
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
}
|
|
|
|
CLIEngine.version = pkg.version;
|
|
CLIEngine.getFormatter = CLIEngine.prototype.getFormatter;
|
|
|
|
module.exports = CLIEngine;
|