554 lines
15 KiB
JavaScript
554 lines
15 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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* NOTE: 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("node:fs"),
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{ mkdir, stat, writeFile } = require("node:fs/promises"),
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path = require("node:path"),
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{ pathToFileURL } = require("node:url"),
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{ LegacyESLint } = require("./eslint"),
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{
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ESLint,
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shouldUseFlatConfig,
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locateConfigFileToUse,
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} = require("./eslint/eslint"),
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createCLIOptions = require("./options"),
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log = require("./shared/logging"),
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RuntimeInfo = require("./shared/runtime-info"),
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translateOptions = require("./shared/translate-cli-options");
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const { getCacheFile } = require("./eslint/eslint-helpers");
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const { SuppressionsService } = require("./services/suppressions-service");
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const debug = require("debug")("eslint:cli");
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//------------------------------------------------------------------------------
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// Types
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//------------------------------------------------------------------------------
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/** @typedef {import("./options").ParsedCLIOptions} ParsedCLIOptions */
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/** @typedef {import("./types").ESLint.LintResult} LintResult */
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/** @typedef {import("./types").ESLint.ResultsMeta} ResultsMeta */
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//------------------------------------------------------------------------------
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// Helpers
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//------------------------------------------------------------------------------
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/**
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* Count error messages.
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* @param {LintResult[]} results The lint results.
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* @returns {{errorCount:number;fatalErrorCount:number,warningCount:number}} The number of error messages.
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*/
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function countErrors(results) {
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let errorCount = 0;
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let fatalErrorCount = 0;
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let warningCount = 0;
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for (const result of results) {
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errorCount += result.errorCount;
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fatalErrorCount += result.fatalErrorCount;
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warningCount += result.warningCount;
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}
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return { errorCount, fatalErrorCount, warningCount };
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}
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/**
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* Creates an options module from the provided CLI options and encodes it as a data URL.
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* @param {ParsedCLIOptions} options The CLI options.
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* @returns {URL} The URL of the options module.
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*/
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function createOptionsModule(options) {
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const translateOptionsFileURL = new URL(
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"./shared/translate-cli-options.js",
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pathToFileURL(__filename),
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).href;
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const optionsSrc =
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`import translateOptions from ${JSON.stringify(translateOptionsFileURL)};\n` +
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`export default await translateOptions(${JSON.stringify(options)}, "flat");\n`;
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// Base64 encoding is typically shorter than URL encoding
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return new URL(
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`data:text/javascript;base64,${Buffer.from(optionsSrc).toString("base64")}`,
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);
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}
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/**
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* Check if a given file path is a directory or not.
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* @param {string} filePath The path to a file to check.
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* @returns {Promise<boolean>} `true` if the given path is a directory.
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*/
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async function isDirectory(filePath) {
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try {
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return (await stat(filePath)).isDirectory();
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} catch (error) {
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if (error.code === "ENOENT" || error.code === "ENOTDIR") {
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return false;
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}
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throw error;
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}
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}
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/**
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* Outputs the results of the linting.
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* @param {ESLint} engine The ESLint instance to use.
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* @param {LintResult[]} results The results to print.
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* @param {string} format The name of the formatter to use or the path to the formatter.
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* @param {string} outputFile The path for the output file.
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* @param {ResultsMeta} resultsMeta Warning count and max threshold.
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* @returns {Promise<boolean>} True if the printing succeeds, false if not.
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* @private
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*/
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async function printResults(engine, results, format, outputFile, resultsMeta) {
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let formatter;
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try {
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formatter = await engine.loadFormatter(format);
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} catch (e) {
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log.error(e.message);
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return false;
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}
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const output = await formatter.format(results, resultsMeta);
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if (outputFile) {
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const filePath = path.resolve(process.cwd(), outputFile);
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if (await isDirectory(filePath)) {
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log.error(
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"Cannot write to output file path, it is a directory: %s",
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outputFile,
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);
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return false;
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}
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try {
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await mkdir(path.dirname(filePath), { recursive: true });
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await writeFile(filePath, output);
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} catch (ex) {
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log.error("There was a problem writing the output file:\n%s", ex);
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return false;
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}
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} else if (output) {
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log.info(output);
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}
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return true;
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}
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/**
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* Validates the `--concurrency` flag value.
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* @param {string} concurrency The `--concurrency` flag value to validate.
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* @returns {void}
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* @throws {Error} If the `--concurrency` flag value is invalid.
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*/
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function validateConcurrency(concurrency) {
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if (
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concurrency === void 0 ||
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concurrency === "auto" ||
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concurrency === "off"
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) {
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return;
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}
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const concurrencyValue = Number(concurrency);
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if (!Number.isInteger(concurrencyValue) || concurrencyValue < 1) {
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throw new Error(
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`Option concurrency: '${concurrency}' is not a positive integer, 'auto' or 'off'.`,
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);
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}
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}
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//------------------------------------------------------------------------------
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// Public Interface
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//------------------------------------------------------------------------------
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/**
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* Encapsulates all CLI behavior for eslint. Makes it easier to test as well as
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* for other Node.js programs to effectively run the CLI.
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*/
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const cli = {
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/**
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* Calculates the command string for the --inspect-config operation.
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* @param {string} configFile The path to the config file to inspect.
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* @returns {Promise<string>} The command string to execute.
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*/
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async calculateInspectConfigFlags(configFile) {
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// find the config file
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const { configFilePath, basePath } = await locateConfigFileToUse({
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cwd: process.cwd(),
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configFile,
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});
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return ["--config", configFilePath, "--basePath", basePath];
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},
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/**
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* Executes the CLI based on an array of arguments that is passed in.
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* @param {string|Array|Object} args The arguments to process.
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* @param {string} [text] The text to lint (used for TTY).
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* @param {boolean} [allowFlatConfig=true] Whether or not to allow flat config.
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* @returns {Promise<number>} The exit code for the operation.
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*/
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async execute(args, text, allowFlatConfig = true) {
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if (Array.isArray(args)) {
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debug("CLI args: %o", args.slice(2));
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}
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/*
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* Before doing anything, we need to see if we are using a
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* flat config file. If so, then we need to change the way command
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* line args are parsed. This is temporary, and when we fully
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* switch to flat config we can remove this logic.
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*/
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const usingFlatConfig =
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allowFlatConfig && (await shouldUseFlatConfig());
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debug("Using flat config?", usingFlatConfig);
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if (allowFlatConfig && !usingFlatConfig) {
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const { WarningService } = require("./services/warning-service");
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new WarningService().emitESLintRCWarning();
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}
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const CLIOptions = createCLIOptions(usingFlatConfig);
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/** @type {ParsedCLIOptions} */
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let options;
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try {
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options = CLIOptions.parse(args);
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validateConcurrency(options.concurrency);
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} catch (error) {
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debug("Error parsing CLI options:", error.message);
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let errorMessage = error.message;
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if (usingFlatConfig) {
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errorMessage +=
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"\nYou're using eslint.config.js, some command line flags are no longer available. Please see https://eslint.org/docs/latest/use/command-line-interface for details.";
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}
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log.error(errorMessage);
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return 2;
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}
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const files = options._;
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const useStdin = typeof text === "string";
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if (options.help) {
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log.info(CLIOptions.generateHelp());
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return 0;
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}
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if (options.version) {
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log.info(RuntimeInfo.version());
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return 0;
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}
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if (options.envInfo) {
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try {
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log.info(RuntimeInfo.environment());
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return 0;
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} catch (err) {
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debug("Error retrieving environment info");
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log.error(err.message);
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return 2;
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}
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}
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if (options.printConfig) {
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if (files.length) {
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log.error(
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"The --print-config option must be used with exactly one file name.",
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);
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return 2;
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}
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if (useStdin) {
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log.error(
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"The --print-config option is not available for piped-in code.",
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);
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return 2;
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}
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const engine = usingFlatConfig
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? new ESLint(await translateOptions(options, "flat"))
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: new LegacyESLint(await translateOptions(options));
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const fileConfig = await engine.calculateConfigForFile(
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options.printConfig,
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);
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log.info(JSON.stringify(fileConfig, null, " "));
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return 0;
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}
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if (options.inspectConfig) {
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log.info(
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"You can also run this command directly using 'npx @eslint/config-inspector@latest' in the same directory as your configuration file.",
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);
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try {
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const flatOptions = await translateOptions(options, "flat");
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const spawn = require("cross-spawn");
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const flags = await cli.calculateInspectConfigFlags(
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flatOptions.overrideConfigFile,
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);
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spawn.sync(
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"npx",
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["@eslint/config-inspector@latest", ...flags],
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{ encoding: "utf8", stdio: "inherit" },
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);
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} catch (error) {
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log.error(error);
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return 2;
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}
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return 0;
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}
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debug(`Running on ${useStdin ? "text" : "files"}`);
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if (options.fix && options.fixDryRun) {
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log.error(
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"The --fix option and the --fix-dry-run option cannot be used together.",
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);
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return 2;
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}
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if (useStdin && options.fix) {
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log.error(
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"The --fix option is not available for piped-in code; use --fix-dry-run instead.",
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);
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return 2;
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}
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if (options.fixType && !options.fix && !options.fixDryRun) {
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log.error(
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"The --fix-type option requires either --fix or --fix-dry-run.",
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);
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return 2;
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}
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if (
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options.reportUnusedDisableDirectives &&
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options.reportUnusedDisableDirectivesSeverity !== void 0
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) {
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log.error(
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"The --report-unused-disable-directives option and the --report-unused-disable-directives-severity option cannot be used together.",
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);
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return 2;
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}
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if (usingFlatConfig && options.ext) {
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// Passing `--ext ""` results in `options.ext` being an empty array.
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if (options.ext.length === 0) {
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log.error("The --ext option value cannot be empty.");
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return 2;
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}
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// Passing `--ext ,ts` results in an empty string at index 0. Passing `--ext ts,,tsx` results in an empty string at index 1.
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const emptyStringIndex = options.ext.indexOf("");
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if (emptyStringIndex >= 0) {
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log.error(
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`The --ext option arguments cannot be empty strings. Found an empty string at index ${emptyStringIndex}.`,
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);
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return 2;
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}
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}
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if (options.suppressAll && options.suppressRule) {
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log.error(
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"The --suppress-all option and the --suppress-rule option cannot be used together.",
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);
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return 2;
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}
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if (options.suppressAll && options.pruneSuppressions) {
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log.error(
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"The --suppress-all option and the --prune-suppressions option cannot be used together.",
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);
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return 2;
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}
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if (options.suppressRule && options.pruneSuppressions) {
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log.error(
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"The --suppress-rule option and the --prune-suppressions option cannot be used together.",
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);
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return 2;
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}
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if (
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useStdin &&
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(options.suppressAll ||
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options.suppressRule ||
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options.pruneSuppressions)
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) {
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log.error(
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"The --suppress-all, --suppress-rule, and --prune-suppressions options cannot be used with piped-in code.",
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);
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return 2;
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}
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const ActiveESLint = usingFlatConfig ? ESLint : LegacyESLint;
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/** @type {ESLint|LegacyESLint} */
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let engine;
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if (options.concurrency && options.concurrency !== "off") {
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const optionsURL = createOptionsModule(options);
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engine = await ESLint.fromOptionsModule(optionsURL);
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} else {
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const eslintOptions = await translateOptions(
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options,
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usingFlatConfig ? "flat" : "eslintrc",
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);
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engine = new ActiveESLint(eslintOptions);
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}
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let results;
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if (useStdin) {
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results = await engine.lintText(text, {
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filePath: options.stdinFilename,
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// flatConfig respects CLI flag and constructor warnIgnored, eslintrc forces true for backwards compatibility
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warnIgnored: usingFlatConfig ? void 0 : true,
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});
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} else {
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results = await engine.lintFiles(files);
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}
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if (options.fix) {
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debug("Fix mode enabled - applying fixes");
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await ActiveESLint.outputFixes(results);
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}
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let unusedSuppressions = {};
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if (!useStdin) {
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const suppressionsFileLocation = getCacheFile(
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options.suppressionsLocation || "eslint-suppressions.json",
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process.cwd(),
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{
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prefix: "suppressions_",
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},
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);
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if (
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options.suppressionsLocation &&
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!fs.existsSync(suppressionsFileLocation) &&
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!options.suppressAll &&
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!options.suppressRule
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) {
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log.error(
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"The suppressions file does not exist. Please run the command with `--suppress-all` or `--suppress-rule` to create it.",
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);
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return 2;
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}
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if (
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options.suppressAll ||
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options.suppressRule ||
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options.pruneSuppressions ||
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fs.existsSync(suppressionsFileLocation)
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) {
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const suppressions = new SuppressionsService({
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filePath: suppressionsFileLocation,
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cwd: process.cwd(),
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});
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if (options.suppressAll || options.suppressRule) {
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await suppressions.suppress(results, options.suppressRule);
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}
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if (options.pruneSuppressions) {
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await suppressions.prune(results);
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}
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const suppressionResults = suppressions.applySuppressions(
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results,
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await suppressions.load(),
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);
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results = suppressionResults.results;
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unusedSuppressions = suppressionResults.unused;
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}
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}
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let resultsToPrint = results;
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if (options.quiet) {
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debug("Quiet mode enabled - filtering out warnings");
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resultsToPrint = ActiveESLint.getErrorResults(resultsToPrint);
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}
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const resultCounts = countErrors(results);
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const tooManyWarnings =
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options.maxWarnings >= 0 &&
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resultCounts.warningCount > options.maxWarnings;
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const resultsMeta = tooManyWarnings
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? {
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maxWarningsExceeded: {
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maxWarnings: options.maxWarnings,
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foundWarnings: resultCounts.warningCount,
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},
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}
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: {};
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if (
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await printResults(
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engine,
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resultsToPrint,
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options.format,
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options.outputFile,
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resultsMeta,
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)
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) {
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// Errors and warnings from the original unfiltered results should determine the exit code
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const shouldExitForFatalErrors =
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options.exitOnFatalError && resultCounts.fatalErrorCount > 0;
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if (!resultCounts.errorCount && tooManyWarnings) {
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log.error(
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"ESLint found too many warnings (maximum: %s).",
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options.maxWarnings,
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);
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}
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if (!options.passOnUnprunedSuppressions) {
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const unusedSuppressionsCount =
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Object.keys(unusedSuppressions).length;
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if (unusedSuppressionsCount > 0) {
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log.error(
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"There are suppressions left that do not occur anymore. Consider re-running the command with `--prune-suppressions`.",
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);
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debug(JSON.stringify(unusedSuppressions, null, 2));
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return 2;
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}
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}
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if (shouldExitForFatalErrors) {
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return 2;
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}
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return resultCounts.errorCount || tooManyWarnings ? 1 : 0;
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}
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return 2;
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},
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};
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module.exports = cli;
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