stylelint/lib/cli.js

'use strict';

const { EOL } = require('os');
const meow = require('meow');
const path = require('path');
const { red, dim } = require('picocolors');

const checkInvalidCLIOptions = require('./utils/checkInvalidCLIOptions');
const getFormatterOptionsText = require('./utils/getFormatterOptionsText');
const getModulePath = require('./utils/getModulePath');
const getStdin = require('./utils/getStdin');
const printConfig = require('./printConfig');
const resolveFrom = require('resolve-from');
const standalone = require('./standalone');
const writeOutputFile = require('./writeOutputFile');
const resolveCustomFormatter = require('./resolveCustomFormatter');

const EXIT_CODE_ERROR = 2;

/**
 * @typedef {object} CLIFlags
 * @property {boolean} [cache]
 * @property {string} [cacheLocation]
 * @property {string | false} config
 * @property {string} [configBasedir]
 * @property {string} [customSyntax]
 * @property {string} [printConfig]
 * @property {string} [color]
 * @property {string} [customFormatter]
 * @property {boolean} [disableDefaultIgnores]
 * @property {boolean} [fix]
 * @property {string} [formatter="string"]
 * @property {string} [help]
 * @property {boolean} [ignoreDisables]
 * @property {string[]} [ignorePath]
 * @property {string[]} [ignorePattern]
 * @property {string} [noColor]
 * @property {string} [outputFile]
 * @property {boolean} [stdin]
 * @property {string} [stdinFilename]
 * @property {boolean} [reportNeedlessDisables]
 * @property {boolean} [reportInvalidScopeDisables]
 * @property {boolean} [reportDescriptionlessDisables]
 * @property {number} [maxWarnings]
 * @property {boolean} quiet
 * @property {string} [syntax]
 * @property {string} [version]
 * @property {boolean} [allowEmptyInput]
 */

/**
 * @typedef {object} CLIOptions
 * @property {any} input
 * @property {any} help
 * @property {any} pkg
 * @property {Function} showHelp
 * @property {Function} showVersion
 * @property {CLIFlags} flags
 */

/**
 * @typedef {object} OptionBaseType
 * @property {any} formatter
 * @property {boolean} [cache]
 * @property {string} [configFile]
 * @property {string} [cacheLocation]
 * @property {string} [customSyntax]
 * @property {string} [codeFilename]
 * @property {string} [configBasedir]
 * @property {boolean} [quiet]
 * @property {any} [printConfig]
 * @property {boolean} [fix]
 * @property {boolean} [ignoreDisables]
 * @property {any} [ignorePath]
 * @property {string} [outputFile]
 * @property {boolean} [reportNeedlessDisables]
 * @property {boolean} [reportInvalidScopeDisables]
 * @property {boolean} [reportDescriptionlessDisables]
 * @property {boolean} [disableDefaultIgnores]
 * @property {number} [maxWarnings]
 * @property {string} [syntax]
 * @property {string[]} [ignorePattern]
 * @property {boolean} [allowEmptyInput]
 * @property {string} [files]
 * @property {string} [code]
 */

const meowOptions = {
	autoHelp: false,
	autoVersion: false,
	help: `
    Usage: stylelint [input] [options]

    Input: Files(s), glob(s), or nothing to use stdin.

      If an input argument is wrapped in quotation marks, it will be passed to
      globby for cross-platform glob support. node_modules are always ignored.
      You can also pass no input and use stdin, instead.

    Options:

      --config

        Path to a specific configuration file (JSON, YAML, or CommonJS), or the
        name of a module in node_modules that points to one. If no --config
        argument is provided, stylelint will search for configuration files in
        the following places, in this order:
          - a stylelint property in package.json
          - a .stylelintrc file (with or without filename extension:
            .json, .yaml, .yml, and .js are available)
          - a stylelint.config.js file exporting a JS object
        The search will begin in the working directory and move up the directory
        tree until a configuration file is found.

      --config-basedir

        An absolute path to the directory that relative paths defining "extends"
        and "plugins" are *relative to*. Only necessary if these values are
        relative paths.

      --print-config

        Print the configuration for the given path.

      --ignore-path, -i

        Path to a file containing patterns that describe files to ignore. The
        path can be absolute or relative to process.cwd(). You can repeat the
        option to provide multiple paths. By default, Stylelint looks for
        .stylelintignore in process.cwd().

      --ignore-pattern, --ip

        Pattern of files to ignore (in addition to those in .stylelintignore)

      --fix

        Automatically fix problems of certain rules.

      --custom-syntax

        Module name or path to a JS file exporting a PostCSS-compatible syntax.

      --stdin

        Accept stdin input even if it is empty.

      --stdin-filename

        A filename to assign stdin input.

      --ignore-disables, --id

        Ignore stylelint-disable comments.

      --disable-default-ignores, --di

        Allow linting of node_modules.

      --cache                       [default: false]

        Store the info about processed files in order to only operate on the
        changed ones the next time you run stylelint. By default, the cache
        is stored in "./.stylelintcache". To adjust this, use --cache-location.

      --cache-location              [default: '.stylelintcache']

        Path to a file or directory to be used for the cache location.
        Default is "./.stylelintcache". If a directory is specified, a cache
        file will be created inside the specified folder, with a name derived
        from a hash of the current working directory.

        If the directory for the cache does not exist, make sure you add a trailing "/"
        on *nix systems or "\\" on Windows. Otherwise the path will be assumed to be a file.

      --formatter, -f               [default: "string"]

        The output formatter: ${getFormatterOptionsText({ useOr: true })}.

      --custom-formatter

        Path to a JS file exporting a custom formatting function.
        The file can either be a filesystem path, a module name, or a file to load from a dependency.

      --quiet, -q

        Only register problems for rules with an "error"-level severity (ignore
        "warning"-level).

      --color
      --no-color

        Force enabling/disabling of color.

      --report-needless-disables, --rd

        Also report errors for stylelint-disable comments that are not blocking a lint warning.
        The process will exit with code ${EXIT_CODE_ERROR} if needless disables are found.

      --report-invalid-scope-disables, --risd

        Report stylelint-disable comments that used for rules that don't exist within the configuration object.
        The process will exit with code ${EXIT_CODE_ERROR} if invalid scope disables are found.

      --report-descriptionless-disables, --rdd

        Report stylelint-disable comments without a description.
        The process will exit with code ${EXIT_CODE_ERROR} if descriptionless disables are found.

      --max-warnings, --mw

        Number of warnings above which the process will exit with code ${EXIT_CODE_ERROR}.
        Useful when setting "defaultSeverity" to "warning" and expecting the
        process to fail on warnings (e.g. CI build).

      --output-file, -o

        Path of file to write report.

      --version, -v

        Show the currently installed version of stylelint.

      --allow-empty-input, --aei

        When glob pattern matches no files, the process will exit without throwing an error.
	`,
	flags: {
		allowEmptyInput: {
			alias: 'aei',
			type: 'boolean',
		},
		cache: {
			type: 'boolean',
		},
		cacheLocation: {
			type: 'string',
		},
		color: {
			type: 'boolean',
		},
		config: {
			type: 'string',
		},
		configBasedir: {
			type: 'string',
		},
		customFormatter: {
			type: 'string',
		},
		customSyntax: {
			type: 'string',
		},
		disableDefaultIgnores: {
			alias: 'di',
			type: 'boolean',
		},
		fix: {
			type: 'boolean',
		},
		formatter: {
			alias: 'f',
			default: 'string',
			type: 'string',
		},
		help: {
			alias: 'h',
			type: 'boolean',
		},
		ignoreDisables: {
			alias: 'id',
			type: 'boolean',
		},
		ignorePath: {
			alias: 'i',
			type: 'string',
			isMultiple: true,
		},
		ignorePattern: {
			alias: 'ip',
			type: 'string',
			isMultiple: true,
		},
		maxWarnings: {
			alias: 'mw',
			type: 'number',
		},
		outputFile: {
			alias: 'o',
			type: 'string',
		},
		printConfig: {
			type: 'boolean',
		},
		quiet: {
			alias: 'q',
			type: 'boolean',
		},
		reportDescriptionlessDisables: {
			alias: 'rdd',
			type: 'boolean',
		},
		reportInvalidScopeDisables: {
			alias: 'risd',
			type: 'boolean',
		},
		reportNeedlessDisables: {
			alias: 'rd',
			type: 'boolean',
		},
		stdin: {
			type: 'boolean',
		},
		stdinFilename: {
			type: 'string',
		},
		syntax: {
			alias: 's',
			type: 'string',
		},
		version: {
			alias: 'v',
			type: 'boolean',
		},
	},
};

/**
 * @param {string[]} argv
 * @returns {Promise<any>}
 */
module.exports = async (argv) => {
	const cli = buildCLI(argv);

	const invalidOptionsMessage = checkInvalidCLIOptions(meowOptions.flags, cli.flags);

	if (invalidOptionsMessage) {
		process.stderr.write(invalidOptionsMessage);
		process.exit(EXIT_CODE_ERROR); // eslint-disable-line no-process-exit
	}

	let formatter = cli.flags.formatter;

	if (cli.flags.customFormatter) {
		const customFormatter = resolveCustomFormatter(cli.flags.customFormatter);

		formatter = require(customFormatter);
	}

	/** @type {OptionBaseType} */
	const optionsBase = {
		formatter,
	};

	if (cli.flags.quiet) {
		optionsBase.quiet = cli.flags.quiet;
	}

	if (cli.flags.syntax) {
		optionsBase.syntax = cli.flags.syntax;
	}

	if (cli.flags.customSyntax) {
		optionsBase.customSyntax = getModulePath(process.cwd(), cli.flags.customSyntax);
	}

	if (cli.flags.config) {
		// Should check these possibilities:
		//   a. name of a node_module
		//   b. absolute path
		//   c. relative path relative to `process.cwd()`.
		// If none of the above work, we'll try a relative path starting
		// in `process.cwd()`.
		optionsBase.configFile =
			resolveFrom.silent(process.cwd(), cli.flags.config) ||
			path.join(process.cwd(), cli.flags.config);
	}

	if (cli.flags.configBasedir) {
		optionsBase.configBasedir = path.isAbsolute(cli.flags.configBasedir)
			? cli.flags.configBasedir
			: path.resolve(process.cwd(), cli.flags.configBasedir);
	}

	if (cli.flags.stdinFilename) {
		optionsBase.codeFilename = cli.flags.stdinFilename;
	}

	if (cli.flags.ignorePath) {
		optionsBase.ignorePath = cli.flags.ignorePath;
	}

	if (cli.flags.ignorePattern) {
		optionsBase.ignorePattern = cli.flags.ignorePattern;
	}

	if (cli.flags.ignoreDisables) {
		optionsBase.ignoreDisables = cli.flags.ignoreDisables;
	}

	if (cli.flags.disableDefaultIgnores) {
		optionsBase.disableDefaultIgnores = cli.flags.disableDefaultIgnores;
	}

	if (cli.flags.cache) {
		optionsBase.cache = true;
	}

	if (cli.flags.cacheLocation) {
		optionsBase.cacheLocation = cli.flags.cacheLocation;
	}

	if (cli.flags.fix) {
		optionsBase.fix = cli.flags.fix;
	}

	if (cli.flags.outputFile) {
		optionsBase.outputFile = cli.flags.outputFile;
	}

	const reportNeedlessDisables = cli.flags.reportNeedlessDisables;
	const reportInvalidScopeDisables = cli.flags.reportInvalidScopeDisables;
	const reportDescriptionlessDisables = cli.flags.reportDescriptionlessDisables;

	if (reportNeedlessDisables) {
		optionsBase.reportNeedlessDisables = reportNeedlessDisables;
	}

	if (reportInvalidScopeDisables) {
		optionsBase.reportInvalidScopeDisables = reportInvalidScopeDisables;
	}

	if (reportDescriptionlessDisables) {
		optionsBase.reportDescriptionlessDisables = reportDescriptionlessDisables;
	}

	const maxWarnings = cli.flags.maxWarnings;

	if (maxWarnings !== undefined) {
		optionsBase.maxWarnings = maxWarnings;
	}

	if (cli.flags.help) {
		cli.showHelp(0);

		return;
	}

	if (cli.flags.version) {
		cli.showVersion();

		return;
	}

	if (cli.flags.allowEmptyInput) {
		optionsBase.allowEmptyInput = cli.flags.allowEmptyInput;
	}

	// Add input/code into options
	/** @type {OptionBaseType} */
	const options = cli.input.length
		? {
				...optionsBase,
				files: /** @type {string} */ (cli.input),
		  }
		: await getStdin().then((stdin) => {
				return {
					...optionsBase,
					code: stdin,
				};
		  });

	if (cli.flags.printConfig) {
		return printConfig(options)
			.then((config) => {
				process.stdout.write(JSON.stringify(config, null, '  '));
			})
			.catch(handleError);
	}

	if (!options.files && !options.code && !cli.flags.stdin) {
		cli.showHelp(0);

		return;
	}

	return standalone(options)
		.then((linted) => {
			if (!linted.output) {
				return;
			}

			process.stdout.write(linted.output);

			if (options.outputFile) {
				writeOutputFile(linted.output, options.outputFile).catch(handleError);
			}

			if (linted.errored) {
				process.exitCode = EXIT_CODE_ERROR;
			} else if (maxWarnings !== undefined && linted.maxWarningsExceeded) {
				const foundWarnings = linted.maxWarningsExceeded.foundWarnings;

				process.stderr.write(
					`${EOL}${red(`Max warnings exceeded: `)}${foundWarnings} found. ${dim(
						`${maxWarnings} allowed${EOL}${EOL}`,
					)}`,
				);
				process.exitCode = EXIT_CODE_ERROR;
			}
		})
		.catch(handleError);
};

/**
 * @param {{ stack: any, code: any }} err
 * @returns {void}
 */
function handleError(err) {
	process.stderr.write(err.stack + EOL);
	const exitCode = typeof err.code === 'number' ? err.code : 1;

	process.exitCode = exitCode;
}

/**
 * @param {string[]} argv
 * @returns {CLIOptions}
 */
function buildCLI(argv) {
	// @ts-expect-error -- TS2322: Type 'Result<AnyFlags>' is not assignable to type 'CLIOptions'.
	return meow({ ...meowOptions, argv });
}

module.exports.buildCLI = buildCLI;