analyze-css/bin/analyze-css.js

#!/usr/bin/env node

/**
 * analyze-css entry point
 *
 * @see https://github.com/macbre/analyze-css
 */
'use strict';

const { program } = require('commander');

var analyzer = require('./../lib/index'),
	debug = require('debug')('analyze-css:bin'),
	runner = require('./../lib/runner'),
	runnerOpts = {};

// parse options
program
	.version(analyzer.version)
	.usage('--url <url> [options]')
	// https://www.npmjs.com/package/commander#common-option-types-boolean-and-value
	.option('--url <url>', 'Set URL of CSS to analyze')
	.option('--file <file>', 'Set local CSS file to analyze')
	.option('--ignore-ssl-errors', 'Ignores SSL errors, such as expired or self-signed certificate errors')
	.option('-p, --pretty', 'Causes JSON with the results to be pretty-printed')
	.option('-N, --no-offenders', 'Show only the metrics without the offenders part')
	.option('--auth-user <user>', 'Sets the user name used for HTTP authentication')
	.option('--auth-pass <pass>', 'Sets the password used for HTTP authentication')
	.option('-x, --proxy <proxy>', 'Sets the HTTP proxy');

// parse it
program.parse(process.argv);

debug('analyze-css v%s', analyzer.version);

// support stdin (issue #28)
if (process.argv.indexOf('-') > -1) {
	runnerOpts.stdin = true;
}
// --url
else if (program.url) {
	runnerOpts.url = program.url;
}
// --file
else if (program.file) {
	runnerOpts.file = program.file;
}
// either --url or --file or - (stdin) needs to be provided
else {
	console.log(program.helpInformation());
	process.exit(analyzer.EXIT_NEED_OPTIONS);
}

runnerOpts.ignoreSslErrors = program['ignore-ssl-errors'];
runnerOpts.noOffenders = program.offenders === false;
runnerOpts.authUser = program['auth-user'];
runnerOpts.authPass = program['auth-pass'];
runnerOpts.proxy = program.proxy;

debug('opts: %j', runnerOpts);

// run the analyzer
runner(runnerOpts, function(err, res) {
	var output, exitCode;

	// emit an error and die
	if (err) {
		exitCode = err.code || 1;
		debug('Exiting with exit code #%d', exitCode);

		console.error(err.toString());
		process.exit(exitCode);
	}

	// make offenders flat (and append position if possible - issue #25)
	if (typeof res.offenders !== 'undefined') {
		Object.keys(res.offenders).forEach(function(metricName) {
			res.offenders[metricName] = res.offenders[metricName].map(function(offender) {
				var position = offender.position && offender.position.start;
				return offender.message + (position ? ' @ ' + position.line + ':' + position.column : '');
			});
		});
	}

	// format the results
	if (program.pretty === true) {
		output = JSON.stringify(res, null, '  ');
	} else {
		output = JSON.stringify(res);
	}

	process.stdout.write(output);
});