cli.js

#!/usr/bin/env node
'use strict';
console.log("Env", process.env)
const updateNotifier = require('update-notifier');
const subarg = require('subarg');
const sudoBlock = require('sudo-block');
const logSymbols = require('log-symbols');
const arrayUniq = require('array-uniq');
const arrayDiffer = require('array-differ');
const arrify = require('arrify');
const Pageres = require('pageres');
const parseHeaders = require('parse-headers');
const meow = require('meow');

const options = {
	boolean: [
		'verbose',
		'crop',
		'overwrite',
		'darkMode'
	],
	default: {
		delay: 0,
		scale: 1
	},
	alias: {
		v: 'verbose',
		c: 'crop',
		d: 'delay'
	}
};

const cli = meow(`
	Specify urls and screen resolutions as arguments. Order doesn't matter.
	Group arguments with [ ]. Options defined inside a group will override the outer ones.
	Screenshots are saved in the current directory.

	Usage
	  $ pageres <url> <resolution>
	  $ pageres [ <url> <resolution> ] [ <url> <resolution> ]

	Examples
	  $ pageres https://sindresorhus.com https://example.com 1366x768 1600x900
	  $ pageres https://sindresorhus.com https://example.com 1366x768 1600x900 --overwrite
	  $ pageres [ https://example.com 1366x768 1600x900 --no-crop ] [ https://sindresorhus.com 1024x768 480x320 ] --crop
	  $ pageres https://sindresorhus.com 1024x768 --filename='<%= date %> - <%= url %>'
	  $ pageres https://example.com 1366x768 --selector='.page-header'
	  $ pageres unicorn.html 1366x768

	Options
	  --verbose, -v            Verbose output
	  --crop, -c               Crop to the set height
	  --delay=<seconds>, -d    Delay screenshot capture
	  --filename=<template>    Custom filename
	  --overwrite              Overwrite file if it exists
	  --selector=<element>     Capture DOM element
	  --hide=<element>         Hide DOM element (Can be set multiple times)
	  --cookie=<cookie>        Browser cookie (Can be set multiple times)
	  --header=<string>        Custom HTTP request header (Can be set multiple times)
	  --username=<username>    Username for HTTP auth
	  --password=<password>    Password for HTTP auth
	  --scale=<number>         Scale webpage
	  --format=<string>        Image format
	  --css=<string>           Apply custom CSS
	  --darkMode               Emulate preference of dark color scheme

	<url> can also be a local file path
`, options);

async function generate(args, options) {
	const pageres = new Pageres({
		incrementalName: !options.overwrite,
                launchOptions: { executablePath: process.env['PUPPETEER_EXECUTABLE_PATH'] },
	}).dest(process.cwd());

	for (const argument of args) {
		pageres.src(argument.url, argument.sizes, argument.options);
	}

	await pageres.run();
	pageres.successMessage();
}

function get(args) {
	const returnValue = [];

	for (const argument of args) {
		if (argument.url.length === 0) {
			console.error(logSymbols.warning, 'Specify a url');
			process.exit(1);
		}

		if (argument.sizes.length === 0 && argument.keywords.length === 0) {
			argument.sizes = ['1366x768'];
		}

		if (argument.keywords.length > 0) {
			argument.sizes = argument.sizes.concat(argument.keywords);
		}

		for (const url of argument.url) {
			returnValue.push({
				url,
				sizes: argument.sizes,
				options: argument.options
			});
		}
	}

	return returnValue;
}

function parse(args, globalOptions) {
	const filename = arrify(globalOptions.filename);
	delete globalOptions.filename;

	return args.map((arg, index) => {
		const options = {...globalOptions, ...arg};

		arg = arg._;
		delete options._;

		if (options.cookie) {
			options.cookie = arrify(options.cookie);
		}

		if (options.header) {
			options.header = parseHeaders(arrify(options.header).join('\n'));
		}

		if (filename[index]) {
			options.filename = filename[index];
		}

		// Plural makes more sense for programmatic options
		options.cookies = options.cookie;
		options.headers = options.header;
		delete options.cookie;
		delete options.header;

		if (options.hide) {
			options.hide = arrify(options.hide);
		}

		const urlRegex = /https?:\/\/|localhost|\./;
		const sizeRegex = /^\d{3,4}x\d{3,4}$/i;
		const url = arrayUniq(arg.filter(x => urlRegex.test(x)));
		const sizes = arrayUniq(arg.filter(x => sizeRegex.test(x)));
		const keywords = arrayDiffer(arg, url.concat(sizes));

		return {
			url,
			sizes,
			keywords,
			options
		};
	});
}

async function init(args, options) {
	if (args.length === 0) {
		cli.showHelp(1);
	}

	const nonGroupedArgs = args.filter(x => !x._);

	// Filter grouped args
	args = args.filter(x => x._);

	if (nonGroupedArgs.length > 0) {
		args.push({_: nonGroupedArgs});
	}

	const parsedArgs = parse(args, options);
	const items = get(parsedArgs);

	await generate(items, options);
}

sudoBlock();
updateNotifier({pkg: cli.pkg}).notify();

init(subarg(cli.input, options)._, cli.flags).catch(error => {
	console.error(error);
	process.exit(1);
});