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#!/usr/bin/env node

const fs = require('fs');

const obj = require('through2').obj;

const pager = require('default-pager');

const msee = require('msee');

const join = require('path').join;

const boxen = require('boxen');

const chalk = require('chalk');

const updateNotifier = require('update-notifier');

const pkg = require('./package.json');

const meow = require('meow');

const cli = meow([

'Usage',

' bash-handbook',

'',

'Options',

' --lang, -l Translation language',

'',

'Examples',

' bash-handbook',

' bash-handbook --lang pt-br'

], {

string: [

'lang'

],

alias: {

l: 'lang',

h: 'help'

},

default: {

lang: ''

}

});

const boxenOpts = {

borderColor: 'yellow',

margin: {

bottom: 1

},

padding: {

right: 1,

left: 1

}

};

const mseeOpts = {

paragraphEnd: '\n\n'

};

const notifier = updateNotifier({ pkg });

process.env.PAGER = process.env.PAGER || 'less';

process.env.LESS = process.env.LESS || 'FRX';

const lang = cli.flags.lang

.toLowerCase()

.split('-')

.map((l, i) => i === 0 ? l : l.toUpperCase())

.join('-');

const translation = join(__dirname, !lang ? './README.md' : `./README-${lang}.md`);

fs.stat(translation, function (err, stats) {

if (err) {

console.log('The %s translation does not exist', chalk.bold(lang));

return;

}

fs.createReadStream(translation)

.pipe(obj(function (chunk, enc, cb) {

const message = [];

if (notifier.update) {

message.push(`Update available: {green.bold ${notifier.update.latest}} {dim current: ${notifier.update.current}}`);

message.push(`Run {blue npm install -g ${pkg.name}} to update.`);

this.push(boxen(message.join('\n'), boxenOpts));

}

this.push(msee.parse(chunk.toString(), mseeOpts));

cb();

}))

.pipe(pager());

});