itslab-kyushu/youtube-comment-scraper

#! /usr/bin/env node

//
// cli.js
//
// Copyright (c) 2016-2017 Junpei Kawamoto
//
// This software is released under the MIT License.
//
// http://opensource.org/licenses/mit-license.php
//
const {
    channel,
    comments,
    close
} = require("../lib/scraper");

const argv = require("yargs")
    .usage("Usage: $0 url")
    .option("channel", {
        boolean: true,
        description: "If set, scrape channel infomration."
    })
    .demandCommand(1)
    .version()
    .help("h")
    .alias("h", "help")
    .argv;

const url = argv._[0];
if (argv.channel) {
    console.warn(`Getting comments from channel ${url}`);
    channel(url).then((res) => {
        console.log(JSON.stringify(res));
        close();
    }).catch((err) => {
        console.error(err);
        close();
    })
} else {
    console.warn(`Getting comments from video ${url}`);
    comments(url).then((res) => {
        console.log(JSON.stringify(res));
        close();
    }).catch((err) => {
        console.error(err);
        close();
    });
}