Deno CLI to download JSON links to directory

download.js

import { download, Destination } from 'https://deno.land/x/download/mod.ts'

function error(msg) {
  console.error(msg)
  Deno.exit(1)
}
/**
 * @param file The JSON file path
 * @param path The JSON object path
 * @param dest The download destination dir (optional, defaults to current)
 */

const {
  args: [file, path, dest = './'],
} = Deno

if (!file) error('No file specified')
if (!path) error('No JSON path specified')

const json = Deno.readTextFile(file)

json.then(async (res) => {
  try {
    let data = JSON.parse(res)
    let links = data[path]
    if (!links) error('JSON path does not exist')
    // NOTE : You need to ensure that the directory you pass exists.
    const destination: Destination = {
      dir: dest,
    }
    let downloads = links.map((url: string) => download(url, destination))
    await Promise.all(downloads)
    console.log('Done.')
  } catch (err) {
    error(err)
  }
})