goomba.js

goomba.js

#!/usr/bin/env node

function big (str) {
 return Array.from(str, letter => letter == ' '  ?  ':blank:'  :  ':b' + letter + ':').join('')
}

function goomba(str) {
 const goomba = ':goomba:';
 return goomba.repeat(str.length+2) + '\n' + goomba + big(str) + goomba + '\n' + goomba.repeat(str.length+2);
}

console.log(goomba(process.argv.slice(2).join(" ")))

package.json

{
  "name": "goomba",
  "bin": "./goomba.js",
  "version": "0.0.0-0.0.0"
}