parse-json.js

#!/usr/bin/env node

const [ name, fn ] = process.argv.slice(2);

const d = [];
process.stdin
.on('data', d.push.bind(d))
.on('end', () => {
  let data = JSON.parse(d.join(''));
  if(name){
    if(name === '-e' && fn){
      data = eval(`(${fn})(data)`);
    }else{
      data = data[name];
    }
  }
  try{
    console.log(JSON.stringify(data, null, 2));
    process.exit(0);
  }catch(e){
    console.error(e);
    process.exit(-1);
  }
})