jq - a simple cli for JSON querying

jq.js

process.stdin.setEncoding('utf8');

var what = process.argv[2] || '';

process.stdin.on('readable', function () {
  var chunk = process.stdin.read();

  if (chunk) {
    var obj = JSON.parse(chunk);

    switch(what) {
      case '.':
        return console.log(obj);

      case '':
        return console.log('nothing to do');

      default:
        var split = what.split('.').filter(function (s) { return !!s; });
        return console.log(
          split.reduce(function (obj, next) {
            return obj == undefined ? undefined: obj[next];
          }, obj)
        );
    }
  }
});

process.stdin.on('end', function () {
  process.stdout.write('dooooooooone\n');
});