CLI tool for getting values from JSON text files.

jsonv

#!/usr/bin/env node
const fs = require('fs');

var args = process.argv.slice(2);

if (args.length < 2) {
  console.log('Usage: jsonv <jsonfile> <json-path-1> ... <json-path-n>');
  process.exit(1);
}

var data = JSON.parse(fs.readFileSync(args.shift())),
    root = null,
    segs = null,
    leaf = null;

while (args.length) {

  root = data;
  segs = args.shift().split('.');

  for (var i = 0, n = segs.length; i < n; ++i) {
    if (false == segs[i] in root) {
      root = null;
      console.log('not found: ' + segs[i]);
      break;
    }
    root = root[segs[i]];
  }

  if (root != null) {
    console.log(root);
  }
}