Prettify json passed to stdio and output to stdout

pretty-json.js

#!/usr/bin/env node

// Stdin JSON prettifier
// Partially based on https://gist.github.com/kristopherjohnson/5065599

const {inspect} = require('util');
const {stdin, stdout} = process;

var input = '';

stdin.setEncoding('utf8');

stdin.on('data', chunk => {
    input += chunk;
});

stdin.on('end', () => {
    var data = JSON.parse(input);
    var output;
    if (process.env.COLOR) {
        output = inspect(data, {colors: true});
    } else {
        output = JSON.stringify(data, null, process.env.TAB_SIZE || 4);
    }

    stdout.write(output);
    stdout.write('\n');
});

// Start reading input
stdin.resume();