handlebars-macro.js

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

const argv = minimist(process.argv.slice(2));

console.assert(argv.t, '-t path/to/template.hbs is required');

const template = fs.readFileSync(argv.t, 'utf8');
const data = (argv.f ? [].concat(argv.f).map(f => fs.readFileSync(f, 'utf8')) : [].concat(argv._ || [])).reduce(
  (data, src) => Object.assign(data, hjson.parse(src)),
  {}
);

const output = argv.o ? fs.createWriteStream(argv.o) : process.stdout;

output.write(handlebars.compile(template)(data));