Hypercubed/autocmdr

/* commander/autocmdr component
 * Adds config command to commander.js program.
 * To use add require('autocmdr/lib/config.js')(program) where program is a commander or autocmdr program.
 */
var path = require('path');

module.exports = function (program, opts) {
  'use strict';

  opts = opts || {};
  opts.name = opts.name || program._name || path.basename(process.mainModule.filename);
  opts.path = opts.path || path.join(process.mainModule.filename, '../../.' + opts.name);

  var nconf = require('nconf');

  program.log.debug('Loading config from ', opts.path);

  nconf.file({ 'file': opts.path }).load();

  function _config (key, value) {
    if (key && value !== null) {
      if (value === '') {
        program.log.debug('Clearing key', key);
        nconf.clear(key);
      } else {
        program.log.debug('Setting key', key, 'to', value);
        nconf.set(key, value);
      }
      nconf.save();
      console.log(nconf.save());
    } else if (key) {
      program.log.debug('Retrieving key', key);
      console.log(nconf.get(key));
    } else {
      program.log.debug('Listing all kay-values');
      console.log(nconf.load());
    }
  }

  program
    .command('config [key] [value]')
    .description('Get and set options')
    .action(_config);

  program.config = nconf;
};