Simplify, just load configuration from a config.json.

.gitignore

+.DS_Store
 node_modules
+config.json

cli.js

 #!/usr/bin/env node
 
+'use strict';
+
 var Lock = require('./lib/lock');
 var noble = require('noble');
 
@@ -7,7 +9,6 @@ var argv = require('yargs')
   .usage('Control an August Smart Lock.\nUsage: $0 [command]')
   .example('$0 lock', 'closes the lock')
   .example('$0 unlock', 'opens the lock')
-  .describe('config', 'configuration file (default is $HOME/.config/augustctl.json)')
   .check(function(argv) {
     if (argv._.length !== 1) {
       return 'must specify an operation to perform';
@@ -20,7 +21,7 @@ var argv = require('yargs')
   })
   .argv;
 
-var config = require('./config')(argv.config);
+var config = require(process.env.AUGUSTCTL_CONFIG || './config.json');
 
 noble.on('stateChange', function(state) {
   if (state === 'poweredOn') {

config.js

-var fs = require('fs');
-
-function loadConfig(filename) {
-  if (!filename) {
-    var configDir = process.env.XDG_CONFIG_HOME || (process.env.HOME + '/.config');
-    filename = configDir + '/augustctl.json';
-  }
-
-  var config = JSON.parse(fs.readFileSync(filename));
-  if (!config.offlineKey || !config.offlineKeyOffset) {
-    throw new Error("config file must specify offlineKey and offlineKeyOffset");
-  }
-
-  return config;
-}
-
-module.exports = loadConfig;

tools/decode_capture.js

@@ -73,5 +73,5 @@ function decodeLog(offlineKey, filename) {
   });
 }
 
-var config = require('../config')();
+var config = require(process.env.AUGUSTCTL_CONFIG || '../config.json');
 decodeLog(config.offlineKey, process.argv[2]);