Changed prompt lib, updated cli's

- fixes #252

bin/commander.js

@@ -0,0 +1,46 @@
+const pkg = require('../package.json');
+const dotenv = require('dotenv');
+const fs = require('fs');
+const program = require('commander');
+const util = require('../util');
+
+// Perform rewrites to the runtime environment variables based on the contents
+// of the process.env.REWRITE_ENV if it exists. This is done here as it is the
+// entrypoint for the entire application.
+require('env-rewrite').rewrite();
+
+//==============================================================================
+// Setting up the program command line arguments.
+//==============================================================================
+
+const parseArgs = require('minimist')(process.argv.slice(2), {
+  alias: {
+    'c': 'config'
+  },
+  string: [
+    'config',
+    'pid'
+  ],
+  default: {
+    'config': null,
+    'pid': null
+  }
+});
+
+if (parseArgs.config) {
+  let envConfig = dotenv.parse(fs.readFileSync(parseArgs.config, {encoding: 'utf8'}));
+
+  Object.keys(envConfig).forEach((k) => {
+    process.env[k] = envConfig[k];
+  });
+}
+
+// If the `--pid` flag is used, put the current pid there.
+if (parseArgs.pid) {
+  util.pid(parseArgs.pid);
+}
+
+module.exports = program
+  .version(pkg.version)
+  .option('-c, --config [path]', 'Specify the configuration file to load')
+  .option('--pid [path]', 'Specify a path to output the current PID to');