added --version flag

bin/db-migrate

@@ -45,11 +45,20 @@ var argv = optimist
     .alias('h', '?')
     .boolean('h')
 
+    .describe('version', 'Print version info.')
+    .alias('i', 'version')
+    .boolean('version')
+
     .describe('config', 'Location of the database.json file.')
     .string('config')
 
     .argv;
 
+if (argv.version) {
+  console.log(index.version);
+  process.exit(0);
+}
+
 if (argv.help || argv._.length == 0) {
   optimist.showHelp();
   process.exit(1);

index.js

@@ -18,3 +18,6 @@ exports.createMigration = function(title, migrationsDir, callback) {
     callback(null, migration);
   });
 };
+
+// Must be manually synced with that of package.json.
+exports.version = '0.3.2';