1 files changed, 26 insertions, 0 deletions
diff --git a/build-es/asyncify.js b/build-es/asyncify.js
new file mode 100644
index 0000000..9239e99
--- /dev/null
+++ b/build-es/asyncify.js
@@ -0,0 +1,26 @@
+'use strict';
+
+import isObject from 'lodash-es/isObject';
+import rest from 'lodash-es/rest';
+
+export default function asyncify(func) {
+    return rest(function (args) {
+        var callback = args.pop();
+        var result;
+        try {
+            result = func.apply(this, args);
+        } catch (e) {
+            return callback(e);
+        }
+        // if result is Promise object
+        if (isObject(result) && typeof result.then === 'function') {
+            result.then(function(value) {
+                callback(null, value);
+            })['catch'](function(err) {
+                callback(err.message ? err : new Error(err));
+            });
+        } else {
+            callback(null, result);
+        }
+    });
+}