From cdea962127e82e99a103b18fbd6f0ee9db93569c Mon Sep 17 00:00:00 2001
From: Peter Edge <peter.edge@gmail.com>
Date: Sat, 17 Feb 2018 23:30:03 +0100
Subject: [PATCH] Add DescriptorSourceFromFileDescriptorSet (#4)

---
 grpcurl.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/grpcurl.go b/grpcurl.go
index 018f72b..1ec147d 100644
--- a/grpcurl.go
+++ b/grpcurl.go
@@ -72,7 +72,11 @@ func DescriptorSourceFromProtoSets(fileNames ...string) (DescriptorSource, error
 		}
 		files.File = append(files.File, fs.File...)
 	}
+	return DescriptorSourceFromFileDescriptorSet(files)
+}
 
+// DescriptorSourceFromFileDescriptorSet creates a DescriptorSource that is backed by the FileDescriptorSet.
+func DescriptorSourceFromFileDescriptorSet(files *descriptor.FileDescriptorSet) (DescriptorSource, error) {
 	unresolved := map[string]*descriptor.FileDescriptorProto{}
 	for _, fd := range files.File {
 		unresolved[fd.GetName()] = fd