From 798732dd45768ad46a60d894c5bf6d78bb3efddf Mon Sep 17 00:00:00 2001
From: Josh Humphries <jh@fullstory.com>
Date: Thu, 8 Mar 2018 10:34:04 -0500
Subject: [PATCH] relax some argument issues to warnings

---
 cmd/grpcurl/grpcurl.go | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/cmd/grpcurl/grpcurl.go b/cmd/grpcurl/grpcurl.go
index 8656506..e07cb62 100644
--- a/cmd/grpcurl/grpcurl.go
+++ b/cmd/grpcurl/grpcurl.go
@@ -169,10 +169,10 @@ func main() {
 		args = args[1:]
 	} else {
 		if *data != "" {
-			fail(nil, "The -d argument is not used with 'list' or 'describe' verb.")
+			warn("The -d argument is not used with 'list' or 'describe' verb.")
 		}
 		if len(rpcHeaders) > 0 {
-			fail(nil, "The -rpc-header argument is not used with 'list' or 'describe' verb.")
+			warn("The -rpc-header argument is not used with 'list' or 'describe' verb.")
 		}
 		if len(args) > 0 {
 			symbol = args[0]
@@ -190,7 +190,7 @@ func main() {
 		fail(nil, "No host:port specified and no protoset specified.")
 	}
 	if len(protoset) > 0 && len(reflHeaders) > 0 {
-		fail(nil, "The -reflect-header argument is not used when -protoset files are used ")
+		warn("The -reflect-header argument is not used when -protoset files are used ")
 	}
 
 	ctx := context.Background()
@@ -419,6 +419,11 @@ the method's request type will be sent.
 
 }
 
+func warn(msg string, args ...interface{}) {
+	msg = fmt.Sprintf("Warning: %s\n", msg)
+	fmt.Fprintf(os.Stderr, msg, args...)
+}
+
 func fail(err error, msg string, args ...interface{}) {
 	if err != nil {
 		msg += ": %v"