From 3629344e6e1b1b5a259285fee384b6bc0d47b4f9 Mon Sep 17 00:00:00 2001
From: Derek McGowan <derek@mcgstyle.net>
Date: Tue, 31 Jul 2018 15:08:59 -0700
Subject: [PATCH] Ensure specifying an empty platform is treated as default

The default platform had previously been provided using the
empty string. This change ensures that the platforms
field is always filled in correctly and empty string is
properly interpreted.

Signed-off-by: Derek McGowan <derek@mcgstyle.net>
---
 client_opts.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/client_opts.go b/client_opts.go
index 56ec400c6..6e6198739 100644
--- a/client_opts.go
+++ b/client_opts.go
@@ -18,6 +18,7 @@ package containerd
 
 import (
 	"github.com/containerd/containerd/images"
+	"github.com/containerd/containerd/platforms"
 	"github.com/containerd/containerd/remotes"
 	"google.golang.org/grpc"
 )
@@ -76,6 +77,9 @@ type RemoteOpt func(*Client, *RemoteContext) error
 // WithPlatform allows the caller to specify a platform to retrieve
 // content for
 func WithPlatform(platform string) RemoteOpt {
+	if platform == "" {
+		platform = platforms.Default()
+	}
 	return func(_ *Client, c *RemoteContext) error {
 		for _, p := range c.Platforms {
 			if p == platform {