From 0e15abc25d53a1ea32cf7fd8055311c98e18f3ea Mon Sep 17 00:00:00 2001
From: unclejack <unclejacksons@gmail.com>
Date: Tue, 12 Aug 2014 19:20:59 +0300
Subject: [PATCH] pkg/ioutils: add WriteCloserWrapper

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Upstream-commit: 7b6f34057cee94bf22e4e58cd164731e6b0e8851
Component: engine
---
 components/engine/pkg/ioutils/writers.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/components/engine/pkg/ioutils/writers.go b/components/engine/pkg/ioutils/writers.go
index de7bd0259e..c0b3608fe6 100644
--- a/components/engine/pkg/ioutils/writers.go
+++ b/components/engine/pkg/ioutils/writers.go
@@ -21,3 +21,19 @@ func NopWriteCloser(w io.Writer) io.WriteCloser {
 type NopFlusher struct{}
 
 func (f *NopFlusher) Flush() {}
+
+type writeCloserWrapper struct {
+	io.Writer
+	closer func() error
+}
+
+func (r *writeCloserWrapper) Close() error {
+	return r.closer()
+}
+
+func NewWriteCloserWrapper(r io.Writer, closer func() error) io.WriteCloser {
+	return &writeCloserWrapper{
+		Writer: r,
+		closer: closer,
+	}
+}