From e69eef70c1ecd307af7df62e377353b9fefff0ba Mon Sep 17 00:00:00 2001
From: Dinesh Subhraveti <dineshs@altiscale.com>
Date: Thu, 19 Dec 2013 21:41:22 -0800
Subject: [PATCH] Add -S option to tar for efficient sparse file handling

Fixes issue #3282
Upstream-commit: 733bf5d3ddbfb6dba7c2c0996c4af47a765e4593
Component: engine
---
 components/engine/AUTHORS            | 1 +
 components/engine/archive/archive.go | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/components/engine/AUTHORS b/components/engine/AUTHORS
index 60533c1cc2..2476208d13 100644
--- a/components/engine/AUTHORS
+++ b/components/engine/AUTHORS
@@ -47,6 +47,7 @@ Daniel YC Lin <dlin.tw@gmail.com>
 Darren Coxall <darren@darrencoxall.com>
 David Calavera <david.calavera@gmail.com>
 David Sissitka <me@dsissitka.com>
+Dinesh Subhraveti <dineshs@altiscale.com>
 Deni Bertovic <deni@kset.org>
 Dominik Honnef <dominik@honnef.co>
 Don Spaulding <donspauldingii@gmail.com>
diff --git a/components/engine/archive/archive.go b/components/engine/archive/archive.go
index ae2c030cb7..f8fcf0b163 100644
--- a/components/engine/archive/archive.go
+++ b/components/engine/archive/archive.go
@@ -149,7 +149,7 @@ func escapeName(name string) string {
 // Tar creates an archive from the directory at `path`, only including files whose relative
 // paths are included in `filter`. If `filter` is nil, then all files are included.
 func TarFilter(path string, options *TarOptions) (io.Reader, error) {
-	args := []string{"tar", "--numeric-owner", "-f", "-", "-C", path, "-T", "-"}
+	args := []string{"tar", "-S", "--numeric-owner", "-f", "-", "-C", path, "-T", "-"}
 	if options.Includes == nil {
 		options.Includes = []string{"."}
 	}
@@ -228,7 +228,7 @@ func Untar(archive io.Reader, path string, options *TarOptions) error {
 	compression := DetectCompression(buf)
 
 	utils.Debugf("Archive compression detected: %s", compression.Extension())
-	args := []string{"--numeric-owner", "-f", "-", "-C", path, "-x" + compression.Flag()}
+	args := []string{"-S", "--numeric-owner", "-f", "-", "-C", path, "-x" + compression.Flag()}
 
 	if options != nil {
 		for _, exclude := range options.Excludes {