From d772e46667bb79a22205a7f6533b11e37630e1ef Mon Sep 17 00:00:00 2001
From: Malte Poll <mp@edgeless.systems>
Date: Wed, 23 Mar 2022 11:23:10 +0100
Subject: [PATCH] Use parallel gzip implementation (pigz) to repack GCP image
 after recalculating dm-verity hashtree (#1)

---
 images/fcos/dm-verity/recalculate-dm-verity.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/images/fcos/dm-verity/recalculate-dm-verity.sh b/images/fcos/dm-verity/recalculate-dm-verity.sh
index 48cf60294..eee1fb44b 100755
--- a/images/fcos/dm-verity/recalculate-dm-verity.sh
+++ b/images/fcos/dm-verity/recalculate-dm-verity.sh
@@ -163,7 +163,7 @@ repack () {
 
     gcp)
         echo "📥 Repacking GCP image..."
-        tar --owner=0 --group=0 -C "${unpacked_image_dir}" -Sch --format=oldgnu -f "${tmp_tar_file}" "${unpacked_image_filename}"
+        tar --use-compress-program=pigz --owner=0 --group=0 -C "${unpacked_image_dir}" -Sch --format=oldgnu -f "${tmp_tar_file}" "${unpacked_image_filename}"
         "${PV}" "${tmp_tar_file}" | gzip -9c  > "${packed_image}"
         rm "${tmp_tar_file}"
         echo "  Repacked image stored in ${packed_image}"