From c4b31783eec7a92198abfd476363af6ddc7c4148 Mon Sep 17 00:00:00 2001
From: Gunnar Wolf <gwolf@gwolf.org>
Date: Tue, 14 Apr 2020 22:27:20 -0500
Subject: [PATCH] Add xzimages target; build shasums based on them instead

---
 Makefile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 827ccbd..8932e18 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,7 @@
 all: shasums
 
 shasums: raspi_0w.sha256 raspi_2.sha256 raspi_3.sha256
+xzimages: raspi_0w.img.xz raspi_2.img.xz raspi_3.img.xz
 images: raspi_0w.img raspi_2.img raspi_3.img
 yaml: raspi_0w.yaml raspi_2.yaml raspi_3.yaml
 
@@ -28,8 +29,11 @@ raspi_3.yaml: raspi_master.yaml
 	sed "s/__SPU_ENABLE__//" |\
 	sed "s/__HOST__/rpi3/" > $@
 
-%.sha256: %.img
-	sha256sum $(@:sha256=img) > $@
+%.sha256: %.img.xz
+	sha256sum $(@:sha256=img.xz) > $@
+
+%.img.xz: %.img
+	xz -f -z -9 $(@:.xz=)
 
 %.img: %.yaml
 	touch $(@:.img=.log)