From 3e76c50ac86d1546c8e063c5511ad0e87db1593a Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Sat, 7 Dec 2019 03:27:12 +0100
Subject: [PATCH] allow nilfs2 for rootfs

---
 Makefile | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/Makefile b/Makefile
index 326d2b8..8da2961 100644
--- a/Makefile
+++ b/Makefile
@@ -43,6 +43,8 @@ deb	http://cdn.debian.net/debian ${release} main
 endef
 endif
 
+fstype := ext4
+
 ifdef disk
   VOLUME := ${disk}
   PBOOT := ${disk}1
@@ -139,7 +141,8 @@ else ifdef raspi
   deb	http://archive.raspberrypi.org/debian ${release} main
   endef
 
-  PACKAGES += firmware-brcm80211 libraspberrypi-bin libraspberrypi0 pi-bluetooth raspberrypi-bootloader raspberrypi-kernel
+  PACKAGES += firmware-brcm80211 libraspberrypi-bin libraspberrypi0 pi-bluetooth raspberrypi-bootloader raspberrypi-kernel initramfs-tools nilfs-tools
+  fstype := nilfs2
 
   _target: _umount _config
   
@@ -251,7 +254,7 @@ _copy: ${SYSROOT} ${CFGROOT}
 _config: ${CFGROOT}
 	ln -sf /dev/null "$${CFGROOT}/etc/systemd/network/99-default.link"
 	printf '\nsession	optional	pam_mkhomedir.so umask=0027\n' >>"$${CFGROOT}/etc/pam.d/common-session"
-	printf 'LABEL=FSROOT / ext4 auto,nofail,rw 0 0\nLABEL=BOOT /boot vfat auto,nofail,ro 0 0\n' \
+	printf 'LABEL=FSROOT / ${fstype} auto,nofail,rw 0 0\nLABEL=BOOT /boot vfat auto,nofail,ro 0 0\n' \
 		>"$${CFGROOT}/etc/fstab"
 	chroot "$${CFGROOT}" update-initramfs -u
 
@@ -296,9 +299,15 @@ _partition_gpt: ${VOLUME}
 
 _sparse: ${PBOOT} ${PROOT}
 
+ifdef raspi
+_format_root: ${PROOT}
+	-umount "$${CFGROOT}/boot" "$${CFGROOT}" "${PROOT}"
+	mkfs.nilfs2 -f -L FSROOT "$${PROOT}"
+else
 _format_root: ${PROOT}
 	-umount "$${CFGROOT}/boot" "$${CFGROOT}" "${PROOT}"
 	mkfs.ext4 -F -L FSROOT "$${PROOT}"
+endif
 
 _format_boot: ${PBOOT}
 	-umount "$${CFGROOT}/boot" "${PBOOT}"
@@ -342,7 +351,7 @@ _grub_efi64: ${CFGROOT}
 	grub-mkimage -p / -O x86_64-efi fat part_gpt normal linux all_video >"$${CFGROOT}/boot/EFI/BOOT/BOOTX64.EFI"
 
 ${CFGROOT}/boot/cmdline.txt: ${CFGROOT}
-	printf 'root=/dev/mmcblk0p2 rootfstype=ext4 fsck.repair=yes rootwait' >"$@"
+	printf 'root=/dev/mmcblk0p2 rootfstype=${fstype} fsck.repair=yes rootwait' >"$@"
 
 _bootloader_raspi: ${CFGROOT} ${CFGROOT}/boot/cmdline.txt
 
@@ -396,12 +405,14 @@ _partcopy: ${VOLUME} ${PROOT} ${PBOOT}
 	dd conv=notrunc,sparse bs=1M seek=$$((2 + ${BOOT_MB})) if="$${PROOT}" of="$${VOLUME}"
 
 _mount_root: ${PROOT} ${CFGROOT}
-	mount -t ext4 "$${PROOT}" "$${CFGROOT}"
+	mountpoint "$${CFGROOT}" \
+	|| mount -t ${fstype} "$${PROOT}" "$${CFGROOT}"
 	chmod 755 "$${CFGROOT}"
 
 _mount_boot: ${PBOOT}
 	mkdir -p -m 755 "$${CFGROOT}/boot"
-	mount -t vfat "$${PBOOT}" "$${CFGROOT}/boot"
+	mountpoint "$${CFGROOT}/boot" \
+	|| mount -t vfat "$${PBOOT}" "$${CFGROOT}/boot"
 
 ifdef disk
   _mount_boot: _mount_root
@@ -410,12 +421,14 @@ endif
 _mount: _mount_root _mount_boot
 
 _img_mount: ${CFGROOT}
-	mount -o loop,offset="$$((${BOOT_MB} + 2))"M,sizelimit=${ROOT_MB}M \
-	  -t ext4 "$${VOLUME}" "$${CFGROOT}"
+	mountpoint "$${CFGROOT}" \
+	|| mount -o loop,offset="$$((${BOOT_MB} + 2))"M,sizelimit=${ROOT_MB}M \
+		 -t ${fstype} "$${VOLUME}" "$${CFGROOT}"
 	chmod 755 "$${CFGROOT}"
 	mkdir -p -m 755 "$${CFGROOT}/boot"
-	mount -o loop,offset=2M,sizelimit=${BOOT_MB}M \
-	  -t vfat "$${VOLUME}" "$${CFGROOT}/boot"
+	mountpoint "$${CFGROOT}/boot" \
+	|| mount -o loop,offset=2M,sizelimit=${BOOT_MB}M \
+		 -t vfat "$${VOLUME}" "$${CFGROOT}/boot"
 
 _umount_boot: ${CFGROOT}
 	-umount "$${CFGROOT}/boot"
-- 
2.39.2