From a3ea4fb2e4ea5e34ed19515d5af513f62cdc09c1 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Sun, 14 Jul 2019 23:24:43 +0200
Subject: [PATCH] disk image builder

---
 Makefile                       | 123 +++++++++++++++++++++++++++------
 cfg_syslinux/boot/bootmenu.cfg |  16 +++++
 cfg_syslinux/boot/syslia32.cfg |   3 +
 cfg_syslinux/boot/syslinux.cfg |   3 +
 cfg_syslinux/boot/syslx64.cfg  |   3 +
 5 files changed, 127 insertions(+), 21 deletions(-)
 create mode 100644 cfg_syslinux/boot/bootmenu.cfg
 create mode 100644 cfg_syslinux/boot/syslia32.cfg
 create mode 100644 cfg_syslinux/boot/syslinux.cfg
 create mode 100644 cfg_syslinux/boot/syslx64.cfg

diff --git a/Makefile b/Makefile
index 65005eb..d2493c5 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,19 @@
 
 DEFAULT: _target
-.PHONY: _target _qemu _partition _format _mount _bootstrap _install _sparse _copy _config _syslinux _umount _partcopy _squash _mbr
+.PHONY: clean _target _qemu _partition _format _mount _bootstrap _install _sparse _copy _config _syslinux _umount _partcopy _squash _mbr
 
 ARCH := amd64
 KEYRING := keys/debian-archive-stretch-stable.gpg
 BOOTSTRAP := http://cdn.debian.net/debian
 
+# Partition Table + Boot Partition + Root Partition = 2048M
+BOOT_MB := 126
+ROOT_MB := 1920
+
 define SOURCES = 
 deb	http://cdn.debian.net/debian stretch main
 endef
+
 PACKAGES := ${PACKAGES} apt btrfs-tools busybox-static bzip2 ca-certificates cron debian-archive-keyring deborphan firmware-linux-free gzip htop ifupdown init iputils-ping irqbalance isc-dhcp-client less make net-tools nmap ntpdate openssh-client psmisc rsync sshfs sudo systemd traceroute unzip vim wget wireless-tools wpasupplicant xz-utils zip
 
 ifdef disk
@@ -66,7 +71,7 @@ _config: _copy
 _squash: _config
 
 else ifdef raspi
-VOLUME := ${image}
+VOLUME := ${raspi}
 PBOOT := rpi_boot.img
 PROOT := rpi_root.img
 SYSROOT := rpi_root/
@@ -110,10 +115,22 @@ endif
 
 export SOURCES SYSROOT CFGROOT VOLUME PBOOT PROOT SQUASH ARCH KEYRING BOOTSTRAP
 
-${SYSROOT}:
-	btrfs subvol create "$$SYSROOT" || mkdir -p "$$SYSROOT}"
+sys_root/:
+	btrfs subvol create "$@" || mkdir -p "$@"
+	chmod 755 "$@"
+
+cfg_root/: sys_root/ _install
+	btrfs sub snap "$<" "$@" || mkdir -p "$@"
+	chmod 755 "$@"
+
+img_mount/:
+	mkdir -p "$@"
+	chmod 755 "$@"
+
+hdd_mount/:
+	mkdir -p "$@"
 	chmod 755 "$@"
-	
+
 _qemu: ${SYSROOT}/usr/bin/qemu-arm-static
 ${SYSROOT}/usr/bin/qemu-arm-static: /usr/bin/qemu-arm-static ${SYSROOT}
 	mkdir -p "$${SYSROOT}"/usr/bin
@@ -151,33 +168,97 @@ _install: ${SYSROOT} _aptkeys _norecommends
 	chroot "$${SYSROOT}" apt-get clean
 	chroot "$${SYSROOT}" rm /usr/local/sbin/invoke-rc.d
 
-_copy: ${SYSROOT}
-	btrfs sub snap "$${SYSROOT}" "$${CFGROOT}" || \
-		cp -a "$${SYSROOT}/." "$${CFGROOT}/"
+_copy: ${SYSROOT} ${CFGROOT}
+	cp -au "$${SYSROOT}/." "$${CFGROOT}/"
 
 .PHONY: _main_config
 _config: _main_config
 _main_config: ${CFGROOT} cfg_seed/
-	cp -a cfg_seed/. "$${CFGROOT}"
+	cp -au cfg_seed/. "$${CFGROOT}"
 
 ${SQUASH}: ${CFGROOT}
-	-rm "$@"
-	mksquashfs "$$CFGROOT" "$$SQUASH" -comp xz
+	-rm "$${SQUASH}"
+	mksquashfs "$${CFGROOT}" "$${SQUASH}" -comp xz
 
 _squash: ${SQUASH}
 
+${VOLUME}:
+	! printf '%s\n' "$${VOLUME}" |grep -q '^/dev/'  # abort if volume should be real device
+	dd bs=1M count=0 seek=$$((2 + ${BOOT_MB} + ${ROOT_MB})) of="$${VOLUME}"
+
+${PBOOT}:
+	! printf '%s\n' "$${PBOOT}" |grep -q '^/dev/'  # abort if volume should be real device
+	dd bs=1M count=0 seek=${BOOT_MB} of="$${PBOOT}"
+
+${PROOT}:
+	! printf '%s\n' "$${PROOT}" |grep -q '^/dev/'  # abort if volume should be real device
+	dd bs=1M count=0 seek=${ROOT_MB} of="$${PROOT}"
+
+_partition: ${VOLUME}
+	printf 'label: gpt\n\n: start=2MiB, size=%iMiB, type=1, attrs="LegacyBIOSBootable"\n: type=20\n' \
+		${BOOT_MB} | sfdisk "$${VOLUME}"
+
+_sparse: ${PBOOT} ${PROOT}
+
+_format: ${PBOOT} ${PROOT}
+	-umount "$${CFGROOT}/boot" "$${CFGROOT}"
+	mkfs.fat -F 32 -n boot "$${PBOOT}"
+	mkfs.ext4 -F -L FSROOT "$${PROOT}"
+
+.PHONY: _syslinux_efi32 _syslinux_efi64 _syslinux_bios
+_syslinux_efi32: ${CFGROOT}
+	mkdir -p "$${CFGROOT}/boot/EFI/BOOT"
+	cp /usr/lib/SYSLINUX.EFI/efi32/syslinux.efi "$${CFGROOT}/boot/EFI/BOOT/BOOTIA32.EFI"
+	mkdir -p "$${CFGROOT}/boot/efi32"
+	cp $(addprefix /usr/lib/syslinux/modules/efi32/, ldlinux.e32 menu.c32 libutil.c32) "$${CFGROOT}"/boot/efi32/
+
+_syslinux_efi64: ${CFGROOT}
+	mkdir -p "$${CFGROOT}/boot/EFI/BOOT"
+	cp /usr/lib/SYSLINUX.EFI/efi64/syslinux.efi "$${CFGROOT}/boot/EFI/BOOT/BOOTX64.EFI"
+	mkdir -p "$${CFGROOT}/boot/efi64"
+	cp $(addprefix /usr/lib/syslinux/modules/efi64/, ldlinux.e64 menu.c32 libutil.c32) "$${CFGROOT}"/boot/efi32/
+
+_syslinux_bios: ${CFGROOT}
+	mkdir -p "$${CFGROOT}/boot/bios"
+	cp $(addprefix /usr/lib/syslinux/modules/bios/,  menu.c32 libutil.c32) "$${CFGROOT}"/boot/bios/
+
+_syslinux: ${CFGROOT} _syslinux_efi32 _syslinux_efi64 _syslinux_bios
+	cp -L "$${CFGROOT}/vmlinuz" "$${CFGROOT}/initrd.img" "$${CFGROOT}/boot/"
+	cp -ru cfg_syslinux/. "$${CFGROOT}/"
+
+_mbr: ${VOLUME}
+	syslinux -t 2097152 -i "$${VOLUME}"
+	dd conv=notrunc if=/usr/lib/syslinux/mbr/gptmbr.bin of="$${VOLUME}"
+
+_partcopy: ${VOLUME} ${PROOT} ${PBOOT}
+	dd bs=1M seek=2 if="$${PBOOT}" of="$${VOLUME}"
+	dd bs=1M seek=$$((2 + ${BOOT_MB})) if="$${PROOT}" of="$${VOLUME}"
+
+_mount: ${PBOOT} ${PROOT} ${CFG_ROOT}
+	mount -t ext4 "$${PROOT}" "$${CFGROOT}"
+	chmod 755 "$${CFGROOT}"
+	mkdir -p "$${CFGROOT}/boot"
+	chmod 755 "$${CFGROOT}/boot"
+	mount -t vfat "$${PBOOT}" "$${CFGROOT}/boot"
+	chmod 755 "$${CFGROOT}/boot"
+
+_umount: ${CFGROOT}
+	-umount "$${CFGROOT}/boot"
+	umount "$${CFGROOT}" && rmdir "$${CFGROOT}"
+
 clean:
 	[ "$${SYSROOT#/}" ] && [ "$${CFGROOT#/}" ] || false  # (abort receipe)
-	-mount |grep -qwF "$${SYSROOT}/boot" && umount "$${SYSROOT}/boot"
-	-mount |grep -qwF "$${SYSROOT}/proc" && umount "$${SYSROOT}/proc"
-	-mount |grep -qwF "$${SYSROOT}/sys" && umount "$${SYSROOT}/sys"
-	-mount |grep -qwF "$${SYSROOT}/dev" && umount "$${SYSROOT}/dev"
-	-mount |grep -qwF "$${SYSROOT}" && umount "$${SYSROOT}"
-	-mount |grep -qwF "$${CFGROOT}" && umount "$${CFGROOT}"
-	if [ -d "$${SYSROOT}" ] && ! mount |grep -qwFe "$${SYSROOT}"; then \
-		btrfs sub del "$${SYSROOT}" || echo rm -r "$${SYSROOT}"; \
+	-umount img_mount/boot
+	-umount img_mount
+	-rmdir img_mount
+	-umount hdd_mount/boot
+	-umount hdd_mount
+	-rmdir hdd_mount
+	if [ -d "sys_root/" ] && ! mount |grep -qwFe "sys_root/"; then \
+		btrfs sub del "sys_root/" || echo rm -r "sys_root/"; \
 	fi
-	if [ -d "$${CFGROOT}" ] && ! mount |grep -qwFe "$${CFGROOT}"; then \
-		btrfs sub del "$${CFGROOT}" || echo rm -r "$${CFGROOT}"; \
+	if [ -d "cfg_root/" ] && ! mount |grep -qwFe "cfg_root/"; then \
+		btrfs sub del "cfg_root/" || echo rm -r "cfg_root/"; \
 	fi
 	-rm "$${SQUASH}"
+	-[ -f "$${VOLUME}" ] && rm "$${VOLUME}"
diff --git a/cfg_syslinux/boot/bootmenu.cfg b/cfg_syslinux/boot/bootmenu.cfg
new file mode 100644
index 0000000..dbebfeb
--- /dev/null
+++ b/cfg_syslinux/boot/bootmenu.cfg
@@ -0,0 +1,16 @@
+UI menu.c32
+
+DEFAULT stretch
+TIMEOUT 30
+
+LABEL stretch
+  MENU LABEL Debian Stretch
+  KERNEL /vmlinuz
+  INITRD /initrd.img
+  APPEND root=LABEL=FSROOT
+
+LABEL stretch_rescue
+  MENU LABEL Debian Stretch Rescue
+  KERNEL /vmlinuz
+  INITRD /initrd.img
+  APPEND root=LABEL=FSROOT init=/bin/sh
diff --git a/cfg_syslinux/boot/syslia32.cfg b/cfg_syslinux/boot/syslia32.cfg
new file mode 100644
index 0000000..84e692e
--- /dev/null
+++ b/cfg_syslinux/boot/syslia32.cfg
@@ -0,0 +1,3 @@
+PATH /efi32
+INCLUDE /bootmenu.cfg
+MENU TITLE Syslinux EFI-32
diff --git a/cfg_syslinux/boot/syslinux.cfg b/cfg_syslinux/boot/syslinux.cfg
new file mode 100644
index 0000000..b6397a5
--- /dev/null
+++ b/cfg_syslinux/boot/syslinux.cfg
@@ -0,0 +1,3 @@
+PATH bios
+INCLUDE bootmenu.cfg
+MENU TITLE Syslinux BIOS
diff --git a/cfg_syslinux/boot/syslx64.cfg b/cfg_syslinux/boot/syslx64.cfg
new file mode 100644
index 0000000..88f0ad3
--- /dev/null
+++ b/cfg_syslinux/boot/syslx64.cfg
@@ -0,0 +1,3 @@
+PATH /efi64
+INCLUDE /bootmenu.cfg
+MENU TITLE Syslinux EFI-64
-- 
2.39.2