From af92d8d732d692ac9c2095575b250f99327fc607 Mon Sep 17 00:00:00 2001
From: Vitaliy Filippov <vitalif@yourcmc.ru>
Date: Tue, 16 Jun 2020 13:05:25 +0300
Subject: [PATCH] Add legacy boot installation script

---
 debian_nfs.sh     |  3 +-
 install-legacy.sh | 92 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100755 install-legacy.sh

diff --git a/debian_nfs.sh b/debian_nfs.sh
index b6f0188..5a44331 100755
--- a/debian_nfs.sh
+++ b/debian_nfs.sh
@@ -48,8 +48,9 @@ cp /home/overlayroot/init-bottom-overlay /home/nfsboot/etc/initramfs-tools/scrip
 mkdir -p /home/nfsboot/root/.ssh
 cp `dirname $0`/authorized_keys /home/nfsboot/root/.ssh
 
-# Copy install script
+# Copy installation script
 cp `dirname $0`/install.sh /home/nfsboot/root/
+cp `dirname $0`/install-legacy.sh /home/nfsboot/root/
 
 chroot /home/nfsboot <<EOF
 
diff --git a/install-legacy.sh b/install-legacy.sh
new file mode 100755
index 0000000..7fde88b
--- /dev/null
+++ b/install-legacy.sh
@@ -0,0 +1,92 @@
+#!/bin/bash
+# Copy NFS-booted Debian to the local drive and setup boot
+# Install with grub-pc (non-UEFI boot)
+
+set -e
+
+DEV=$1
+
+if [ ! -b $DEV ]; then
+    echo "USAGE: $0 /dev/sdXXX (sdXXX must be a block device)"
+    exit 1
+fi
+
+PART=${DEV}1
+
+mkdir -p /root/target
+
+# Unmount old chroot-mounts if any
+for i in boot/efi dev/pts dev proc sys; do
+    if grep -q " /root/target/$i " /proc/mounts; then
+        umount /root/target/$i
+    fi
+done
+if grep -q " /root/target " /proc/mounts; then
+    umount /root/target
+fi
+
+# Check if $PART already contains a filesystem
+if mount $PART /root/target &>/dev/null; then
+    umount /root/target
+    if [ "$WIPE" = "1" ]; then
+        echo "Device $PART already contains a filesystem. WIPE=1 specified. Wiping"
+        wipefs -a $DEV
+    else
+        echo "Device $PART already contains a filesystem. Wipe it first"
+        exit 1
+    fi
+fi
+
+# Make root partition
+SIZE=`blockdev --getsz $DEV`
+ROOT_SIZE=$((SIZE-2048-1048576))
+sfdisk $DEV <<EOF
+label: dos
+
+${DEV}1 : start=2048, type=83
+EOF
+
+mkfs.ext4 -F $PART
+
+UUID=`blkid -o value -s UUID $PART`
+
+# Mount new filesystems
+mount $PART /root/target
+
+# Copy Debian to the new partition
+cp -av /overlay/lower/* /root/target
+
+# Remove overlayroot from initramfs settings
+rm /root/target/etc/initramfs-tools/hooks/hooks-overlay
+rm /root/target/etc/initramfs-tools/scripts/init-bottom/init-bottom-overlay
+>/root/target/etc/initramfs-tools/modules
+cat >/root/target/etc/initramfs-tools/initramfs.conf <<EOF
+MODULES=most
+BUSYBOX=auto
+KEYMAP=n
+COMPRESS=gzip
+DEVICE=
+EOF
+
+# Remove ssh-keygen -A
+(echo '#!/bin/bash'; echo 'exit 0') > /root/target/etc/rc.local
+
+# Set fstab
+cp /etc/resolv.conf /root/target/etc/resolv.conf
+cat >/root/target/etc/fstab <<EOF
+UUID=$UUID / ext4 rw,relatime 0 0
+EOF
+
+# Install GRUB
+for i in dev dev/pts proc sys; do mount --bind /$i /root/target/$i; done
+chroot /root/target <<EOF
+ssh-keygen -A
+DEBIAN_FRONTEND=noninteractive apt-get -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" -y install grub-pc
+update-initramfs -u -k all
+update-grub
+grub-install $DEV
+EOF
+for i in dev/pts dev proc sys; do umount /root/target/$i; done
+
+# Unmount filesystems
+umount /root/target