1 files changed, 139 insertions, 0 deletions
diff --git a/os_build/build-installer.sh b/os_build/build-installer.sh
new file mode 100644
index 0000000..7ede0c4
--- /dev/null
+++ b/os_build/build-installer.sh
@@ -0,0 +1,139 @@
+#!/bin/bash
+
+set -e # Exit on error
+
+DEVICE=$1
+
+[[ -z "${DEVICE}" ]]  && echo "Usage $0 /dev/sdX" && exit 1
+
+udevadm info -n ${DEVICE} -q property
+echo "Selected device is ${DEVICE}"
+read -p "[Press enter to continue or CTRL+C to stop]"
+
+echo "Umount ${DEVICE}"
+umount ${DEVICE}* || true
+
+echo "Set partition table to GPT (UEFI)"
+parted ${DEVICE} --script mktable gpt
+
+echo "Create EFI partition"
+parted ${DEVICE} --script mkpart EFI fat16 1MiB 10MiB
+parted ${DEVICE} --script set 1 msftdata on
+
+echo "Create OS partition"
+parted ${DEVICE} --script mkpart LINUX btrfs 10MiB 4GiB
+
+echo "Format partitions"
+mkfs.vfat -n EFI ${DEVICE}1
+mkfs.btrfs -f -L LINUX ${DEVICE}2
+
+ROOTFS_UUID=$(btrfs filesystem show ${DEVICE}2 | grep -Po "uuid: [a-f0-9-]+"|cut -c 7-44)
+if [[ -z ${ROOTFS_UUID} ]]; then
+echo "Rootfs UUID is <<${ROOTFS_UUID}>>"
+echo "WARNING! BUG! The UUID is not set in the fstab. Either because this command failed (empty UUID above) or because of chroot scoping. Please fix it."
+echo "Your OS will still be able to boot normally and remount the filesystem as RW but it could crash some apps like fsck"
+read -p "[Press enter to continue or CTRL+C to stop]"
+fi
+
+echo "Mount OS partition"
+ROOTFS="/tmp/installing-rootfs"
+mkdir -p ${ROOTFS}
+mount ${DEVICE}2 ${ROOTFS}
+
+echo "Debootstrap system"
+debootstrap --variant=minbase --arch amd64 buster ${ROOTFS} http://deb.debian.org/debian/
+
+echo "Mount EFI partition"
+mkdir -p ${ROOTFS}/boot/efi
+mount ${DEVICE}1 ${ROOTFS}/boot/efi
+
+echo "Get ready for chroot"
+mount --bind /dev ${ROOTFS}/dev
+mount -t devpts /dev/pts ${ROOTFS}/dev/pts
+mount -t proc proc ${ROOTFS}/proc
+mount -t sysfs sysfs ${ROOTFS}/sys
+mount -t tmpfs tmpfs ${ROOTFS}/tmp
+
+echo "Entering chroot, installing Linux kernel and Grub"
+cat << EOF | chroot ${ROOTFS}
+  set -e
+  export HOME=/root
+  export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/sbin
+  export DEBIAN_FRONTEND=noninteractive
+  debconf-set-selections <<< "grub-efi-amd64 grub2/update_nvram boolean false"
+  apt-get remove -y grub-efi grub-efi-amd64
+  apt-get update
+  apt-get install -y linux-image-generic linux-headers-generic grub-efi
+  grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=debian --recheck --no-nvram --removable
+  update-grub
+EOF
+
+echo "Install script based on dd"
+cat << 'EOF' > ${ROOTFS}/usr/local/sbin/os-install
+  #!/bin/bash
+
+  set -e
+
+  SOURCE=$1
+  TARGET=$2
+  # We write partitions until 4GiB = 4 * 1024^3 (https://en.wikipedia.org/wiki/Gibibyte)
+  # In dd, M means 1048576 bytes = 1024^2 (man dd)
+  # So we need to copy (4 * 1024^3) / (4 * 1024^2) = 0.5 * 1024 = 1024 blocks
+  dd if=${SOURCE} of=${TARGET} bs=4M status=progress count=1030
+  growpart ${TARGET} 2
+  mount ${TARGET}2 /mnt
+  btrfs filesystem resize max /mnt
+  umount /mnt
+  echo "you might want to run: btrfstune -u ${TARGET}2 but you will need to update the fstab"
+  echo "you might want to change systemd machine UUID"
+  echo "you might want to change /etc/systemd/network/en.network configuration"
+EOF
+
+chmod +x ${ROOTFS}/usr/local/sbin/os-install
+
+echo "Entering chroot (bis), installing daemon"
+cat << EOF | chroot ${ROOTFS}
+  set -e
+  export HOME=/root
+  export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/sbin
+  export DEBIAN_FRONTEND=noninteractive
+
+  # Set fstab
+  echo "UUID=${ROOTFS_UUID} / btrfs defaults 0 0" > /etc/fstab
+
+  # Install systemd and OpenSSH
+  apt-get update
+  apt-get install -y systemd openssh-server sudo btrfs-tools cloud-utils python 
+  systemctl enable ssh
+
+  # Enable systemd services
+  systemctl enable systemd-networkd systemd-timesyncd systemd-resolved
+
+  # Listen on any ethernet interface for DHCP
+  tee /etc/systemd/network/en.network << EOG
+[Match]
+Name=en*
+
+[Network]
+DHCP=ipv4
+EOG
+
+  # Add SSH keys
+  mkdir -p /root/.ssh
+  tee /root/.ssh/authorized_keys << EOG
+ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDT1+H08FdUSvdPpPKdcafq4+JRHvFVjfvG5Id97LAoROmFRUb/ZOMTLdNuD7FqvW0Da5CPxIMr8ZxfrFLtpGyuG7qdI030iIRZPlKpBh37epZHaV+l9F4ZwJQMIBO9cuyLPXgsyvM/s7tDtrdK1k7JTf2EVvoirrjSzBaMhAnhi7//to8zvujDtgDZzy6aby75bAaDetlYPBq2brWehtrf9yDDG9WAMYJqp//scje/WmhbRR6eSdim1HaUcWk5+4ZPt8sQJcy8iWxQ4jtgjqTvMOe5v8ZPkxJNBine/ZKoJsv7FzKem00xEH7opzktaGukyEqH0VwOwKhmBiqsX2yN quentin@dufour.io
+EOG
+  
+  echo "Done"
+EOF
+
+echo "Unmounting filesystems"
+umount ${ROOTFS}/dev/pts
+umount ${ROOTFS}/dev
+umount ${ROOTFS}/proc
+umount ${ROOTFS}/sys
+umount ${ROOTFS}/tmp
+umount ${ROOTFS}/boot/efi
+umount ${ROOTFS}
+
+echo "Done"