create-filesystem

#!/bin/sh
set -eux

DISK="$1"

ROOT_SIZE="$2"
SWAP_SIZE="$3"

#LINUX_FS=8300
EFI_FS=EF00
LINUX_LVM=8e00
ALIGNMENT=4096

# Adjust partition naming for nvme drives
if echo "$DISK" | grep -q 'nvme' 2>/dev/null
then
    BOOT_PARTITION=${DISK}p1
    LVM_PARTITION=${DISK}p2
else
    BOOT_PARTITION=${DISK}1
    LVM_PARTITION=${DISK}2
fi

sgdisk -Z "$DISK" #zap disk
sgdisk -g "$DISK" #gpt setup
sgdisk -a"$ALIGNMENT" -n0:0:+512M -t"0:$EFI_FS" -c0:"boot" "$DISK"
sgdisk -a"$ALIGNMENT" -n0:0:0 -t"0:$LINUX_LVM" -c0:"lvm" "$DISK"
sgdisk -p "$DISK"

cryptsetup luksFormat "$LVM_PARTITION"
cryptsetup luksOpen "$LVM_PARTITION" lvm

pvcreate /dev/mapper/lvm
vgcreate brain /dev/mapper/lvm
lvcreate -L "$SWAP_SIZE" brain -n swap
lvcreate -L "$ROOT_SIZE" brain -n root
lvcreate -l 100%FREE brain -n home

mkfs.ext4 /dev/mapper/brain-root
mkfs.ext4 /dev/mapper/brain-home
mkswap /dev/mapper/brain-swap

mount /dev/mapper/brain-root /mnt
mkdir /mnt/home
mount /dev/mapper/brain-home /mnt/home
swapon /dev/mapper/brain-swap

#mkfs.ext4 "$BOOT_PARTITION"  # if LINUX_FS
mkfs.fat -F32 "$BOOT_PARTITION"
mkdir /mnt/boot
mount "$BOOT_PARTITION" /mnt/boot