Arch Linux - Base Install Script - UEFI BTRFS

arch-install-btrfs.sh

#!/bin/bash

set -e
set -o pipefail
set -o errtrace
set -o nounset
set -o errexit  

KEYMAP='us'
LANG='en_US'
TIMEZONE='Europe/Berlin'
FONT=Lat2-Terminus16

BLOCKDEVICEDISK=/dev/sda
BLOCKDEVICEBOOT=/dev/sda1
BLOCKDEVICESWAP=/dev/sda2
BLOCKDEVICEBTRFS=/dev/sda3

SUBVOLROOT=@
SUBVOLHOME=@home
SUBVOLPKG=@pkg
SUBVOLSNAPSHOTS=@snapshots

EFISIZE=256M
SWAPSIZE=2G

MNT=/mnt

HOSTNAME=archbox
DEFAULTUSER=deccer

(
	echo o
	echo Y
	echo n
	echo 1
	echo 
	echo +$EFISIZE
	echo ef00
    echo n
    echo 2
    echo 
    echo +$SWAPSIZE
    echo 8200
	echo n
	echo 3
	echo 
	echo 
	echo 8300
	echo w
	echo Y
) | sudo gdisk $BLOCKDEVICEDISK > /dev/null

mkfs.fat -F 32 -n BOOT $BLOCKDEVICEBOOT
mkswap $BLOCKDEVICESWAP
swapon $BLOCKDEVICESWAP
mkfs.btrfs -f -L ROOT $BLOCKDEVICEBTRFS

mount $BLOCKDEVICEBTRFS $MNT
cd $MNT
btrfs sub create $SUBVOLROOT
btrfs sub create $SUBVOLHOME
btrfs sub create $SUBVOLPKG
btrfs sub create $SUBVOLSNAPSHOTS
cd ..
umount $MNT
mount -o noatime,compress=lzo,space_cache,subvol=$SUBVOLROOT $BLOCKDEVICEBTRFS $MNT
mkdir -p $MNT/{boot,home,var/cache/pacman/pkg,.snapshots,btrfs}
mount $BLOCKDEVICEBOOT $MNT/boot
mount -o noatime,compress=lzo,space_cache,subvol=$SUBVOLHOME $BLOCKDEVICEBTRFS $MNT/home
mount -o noatime,compress=lzo,space_cache,subvol=$SUBVOLPKG $BLOCKDEVICEBTRFS $MNT/var/cache/pacman/pkg
mount -o noatime,compress=lzo,space_cache,subvol=$SUBVOLSNAPSHOTS $BLOCKDEVICEBTRFS $MNT/.snapshots
mount -o noatime,compress=lzo,space_cache,subvolid=5 $BLOCKDEVICEBTRFS $MNT/btrfs

pacstrap $MNT base base-devel btrfs-progs dosfstools

echo "/dev/disk/by-uuid/$(blkid -s UUID -o value $BLOCKDEVICEBTRFS)   /       btrfs   rw,noatime,compress=lzo,space_cache,subvol=$SUBVOLROOT  0 0" > $MNT/etc/fstab
echo "/dev/disk/by-uuid/$(blkid -s UUID -o value $BLOCKDEVICEBOOT)    /boot   vfat    rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro  0 2" >> $MNT/etc/fstab
echo "/dev/disk/by-uuid/$(blkid -s UUID -o value $BLOCKDEVICEBTRFS)   /home   btrfs   rw,noatime,compress=lzo,space_cache,subvol=$SUBVOLHOME  0 0" >> $MNT/etc/fstab
echo "/dev/disk/by-uuid/$(blkid -s UUID -o value $BLOCKDEVICEBTRFS)   /var/cache/pacman/pkg   btrfs   rw,noatime,compress=lzo,space_cache,subvol=$SUBVOLPKG  0 0" >> $MNT/etc/fstab
echo "/dev/disk/by-uuid/$(blkid -s UUID -o value $BLOCKDEVICEBTRFS)   /.snapshots   btrfs   rw,noatime,compress=lzo,space_cache,subvol=$SUBVOLSNAPSHOTS  0 0" >> $MNT/etc/fstab
echo "/dev/disk/by-uuid/$(blkid -s UUID -o value $BLOCKDEVICEBTRFS)   /btrfs  btrfs   rw,noatime,compress=lzo,space_cache,subvolid=5,subvol=/  0 0" >> $MNT/etc/fstab
echo "/dev/disk/by-uuid/$(blkid -s UUID -o value $BLOCKDEVICESWAP)    none    swap    defaults  0 0" >> $MNT/etc/fstab

arch-chroot $MNT ln -sf /usr/share/zoneinfo/$TIMEZONE /etc/localtime
arch-chroot $MNT hwclock --systohc

echo $LANG.UTF-8 UTF-8 > /mnt/etc/locale.gen
arch-chroot $MNT locale-gen

echo LANG=$LANG.UTF-8 >> $MNT/etc/locale.conf
echo KEYMAP=$KEYMAP > $MNT/etc/vconsole.conf
echo FONT=$FONT >> $MNT/etc/vconsole.conf

echo $HOSTNAME >> $MNT/etc/hostname
echo 127.0.0.1	$HOSTNAME.localdomain	$HOSTNAME >> $MNT/etc/hosts

arch-chroot $MNT useradd -m -G wheel -s /bin/bash $DEFAULTUSER
echo 'root ALL=(ALL) ALL' > $MNT/etc/sudoers
echo '%wheel ALL=(ALL) ALL' >> $MNT/etc/sudoers

MKINITCPIOCONF=$MNT/etc/mkinitcpio.conf
echo 'MODULES=()' > $MKINITCPIOCONF
echo 'BINARIES=()' >> $MKINITCPIOCONF
echo 'FILES=()' >> $MKINITCPIOCONF
echo 'HOOKS=(base udev autodetect modconf block btrfs filesystems keyboard)' >> $MKINITCPIOCONF
echo 'COMPRESSION=lzma' >> $MKINITCPIOCONF

arch-chroot $MNT mkinitcpio -p linux

LOADERCONF=$MNT/boot/loader/loader.conf
arch-chroot $MNT bootctl --path=/boot install
echo 'default arch' > $LOADERCONF
echo 'timeout 3' >> $LOADERCONF
echo 'editor  0' >> $LOADERCONF
BOOTENTRY=$MNT/boot/loader/entries/arch.conf
echo 'title   Arch Linux' > $BOOTENTRY
echo 'linux   /vmlinuz-linux' >> $BOOTENTRY
echo 'initrd  /initramfs-linux.img' >> $BOOTENTRY
echo "options root=UUID=$(blkid -s UUID -o value $BLOCKDEVICEBTRFS) rootflags=subvol=$SUBVOLROOT rw" >> $BOOTENTRY

arch-chroot $MNT systemctl enable dhcpcd.service

echo 'Installation almost complete. Setting passwords'
echo 'Choose a root password:'
arch-chroot $MNT passwd

echo Choose a password for $DEFAULTUSER:
arch-chroot $MNT passwd $DEFAULTUSER

umount -R $MNT
clear
echo 'Installation finished, please reboot now.'