Install Arch without ArchInstall

archinstall.sh

#!/bin/bash

# Arch installation script
# Author: sawntoe
# This script is intended for quick VM installation without ArchInstall. Thus, it does not create swap, and should be scripted in by the user should they want this functionality.
# The user should read through the script and modify it to his needs. The user should not attempt to blindly run the script.
# This script is also intended to be a learning tool for newbies, as it is heavily documented. This gives it an edge over archinstall, which is like a magic black box that the user doesn't understand.

# exit on error
set -e

# check if there is internet connection
ping -q -w 1 -c 1 8.8.8.8 > /dev/null

device=$1 # Device to install on (e.g /dev/sda)
hostname=$2 # Hostname of install 
region=$3 # Region to link to /etc/localtime (e.g. Asia/Singapore)
locale=$4 # UTF-8 locale to set as language (e.g. en_SG.UTF-8)

read -s -p "Enter password: " password # Prompt user for password for root

# ensure device exists
ls $device > /dev/null

# deletes all partitions on device
wipefs -a $device

# partition device
parted $device --script mklabel gpt
parted $device --script mkpart primary 1MiB 128MiB
parted $device --script mkpart primary 128MiB 100%

lsblk

# Note: THIS WILL NOT WORK IF YOU HAVE A DEVICE LIKE nvme0n1 WHERE PARTITIONS ARE LIKE nvme0n1p1. COMMENT THESE LINES AND UNCOMMENT THE OTHER TWO
boot_partition=${device}1
root_partition=${device}2
# boot_partition=${device}p1
# root_partition=${device}p2

# Format partitions
mkfs.fat -F 32 $boot_partition
mkfs.ext4 $root_partition

# Mount partitions
mount $root_partition /mnt
mount --mkdir $boot_partition /mnt/boot/efi

# Rank mirrors
pacman -Sy --noconfirm pacman-contrib
cp /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist.bak
rankmirrors -n 6 /etc/pacman.d/mirrorlist.bak > /etc/pacman.d/mirrorlist

# bootstrap system. This can be modified
pacstrap -K /mnt base base-devel linux linux-firmware sof-firmware sof-tools grub efibootmgr net-tools networkmanager

# Generate fstab
genfstab -U /mnt >> /mnt/etc/fstab

# Chroot into system
arch-chroot /mnt <<EOT

# setup localtime and locales
ln -sf /usr/share/zoneinfo/$region /etc/localtime
hwclock --systohc
locale-gen
echo "$locale UTF8" >> /etc/locale.gen
echo "LANG=$locale" > /etc/locale.conf
locale-gen

# set hostname
echo "$hostname" > /etc/hostname

# set root password
echo "root:$password" | chpasswd

# allow all users of group "wheel" to execute commands as root
printf "\n%%wheel ALL=(ALL:ALL) NOPASSWD: ALL" >> /etc/sudoers

# enable NetworkManager
systemctl enable NetworkManager

# install grub
grub-install $boot_partition --target=x86_64-efi
grub-mkconfig -o /boot/grub/grub.cfg

# install yay
pacman -S --needed --noconfirm git base-devel && git clone https://aur.archlinux.org/yay.git && cd yay && makepkg -si
exit
EOT

echo 'You are free to unmount and reboot!'