commit 5480ab9f80bb47dab38d741931632d046115dfb5
Author: dataprolet <dataprolet@noreply.localhost>
Date:   Sat Dec 14 17:37:18 2024 +0100

    Add install.sh

diff --git a/install.sh b/install.sh
new file mode 100644
index 0000000..5fecdf2
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,189 @@
+#!/bin/usr/env bash
+
+# https://nixos.org/manual/nixos/stable/#sec-installation-manual
+
+# https://wizardzines.com/comics/bash-errors/bash-errors.png
+set -euo pipefail
+
+exec >> >(tee -i /tmp/install.log)
+exec 2>&1
+
+clear
+
+# Friendly introduction.
+echo "0. WELCOME"
+echo "Welcome to the NixOS installation script!"
+echo "This script will ERASE ALL DATA on the partition you will choose next!"
+echo
+read -p "Do you want to continue? Type [Y]es or [N]o. " -n 1 -r
+echo
+if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+    exit 1
+fi
+clear
+
+# Selecting disk.
+echo "1. PARTITIONING"
+echo "Please select a disk to partition:"
+echo
+
+# Don't separate values by space.
+IFS=$'\n'
+
+# Set variable containing name and size of all disks.
+declare -a dsks=( $(lsblk -d | tail -n+2 | awk '{print $1" "$4}') )
+
+# Select value on array.
+select dev in "${dsks[@]}"
+do
+
+break
+done
+echo
+
+# Separate values by spaces.
+IFS=' '
+
+# Create new variable of selection.
+array=("${dev}")
+dev="${array[0]}"
+
+clear
+
+echo "2. ENCRYPTION"
+echo
+
+# Setting encryption password.
+echo "Choose a strong password for encrypting the primary partition:"
+pwcr=""
+while [[ -z "${pwcr}" ]]; do
+    echo "Please enter a password: "
+    read -rs pwfr
+    read -rs -p "Retype a password: " pwsc
+        if [[ "${pwfr}" == "${pwsc}" ]];
+    then
+        pwcr="${pwfr}"
+        echo
+        echo "Both passwords are the same. Continuing.."
+        break
+    else
+        echo
+        echo "You have entered different passwords. Try again.."
+        echo
+    fi
+done
+
+clear
+
+echo "4. USER"
+echo
+
+# Setting username
+echo "Please enter a username:"
+read -r user
+echo
+
+echo "5. INSTALLING SYSTEM.."
+echo
+
+# Starting partitioning.
+echo "Partitioning /dev/${dev}.."
+echo    
+
+# Clearing partition table of selected disk.
+echo "Clearing existing partitioning table."
+sudo parted "/dev/${dev}" -- mklabel gpt
+echo
+
+# Creating boot partition.
+echo "Creating boot partition of 512 MB."
+sudo parted "/dev/${dev}" -- mkpart ESP 1MB 512MB
+echo
+
+# Setting type for EFI.
+echo "Setting partition type."
+sudo parted "/dev/${dev}" -- set 1 esp on
+echo
+
+# Creating system partition.
+echo "Creating system partition."
+sudo parted "/dev/${dev}" -- mkpart 512MB 100%
+echo
+
+# Print partitions.
+echo "This is your new partition table:"
+lsblk | grep "${dev}"
+echo
+
+# Get new variable.
+if [[ "${dev}" = "nvme0n1" ]]; then
+    main="${dev}p2"
+else
+    main="${dev}2"
+fi
+
+# Encrypting partition.
+echo "Encrypting system partition. This might take a while."
+echo
+echo -en "${pwcr}\n${pwcr}" | sudo cryptsetup -c aes-xts-plain -s 512 luksFormat /dev/$main
+echo "Partition successfully encrypted."
+echo
+
+# Opening encrypted partition and mounting at /dev/mapper/main.
+echo "Decrypting.. This also might take a while."
+echo
+echo -en "${pwcr}\n${pwcr}" | sudo cryptsetup open "/dev/${main}" main
+echo "Partition successfully opened."
+echo
+
+lsblk | grep "${dev}"
+echo
+
+echo "Creating the filesystem."
+
+if [ "${dev}" = "nvme0n1" ]; then
+    boot="${dev}p1"
+else
+    boot="${dev}1"
+fi
+
+sudo mkfs.fat -F 32 -n UEFI "/dev/${boot}"
+echo "Filesystem for boot successfully created."
+echo
+
+# Creating btrfs partition.
+sudo mkfs.btrfs "/dev/mapper/main"
+
+sudo mount "/dev/mapper/main" "/mnt"
+
+sudo btrfs subvolume create "/mnt/root"
+sudo btrfs subvolume create "/mnt/home"
+
+sudo umount "/mnt"
+echo
+
+echo "Mounting.."
+sudo mount -o autodefrag,compress=zstd:3,subvol=root "/dev/mapper/main" "/mnt"
+sudo mkdir -p "/mnt/home"
+sudo mount -o autodefrag,compress=zstd:3,subvol=home "/dev/mapper/main" "/mnt/home"
+sudo mkdir -p "/mnt/boot"
+sudo mount -o umask=077 "/dev/${boot}" "/mnt/boot"
+echo "Mounting complete."
+echo
+
+lsblk -a
+echo
+
+# Copy existing config
+sudo nixos-generate-config --root /mnt
+sudo mv /mnt/etc/nixos/configuration.nix /mnt/etc/nixos/configuration.nix.bak
+cp configuration.nix /mnt/etc/nixos
+
+# Replace username in config
+sudo sed -i "s/username/${user}/g" /mnt/etc/nixos/configuration.nix
+
+# Install
+sudo nixos-install
+
+# Set user password
+sudo nixos-enter --root /mnt -c 'passwd $user'
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