Simplify installer script to non-interactive flow
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randogoth
parent
defa82c46c
commit
cd49f479dd
2 changed files with 27 additions and 203 deletions
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@ -1,17 +1,16 @@
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NixOS installer (flake + Lix)
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=============================
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1) Build is prewired with Lix; the installer ISO includes the repo.
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2) Run the guided Btrfs installer:
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1) Build is prewired with Lix; the installer ISO includes the repo at /etc/nixos.
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2) Run the non-interactive Btrfs installer (set envs as needed):
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sudo ./scripts/install-btrfs.sh
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sudo DISK=/dev/vda HOSTNAME=nixos /etc/nixos/scripts/install-btrfs.sh
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- Interactive by default (choose disk, LUKS, swap).
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- Non-interactive example:
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sudo NON_INTERACTIVE=1 USE_LUKS=1 LUKS_PASSPHRASE='secret' SWAP_GB=4 DISK=/dev/sda HOSTNAME=myhost ./scripts/install-btrfs.sh
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Defaults: DISK=/dev/vda, HOSTNAME=nixos
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The script wipes the disk, creates Btrfs subvolumes (root, home, nix), copies the flake, generates hardware config, and installs with the chosen host name.
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3) After install finishes, reboot into the new system.
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Notes
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- Filesystem is always Btrfs with subvolumes: root, home, nix (and swapfile if enabled).
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- Filesystem is Btrfs with subvolumes: root, home, nix.
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- The flake lives under /etc/nixos on the target; edit hosts/<hostname>.nix to customize.
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217
scripts/install-btrfs.sh
Executable file → Normal file
217
scripts/install-btrfs.sh
Executable file → Normal file
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@ -1,220 +1,48 @@
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#!/usr/bin/env bash
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set -euo pipefail
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# Automated Btrfs install using the flake in this repo.
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# Defaults remain environment-driven for headless use.
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# Interactive prompts are shown unless --non-interactive is set.
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# Non-interactive Btrfs installer using the flake in this repo.
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# Defaults: DISK=/dev/vda HOSTNAME=nixos
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NON_INTERACTIVE=0
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if [[ "${1:-}" == "--non-interactive" ]]; then
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NON_INTERACTIVE=1
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shift
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fi
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DISK=${DISK:-/dev/vda} # full-disk target
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ROOT_PART=${ROOT_PART:-} # optional existing root partition
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BOOT_PART=${BOOT_PART:-} # optional existing boot (FAT) partition
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HOSTNAME=${HOSTNAME:-nanuqsaurus}
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USE_LUKS=${USE_LUKS:-0} # 1 to encrypt root
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SWAP_GB=${SWAP_GB:-0} # swap size in GB, 0 disables
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DISK=${DISK:-/dev/vda}
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HOSTNAME=${HOSTNAME:-nixos}
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SCRIPT_DIR=$(cd -- "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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REPO_ROOT=$(cd -- "${SCRIPT_DIR}/.." && pwd)
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has_cmd() { command -v "$1" >/dev/null 2>&1; }
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echo "[1/7] Partitioning ${DISK}"
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printf "label: gpt\n,550M,U\n,,L\n" | sfdisk "${DISK}"
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prompt_select() {
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local title="$1" prompt="$2" choices=("${@:3}")
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if (( NON_INTERACTIVE )); then
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echo "${choices[0]}"
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return
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fi
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if has_cmd dialog; then
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dialog --no-cancel --menu "$prompt" 15 60 6 "${choices[@]}" 2> /tmp/choice
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cat /tmp/choice
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elif has_cmd whiptail; then
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whiptail --notags --menu "$prompt" 15 60 6 "${choices[@]}" 2> /tmp/choice || true
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cat /tmp/choice
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else
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echo "$prompt"
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select c in "${choices[@]}"; do echo "$c"; break; done
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fi
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}
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echo "[2/7] Formatting"
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mkfs.fat -F 32 "${DISK}1"
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mkfs.btrfs -f "${DISK}2"
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prompt_yes_no() {
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local prompt="$1" default="${2:-n}"
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if (( NON_INTERACTIVE )); then
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[[ "$default" =~ ^[Yy]$ ]] && echo "yes" || echo "no"
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return
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fi
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if has_cmd dialog; then
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if dialog --yesno "$prompt" 8 60; then echo "yes"; else echo "no"; fi
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elif has_cmd whiptail; then
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if whiptail --yesno "$prompt" 8 60; then echo "yes"; else echo "no"; fi
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else
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read -rp "$prompt [y/N]: " ans
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[[ "${ans:-$default}" =~ ^[Yy]$ ]] && echo "yes" || echo "no"
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fi
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}
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prompt_input() {
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local prompt="$1" default="$2"
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if (( NON_INTERACTIVE )); then
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echo "$default"
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return
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fi
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if has_cmd dialog; then
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dialog --inputbox "$prompt" 8 60 "$default" 2>/tmp/input && cat /tmp/input || echo "$default"
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elif has_cmd whiptail; then
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whiptail --inputbox "$prompt" 8 60 "$default" 2>/tmp/input && cat /tmp/input || echo "$default"
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else
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read -rp "$prompt [$default]: " ans
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echo "${ans:-$default}"
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fi
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}
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ls_disks() {
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lsblk -dpno NAME,SIZE,TYPE | awk '$3=="disk"{print $1" "$2}'
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}
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if (( ! NON_INTERACTIVE )); then
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mapfile -t disks < <(ls_disks)
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if ((${#disks[@]})); then
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disk_choices=()
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for d in "${disks[@]}"; do
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disk_choices+=("$d" "")
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done
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DISK=$(prompt_select "disk" "Select target disk (will be wiped)" "${disk_choices[@]}")
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DISK=${DISK%% *} # strip size suffix from selection
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fi
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target_mode=$(prompt_select "mode" "Partitioning mode" \
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"full-disk" "Use entire disk (wipes!)" \
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"existing" "Use existing partitions")
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if [[ "$target_mode" == "existing" ]]; then
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ROOT_PART=$(prompt_input "Root partition (will be formatted btrfs)" "${ROOT_PART:-/dev/vda2}")
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BOOT_PART=$(prompt_input "Boot EFI partition (FAT32)" "${BOOT_PART:-/dev/vda1}")
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fi
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USE_LUKS=$(prompt_yes_no "Encrypt root with LUKS?" "n")
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[[ "$USE_LUKS" == "yes" ]] && USE_LUKS=1 || USE_LUKS=0
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SWAP_GB=$(prompt_input "Swap size in GB (0 = none)" "${SWAP_GB}")
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fi
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echo "[0/8] Summary:"
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echo " Disk: ${DISK}"
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if [[ -n "$ROOT_PART" ]]; then
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echo " Root partition: $ROOT_PART"
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echo " Boot partition: $BOOT_PART"
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else
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echo " Mode: full disk wipe"
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fi
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echo " LUKS: $([ "$USE_LUKS" -eq 1 ] && echo enabled || echo disabled)"
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echo " Swap: ${SWAP_GB}G"
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echo " Hostname: ${HOSTNAME}"
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if (( NON_INTERACTIVE )); then
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echo "Proceeding in non-interactive mode."
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else
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if [[ "$(prompt_yes_no "Proceed with these settings? This will destroy data." "n")" != "yes" ]]; then
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echo "Aborted."
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exit 1
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fi
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fi
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part_boot=""
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part_root=""
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mapper_root=""
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echo "[1/8] Partitioning/selection"
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if [[ -z "$ROOT_PART" ]]; then
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if [[ ! -b "$DISK" ]]; then
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echo "Error: target disk ${DISK} not found. Available disks:"
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ls_disks
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exit 1
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fi
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printf "label: gpt\n,550M,U,boot\n,,L,cryptroot\n" | sfdisk "${DISK}"
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part_boot="${DISK}1"
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part_root="${DISK}2"
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else
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part_boot="${BOOT_PART}"
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part_root="${ROOT_PART}"
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fi
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echo "[2/8] Formatting boot"
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mkfs.fat -F 32 "${part_boot}"
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echo "[3/8] Preparing root"
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if [[ "$USE_LUKS" -eq 1 ]]; then
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pass=${LUKS_PASSPHRASE:-}
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if [[ -z "$pass" && $NON_INTERACTIVE -eq 0 ]]; then
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pass=$(prompt_input "LUKS passphrase" "")
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fi
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if [[ -z "$pass" ]]; then
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echo "LUKS passphrase required for encrypted install"
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exit 1
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fi
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printf "%s" "$pass" | cryptsetup luksFormat "${part_root}" -
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printf "%s" "$pass" | cryptsetup open "${part_root}" cryptroot -
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mapper_root="/dev/mapper/cryptroot"
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else
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mapper_root="${part_root}"
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fi
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mkfs.btrfs -f "${mapper_root}"
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echo "[4/8] Creating Btrfs subvolumes"
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echo "[3/7] Creating Btrfs subvolumes"
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mkdir -p /mnt
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mount "${mapper_root}" /mnt
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mount "${DISK}2" /mnt
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btrfs subvolume create /mnt/root
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btrfs subvolume create /mnt/home
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btrfs subvolume create /mnt/nix
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umount /mnt
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echo "[5/8] Mounting subvolumes"
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mount -o compress=zstd,subvol=root "${mapper_root}" /mnt
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echo "[4/7] Mounting subvolumes"
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mount -o compress=zstd,subvol=root "${DISK}2" /mnt
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mkdir -p /mnt/{home,nix,boot}
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mount -o compress=zstd,subvol=home "${mapper_root}" /mnt/home
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mount -o compress=zstd,subvol=nix "${mapper_root}" /mnt/nix
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mount "${part_boot}" /mnt/boot
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mount -o compress=zstd,subvol=home "${DISK}2" /mnt/home
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mount -o compress=zstd,subvol=nix "${DISK}2" /mnt/nix
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mount "${DISK}1" /mnt/boot
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if [[ "${SWAP_GB}" -gt 0 ]]; then
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echo "[5b/8] Creating swapfile (${SWAP_GB}G)"
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mkdir -p /mnt/swap
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chattr +C /mnt/swap || true
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fallocate -l "${SWAP_GB}G" /mnt/swap/swapfile
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chmod 600 /mnt/swap/swapfile
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mkswap /mnt/swap/swapfile
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swapon /mnt/swap/swapfile
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fi
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echo "[6/8] Copying flake to /etc/nixos"
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echo "[5/7] Copying flake to /etc/nixos"
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mkdir -p /mnt/etc/nixos
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if command -v rsync >/dev/null 2>&1; then
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rsync -a --exclude '.git' --exclude 'result' --exclude 'node_modules' "${REPO_ROOT}/" /mnt/etc/nixos/
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else
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(cd "${REPO_ROOT}" && tar -cf - --exclude=.git --exclude=result --exclude=node_modules .) | (cd /mnt/etc/nixos && tar -xf -)
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fi
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echo "[7/8] Generating hardware config"
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hardware_file="/mnt/etc/nixos/hosts/${HOSTNAME}-hardware.nix"
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echo "[6/7] Generating hardware config"
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mkdir -p /mnt/etc/nixos/hosts
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nixos-generate-config --root /mnt --show-hardware-config > "${hardware_file}"
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if [[ "$USE_LUKS" -eq 1 || "${SWAP_GB}" -gt 0 ]]; then
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tmpfile=$(mktemp)
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# drop trailing closing brace
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sed '$d' "${hardware_file}" > "${tmpfile}"
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if [[ "$USE_LUKS" -eq 1 ]]; then
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echo " boot.initrd.luks.devices.cryptroot.device = \"${part_root}\";" >> "${tmpfile}"
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fi
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if [[ "${SWAP_GB}" -gt 0 ]]; then
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echo " swapDevices = [ { device = \"/swap/swapfile\"; } ];" >> "${tmpfile}"
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fi
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echo "}" >> "${tmpfile}"
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mv "${tmpfile}" "${hardware_file}"
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fi
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nixos-generate-config --root /mnt --show-hardware-config > "/mnt/etc/nixos/hosts/${HOSTNAME}-hardware.nix"
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host_file="/mnt/etc/nixos/hosts/${HOSTNAME}.nix"
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if [ ! -e "${host_file}" ]; then
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@ -226,9 +54,6 @@ if [ ! -e "${host_file}" ]; then
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inputs.lix-module.nixosModules.lixFromNixpkgs
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../modules/system/base.nix
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../modules/users/admin.nix
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# Uncomment to enable Secure Boot after install:
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# inputs.lanzaboote.nixosModules.lanzaboote
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# ../modules/system/secure-boot.nix
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./${HOSTNAME}-hardware.nix
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];
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@ -237,7 +62,7 @@ if [ ! -e "${host_file}" ]; then
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EOF
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fi
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echo "[8/8] Installing ${HOSTNAME} via flake"
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echo "[7/7] Installing ${HOSTNAME} via flake"
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nixos-install --root /mnt --flake "/mnt/etc/nixos#${HOSTNAME}"
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echo "Install complete. You can reboot now."
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