231 lines
8.6 KiB
Bash
231 lines
8.6 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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# ────────────────────────────────────────────────────────────────
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# Solphyr Arch Linux Auto-Installer
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# Full LUKS2 encryption • systemd-boot • yay • WireGuard • Hardening
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# ────────────────────────────────────────────────────────────────
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# Colour helpers
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b=$(tput bold); r=$(tput sgr0); g=$(tput setaf 2); y=$(tput setaf 3); c=$(tput setaf 6); e=$(tput setaf 1)
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info(){ echo "${c}==>${r} $*"; }
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warn(){ echo "${y}!${r} $*"; }
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die(){ echo "${e}x${r} $*" >&2; exit 1; }
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NO_PROMPT=0
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[[ "${1:-}" =~ (--no-prompt|--auto) ]] && NO_PROMPT=1
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# ── Load or create .env ─────────────────────────────────────────
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[[ ! -f .env ]] && { warn ".env missing, creating from template"; cp .env.template .env 2>/dev/null || touch .env; }
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source .env || true
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# ── Safe prompting helpers ─────────────────────────────────────
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# --- Safe prompting helpers ---
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prompt_var() {
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local var_name="$1"
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local prompt_text="$2"
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local default_val
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default_val="$(eval "echo \${$var_name:-}")"
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if [[ "$NO_PROMPT" == "1" ]]; then
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info "Using $var_name=$default_val"
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return 0
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fi
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local input
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# disable errexit for the read itself
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set +e
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read -e -p "$prompt_text [${default_val}]: " input
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local rc=$?
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set -e
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[[ $rc -ne 0 ]] && die "Input cancelled"
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if [[ -n "$input" ]]; then
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eval "$var_name=\"\$input\""
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fi
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return 0
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}
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prompt_secret() {
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local var_name="$1"
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local prompt_text="$2"
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local default_val
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default_val="$(eval "echo \${$var_name:-}")"
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if [[ -z "$default_val" ]]; then
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set +e
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read -s -p "$prompt_text: " input
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local rc=$?
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set -e
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echo
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[[ $rc -ne 0 ]] && die "Input cancelled"
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eval "$var_name=\"\$input\""
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else
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info "Using $var_name from .env"
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fi
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return 0
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}
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save_env() {
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local var_name="$1"
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local var_value
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var_value="$(eval "echo \${$var_name}")"
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sed -i "/^${var_name}=/d" .env
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echo "${var_name}=\"${var_value}\"" >> .env
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return 0
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}
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# ── Gather configuration ────────────────────────────────────────
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prompt_var HOSTNAME "Hostname"; prompt_var USERNAME "Username"
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prompt_var KEYMAP "Keymap"; prompt_var TIMEZONE "Timezone"; prompt_var LOCALE "Locale"
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save_env HOSTNAME; save_env USERNAME; save_env KEYMAP; save_env TIMEZONE; save_env LOCALE
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# ── Networking ─────────────────────────────────────────────────
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timedatectl set-ntp true
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if [[ -z "$(ip link | grep -E 'state UP')" ]]; then
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warn "No active network found"
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prompt_var WIFI_SSID "Wi-Fi SSID"; prompt_secret WIFI_PASS "Wi-Fi password"
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iwctl station wlan0 scan || true
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iwctl station wlan0 connect "$WIFI_SSID" --passphrase "$WIFI_PASS" || die "Wi-Fi connection failed"
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else info "Network detected"; fi
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# ── Disk selection ─────────────────────────────────────────────
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if [[ -z "${DISK:-}" ]]; then
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info "Available disks:"; lsblk -dno NAME,SIZE,MODEL | grep -v loop | nl -w2 -s'. '
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[[ $NO_PROMPT == 1 ]] && die "No DISK specified in .env"
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read -p "Select disk number: " n; DISK="/dev/$(lsblk -dno NAME | grep -v loop | sed -n "${n}p")"
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fi; save_env DISK
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EFI="${DISK}p1"; ROOT="${DISK}p2"
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read -p "${e}${b}⚠️ Erase $DISK? ENTER to confirm${r}"
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# ── Partition + encryption ─────────────────────────────────────
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sgdisk --zap-all "$DISK"
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sgdisk -n1:0:+1G -t1:ef00 -c1:"EFI System" "$DISK"
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sgdisk -n2:0:0 -t2:8300 -c2:"Linux LUKS" "$DISK"; partprobe "$DISK"
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prompt_secret LUKS_PASSWORD "LUKS password"; save_env LUKS_PASSWORD
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echo -n "$LUKS_PASSWORD" | cryptsetup luksFormat --batch-mode --type luks2 \
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--cipher aes-xts-plain64 --key-size 512 --hash sha512 "$ROOT" -
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echo -n "$LUKS_PASSWORD" | cryptsetup open "$ROOT" cryptroot -
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mkfs.fat -F32 "$EFI"; mkfs.ext4 /dev/mapper/cryptroot
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mount /dev/mapper/cryptroot /mnt; mkdir /mnt/boot; mount "$EFI" /mnt/boot
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# ── Mirrors + base system ──────────────────────────────────────
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pacman -Sy --noconfirm reflector
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reflector --country "United Kingdom" --latest 20 --sort rate --save /etc/pacman.d/mirrorlist
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pacstrap -K /mnt base linux linux-firmware vim networkmanager sudo base-devel git
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genfstab -U /mnt >> /mnt/etc/fstab
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# ── System configuration inside chroot ─────────────────────────
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arch-chroot /mnt /bin/bash <<CHROOT
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set -euo pipefail
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ln -sf /usr/share/zoneinfo/$TIMEZONE /etc/localtime
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hwclock --systohc
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sed -i "s/^#${LOCALE}/${LOCALE}/" /etc/locale.gen
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locale-gen
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echo "LANG=$LOCALE" > /etc/locale.conf
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echo "$HOSTNAME" > /etc/hostname
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cat <<EOF >/etc/hosts
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127.0.0.1 localhost
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::1 localhost
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127.0.1.1 $HOSTNAME.localdomain $HOSTNAME
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EOF
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echo "KEYMAP=$KEYMAP" > /etc/vconsole.conf
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sed -i 's/\(filesystems\)/encrypt \1/' /etc/mkinitcpio.conf
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mkinitcpio -P
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bootctl install
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# Fix insecure permissions from FAT32
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chmod 600 /boot/loader/random-seed 2>/dev/null || true
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chmod 700 /boot/loader 2>/dev/null || true
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chmod 700 /boot/EFI/systemd 2>/dev/null || true
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chown -R root:root /boot /boot/EFI || true
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UUID=\$(blkid -s UUID -o value ${ROOT})
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cat <<EOF >/boot/loader/loader.conf
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default arch.conf
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timeout 3
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console-mode max
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editor no
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EOF
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cat <<EOF >/boot/loader/entries/arch.conf
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title Arch Linux
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linux /vmlinuz-linux
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initrd /initramfs-linux.img
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options cryptdevice=UUID=\${UUID}:cryptroot root=/dev/mapper/cryptroot rw
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EOF
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# Create user but skip passwords (set later outside heredoc)
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useradd -m -G wheel -s /bin/bash $USERNAME
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sed -i 's/^# %wheel ALL=(ALL:ALL) ALL/%wheel ALL=(ALL:ALL) ALL/' /etc/sudoers
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systemctl enable NetworkManager
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# yay (AUR helper)
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if [[ "${INSTALL_YAY,,}" == "yes" ]]; then
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pacman -S --noconfirm base-devel git go
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su - "$USERNAME" -c '
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set -e
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cd /tmp
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git clone https://aur.archlinux.org/yay.git
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cd yay
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makepkg -si --noconfirm
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cd
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rm -rf /tmp/yay
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'
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fi
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# Hardening
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if [[ "${ENABLE_HARDENING,,}" == "yes" ]]; then
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pacman -Sy --noconfirm ufw apparmor fail2ban archlinux-keyring
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systemctl enable ufw; systemctl start ufw
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ufw default deny incoming; ufw default allow outgoing; ufw enable
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systemctl enable apparmor; systemctl enable fail2ban
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cat <<EOF >/etc/sysctl.d/99-hardening.conf
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net.ipv4.conf.all.accept_redirects = 0
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net.ipv6.conf.all.accept_redirects = 0
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net.ipv4.conf.all.send_redirects = 0
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net.ipv4.conf.all.accept_source_route = 0
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net.ipv6.conf.all.accept_source_route = 0
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net.ipv4.tcp_syncookies = 1
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net.ipv4.icmp_echo_ignore_broadcasts = 1
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net.ipv4.icmp_ignore_bogus_error_responses = 1
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kernel.randomize_va_space = 2
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EOF
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sysctl --system
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echo 'Defaults timestamp_timeout=5' > /etc/sudoers.d/hardening
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fi
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CHROOT
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# ── Interactive password setup (outside heredoc) ───────────────
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info "Set root password"
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until arch-chroot /mnt passwd; do echo "Try again."; done
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info "Set password for user ${USERNAME}"
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until arch-chroot /mnt passwd "${USERNAME}"; do echo "Try again."; done
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# ── WireGuard (optional) ────────────────────────────────────────
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if [[ "${ENABLE_WIREGUARD,,}" == "yes" && -f "${WIREGUARD_CONF_PATH}" ]]; then
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info "Installing WireGuard..."
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install -Dm600 "$WIREGUARD_CONF_PATH" "/mnt/etc/wireguard/wg0.conf"
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arch-chroot /mnt pacman -Sy --noconfirm wireguard-tools
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arch-chroot /mnt systemctl enable wg-quick@wg0.service
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else
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warn "WireGuard skipped (no config or disabled)."
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fi
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# ── Finish ─────────────────────────────────────────────────────
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umount -R /mnt
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cryptsetup close cryptroot
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info "Installation complete"
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cat <<EOF
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${g}${b}✅ Arch Linux installation complete!${r}
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Remove installation media and reboot:
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${b}reboot${r}
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Then log in as '${USERNAME}' and pull your next setup, e.g.:
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${c}wget https://your.gitea.instance/raw/setup_dev_env.sh && bash setup_dev_env.sh${r}
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EOF
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