refactor: remove dead installer/lib/zfs.sh

The library was sourced but only zfs_preflight was reachable from
install_zfs(); the other ten functions either had names that were
never called (create_zfs_datasets, configure_zfs_pacman_hook, etc.)
or were shadowed by same-named definitions in the monolithic
installer/archangel (create_zfs_pool, configure_zfsbootmenu,
configure_zfs_services).

Inlined zfs_preflight into archangel and dropped the source line.
Removes a trap where fixes appear to be "mirrored" but only one
copy actually runs.

2 files changed, 8 insertions, 378 deletions

diff --git a/installer/archangel b/installer/archangel
index 9c6da97..615829d 100755
--- a/installer/archangel
+++ b/installer/archangel
@@ -28,7 +28,6 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 source "$SCRIPT_DIR/lib/common.sh"
 source "$SCRIPT_DIR/lib/config.sh"
 source "$SCRIPT_DIR/lib/disk.sh"
-source "$SCRIPT_DIR/lib/zfs.sh"
 source "$SCRIPT_DIR/lib/btrfs.sh"
 
 #############################
@@ -83,6 +82,14 @@ preflight_checks() {
     require_root
 }
 
+zfs_preflight() {
+    if ! lsmod | grep -q zfs; then
+        info "Loading ZFS module..."
+        modprobe zfs || error "Failed to load ZFS module. Is zfs-linux-lts installed?"
+    fi
+    info "ZFS module loaded successfully."
+}
+
 # Filesystem-specific preflight (called after filesystem is selected)
 filesystem_preflight() {
     if [[ "$FILESYSTEM" == "zfs" ]]; then
diff --git a/installer/lib/zfs.sh b/installer/lib/zfs.sh
deleted file mode 100644
index bf8af35..0000000
--- a/installer/lib/zfs.sh
+++ /dev/null
@@ -1,377 +0,0 @@
-#!/usr/bin/env bash
-# zfs.sh - ZFS-specific functions for archangel installer
-# Source this file after common.sh, config.sh, disk.sh
-
-#############################
-# ZFS Constants
-#############################
-
-POOL_NAME="${POOL_NAME:-zroot}"
-ASHIFT="${ASHIFT:-12}"
-COMPRESSION="${COMPRESSION:-zstd}"
-
-#############################
-# ZFS Pre-flight
-#############################
-
-zfs_preflight() {
-    # Check ZFS module
-    if ! lsmod | grep -q zfs; then
-        info "Loading ZFS module..."
-        modprobe zfs || error "Failed to load ZFS module. Is zfs-linux-lts installed?"
-    fi
-    info "ZFS module loaded successfully."
-}
-
-#############################
-# ZFS Pool Creation
-#############################
-
-create_zfs_pool() {
-    local encryption="${1:-true}"
-    local passphrase="$2"
-
-    step "Creating ZFS Pool"
-
-    # Destroy existing pool if present
-    if zpool list "$POOL_NAME" &>/dev/null; then
-        warn "Pool $POOL_NAME already exists. Destroying..."
-        zpool destroy -f "$POOL_NAME"
-    fi
-
-    # Get root partitions
-    local zfs_parts=()
-    for disk in "${SELECTED_DISKS[@]}"; do
-        zfs_parts+=("$(get_root_partition "$disk")")
-    done
-
-    # Build pool configuration based on RAID level
-    local pool_config
-    if [[ "$RAID_LEVEL" == "stripe" ]]; then
-        pool_config="${zfs_parts[*]}"
-        info "Creating striped pool with ${#zfs_parts[@]} disks (NO redundancy)..."
-        warn "Data loss will occur if ANY disk fails!"
-    elif [[ -n "$RAID_LEVEL" ]]; then
-        pool_config="$RAID_LEVEL ${zfs_parts[*]}"
-        info "Creating $RAID_LEVEL pool with ${#zfs_parts[@]} disks..."
-    else
-        pool_config="${zfs_parts[0]}"
-        info "Creating single-disk pool..."
-    fi
-
-    # Base pool options
-    local pool_opts=(
-        -f
-        -o ashift="$ASHIFT"
-        -o autotrim=on
-        -O acltype=posixacl
-        -O atime=off
-        -O canmount=off
-        -O compression="$COMPRESSION"
-        -O dnodesize=auto
-        -O normalization=formD
-        -O relatime=on
-        -O xattr=sa
-        -O mountpoint=none
-        -R /mnt
-    )
-
-    # Create pool (with or without encryption)
-    if [[ "$encryption" == "false" ]]; then
-        warn "Creating pool WITHOUT encryption"
-        zpool create "${pool_opts[@]}" "$POOL_NAME" $pool_config
-    else
-        info "Creating encrypted pool..."
-        echo "$passphrase" | zpool create "${pool_opts[@]}" \
-            -O encryption=aes-256-gcm \
-            -O keyformat=passphrase \
-            -O keylocation=prompt \
-            "$POOL_NAME" $pool_config
-    fi
-
-    info "ZFS pool created successfully."
-    zpool status "$POOL_NAME"
-}
-
-#############################
-# ZFS Dataset Creation
-#############################
-
-create_zfs_datasets() {
-    step "Creating ZFS Datasets"
-
-    # Root dataset container
-    zfs create -o mountpoint=none -o canmount=off "$POOL_NAME/ROOT"
-
-    # Calculate reservation (20% of pool, capped 5-20G)
-    local pool_size_bytes
-    pool_size_bytes=$(zpool get -Hp size "$POOL_NAME" | awk '{print $3}')
-    local pool_size_gb=$((pool_size_bytes / 1024 / 1024 / 1024))
-    local reserve_gb=$((pool_size_gb / 5))
-    [[ $reserve_gb -gt 20 ]] && reserve_gb=20
-    [[ $reserve_gb -lt 5 ]] && reserve_gb=5
-
-    # Main root filesystem
-    zfs create -o mountpoint=/ -o canmount=noauto -o reservation=${reserve_gb}G "$POOL_NAME/ROOT/default"
-    zfs mount "$POOL_NAME/ROOT/default"
-
-    # Home
-    zfs create -o mountpoint=/home "$POOL_NAME/home"
-    zfs create -o mountpoint=/root "$POOL_NAME/home/root"
-
-    # Media - compression off for already-compressed files
-    zfs create -o mountpoint=/media -o compression=off "$POOL_NAME/media"
-
-    # VMs - 64K recordsize for VM disk images
-    zfs create -o mountpoint=/vms -o recordsize=64K "$POOL_NAME/vms"
-
-    # Var datasets
-    zfs create -o mountpoint=/var -o canmount=off "$POOL_NAME/var"
-    zfs create -o mountpoint=/var/log "$POOL_NAME/var/log"
-    zfs create -o mountpoint=/var/cache "$POOL_NAME/var/cache"
-    zfs create -o mountpoint=/var/lib -o canmount=off "$POOL_NAME/var/lib"
-    zfs create -o mountpoint=/var/lib/pacman "$POOL_NAME/var/lib/pacman"
-    zfs create -o mountpoint=/var/lib/docker "$POOL_NAME/var/lib/docker"
-
-    # /var/tmp - ZFS-backed, persists across reboots, excluded from snapshots
-    zfs create -o mountpoint=/var/tmp -o com.sun:auto-snapshot=false "$POOL_NAME/var/tmp"
-    chmod 1777 /mnt/var/tmp
-
-    # /tmp - tmpfs via fstab (not ZFS: ZFS statx() returns ENOLINK on
-    # systemd PrivateTmp paths, breaking systemd-tmpfiles-clean every boot)
-    mkdir -p /mnt/tmp
-    chmod 1777 /mnt/tmp
-
-    info "Datasets created:"
-    zfs list -r "$POOL_NAME" -o name,mountpoint,compression
-}
-
-#############################
-# ZFSBootMenu Configuration
-#############################
-
-configure_zfsbootmenu() {
-    step "Configuring ZFSBootMenu"
-
-    # Ensure hostid exists
-    if [[ ! -f /etc/hostid ]]; then
-        zgenhostid
-    fi
-    local host_id
-    host_id=$(hostid)
-
-    # Copy hostid to installed system
-    cp /etc/hostid /mnt/etc/hostid
-
-    # Create ZFSBootMenu directory on EFI
-    mkdir -p /mnt/efi/EFI/ZBM
-
-    # Download ZFSBootMenu release EFI binary
-    info "Downloading ZFSBootMenu..."
-    local zbm_url="https://get.zfsbootmenu.org/efi"
-    if ! curl -fsSL -o /mnt/efi/EFI/ZBM/zfsbootmenu.efi "$zbm_url"; then
-        error "Failed to download ZFSBootMenu"
-    fi
-    info "ZFSBootMenu binary installed."
-
-    # Set kernel command line on the ROOT PARENT dataset
-    local cmdline="rw loglevel=3"
-
-    # Add AMD GPU workarounds if needed
-    if lspci | grep -qi "amd.*display\|amd.*vga"; then
-        info "AMD GPU detected - adding workaround parameters"
-        cmdline="$cmdline amdgpu.pg_mask=0 amdgpu.cwsr_enable=0"
-    fi
-
-    zfs set org.zfsbootmenu:commandline="$cmdline" "$POOL_NAME/ROOT"
-    info "Kernel command line set on $POOL_NAME/ROOT"
-
-    # Set bootfs property
-    zpool set bootfs="$POOL_NAME/ROOT/default" "$POOL_NAME"
-    info "Default boot filesystem set to $POOL_NAME/ROOT/default"
-
-    # Create EFI boot entries for each disk
-    local zbm_cmdline="spl_hostid=0x${host_id} zbm.timeout=3 zbm.prefer=${POOL_NAME} zbm.import_policy=hostid"
-
-    for i in "${!SELECTED_DISKS[@]}"; do
-        local disk="${SELECTED_DISKS[$i]}"
-        local label="ZFSBootMenu"
-        if [[ ${#SELECTED_DISKS[@]} -gt 1 ]]; then
-            label="ZFSBootMenu-disk$((i+1))"
-        fi
-
-        info "Creating EFI boot entry: $label on $disk"
-        efibootmgr --create \
-            --disk "$disk" \
-            --part 1 \
-            --label "$label" \
-            --loader '\EFI\ZBM\zfsbootmenu.efi' \
-            --unicode "$zbm_cmdline" \
-            --quiet
-    done
-
-    # Set as primary boot option
-    local bootnum
-    bootnum=$(efibootmgr | grep "ZFSBootMenu" | head -1 | grep -oP 'Boot\K[0-9A-F]+')
-    if [[ -n "$bootnum" ]]; then
-        local current_order
-        current_order=$(efibootmgr | grep "BootOrder" | cut -d: -f2 | tr -d ' ')
-        efibootmgr --bootorder "$bootnum,$current_order" --quiet
-        info "ZFSBootMenu set as primary boot option"
-    fi
-
-    info "ZFSBootMenu configuration complete."
-}
-
-#############################
-# ZFS Services
-#############################
-
-configure_zfs_services() {
-    step "Configuring ZFS Services"
-
-    arch-chroot /mnt systemctl enable zfs.target
-    arch-chroot /mnt systemctl disable zfs-import-cache.service
-    arch-chroot /mnt systemctl enable zfs-import-scan.service
-    arch-chroot /mnt systemctl enable zfs-mount.service
-    arch-chroot /mnt systemctl enable zfs-import.target
-
-    # Disable cachefile - we use zfs-import-scan
-    zpool set cachefile=none "$POOL_NAME"
-    rm -f /mnt/etc/zfs/zpool.cache
-
-    info "ZFS services configured."
-}
-
-#############################
-# Pacman Snapshot Hook
-#############################
-
-configure_zfs_pacman_hook() {
-    step "Configuring Pacman Snapshot Hook"
-
-    mkdir -p /mnt/etc/pacman.d/hooks
-
-    cat > /mnt/etc/pacman.d/hooks/zfs-snapshot.hook << EOF
-[Trigger]
-Operation = Upgrade
-Operation = Install
-Operation = Remove
-Type = Package
-Target = *
-
-[Action]
-Description = Creating ZFS snapshot before pacman transaction...
-When = PreTransaction
-Exec = /usr/local/bin/zfs-pre-snapshot
-EOF
-
-    cat > /mnt/usr/local/bin/zfs-pre-snapshot << 'EOF'
-#!/bin/bash
-POOL="zroot"
-DATASET="$POOL/ROOT/default"
-LOCKFILE="/run/zfs-pre-snapshot.lock"
-MIN_INTERVAL=60
-
-# Dedup bursts of back-to-back pacman transactions (e.g. archsetup runs)
-# into a single snapshot. Lockfile on tmpfs — clears on reboot.
-if [ -f "$LOCKFILE" ]; then
-    last=$(stat -c %Y "$LOCKFILE" 2>/dev/null || echo 0)
-    now=$(date +%s)
-    if (( now - last < MIN_INTERVAL )); then
-        exit 0
-    fi
-fi
-
-TIMESTAMP=$(date +%Y-%m-%d_%H-%M-%S)
-SNAPSHOT_NAME="pre-pacman_$TIMESTAMP"
-
-if zfs snapshot "$DATASET@$SNAPSHOT_NAME"; then
-    echo "Created snapshot: $DATASET@$SNAPSHOT_NAME"
-    touch "$LOCKFILE"
-else
-    echo "Warning: Failed to create snapshot" >&2
-fi
-EOF
-
-    chmod +x /mnt/usr/local/bin/zfs-pre-snapshot
-    info "Pacman hook configured."
-}
-
-#############################
-# ZFS Tools
-#############################
-
-install_zfs_tools() {
-    step "Installing ZFS Management Tools"
-
-    # Copy ZFS management scripts
-    cp /usr/local/bin/zfssnapshot /mnt/usr/local/bin/zfssnapshot
-    cp /usr/local/bin/zfsrollback /mnt/usr/local/bin/zfsrollback
-    chmod +x /mnt/usr/local/bin/zfssnapshot
-    chmod +x /mnt/usr/local/bin/zfsrollback
-
-    info "ZFS management scripts installed: zfssnapshot, zfsrollback"
-}
-
-#############################
-# EFI Sync (Multi-disk)
-#############################
-
-sync_zfs_efi_partitions() {
-    local efi_parts=()
-    for disk in "${SELECTED_DISKS[@]}"; do
-        efi_parts+=("$(get_efi_partition "$disk")")
-    done
-
-    # Skip if only one disk
-    [[ ${#efi_parts[@]} -le 1 ]] && return
-
-    step "Syncing EFI partitions for redundancy"
-
-    for ((i=1; i<${#efi_parts[@]}; i++)); do
-        local secondary="${efi_parts[$i]}"
-        local tmp_mount="/tmp/efi_sync_$$"
-
-        mkdir -p "$tmp_mount"
-        mount "$secondary" "$tmp_mount"
-        rsync -a /mnt/efi/ "$tmp_mount/"
-        umount "$tmp_mount"
-        rmdir "$tmp_mount"
-
-        info "Synced EFI to $secondary"
-    done
-}
-
-#############################
-# Genesis Snapshot
-#############################
-
-create_zfs_genesis_snapshot() {
-    step "Creating Genesis Snapshot"
-
-    local snapshot_name="genesis"
-    zfs snapshot -r "$POOL_NAME@$snapshot_name"
-
-    info "Genesis snapshot created: $POOL_NAME@$snapshot_name"
-    info "You can restore to this point anytime with: zfsrollback $snapshot_name"
-}
-
-#############################
-# ZFS Cleanup
-#############################
-
-zfs_cleanup() {
-    step "Cleaning up ZFS"
-
-    # Unmount all ZFS datasets
-    zfs unmount -a 2>/dev/null || true
-
-    # Unmount EFI
-    umount /mnt/efi 2>/dev/null || true
-
-    # Export pool (important for clean import on boot)
-    zpool export "$POOL_NAME"
-
-    info "ZFS pool exported cleanly."
-}