#!/usr/bin/env sh
# mkfs-root.sh — format/seed the target root for the chosen filesystem
# Usage: mkfs-root.sh [ext4|btrfs|xfs|zfs|f2fs]
. "$(dirname "$0")/common.sh"

FS="${1:-ext4}"

# Keru builds to a plain directory staged by Kama; the filesystem choice is
# applied at install/flash time. This script writes the fstab + initramfs
# config so the built system knows how to mount its own root.
ROOT="${ROOT:-/tmp/keru/root}"
case "$FS" in
    ext4)  FSTYPE=ext4; MK="mkfs.ext4" ;;
    btrfs) FSTYPE=btrfs; MK="mkfs.btrfs" ;;
    xfs)   FSTYPE=xfs; MK="mkfs.xfs" ;;
    zfs)   FSTYPE=zfs; MK="zpool" ;;
    f2fs)  FSTYPE=f2fs; MK="mkfs.f2fs" ;;
    *) die "unsupported filesystem: $FS" ;;
esac
info "target filesystem: $FSTYPE ($MK)"

# drop fstab template
mkdir -p "$ROOT/etc"
cat > "$ROOT/etc/fstab" <<EOF
# Keru generated fstab — root filesystem: $FSTYPE
# /dev/ROOT / $FSTYPE rw,relatime 0 1
EOF
info "wrote fstab for $FSTYPE"