#!/bin/sh -e
# Mount a partition by label or device identifier automatically
test "$1" = "--help" && echo "$0 <device> [mountpoint] [options...]" && exit 0
if test "$1" = "-u"
then shift
  mountpoint=$(test -d "$1" && echo "$1" || echo "${XDG_RUNTIME_DIR}/mnt/$1")
  sudo umount "$mountpoint"
  code=$?
  sudo rm -d "$mountpoint"
  exit $?
fi

grep -e "[^\w=/]$1[^\w/]" /etc/fstab && mount "$@" && exit 0
case "$1" in
  (sd*|loop*|nvme*|md*|dm*|vg*) partition="/dev/$1"
    mountpoint="${2:-${MNT:-${XDG_RUNTIME_DIR}/mnt}/$1}"
    grep -e "[^\w=/]$mountpoint[^\w/]" /etc/fstab && shift && mount "$mountpoint" "$@" && exit 0;;
  (*) partition="-L $1";;
esac
shift $(expr 2 \& $# \> 1 \| 1)
#uid=$(id --user),gid=$(id --group), \
mountpoint "$mountpoint" >/dev/null 2>&1 || sudo mount -vo \
  users,X-mount.mkdir,noatime $partition $mountpoint "$@"
cd $mountpoint
exec $SHELL