#! /bin/sh
set -efu

# allow wrapper to find tabfs executable
PATH=$(dirname "$0")${PATH:+:$PATH}

if test -n "${TABFS_LOGFILE-}"; then
  logfile=$TABFS_LOGFILE
elif test -n "${XDG_CACHE_HOME-}"; then
  logfile=$XDG_CACHE_HOME/tabfs/log
elif test -n "${HOME-}"; then
  logfile=$HOME/.tabfs/log
else
  logfile=log.txt
fi

mkdir -p "$(dirname "$logfile")"
exec 2>>"$logfile"

if test -n "${TABFS_MOUNTPOINT-}"; then
  mountpoint=$TABFS_MOUNTPOINT
elif test -n "${XDG_RUNTIME_DIR-}"; then
  mountpoint=$XDG_RUNTIME_DIR/tabfs/mnt
elif test -n "${HOME-}"; then
  mountpoint=$HOME/.tabfs/mnt
else
  mountpoint=mnt
fi

pgrep tabfs | grep -v ^$$\$ | xargs kill -9 2>/dev/null || :

OS=$(uname -s)
case $OS in
  Darwin)
    diskutil umount force "$mountpoint" >/dev/null || :
    extraArgs=
    ;;
  FreeBSD)
    umount -f "$mountpoint" 2>/dev/null || :
    extraArgs=
    ;;
  Linux)
    fusermount -u "$mountpoint" 2>/dev/null || :
    extraArgs=-oauto_unmount
    ;;
  *)
    echo "tabfs-wrapper: error: unknown OS: $OS" >&2
    exit 2
esac

mkdir -p "$mountpoint"

exec stdbuf -e0 tabfs -f $extraArgs -odirect_io "$mountpoint"