xtirp

#!/bin/sh

set -e

if ! command -v bsdtar >/dev/null 2>&1; then
  echo "Do yourself a favor, install bsdtar(1)" >&2
  exit 1
fi

__usage() {
  cat << EOH
$0 archive [dest]

Deflate an archive using bsdtar(1):

% $0 ~/something/far/foo.zip
% ls
foo/
EOH
}

case "$1" in
  -h) __usage && exit 0 ;;
  *.tar.??|*.tar.???) dest="${1%.*}";; # Tar archive have a double extension
esac

[ -z "$1" ] && __usage >&2 && exit 1

if [ -z "$2" ]; then
  : "${dest:="$1"}"
  dest="${dest%.*}"
  dest="${dest##*/}"
else
  dest="$2"
fi

! [ -e "$dest" ] && mkdir "$dest"

case "$1" in
  # RAR truly is a PITA
  *.rar) cd "$dest" && unrar x "$1" ;;
  *)     bsdtar xvf "$1" -C "$dest" ;;
esac