gistfile1.sh

  abspath() {
    _CWD=$(pwd)
    if [ -d "$1" ]; then
      \cd $1
      echo $(pwd -P)/
    elif [ -f "$1" ]; then
      case $1 in
        */*) \cd ${1%/*};;
      esac
      echo $(pwd -P)/${1##*/}
    else
      echo $1
    fi
    \cd $_CWD
  }