.bashrc.pathclean

function pathclean() {
  # Variable Declarations
  local -a newpathcomps     # Array of new path components
  local -i alreadyseen      # Have we already seen this component?
  local component           # Current component we're looking at
  local -i i                # loop var
  local thevar=$1           # The NAME of the variable we're cleaning

  # Clean up the PATH
  # Expunge double /s and make : into a space. Unfortunatly, this breaks
  # on path entries with a space in them, as happens in the cygwin
  # environment with the fabulous "Program Files" directory, so we have
  # to kludge them into | and then back again...
  for component in $(echo "${!thevar}" |
		      sed -e 's/ /|/g' -e 's/:/ /g' -e 's#//#/#g')
  do
      if [[ -d ${component//|/ } ]]; then
	  # The directory exists, lets check we haven't already seen it
	  alreadyseen=0
	  i=0
	  while (( "$i" < ${#newpathcomps[*]} )); do
	      if [[ ${newpathcomps[i]} == "$component" ]]; then
		  alreadyseen=1
		  break
	      fi
	      (( i = i + 1 ))
	  done
	  if (( ! alreadyseen )); then
	      newpathcomps[i]=$component
	  fi
      fi
  done
  # I'm just not game to wrap this line!
  eval "$thevar=\"$(echo "${newpathcomps[*]}" | sed -e's/ /:/g' -e 's/|/ /g')\""
}

pathclean PATH
pathclean MANPATH
# pathclean LD_LIBRARY_PATH

export PATH MANPATH #LD_LIBRARY_PATH