#!/bin/bash

# Written by Nick Boldt, codeslave@ca.ibm.com
# $Id: lspathseg.txt,v 1.1 2006-11-24 19:34:17 nickb Exp $

# given a dir like /var/www/download.eclipse.org/htdocs/tools/emf
# return .../htdocs/tools/emf for numsegs = 3

if [ "$(pwd)" = "/" ]; then
  echo "/";
else
  # get current dir
  dir=$(pwd); 

  # collect commandline option (number of segments) or default 3
  if [ "x$1" != "x" ]; then
    maxsegs=$1;
  else
    maxsegs=3;
  fi

  # calculate reduced path 
  segs="";
  while [ $maxsegs -gt 0 ]; do
    newseg=${dir##*/};
    if [ "x$newseg" != "x" ]; then
      segs="/"${dir##*/}$segs;
    fi
    dir=${dir%/*};
    (( maxsegs-- ));
  done

  # return result
  if [ "$segs" != "$(pwd)" ]; then 
    echo "..."$segs;
  else
    echo $(pwd);
  fi
fi