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lpp_relpath.sh
76 lines | 2.9 KiB | application/x-sh | BashLexer
#!/bin/bash
#"======================================================================================="
#"---------------------------------------------------------------------------------------"
#" LPP VHDL lib makeDirs "
#" Copyright (C) 2010 Laboratory of Plasmas Physic. "
#"======================================================================================="
#----------------------------------------------------------------------------------------
# This file is a part of the LPP VHDL IP LIBRARY
# Copyright (C) 2010, Laboratory of Plasmas Physic - CNRS
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#----------------------------------------------------------------------------------------
function fullpath() {
if test $# -gt 0
then
cd $1
echo `pwd`
fi
}
function relpath() {
if test $# -gt 1
then
source=`fullpath $1`
target=`fullpath $2`
common_part=$source # for now
result="" # for now
while [[ "${target#$common_part}" == "${target}" ]]; do
# no match, means that candidate common part is not correct
# go up one level (reduce common part)
common_part="$(dirname $common_part)"
# and record that we went back, with correct / handling
if [[ -z $result ]]; then
result=".."
else
result="../$result"
fi
done
if [[ $common_part == "/" ]]; then
# special case for root (no common path)
result="$result/"
fi
# since we now have identified the common part,
# compute the non-common part
forward_part="${target#$common_part}"
# and now stick all parts together
if [[ -n $result ]] && [[ -n $forward_part ]]; then
result="$result$forward_part"
elif [[ -n $forward_part ]]; then
# extra slash removal
result="${forward_part:1}"
fi
echo $result
fi
}
PATH1=`pwd`
echo `relpath $PATH1 $GRLIB`