relpath

   1 #! /bin/sh
   2
   3 # Conversion of an absolute path to a relative path.
   4
   5 # Copyright (c) 2008 by Marc Feeley, All Rights Reserved.
   6
   7 TARGET_PATH=`echo "$1" | sed -e 's#\\\\#/#g' -e 's#//*#/#g' -e 's#/$##' -e 's#\([/]\{0,1\}\)\(.*\)#\2/#' -e 's#^/$##'`
   8 ORIG_DIR=`echo "$2" | sed -e 's#\\\\#/#g' -e 's#//*#/#g' -e 's#/$##' -e 's#\([/]\{0,1\}\)\(.*\)#\2/#' -e 's#^/$##'`
   9 ENABLE_MV="$3"
  10
  11 while test "$TARGET_PATH" != "" -a "$ORIG_DIR" != ""; do
  12   TP_CAR=`echo "$TARGET_PATH" | sed -e 's#\([^/]*[/]\)\(.*\)#\1#'`
  13   TP_CDR=`echo "$TARGET_PATH" | sed -e 's#\([^/]*[/]\)\(.*\)#\2#'`
  14   OD_CAR=`echo "$ORIG_DIR" | sed -e 's#\([^/]*[/]\)\(.*\)#\1#'`
  15   OD_CDR=`echo "$ORIG_DIR" | sed -e 's#\([^/]*[/]\)\(.*\)#\2#'`
  16   if test "$TP_CAR" = "$OD_CAR"; then
  17     TARGET_PATH="$TP_CDR"
  18     ORIG_DIR="$OD_CDR"
  19   else
  20     break
  21   fi
  22 done
  23
  24 REL_PATH=`echo "$ORIG_DIR" | sed -e 's#[^/]*[/]#../#g'`"$TARGET_PATH"
  25
  26 if test "$ENABLE_MV" = "yes"; then
  27   echo "$REL_PATH" | sed -e 's#^#/#' -e 's#^\(.*/\)\([^/][^/]*\)/\([^/][^/]*\)/$#\1current/\3/#' -e 's#^/##'
  28 else
  29   echo "$REL_PATH"
  30 fi