#!/bin/sh

#
# this script will unpack and install the xop files
# the installation can also be done manually.
#

#
# step 1 ask for user input
#
RESP=0
DIR_FROM=`pwd`
echo "please type full directory path where the downloaded files can be found "
echo "  (default: $DIR_FROM) <?>"
read RESP
if [ "$RESP" != "" ]; then
  DIR_FROM=$RESP
fi
DIR_TO=$HOME/xop
echo "please type full directory path xop will be installed "
echo " (default:  $DIR_TO) <?>"
read RESP
if [ "$RESP" != "" ]; then
  DIR_TO=$RESP
fi
if test ! -d $DIR_TO; then
  echo "Directory $DIR_TO not found. Create it [<enter>Yes, 0=No]?"
  read RESP
  if [ "$RESP" != "" ]; then
    echo "xop_unpack aborted."
    exit 1
  fi
  mkdir $DIR_TO
  if test $? -ne 0; then
    echo "ERROR: Problem creating $DIR_TO"
    echo "xop_unpack aborted."
    exit 1
  fi
fi


echo "please type the installation key [obtained by email from srio@esrf.fr] <?>"
read RESP
CRYPT_KEY=$RESP

echo "**********************************************"
echo "Starting unpacking with the following inputs: "
echo "    Directory with downloaded files: $DIR_FROM"
echo "    Directory where xop will be installed (=xop home dir): $DIR_TO"
echo "    Decrypting key: $CRYPT_KEY"
echo "**********************************************"
echo "Type <Enter> to proceed, 0 to to exit <?>"
read RESP
if [ "$RESP" != "" ]; then
  echo "xop_unpack aborted."
  exit 1
fi 

echo "Changing directory to $DIR_TO"
cd $DIR_TO
#
# step 2 decrypt and unpack crypted files
#
FILES=`echo $DIR_FROM/*.encrypted`
if [ "$FILES" != '$DIR_FOM/*.encrypted' ]; then
  echo " encripted files: $FILES"
  for ifile in $FILES; do
    echo "decrypting file $ifile using command \
    crypt $CRYPT_KEY < $ifile > tmp.tar.Z "
    /bin/rm -f tmp.tar.Z
    crypt $CRYPT_KEY < $ifile > tmp.tar.Z 
    if [ $? != 0 ]; then
      echo "error decrypting."
      exit 1
    fi
    echo "unpacking file $ifile"
    zcat tmp.tar.Z | tar xvf -
    if [ $? != 0 ]; then
      echo "error unpacking."
      exit 1
    fi
    echo "done for $ifile (`date`)."
  done
fi

#
# step 3 unpack tar files
#
FILES=`echo $DIR_FROM/*.Z`
if [ "$FILES" != '$DIR_FOM/*.Z' ]; then
  echo " encripted files: $FILES"
  for ifile in $FILES; do
    echo "unpacking file $ifile (`date`)..."
    zcat $ifile | tar xvf -
    if [ $? != 0 ]; then
      echo "error unpacking."
      exit 1
    fi
    echo "done for $ifile (`date`)."
  done
fi

#
# step 4 Edit the xop file and place the right dir in $XOP_HOME
#
echo "**********************************************"
echo "Unpacking finished." 
echo "    Now the file xop will be changed to reflect the installation"
echo "    directory. The original xop file will be copied to xop-orig."
echo "**********************************************"
echo "Type <Enter> to proceed, 0 to to exit <?>"
read RESP
if [ "$RESP" != "" ]; then
  echo "xop_unpack exited without changing xop."
  exit 1
fi 

/bin/rm -f tmp.tmp tmp.tmp2
echo $DIR_TO > tmp.tmp
sed 's/\//\\\//g' tmp.tmp > tmp.tmp2
DIR_TO2=`cat tmp.tmp2`
echo "original xop file copied to xop-orig"
cp xop xop-orig
/bin/rm -f xop
SUBSTITUTE="s/\/pgexp\/applications1\/XRayOptics\/xop/$DIR_TO2/"
sed $SUBSTITUTE xop-orig > xop
chmod 755 xop
/bin/rm -f tmp.tmp tmp.tmp2 tmp.tar.Z

#
# step 5 Exit
#
echo "Procedute completed. You may start xop by typing $DIR_TO/xop"
exit 0;