#!/bin/sh
#
# This script transforms the dxs project files to debians
# binary package format .deb

DEBUG=0
# This function makes the directory of this script to the present working directory
# It is called within precheck()
# Does also work when called by symbolic links (even for nested links). 
goto_script_dir()
{
  [ $DEBUG -ge 2 ] && echo "Aufgerufen wurde $0, checking if it is a link"
  calleddetails=`ls -l $0` # get the file flags (e.g. lrwxrwxrwx)
  [ $DEBUG -ge 2 ] && echo $calleddetails
  
  calleddir=${0%/*}  # Strip the filename from path
  [ $DEBUG -ge 2 ] && echo "Wechsele ins Verzeichnis des aufgerufenen scripts/links ($calleddir)"
  cd $calleddir
 
  while index=`expr index "$calleddetails" "l"`; 
        [ $index -eq 1 ]; do

    [ $DEBUG -ge 2 ] && echo "It is a link"
    target=`echo $calleddetails | awk '{print $NF}'`
    [ $DEBUG -ge 2 ] && echo "The target of the link is: $target"
    hasslash=`expr index "$target" "/"`
    if [ $hasslash -ne 0 ]; then 
        targetpath=${target%/*} # extract the pathname
        [ $DEBUG -ge 2 ] && echo "Following link to $targetpath"
        cd $targetpath
    else
        [ $DEBUG -ge 2 ] && echo "It is in the same directory as the link"
    fi
    targetfile=`basename $target`
    [ $DEBUG -ge 2 ] && echo "The target file of the link is: $targetfile"
    calleddetails=`ls -l $targetfile` # get the file flags (e.g. lrwxrwxrwx)
    [ $DEBUG -ge 2 ] && echo $calleddetails
  done
  [ $DEBUG -ge 2 ] && pwd

}
dpkg_deb=`which dpkg-deb`
if [ -z "$dpkg_deb" ];then 
    echo "You need the program dpkg-deb (contained in package dpkg) to build a debian package"
    exit
fi

goto_script_dir
#Create Temporary working directory
mkdir -p /tmp/ld$$/usr/share/dxs
mkdir -p /tmp/ld$$/usr/sbin
mkdir -p /tmp/ld$$/usr/share/man/man1
mkdir -p /tmp/ld$$/usr/share/doc/dxs
mkdir -p /tmp/ld$$/DEBIAN
cp default_files/control  /tmp/ld$$/DEBIAN/
cp default_files/prerm    /tmp/ld$$/DEBIAN/
cp default_files/postinst /tmp/ld$$/DEBIAN/
cp default_files/mkdxsinitrd.1.gz /tmp/ld$$/usr/share/man/man1/

#Goto project root
pushd .. > /dev/null
#copy all relevant file to a tar archive (can't use xargs with cp)
find -type f| grep -v /\.svn | grep -v \#.*\# | grep ^\./in | grep -v ~$ | xargs tar rf /tmp/ld$$/usr/share/dxs/tmp.tar
#extract it
pushd /tmp/ld$$/usr/share/dxs > /dev/null
tar xf tmp.tar
rm tmp.tar

#Create links to provide the scripts to the user
pushd /tmp/ld$$/usr/sbin > /dev/null
ln -s ../share/dxs/installer/ld4-inst
ln -s ../share/dxs/initrd/mkdxsinitrd


#Set permissions
find /tmp/ld$$ -type d|xargs chmod 755

#Create the package
dpkg-deb --build /tmp/ld$$ > /dev/null
#And bring the package back to the dir of this script
popd > /dev/null
popd > /dev/null
popd > /dev/null
mv /tmp/ld$$.deb ./dxs.deb
#rm -rf /tmp/ld$$
echo "Written './dxs.deb'"