#!/bin/sh
#
# This script transforms the openslx 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
if [ ! -e ./Makefile ]; then
    echo "There is no makefile in this programs directory (`pwd`)."
    echo "Please run this script only embedded in the context of an openslx installation"
    exit
fi
# Manipulate the Path, make installs to, by placing it into a temporary directory
mkdir -p /tmp/ld$$
export USR_BIN_PATH="/tmp/ld$$/usr/bin"
export SLX_CONFIG_PATH="/tmp/ld$$/etc/opt/openslx"
export SLX_BASE_PATH="/tmp/ld$$/opt/openslx"
export SLX_BIN_PATH="${SLX_BASE_PATH}/bin"
export SLX_SHARE_PATH="${SLX_BASE_PATH}/share"
export SLX_VMWARE_PATH="${SLX_BASE_PATH}/vmware"
export SLX_PRIVATE_PATH="/tmp/ld$$/var/opt/openslx"
export SLX_PUBLIC_PATH="/tmp/ld$$/srv/openslx"
export SLX_EXPORT_PATH="${SLX_PUBLIC_PATH}/export"
export SLX_TFTPBOOT_PATH="${SLX_PUBLIC_PATH}/tftpboot"
export SLX_TEMP_PATH="/tmp/ld$$/tmp"
export SLX_INSTALL_LOG="packaging.log"
mkdir -p $USR_BIN_PATH
mkdir -p $SLX_CONFIG_PATH
mkdir -p $SLX_BASE_PATH
mkdir -p $SLX_BIN_PATH
mkdir -p $SLX_SHARE_PATH
mkdir -p $SLX_VMWARE_PATH
mkdir -p $SLX_PRIVATE_PATH
mkdir -p $SLX_PUBLIC_PATH
mkdir -p $SLX_EXPORT_PATH
mkdir -p $SLX_TFTPBOOT_PATH
mkdir -p $SLX_TEMP_PATH

#Now "make install" installs the slx software to /tmp/ld$$
if make install; then
  #Create Temporary working directory
  mkdir -p /tmp/ld$$/DEBIAN
  mkdir -p /tmp/ld$$/usr/share/man/man1
  cp packaging/default_files/control  /tmp/ld$$/DEBIAN/
  cp packaging/default_files/prerm    /tmp/ld$$/DEBIAN/
  cp packaging/default_files/postinst /tmp/ld$$/DEBIAN/
  cp packaging/default_files/*.1 /tmp/ld$$/usr/share/man/man1/
  gzip -9 /tmp/ld$$/usr/share/man/man1/*

  #Set permissions
  find /tmp/ld$$ -type d|xargs chmod 755
  #Correct symbolic links
  #1. find: print all symbolic links in our installation
  #2. ls: print the long listing format for the links
  #3. awk: extract the link position and link target and print them concatenated with a separator in between
  #4. sed: remove the path prefix of our temporary installation for the link target (but not for the link position)
  for link in `find /tmp/ld$$ -type l |xargs ls -l| awk '{print $8"_SEPARATOR_"$10}'|sed "s#_SEPARATOR_/tmp/ld$$#_SEPARATOR_#"`; do 
    # For every link set the corresponding target with stripped prefix
    ln -sf ${link#*_SEPARATOR_}  ${link%_SEPARATOR_*}
  done;
  #Correct location references in mkdxsinitrd:
  for file in `grep -l --recursive /tmp/ld$$ /tmp/ld$$/* 2>/dev/null`; do 
    sed -i 's#/tmp/ld[0-9]*##' $file
  done;

  #Create the package
  dpkg-deb --build /tmp/ld$$ > /dev/null
  . ./VERSIONS
  mv /tmp/ld$$.deb ./openslx_$OPENSLX_VERSION_STRING.deb
  echo "Written './openslx_$OPENSLX_VERSION_STRING.deb':"
  ls -lh ./openslx_$OPENSLX_VERSION_STRING.deb
fi
#Clean up
rm -rf /tmp/ld$$