#! /bin/sh
#----------------------------------------------------------------------------
# master-diff-config - master file for config file camparison
#
# Copyright (c) 2001-2003 Ansgar Püster <Ansgar.Puester@T-Online.de>
#
# Creation:     24.12.2003  ap
# Last Update:  $Id$
#
# 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 2 of the License, or
# (at your option) any later version.
#----------------------------------------------------------------------------

header()
{
  header_$type
}

header_cd()
{
  clrhome
  colecho "Show difference between current and default configuration" gn
  echo "line 1: $l_source line 2: $r_source"
}

header_cb()
{
  clrhome
  colecho "Show difference between current and backup configuration" gn
  echo "line 1: $l_source line 2: $r_source"
  echo
}

header_db()
{
  clrhome
  colecho "Show difference between default and a backup configuration" gn
  echo "line 1: $l_source line 2: $r_source"
  echo
}

header_bb()
{
  clrhome
  colecho "Show difference between two backup configurations" gn
  echo "line 1: $l_source line 2: $r_source"
  echo
}

footer()
{
  echo
  echo
  /var/install/bin/anykey
}

gotoyx () { echo -e "\033[$1;$2H\c"; }
echoyx () { echo -e "\033[$1;$2H\c"; shift; shift; echo -e "$*\c"; }

strip_file()
{

  in=$1
  out=$2

  cat ${in} |       \
  sed 's|^[[:blank:]]*||' | \
  sed 's|[[:blank:]]*$||' | \
  sed 's| |~|g'           | \
  grep '^[A-Z]'           | \
  sed 's|=| |'            | \
  sed "s|^\([^']*'\)\([^']*'\)\(.*\)|\1\2|"> ${out}
  chmod og-rw $out

}

echo_x()
{
  val="$1                                                                                "
  echo -e "${val:0:max_len}\c"
}

get_max_len()
{
  max_len=0
  while read var val
  do
     [ ${#var} -gt $max_len ] && max_len=${#var}
  done < $left
  while read var val
  do
     [ ${#var} -gt $max_len ] && max_len=${#var}
  done < $right
  max_len=$(expr $max_len + 2)
}

file_differ()
{
  if [ "$diff_sorted" = 'true' ]; then
     sort < $left > $left_sort
     sort < $right > $right_sort
     chmod og-rw $left_sort $right_sort
     diff $left_sort $right_sort >/dev/null 2>&1
     rc=$?
     rm -f $left_sort $right_sort
     return $rc
  else
     diff $left $right >/dev/null 2>&1
     rc=$?
     return $rc
  fi
}

clean()
{
  rm -f $right
  rm -f $left
  rm -f $right_sort
  rm -f $left_sort
  rm -f $diff_file
}

show_detail()
{
  get_max_len

  header
  row=4
  gotoyx $row 1
  diff -y $left $right > $diff_file
  chmod og-rw $diff_file
  while read line
  do
     set -- $line
     v1="$1"
     v2="$2"
     v3="$3"
     v4="$4"
     v5="$5"
     case $# in
	3) if [ "$v1" = ">" ]; then
	      echo_x $v2
	      echo   "1: - undefined -"
	      echo_x ""
	      echo   '2: '$v3 | sed 's|~| |g'
	      row=$(expr $row + 2)
	   else
	      if [ "$v3" = "<" ]; then
		 echo_x $v1
		 echo   '1: '$v2 | sed 's|~| |g'
		 echo_x ""
		 echo   "2: - undefined -"
		 row=$(expr $row + 2)
	      else
		 echo "Error(3): $line"
		 row=$(expr $row + 1)
	      fi
	   fi;;
	4) if [ "$v2" != "$v4" ]; then
	      echo_x $v1
	      echo   '1: '$v2 | sed 's|~| |g'
	      echo_x ""
	      echo   '2: '$v5 | sed 's|~| |g'
	      row=$(expr $row + 2)
	   fi;;
	5) case $v3 in
	      \|) echo_x $v1
		  echo   '1: '$v2 | sed 's|~| |g'
		  echo_x ""
		  echo   '2: '$v5 | sed 's|~| |g'
		  row=$(expr $row + 2)
		  ;;
	       *) echo "Error(5): $line"
		  row=$(expr $row + 1)
		  ;;
	   esac;;
	*) echo "Error($#): $line"
	   row=$(expr $row + 1)
	   ;;
     esac
     if [ $row -gt 21 ]; then
	echo "Enter return to continue, q to quit:"
	read answer </dev/tty
	if [ "$answer" = 'q' -o "$answer" = 'Q' ]; then
	   break
	else
	   header </dev/tty
	   row=4
	   gotoyx $row 1
	fi
     fi

  done < $diff_file
}

question()
(
  echo
  echo
  /usr/local/bin/colecho "Enter number to select a file, return to continue, q to quit:           \b\b\b\b\b\b\b\b\b\b\c"
)

# include function library
. /var/install/bin/config_shlib

#----------------------------------------------------------------------------

# get package name from filename PACKAGE-diff-XY
#
filename=`basename $0`
package=`echo $filename | sed "s|-diff-[cdb][cdb]$||"`
type=`echo $filename | sed "s|${package}-diff-||"`

case $type in
  cd)  l_source=$configd/$package
       r_source=$defaultd/$package
       ;;
  cb)  l_source=$configd/$package
       r_source="-"
       ;;
  db)  l_source=$defaultd/$package
       r_source="-"
       ;;
  bb)  l_source="-"
       r_source="-"
       ;;
  *)   echo "Error: illegal call $filename"
       footer
       exit
       ;;
esac

act_count=0
fcount=0

if  [ $l_source = '-' ]; then
    select_file
    if [ $selected = 'true' ]; then
       case $fnumber in
	[0-9]*)  eval l_source=\${bfile[$fnumber]}
		 omit_file=$l_source;;
	   Q|q)  ;;
       esac
    else
       footer
       exit
    fi
fi

if  [ $r_source = '-' ]; then
    select_file
    if [ $selected = 'true' ]; then
       case $fnumber in
	[0-9]*)  eval r_source=\${bfile[$fnumber]};;
	   Q|q)  ;;
       esac
    else
       footer
       exit
    fi
fi

if [ $l_source != '-' -a ! -f $l_source ]; then
   header
   echo
   /usr/local/bin/colecho "File $l_source does not exist." rd
   l_source='-'
   footer
fi

if [ $r_source != '-' -a ! -f $r_source ]; then
   header
   echo
   /usr/local/bin/colecho "File $r_source does not exist." rd
   r_source='-'
   footer
fi

if [ $l_source != '-' -a $r_source != '-' ]; then
   header
   tmp_dir=/tmp
   right=$tmp_dir/right.$$
   left=$tmp_dir/left.$$
   diff_file=$tmp_dir/diff_file.$$
   right_sort=$tmp_dir/right.srt.$$
   left_sort=$tmp_dir/left.srt.$$
   diff_sorted='yes'

   strip_file ${l_source} $left
   strip_file ${r_source} $right

   echo
   echo "Files are compared without any comments. Unused leading and trailing"
   echo "spaces are removed. The files are sorted alphabetically for this first"
   echo "comparison to get an optimal result".
   echo
   if ! file_differ; then
      /usr/local/bin/colecho "The two files are different." rd
      echo
      if /var/install/bin/ask "Show differencies"; then
	 show_detail
      fi
   else
      /usr/local/bin/colecho "The two files are identical." gn
   fi
else
   header
   /usr/local/bin/colecho "Too few files selected" rd
fi

clean
footer

exit