#!/bin/sh

# install : this script installs new packages from Jlime repository
# It is part of Jlime project
#
# This is a script to avoid (workaround) the opkg problems with memory.
# Long story short: opkg with a huge repository (jlime has 15000 packages)
#                   fails if it does not have swap. For many reasons.
#                   This script does not need swap and it is faster than opkg.

pkg_files="`find /var/lib/opkg/ -type f`"
# pkg_files="packages-mipsel"
pkg_file="/tmp/pkg_file.$$"
DEPEN=""
DTEMP="/var/lib/opkg-dirtemp.$$"

list_add(){
   LISTT=$LISTT"
`echo $1 | sed 's/, /\n/g' |sed 's/([^(]\+)$//g'`"
	LISTT=`echo $LISTT | sed "s/ /\n/g" | sort -u `
}

next_pkg(){
   if [ -n "$LISTT" ]; then 
	LISTT=`echo $LISTT | sed "s/ /\n/g" | grep -v ^"$1"$ `
	pkg=`echo $LISTT | sed "s/ /\n/g" | head -1`
	echo $DEPEN | sed "s/ /\n/g" | grep ^${pkg}$ > /dev/null && next_pkg "$pkg"
	echo $INSTALLED | sed "s/ /\n/g" | grep ^${pkg}$ > /dev/null && next_pkg "$pkg"
	echo -n "."
   else pkg=""
   fi
}


case $# in
2)
  pkg="$2";

  case $1 in
   "install")

echo "
Getting installed packages list... (wait a while)"
INSTALLED=`opkg list-installed | sed -e "s/ .*$//"`
# INSTALLED=`cat i | sed -e "s/ .*$//"`

# Check if the package is already installed
echo $INSTALLED | sed "s/ /\n/g" | grep ^${pkg}$ && echo "- the package is already installed." && exit 0

echo "Shrinking packages DB... (wait a while, around 30 seconds)"
cat $pkg_files | sed -n '/^Package/p;/^Filename/p;/^Depends/p' > /tmp/pkg_file.$$
# sed -n '/^Package/p;/^Filename/p;/^Depends/p' $pkg_file1 > /tmp/pkg_file.$$

# Check if the package is already installed
if !( grep "^Package: ${pkg}$" /tmp/pkg_file.$$ ) ; then
	echo " - the package does not exist."
	exit 1
fi

echo -n "Getting dependences : "
  while [ -n "$pkg" ]; do

	DEPEN=$DEPEN"
$pkg"
	dep=` grep -m 1 -A 1 "^Package: ${pkg}$" $pkg_file | grep Depends: | sed -e "s/Depends: //"`
	if [ -n "$dep" ]; then 
		list_add "$dep"         
	fi 
	next_pkg "$pkg"
  done  
  
	mkdir $DTEMP
	PWD=`pwd`
	cd $DTEMP
	for i in `echo $DEPEN`; do
		FN=`cat $pkg_files | grep -m 1 "Filename: ${i}_" | sed -e "s/^.* //"`
		echo -n "
  Getting ${FN} :"
		for j in `grep "^src " /etc/opkg/opkg.conf | sed -e "s/^src.* http:/http:/"`; do 
			echo -n " ..trying.."
			wget -q ${j}${FN} && break
		done
		if [ ! -f ${FN} ] ; then
			echo "FAILED. Aborting.."
			exit 1
		else
			echo -n " Done."
		fi
	done

	echo "

Installing : "
	mv /var/lib/opkg/* $DTEMP
	opkg install *.ipk
	rm *.ipk
	mv ${DTEMP}/* /var/lib/opkg/

	cd $PWD
	rm -rf $DTEMP
   ;;
#   "-f") 
#    for i in `cat /tmp/depend.$$`; do
#     sed -n "/^Package: ${i}$/,/^Priority:/s/^Filename: //p" $pkg_file
#     done
#   ;;
   "search") 
	echo "
Looking ${pkg}... (wait a while)"
	cat /var/lib/opkg/* | egrep "Package:|Description:|Section:" | sed  -e N -e "s/\n/ /" -e N -e "s/\n/ /" |
	grep -i ${pkg} | sed -e "s/Package: //" -e "s/Description:/:/" -e "s/Section:/ - section/"
   ;;
   "remove") 
	echo "
Removing ${pkg}... (wait a while)"
	opkg remove ${pkg}
   ;;
   *) printf "Usage: 
	$0 update
	$0 install <pkg>
	$0 remove <pkg>
	$0 search <regexp> \n";;
  esac;;
1)
	case $1 in	
	"update")
	mkdir $DTEMP
	PWD=`pwd`
	cd $DTEMP
		for j in `grep "^src " /etc/opkg/opkg.conf | sed -e "s/^src.* http:/http:/"`; do 
			D=`echo ${j}| sed -e "s/\/$//" -e "s/^.*\///"`
			echo "Downloading ${j}Packages.."
			wget -q ${j}Packages -O packages-${D}
		done
		mv packages-* /var/lib/opkg/
	cd $PWD
	rm -rf $DTEMP
	;;
	esac
;;
*) printf "Usage: 
	$0 update
	$0 install <pkg>
	$0 remove <pkg>
	$0 search <regexp> \n";;
#*) printf "Usage: $0 -f|-l package_name\n";;
esac

[[ -f /tmp/depend.$$ ]] && rm /tmp/depend.$$
[[ -f /tmp/temp.$$ ]] && rm /tmp/temp.$$
[[ -f /tmp/pkg_file.$$ ]] && rm /tmp/pkg_file.$$