#!/bin/bash
# Stefano Stabellini
# http://www.stabellini.net
# e-mail: stefano@stabellini.net
#

CWD=`pwd`

#converts glibc-2.3.5-i486-5 to 2.3.5-i486-5
completetonolast(){
	NUMFIELDS=`echo "$1" | awk -F - '{print NF}'`
	if test $NUMFIELDS -ge 4
	then
		echo ${1%-*}
	fi
}

#converts glibc-2.3.5-i486-5 to glibc
completetoname(){
	NUMFIELDS=`echo "$1" | awk -F - '{print NF}'`
	if test $NUMFIELDS -ge 4
	then
		echo ${1%-*-*-*}
	fi
}

help(){
	echo "Usage: repos.slapt [OPTION]... DIRECTORY"
        echo "Creates a Slackware-like directory structure."
        echo
        echo " -p, --partial    	only add new packages"
        echo " -q, --quiet      	suppress output"
        echo " -n, --noclog		doesn't generate the ChageLog.txt"
        echo " -d, --descriptions	generates a .txt description file for each package"
        echo " -s, --signs		signs each tgz package (generates .asc files)"
        echo "     --help       	display this help and exit"
        echo "     --version    	output version information and exit"
        echo
        echo "Report bugs to <stefano@stabellini.net>."
}

check_settings() {
	QUIET=0
	CHANGELOG=1
	DESCRIPTIONS=0
	SIGN=0
	for i in $@
	do
		case "$i" in
		  "--quiet" | "-q" )
		    QUIET=1
		    ;;
		  "--partial" | "-p" )
		    PARTIAL=1
 		    ;;
		  "--full" | "-f" )
		    PARTIAL=0
		    ;;
		  "--noclog" | "-n" )
		    CHANGELOG=0
		    ;;
		  "--descriptions" | "-d" )
		    DESCRIPTIONS=1
		    ;;
		  "--signs" | "-s" )
		    SIGN=1
		    ;;
		  "--version" )
		    echo "repos 1.0.0" 
		    echo "Written by Stefano Stabellini".
		    echo
		    echo "This is free software.  There is NO"
		    echo "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
		    exit 0
		    ;;
		  "--help" )
		    help
                    exit 0
		    ;;
		  * )
		    if [ -d $i ]; then
		      REPOSDIR=$i
		    else
		      echo $i is not a valid directory
		      exit 1
		    fi
		    ;;
		esac
	done
	if [[ "$REPOSDIR" == "" ]]; then
		echo "You must supply a valid directory"
		exit 1
	fi
        if [ ! -w $REPOSDIR ]; then
                echo "You do not have write permission for $REPOSDIR"
                exit 1
        fi
	if [ ! -d $REPOSTMP ]; then
	        mkdir $REPOSTMP
	elif [ ! -w $REPOSTMP ]; then
		echo "You do not have write permission for $REPOSTMP"
		exit 1
	fi

}

partial_MPL() {
	if test $CHANGELOG -ne 1
	then
		N=0
		CHANGE=`find ./ -cnewer PACKAGES.TXT | sed /"\/src\/"/d | grep [.]tgz$`
		for i in $CHANGE
		do
			NEWCHANGENAMES[$N]="`basename $i`"
			N=$(( $N + 1 ))
		done
	fi
	if test -z "$CHANGE"
	then
		exit
	fi
	if [ -f PACKAGES.TXT ]; then
		cp PACKAGES.TXT $REPOSTMP
	else
		echo "Error.  No PACKAGES.TXT found.  Run without --partial option first."
		exit 1
	fi

        echo "PACKAGES.TXT;  `date`" > $REPOSTMP/PACKAGESHEADER.TXT
        echo >> $REPOSTMP/PACKAGESHEADER.TXT
        echo "This file provides details on the packages found on this site" >> $REPOSTMP/PACKAGESHEADER.TXT
        TOTALCSIZE=`grep "Total size of all packages (compressed)" $REPOSTMP/PACKAGES.TXT | awk {'print $8 '}`
        TOTALUSIZE=`grep "Total size of all packages (uncompressed)" $REPOSTMP/PACKAGES.TXT | awk {'print $8 '}`
        TMPVAL=`wc -l $REPOSTMP/PACKAGES.TXT | awk {'print $1'}`
	tail -n $(($TMPVAL - 6)) $REPOSTMP/PACKAGES.TXT > $REPOSTMP/PACKAGESBODY.TXT	
	j=0
	for i in $CHANGE
	do
		if [ "$QUIET" -ne "1" ]; then
			echo "Adding ${NEWCHANGENAMES[$j]}"
		fi
                echo "++========================================" >> $REPOSTMP/MANIFEST
                echo "||" >> $REPOSTMP/MANIFEST
                echo "||   Package:  $i" >> $REPOSTMP/MANIFEST
                echo "||" >> $REPOSTMP/MANIFEST
                echo "++========================================" >> $REPOSTMP/MANIFEST
		tar tvfz $i >> $REPOSTMP/MANIFEST
		echo >> $REPOSTMP/MANIFEST
                echo >> $REPOSTMP/MANIFEST
		echo "PACKAGE NAME:  ${NEWCHANGENAMES[$j]} " >> $REPOSTMP/PACKAGESBODY.TXT
                echo "PACKAGE LOCATION:  `dirname $i`" >> $REPOSTMP/PACKAGESBODY.TXT
                CSIZE=$( expr `gunzip -l $i |tail -1|awk '{print $1}'` / 1024 )
                USIZE=$( expr `gunzip -l $i |tail -1|awk '{print $2}'` / 1024 )
                echo "PACKAGE SIZE (compressed):  $CSIZE K" >> $REPOSTMP/PACKAGESBODY.TXT
                gunzip -c $i > $REPOSTMP/file.tar
                echo "PACKAGE SIZE (uncompressed):  $USIZE K" >> $REPOSTMP/PACKAGESBODY.TXT
		
		REQUIRED=$(tar xzfO $i install/slack-required 2>/dev/null|xargs -r -iZ echo -n "Z,"|sed -e "s/,$//")
	    	CONFLICTS=$(tar xzfO $i install/slack-conflicts 2>/dev/null|xargs -r -iZ echo -n "Z,"|sed -e "s/,$//")
	    	SUGGESTS=$(tar xzfO $i install/slack-suggests 2>/dev/null|xargs -r )
		echo "PACKAGE REQUIRED:  $REQUIRED" >> $REPOSTMP/PACKAGESBODY.TXT
	    	echo "PACKAGE CONFLICTS:  $CONFLICTS" >> $REPOSTMP/PACKAGESBODY.TXT
	    	echo "PACKAGE SUGGESTS:  $SUGGESTS" >> $REPOSTMP/PACKAGESBODY.TXT
		
                echo "PACKAGE DESCRIPTION:" >> $REPOSTMP/PACKAGESBODY.TXT
                
                if test $DESCRIPTIONS -eq 0
                then
                	tar xzOf $i install/slack-desc | sed /^$/d | sed /^#/d | sed /\|-/d >> $REPOSTMP/PACKAGESBODY.TXT 2> /dev/null
                else
                	TDESC=${i%.tgz}
                	tar xzOf $i install/slack-desc | sed /^$/d | sed /^#/d | sed /\|-/d | tee $TDESC".txt" >> $REPOSTMP/PACKAGESBODY.TXT 2> /dev/null
                fi
                
                if test $SIGN -eq 1
                then
                	rm $i.asc &>/dev/null
                	echo "$pass" | gpg --passphrase-fd 0 -o $i.asc -sba $i
                fi
                
                echo >> $REPOSTMP/PACKAGESBODY.TXT
                echo >> $REPOSTMP/PACKAGESBODY.TXT
                TOTALCSIZE=$(($TOTALCSIZE + $CSIZE)) 
		TOTALUSIZE=$(($TOTALUSIZE + $USIZE))
                tar tfz $i 2> /dev/null | sed -e "s/\.\*/${NEWCHANGENAMES[$j]}: \&/" >> $REPOSTMP/files.tmp
                j=$(($j + 1))
	done 	
        TOTALCSIZE=$(($TOTALCSIZE + $CSIZE)) 
	TOTALUSIZE=$(($TOTALUSIZE + $USIZE))
	echo "Total size of all packages (compressed) :  $TOTALCSIZE MB" >> $REPOSTMP/PACKAGESHEADER.TXT
        echo "Total size of all packages (uncompressed) :  $TOTALUSIZE MB" >> $REPOSTMP/PACKAGESHEADER.TXT
        echo >> $REPOSTMP/PACKAGESHEADER.TXT
        echo >> $REPOSTMP/PACKAGESHEADER.TXT
        bzip2 $REPOSTMP/MANIFEST
        grep [.]so $REPOSTMP/files.tmp | sort -t : -k 1 -r >> $REPOSTMP/libraries-repository.tmp
	cat $REPOSTMP/libraries-repository.tmp $REPOSTMP/libraries-repository | sort -t : -k 1 -r > libraries-repository	
}

create_MPL() {
	if [ "$QUIET" -ne "1" ]; then
		echo "MANIFEST.bz2, PACKAGES.TXT, libraries-repository olusturuluyor..."
	fi
	echo "PACKAGES.TXT;  `date`" > $REPOSTMP/PACKAGESHEADER.TXT
	echo >> $REPOSTMP/PACKAGESHEADER.TXT
	echo "This file provides details on the packages found on this site" >> $REPOSTMP/PACKAGESHEADER.TXT
	if test $CHANGELOG -ne 1
	then
		N=0
		FILELIST=`tree -fi --noreport | sed /"\/src\/"/d | grep [.]tgz$`
		for i in $FILELIST
		do
			NEWCOMPLETENAMES[$N]="`basename $i`"
			N=$(( $N + 1 ))
		done
	fi
	TOTALCSIZE=0
	TOTALUSIZE=0
	j=0
	for i in $FILELIST
	do	
        	echo "++========================================" >> $REPOSTMP/MANIFEST
                echo "||" >> $REPOSTMP/MANIFEST
	        echo "||   Package:  $i" >> $REPOSTMP/MANIFEST
        	echo "||" >> $REPOSTMP/MANIFEST
                echo "++========================================" >> $REPOSTMP/MANIFEST
	        tar tvfz $i >> $REPOSTMP/MANIFEST
        	echo >> $REPOSTMP/MANIFEST
                echo >> $REPOSTMP/MANIFEST
        	echo "PACKAGE NAME:  ${NEWCOMPLETENAMES[$j]} " >> $REPOSTMP/PACKAGESBODY.TXT
                echo "PACKAGE LOCATION:  `dirname $i`" >> $REPOSTMP/PACKAGESBODY.TXT
	        CSIZE=$( expr `gunzip -l $i |tail -1|awk '{print $1}'` / 1024 )
		USIZE=$( expr `gunzip -l $i |tail -1|awk '{print $2}'` / 1024 )
	        echo "PACKAGE SIZE (compressed):  $CSIZE K" >> $REPOSTMP/PACKAGESBODY.TXT
        	gunzip -c $i > $REPOSTMP/file.tar
                echo "PACKAGE SIZE (uncompressed):  $USIZE K" >> $REPOSTMP/PACKAGESBODY.TXT
		
		REQUIRED=$(tar xzfO $i install/slack-required 2>/dev/null|xargs -r -iZ echo -n "Z,"|sed -e "s/,$//")
	    	CONFLICTS=$(tar xzfO $i install/slack-conflicts 2>/dev/null|xargs -r -iZ echo -n "Z,"|sed -e "s/,$//")
	    	SUGGESTS=$(tar xzfO $i install/slack-suggests 2>/dev/null|xargs -r )
		echo "PACKAGE REQUIRED:  $REQUIRED" >> $REPOSTMP/PACKAGESBODY.TXT
	    	echo "PACKAGE CONFLICTS:  $CONFLICTS" >> $REPOSTMP/PACKAGESBODY.TXT
	    	echo "PACKAGE SUGGESTS:  $SUGGESTS" >> $REPOSTMP/PACKAGESBODY.TXT
		
	        echo "PACKAGE DESCRIPTION:" >> $REPOSTMP/PACKAGESBODY.TXT
                
                if test $DESCRIPTIONS -eq 0
                then
                	tar xzOf $i install/slack-desc | sed /^$/d | sed /^#/d | sed /\|-/d >> $REPOSTMP/PACKAGESBODY.TXT 2> /dev/null
                else
                	TDESC=${i%.tgz}
                	tar xzOf $i install/slack-desc | sed /^$/d | sed /^#/d | sed /\|-/d | tee $TDESC".txt" >> $REPOSTMP/PACKAGESBODY.TXT 2> /dev/null
                fi
                
                if test $SIGN -eq 1
                then
                	rm $i.asc &>/dev/null
                	echo "$pass" | gpg --passphrase-fd 0 -o $i.asc -sba $i
                fi
                
                echo >> $REPOSTMP/PACKAGESBODY.TXT
                echo >> $REPOSTMP/PACKAGESBODY.TXT
	        TOTALCSIZE=$(($TOTALCSIZE + $CSIZE)) 
	        TOTALUSIZE=$(($TOTALUSIZE + $USIZE))
	        tar tfz $i 2> /dev/null | sed -e "s/\.\*/${NEWCOMPLETENAMES[$j]}: \&/" >> $REPOSTMP/files.tmp
	        j=$(($j + 1))
	done
	TOTALCSIZE=$(($TOTALCSIZE / 1024))
	TOTALUSIZE=$(($TOTALUSIZE / 1024))
	echo "Total size of all packages (compressed) :  $TOTALCSIZE MB" >> $REPOSTMP/PACKAGESHEADER.TXT
	echo "Total size of all packages (uncompressed) :  $TOTALUSIZE MB" >> $REPOSTMP/PACKAGESHEADER.TXT
	echo >> $REPOSTMP/PACKAGESHEADER.TXT
	echo >> $REPOSTMP/PACKAGESHEADER.TXT
	bzip2 $REPOSTMP/MANIFEST
	grep [.]so $REPOSTMP/files.tmp | sort -t : -k 1 -r > $REPOSTMP/libraries-repository
}

create_changelog(){
	if test -f ChangeLog.txt && test -f PACKAGES.TXT
	then
		mv ChangeLog.txt ChangeLog.old
		CHANGE=`find ./ -cnewer PACKAGES.TXT | sed /"\/src\/"/d | grep [.]tgz$`
		FILELIST=`tree -fi --noreport | sed /"\/src\/"/d | grep [.]tgz$`
		NNEW=0
		for i in $FILELIST
		do
			NEWCOMPLETENAMES[$NNEW]="`basename $i`"
			NEWNAMES[$NNEW]=`completetoname ${NEWCOMPLETENAMES[$NNEW]}`
			NNEW=$(( $NNEW + 1 ))
		done
		OLDPACKAGES=`cat PACKAGES.TXT | grep "PACKAGE NAME:" | awk '{print$3}'`
		NOLD=0
		for i in $OLDPACKAGES
		do
			OLDNAMES[$NOLD]=`completetoname $i`
			NOLD=$(( $NOLD + 1 ))
		done
		N=0
		for i in $CHANGE
		do
			NEWCHANGENAMES[$N]="`basename $i`"
			if test -z "`echo $OLDPACKAGES | grep -E "(^| )${NEWCHANGENAMES[$N]}($| )"`"
			then
				t2="`completetoname ${NEWCHANGENAMES[$N]}`"
				t3="`completetonolast ${NEWCHANGENAMES[$N]}`"
				#added
				if test -z "`echo ${OLDNAMES[@]} | grep -E "(^| )$t2($| )"`"
				then
					TN=${#ADD[@]}
					ADD[$TN]="${NEWCHANGENAMES[$N]}"
				#recomp
				elif test "`echo $OLDPACKAGES | grep -E "(^| )$t3-"`"
				then
					TN=${#RECOM[@]}
					RECOM[$TN]="${NEWCHANGENAMES[$N]}"
				#upgraded
				else
					TN=${#UP[@]}
					UP[$TN]="${NEWCHANGENAMES[$N]}"
				fi
			fi
			N=$(($N + 1))
		done
		TN=0
		for ((i=0; i < $NOLD; i++))
		do
			FOLD=0
			for ((j=0; j < $NNEW; j++))
			do
				if test "${NEWNAMES[$j]}" = "${OLDNAMES[$i]}"
				then
					FOLD=1
					break
				fi
			done
			if test $FOLD -eq 0
			then
				REM[$TN]=${OLDNAMES[$i]}
				TN=$(( $TN + 1 ))
			fi
		done
		if test $(( ${#REM[@]} + ${#UP[@]} + ${#RECOM[@]} + ${#ADD[@]} )) -gt 0
		then
			date > ChangeLog.txt
			for ((i=0; i<${#ADD[@]}; i++))
			do
				echo "eklendi :: ${ADD[$i]}">> ChangeLog.txt
			done
			for ((i=0; i<${#RECOM[@]}; i++))
			do
				echo "yeniden :: ${RECOM[$i]}">> ChangeLog.txt
			done
			for ((i=0; i<${#UP[@]}; i++))
			do
				echo "guncellendi :: ${UP[$i]}">> ChangeLog.txt
			done
			for ((i=0; i<${#REM[@]}; i++))
			do
				echo "kaldirildi :: ${REM[$i]}">> ChangeLog.txt
			done
			echo "+--------------------------+" >> ChangeLog.txt
		fi
		cat ChangeLog.old >> ChangeLog.txt
		rm ChangeLog.old &>/dev/null
	else
		if test "$QUIET" -ne "1"
		then
			echo "ChangeLog.txt veya PACKAGES.TXT bulunamadi: assuming this is a new repository"
		fi
		FILELIST=`tree -fi --noreport | sed /"\/src\/"/d | grep [.]tgz$`
		N=0
		if test "$FILELIST"
		then
			date > ChangeLog.txt
			for i in $FILELIST
			do
				NEWCOMPLETENAMES[$N]="`basename $i`"
				echo "eklendi :: ${NEWCOMPLETENAMES[$N]}">> ChangeLog.txt
				N=$(( $N + 1 ))
			done
		fi
	fi
}

create_checksums() {
        if [ "$QUIET" -ne "1" ]; then
		echo CHECKSUMS.md5 olusturuluyor
	fi
	rm CHECKSUMS.md5 2> /dev/null
	FILELIST=`tree -fi --noreport`
	echo "These are the MD5 message digests for the files in this directory." >> $REPOSTMP/CHECKSUMS.md5
	echo "If you want to test your files, use 'md5sum' and compare the values to" >> $REPOSTMP/CHECKSUMS.md
	echo "the ones listed here." >> $REPOSTMP/CHECKSUMS.md5
	echo >> $REPOSTMP/CHECKSUMS.md5
	echo "To test all these files, use this command:" >> $REPOSTMP/CHECKSUMS.md5
	echo >> $REPOSTMP/CHECKSUMS.md5
	echo "md5sum -c CHECKSUMS.md5 | less" >> $REPOSTMP/CHECKSUMS.md5
	echo >> $REPOSTMP/CHECKSUMS.md5
	echo "'md5sum' can be found in the GNU textutils package on ftp.gnu.org in" >> $REPOSTMP/CHECKSUMS.md5
	echo "/pub/gnu, or at any GNU mirror site." >> $REPOSTMP/CHECKSUMS.md5
	echo >> $REPOSTMP/CHECKSUMS.md5
	for i in $FILELIST
	do
        	md5sum $i 2> /dev/null 1>> $REPOSTMP/CHECKSUMS.md5
	done
}

cleanup() {
        if [ "$QUIET" -ne "1" ]; then
		echo Gecici calisma dizini temizleniyor
	fi
	rm -f $REPOSTMP/* 2> /dev/null
}

REPOSTMP=/tmp/repos
rm -r $REPOSTMP &> /dev/null
check_settings "$@"
cd $REPOSDIR

if test $SIGN -eq 1
then
	echo "If you need a passphrase to unlock your secret key, enter it here:"
	read -s pass
fi

if test $CHANGELOG -ne 0
then
	create_changelog
fi

if [[ "$PARTIAL" == "1" ]]; then
	partial_MPL
else
	create_MPL
fi
	
cat $REPOSTMP/PACKAGESHEADER.TXT $REPOSTMP/PACKAGESBODY.TXT | uniq > PACKAGES.TXT
gzip -9 -c PACKAGES.TXT > PACKAGES.TXT.gz

create_checksums
mv $REPOSTMP/CHECKSUMS.md5 . 

cleanup