#!/bin/sh
#
# grab_md5
# (c) 2004 Steve McIntyre <steve@einval.com>
#
# GPL v2
#
# Parse Packages and Sources files out of a mirror and pre-process
# them into a single list ready for mkisofs to check later

MIRROR=$1
ARCH=$2
SUITE=$3
OUT=$4

case $ARCH in
    source)
        FILES=`find $MIRROR/dists/$SUITE/ -name Sources.gz`
        echo -e "Using MD5 sums from Sources files:\n$FILES"
        zcat -f $FILES | awk -v MIRROR=$MIRROR '
            /^Directory:/      {
                                DIR = $2
                                next
                            }
            /^Files:/       {
                                in_files = 1
                                next
                            }
            /^ /            {
                                if (in_files) { 
                                    gsub("^ ", "", $0)
                                    MD5 = $1
                                                                       SIZE = $2
                                    FILE = $3
                                    printf("%s  %12s  %s/%s/%s\n", MD5, SIZE, MIRROR, DIR, FILE);
                                }
                            }
            /.*/            {
                                if (!length($0)) {
                                    in_files = 0
                                    next
                                }
                            }' | sort | uniq >> $OUT
        ;;
    alpha|amd64|arm|hppa|i386|ia64|m68k|mips|mipsel|powerpc|s390|sparc)
        FILES=`find $MIRROR/dists/$SUITE/ -name Packages -o -name Packages.gz | grep binary-$ARCH`
        echo -e "Using MD5 sums from Packages files:\n$FILES"
        zcat -f $FILES | awk -v MIRROR=$MIRROR '
            /^Filename:/    {
                                FILE = $2
                            }
            /^Size:/        {
                                SIZE = $2
                            }
            /^MD5sum:/      {
                                MD5 = $2
                                printf("%s  %12d  %s/%s\n", MD5, SIZE, MIRROR, FILE)
                            }' | sort | uniq >> $OUT
        case $SUITE in
            woody)
                # Use the old boot-floppies images
                FILE=$MIRROR/dists/$SUITE/main/disks-$ARCH/current/md5sum.txt
                echo "Using MD5 sums from boot-floppies: $FILE"
                LOC=dists/$SUITE/main/disks-$ARCH/current
                for ENTRY in `cat $FILE | sed 's/  /:/g'`
                do
                    PATH=`echo $ENTRY | /bin/sed "s?^.*:\./?$MIRROR/$LOC/?g"`
                    MD5=`echo $ENTRY | /bin/sed 's/:.*$//g'`
                    SIZE=`/usr/bin/stat -c %s $PATH`
                    printf '%s  %12.12s  %s\n' $MD5 $SIZE $PATH
                done | sort | uniq >> $OUT
                ;;
            *)
                # Use the new D-I images
                FILE=$MIRROR/dists/$SUITE/main/installer-$ARCH/current/images/MD5SUMS
                echo "Using MD5 sums from d-i: $FILE"
                LOC=dists/$SUITE/main/installer-$ARCH/current/images
                for ENTRY in `cat $FILE | sed 's/  /:/g'`
                do
                    PATH=`echo $ENTRY | /bin/sed "s?^.*:\./?$MIRROR/$LOC/?g"`
                    MD5=`echo $ENTRY | /bin/sed 's/:.*$//g'`
                    SIZE=`/usr/bin/stat -c %s $PATH`
                    printf '%s  %12.12s  %s\n' $MD5 $SIZE $PATH
                done | sort | uniq >> $OUT
                ;;
        esac
        ;;             
    *)
        echo "Unknown arch/source $ARCH!"
        exit 1
        ;;
esac

exit 0