REDHAT ISO EXTRACT

#!/bin/bash

set -e

usage() {

cat <<EOF

rh_iso_extract.sh [ options ]

Valid options are:
	-h | --help	This help
	-a | --arch	The architecture to work with [ default i386 ]
	-d | --dest-dir	The destination dir prefix    [ default /var/ftp ]
	-i | --iso-dir	The source iso dir prefix     [ default /var/ftp ]
	-r | --release  The release name              [ default beta/null ]

If you cannot loop mount a file on an NFS filesystem,
e.g. 2.2.x kernel based systems, you should copy your
iso images to a local directory and override the iso-dir
and dest-dir defaults.

e.g.
   # mkdir -p /mnt/scratch/ftp/pub/redhat/linux/RELEASE/en/iso/i386/

   # cp /var/ftp/pub/redhat/linux/RELEASE/en/iso/i386/*.iso \\
              /mnt/scratch/ftp/pub/redhat/linux/RELEASE/en/iso/i386/

   # rh_iso_extract.sh -i /mnt/scratch/ftp/pub -d /var/ftp/pub

EOF
exit 1
}

TEMP=`getopt -o ha:d:i:r: --long help,arch:,dest-dir:,iso-dir:,release: -n 'rh_iso_extract.sh' -- "$@"`

eval set -- "$TEMP"

while true ; do
	case "$1" in
		-h|--help) usage ;;
		-a|--arch)
			ARCH=$2
			shift 2
			;;
		-d|--dest-dir)
			DESTPREFIX=$2
			shift 2
			;;
		-i|--iso-dir)
			ISOPREFIX=$2
			shift 2
			;;
		-r|--release)
			RELEASE=$2
			shift 2
			;;
		--) shift ; break;;
		*) echo "Internal error!" ; exit 1;;
	esac
done

### Begin config

LOCAL_BASE_DIR=/var/ftp/pub
LOCAL_DEST_DIR=/var/ftp/pub

if [ "$ISOPREFIX" != "" ]; then
	LOCAL_BASE_DIR=$ISOPREFIX
	LOCAL_DEST_DIR=$ISOPREFIX
fi

if [ "$DESTPREFIX" != "" ]; then
	LOCAL_DEST_DIR=$DESTPREFIX
fi

if [ "$RELEASE" = "" ]; then
	RELEASE=beta/null
fi

RH_BASE_DIR=redhat/linux

RELEASE_BASE_DIR=$LOCAL_BASE_DIR/$RH_BASE_DIR/$RELEASE
RELEASE_DEST_DIR=$LOCAL_DEST_DIR/$RH_BASE_DIR/$RELEASE

ISO_BASE_DIR=$RELEASE_BASE_DIR/en/iso
OS_BASE_DIR=$RELEASE_DEST_DIR/en/os

DOC_ISO_DIR=$ISO_BASE_DIR/doc
DOC_DIR=$RELEASE_BASE_DIR/en/doc

# where to mount the iso's
MNTPNT=/mnt/cdrom

# white space separated list of architectures
ARCH_LIST="i386"

if [ "$ARCH" != "" ]; then
	ARCH_LIST="$ARCH"
fi

echo DESTPREFIX=$DESTPREFIX
echo ISOPREFIX=$ISOPREFIX
echo RELEASE=$RELEASE
echo ISO_BASE_DIR=$ISO_BASE_DIR
echo OS_BASE_DIR=$OS_BASE_DIR
echo ARCH_LIST=$ARCH_LIST

# who will own the created files
OWNER=rsync
OWNER_GRP=rsync

# whether to extract the doc iso as well: yes/no
DO_DOC=no

### End config

do_one_arch() {
    # Usage: do_one_arch arch
    arch=$1
    archdir=$OS_BASE_DIR/$arch
    arch_isodir=$ISO_BASE_DIR/$arch

    mkdir -p $archdir

    if ( ls $arch_isodir/*-$arch-*.iso > /dev/null 2>&1 ) ; then
        for disc in $arch_isodir/*-$arch-*.iso; do
	    echo Expanding `basename $disc` ...
	    mount -o loop $disc $MNTPNT
	    if ( cd $MNTPNT && pax -rw ./* $archdir ); then
	        umount $MNTPNT
	        echo Done
	    else
	        umount $MNTPNT
	        exit 1
	    fi
        done
    else
        echo "Unable to find $arch_isodir/*-$arch-*.iso"
    fi
}

do_one_srpms() {
    # Usage: do_one_srpms arch
    arch=$1
    srpms_dir=$OS_BASE_DIR/$arch/SRPMS
    arch_isodir=$ISO_BASE_DIR/$arch

    mkdir -p $srpms_dir

    if ( ls $arch_isodir/*-SRPMS-*.iso > /dev/null 2>&1 ) ; then
        for disc in $arch_isodir/*-SRPMS-*.iso; do
	    echo Expanding `basename $disc` ...
	    mount -o loop $disc $MNTPNT
	    if ( cd $MNTPNT/SRPMS && pax -rw ./* $srpms_dir ); then
	        umount $MNTPNT
	        echo Done
	    else
	       umount $MNTPNT
	       exit 1
	    fi
        done
    else
        echo "Unable to find $arch_isodir/*-SRPMS-*.iso"
    fi
}

do_docs() {
    # Usage: do_docs
    mkdir -p $DOC_DIR

    if ( ls ${DOC_ISO_DIR}/*-docs.iso ) ; then
        for disc in ${DOC_ISO_DIR}/*-docs.iso; do
	    echo Expanding `basename $disc` ...
	    mount -o loop $disc $MNTPNT
	    if ( cd $MNTPNT && pax -rw ./* $DOC_DIR ); then
	        umount $MNTPNT
	        echo Done
	    else
	        umount $MNTPNT
	        exit 1
	    fi
        done
    else
        echo "Unable to find $arch_isodir/*-docs.iso"
    fi
}

clean_trans_tbl() {
    # Usage: clean_trans_tbl dir
    dir=$1
    echo "Removing TRANS.TBL files from $1"
    find $dir -type f -name TRANS.TBL | xargs rm -f
}

set_owner() {
    # Usage: set_owner dir
    dir=$1
    echo "Setting user/group ownership for $1"
    # Do this in 2 steps to be more portable between *NIX systems
    chown -R $OWNER $dir
    chgrp -R $OWNER_GRP $dir
}

if [ "$DO_DOC" = "yes" ]; then
    docdir=$DOC_DIR

    if [ -d $docdir ] ; then
        echo "Removing existing documentation in $docdir"
        rm -rf $docdir
    fi

    do_docs
    clean_trans_tbl $docdir
    set_owner $docdir
fi

for arch in $ARCH_LIST; do
    archdir=$OS_BASE_DIR/$arch

    if [ -d $archdir ] ; then
        echo "Removing existing distribution in $archdir"
        rm -rf $archdir
    fi

    do_one_arch $arch
    do_one_srpms $arch
    clean_trans_tbl $archdir
    set_owner $archdir
done