#!/bin/sh
# $Id: vfjuggle,v 1.8 2002/10/10 05:45:52 gotar Exp $
# Enviroment:
# VF_MNTDEV	- the default is empty
#			VF_MNTDEV=/dev/hdd
# VF_MNTPOINT	- the default is /cdrom
#			VF_MNTPOINT=/mnt/cdrom
# VF_MOUNT	- the default is mount
#			VF_MOUNT="eject -t [$VF_MNTDEV]; hdparm -E 4 $VF_MNTDEV; mount"
# VF_UMOUNT	= the default is umount
# VF_EJECT	- the default is empty
#			VF_EJECT="eject [$VF_MNTDEV]"
#			VF_EJECT="ziptool -e /dev/zip",
#			VF_EJECT="cdeject -d $VF_MNTDEV"

cdid()
{
	URI=${1#cdrom://}
	CDID=`echo $URI | sed 's@/.*@@'`
	URI=`echo $URI | sed 's@[^/]*/@@'`
	BN=`basename $URI`

	#echo "$1 -> uri $URI, id $CDID"
	if [ -z "$URI" -o -z "$CDID" ]; then
		echo "$1: URL syntax error"
		exit 1
	fi
}

mount_()
{
	typeset id=$1

	if [ -f "$VF_MNTPOINT/$id" ]; then
		return 0
	fi

	eval $VF_MOUNT $VF_MNTDEV $VF_MNTPOINT 2>/dev/null
	if [ -f "$VF_MNTPOINT/$id" ]; then
		return 0
	fi

	while true; do
		echo "Umounting $VF_MNTPOINT..."
		$VF_UMOUNT $VF_MNTPOINT

		if [ -n "$VF_EJECT" ]; then
			"$VF_EJECT"
		fi

		echo "Insert the $id disk into drive you're using, and press ENTER"
		read
		if [ $? -ne 0 ]; then
			echo "read error; this should not happen, give up."
			exit 1
		fi

		echo "Mounting $VF_MNTDEV $VF_MNTPOINT..."
		eval $VF_MOUNT $VF_MNTDEV $VF_MNTPOINT
		typeset rc=$?

		if [ -f "$VF_MNTPOINT/$id" ]; then
			return 0
		elif [ $rc -eq 0 ]; then
			echo "Not a $id disk"
		fi
	done
}

must_be_copied() {
	case "$1" in
		Packages*|packages.dir|packages.dir.*)
			return 0
			;;

		*)
			return 1
	esac
}

usage()
{
	echo "usage: `basename $0` DESTDIR [cdrom://DISK_ID_FILE/PATH...]"
}


#
# main
#

if [ -f ~/.vfjugglerc ]; then
	. ~/.vfjugglerc
fi

PATH="/bin:/usr/bin:/sbin:/usr/sbin"

VF_MNTPOINT=${VF_MNTPOINT:-"/cdrom"}
if [ ! -d "$VF_MNTPOINT" ]; then
	echo "$VF_MNTPOINT: no such directory"
	exit 1
fi

if [ -n "$VF_MNTDEV" ]; then #	by default run mount $VF_MNTPOINT only
	if [ ! -b "$VF_MNTDEV" ]; then
		echo "$VF_MNTDEV: no such device"
		exit 1
	fi
fi

VF_MOUNT=${VF_MOUNT:-"mount"}
VF_UMOUNT=${VF_UMOUNT:-"umount"}

if [ "$#" = 0 ]; then
	usage
	exit 0
fi

DESTDIR=$1; shift;
if [ ! -d "$DESTDIR" ]; then
	echo "$DESTDIR: no such directory"
	exit 1
fi

#echo "POLDEK_VFJUGGLE_CPMODE = $POLDEK_VFJUGGLE_CPMODE"
while [ $# -gt 0 ]; do
	URL=$1; shift;

	cdid $URL

	if [ -r $DESTDIR/$BN ]; then
		continue
	fi

	if [ ! -f "$VF_MNTPOINT/$CDID" ]; then
		mount_ $CDID
	fi

	if [ ! -f "$VF_MNTPOINT/$URI" ]; then
		echo "$VF_MNTPOINT/$URI: no such file"
		exit 1
	fi

	if must_be_copied $BN; then
		POLDEK_VFJUGGLE_CPMODE="copy"
	fi

#	we only check if "$POLDEK..." == "copy", "link" != "copy"
#	and "" != "copy" too, so this condition is not needed I think

#	if [ -z "$POLDEK_VFJUGGLE_CPMODE" ]; then
#		POLDEK_VFJUGGLE_CPMODE="link"
#	fi

	if [ "$POLDEK_VFJUGGLE_CPMODE" == "copy" ]; then
#		echo "cp -L --remove-destination $VF_MNTPOINT/$URI $DESTDIR/"
		cp -L --remove-destination $VF_MNTPOINT/$URI $DESTDIR/
	else
#		echo "ln -sf $VF_MNTPOINT/$URI $DESTDIR/"
		ln -sf $VF_MNTPOINT/$URI $DESTDIR/
	fi

	if [ $? -ne 0 ]; then
		exit 1
	fi
done
exit 0

# This must be last line !
# vi:ts=8