#!/bin/bash

if [ -z $1 ]; then

    echo "usage: $0 <specfile1> [specfile2 ...]"

    exit 1

fi

export http_proxy="webcache.uk.sun.com:8080"

export ftp_proxy=${http_proxy}

PULL_NEW_TARBALLS=1

while [ $# -ne 0 ]

do

    specfile=$1

    if [ -f $specfile ]; then

        NAME=$(grep "^Name:" $specfile | sed -e "s/Name: *//" )

        NAME=$( echo $NAME )    # Gets rid of spaces and tabs that sed didn't.

        CURRENT=$(grep "^Version:" $specfile | sed -e "s/Version:[\t ]*//")

        CURRENT=$( echo $CURRENT )

        SOURCE=$(grep "^Source:" $specfile | sed -e "s/Source:[\t ]*//")

        SOURCE=$( echo $SOURCE )

        # Replace '%{Name}' with $NAME.

        SOURCE=$(echo $SOURCE | sed -e "s/\%{*[Nn]ame}*/${NAME}/g")

        #SOURCE=$(echo $SOURCE | sed -e "s/\%{*[Vv]ersion}*/${CURRENT}/g")

        SOURCEDIR=$(dirname $SOURCE)

        # Substitute '%version' if present in directory.

        SOURCEDIR=$(echo $SOURCEDIR | sed -e "s/\%{*[Vv]ersion}*/${CURRENT}/g")

        proto=$(echo $SOURCEDIR | cut -d ":" -f 1)

        if [ $proto != "http" -a $proto != "ftp" ]; then

            echo "Not fetching latest version for $NAME - can't use \"$SOURCEDIR\""

        else

	    LATEST=$(wget $SOURCEDIR -O - 2>/dev/null | grep "LATEST-IS" | sed -e "s/.*LATEST-IS-\([0-9][0-9\.]*\).*/\1/")

	    if [ -z $LATEST ]; then

	        echo "Cannot get latest version of $NAME from \"$SOURCEDIR/LATEST-IS*\""

	    else

	        if [ $LATEST = $CURRENT ]; then

                    echo "Okay with $NAME-$LATEST"

	        else if [ -z $PULL_NEW_TARBALLS ]; then

                         echo "Need to update to $NAME-$LATEST from $CURRENT"

	             else

# TODO: It may not be bz2!

# TODO: Use original $SOURCE with %{Version} replaced.

                         SOURCE=$(echo $SOURCE | sed -e "s/\%{*[Vv]ersion}*/${LATEST}/g")

                         wget -nv --no-clobber $SOURCE

                         if [ $? -eq 0 ]; then

                             echo "Update $specfile to $LATEST"

                         fi

	             fi

                fi 

            fi

	fi

    else

        echo "WARNING: $specfile does not exist."

    fi

    shift

done