#!/bin/sh
#
# Routine to generate and update release patch files for 
# either "official" or test patches.
#
#
usage() {
	echo "Usage:"
	echo "      `basename $0` release filespec revision out-loc"
	echo ""
	echo "    where:"
	echo "          release is the release for which the patch os prepared"
	echo ""
	echo "          filespec is the package/file containing the patch"
	echo "          as Level3/Level3/aaaa.hh or @filespec to define"
	echo "          a file containing a list of filename revision pairs"
	echo "
	echo "          revision is the revision information defining the"
	echo "		the exact cvs revision representing the patch."
	echo ""
	echo "          out-loc is the directory or package/directory to"
	echo "          contain the updated release.patches file."
	echo ""
	echo " If no revision information is given, the is assumed to"
	echo " reference the file at the head of the cvs repository."
	echo " If out_loc is not specified, the current directory is"
	echo " assumed.  The package will be tagged in a manner that"
	echo " reflects a change to the files referenced only."
	echo ""
	echo " If the '@filespec' notation is used the revision is not expected."
	echo ""
	echo " See \$BFDIST/releases/development/Release/README for more information"
	echo ""
}

at_file=no

release=$1
filespec=$2
if [ echo $filespec | cut -c1`" = '@' ]
then
    if [ "$4" != "" ]
    then
	usage
	exit 1
    else
	out_loc=$3
	at_file=yes
    fi
else
    revision=$3
    out_loc=$4
fi

if [ "${out_loc}" = "" ]
then
    out_loc=`pwd`
fi

if [ "`echo ${revision}|cut -c1`" != '-' ]
then
    revision="-r $revision"
fi

if [ "`echo ${out_loc} | cut -c1`" = '/' ]
then
    if [ ! -d ${out_loc} ] 
    then
	usage
	exit 1
    fi
else
    if [ ! -d ${out_loc} ]
    then
	echo ""
	echo ${out_loc} not found - attempting cvs checkout ...
	echo ""
	cvs -Q checkout `echo $out_loc|cut -f1 -d '/'`
	if [ ! -d $out_loc ]
	then
	    echo $out_loc not found in repository
	    usage
	    exit 1
	fi
    fi
fi
old_cwd=`pwd`
cd ${out_loc}
if [ ! -d CVS ]
then
    echo ${out_loc} is not a cvs entity
    echo It will NOT be added to the cvs repository
    echo ""
    cvs_commit=no
else
    echo ${out_loc} is a cvs entity.
    echo It will be updated in the cvs repository.
    echo ""
    cvs_commit=yes
    if [ -f ${release}.patches ]
    then
	echo ${out_loc}/${release}.patches exists
	echo Will be updated in the repository.
	echo ""
	cvs_add=no
    else
	echo ${out_loc}/$release.patches does not exist.
	echo It will be added to the repository
	echo ""
	touch $release.patches
	cvs add $release.patches
    fi
fi
cd ${old_cwd}