#!/bin/sh

if [ $# -ne 3 -a $# -ne 2 ]; then
    echo "Usage: $0 module [basetag] extension" >&2
    exit 1
fi
module=$1
shift
if [ $# -gt 1 ]; then
    basetag=$1
    shift
else
    basetag=`cat $module/CVS/Tag|cut -c2-`
    echo -n "Base on $basetag? "
    read ans
    if [ "$ans" != "y" ]; then
	basetag=`echo $basetag|sed -e 's/-[^-]*$//'`
	echo -n "Base on $basetag? "
	read ans
	if [ "$ans" != "y" ]; then echo "ABORTED!"; exit 1; fi
    fi
fi
if [ -d $module ]; then
    CVSROOT=`cat $module/CVS/Root`
    module=`cat $module/CVS/Repository|sed -e"s%^$CVSROOT%%;s%^/%%"`
    export CVSROOT
fi
extension=$1
shift
workbasedir=`pwd`
workdir="`basename $module`-$extension"
tag="`echo $basetag|sed -e 's/-local.*$//'`-local_$extension"
rmdir $workdir 2>/dev/null
if [ -d $workdir ]; then
    echo "ERROR! There is already a directory named $workdir" >&2
    echo "Please clean this up before running this command" >&2
    exit 1
fi

# Create local branch and supporting tags
cvs rtag -F -b -r"${basetag}" "${tag}" $module
cvs rtag -F -r "${tag}" "${tag}-lastpatch" $module

# Checkout a new working directory
mkdir -p $workdir
cvs checkout -r "${tag}" -d $workdir $module 

if [ -f $module/config.cache ]; then
    # Run configure
    cp -p $module/config.cache $workdir/config.cache 2>/dev/null
    cp -p $module/config.status $workdir/config.status 2>/dev/null
    cd $workdir
    if [ -f config.status ]; then
	sh -c "./config.status --recheck ; ./config.status"
    fi
fi