svncd() # directory repo [rev]
{
        if [ ! -d $1 ]; then
                echo "checking out $1"
                if [ $3 ]; then
                        REV="-r $3"
                fi
                process "svn co $REV $2 $1" "checking out $1"
        fi
        cd $1
        if [ $3 ]; then
                process "svn up -r $3" "updating $1 to revision $3"
        fi
}

gitcd() # directory repo [rev]
{
        if [ ! -d $1 ]; then
                process "git clone $2 $1" "checking out $1"
        fi
        cd $1
        if [ $3 ]; then
                process "git fetch" "updating $1"
                process "git checkout $3" "checking out $3 for $1"
        fi
}