configure environment variables

add_path.sh

function add_path() {

    if [ ! -d $1 ];then
        return
    fi

    NEWPREFIX=$1

    case ":$PATH:" in
        *":$NEWPREFIX/bin:"*) return;;
    esac
    
    if [ -d ${NEWPREFIX}/bin ];then
        export PATH=${NEWPREFIX}/bin:$PATH
    fi

    if [ "$LD_LIBRARY_PATH" ];then
        export LD_LIBRARY_PATH=${NEWPREFIX}/lib64:${NEWPREFIX}/lib:$LD_LIBRARY_PATH
    else
        export LD_LIBRARY_PATH=${NEWPREFIX}/lib64:${NEWPREFIX}/lib
    fi

    if [ "$PKG_CONFIG_PATH" ];then
        export PKG_CONFIG_PATH=${NEWPREFIX}/lib/pkgconfig:$PKG_CONFIG_PATH
    else
        export PKG_CONFIG_PATH=${NEWPREFIX}/lib/pkgconfig
    fi

    if [ "$MANPATH" ];then
        export MANPATH=${NEWPREFIX}/share/man:$MANPATH
    else
        export MANPATH=${NEWPREFIX}/share/man:/usr/share/man:/user/local/share/man:/usr/X11/man
    fi

    if [ -f ${NEWPREFIX}/bin/virtualenvwrapper_lazy.sh ];then
        source ${NEWPREFIX}/bin/virtualenvwrapper_lazy.sh
    fi
}