#!/bin/sh
#
# Copyright (c) Members of the EGEE Collaboration. 2004-2010.
# See http://www.eu-egee.org/partners/ for details on the copyright
# holders.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Authors:
# 2013-
#    Mischa Sall\'e <msalle@nikhef.nl>
#    Dennis van Dok <dennisvd@nikhef.nl>
#    NIKHEF Amsterdam, the Netherlands
#    <grid-mw-security@nikhef.nl> 
#
# 2009-2013
#    Oscar Koeroo <okoeroo@nikhef.nl>
#    Mischa Sall\'e <msalle@nikhef.nl>
#    David Groep <davidg@nikhef.nl>
#    NIKHEF Amsterdam, the Netherlands
#    <grid-mw-security@nikhef.nl> 
#
# 2007-2009
#    Oscar Koeroo <okoeroo@nikhef.nl>
#    David Groep <davidg@nikhef.nl>
#    NIKHEF Amsterdam, the Netherlands
#
# 2003-2007
#    Martijn Steenbakkers <martijn@nikhef.nl>
#    Oscar Koeroo <okoeroo@nikhef.nl>
#    David Groep <davidg@nikhef.nl>
#    NIKHEF Amsterdam, the Netherlands
#

prefix=/usr
exec_prefix=${prefix}

LOCATION_LIB=${prefix}/lib/i386-linux-gnu/lcas-lcmaps-gt4-interface
GLOBUS_FLAVOR=
ETC_GRID_SEC="/etc/grid-security"
GSI_AUTHZ_FILE="$ETC_GRID_SEC/gsi-authz.conf"

SHARED_OBJECT_FILETYPE=.so
GT4_INTERFACE_SHARED_OBJECT_FILE_PREFIX="liblcas_lcmaps_gt4_mapping"

GT4_INTERFACE_SHARED_OBJECT_FILE="$LOCATION_LIB"/"$GT4_INTERFACE_SHARED_OBJECT_FILE_PREFIX$SHARED_OBJECT_FILETYPE"
GT4_GLOBUS_FLAVOR_INTERFACE_SHARED_OBJECT_FILE="$LOCATION_LIB"/"$GT4_INTERFACE_SHARED_OBJECT_FILE_PREFIX$SHARED_OBJECT_FILETYPE"




writegsiauthz() {
    objectfile=$1
    echo "Notice: Using library at $objectfile"
    if [ -f "$GSI_AUTHZ_FILE" ]; then
        mv -v $GSI_AUTHZ_FILE $GSI_AUTHZ_FILE.is-replaced
    fi

    cat > $GSI_AUTHZ_FILE << EOF
globus_mapping $objectfile lcmaps_callout
EOF

    chmod 0644 $GSI_AUTHZ_FILE
}



debug() {
    echo "Using the following environment variables:"
    echo

    echo "\$ETC_GRID_SEC                                   " $ETC_GRID_SEC
    echo "\$GSI_AUTHZ_FILE                                 " $GSI_AUTHZ_FILE
    echo "\$prefix                                         " $prefix
    echo "\$LOCATION_LIB                                   " $LOCATION_LIB

    echo 
    echo "\$GLOBUS_FLAVOR                                  " $GLOBUS_FLAVOR
    echo "\$SHARED_OBJECT_FILETYPE                         " $SHARED_OBJECT_FILETYPE
    echo "\$GT4_INTERFACE_SHARED_OBJECT_FILE_PREFIX        " $GT4_INTERFACE_SHARED_OBJECT_FILE_PREFIX
    echo

    echo "\$GT4_INTERFACE_SHARED_OBJECT_FILE               " $GT4_INTERFACE_SHARED_OBJECT_FILE
    echo "\$GT4_GLOBUS_FLAVOR_INTERFACE_SHARED_OBJECT_FILE " $GT4_GLOBUS_FLAVOR_INTERFACE_SHARED_OBJECT_FILE
    echo 
}


install() {
    # First try flavoured version
    libso=$GT4_GLOBUS_FLAVOR_INTERFACE_SHARED_OBJECT_FILE
    if [ -f "$libso" ]; then
	writegsiauthz "$libso"
    else
	# Try flavoured but followed by version
	lib=`ls $libso.* 2>/dev/null|egrep "$libso\.[0-9]+\.|$libso\.[0-9]+$"|head -1`
	if [ -n "$lib" ]; then
	    writegsiauthz "$lib"
	else
	    # Try non-flavoured version
	    libso=$GT4_INTERFACE_SHARED_OBJECT_FILE
	    if [ -f "$libso" ]; then
		writegsiauthz "$libso"
	    else
		# Try non-flavoured followed by version
		lib=`ls $libso.* 2>/dev/null|egrep "$libso\.[0-9]+\.|$libso\.[0-9]+$"|head -1`
		if [ -n "$lib" ]; then
		    writegsiauthz "$lib"
		else
		    # Unknown lib
		    echo "Error: Cannot find interface." >&2
		    echo "Search for either" >&2
		    echo "    $GT4_INTERFACE_SHARED_OBJECT_FILE_PREFIX$SHARED_OBJECT_FILETYPE" >&2
		    echo "or" >&2
		    echo "    $GT4_INTERFACE_SHARED_OBJECT_FILE_PREFIX$GLOBUS_FLAVOR$SHARED_OBJECT_FILETYPE" >&2
		    echo "and adjust the '$GSI_AUTHZ_FILE' accordingly" >&2
		    exit 2;
		fi
	    fi
	fi
    fi

}



deinstall() {
    if [ -f "$GSI_AUTHZ_FILE" ]; then
        mv -v $GSI_AUTHZ_FILE $GSI_AUTHZ_FILE.deinstalled
    fi
}


case "$1" in
    install)
        install;
    ;;

    deinstall)
        deinstall;
    ;;

    debug)
        debug;
    ;;

    *)
        echo $"Usage: $0 {install|deinstall|debug}";
        exit 1;
esac

exit 0;
