#!/bin/bash
#
#  Script to manage tog-pegasus alternatives for multi-lib platforms
#
#  Jason Vas Dias<jvdias@redhat.com>, Red Hat, Inc. June 2006
#
#  Usage:
#  pegasus_arch_alternatives 
#  ( --list [pfx]  | 
#    ( [ devel | test ] [ -64 ] [ -32 ] [ --remove ] [ --display ] ) 
#  )
#    no args  :  set up library and binary 'pegasus' alternatives
#    --list   :  list 64/32-bit alternatives, with optional prefix pfx  
#    devel    :  set up the 'pegasus-devel' alternative
#    test     :  set up the 'pegasus-test' alternative
#    -64      :  select 64-bit alternatives
#    -32      :  select 32-bit alternatives
#    --remove :  remove all pegasus alternatives
#    --display:  display the pegasus alternatives
#
ALT='pegasus'
LINK=/usr/sbin/cimserver
SLAVES=(/usr/{bin/{cimmof,cimmofl,cimprovider,osinfo,wbemexec},sbin/{cimauth,cimconfig,cimprovagt,cimuser,repupgrade}})
DEVEL_LINK=/usr/share/Pegasus/samples/mak/config.mak 
TEST_LINK=/usr/share/Pegasus/test/Makefile
#
# Handle listing arg:
#
if [ "$1" = '--list' ]; then
    pfx='';
    if [ $# -gt 1 ]; then
	pfx=$2' ';
    fi;
    for f in $LINK ${SLAVES[@]} $DEVEL_LINK $TEST_LINK; do
	echo ${pfx}$f;
    done;
    exit 0;
fi
#
# Ensure that files and alternatives are correctly in-sync for architecture:
#
ARCH=`/bin/uname -i`
case $ARCH in
    # return for arches that have no alternatives
    ia64 )
	# nothing to be done - shipped without binary suffix
	exit 0;
	;;
    i386 | ppc | s390 )
	# shipped with -32 suffix, but no alternatives possible - move:
    	for f in $LINK ${SLAVES[@]} $DEVEL_LINK $TEST_LINK; 
	do
	  if [ -f ${f}-32 ] ; then
	      /bin/mv -f ${f}-32 $f; 
	  fi;
	done;
	exit 0;
	;;
    x86_64 | ppc64 | s390x )
	# continue
	;;
    *)
	# unhandled architecture
	exit 1;
	;;
esac;
if [ "$1" = 'devel' ] || [ "$1" = 'test' ]; then
    ALT='pegasus-'$1;
    shift;
    SLAVES=();
    if [ "$ALT" = 'pegasus-devel' ]; then
	LINK=$DEVEL_LINK;
    else
	LINK=$TEST_LINK;
    fi;
fi;
#
# Ensure that whatever alternatives can be installed, are installed,
# and those that can't be installed are removed:
#
alternatives="`/usr/sbin/alternatives --display $ALT 2>/dev/null`";
slaves64=''
slaves32=''	    
installed64=1;
installed32=1;	
for f in $LINK ${SLAVES[@]}; do
    if [ $installed64 -eq 1 ] && [ -f ${f}-64 ]; then 
	slaves64=${slaves64}'--slave '$f' '${f##*/}' '${f}-64' ';
    else
	installed64=0;
	continue;
    fi;
    if [ $installed32 -eq 1 ] &&  [ -f ${f}-32 ]; then
	slaves32=${slaves32}'--slave '$f' '${f##*/}' '${f}-32' ';
    else
	installed32=0;
	continue;
    fi;	    
    if [ -e $f ] && [ ! -L $f ]; then
	/bin/rm -f $f;
    fi;
done
if [ $installed64 -eq 0 ]; then
    /usr/sbin/alternatives --remove $ALT ${LINK}-64 >/dev/null 2>&1 || :;
elif ! echo "$alternatives" | /bin/egrep -q "^${LINK}-64"; then
    /usr/sbin/alternatives --install $LINK $ALT ${LINK}-64 50 $slaves64;
fi;
if [ $installed32 -eq 0 ]; then
    /usr/sbin/alternatives --remove $ALT ${LINK}-32 >/dev/null 2>&1 || :;
elif  ! echo "$alternatives" | /bin/egrep -q "^${LINK}-32"; then
    /usr/sbin/alternatives --install $LINK $ALT ${LINK}-32 50 $slaves32;
fi;
#
# Handle optional user args
#
if [ -n "$1" ]; then
    case $1 in
	-64 )
	    if [ $installed64 -eq 1 ]; then
		/usr/sbin/alternatives --set $ALT ${LINK}-64;
		if [ "$ALT" = 'pegasus' ]; then
		    /usr/sbin/alternatives --set pegasus-devel ${DEVEL_LINK}-64 >/dev/null 2>&1;
    		    /usr/sbin/alternatives --set pegasus-test ${TEST_LINK}-64 >/dev/null 2>&1;
		fi;
	    fi
	    ;;
	-32 )
	    if [ $installed32 -eq 1 ]; then
		/usr/sbin/alternatives --set $ALT ${LINK}-32;
    		if [ "$ALT" = 'pegasus' ]; then
		    /usr/sbin/alternatives --set pegasus-devel ${DEVEL_LINK}-32 >/dev/null 2>&1;
    		    /usr/sbin/alternatives --set pegasus-test ${TEST_LINK}-32 >/dev/null 2>&1;
		fi;
	    fi
	    ;;
	--remove )
	    /usr/sbin/alternatives --remove $ALT ${LINK}-32 >/dev/null 2>&1;
	    /usr/sbin/alternatives --remove $ALT ${LINK}-64 >/dev/null 2>&1;
	    if [ "$ALT" = 'pegasus' ]; then
		/usr/sbin/alternatives --remove pegasus-devel ${DEVEL_LINK}-32 >/dev/null 2>&1;
		/usr/sbin/alternatives --remove pegasus-devel ${DEVEL_LINK}-64 >/dev/null 2>&1;
    		/usr/sbin/alternatives --remove pegasus-test  ${TEST_LINK}-32 >/dev/null 2>&1;
		/usr/sbin/alternatives --remove pegasus-test  ${TEST_LINK}-64 >/dev/null 2>&1;
	    fi;
	    ;;
	--display )
	    /usr/sbin/alternatives --display $ALT;
	    if [ "$ALT" = 'pegasus' ]; then
		/usr/sbin/alternatives --display pegasus-devel;
    		/usr/sbin/alternatives --display pegasus-test;
	    fi
	    ;;
	*)
	    exit 1;	    
	    ;;
    esac;
fi;
exit 0;