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#! /bin/sh
# $Id$
#
# Encapsulates set/access of a components file, which records set of
# components that were built in a library. Intended to be used by
# Makefiles and scripts. See ACE_wrappers/ace/Makefile for an example.
#
usage="usage: $0 --ace | --orbsvcs | --tao | --pace \
[--remove | --set \" <components list> \"]"
####
#### Make sure that PACE_ROOT, ACE_ROOT, and TAO_ROOT are set.
####
if [ ! "$ACE_ROOT" ]; then
echo $0': your ACE_ROOT environment variable is not set!' 1>&2
exit -1
fi
if [ ! "$TAO_ROOT" ]; then
TAO_ROOT=$ACE_ROOT/TAO
export TAO_ROOT
fi
if [ ! "$PACE_ROOT" ]; then
PACE_ROOT=$ACE_ROOT/PACE
export PACE_ROOT
fi
####
#### Process command line arguments.
####
if [ $# -ge 1 ]; then
case $1 in
--ace) components_file=$ACE_ROOT/ace/ACE_COMPONENTS.list ;;
--orbsvcs)
components_file=$TAO_ROOT/orbsvcs/orbsvcs/ORBSVCS_COMPONENTS.list ;;
--tao) components_file=$TAO_ROOT/tao/TAO_COMPONENTS.list ;;
--pace) components_file=$PACE_ROOT/PACE_COMPONENTS.list ;;
*) echo $usage; exit -1 ;;
esac
shift
else
echo $usage
exit -1
fi
set_components=0
if [ $# -ge 1 ]; then
if [ $1 = '--set' ]; then
set_components=1
shift
if [ $# -eq 1 ]; then
components=$1
shift
else
echo $usage
exit -1
fi
elif [ $1 = '--remove' ]; then
rm -f $components_file
else
echo $usage
exit -1
fi
fi
if [ $set_components -eq 1 ]; then
####
#### Update the components file, if it has changed since last set.
####
if [ -f $components_file ]; then
if echo "$components" | diff - $components_file > /dev/null; then
:
else
echo "$components" > $components_file
fi
else
echo "$components" > $components_file
fi
else
####
#### Access the contents of the components file, if it exists.
####
if [ -f $components_file ]; then
cat $components_file
fi
fi
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