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#!/bin/sh
#
# Coniguration script for standalone XMLC release.
#
#  xmlc-config -java javacmd [-javac javaccmd] [xmlc-home-dir]
#
# This script edits all files in the XMLC standalone distribution that contain
# absolutes paths to have the correct location on systems on which they
# are installed.
#
#
# The script *must* be run in the XMLC_HOME directory to be edited.  The
# optional argument xmlc-home-dir specifies the value to use for the XMLC_HOME
# directory.  If its not specified, its assumed to be the current directory.
# This is normally not needed, it allows pre-configuring XMLC for installation
# in another directory
#
# The script maybe rerun if necessary, which is useful if the installation
# location must be moved.
#
# Several options are available for specifying the location of external
# packages. They take absolute file paths as arguments.  On windows, this
# should be specified using the CygWin windows naming syntax of
# //drive/file/path.  For example: //C/mystuff/java1.2.
#
# The options are:
#   o -java javacmd - Specifies the full path to the java command to use to
#     run XMLC.
#
#   o -javac javaccmd - Specifies the full path to the java compiler command to
#     use to compile the results of XMLC.  If not specified `javac' in
#     the same directory as the java command is used.
#
# Build process overrides the jar location using XMLC_CLASSES env var.
#

# Usage msg and exit
usage() {
    echo "Usage: xmlc-config -java javacmd [-javac javaccmd] [xmlc-home-dir]" >&2
    exit 1
}

#
# Entry point.
#
JAVA=""
JAVAC=""

while [ $# -gt 0 ] ;do
    case $1 in 
        -java)
            shift
            JAVA="$1"
            shift;;
        -javac)
            shift
            JAVAC="$1"
            shift;;
        --)
            shift
            break;;
        -*)
            usage;;
         *)
            break;;
    esac
done
case $# in
    0)
        XMLC_HOME=`pwd`;;
    1)
        XMLC_HOME="$1";;
    *)
        usage;;
esac

XMLC_BIN="${XMLC_HOME}/bin"
XMLC_DIST_BIN="${XMLC_HOME}/dist/bin"
XMLC_CLASSES=${XMLC_CLASSES:="${XMLC_HOME}/lib/xmlc.jar"}
XMLC_SUPPORT_CLASSES="${XMLC_HOME}/lib/xmlc-support.jar"

# Check that we are in the right place.
CHECK_FILE=${XMLC_DIST_BIN}/xmlc.in
if [ ! -r "${CHECK_FILE}" ] ; then
    echo "Error: '${CHECK_FILE}' not found" >&2
    echo "       Current directory must be the XMLC home directory or" >&2
    echo "       XMLC home directory should be specified on the command line" >&2
    exit 1
fi

# Check for existance of java command.
if [ "X${JAVA}" = "X" ] ; then
    echo "Error: must specify -java" >&2
    exit 1
fi
if [ ! -r "${JAVA}" ] ; then
    echo "Error: '${JAVA}' not found" >&2
    exit 1
fi

# Default and check javac command
if [ "X${JAVAC}" = "X" ] ; then
    JAVAC="`dirname ${JAVA}`/javac"
fi
if [ ! -r "${JAVAC}" ] ; then
    echo "Error: '${JAVAC}' not found" >&2
    exit 1
fi

# Need JDK runtime in case jikes is used
JDKDIR="`dirname ${JAVA}`/.."

# Generate command
rm -f ${XMLC_BIN}/xmlc
mkdir -p ${XMLC_BIN}
sed -e "s|@XMLC_CLASSES@|${XMLC_CLASSES}|g" \
    -e "s|@XMLC_SUPPORT_CLASSES@|${XMLC_SUPPORT_CLASSES}|g" \
    -e "s|@JAVA@|${JAVA}|g" \
    -e "s|@JAVAC@|${JAVAC}|g" \
    -e "s|@JDKDIR@|${JDKDIR}|g" \
	    < ${XMLC_DIST_BIN}/xmlc.in > ${XMLC_BIN}/xmlc || rm -f ${XMLC_BIN}/xmlc
chmod a+rx,a-w ${XMLC_BIN}/xmlc