#!/bin/sh

#+
#  Name:
#     topcat

#  Purpose:
#     Invokes the TOPCAT application on unix

#  Description:
#     This shell script invokes the TOPCAT application.
#     It's not very complicated, but performs some argument manipulation
#     prior to invoking java with the right classpath and classname.
#
#     1. if a class path is specified using either the CLASSPATH
#        environment variable or the -classpath flag to this script,
#        it will be added to the application classpath
#
#     2. any command-line arguments which look like they are destined
#        for java itself (starting with -D or -X) will be sent to java,
#        and the others will be sent to the application

#  Requisites:
#     - java should be on the path.
#
#     - relative to the directory in which this script is installed,
#       one of the following jar files should exist and contain the
#       TOPCAT classes:
#          ./topcat-full.jar
#          ./topcat-lite.jar
#          ../../lib/topcat/topcat.jar

#  Authors:
#     MBT: Mark Taylor (Starlink)
#-

# Set locations of acceptable jar files (relative to this script).
topcat_jars="\
 ../lib/topcat/topcat.jar\
 topcat-full.jar\
 topcat-lite.jar\
"

#  Find where this script is located.
bindir="`dirname $0`"

#  Locate the application jar file. 
for j in $topcat_jars; do
   if test -z "$appjar" -a -f "$bindir/$j"; then
      appjar="$bindir/$j"
   fi
done
if test ! -f "$appjar"
then
   echo 1>&2 "Can't find topcat classes in ${bindir} - looked for:$topcat_jars"
   exit 1
fi

#  Divide the arguments into two parts: those destined as flags for
#  the java binary, and the rest.
javaArgs=""
appArgs=""
while test "$1"
do
   if echo $1 | grep -- '^-[XD]' >/dev/null; then
      javaArgs="$javaArgs "\'$1\'
   elif [ "$1" = "-classpath" -a -n "$2" ]; then
      shift
      export CLASSPATH="$1"
   else
      appArgs="$appArgs "\'$1\'
   fi
   shift
done

#  Check for Cygwin and transform paths.
case "`uname`" in
  CYGWIN*) 
    if test -n "$CLASSPATH"; then
       CLASSPATH=`cygpath --path --windows "${appjar}:$CLASSPATH"`
    else
       CLASSPATH=`cygpath --windows "${appjar}"`
    fi
  ;;
  *)
    CLASSPATH="${appjar}:${CLASSPATH}"
  ;;
esac

#  Run topcat.
cmd="java \
        $javaArgs \
        -Duk.ac.starlink.topcat.cmdname=topcat \
        -classpath \${CLASSPATH} uk.ac.starlink.topcat.Driver \
        $appArgs"
eval "$cmd"