#!/bin/sh

# Startup script for PRISM (Mac OS X)

# PRISM home directory
PRISM_DIR=/home/luser/prism

# Command to launch Java
if [ "$PRISM_JAVA" = "" ]; then
	# On OS X, we want to avoiding calling java from the /usr/bin link
	# since it causes problems with dynamic linking (DYLD_LIBRARY_PATH)
	if [ -x /usr/libexec/java_home ]; then
		PRISM_JAVA=`/usr/libexec/java_home`"/bin/java"
	else
		PRISM_JAVA=java
	fi
fi

#### Java heap size handling (either via -javamaxmem argument or PRISM_JAVAMAXMEM environment variable)

# If there is a -javamaxmem switch, use it for PRISM_JAVAMAXMEM
ARGS=( "$@" )
for ((i=0;i<${#ARGS[@]};i+=1)); do
	if [ "${ARGS[$i]}" = "-javamaxmem" -o "${ARGS[$i]}" = "--javamaxmem" ]; then
		PRISM_JAVAMAXMEM=${ARGS[$i+1]}
		PRISM_JAVAMAXMEM=`echo "$PRISM_JAVAMAXMEM" | awk /^[0-9]+[kmg]?$/`
		if [ "$PRISM_JAVAMAXMEM" = "" ]; then
			echo; echo "Error: Invalid value for -javamaxmem switch."; exit
		fi
	fi
done

# Max memory for Java
if [ "$PRISM_JAVAMAXMEM" != "" ]; then
	PRISM_JAVAMAXMEM=`echo "$PRISM_JAVAMAXMEM" | awk /^[0-9]+[kmg]?$/`
	if [ "$PRISM_JAVAMAXMEM" = "" ]; then
		echo; echo "Error: Environment variable PRISM_JAVAMAXMEM is invalid."; exit
	fi
	PRISM_JAVAMAXMEM="-Xmx$PRISM_JAVAMAXMEM"
else
	# default
	PRISM_JAVAMAXMEM="-Xmx1g"
fi

#### Java stack size handling (either via -javastack argument or PRISM_JAVASTACKSIZE environment variable)

# If there is a -javastack switch, use it for PRISM_JAVASTACKSIZE
for ((i=0;i<${#ARGS[@]};i+=1)); do
	if [ "${ARGS[$i]}" = "-javastack" -o "${ARGS[$i]}" = "--javastack" ]; then
		PRISM_JAVASTACKSIZE=${ARGS[$i+1]}
		PRISM_JAVASTACKSIZE=`echo "$PRISM_JAVASTACKSIZE" | awk /^[0-9]+[kmg]?$/`
		if [ "$PRISM_JAVASTACKSIZE" = "" ]; then
			echo; echo "Error: Invalid value for -javastack switch."; exit
		fi
	fi
done

# Stack size for Java
if [ "$PRISM_JAVASTACKSIZE" != "" ]; then
	PRISM_JAVASTACKSIZE=`echo "$PRISM_JAVASTACKSIZE" | awk /^[0-9]+[kmg]?$/`
	if [ "$PRISM_JAVASTACKSIZE" = "" ]; then
		echo; echo "Error: Environment variable PRISM_JAVASTACKSIZE is invalid."; exit
	fi
	PRISM_JAVASTACKSIZE="-Xss$PRISM_JAVASTACKSIZE"
else
	# default (4 MB)
	PRISM_JAVASTACKSIZE="-Xss4m"
fi

####


# Set up CLASSPATH:
#  - PRISM jar file (for binary versions) (gets priority)
#  - classes directory (most PRISM classes)
#  - top-level directory (for images, dtds)
#  - lib/pepa.zip (PEPA stuff)
#  - lib/*.jar (all other jars)
PRISM_CLASSPATH="$PRISM_DIR"/lib/prism.jar:"$PRISM_DIR"/classes:"$PRISM_DIR":"$PRISM_DIR"/lib/pepa.zip:"$PRISM_DIR"/lib/*

# Set up pointers to libraries
PRISM_LIB_PATH="$PRISM_DIR"/lib

# Copy library path to relevant vars
if [ "$DYLD_LIBRARY_PATH" = "" ]; then
	DYLD_LIBRARY_PATH="$PRISM_LIB_PATH"
else
	DYLD_LIBRARY_PATH="$PRISM_LIB_PATH":$DYLD_LIBRARY_PATH
fi
JAVA_LIBRARY_PATH="$PRISM_LIB_PATH"

# Export environment variables
export PRISM_DIR DYLD_LIBRARY_PATH

# Main Java class to launch
if [ "$PRISM_MAINCLASS" = "" ]; then
	PRISM_MAINCLASS=prism.PrismCL
fi

# Do we run headless? (GUI overrides this)
if [ "$PRISM_HEADLESS" = "" ]; then
	PRISM_HEADLESS=true
fi

PRISM_ICON="-Xdock:icon=$PRISM_DIR/etc/icons/p64.png"
PRISM_DOCK_NAME="-Xdock:name=PRISM"

# If debugging enabled, set up vars accordingly
if [ "$PRISM_DEBUG" != "" ]; then
	PRISM_JAVA_ARG1="$PRISM_JAVA"
	PRISM_JAVA_ARG2="$PRISM_DEBUG_ARG"
	PRISM_JAVA="$PRISM_DEBUG"
fi

#
# If environment variable PRISM_NO_EXEC is set to 'yes', use old method of starting Java.
# The default method is to use an exec call.
#
if [ "$PRISM_NO_EXEC" = "yes" ]; then
	# Run PRISM through Java as a child process (exit code of script is exit code of the java call)
	# Note: Killing this startup script will not necessarily kill the Java process
	"$PRISM_JAVA" $PRISM_JAVA_ARG1 $PRISM_JAVA_ARG2 $PRISM_JAVA_DEBUG $PRISM_JAVAMAXMEM $PRISM_JAVASTACKSIZE "$PRISM_ICON" "$PRISM_DOCK_NAME" -Djava.awt.headless=$PRISM_HEADLESS -Djava.library.path="$JAVA_LIBRARY_PATH" -classpath "$PRISM_CLASSPATH" $PRISM_MAINCLASS "$@"
else
	# (Default) Run PRISM through Java via an exec call (the shell process is replaced by the Java process)
	exec "$PRISM_JAVA" $PRISM_JAVA_ARG1 $PRISM_JAVA_ARG2 $PRISM_JAVA_DEBUG $PRISM_JAVAMAXMEM $PRISM_JAVASTACKSIZE "$PRISM_ICON" "$PRISM_DOCK_NAME" -Djava.awt.headless=$PRISM_HEADLESS -Djava.library.path="$JAVA_LIBRARY_PATH" -classpath "$PRISM_CLASSPATH" $PRISM_MAINCLASS "$@"
fi