run

#!/bin/bash

SCALA_VERSION=2.10

# Figure out where it is installed
FWDIR="$(cd `dirname $0`; pwd)"

# Export this as VARYS_HOME
export VARYS_HOME="$FWDIR"

# Load environment variables from conf/varys-env.sh, if it exists
if [ -e $FWDIR/conf/varys-env.sh ] ; then
  . $FWDIR/conf/varys-env.sh
fi

if [ -z "$1" ]; then
  echo "Usage: run <varys-class> [<args>]" >&2
  exit 1
fi

if [ "$VARYS_LAUNCH_WITH_SCALA" == "1" ]; then
  if [ `command -v scala` ]; then
    RUNNER="scala"
  else
    if [ -z "$SCALA_HOME" ]; then
      echo "SCALA_HOME is not set" >&2
      exit 1
    fi
    RUNNER="${SCALA_HOME}/bin/scala"
  fi
else
  if [ `command -v java` ]; then
    RUNNER="java"
  else
    if [ -z "$JAVA_HOME" ]; then
      echo "JAVA_HOME is not set" >&2
      exit 1
    fi
    RUNNER="${JAVA_HOME}/bin/java"
  fi
  if [ -z "$SCALA_LIBRARY_PATH" ]; then
    if [ -z "$SCALA_HOME" ]; then
      echo "SCALA_HOME is not set" >&2
      exit 1
    fi
    SCALA_LIBRARY_PATH="$SCALA_HOME/lib"
  fi
fi

if [ -z "$VARYS_MEM" ] ; then
  VARYS_MEM="512m"
fi
export VARYS_MEM

# Set JAVA_OPTS to be able to load native libraries and to set heap size
JAVA_OPTS="$VARYS_JAVA_OPTS"
JAVA_OPTS+=" -Djava.library.path=$VARYS_LIBRARY_PATH"
JAVA_OPTS+=" -Xms$VARYS_MEM -Xmx$VARYS_MEM"
# Load extra JAVA_OPTS from conf/java-opts, if it exists
if [ -e $FWDIR/conf/java-opts ] ; then
  JAVA_OPTS+=" `cat $FWDIR/conf/java-opts`"
fi
export JAVA_OPTS

CORE_DIR="$FWDIR/core"
EXAMPLES_DIR="$FWDIR/examples"

# Build up classpath
CLASSPATH="$VARYS_CLASSPATH"
CLASSPATH+=":$FWDIR/conf"
CLASSPATH+=":$CORE_DIR/target/scala-$SCALA_VERSION/classes"
CLASSPATH+=":$CORE_DIR/src/main/resources"
CLASSPATH+=":$EXAMPLES_DIR/target/scala-$SCALA_VERSION/classes"
if [ -e "$FWDIR/lib_managed" ]; then
  CLASSPATH+=":$FWDIR/lib_managed/jars/*"
  CLASSPATH+=":$FWDIR/lib_managed/bundles/*"
fi
export CLASSPATH

# Figure out whether to run our class with java or with the scala launcher.
# In most cases, we'd prefer to execute our process with java because scala
# creates a shell script as the parent of its Java process, which makes it
# hard to kill the child with stuff like Process.destroy(). However, for
# the Varys shell, the wrapper is necessary to properly reset the terminal
# when we exit, so we allow it to set a variable to launch with scala.
if [ "$VARYS_LAUNCH_WITH_SCALA" == "1" ]; then
  EXTRA_ARGS=""     # Java options will be passed to scala as JAVA_OPTS
else
  CLASSPATH+=":$SCALA_LIBRARY_PATH/scala-library.jar"
  CLASSPATH+=":$SCALA_LIBRARY_PATH/scala-compiler.jar"
  CLASSPATH+=":$SCALA_LIBRARY_PATH/jline.jar"
  # The JVM doesn't read JAVA_OPTS by default so we need to pass it in
  EXTRA_ARGS="$JAVA_OPTS"
fi

exec "$RUNNER" -cp "$CLASSPATH" $EXTRA_ARGS "$@"