#!/bin/bash
# -----------------------------------------------------------------------------
# Start Script for RingoJS
#
# Environment Variables
#
#   RINGO_OPTS   (Optional) Default Ringo command line args
#   RINGO_HOME   (Optional) Ringo installation directory
#   JAVA_HOME    (Optional) JDK installation directory
# -----------------------------------------------------------------------------

#
# find_ringo_home - mostly an emulation of GNU's `readlink -f`
#
function find_ringo_home() {
    # save original working directory
    ORIG_PWD="$(pwd -P)"

    # walk the links! we cd into the dir of the target binary, read the link,
    # make this link our new target, and start over. we stop as soon as the
    # target is no link anymore.
    T="$1"
    while true; do
        cd "$(dirname "$T")"
        T="$(basename "$T")"
        if [ ! -L "$T" ]; then break; fi
        T="$(readlink "$T")"
    done

    # the final target is in bin/, change to parent and echo as home
    cd ..
    echo "$(pwd -P)"

    # restore original working directory
    cd "$ORIG_PWD"
}

if [ -z "$RINGO_HOME" ]; then
    RINGO_HOME="$(find_ringo_home "$0")"
fi

if [ "$OSTYPE" == 'cygwin' ]; then
    RINGO_HOME=`cygpath -w $RINGO_HOME`
fi

if [ -z "$JAVA_HOME" ] ; then
    java_cmd='java'
else
    if [ "$OSTYPE" == 'cygwin' ]; then
        java_cmd="`cygpath -u "$JAVA_HOME"`/bin/java"
    else
        java_cmd="$JAVA_HOME/bin/java"
    fi
fi

# prepend RINGO_OPTS to parameters
set -- $RINGO_OPTS "$@"

declare -a java_args
declare -a ringo_args
declare -a app_args

# Split out options for the JVM or Ringo runtime
while [ $# -gt 0 ]
do
    case "$1" in
    # Options starting with '-J' go to the JVM
    -J*)
        java_args=("${java_args[@]}" "${1:2}") ;;
    # Options starting with '-R' go to Ringo, useful for
    # symlinked commands below that define their own options
    -R*)
        ringo_args=("${ringo_args[@]}" "${1:2}") ;;
     # Other opts go to Ringo or whatever the command is
     -*)
        app_args=("${app_args[@]}" "$1") ;;
     # Abort processing on first non-opt arg
     *) break ;;
    esac
    shift
done

# Append the rest of the arguments to app_args
app_args=("${app_args[@]}" "$@")

# arg0-based toggling of special behaviour
case "$(basename $0)" in
    ringo-admin)
        app_args=("ringo/admin/main" "${app_args[@]}") ;;
    ringo-web)
        app_args=("ringo/webapp" "${app_args[@]}") ;;
    ringo-doc)
        app_args=("$RINGO_HOME/apps/jsdoc/doc.js" "${app_args[@]}") ;;
    narwhal)
        app_args=("--legacy-mode" "${app_args[@]}") ;;
esac

# To put $app_args back into the position arguments $1, $2 etc
# set -- "${app_args[@]}"

# prepend rhino to bootclasspath to work around openjdk bug
java_args=("${java_args[@]}" "-Xbootclasspath/p:$RINGO_HOME/lib/js.jar")

# echo "java_args ${java_args[@]}"
# echo "ringo_args ${ringo_args[@]}"
# echo "app_args ${app_args[@]}"

exec "$java_cmd" "${java_args[@]}" \
    -jar "$RINGO_HOME/run.jar" \
    "${ringo_args[@]}" \
    "${app_args[@]}"