#!/bin/bash

# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.


## This script replaces the default "erl" in erts-VSN/bin. This is necessary
## as escript depends on erl and in turn, erl depends on having access to a
## bootscript (start.boot). Note that this script is ONLY invoked as a side-effect
## of running escript -- the embedded node bypasses erl and uses erlexec directly
## (as it should).
##
## Note that this script makes the assumption that there is a start_clean.boot
## file available in $ROOTDIR/release/VSN.

# Determine the abspath of where this script is executing from.
ERTS_BIN_DIR=$(cd ${0%/*} && pwd)

# Now determine the root directory -- this script runs from erts-VSN/bin,
# so we simply need to strip off two dirs from the end of the ERTS_BIN_DIR
# path.
ROOTDIR=${ERTS_BIN_DIR%/*/*}

# Parse out release and erts info
START_ERL=`cat $ROOTDIR/releases/start_erl.data`
ERTS_VSN=${START_ERL% *}
APP_VSN=${START_ERL#* }

BINDIR=$ROOTDIR/erts-$ERTS_VSN/bin
EMU=beam
PROGNAME=`echo $0 | sed 's/.*\///'`
CMD="$BINDIR/erlexec"
export EMU
export ROOTDIR
export BINDIR
export PROGNAME

exec $CMD -boot $ROOTDIR/releases/$APP_VSN/start_clean ${1+"$@"}