#!/bin/sh

set -e

SCRIPT_DIR=`dirname $0`
RELEASE_ROOT_DIR=`cd $SCRIPT_DIR/.. && pwd`
REL_NAME={{ rel_name }}
REL_VSN={{ rel_vsn }}
ERTS_VSN={{ erts_vsn }}
REL_DIR=$RELEASE_ROOT_DIR/releases/$REL_VSN
ERL_OPTS={{ erl_opts }}

find_erts_dir() {
    local erts_dir=$RELEASE_ROOT_DIR/erts-$ERTS_VSN
    if [ -d "$erts_dir" ]; then
        ERTS_DIR=$erts_dir;
        ROOTDIR=$RELEASE_ROOT_DIR
    else
        local erl=`which erl`
        local erl_root=`$erl -noshell -eval "io:format(\\"~s\\", [code:root_dir()])." -s init stop`
        ERTS_DIR=$erl_root/erts-$ERTS_VSN
        ROOTDIR=$erl_root
    fi

}

find_sys_config() {
    local possible_sys=$REL_DIR/sys.config
    if [ -f "$possible_sys" ]; then
        SYS_CONFIG="-config $possible_sys"
    fi
}

find_erts_dir
find_sys_config
export ROOTDIR=$RELEASE_ROOT_DIR
export BINDIR=$ERTS_DIR/bin
export EMU=beam
export PROGNAME=erl
export LD_LIBRARY_PATH=$ERTS_DIR/lib:$LD_LIBRARY_PATH

cd $ROOTDIR

$BINDIR/erlexec $ERL_OPTS $SYS_CONFIG -boot $REL_DIR/$REL_NAME $@