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Release assembler for Erlang/OTP Releases

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relx priv templates bin
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priv/templates/bin 

#!/bin/sh



set -e



SCRIPT=$(readlink $0 || true)

if [ -z $SCRIPT ]; then

    SCRIPT=$0

fi;

SCRIPT_DIR="$(cd `dirname "$SCRIPT"` && pwd -P)"

RELEASE_ROOT_DIR="$(cd "$SCRIPT_DIR/.." && pwd -P)"

REL_NAME="{{ rel_name }}"

REL_VSN="{{ rel_vsn }}"

ERTS_VSN="{{ erts_vsn }}"

REL_DIR="$RELEASE_ROOT_DIR/releases/$REL_VSN"

ERL_OPTS="{{ erl_opts }}"

export ESCRIPT_NAME="${ESCRIPT_NAME-$SCRIPT}"



find_erts_dir() {

    __erts_dir="$RELEASE_ROOT_DIR/erts-$ERTS_VSN"

    if [ -d "$__erts_dir" ]; then

        ERTS_DIR="$__erts_dir";

        ROOTDIR="$RELEASE_ROOT_DIR"

    else

        __erl="$(which erl)"

        code="io:format(\"~s\", [code:root_dir()]), halt()."

        __erl_root="$("$__erl" -boot no_dot_erlang -noshell -eval "$code")"

        ERTS_DIR="$__erl_root/erts-$ERTS_VSN"

        ROOTDIR="$__erl_root"

    fi

}



find_sys_config() {

    __possible_sys="$REL_DIR/sys.config"

    if [ -f "$__possible_sys" ]; then

        SYS_CONFIG="$__possible_sys"

    else 

       if [ -L "$__possible_sys".orig ]; then

          mv "$__possible_sys".orig "$__possible_sys"  

          SYS_CONFIG="$__possible_sys"

       fi

    fi

}



find_vm_args() {

    __possible_vm_args="$REL_DIR/vm.args"

    if [ -f "$__possible_vm_args" ]; then

        VM_ARGS="$__possible_vm_args"

    else 

       if [ -L "$__possible_vm_args".orig ]; then

          mv "$__possible_vm_args".orig "$__possible_vm_args"  

          VM_ARGS="$__possible_vm_args"

       fi

    fi

}



find_erts_dir

find_sys_config

find_vm_args

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"

ERTS_LIB_DIR="$ERTS_DIR/../lib"

[ -f "$REL_DIR/$REL_NAME.boot" ] && BOOTFILE="$REL_NAME" || BOOTFILE=start

cd "$ROOTDIR"



# Save extra arguments

ARGS="$@"



# Build arguments for erlexec

set -- "$ERL_OPTS"

[ "$SYS_CONFIG" ] && set -- "$@" -config "$SYS_CONFIG"

[ "$VM_ARGS" ] && set -- "$@" -args_file "$VM_ARGS"

set -- "$@" -boot_var ERTS_LIB_DIR "$ERTS_LIB_DIR" -boot "$REL_DIR/$BOOTFILE" "$ARGS"



# Boot the release

exec $BINDIR/erlexec $@