#!/bin/sh
# --- SDE-COPYRIGHT-NOTE-BEGIN ---
# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
#
# Filename: bin/sde
# Copyright (C) 2006 - 2010 The OpenSDE Project
#
# More information can be found in the files COPYING and README.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License. A copy of the
# GNU General Public License can be found in the file COPYING.
# --- SDE-COPYRIGHT-NOTE-END ---

set -e

# stand-alone simplified minimal functions
#
echo_info() {
	echo "-> $@" >&2
}

echo_abort() {
	local errno="$1"; shift
	echo "!> ERROR: $@" >&2
	exit "$errno"
}

# Early checking of the system
#
if ! type readlink > /dev/null 2>&1; then
	echo_abort 1 '`readlink` tool not found'
fi

readlink -f /bin/sh 2>&1 > /dev/null
[ $? -eq 0 ] ||
	echo_abort 1 '`readlink` doesnt support -f, please update it.'

if [ "x-x" = "x${1:-}" ]; then
	XTRACE=yes
	PS4='+${BASH_SOURCE:+$BASH_SOURCE:}$LINENO> '
	shift
	set -x
else
	XTRACE=
fi

# find libsde.in
#
if [ -z "$SDEROOT" ]; then
	# finding the root of the tree where we are stand
	#
	SDEROOT=$( pwd -P )
	while [ "$SDEROOT" -a ! -r "$SDEROOT/lib/libsde.in" ]; do
		SDEROOT="${SDEROOT%/*}"
	done
fi

# if libsde.in was not found, try a fallback
#
if [ ! -r "$SDEROOT/lib/libsde.in" ]; then
	SDEROOT="$( readlink -f "$0" )"; SDEROOT="${SDEROOT%/bin/sde}"

	[ -r "$SDEROOT/lib/libsde.in" ] ||
		echo_abort 1 'SDEROOT not found.'
fi

# switching to the right sde wrapper (SDEROOT specific)
#
if [ "$( readlink -f "$0" )" != "$SDEROOT/bin/sde" ]; then
	if [ "--loop" = "${1:-}" ]; then
		echo_abort 2 'loop detected, abort.'
	fi

	set -- ${XTRACE:+-x }--loop "$@"

	if [ -x "$SDEROOT/run.sh" ]; then
		exec "$SDEROOT/run.sh" sde --run-loop "$@"
	else
		exec "$SDEROOT/bin/sde" "$@"
	fi
elif [ -x "$SDEROOT/run.sh" ]; then
	if [ "yes" = "${SDE_VIA_RUN_SH:-}" ]; then
		# good
		while [ $# -gt 0 ]; do
			case "$1" in
			--run-loop|--loop)
				;;
			*)
				break ;;
			esac
			shift
		done
	elif [ "--run-loop" = "${1:-}" ]; then
		echo_abort 2 'loop detected, abort.'
	else
		if [ "--loop" = "${1:-}" ]; then
			shift
		fi

		exec "$SDEROOT/run.sh" sde ${XTRACE:+-x }--run-loop "$@"
	fi
elif [ "--loop" = "${1:-}" ]; then
	shift
fi

# load corresponding library for sh scripts
#
. "$SDEROOT/lib/libsde.in"
. "$SDEROOT/lib/sde-wrapper-command.in"

if [ $# -eq 0 -o "$1" = "--help" ]; then
	sde_wrapper_command_help
else
	command="$( sde_wrapper_command "$1" )"
	if [ -z "$command" ]; then
		# unknown command
		echo_error "Command '$COLOR_INFO$1$COLOR_NORMAL' not understood."
		sde_wrapper_command_help
	else
		shift;

		[ -x "$SDEROOT/bin/sde-$command" ] ||
			echo_abort 2 "Can't execute '$COLOR_INFO$SDEROOT/bin/sde-$command$COLOR_NORMAL', sorry."

		exec "$SDEROOT/bin/sde-$command" "$@"
	fi
fi
exit 1