#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2016-2020 The Debian Live team
## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
##
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.


Check_architectures ()
{
	local ARCHITECTURES
	ARCHITECTURES="${@}" #must be on separate line to 'local' declaration to avoid error
	local VALID=false

	local ARCHITECTURE
	for ARCHITECTURE in ${ARCHITECTURES}
	do
		if [ "$(echo ${LB_ARCHITECTURE} | grep ${ARCHITECTURE})" ]
		then
			VALID=true
			break
		fi
	done

	if [ "${ARCHITECTURES}" = "${LB_BOOTSTRAP_QEMU_ARCHITECTURE}" ]
	then
		VALID=true

		if [ ! -e "${LB_BOOTSTRAP_QEMU_STATIC}" ]
		then
			Echo_warning "skipping %s, qemu-static binary ${LB_BOOTSTRAP_QEMU_ARCHITECTURE} was not found"
			VALID=false
		fi

		if [ ! -x "${LB_BOOTSTRAP_QEMU_STATIC}" ]
		then
			Echo_warning "skipping %s, qemu-static binary ${LB_BOOTSTRAP_QEMU_STATIC} is not executable"
			VALID=false
		fi

	fi

	if ! $VALID
	then
		Echo_warning "skipping %s, foreign architecture(s)." "${0}"
		exit 0
	fi
}

Check_crossarchitectures ()
{
	local HOST
	if command -v dpkg >/dev/null
	then
		HOST="$(dpkg --print-architecture)"
	else
		HOST="$(uname -m)"
	fi

	local CROSS
	case "${HOST}" in
		amd64|i386|x86_64)
			CROSS="amd64 i386"
			;;

		powerpc|ppc64)
			CROSS="powerpc ppc64"
			;;

		*)
			CROSS="${HOST}"
			;;
	esac

	if [ "${LB_ARCHITECTURE}" = "${LB_BOOTSTRAP_QEMU_ARCHITECTURE}" ]
	then

		if [ ! -e "${LB_BOOTSTRAP_QEMU_STATIC}" ]
		then
			Echo_warning "skipping %s, qemu-static binary ${LB_BOOTSTRAP_QEMU_ARCHITECTURE} was not found"
			exit 0
		fi

		if [ ! -x "${LB_BOOTSTRAP_QEMU_STATIC}" ]
		then
			Echo_warning "skipping %s, qemu-static binary ${LB_BOOTSTRAP_QEMU_STATIC} is not executable"
			exit 0
		fi
		return
	fi


	Check_architectures "${CROSS}"
}