#!/bin/sh
#-*-sh-*-

#
# Copyright © 2011-2013 Inria.  All rights reserved.
# See COPYING in top-level directory.
#

HWLOC_top_builddir="@HWLOC_top_builddir@"
prefix="@prefix@"
exec_prefix="@exec_prefix@"
bindir="@bindir@"
# this will be changed into $bindir/lstopo during make install
locallstopo="$HWLOC_top_builddir/utils/lstopo/lstopo"
assembler="$HWLOC_top_builddir/utils/hwloc/hwloc-assembler"

force=0
show=0
ssh=ssh
remotelstopo=lstopo
remotelstopoopts=
inputs=
inputopts=
failedhosts=
output=

error()
{
	echo $@ 2>&1
}

usage()
{
	echo "$0 [options] <output> <host1> <host2> ..."
	echo "  Gathers the topology of remote hosts and assembles them into the"
	echo "  <output> XML topology."
	echo "Options:"
	echo "  --ssh <ssh>		Use the given ssh command (and options) to connect to remote hosts"
	echo "  --lstopo-path <path>	Use the given path as the remote lstopo command"
	echo "  --lstopo-opts <opts>	Pass the given lstopo options when gathering remote topologies"
	echo "  --show			Display the resulting topology before exit"
	echo "  -f --force		Ignore failure to load a remote host topology"
}

while test $# -gt 0 ; do
	case "$1" in
	--ssh)
		ssh="$2"
		shift
		;;
	--lstopo-path)
		remotelstopo="$2"
		shift
		;;
	--lstopo-opts)
		remotelstopoopts="$2"
		shift
		;;
	-s|--show)
		show=1
		;;
	-f|--force)
		force=1
		;;
	-h)
		usage
		exit 0
		;;
	-*)
		error "Unrecognized option: $1"
		usage
		exit 1
		;;
	*)
		if test -z "$output" ; then
			output="$1"
		else
			file=`mktemp --tmpdir hwloc-assembler-remote.$1.XXXXXXXX.xml`
			echo -n "Exporting host $1 topology to $file ..."
			if "$ssh" "$1" "$remotelstopo" "$remotelstopoopts" -.xml > $file ; then
				echo "done"
				inputs="$inputs $file"
				inputopts="$inputopts --name $1 $file"
			else
				echo "failed!"
				rm "$file"
				failedhosts="$failedhosts $1"
				test $force -eq 0 && exit -1;
			fi
		fi
		;;
	esac
	shift
done

if test -z "$output" ; then
	error "Missing output filename"
	rm -f $inputs
	usage
	exit 1
fi

test $force -eq 1 && assembleropts="$assembleropts -f"

echo "$assembler" $assembleropts "$output" $inputopts
"$assembler" $assembleropts "$output" $inputopts
ret=$?

rm -f $inputs

if test $ret -eq 0 ; then
	echo "Assembled into $output"
else
	echo "Failed to assemble into $output"
fi

if test -n "$failedhosts" ; then
	error "Failed to contact hosts:$failedhosts"
fi

if test $ret -eq 0 -a $show -eq 1 ; then "$locallstopo" -i "$output" ; fi
