#!/bin/bash

# BEGIN_ICS_COPYRIGHT8 ****************************************

# 

# Copyright (c) 2015, Intel Corporation

# 

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions are met:

# 

#     * Redistributions of source code must retain the above copyright notice,

#       this list of conditions and the following disclaimer.

#     * Redistributions in binary form must reproduce the above copyright

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# END_ICS_COPYRIGHT8   ****************************************

# [ICS VERSION STRING: unknown]

Usage()

{

	echo "Usage: opasorthosts < hostlist > mpi_hosts" >&2

	echo "              or" >&2

	echo "       opasorthosts --help" >&2

	echo "   --help - produce full help text" >&2

	echo "Sort the hostlist alphabetically (case insensitively) then numerically" >&2

	echo "hostnames may end in a numeric field which may optionally have leading zeros" >&2

	echo "example input:">&2

	echo "	osd04" >&2

	echo "	osd1" >&2

	echo "	compute20" >&2

	echo "	compute3" >&2

	echo "	mgmt1" >&2

	echo "	mgmt2" >&2

	echo "	login" >&2

	echo "resulting output:">&2

	echo "	compute3" >&2

	echo "	compute20" >&2

	echo "	login" >&2

	echo "	mgmt1" >&2

	echo "	mgmt2" >&2

	echo "	osd1" >&2

	echo "	osd04" >&2

	exit 2

}

if [ $# -ne 0 ]

then

	Usage

fi

# use Cntr-C as a temporary delimiter since it should never appear in a name

# sort first by the alphanumeric 1st part of name,

# then by any purely numeric last part

sed -e 's/\([0-9]*\)$/?\1/'|sort --ignore-case -k1,1 -k2,2n -t '?'|sed -e 's/?//'