# Copyright (C) 2016 Free Software Foundation, Inc.

# This file is part of DejaGnu.

#

# DejaGnu 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; either version 3 of the License, or

# (at your option) any later version.

#

# DejaGnu is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with DejaGnu; if not, write to the Free Software Foundation,

# Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.

# This file requires a slightly modified dmucs, which has been

# modified to support multiple architectures for toolchain

# testing. DMUCS sends the CPU load to a server, which we can query

# using the 'gethost' command to get the next available slave for a

# remote test based on which one is the least busy. The code for this

# enhanced DMUCS is at: http://git.linaro.org/git/toolchain/dmucs.git

proc dmucs_gethost { server arch } {

    # gethost in debug mode returns this output:

    # --node and --arch are unique to the Linaro branch of DMUCS

    #

    # Writing -->host 127.0.1.1 <-- to the server

    # Calling Sgets

    # Got -->10.6.1.24<-- from the server

    # tmp is -->DISTCC_HOSTS=10.6.1.24/100<--

    set slave ""

    spawn gethost -s $server --node --arch $arch

    expect {

	# This is the IP number we want.

	"^\[0-9\]*\.\[0-9\]*\.\[0-9\]*\.\[0-9\]*" {

	    set pos [expr {[string first "/" $expect_out(buffer)] - 1}]

	    set slave [string range $expect_out(buffer) 0 $pos]

	}

	timeout {

	    perror "DMUCS gethost command timed out"

	}

	eof {

	    perror "Failed to connect to DMUCS server"

	}

    }

    return $slave

}