#!/bin/sh

#
# Copyright (c) 2015 EMC Corp.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#

# tmpfs version of buildworld.sh

. ../default.cfg

[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1

[ -d /usr/src/sys ] || exit 0
[ `swapinfo | wc -l` -eq 1 ] && exit 0
[ `sysctl -n hw.physmem` -gt $(( 2 * 1024 * 1024 * 1024)) ] &&
    { echo "RAM must be clamped to 2GB or less."; exit 0; }
mount | grep -q "on $mntpoint " && umount $mntpoint
mount -t tmpfs tmpfs $mntpoint || exit 1

cd /usr/src
export MAKEOBJDIRPREFIX=$mntpoint/obj
export TMPDIR=$mntpoint/tmp
mkdir $TMPDIR
chmod 0777 $TMPDIR

p=$((`sysctl -n hw.ncpu`+ 1))
[ $p -gt 32 ] && p=32  # Arbitrary cap
make -j $p buildworld  DESTDIR=$mntpoint TARGET=amd64 TARGET_ARCH=amd64 \
    > /dev/null &
sleep $((20 *  60))
kill $!
wait

while mount | grep -q "on $mntpoint "; do
	umount $mntpoint || sleep 1
done