#!/bin/bash

#  powertop.debian: automatically sets up powertop --auto-tune on startup in Debian
#
#	Copyright (C) 2014, 2015 Leah Rowe <info@minifree.org>
#
#    This program 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.
#
#    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
#

[ "x${DEBUG+set}" = 'xset' ] && set -v
set -u -e

if [ $EUID -ne 0 ]; then
   printf "This script must be run as root\n" 
   exit 1
fi

# For Debian users.

apt-get -y install powertop

# Remove startup symlink if it exists
update-rc.d powertop remove
# Remove previous file if it exists
rm -Rf "/etc/init.d/powertop"

# write the correct commands there:
printf "#!/bin/sh\n" > "/etc/init.d/powertop"
printf "/usr/sbin/powertop --auto-tune\n" >> "/etc/init.d/powertop"

# make it executable:
chmod +x "/etc/init.d/powertop"

# Add the service to make it run automatically at boot time:
update-rc.d powertop defaults

# Run powertop now and tell the user
powertop --auto-tune
printf "Done. Run 'powertop --auto-tune' now. This will also run automatically at boot time. Run it again at any time, if needed. This has also been done for you just now.\n"