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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This script is a simple wrapper which prefixes each i3status line with custom
# information. It is a python reimplementation of:
# http://code.stapelberg.de/git/i3status/tree/contrib/wrapper.pl
#
# To use it, ensure your ~/.i3status.conf contains this line:
# output_format = "i3bar"
# in the 'general' section.
# Then, in your ~/.i3/config, use:
# status_command i3status | ~/i3status/contrib/wrapper.py
# In the 'bar' section.
#
# In its current version it will display the cpu frequency governor, but you
# are free to change it to display whatever you like, see the comment in the
# source code below.
#
# © 2012 Valentin Haenel <valentin.haenel@gmx.de>
#
# This program is free software. It comes without any warranty, to the extent
# permitted by applicable law. You can redistribute it and/or modify it under
# the terms of the Do What The Fuck You Want To Public License (WTFPL), Version
# 2, as published by Sam Hocevar. See http://sam.zoy.org/wtfpl/COPYING for more
# details.
import sys
import json
def get_governor():
""" Get the current governor for cpu0, assuming all CPUs use the same. """
with open('/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor') as fp:
return fp.readlines()[0].strip()
def print_line(message):
""" Non-buffered printing to stdout. """
sys.stdout.write(message + '\n')
sys.stdout.flush()
def read_line():
""" Interrupted respecting reader for stdin. """
# try reading a line, removing any extra whitespace
try:
line = sys.stdin.readline().strip()
# i3status sends EOF, or an empty line
if not line:
sys.exit(3)
return line
# exit on ctrl-c
except KeyboardInterrupt:
sys.exit()
if __name__ == '__main__':
# Skip the first line which contains the version header.
print_line(read_line())
# The second line contains the start of the infinite array.
print_line(read_line())
while True:
line, prefix = read_line(), ''
# ignore comma at start of lines
if line.startswith(','):
line, prefix = line[1:], ','
j = json.loads(line)
# insert information into the start of the json, but could be anywhere
# CHANGE THIS LINE TO INSERT SOMETHING ELSE
j.insert(0, {'full_text' : '%s' % get_governor(), 'name' : 'gov'})
# and echo back new encoded json
print_line(prefix+json.dumps(j))
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