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Diffstat (limited to 'powerline/segments/common/sys.py')
| -rw-r--r-- | powerline/segments/common/sys.py | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/powerline/segments/common/sys.py b/powerline/segments/common/sys.py new file mode 100644 index 0000000..29a2459 --- /dev/null +++ b/powerline/segments/common/sys.py @@ -0,0 +1,184 @@ +# vim:fileencoding=utf-8:noet +from __future__ import (unicode_literals, division, absolute_import, print_function) + +import os + +from multiprocessing import cpu_count as _cpu_count + +from powerline.lib.threaded import ThreadedSegment +from powerline.lib import add_divider_highlight_group +from powerline.segments import with_docstring + + +cpu_count = None + + +def system_load(pl, format='{avg:.1f}', threshold_good=1, threshold_bad=2, + track_cpu_count=False, short=False): + '''Return system load average. + + Highlights using ``system_load_good``, ``system_load_bad`` and + ``system_load_ugly`` highlighting groups, depending on the thresholds + passed to the function. + + :param str format: + format string, receives ``avg`` as an argument + :param float threshold_good: + threshold for gradient level 0: any normalized load average below this + value will have this gradient level. + :param float threshold_bad: + threshold for gradient level 100: any normalized load average above this + value will have this gradient level. Load averages between + ``threshold_good`` and ``threshold_bad`` receive gradient level that + indicates relative position in this interval: + (``100 * (cur-good) / (bad-good)``). + Note: both parameters are checked against normalized load averages. + :param bool track_cpu_count: + if True powerline will continuously poll the system to detect changes + in the number of CPUs. + :param bool short: + if True only the sys load over last 1 minute will be displayed. + + Divider highlight group used: ``background:divider``. + + Highlight groups used: ``system_load_gradient`` (gradient) or ``system_load``. + ''' + global cpu_count + try: + cpu_num = cpu_count = _cpu_count() if cpu_count is None or track_cpu_count else cpu_count + except NotImplementedError: + pl.warn('Unable to get CPU count: method is not implemented') + return None + ret = [] + for avg in os.getloadavg(): + normalized = avg / cpu_num + if normalized < threshold_good: + gradient_level = 0 + elif normalized < threshold_bad: + gradient_level = (normalized - threshold_good) * 100.0 / (threshold_bad - threshold_good) + else: + gradient_level = 100 + ret.append({ + 'contents': format.format(avg=avg), + 'highlight_groups': ['system_load_gradient', 'system_load'], + 'divider_highlight_group': 'background:divider', + 'gradient_level': gradient_level, + }) + + if short: + return ret + + ret[0]['contents'] += ' ' + ret[1]['contents'] += ' ' + return ret + + +try: + import psutil + + class CPULoadPercentSegment(ThreadedSegment): + interval = 1 + + def update(self, old_cpu): + return psutil.cpu_percent(interval=None) + + def run(self): + while not self.shutdown_event.is_set(): + try: + self.update_value = psutil.cpu_percent(interval=self.interval) + except Exception as e: + self.exception('Exception while calculating cpu_percent: {0}', str(e)) + + def render(self, cpu_percent, format='{0:.0f}%', **kwargs): + return [{ + 'contents': format.format(cpu_percent), + 'gradient_level': cpu_percent, + 'highlight_groups': ['cpu_load_percent_gradient', 'cpu_load_percent'], + }] +except ImportError: + class CPULoadPercentSegment(ThreadedSegment): + interval = 1 + + @staticmethod + def startup(**kwargs): + pass + + @staticmethod + def start(): + pass + + @staticmethod + def shutdown(): + pass + + @staticmethod + def render(cpu_percent, pl, format='{0:.0f}%', **kwargs): + pl.warn('Module “psutil” is not installed, thus CPU load is not available') + return None + + +cpu_load_percent = with_docstring(CPULoadPercentSegment(), +'''Return the average CPU load as a percentage. + +Requires the ``psutil`` module. + +:param str format: + Output format. Accepts measured CPU load as the first argument. + +Highlight groups used: ``cpu_load_percent_gradient`` (gradient) or ``cpu_load_percent``. +''') + + +if os.path.exists('/proc/uptime'): + def _get_uptime(): + with open('/proc/uptime', 'r') as f: + return int(float(f.readline().split()[0])) +elif 'psutil' in globals(): + from time import time + + if hasattr(psutil, 'boot_time'): + def _get_uptime(): + return int(time() - psutil.boot_time()) + else: + def _get_uptime(): + return int(time() - psutil.BOOT_TIME) +else: + def _get_uptime(): + raise NotImplementedError + + +@add_divider_highlight_group('background:divider') +def uptime(pl, days_format='{days:d}d', hours_format=' {hours:d}h', minutes_format=' {minutes:02d}m', + seconds_format=' {seconds:02d}s', shorten_len=3): + '''Return system uptime. + + :param str days_format: + day format string, will be passed ``days`` as the argument + :param str hours_format: + hour format string, will be passed ``hours`` as the argument + :param str minutes_format: + minute format string, will be passed ``minutes`` as the argument + :param str seconds_format: + second format string, will be passed ``seconds`` as the argument + :param int shorten_len: + shorten the amount of units (days, hours, etc.) displayed + + Divider highlight group used: ``background:divider``. + ''' + try: + seconds = _get_uptime() + except NotImplementedError: + pl.warn('Unable to get uptime. You should install psutil module') + return None + minutes, seconds = divmod(seconds, 60) + hours, minutes = divmod(minutes, 60) + days, hours = divmod(hours, 24) + time_formatted = list(filter(None, [ + days_format.format(days=days) if days_format else None, + hours_format.format(hours=hours) if hours_format else None, + minutes_format.format(minutes=minutes) if minutes_format else None, + seconds_format.format(seconds=seconds) if seconds_format else None, + ])) + first_non_zero = next((i for i, x in enumerate([days, hours, minutes, seconds]) if x != 0)) + time_formatted = time_formatted[first_non_zero:first_non_zero + shorten_len] + return ''.join(time_formatted).strip() |