158 lines
5.0 KiB
Python
158 lines
5.0 KiB
Python
import io
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import sys
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from contextlib import redirect_stdout
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from colorama import Style, Fore, init
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init(wrap=True)
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from bonobo import settings
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from bonobo.plugins import Plugin
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from bonobo.util.term import CLEAR_EOL, MOVE_CURSOR_UP
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class IOBuffer():
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"""
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The role of IOBuffer is to overcome the problem of multiple threads wanting to write to stdout at the same time. It
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works a bit like a videogame: there are two buffers, one that is used to write, and one which is used to read from.
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On each cycle, we swap the buffers, and the console plugin handle output of the one which is not anymore "active".
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"""
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def __init__(self):
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self.current = io.StringIO()
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self.write = self.current.write
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def switch(self):
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previous = self.current
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self.current = io.StringIO()
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self.write = self.current.write
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try:
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return previous.getvalue()
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finally:
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previous.close()
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def flush(self):
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self.current.flush()
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class ConsoleOutputPlugin(Plugin):
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"""
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Outputs status information to the connected stdout. Can be a TTY, with or without support for colors/cursor
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movements, or a non tty (pipe, file, ...). The features are adapted to terminal capabilities.
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On Windows, we'll play a bit differently because we don't know how to manipulate cursor position. We'll only
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display stats at the very end, and there won't be this "buffering" logic we need to display both stats and stdout.
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.. attribute:: prefix
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String prefix of output lines.
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"""
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def initialize(self):
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self.prefix = ''
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self.counter = 0
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self._append_cache = ''
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self.isatty = sys.stdout.isatty()
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self.iswindows = (sys.platform == 'win32')
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self._stdout = sys.stdout
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self.stdout = IOBuffer()
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self.redirect_stdout = redirect_stdout(self._stdout if self.iswindows else self.stdout)
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self.redirect_stdout.__enter__()
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def run(self):
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if self.isatty and not self.iswindows:
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self._write(self.context.parent, rewind=True)
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else:
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pass # not a tty, or windows, so we'll ignore stats output
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def finalize(self):
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self._write(self.context.parent, rewind=False)
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self.redirect_stdout.__exit__(None, None, None)
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def write(self, context, prefix='', rewind=True, append=None):
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t_cnt = len(context)
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if not self.iswindows:
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buffered = self.stdout.switch()
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for line in buffered.split('\n')[:-1]:
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print(line + CLEAR_EOL, file=sys.stderr)
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alive_color = Style.BRIGHT
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dead_color = Style.BRIGHT + Fore.BLACK
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for i in context.graph.topologically_sorted_indexes:
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node = context[i]
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name_suffix = '({})'.format(i) if settings.DEBUG.get() else ''
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if node.alive:
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_line = ''.join(
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(
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' ',
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alive_color,
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'+',
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Style.RESET_ALL,
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' ',
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node.name,
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name_suffix,
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' ',
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node.get_statistics_as_string(),
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Style.RESET_ALL,
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' ',
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)
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)
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else:
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_line = ''.join(
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(
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' ',
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dead_color,
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'-',
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' ',
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node.name,
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name_suffix,
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' ',
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node.get_statistics_as_string(),
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Style.RESET_ALL,
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' ',
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)
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)
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print(prefix + _line + '\033[0K', file=sys.stderr)
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if append:
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# todo handle multiline
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print(
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''.join(
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(
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' `-> ', ' '.join('{}{}{}: {}'.format(Style.BRIGHT, k, Style.RESET_ALL, v) for k, v in append),
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CLEAR_EOL
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)
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),
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file=sys.stderr
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)
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t_cnt += 1
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if rewind:
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print(CLEAR_EOL, file=sys.stderr)
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print(MOVE_CURSOR_UP(t_cnt + 2), file=sys.stderr)
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def _write(self, graph_context, rewind):
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if settings.PROFILE.get():
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if self.counter % 10 and self._append_cache:
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append = self._append_cache
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else:
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self._append_cache = append = (
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('Memory', '{0:.2f} Mb'.format(memory_usage())),
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# ('Total time', '{0} s'.format(execution_time(harness))),
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)
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else:
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append = ()
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self.write(graph_context, prefix=self.prefix, append=append, rewind=rewind)
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self.counter += 1
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def memory_usage():
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import os, psutil
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process = psutil.Process(os.getpid())
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return process.memory_info()[0] / float(2**20)
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