mirror of https://github.com/docker/compose.git
54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
import sys
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from itertools import cycle
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from .multiplexer import Multiplexer
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from . import colors
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class LogPrinter(object):
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def __init__(self, containers, attach_params=None):
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self.containers = containers
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self.attach_params = attach_params or {}
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self.generators = self._make_log_generators()
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def run(self):
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mux = Multiplexer(self.generators)
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for line in mux.loop():
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sys.stdout.write(line)
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def _make_log_generators(self):
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color_fns = cycle(colors.rainbow())
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generators = []
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for container in self.containers:
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color_fn = color_fns.next()
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generators.append(self._make_log_generator(container, color_fn))
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return generators
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def _make_log_generator(self, container, color_fn):
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format = lambda line: color_fn(container.name + " | ") + line
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return (format(line) for line in self._readlines(self._attach(container)))
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def _attach(self, container):
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params = {
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'stdin': False,
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'stdout': True,
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'stderr': True,
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'logs': False,
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'stream': True,
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}
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params.update(self.attach_params)
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params = dict((name, 1 if value else 0) for (name, value) in params.items())
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return container.attach_socket(params=params)
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def _readlines(self, socket):
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for line in iter(socket.makefile().readline, b''):
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if not line.endswith('\n'):
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line += '\n'
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yield line
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socket.close()
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