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https://gitflic.ru/project/openide/openide.git
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f79a93b7c6
(cherry picked from commit bb444ad59a7a61ab1cab46eacda1eecf917848fc) GitOrigin-RevId: 188b265d02d446e2f77ba699b2aa8f0c57064a09
126 lines
3.5 KiB
Python
126 lines
3.5 KiB
Python
from _pydevd_bundle import pydevd_constants
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IS_PY3K = pydevd_constants.IS_PY3K
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class IORedirector:
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'''
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This class works to wrap a stream (stdout/stderr) with an additional redirect.
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'''
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def __init__(self, original, new_redirect, wrap_buffer=False):
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'''
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:param stream original:
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The stream to be wrapped (usually stdout/stderr, but could be None).
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:param stream new_redirect:
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Usually IOBuf (below).
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:param bool wrap_buffer:
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Whether to create a buffer attribute (needed to mimick python 3 s
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tdout/stderr which has a buffer to write binary data).
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'''
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self._redirect_to = (original, new_redirect)
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if wrap_buffer and hasattr(original, 'buffer'):
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self.buffer = IORedirector(original.buffer, new_redirect.buffer, False)
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def write(self, s):
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# Note that writing to the original stream may fail for some reasons
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# (such as trying to write something that's not a string or having it closed).
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for r in self._redirect_to:
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if hasattr(r, 'write'):
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r.write(s)
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def isatty(self):
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for r in self._redirect_to:
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if hasattr(r, 'isatty'):
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return r.isatty()
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return False
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def flush(self):
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for r in self._redirect_to:
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if hasattr(r, 'flush'):
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r.flush()
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def __getattr__(self, name):
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for r in self._redirect_to:
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if hasattr(r, name):
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return r.__getattribute__(name)
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raise AttributeError(name)
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class IOBuf:
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'''This class works as a replacement for stdio and stderr.
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It is a buffer and when its contents are requested, it will erase what
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it has so far so that the next return will not return the same contents again.
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'''
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def __init__(self):
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self.buflist = []
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import os
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self.encoding = os.environ.get('PYTHONIOENCODING', 'utf-8')
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def getvalue(self):
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b = self.buflist
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self.buflist = [] # clear it
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return ''.join(b) # bytes on py2, str on py3.
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def write(self, s):
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if not IS_PY3K:
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if isinstance(s, unicode):
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# can't use 'errors' as kwargs in py 2.6
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s = s.encode(self.encoding, 'replace')
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else:
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if isinstance(s, bytes):
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s = s.decode(self.encoding, errors='replace')
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self.buflist.append(s)
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def isatty(self):
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return False
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def flush(self):
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pass
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def empty(self):
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return len(self.buflist) == 0
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class _RedirectionsHolder:
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_stack_stdout = []
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_stack_stderr = []
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def start_redirect(keep_original_redirection=False, std='stdout'):
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'''
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@param std: 'stdout', 'stderr', or 'both'
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'''
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import sys
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buf = IOBuf()
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if std == 'both':
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config_stds = ['stdout', 'stderr']
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else:
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config_stds = [std]
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for std in config_stds:
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original = getattr(sys, std)
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stack = getattr(_RedirectionsHolder, '_stack_%s' % std)
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stack.append(original)
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if keep_original_redirection:
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setattr(sys, std, IORedirector(getattr(sys, std), buf))
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else:
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setattr(sys, std, buf)
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return buf
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def end_redirect(std='stdout'):
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import sys
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if std == 'both':
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config_stds = ['stdout', 'stderr']
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else:
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config_stds = [std]
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for std in config_stds:
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stack = getattr(_RedirectionsHolder, '_stack_%s' % std)
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setattr(sys, std, stack.pop())
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