63 lines
1.8 KiB
Python
63 lines
1.8 KiB
Python
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import sys
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from typing import Optional, TextIO, cast
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from prompt_toolkit.patch_stdout import StdoutProxy
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from prompt_toolkit.utils import (
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get_term_environment_variable,
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is_conemu_ansi,
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is_windows,
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)
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from .base import Output
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__all__ = [
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"create_output",
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]
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def create_output(
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stdout: Optional[TextIO] = None, always_prefer_tty: bool = True
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) -> Output:
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"""
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Return an :class:`~prompt_toolkit.output.Output` instance for the command
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line.
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:param stdout: The stdout object
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:param always_prefer_tty: When set, look for `sys.stderr` if `sys.stdout`
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is not a TTY. (The prompt_toolkit render output is not meant to be
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consumed by something other then a terminal, so this is a reasonable
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default.)
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"""
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if stdout is None:
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# By default, render to stdout. If the output is piped somewhere else,
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# render to stderr.
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stdout = sys.stdout
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if always_prefer_tty:
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for io in [sys.stdout, sys.stderr]:
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if io.isatty():
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stdout = io
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break
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# If the patch_stdout context manager has been used, then sys.stdout is
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# replaced by this proxy. For prompt_toolkit applications, we want to use
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# the real stdout.
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while isinstance(stdout, StdoutProxy):
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stdout = stdout.original_stdout
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if is_windows():
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from .conemu import ConEmuOutput
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from .win32 import Win32Output
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from .windows10 import is_win_vt100_enabled, Windows10_Output
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if is_win_vt100_enabled():
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return cast(Output, Windows10_Output(stdout))
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if is_conemu_ansi():
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return cast(Output, ConEmuOutput(stdout))
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else:
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return Win32Output(stdout)
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else:
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from .vt100 import Vt100_Output
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return Vt100_Output.from_pty(stdout, term=get_term_environment_variable())
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