71 lines
2.6 KiB
Python
71 lines
2.6 KiB
Python
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# Copyright © 2018–2019 Io Mintz <io@mintz.cc>
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the “Software”),
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# to deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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# sell copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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import builtins
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import contextlib
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import inspect
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import os
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import sys
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import warnings
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from . import eval as ie_eval, exec as ie_exec
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def patch(globals=sys.modules['__main__'].__dict__):
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"""monkey patch sys.excepthook so that import expressions work at the repl
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If a line has a syntax error, import_expression.eval is attempted on it.
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If this also results in a syntax error, import_expression.exec will be run instead.
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Both cases will run in the context of the given globals dict, or if None, globals produced by statements will be saved to the __main__ module
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This function is deprecated in favor of python -m import_expression.
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"""
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warnings.warn(DeprecationWarning('import_expression.patch is deprecated in favor of python -m import_expression'))
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if not _is_tty():
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raise RuntimeError('patch() only works at the REPL, where stdin is a TTY.')
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sys.excepthook = _make_excepthook(globals)
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def _make_excepthook(globals):
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def excepthook(_, error, __):
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if (
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type(error) is not SyntaxError
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or error.lineno != 1 # we don't have all the code
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or error.text is None
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):
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return sys.__excepthook__(type(error), error, error.__traceback__)
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try:
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result = ie_eval(error.text, globals)
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except SyntaxError:
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try:
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ie_exec(error.text, globals)
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except BaseException as error:
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return sys.__excepthook__(type(error), error, error.__traceback__)
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except BaseException as error:
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return sys.__excepthook__(type(error), error, error.__traceback__)
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else:
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sys.displayhook(result)
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return excepthook
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def _is_tty():
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return os.isatty(sys.stdin.fileno())
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