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37 lines
1.3 KiB
37 lines
1.3 KiB
6 months ago
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"""
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Activate virtualenv for current interpreter:
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Use exec(open(this_file).read(), {'__file__': this_file}).
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This can be used when you must use an existing Python interpreter, not the virtualenv bin/python.
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""" # noqa: D415
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from __future__ import annotations
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import os
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import site
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import sys
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try:
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abs_file = os.path.abspath(__file__)
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except NameError as exc:
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msg = "You must use exec(open(this_file).read(), {'__file__': this_file}))"
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raise AssertionError(msg) from exc
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bin_dir = os.path.dirname(abs_file)
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base = bin_dir[: -len("Scripts") - 1] # strip away the bin part from the __file__, plus the path separator
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# prepend bin to PATH (this file is inside the bin directory)
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os.environ["PATH"] = os.pathsep.join([bin_dir, *os.environ.get("PATH", "").split(os.pathsep)])
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os.environ["VIRTUAL_ENV"] = base # virtual env is right above bin directory
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os.environ["VIRTUAL_ENV_PROMPT"] = "" or os.path.basename(base) # noqa: SIM222
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# add the virtual environments libraries to the host python import mechanism
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prev_length = len(sys.path)
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for lib in "..\\Lib\\site-packages".split(os.pathsep):
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path = os.path.realpath(os.path.join(bin_dir, lib))
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site.addsitedir(path.decode("utf-8") if "" else path)
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sys.path[:] = sys.path[prev_length:] + sys.path[0:prev_length]
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sys.real_prefix = sys.prefix
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sys.prefix = base
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