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33 lines
1.2 KiB
Python
33 lines
1.2 KiB
Python
5 years ago
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# -*- coding: utf-8 -*-
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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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"""
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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:
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raise AssertionError("You must use exec(open(this_file).read(), {'__file__': this_file}))")
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bin_dir = os.path.dirname(abs_file)
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base = bin_dir[: -len("__BIN_NAME__") - 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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# 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_FOLDERS__".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 "__DECODE_PATH__" 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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