37 lines
1.2 KiB
Python
37 lines
1.2 KiB
Python
# -*- coding: utf-8 -*-
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"""Activate venv for current interpreter:
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Use `from vtk.web import venv` along one of the following
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- `--venv /path/to/venv/base` argument
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- environment variable `VTK_VENV=/path/to/venv/base`
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This can be used when you must use an existing Python interpreter, not the venv 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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VENV_BASE = None
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VENV_LOADED = False
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if "--venv" in sys.argv:
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VENV_BASE = os.path.abspath(sys.argv[sys.argv.index("--venv") + 1])
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if os.environ.get("VTK_VENV"):
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VENV_BASE = os.path.abspath(os.environ.get("VTK_VENV"))
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if not VENV_LOADED and VENV_BASE and os.path.exists(VENV_BASE):
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VENV_LOADED = True
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# Code inspired by virutal-env::bin/active_this.py
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bin_dir = os.path.join(VENV_BASE, "bin")
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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"] = VENV_BASE
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prev_length = len(sys.path)
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python_libs = os.path.join(VENV_BASE, f"lib/python{sys.version_info.major}.{sys.version_info.minor}/site-packages")
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site.addsitedir(python_libs)
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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 = VENV_BASE
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#
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print(f"VTK is using venv: {VENV_BASE}")
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