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efa270fa44
Only building for desktop platforms for now, as Android, iOS and Web builds would all be obsolete and unable to run on current devices.
121 lines
3.9 KiB
Python
121 lines
3.9 KiB
Python
"""SCons.Platform.virtualenv
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Support for virtualenv.
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"""
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#
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# Copyright (c) 2001 - 2019 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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__revision__ = "src/engine/SCons/Platform/virtualenv.py bee7caf9defd6e108fc2998a2520ddb36a967691 2019-12-17 02:07:09 bdeegan"
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import os
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import sys
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import SCons.Util
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virtualenv_enabled_by_default = False
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def _enable_virtualenv_default():
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return SCons.Util.get_os_env_bool('SCONS_ENABLE_VIRTUALENV', virtualenv_enabled_by_default)
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def _ignore_virtualenv_default():
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return SCons.Util.get_os_env_bool('SCONS_IGNORE_VIRTUALENV', False)
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enable_virtualenv = _enable_virtualenv_default()
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ignore_virtualenv = _ignore_virtualenv_default()
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virtualenv_variables = ['VIRTUAL_ENV', 'PIPENV_ACTIVE']
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def _running_in_virtualenv():
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"""Returns True, if scons is executed within a virtualenv"""
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# see https://stackoverflow.com/a/42580137
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return (hasattr(sys, 'real_prefix') or
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(hasattr(sys, 'base_prefix') and sys.base_prefix != sys.prefix))
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def _is_path_in(path, base):
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"""Returns true, if **path** is located under the **base** directory."""
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if not path or not base: # empty path may happen, base too
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return False
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rp = os.path.relpath(path, base)
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return ((not rp.startswith(os.path.pardir)) and (not rp == os.path.curdir))
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def _inject_venv_variables(env):
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if 'ENV' not in env:
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env['ENV'] = {}
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ENV = env['ENV']
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for name in virtualenv_variables:
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try:
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ENV[name] = os.environ[name]
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except KeyError:
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pass
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def _inject_venv_path(env, path_list=None):
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"""Modify environment such that SCons will take into account its virtualenv
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when running external tools."""
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if path_list is None:
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path_list = os.getenv('PATH')
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env.PrependENVPath('PATH', select_paths_in_venv(path_list))
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def select_paths_in_venv(path_list):
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"""Returns a list of paths from **path_list** which are under virtualenv's
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home directory."""
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if SCons.Util.is_String(path_list):
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path_list = path_list.split(os.path.pathsep)
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# Find in path_list the paths under the virtualenv's home
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return [path for path in path_list if IsInVirtualenv(path)]
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def ImportVirtualenv(env):
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"""Copies virtualenv-related environment variables from OS environment
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to ``env['ENV']`` and prepends virtualenv's PATH to ``env['ENV']['PATH']``.
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"""
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_inject_venv_variables(env)
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_inject_venv_path(env)
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def Virtualenv():
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"""Returns path to the virtualenv home if scons is executing within a
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virtualenv or None, if not."""
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if _running_in_virtualenv():
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return sys.prefix
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return None
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def IsInVirtualenv(path):
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"""Returns True, if **path** is under virtualenv's home directory. If not,
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or if we don't use virtualenv, returns False."""
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return _is_path_in(path, Virtualenv())
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# Local Variables:
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# tab-width:4
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# indent-tabs-mode:nil
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# End:
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# vim: set expandtab tabstop=4 shiftwidth=4:
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