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