1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
"""Build Environment used for isolation during sdist building
"""
import os
from sysconfig import get_paths
from pip._internal.utils.temp_dir import TempDirectory
class BuildEnvironment(object):
"""Creates and manages an isolated environment to install build deps
"""
def __init__(self, no_clean):
self._temp_dir = TempDirectory(kind="build-env")
self._no_clean = no_clean
@property
def path(self):
return self._temp_dir.path
def __enter__(self):
self._temp_dir.create()
self.save_path = os.environ.get('PATH', None)
self.save_pythonpath = os.environ.get('PYTHONPATH', None)
install_scheme = 'nt' if (os.name == 'nt') else 'posix_prefix'
install_dirs = get_paths(install_scheme, vars={
'base': self.path,
'platbase': self.path,
})
scripts = install_dirs['scripts']
if self.save_path:
os.environ['PATH'] = scripts + os.pathsep + self.save_path
else:
os.environ['PATH'] = scripts + os.pathsep + os.defpath
if install_dirs['purelib'] == install_dirs['platlib']:
lib_dirs = install_dirs['purelib']
else:
lib_dirs = install_dirs['purelib'] + os.pathsep + \
install_dirs['platlib']
if self.save_pythonpath:
os.environ['PYTHONPATH'] = lib_dirs + os.pathsep + \
self.save_pythonpath
else:
os.environ['PYTHONPATH'] = lib_dirs
return self.path
def __exit__(self, exc_type, exc_val, exc_tb):
if not self._no_clean:
self._temp_dir.cleanup()
if self.save_path is None:
os.environ.pop('PATH', None)
else:
os.environ['PATH'] = self.save_path
if self.save_pythonpath is None:
os.environ.pop('PYTHONPATH', None)
else:
os.environ['PYTHONPATH'] = self.save_pythonpath
def cleanup(self):
self._temp_dir.cleanup()
class NoOpBuildEnvironment(BuildEnvironment):
"""A no-op drop-in replacement for BuildEnvironment
"""
def __init__(self, no_clean):
pass
def __enter__(self):
pass
def __exit__(self, exc_type, exc_val, exc_tb):
pass
def cleanup(self):
pass
|
