install_lib.py
3.75 KB
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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
import os
import imp
from itertools import product, starmap
import distutils.command.install_lib as orig
class install_lib(orig.install_lib):
"""Don't add compiled flags to filenames of non-Python files"""
def run(self):
self.build()
outfiles = self.install()
if outfiles is not None:
# always compile, in case we have any extension stubs to deal with
self.byte_compile(outfiles)
def get_exclusions(self):
"""
Return a collections.Sized collections.Container of paths to be
excluded for single_version_externally_managed installations.
"""
all_packages = (
pkg
for ns_pkg in self._get_SVEM_NSPs()
for pkg in self._all_packages(ns_pkg)
)
excl_specs = product(all_packages, self._gen_exclusion_paths())
return set(starmap(self._exclude_pkg_path, excl_specs))
def _exclude_pkg_path(self, pkg, exclusion_path):
"""
Given a package name and exclusion path within that package,
compute the full exclusion path.
"""
parts = pkg.split('.') + [exclusion_path]
return os.path.join(self.install_dir, *parts)
@staticmethod
def _all_packages(pkg_name):
"""
>>> list(install_lib._all_packages('foo.bar.baz'))
['foo.bar.baz', 'foo.bar', 'foo']
"""
while pkg_name:
yield pkg_name
pkg_name, sep, child = pkg_name.rpartition('.')
def _get_SVEM_NSPs(self):
"""
Get namespace packages (list) but only for
single_version_externally_managed installations and empty otherwise.
"""
# TODO: is it necessary to short-circuit here? i.e. what's the cost
# if get_finalized_command is called even when namespace_packages is
# False?
if not self.distribution.namespace_packages:
return []
install_cmd = self.get_finalized_command('install')
svem = install_cmd.single_version_externally_managed
return self.distribution.namespace_packages if svem else []
@staticmethod
def _gen_exclusion_paths():
"""
Generate file paths to be excluded for namespace packages (bytecode
cache files).
"""
# always exclude the package module itself
yield '__init__.py'
yield '__init__.pyc'
yield '__init__.pyo'
if not hasattr(imp, 'get_tag'):
return
base = os.path.join('__pycache__', '__init__.' + imp.get_tag())
yield base + '.pyc'
yield base + '.pyo'
yield base + '.opt-1.pyc'
yield base + '.opt-2.pyc'
def copy_tree(
self, infile, outfile,
preserve_mode=1, preserve_times=1, preserve_symlinks=0, level=1
):
assert preserve_mode and preserve_times and not preserve_symlinks
exclude = self.get_exclusions()
if not exclude:
return orig.install_lib.copy_tree(self, infile, outfile)
# Exclude namespace package __init__.py* files from the output
from setuptools.archive_util import unpack_directory
from distutils import log
outfiles = []
def pf(src, dst):
if dst in exclude:
log.warn("Skipping installation of %s (namespace package)",
dst)
return False
log.info("copying %s -> %s", src, os.path.dirname(dst))
outfiles.append(dst)
return dst
unpack_directory(infile, outfile, pf)
return outfiles
def get_outputs(self):
outputs = orig.install_lib.get_outputs(self)
exclude = self.get_exclusions()
if exclude:
return [f for f in outputs if f not in exclude]
return outputs