iframe-proxy | Sunbelt Computer Software

History

152 lines (119 loc) · 4.7 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

from __future__ import unicode_literals

import contextlib

import os

import sys

from pre_commit.envcontext import envcontext

from pre_commit.envcontext import UNSET

from pre_commit.envcontext import Var

from pre_commit.languages import helpers

from pre_commit.parse_shebang import find_executable

from pre_commit.util import CalledProcessError

from pre_commit.util import clean_path_on_failure

from pre_commit.util import cmd_output

from pre_commit.xargs import xargs

ENVIRONMENT_DIR = 'py_env'

def bin_dir(venv):

"""On windows there's a different directory for the virtualenv"""

bin_part = 'Scripts' if os.name == 'nt' else 'bin'

return os.path.join(venv, bin_part)

def get_env_patch(venv):

return (

('PYTHONHOME', UNSET),

('VIRTUAL_ENV', venv),

('PATH', (bin_dir(venv), os.pathsep, Var('PATH'))),

)

@contextlib.contextmanager

def in_env(prefix, language_version):

envdir = prefix.path(

helpers.environment_dir(ENVIRONMENT_DIR, language_version),

)

with envcontext(get_env_patch(envdir)):

yield

def _find_by_py_launcher(version): # pragma: no cover (windows only)

if version.startswith('python'):

try:

return cmd_output(

'py', '-{}'.format(version[len('python'):]),

'-c', 'import sys; print(sys.executable)',

)[1].strip()

except CalledProcessError:

pass

def _get_default_version(): # pragma: no cover (platform dependent)

def _norm(path):

_, exe = os.path.split(path.lower())

exe, _, _ = exe.partition('.exe')

if find_executable(exe) and exe not in {'python', 'pythonw'}:

return exe

# First attempt from `sys.executable` (or the realpath)

# On linux, I see these common sys.executables:

# system `python`: /usr/bin/python -> python2.7

# system `python2`: /usr/bin/python2 -> python2.7

# virtualenv v: v/bin/python (will not return from this loop)

# virtualenv v -ppython2: v/bin/python -> python2

# virtualenv v -ppython2.7: v/bin/python -> python2.7

# virtualenv v -ppypy: v/bin/python -> v/bin/pypy

for path in {sys.executable, os.path.realpath(sys.executable)}:

exe = _norm(path)

if exe:

return exe

# Next try the `pythonX.X` executable

exe = 'python{}.{}'.format(*sys.version_info)

if find_executable(exe):

return exe

if _find_by_py_launcher(exe):

return exe

# Give a best-effort try for windows

if os.path.exists(r'C:\{}\python.exe'.format(exe.replace('.', ''))):

return exe

# We tried!

return 'default'

def get_default_version():

# TODO: when dropping python2, use `functools.lru_cache(maxsize=1)`

try:

return get_default_version.cached_version

except AttributeError:

get_default_version.cached_version = _get_default_version()

return get_default_version()

def healthy(prefix, language_version):

with in_env(prefix, language_version):

retcode, _, _ = cmd_output(

'python', '-c', 'import ctypes, datetime, io, os, ssl, weakref',

retcode=None,

)

return retcode == 0

def norm_version(version):

if os.name == 'nt': # pragma: no cover (windows)

# Try looking up by name

version_exec = find_executable(version)

if version_exec and version_exec != version:

return version_exec

version_exec = _find_by_py_launcher(version)

if version_exec:

return version_exec

# If it is in the form pythonx.x search in the default

# place on windows

if version.startswith('python'):

return r'C:\{}\python.exe'.format(version.replace('.', ''))

# Otherwise assume it is a path

return os.path.expanduser(version)

def install_environment(prefix, version, additional_dependencies):

additional_dependencies = tuple(additional_dependencies)

directory = helpers.environment_dir(ENVIRONMENT_DIR, version)

# Install a virtualenv

env_dir = prefix.path(directory)

with clean_path_on_failure(env_dir):

venv_cmd = [sys.executable, '-m', 'virtualenv', env_dir]

if version != 'default':

venv_cmd.extend(['-p', norm_version(version)])

else:

venv_cmd.extend(['-p', os.path.realpath(sys.executable)])

venv_env = dict(os.environ, VIRTUALENV_NO_DOWNLOAD='1')

cmd_output(*venv_cmd, cwd='/', env=venv_env)

with in_env(prefix, version):

helpers.run_setup_cmd(

prefix, ('pip', 'install', '.') + additional_dependencies,

)

def run_hook(prefix, hook, file_args):

with in_env(prefix, hook['language_version']):

return xargs(helpers.to_cmd(hook), file_args)

Sunbelt Computer Software

PL/B Language Development and Support

Navigation Menu

Sunbelt Computer Software

PL/B Language Development and Support

FilesExpand file tree

python.py

Latest commit

History

python.py

File metadata and controls