iframe-proxy | Sunbelt Computer Software

History

226 lines (181 loc) · 6.92 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

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

from __future__ import annotations

import contextlib

import functools

import os

import sys

from typing import Generator

from typing import Sequence

import pre_commit.constants as C

from pre_commit.envcontext import envcontext

from pre_commit.envcontext import PatchesT

from pre_commit.envcontext import UNSET

from pre_commit.envcontext import Var

from pre_commit.hook import Hook

from pre_commit.languages import helpers

from pre_commit.parse_shebang import find_executable

from pre_commit.prefix import Prefix

from pre_commit.util import CalledProcessError

from pre_commit.util import cmd_output

from pre_commit.util import cmd_output_b

from pre_commit.util import win_exe

ENVIRONMENT_DIR = 'py_env'

@functools.lru_cache(maxsize=None)

def _version_info(exe: str) -> str:

prog = 'import sys;print(".".join(str(p) for p in sys.version_info))'

try:

return cmd_output(exe, '-S', '-c', prog)[1].strip()

except CalledProcessError:

return f'<<error retrieving version from {exe}>>'

def _read_pyvenv_cfg(filename: str) -> dict[str, str]:

ret = {}

with open(filename, encoding='UTF-8') as f:

for line in f:

try:

k, v = line.split('=')

except ValueError: # blank line / comment / etc.

continue

else:

ret[k.strip()] = v.strip()

return ret

def bin_dir(venv: str) -> str:

"""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: str) -> PatchesT:

return (

('PIP_DISABLE_PIP_VERSION_CHECK', '1'),

('PYTHONHOME', UNSET),

('VIRTUAL_ENV', venv),

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

)

def _find_by_py_launcher(

version: str,

) -> str | None: # pragma: no cover (windows only)

if version.startswith('python'):

num = version[len('python'):]

cmd = ('py', f'-{num}', '-c', 'import sys; print(sys.executable)')

env = dict(os.environ, PYTHONIOENCODING='UTF-8')

try:

return cmd_output(*cmd, env=env)[1].strip()

except CalledProcessError:

pass

return None

def _find_by_sys_executable() -> str | None:

def _norm(path: str) -> str | None:

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

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

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

return exe

return None

# 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

return None

@functools.lru_cache(maxsize=1)

def get_default_version() -> str: # pragma: no cover (platform dependent)

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

exe = _find_by_sys_executable()

if exe:

return exe

# Next try the `pythonX.X` executable

exe = f'python{sys.version_info[0]}.{sys.version_info[1]}'

if find_executable(exe):

return exe

if _find_by_py_launcher(exe):

return exe

# We tried!

return C.DEFAULT

def _sys_executable_matches(version: str) -> bool:

if version == 'python':

return True

elif not version.startswith('python'):

return False

try:

info = tuple(int(p) for p in version[len('python'):].split('.'))

except ValueError:

return False

return sys.version_info[:len(info)] == info

def norm_version(version: str) -> str | None:

if version == C.DEFAULT: # use virtualenv's default

return None

elif _sys_executable_matches(version): # virtualenv defaults to our exe

return None

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

version_exec = _find_by_py_launcher(version)

if version_exec:

return version_exec

# Try looking up by name

version_exec = find_executable(version)

if version_exec and version_exec != version:

return version_exec

# Otherwise assume it is a path

return os.path.expanduser(version)

@contextlib.contextmanager

def in_env(

prefix: Prefix,

language_version: str,

) -> Generator[None, None, None]:

envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, language_version)

with envcontext(get_env_patch(envdir)):

yield

def health_check(prefix: Prefix, language_version: str) -> str | None:

envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, language_version)

pyvenv_cfg = os.path.join(envdir, 'pyvenv.cfg')

# created with "old" virtualenv

if not os.path.exists(pyvenv_cfg):

return 'pyvenv.cfg does not exist (old virtualenv?)'

exe_name = win_exe('python')

py_exe = prefix.path(bin_dir(envdir), exe_name)

cfg = _read_pyvenv_cfg(pyvenv_cfg)

if 'version_info' not in cfg:

return "created virtualenv's pyvenv.cfg is missing `version_info`"

# always use uncached lookup here in case we replaced an unhealthy env

virtualenv_version = _version_info.__wrapped__(py_exe)

if virtualenv_version != cfg['version_info']:

return (

f'virtualenv python version did not match created version:\n'

f'- actual version: {virtualenv_version}\n'

f'- expected version: {cfg["version_info"]}\n'

)

# made with an older version of virtualenv? skip `base-executable` check

if 'base-executable' not in cfg:

return None

base_exe_version = _version_info(cfg['base-executable'])

if base_exe_version != cfg['version_info']:

return (

f'base executable python version does not match created version:\n'

f'- base-executable version: {base_exe_version}\n'

f'- expected version: {cfg["version_info"]}\n'

)

else:

return None

def install_environment(

prefix: Prefix,

version: str,

additional_dependencies: Sequence[str],

) -> None:

envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)

venv_cmd = [sys.executable, '-mvirtualenv', envdir]

python = norm_version(version)

if python is not None:

venv_cmd.extend(('-p', python))

install_cmd = ('python', '-mpip', 'install', '.', *additional_dependencies)

cmd_output_b(*venv_cmd, cwd='/')

with in_env(prefix, version):

helpers.run_setup_cmd(prefix, install_cmd)

def run_hook(

hook: Hook,

file_args: Sequence[str],

color: bool,

) -> tuple[int, bytes]:

with in_env(hook.prefix, hook.language_version):

return helpers.run_xargs(hook, hook.cmd, file_args, color=color)

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