Viewing file:  venv.py (2.89 KB) -rw-r--r--
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from __future__ import absolute_import, unicode_literals
import logging
from copy import copy
from virtualenv.create.via_global_ref.store import handle_store_python
from virtualenv.discovery.py_info import PythonInfo
from virtualenv.util.error import ProcessCallFailed
from virtualenv.util.path import ensure_dir
from virtualenv.util.subprocess import run_cmd
from .api import ViaGlobalRefApi, ViaGlobalRefMeta
class Venv(ViaGlobalRefApi):
def __init__(self, options, interpreter):
self.describe = options.describe
super(Venv, self).__init__(options, interpreter)
self.can_be_inline = (
interpreter is PythonInfo.current() and interpreter.executable == interpreter.system_executable
)
self._context = None
def _args(self):
return super(Venv, self)._args() + ([("describe", self.describe.__class__.__name__)] if self.describe else [])
@classmethod
def can_create(cls, interpreter):
if interpreter.has_venv:
meta = ViaGlobalRefMeta()
if interpreter.platform == "win32" and interpreter.version_info.major == 3:
meta = handle_store_python(meta, interpreter)
return meta
return None
def create(self):
if self.can_be_inline:
self.create_inline()
else:
self.create_via_sub_process()
for lib in self.libs:
ensure_dir(lib)
super(Venv, self).create()
def create_inline(self):
from venv import EnvBuilder
builder = EnvBuilder(
system_site_packages=self.enable_system_site_package,
clear=False,
symlinks=self.symlinks,
with_pip=False,
)
builder.create(str(self.dest))
def create_via_sub_process(self):
cmd = self.get_host_create_cmd()
logging.info("using host built-in venv to create via %s", " ".join(cmd))
code, out, err = run_cmd(cmd)
if code != 0:
raise ProcessCallFailed(code, out, err, cmd)
def get_host_create_cmd(self):
cmd = [self.interpreter.system_executable, "-m", "venv", "--without-pip"]
if self.enable_system_site_package:
cmd.append("--system-site-packages")
cmd.append("--symlinks" if self.symlinks else "--copies")
cmd.append(str(self.dest))
return cmd
def set_pyenv_cfg(self):
# prefer venv options over ours, but keep our extra
venv_content = copy(self.pyenv_cfg.refresh())
super(Venv, self).set_pyenv_cfg()
self.pyenv_cfg.update(venv_content)
def __getattribute__(self, item):
describe = object.__getattribute__(self, "describe")
if describe is not None and hasattr(describe, item):
element = getattr(describe, item)
if not callable(element) or item in ("script",):
return element
return object.__getattribute__(self, item)
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