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"""Bootstrap"""
from __future__ import absolute_import, unicode_literals
import logging
import sys
from operator import eq, lt
from virtualenv.util.path import Path
from virtualenv.util.six import ensure_str
from virtualenv.util.subprocess import Popen, subprocess
from .bundle import from_bundle
from .periodic_update import add_wheel_to_update_log
from .util import Version, Wheel, discover_wheels
def get_wheel(distribution, version, for_py_version, search_dirs, download, app_data, do_periodic_update, env):
"""
Get a wheel with the given distribution-version-for_py_version trio, by using the extra search dir + download
"""
# not all wheels are compatible with all python versions, so we need to py version qualify it
wheel = None
if not download or version != Version.bundle:
# 1. acquire from bundle
wheel = from_bundle(distribution, version, for_py_version, search_dirs, app_data, do_periodic_update, env)
if download and wheel is None and version != Version.embed:
# 2. download from the internet
wheel = download_wheel(
distribution=distribution,
version_spec=Version.as_version_spec(version),
for_py_version=for_py_version,
search_dirs=search_dirs,
app_data=app_data,
to_folder=app_data.house,
env=env,
)
if wheel is not None and app_data.can_update:
add_wheel_to_update_log(wheel, for_py_version, app_data)
return wheel
def download_wheel(distribution, version_spec, for_py_version, search_dirs, app_data, to_folder, env):
to_download = "{}{}".format(distribution, version_spec or "")
logging.debug("download wheel %s %s to %s", to_download, for_py_version, to_folder)
cmd = [
sys.executable,
"-m",
"pip",
"download",
"--progress-bar",
"off",
"--disable-pip-version-check",
"--only-binary=:all:",
"--no-deps",
"--python-version",
for_py_version,
"-d",
str(to_folder),
to_download,
]
# pip has no interface in python - must be a new sub-process
env = pip_wheel_env_run(search_dirs, app_data, env)
process = Popen(cmd, env=env, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
out, err = process.communicate()
if process.returncode != 0:
kwargs = {"output": out}
if sys.version_info < (3, 5):
kwargs["output"] += err
else:
kwargs["stderr"] = err
raise subprocess.CalledProcessError(process.returncode, cmd, **kwargs)
result = _find_downloaded_wheel(distribution, version_spec, for_py_version, to_folder, out)
logging.debug("downloaded wheel %s", result.name)
return result
def _find_downloaded_wheel(distribution, version_spec, for_py_version, to_folder, out):
for line in out.splitlines():
line = line.lstrip()
for marker in ("Saved ", "File was already downloaded "):
if line.startswith(marker):
return Wheel(Path(line[len(marker) :]).absolute())
# if for some reason the output does not match fallback to latest version with that spec
return find_compatible_in_house(distribution, version_spec, for_py_version, to_folder)
def find_compatible_in_house(distribution, version_spec, for_py_version, in_folder):
wheels = discover_wheels(in_folder, distribution, None, for_py_version)
start, end = 0, len(wheels)
if version_spec is not None:
if version_spec.startswith("<"):
from_pos, op = 1, lt
elif version_spec.startswith("=="):
from_pos, op = 2, eq
else:
raise ValueError(version_spec)
version = Wheel.as_version_tuple(version_spec[from_pos:])
start = next((at for at, w in enumerate(wheels) if op(w.version_tuple, version)), len(wheels))
return None if start == end else wheels[start]
def pip_wheel_env_run(search_dirs, app_data, env):
for_py_version = "{}.{}".format(*sys.version_info[0:2])
env = env.copy()
env.update(
{
ensure_str(k): str(v) # python 2 requires these to be string only (non-unicode)
for k, v in {"PIP_USE_WHEEL": "1", "PIP_USER": "0", "PIP_NO_INPUT": "1"}.items()
},
)
wheel = get_wheel(
distribution="pip",
version=None,
for_py_version=for_py_version,
search_dirs=search_dirs,
download=False,
app_data=app_data,
do_periodic_update=False,
env=env,
)
if wheel is None:
raise RuntimeError("could not find the embedded pip")
env[str("PYTHONPATH")] = str(wheel.path)
return env
........