pythonVSCode/python_files/create_venv.py at main · chechi/pythonVSCode · GitHub

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# Licensed under the MIT License.

import argparse

import importlib.util as import_util

import json

import os

import pathlib

import subprocess

import sys

import urllib.request as url_lib

from typing import List, Optional, Sequence, Union

VENV_NAME = ".venv"

CWD = pathlib.Path.cwd()

MICROVENV_SCRIPT_PATH = pathlib.Path(__file__).parent / "create_microvenv.py"

class VenvError(Exception):

pass

def parse_args(argv: Sequence[str]) -> argparse.Namespace:

parser = argparse.ArgumentParser()

parser.add_argument(

"--requirements",

action="append",

default=[],

help="Install additional dependencies into the virtual environment.",

)

parser.add_argument(

"--toml",

action="store",

default=None,

help="Install additional dependencies from sources like `pyproject.toml` into the virtual environment.",

)

parser.add_argument(

"--extras",

action="append",

default=[],

help="Install specific package groups from `pyproject.toml` into the virtual environment.",

)

parser.add_argument(

"--git-ignore",

action="store_true",

default=False,

help="Add .gitignore to the newly created virtual environment.",

)

parser.add_argument(

"--name",

default=VENV_NAME,

type=str,

help="Name of the virtual environment.",

metavar="NAME",

action="store",

)

parser.add_argument(

"--stdin",

action="store_true",

default=False,

help="Read arguments from stdin.",

)

return parser.parse_args(argv)

def is_installed(module: str) -> bool:

return import_util.find_spec(module) is not None

def file_exists(path: Union[str, pathlib.PurePath]) -> bool:

return pathlib.Path(path).exists()

def venv_exists(name: str) -> bool:

return (

(CWD / name).exists()

and (CWD / name / "pyvenv.cfg").exists()

and file_exists(get_venv_path(name))

)

def run_process(args: Sequence[str], error_message: str) -> None:

try:

print("Running: " + " ".join(args))

subprocess.run(args, cwd=os.getcwd(), check=True)

except subprocess.CalledProcessError:

raise VenvError(error_message)

def get_venv_path(name: str) -> str:

# See `venv` doc here for more details on binary location:

# https://docs.python.org/3/library/venv.html#creating-virtual-environments

if sys.platform == "win32":

return os.fspath(CWD / name / "Scripts" / "python.exe")

else:

return os.fspath(CWD / name / "bin" / "python")

def install_requirements(venv_path: str, requirements: List[str]) -> None:

if not requirements:

return

for requirement in requirements:

print(f"VENV_INSTALLING_REQUIREMENTS: {requirement}")

run_process(

[venv_path, "-m", "pip", "install", "-r", requirement],

"CREATE_VENV.PIP_FAILED_INSTALL_REQUIREMENTS",

)

print("CREATE_VENV.PIP_INSTALLED_REQUIREMENTS")

def install_toml(venv_path: str, extras: List[str]) -> None:

args = "." if len(extras) == 0 else f".[{','.join(extras)}]"

run_process(

[venv_path, "-m", "pip", "install", "-e", args],

"CREATE_VENV.PIP_FAILED_INSTALL_PYPROJECT",

)

print("CREATE_VENV.PIP_INSTALLED_PYPROJECT")

def upgrade_pip(venv_path: str) -> None:

print("CREATE_VENV.UPGRADING_PIP")

run_process(

[venv_path, "-m", "pip", "install", "--upgrade", "pip"],

"CREATE_VENV.UPGRADE_PIP_FAILED",

)

print("CREATE_VENV.UPGRADED_PIP")

def add_gitignore(name: str) -> None:

git_ignore = CWD / name / ".gitignore"

if not file_exists(git_ignore):

print("Creating: " + os.fspath(git_ignore))

with open(git_ignore, "w") as f:

f.write("*")

def download_pip_pyz(name: str):

url = "https://bootstrap.pypa.io/pip/pip.pyz"

print("CREATE_VENV.DOWNLOADING_PIP")

try:

with url_lib.urlopen(url) as response:

pip_pyz_path = os.fspath(CWD / name / "pip.pyz")

with open(pip_pyz_path, "wb") as out_file:

data = response.read()

out_file.write(data)

out_file.flush()

except Exception:

raise VenvError("CREATE_VENV.DOWNLOAD_PIP_FAILED")

def install_pip(name: str):

pip_pyz_path = os.fspath(CWD / name / "pip.pyz")

executable = get_venv_path(name)

print("CREATE_VENV.INSTALLING_PIP")

run_process(

[executable, pip_pyz_path, "install", "pip"],

"CREATE_VENV.INSTALL_PIP_FAILED",

)

def get_requirements_from_args(args: argparse.Namespace) -> List[str]:

requirements = []

if args.stdin:

data = json.loads(sys.stdin.read())

requirements = data.get("requirements", [])

if args.requirements:

requirements.extend(args.requirements)

return requirements

def main(argv: Optional[Sequence[str]] = None) -> None:

if argv is None:

argv = []

args = parse_args(argv)

use_micro_venv = False

venv_installed = is_installed("venv")

pip_installed = is_installed("pip")

ensure_pip_installed = is_installed("ensurepip")

distutils_installed = is_installed("distutils")

if not venv_installed:

if sys.platform == "win32":

raise VenvError("CREATE_VENV.VENV_NOT_FOUND")

else:

use_micro_venv = True

if not distutils_installed:

print("Install `python3-distutils` package or equivalent for your OS.")

print("On Debian/Ubuntu: `sudo apt install python3-distutils`")

raise VenvError("CREATE_VENV.DISTUTILS_NOT_INSTALLED")

if venv_exists(args.name):

# A virtual environment with same name exists.

# We will use the existing virtual environment.

venv_path = get_venv_path(args.name)

print(f"EXISTING_VENV:{venv_path}")

else:

if use_micro_venv:

# `venv` was not found but on this platform we can use `microvenv`

run_process(

[

sys.executable,

os.fspath(MICROVENV_SCRIPT_PATH),

"--name",

args.name,

"CREATE_VENV.MICROVENV_FAILED_CREATION",

)

elif not pip_installed or not ensure_pip_installed:

# `venv` was found but `pip` or `ensurepip` was not found.

# We create a venv without `pip` in it. We will later install `pip`.

run_process(

[sys.executable, "-m", "venv", "--without-pip", args.name],

"CREATE_VENV.VENV_FAILED_CREATION",

)

else:

# Both `venv` and `pip` were found. So create a .venv normally

run_process(

[sys.executable, "-m", "venv", args.name],

"CREATE_VENV.VENV_FAILED_CREATION",

)

venv_path = get_venv_path(args.name)

print(f"CREATED_VENV:{venv_path}")

if args.git_ignore:

add_gitignore(args.name)

# At this point we have a .venv. Now we handle installing `pip`.

if pip_installed and ensure_pip_installed:

# We upgrade pip if it is already installed.

upgrade_pip(venv_path)

else:

# `pip` was not found, so we download it and install it.

download_pip_pyz(args.name)

install_pip(args.name)

requirements = get_requirements_from_args(args)

if requirements:

print(f"VENV_INSTALLING_REQUIREMENTS: {requirements}")

install_requirements(venv_path, requirements)

if args.toml:

print(f"VENV_INSTALLING_PYPROJECT: {args.toml}")

install_toml(venv_path, args.extras)

if __name__ == "__main__":

main(sys.argv[1:])

pythonVSCode/python_files/create_venv.py at main · chechi/pythonVSCode · GitHub

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