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create_conda.py
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130 lines (106 loc) · 3.34 KB
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# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.
import argparse
import os
import pathlib
import subprocess
import sys
from typing import Optional, Sequence, Union
CONDA_ENV_NAME = ".conda"
CWD = pathlib.Path.cwd()
class VenvError(Exception):
pass
def parse_args(argv: Sequence[str]) -> argparse.Namespace:
parser = argparse.ArgumentParser()
parser.add_argument(
"--python",
action="store",
help="Python version to install in the virtual environment.",
default=f"{sys.version_info.major}.{sys.version_info.minor}",
)
parser.add_argument(
"--install",
action="store_true",
default=False,
help="Install packages 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=CONDA_ENV_NAME,
type=str,
help="Name of the virtual environment.",
metavar="NAME",
action="store",
)
return parser.parse_args(argv)
def file_exists(path: Union[str, pathlib.PurePath]) -> bool:
return os.path.exists(path) # noqa: PTH110
def conda_env_exists(name: Union[str, pathlib.PurePath]) -> bool:
return os.path.exists(CWD / name) # noqa: PTH110
def run_process(args: Sequence[str], error_message: str) -> None:
try:
print("Running: " + " ".join(args))
subprocess.run(args, cwd=os.getcwd(), check=True) # noqa: PTH109
except subprocess.CalledProcessError as exc:
raise VenvError(error_message) from exc
def get_conda_env_path(name: str) -> str:
return os.fspath(CWD / name)
def install_packages(env_path: str) -> None:
yml = os.fspath(CWD / "environment.yml")
if file_exists(yml):
print(f"CONDA_INSTALLING_YML: {yml}")
run_process(
[
sys.executable,
"-m",
"conda",
"env",
"update",
"--prefix",
env_path,
"--file",
yml,
],
"CREATE_CONDA.FAILED_INSTALL_YML",
)
print("CREATE_CONDA.INSTALLED_YML")
def add_gitignore(name: str) -> None:
git_ignore = CWD / name / ".gitignore"
if not git_ignore.is_file():
print(f"Creating: {os.fsdecode(git_ignore)}")
git_ignore.write_text("*")
def main(argv: Optional[Sequence[str]] = None) -> None:
if argv is None:
argv = []
args = parse_args(argv)
if conda_env_exists(args.name):
env_path = get_conda_env_path(args.name)
print(f"EXISTING_CONDA_ENV:{env_path}")
else:
run_process(
[
sys.executable,
"-m",
"conda",
"create",
"--yes",
"--prefix",
args.name,
f"python={args.python}",
],
"CREATE_CONDA.ENV_FAILED_CREATION",
)
env_path = get_conda_env_path(args.name)
print(f"CREATED_CONDA_ENV:{env_path}")
if args.git_ignore:
add_gitignore(args.name)
if args.install:
install_packages(env_path)
if __name__ == "__main__":
main(sys.argv[1:])