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#!/usr/bin/env python3
"""
Script to switch Python versions for development.
"""
import argparse
import os
import shutil
import subprocess
import sys
from pathlib import Path
def get_python_path(version):
"""Get path to Python executable from pyenv."""
try:
return (
subprocess.check_output(["pyenv", "which", f"python{version}"])
.decode()
.strip()
)
except subprocess.CalledProcessError as e:
print(f"Error finding Python {version} with pyenv: {e}", file=sys.stderr)
sys.exit(1)
def main():
"""Main function to switch Python versions."""
parser = argparse.ArgumentParser(
description="Switch Python version for development."
)
parser.add_argument(
"python_version", nargs="?", help="Python version to switch to (e.g., 3.12)"
)
args = parser.parse_args()
python_version_file = Path(".python-version")
current_version = None
if python_version_file.exists():
with open(python_version_file) as f:
current_version = f.read().strip()
python_version = args.python_version or current_version
if not python_version:
print(
"Error: No Python version specified and .python-version not found.",
file=sys.stderr,
)
sys.exit(1)
print(f"Switching to Python {python_version}")
need_switch = current_version != python_version if current_version else True
if need_switch:
print(
"\n[VS Code WARNING] If you are using Visual Studio Code:\n"
" - Please update the default Python interpreter (Ctrl+Shift+P → 'Python: Select Interpreter') to match the new version.\n"
" - Also open a new terminal after switching Python versions.\n"
)
subprocess.run(["pyenv", "local", python_version], check=True)
venv_path = Path(".venv")
if venv_path.exists():
print("Removing existing virtual environment...")
shutil.rmtree(venv_path)
python_path = get_python_path(python_version)
subprocess.run(["uv", "venv", f"--python={python_path}"], check=True)
print("Installing dependencies...")
subprocess.run(["uv", "pip", "install", "-e", ".[dev]"], check=True)
else:
print(f"Already using Python {python_version}")
subprocess.run(["uv", "sync", "--extra", "dev"], check=True)
print(f"Successfully switched to Python {python_version}")
print("To activate this environment manually, run:")
print(" source .venv/bin/activate # On macOS/Linux")
print(" .venv\\Scripts\\activate # On Windows")
if __name__ == "__main__":
main()
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