#!/usr/bin/env node
/**
* Cross-platform script to setup Python virtual environment
*
* This script handles the "Access is denied" error on Windows
* which occurs when VSCode Python extension or other processes lock files
*
* Strategy:
* 1. Try to remove existing .venv
* 2. If removal fails (file locked), check if venv is still usable
* 3. Create new venv only if needed
*/
import { execSync } from 'node:child_process'
import { existsSync, rmSync } from 'node:fs'
import { join } from 'node:path'
const venvPath = join(process.cwd(), '.venv')
/**
* Check if the existing venv is usable
*/
function isVenvUsable() {
const pythonPath =
process.platform === 'win32' ? join(venvPath, 'Scripts', 'python.exe') : join(venvPath, 'bin', 'python')
if (!existsSync(pythonPath)) {
return false
}
try {
execSync(`"${pythonPath}" --version`, { stdio: 'pipe' })
return true
} catch {
return false
}
}
/**
* Try to remove the venv directory
*/
function tryRemoveVenv() {
if (!existsSync(venvPath)) {
return true // Nothing to remove
}
console.log('Attempting to remove existing .venv directory...')
try {
rmSync(venvPath, {
recursive: true,
force: true,
maxRetries: 3,
retryDelay: 1000
})
console.log('Successfully removed .venv')
return true
} catch (error) {
console.warn(`Could not fully remove .venv: ${error.message}`)
return false
}
}
/**
* Create a new venv using uv
*/
function createVenv() {
console.log('Creating new virtual environment...')
try {
execSync('uv venv', { stdio: 'inherit' })
console.log('Virtual environment created successfully')
return true
} catch (error) {
console.error(`Failed to create venv: ${error.message}`)
return false
}
}
// Main logic
const wasRemoved = tryRemoveVenv()
if (wasRemoved) {
// .venv was removed or didn't exist, create fresh
if (!createVenv()) {
process.exit(1)
}
} else {
// Couldn't remove .venv, check if it's still usable
if (isVenvUsable()) {
console.log('Existing .venv is still usable, skipping recreation.')
console.log('Note: Some files may be locked by VSCode or other processes.')
console.log("If you experience issues, close VSCode and run 'mise run setup' again.")
} else {
console.warn('Warning: .venv exists but is not usable, and we cannot remove it.')
console.warn("Skipping venv setup. Please close VSCode and run 'mise run setup' again if needed.")
// Don't fail the entire setup, just warn and continue
}
}
