import { join } from 'node:path';
import { writeFile } from 'node:fs/promises';
export async function createEnvDefinitions({ distDir, env }) {
    const envKeysStr = Object.keys(env).map((key)=>`      ${key}: string`).join('\n');
    const definitionStr = `// Type definitions for Next.js environment variables
declare global {
  namespace NodeJS {
    interface ProcessEnv {
${envKeysStr}
    }
  }
}
export {}`;
    if (process.env.NODE_ENV === 'test') {
        return definitionStr;
    }
    try {
        // we expect the types directory to already exist
        const envDtsPath = join(distDir, 'types', 'env.d.ts');
        // do not await, this is not essential for further process
        writeFile(envDtsPath, definitionStr, 'utf-8');
    } catch (e) {
        console.error('Failed to write env.d.ts:', e);
    }
}

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