Podría usar un valor booleano para recordar si el código se ejecutó o no. Algo como esto:

 let excecuted = false; if (!excecuted) { excecuted = true; getSecrets("key").then((keys: any) => { const originalKeys = JSON.parse(keys); for (const key in originalKeys) { if (originalKeys.hasOwnProperty(key)) { appendFileSync(__dirname + "/.env", `${key}='${originalKeys[key]}'\n`); } } }); }

Estoy guardando mi contenido .env dinámicamente desde el administrador de secretos de AWS.

¿Por qué quieres guardarlos en .env ? Puede guardarlos en el objeto de configuración y puede reutilizarlos donde los necesite.

 const AWS = require('aws-sdk'); class SecretsManager { let #config = null; async #getSecret (secretName, region){ const config = { region : region } var secret, decodedBinarySecret; let secretsManager = new AWS.SecretsManager(config); try { let secretValue = await secretsManager.getSecretValue({SecretId: secretName}).promise(); if ('SecretString' in secretValue) { return secret = secretValue.SecretString; } else { let buff = new Buffer(secretValue.SecretBinary, 'base64'); return decodedBinarySecret = buff.toString('ascii'); } } catch (err) { if (err.code === 'DecryptionFailureException') // Secrets Manager can't decrypt the protected secret text using the provided KMS key. // Deal with the exception here, and/or rethrow at your discretion. throw err; else if (err.code === 'InternalServiceErrorException') // An error occurred on the server side. // Deal with the exception here, and/or rethrow at your discretion. throw err; else if (err.code === 'InvalidParameterException') // You provided an invalid value for a parameter. // Deal with the exception here, and/or rethrow at your discretion. throw err; else if (err.code === 'InvalidRequestException') // You provided a parameter value that is not valid for the current state of the resource. // Deal with the exception here, and/or rethrow at your discretion. throw err; else if (err.code === 'ResourceNotFoundException') // We can't find the resource that you asked for. // Deal with the exception here, and/or rethrow at your discretion. throw err; } } static async getSecretValues() { const secretName = '<secretsName>'; const region = '<Region>'; try { if (!this.#config) { return this.#config; } else { this.#config = await this.#getSecret(secretName, region); } } catch (e) { console.log(e); } } } module.exports = SecretsManager;

En tus archivos puedes usar esto:

 const SecretsManager = require('./SecretsManager.js'); const secret = SecretsManager.getSecretValues();

Puedes consultar aquí para más detalles.