Pull aws secrets values given keys.

AWSSecretsByKeys.ts

import AWS = require('aws-sdk');
import minimist = require('minimist');
const args: any = minimist(process.argv);

const secretsManager = new AWS.SecretsManager({
  region: process.env.AWS_DEFAULT_REGION || 'us-east-2',
});

export class SecretByKey {
  public getSecretByKey(secretId: string, keys: string[]): Promise<any> {
    const params: any = {
      SecretId: secretId,
    };
    return new Promise((resolve: any, reject: any) => {
      secretsManager.getSecretValue(params, (err: any, data: any) => {
        if (err) {
          reject(err);
        }
        const valueSecret: any = JSON.parse(data.SecretString);
        // tslint:disable-next-line: prefer-const
        let result: any = {};
        for (const key of keys) {
          result[key] = valueSecret[key];
        }
        resolve(result);
      });
    });
  }

  public async getSecret() {
    let keys: string[] = [];
    try {
      keys = JSON.parse(args.keys);
    } catch (error) {
      // tslint:disable-next-line: no-console
      console.error(null);
      process.exit(1);
    }
    const value: any = await this.getSecretByKey(args.secretId, keys);
    // tslint:disable-next-line: no-console
    console.log(JSON.stringify(value));
  }
}

const secret: SecretByKey = new SecretByKey();
secret
  .getSecret()
  .then()
  .catch((err: any) => {
    // tslint:disable-next-line: no-console
    console.error(null);
    process.exit(1);
  });