inquirer-s3

An S3 object selector for inquirer.

Current version: 1.0.0

Lead Maintainer: Halim Qarroum

Table of content

• Installation
• Description
• Handling errors
• Provisionning AWS credentials
• Examples
• See also

Install

To add the inquirer-s3 prompt to your application dependencies, run the following command :

npm install --save inquirer-s3

Description

The inquirer-s3 prompt allows you to use inquirer to select an S3 object located on an AWS account. This prompt allows you to list buckets, objects within selected buckets and navigate across your buckets.

Usage

Register the prompt

In order to use inquirer-s3, you first need to register it with inquirer under a key name as follow.

const inquirer = require('inquirer');
// Registers `inquirer-s3` under the key 's3-object'.
inquirer.registerPrompt('s3-object', require('inquirer-s3'));

Listing buckets and objects

By default, the inquirer-s3 prompt will list the S3 content of a given AWS account in a file-system like fashion, starting by listing available buckets in a given region, and allowing the promnpted user to navigate its buckets and objects. To start a prompt, you can use with inquirer the key that you used to register the inquirer-s3 module.

inquirer.prompt([{
  type: 's3-object',
  name: 'result',
  message: 'Which S3 object would you like to select?'
}]).then(console.log);

Parameters

A set of optional parameters can be passed to inquirer-s3. Below is a description of all the optional parameters along with their role.

• bucket - A bucket to pre-select. When specifying the bucket parameter with the name of a valid S3 account owned by your AWS account, the inquirer-s3 module will start to browse at the root of this bucket.
• objectPrefix - An S3 object prefix indicating where you'd like to start the browsing inside a bucket.

Note that it is invalid to pass an objectPrefix without specifying a valid bucket, and an error will be thrown in this case.

Handling errors

When an error occurs, the promise returned by inquirer is still resolved, but will contain an err property as in the following sample output. This is due to the fact that there are no easy way to reject the promise in Inquirer from inside a plugin prompt.

{ result: {
  err: {
    message: 'Missing credentials in config',
    errno: 'ETIMEDOUT'
  }
}

Provisionning AWS credentials

The inquirer-s3 plugin needs to retrieve STS tokens from AWS in order to interact with the S3 service on your account. The easiest way to achieve this is to have the AWS CLI installed and configured on your development or deployment machine.

Read more on Installing the AWS CLI and Configuring the AWS CLI.

If you happen to have the AWS CLI installed and configured with valid credentials on your local machine, inquirer-s3 will automatically use these credentials to authenticate against the AWS services it is making requests against.

Using AWS Profiles

If you have configured the AWS CLI with different profiles, it is possible to explicitly specify an AWS profile to use by specifying the AWS_PROFILE variable in your environment such as in the following example.

AWS_PROFILE=my-custom-profile node examples/s3-object-list.js

Specifying custom AWS credentials

If you do not have the AWS CLI installed or configured, or you would like to use inquirer-s3 with custom credentials, you can pass your AWS_ACCESS_KEY_ID and your AWS_SECRET_ACCESS_KEY as environment variables of ur application such as in the following example :

$ AWS_ACCESS_KEY_ID=<access-key-id> AWS_SECRET_ACCESS_KEY=<secret-access-key> node examples/s3-object-list.js

If you are using temporary credentials you can also specify an AWS_SESSION_TOKEN additionally to the aforementioned variables.

Examples

Runnable examples are available in the examples directory.

See also

• The inquirer interactive prompt framework.
• The s3-ls object browser library.