A command-line tool to manage S3 buckets
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Buckler is a Ruby command line tool for performing common actions on Amazon S3 buckets. It’s more do-what-you-want and less overwhelmingly powerful than the AWS CLI. It’s also designed to work with Heroku applications.

Installing Buckler

Buckler requires at least Ruby 2.2.3. Get Buckler from Rubygems. The terminal command is called bucket.

gem install buckler
bucket help

Neat Features

  • Buckler will "context switch" with you as you change project folders. It discovers AWS credentials in your .env files and Heroku applications.
  • Prompts you to confirm dangerous actions.
  • Works with bucket versioning. Issues reversible delete commands for versioned bucket objects.
  • The bucket sync command spends extra time doing what you want when you "copy" a bucket. The following properties on each object are also transferred: ACLs, metadata, storage class, Cache-Control header, and Content-* headers, and Expires header. This lets you get close to an exact copy of a bucket for testing migrations or other destructive changes.

Command Reference

# Get a list of your buckets
bucket list

# Run any command with additional debugging info
bucket list --verbose

# Get a list of all S3 regions
bucket regions

# Create a new bucket on your account
bucket create new-bucket-name

# Create a new bucket on your account in a different region
bucket create new-bucket-name --region eu-west-1

# Remove all objects from one of your buckets
bucket empty bucket-name

# Destroy one of your buckets
bucket destroy bucket-name

# Copy the contents of one bucket into another
# This command also conveniently copies
# ACLs, headers, metadata, and a lot more.
bucket sync source-bucket-name target-bucket-name

# Get detailed help with Buckler commands
bucket help
bucket help sync
bucket help create
bucket help destroy
bucket help empty
bucket help list
bucket help regions

Providing Credentials

You will need a AWS Access Key ID and AWS Secret Access Key pair with permission to mange your S3 buckets. Do not use your root keys. Generate a new set of keys with S3 permissions only.

When you run the bucket command, Buckler tries to automatically discover AWS credentials around your working directory.

Dotenv: If the current folder has a file named .env, Buckler will look for variables called AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY in the file. See Heroku’s documentation on this environment file format.

Heroku: If the current folder has a Git repository with a Heroku remote, Buckler will ask your Heroku application for variables named AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY using heroku config:get

Command Line Options: You can set the pair directly by providing the command line options --id and --secret

bucket list --id YOUR_AWS_ID --secret YOUR_AWS_SECRET

Environment Variables: You can set the pair directly as environment variables.

AWS_ACCESS_KEY_ID=your-id AWS_SECRET_ACCESS_KEY=your-secret bucket list

Developing Buckler

The Buckler test suite will create and destroy test buckets on your AWS account which will cost you more than 0 money. Existing buckets won’t be affected.

# Fork or clone Buckler
git clone -o github git@github.com:csuhta/buckler.git
cd buckler

# Set your credentials in a .env
echo "AWS_ACCESS_KEY_ID=your-id" >> .env
echo "AWS_SECRET_ACCESS_KEY_ID=your-secret" >> .env

# Work on stuff, then run the test suite
rake test


Buckler is free software, and may be redistributed under the terms of the MIT license. Hope you like it! ❤️