Ruby Gems

Companion site to the book Practical Ruby Gems: Installation, Distribution, and Beyond, Second Edition, by David Berube.

abachrome

Abachrome is a comprehensive color manipulation library for Ruby applications. It provides tools for parsing, converting, and managing colors across multiple formats including hex, RGB, HSL, and named CSS colors. The gem supports advanced color spaces (RGB, HSL, Lab, Oklab, LMS, XYZ) with seamless conversion between them, gamut mapping for sRGB, P3, and Rec2020 color spaces, and high-precision calculations using BigDecimal. Whether you're building design tools, generating color palettes, or working with CSS color values, Abachrome offers the precision and flexibility needed for professional color work in Ruby.

activerecord

ActiveRecord is the object-relational mapping (ORM) layer for Ruby on Rails. It provides database abstraction, allowing you to interact with relational databases through Ruby objects rather than writing raw SQL. ActiveRecord implements the Active Record pattern, where each database table maps to a Ruby class, and each row becomes an object instance. This gem handles database connections, query generation, migrations, and model associations, making it a core component of most Rails applications.

bigdecimal

Ruby gem: bigdecimal

bundler-trivy

Ruby gem: bundler-trivy

bzip2-ffi

Ruby gem: bzip2-ffi

curb

Ruby gem: curb

devise

Devise is a flexible authentication solution for Rails applications. It provides a complete authentication system with modules for database authentication, password recovery, account confirmation, session timeout, and more. Rather than building authentication from scratch, Devise offers configurable modules you can include in your models. The gem handles common authentication tasks like password hashing with bcrypt, session management, and user registration flows, letting you focus on your application's unique requirements.

dry-inflector

dry-inflector is a string inflection library from the dry-rb ecosystem that provides methods for transforming strings between different naming conventions. It handles pluralization, singularization, camelization, and other common string transformations with support for custom inflection rules and acronyms. Unlike ActiveSupport's inflector, dry-inflector has zero dependencies and focuses solely on string transformations, making it a lightweight choice for projects that need inflection without pulling in a larger framework.

faraday

Faraday is an HTTP client library that provides a common interface for making web requests in Ruby. It uses a middleware stack architecture, allowing you to compose request and response processing through modular components. You can swap underlying HTTP adapters (like Net::HTTP, Typhoeus, or Patron) without changing your code. Faraday is particularly useful when you need to make API calls, test HTTP interactions, or build client libraries for web services.

ffi

Ruby gem: ffi

ffi-libc

Ruby gem: ffi-libc

gdk_pixbuf2

Ruby gem: gdk_pixbuf2