Bundler
Bundler is a dependency management tool for Ruby applications that ensures consistent gem versions across different environments. It manages gem dependencies by reading a Gemfile to install the correct versions and resolve conflicts, making Ruby projects reproducible and easier to deploy. It is widely used in the Ruby ecosystem, particularly with frameworks like Ruby on Rails.
Developers should use Bundler when working on Ruby projects to avoid version conflicts and ensure that all team members and production servers use the same gem versions. It is essential for maintaining consistency in development, testing, and deployment environments, especially in collaborative or large-scale applications. Use cases include setting up new Ruby projects, managing dependencies in existing apps, and deploying to platforms like Heroku.