What is Bundler?

Web Development Jargons Explained in 4 Different Ways

TLDR: Bundler ensures a Ruby project is run in the same condition on different machines consistently. It does this by keeping track of a list of Gems and their versions required for a project to run correctly.


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Bundler ensures a Ruby project is run in the same condition on different machines consistently. It does this by keeping track of a list of Gems and their versions required for a project to run correctly.

Bundler is often used together with RubyGems in Ruby projects. When an engineer starts work on an existing project for the first time, he/she will often use Bundler to install all the necessary Gems required by the project.

Bundler can also be used to update a collection of Gems. Bundler makes sure updated versions of different Gems are compatible with each other.

Explain like I'm a total nerd

RubyGems deals with the creation, distribution, versioning of individual Gems. Bundler deals with a collection of Gems required by a project.

Bundler tracks all the Gems used in a Ruby project in a file called "Gemfile". When an engineer starts work on an existing project for the first time. He/she will use Bundler to install all the Gems defined in the Gemfile.

Bundler is also a Gem itself. You can install or update Bundler using RubyGem command line tools.

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Most of the time a project doesn't behave properly because we forgot to update or install Gems. bundle install is often the remedy to our headaches.

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