bundle

The "bundle" command line tool is part of the Ruby programming language ecosystem and is used with RubyGems. Bundler, which is powered by the "bundle" tool, is a package manager for managing Ruby libraries and dependencies within a project.

With the "bundle" command, you can manage the installation and execution of gems (Ruby libraries) for a specific project, ensuring that the correct versions and dependencies are used. It helps ensure that different projects can have their own independent gem environments, avoiding conflicts between libraries required by different applications.

Some common uses of the "bundle" command include:

1. Installing gems: By running "bundle install" in the project directory, Bundler reads the project's Gemfile (a file specifying gems and their versions) and installs the required gems, downloading them from the RubyGems repository.

2. Running a script or application: Instead of directly executing a Ruby script or application, you can use "bundle exec" followed by the script command to ensure it runs within the context of the bundled gems. This helps guarantee that the correct gem versions and dependencies are used.

3. Updating gems: Running "bundle update" will analyze the Gemfile and retrieve the latest available versions of the gems specified, updating them in the project's gem environment.

4. Managing gem environments: Bundler allows you to create an isolated environment for gems specific to a project using "bundle config" commands. This enables easy switching between different gem configurations, such as using different versions for different projects.

Overall, the "bundle" command line tool simplifies the management and deployment of Ruby libraries, ensuring consistency and avoiding conflicts between different projects' gem dependencies.