bundle

Install all gems defined in the Gemfile expected in the working directory

$ bundle install

$ bundle exec [command] [arguments]

$ bundle update

$ bundle update [gem_name1] [gem_name2]

$ bundle update --patch [gem_name1] [gem_name2]

$ bundle update --group [development]

$ bundle outdated

$ bundle gem [gem_name]

bundle [options] <command> [<args>]

-v, --verbose
    Enable verbose output

-q, --quiet
    Silence Bundler output

--version
    Display Bundler version

--help
    Show help information

--no-color
    Disable color output

--retry <number>
    Retry network requests

--path <path>
    Install gems to specific path

--without <groups>
    Exclude gem groups

--local
    Use local cached gems

--frozen
    Do not allow updating Gemfile.lock

The bundle command, part of Ruby's Bundler tool, manages gem dependencies for Ruby projects. It ensures consistent environments across development, staging, and production by installing exact gem versions specified in a Gemfile. Bundler creates a Gemfile.lock file that locks dependencies, preventing version conflicts and "it works on my machine" issues.

Key workflows include creating a Gemfile to declare dependencies, running bundle install to fetch and install gems into a vendor cache, and using bundle exec to run commands in the bundled environment. It supports groups like :development or :test for conditional loading. Bundler handles transitive dependencies automatically and provides commands for updating, checking, and visualizing dependency graphs.

Essential for modern Ruby/Rails apps, it integrates with tools like Rake and Capistrano. On Linux, install via gem install bundler or package managers like apt (ruby-bundler).

Requires Ruby and gem installed. Most subcommands need a Gemfile. Network access needed for remote gems. Can increase deployment bundle size.

install: Install gems from Gemfile.
update: Update gems or specific ones.
exec: Run command in bundle context.
show: List installed gems.
viz: Generate dependency graph.

$ bundle init # Create Gemfile
$ echo 'gem rails' >> Gemfile
$ bundle install
$ bundle exec rails server

Created by Carl Lerche in 2009 as a gem. Version 1.0 released in 2010. Integrated into Ruby core as default bundler since Ruby 2.6 (2018). Maintained by engine yard and community.

gem(1), ruby(1), rake(1)