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bundle config

bundle-config - Set bundler configuration options

bundle config [name [value]]


This command allows you to interact with bundler's configuration system. Bundler retrieves its configuration from the local application (app/.bundle/config), environment variables, and the user's home directory (~/.bundle/config), in that order of priority.

Executing bundle config with no parameters will print a list of all bundler configuration for the current bundle, and where that configuration was set.

Executing bundle config <name> will print the value of that configuration setting, and where it was set.

Executing bundle config <name> <value> will set that configuration to the value specified for all bundles executed as the current user. The configuration will be stored in ~/.bundle/config.

Build Options

You can use bundle config to give bundler the flags to pass to the gem installer every time bundler tries to install a particular gem.

A very common example, the mysql gem, requires Snow Leopard users to pass configuration flags to gem install to specify where to find the mysql_config executable.

gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

Since the specific location of that executable can change from machine to machine, you can specify these flags on a per-machine basis.

bundle config build.mysql --with-mysql-config=/usr/local/mysql/bin/mysql_config

After running this command, every time bundler needs to install the mysql gem, it will pass along the flags you specified.

Configuration Keys

Configuration keys in bundler have two forms: the canonical form and the environment variable form.

For instance, passing the --without flag to bundle install(1) prevents Bundler from installing certain groups specified in the Gemfile(5). Bundler persists this value in app/.bundle/config so that calls to Bundler.setup do not try to find gems from the Gemfile that you didn't install. Additionally, subsequent calls to bundle install(1) remember this setting and skip those groups.

The canonical form of this configuration is "without". To convert the canonical form to the environment variable form, capitalize it, and prepend BUNDLE_. The environment variable form of "without" is BUNDLE_WITHOUT.

List Of Available Keys

The following is a list of all configuration keys and their purpose. You can learn more about their operation in bundle install(1).

The location on disk to install gems. Defaults to $GEM_HOME in development and vendor/bundler when --deployment is used
Disallow changes to the Gemfile. Defaults to true when --deployment is used.
A :-separated list of groups whose gems bundler should not install
Install executables from gems in the bundle to the specified directory. Defaults to false.
The name of the file that bundler should use as the Gemfile. This location of this file also sets the root of the project, which is used to resolve relative paths in the Gemfile, among other things. By default, bundler will search up from the current working directory until it finds a Gemfile.

In general, you should set these settings per-application by using the applicable flag to the bundle install(1) command.

You can set them globally either via environment variables or bundle config, whichever is preferable for your setup. If you use both, environment variables will take preference over global settings.