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 (
environment variables, and the user's home directory (
in that order of priority.
bundle config with no parameters will print a list of all
bundler configuration for the current bundle, and where that configuration
bundle config <name> will print the value of that configuration
setting, and where it was set.
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
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
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 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
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
The canonical form of this configuration is
"without". To convert the canonical
form to the environment variable form, capitalize it, and prepend
environment variable form of
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_HOMEin development and
- Disallow changes to the
Gemfile. Defaults to
:-separated list of groups whose gems bundler should not install
- Install executables from gems in the bundle to the specified directory.
- 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
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
whichever is preferable for your setup. If you use both, environment variables
will take preference over global settings.