Provided by: ruby2.7_2.7.0-5ubuntu1.14_amd64 
NAME
bundle-config - Set bundler configuration options
SYNOPSIS
bundle config [list|get|set|unset] [name [value]]
DESCRIPTION
This command allows you to interact with Bundler´s configuration system.
Bundler loads configuration settings in this order:
1. Local config (app/.bundle/config)
2. Environmental variables (ENV)
3. Global config (~/.bundle/config)
4. Bundler default config
Executing bundle config list with will print a list of all bundler configuration for the
current bundle, and where that configuration was set.
Executing bundle config get <name> will print the value of that configuration setting, and
where it was set.
Executing bundle config set <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. If name already is set, name will be overridden and user will be
warned.
Executing bundle config set --global <name> <value> works the same as above.
Executing bundle config set --local <name> <value> will set that configuration to the
local application. The configuration will be stored in app/.bundle/config.
Executing bundle config unset <name> will delete the configuration in both local and
global sources.
Executing bundle config unset --global <name> will delete the configuration only from the
user configuration.
Executing bundle config unset --local <name> <value> will delete the configuration only
from the local application.
Executing bundle with the BUNDLE_IGNORE_CONFIG environment variable set will cause it to
ignore all configuration.
Executing bundle config set disable_multisource true upgrades the warning about the
Gemfile containing multiple primary sources to an error. Executing bundle config unset
disable_multisource downgrades this error to a warning.
REMEMBERING OPTIONS
Flags passed to bundle install or the Bundler runtime, such as --path foo or --without
production, are remembered between commands and saved to your local application´s
configuration (normally, ./.bundle/config).
However, this will be changed in bundler 3, so it´s better not to rely on this behavior.
If these options must be remembered, it´s better to set them using bundle config (e.g.,
bundle config set path foo).
The options that can be configured are:
bin Creates a directory (defaults to ~/bin) and place any executables from the gem
there. These executables run in Bundler´s context. If used, you might add this
directory to your environment´s PATH variable. For instance, if the rails gem comes
with a rails executable, this flag will create a bin/rails executable that ensures
that all referred dependencies will be resolved using the bundled gems.
deployment
In deployment mode, Bundler will ´roll-out´ the bundle for production use. Please
check carefully if you want to have this option enabled in development or test
environments.
path The location to install the specified gems to. This defaults to Rubygems´ setting.
Bundler shares this location with Rubygems, gem install ... will have gem installed
there, too. Therefore, gems installed without a --path ... setting will show up by
calling gem list. Accordingly, gems installed to other locations will not get
listed.
without
A space-separated list of groups referencing gems to skip during installation.
with A space-separated list of groups referencing gems to include during installation.
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 set 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) bundle-install.1.html
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) bundle-install.1.html 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.
Any periods in the configuration keys must be replaced with two underscores when setting
it via environment variables. The configuration key local.rack becomes the environment
variable BUNDLE_LOCAL__RACK.
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) bundle-install.1.html.
• allow_bundler_dependency_conflicts (BUNDLE_ALLOW_BUNDLER_DEPENDENCY_CONFLICTS): Allow
resolving to specifications that have dependencies on bundler that are incompatible
with the running Bundler version.
• allow_deployment_source_credential_changes
(BUNDLE_ALLOW_DEPLOYMENT_SOURCE_CREDENTIAL_CHANGES): When in deployment mode, allow
changing the credentials to a gem´s source. Ex: https://some.host.com/gems/path/ ->
https://user_name:password@some.host.com/gems/path
• allow_offline_install (BUNDLE_ALLOW_OFFLINE_INSTALL): Allow Bundler to use cached data
when installing without network access.
• auto_clean_without_path (BUNDLE_AUTO_CLEAN_WITHOUT_PATH): Automatically run bundle
clean after installing when an explicit path has not been set and Bundler is not
installing into the system gems.
• auto_install (BUNDLE_AUTO_INSTALL): Automatically run bundle install when gems are
missing.
• bin (BUNDLE_BIN): Install executables from gems in the bundle to the specified
directory. Defaults to false.
• cache_all (BUNDLE_CACHE_ALL): Cache all gems, including path and git gems.
• cache_all_platforms (BUNDLE_CACHE_ALL_PLATFORMS): Cache gems for all platforms.
• cache_path (BUNDLE_CACHE_PATH): The directory that bundler will place cached gems in
when running bundle package, and that bundler will look in when installing gems.
Defaults to vendor/cache.
• clean (BUNDLE_CLEAN): Whether Bundler should run bundle clean automatically after
bundle install.
• console (BUNDLE_CONSOLE): The console that bundle console starts. Defaults to irb.
• default_install_uses_path (BUNDLE_DEFAULT_INSTALL_USES_PATH): Whether a bundle install
without an explicit --path argument defaults to installing gems in .bundle.
• deployment (BUNDLE_DEPLOYMENT): Disallow changes to the Gemfile. When the Gemfile is
changed and the lockfile has not been updated, running Bundler commands will be
blocked.
• disable_checksum_validation (BUNDLE_DISABLE_CHECKSUM_VALIDATION): Allow installing
gems even if they do not match the checksum provided by RubyGems.
• disable_exec_load (BUNDLE_DISABLE_EXEC_LOAD): Stop Bundler from using load to launch
an executable in-process in bundle exec.
• disable_local_branch_check (BUNDLE_DISABLE_LOCAL_BRANCH_CHECK): Allow Bundler to use a
local git override without a branch specified in the Gemfile.
• disable_multisource (BUNDLE_DISABLE_MULTISOURCE): When set, Gemfiles containing
multiple sources will produce errors instead of warnings. Use bundle config unset
disable_multisource to unset.
• disable_platform_warnings (BUNDLE_DISABLE_PLATFORM_WARNINGS): Disable warnings during
bundle install when a dependency is unused on the current platform.
• disable_shared_gems (BUNDLE_DISABLE_SHARED_GEMS): Stop Bundler from accessing gems
installed to RubyGems´ normal location.
• disable_version_check (BUNDLE_DISABLE_VERSION_CHECK): Stop Bundler from checking if a
newer Bundler version is available on rubygems.org.
• force_ruby_platform (BUNDLE_FORCE_RUBY_PLATFORM): Ignore the current machine´s
platform and install only ruby platform gems. As a result, gems with native extensions
will be compiled from source.
• frozen (BUNDLE_FROZEN): Disallow changes to the Gemfile. When the Gemfile is changed
and the lockfile has not been updated, running Bundler commands will be blocked.
Defaults to true when --deployment is used.
• gem.push_key (BUNDLE_GEM__PUSH_KEY): Sets the --key parameter for gem push when using
the rake release command with a private gemstash server.
• gemfile (BUNDLE_GEMFILE): 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.
• global_gem_cache (BUNDLE_GLOBAL_GEM_CACHE): Whether Bundler should cache all gems
globally, rather than locally to the installing Ruby installation.
• ignore_messages (BUNDLE_IGNORE_MESSAGES): When set, no post install messages will be
printed. To silence a single gem, use dot notation like ignore_messages.httparty true.
• init_gems_rb (BUNDLE_INIT_GEMS_RB) Generate a gems.rb instead of a Gemfile when
running bundle init.
• jobs (BUNDLE_JOBS): The number of gems Bundler can install in parallel. Defaults to 1.
• no_install (BUNDLE_NO_INSTALL): Whether bundle package should skip installing gems.
• no_prune (BUNDLE_NO_PRUNE): Whether Bundler should leave outdated gems unpruned when
caching.
• only_update_to_newer_versions (BUNDLE_ONLY_UPDATE_TO_NEWER_VERSIONS): During bundle
update, only resolve to newer versions of the gems in the lockfile.
• path (BUNDLE_PATH): The location on disk where all gems in your bundle will be located
regardless of $GEM_HOME or $GEM_PATH values. Bundle gems not found in this location
will be installed by bundle install. Defaults to Gem.dir. When --deployment is used,
defaults to vendor/bundle.
• path.system (BUNDLE_PATH__SYSTEM): Whether Bundler will install gems into the default
system path (Gem.dir).
• path_relative_to_cwd (BUNDLE_PATH_RELATIVE_TO_CWD) Makes --path relative to the CWD
instead of the Gemfile.
• plugins (BUNDLE_PLUGINS): Enable Bundler´s experimental plugin system.
• prefer_patch (BUNDLE_PREFER_PATCH): Prefer updating only to next patch version during
updates. Makes bundle update calls equivalent to bundler update --patch.
• print_only_version_number (BUNDLE_PRINT_ONLY_VERSION_NUMBER) Print only version number
from bundler --version.
• redirect (BUNDLE_REDIRECT): The number of redirects allowed for network requests.
Defaults to 5.
• retry (BUNDLE_RETRY): The number of times to retry failed network requests. Defaults
to 3.
• setup_makes_kernel_gem_public (BUNDLE_SETUP_MAKES_KERNEL_GEM_PUBLIC): Have
Bundler.setup make the Kernel#gem method public, even though RubyGems declares it as
private.
• shebang (BUNDLE_SHEBANG): The program name that should be invoked for generated
binstubs. Defaults to the ruby install name used to generate the binstub.
• silence_deprecations (BUNDLE_SILENCE_DEPRECATIONS): Whether Bundler should silence
deprecation warnings for behavior that will be changed in the next major version.
• silence_root_warning (BUNDLE_SILENCE_ROOT_WARNING): Silence the warning Bundler prints
when installing gems as root.
• skip_default_git_sources (BUNDLE_SKIP_DEFAULT_GIT_SOURCES): Whether Bundler should
skip adding default git source shortcuts to the Gemfile DSL.
• specific_platform (BUNDLE_SPECIFIC_PLATFORM): Allow bundler to resolve for the
specific running platform and store it in the lockfile, instead of only using a
generic platform. A specific platform is the exact platform triple reported by
Gem::Platform.local, such as x86_64-darwin-16 or universal-java-1.8. On the other
hand, generic platforms are those such as ruby, mswin, or java. In this example,
x86_64-darwin-16 would map to ruby and universal-java-1.8 to java.
• ssl_ca_cert (BUNDLE_SSL_CA_CERT): Path to a designated CA certificate file or folder
containing multiple certificates for trusted CAs in PEM format.
• ssl_client_cert (BUNDLE_SSL_CLIENT_CERT): Path to a designated file containing a X.509
client certificate and key in PEM format.
• ssl_verify_mode (BUNDLE_SSL_VERIFY_MODE): The SSL verification mode Bundler uses when
making HTTPS requests. Defaults to verify peer.
• suppress_install_using_messages (BUNDLE_SUPPRESS_INSTALL_USING_MESSAGES): Avoid
printing Using ... messages during installation when the version of a gem has not
changed.
• system_bindir (BUNDLE_SYSTEM_BINDIR): The location where RubyGems installs binstubs.
Defaults to Gem.bindir.
• timeout (BUNDLE_TIMEOUT): The seconds allowed before timing out for network requests.
Defaults to 10.
• unlock_source_unlocks_spec (BUNDLE_UNLOCK_SOURCE_UNLOCKS_SPEC): Whether running bundle
update --source NAME unlocks a gem with the given name. Defaults to true.
• update_requires_all_flag (BUNDLE_UPDATE_REQUIRES_ALL_FLAG) Require passing --all to
bundle update when everything should be updated, and disallow passing no options to
bundle update.
• user_agent (BUNDLE_USER_AGENT): The custom user agent fragment Bundler includes in API
requests.
• with (BUNDLE_WITH): A :-separated list of groups whose gems bundler should install.
• without (BUNDLE_WITHOUT): A :-separated list of groups whose gems bundler should not
install.
In general, you should set these settings per-application by using the applicable flag to
the bundle install(1) bundle-install.1.html or bundle package(1) bundle-package.1.html
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.
LOCAL GIT REPOS
Bundler also allows you to work against a git repository locally instead of using the
remote version. This can be achieved by setting up a local override:
bundle config set local.GEM_NAME /path/to/local/git/repository
For example, in order to use a local Rack repository, a developer could call:
bundle config set local.rack ~/Work/git/rack
Now instead of checking out the remote git repository, the local override will be used.
Similar to a path source, every time the local git repository change, changes will be
automatically picked up by Bundler. This means a commit in the local git repo will update
the revision in the Gemfile.lock to the local git repo revision. This requires the same
attention as git submodules. Before pushing to the remote, you need to ensure the local
override was pushed, otherwise you may point to a commit that only exists in your local
machine. You´ll also need to CGI escape your usernames and passwords as well.
Bundler does many checks to ensure a developer won´t work with invalid references.
Particularly, we force a developer to specify a branch in the Gemfile in order to use this
feature. If the branch specified in the Gemfile and the current branch in the local git
repository do not match, Bundler will abort. This ensures that a developer is always
working against the correct branches, and prevents accidental locking to a different
branch.
Finally, Bundler also ensures that the current revision in the Gemfile.lock exists in the
local git repository. By doing this, Bundler forces you to fetch the latest changes in the
remotes.
MIRRORS OF GEM SOURCES
Bundler supports overriding gem sources with mirrors. This allows you to configure
rubygems.org as the gem source in your Gemfile while still using your mirror to fetch
gems.
bundle config set mirror.SOURCE_URL MIRROR_URL
For example, to use a mirror of rubygems.org hosted at rubygems-mirror.org:
bundle config set mirror.http://rubygems.org http://rubygems-mirror.org
Each mirror also provides a fallback timeout setting. If the mirror does not respond
within the fallback timeout, Bundler will try to use the original server instead of the
mirror.
bundle config set mirror.SOURCE_URL.fallback_timeout TIMEOUT
For example, to fall back to rubygems.org after 3 seconds:
bundle config set mirror.https://rubygems.org.fallback_timeout 3
The default fallback timeout is 0.1 seconds, but the setting can currently only accept
whole seconds (for example, 1, 15, or 30).
CREDENTIALS FOR GEM SOURCES
Bundler allows you to configure credentials for any gem source, which allows you to avoid
putting secrets into your Gemfile.
bundle config set SOURCE_HOSTNAME USERNAME:PASSWORD
For example, to save the credentials of user claudette for the gem source at
gems.longerous.com, you would run:
bundle config set gems.longerous.com claudette:s00pers3krit
Or you can set the credentials as an environment variable like this:
export BUNDLE_GEMS__LONGEROUS__COM="claudette:s00pers3krit"
For gems with a git source with HTTP(S) URL you can specify credentials like so:
bundle config set https://github.com/bundler/bundler.git username:password
Or you can set the credentials as an environment variable like so:
export BUNDLE_GITHUB__COM=username:password
This is especially useful for private repositories on hosts such as Github, where you can
use personal OAuth tokens:
export BUNDLE_GITHUB__COM=abcd0123generatedtoken:x-oauth-basic
CONFIGURE BUNDLER DIRECTORIES
Bundler´s home, config, cache and plugin directories are able to be configured through
environment variables. The default location for Bundler´s home directory is ~/.bundle,
which all directories inherit from by default. The following outlines the available
environment variables and their default values
BUNDLE_USER_HOME : $HOME/.bundle
BUNDLE_USER_CACHE : $BUNDLE_USER_HOME/cache
BUNDLE_USER_CONFIG : $BUNDLE_USER_HOME/config
BUNDLE_USER_PLUGIN : $BUNDLE_USER_HOME/plugin
December 2019 BUNDLE-CONFIG(1)