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NAME
bundle-config - Set bundler configuration options
SYNOPSIS
bundle config [name [value]]
DESCRIPTION
This command allows you to interact with bundler's configuration sys-
tem. Bundler retrieves its configuration from the local application
(app/.bundle/config), environment variables, and the user's home direc-
tory (~/.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 configura-
tion was set.
Executing bundle config <name> will print the value of that configura-
tion 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. If name already is
set, name will be overridden and user will be warned.
Executing bundle config --global <name> <value> works the same as
above.
Executing bundle config --local <name> <value> will set that configura-
tion to the local application. The configuration will be stored in
app/.bundle/config.
Executing bundle config --delete <name> will delete the configuration
in both local and global sources. Not compatible with --global or
--local flag.
Executing bundle with the BUNDLE_IGNORE_CONFIG environment variable set
will cause it to ignore all configuration.
Executing bundle config disable_multisource true upgrades the warning
about the Gemfile containing multiple primary sources to an error. Exe-
cuting bundle config --delete 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 not remembered between commands. If
these options must be remembered,they must be set using bundle config
(e.g., bundle config path foo).
The options that can be configured are:
binstubs
Creates a directory (defaults to ~/bin) and place any executa-
bles from the gem there. These executables run in Bundler's con-
text. If used, you might add this directory to your environ-
ment'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 pro-
duction 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.
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) bun-
dle-install.1.html prevents Bundler from installing certain groups
specified in the Gemfile(5). Bundler persists this value in app/.bun-
dle/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 BUN-
DLE_WITHOUT.
Any periods in the configuration keys must be replaced with two under-
scores 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) bun-
dle-install.1.html.
o 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.
o frozen (BUNDLE_FROZEN): Disallow changes to the Gemfile. Defaults
to true when --deployment is used.
o without (BUNDLE_WITHOUT): A :-separated list of groups whose gems
bundler should not install
o bin (BUNDLE_BIN): Install executables from gems in the bundle to
the specified directory. Defaults to false.
o 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 Gem-
file, among other things. By default, bundler will search up from
the current working directory until it finds a Gemfile.
o ssl_ca_cert (BUNDLE_SSL_CA_CERT): Path to a designated CA certifi-
cate file or folder containing multiple certificates for trusted
CAs in PEM format.
o ssl_client_cert (BUNDLE_SSL_CLIENT_CERT): Path to a designated file
containing a X.509 client certificate and key in PEM format.
o 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.
o disable_multisource (BUNDLE_DISABLE_MULTISOURCE): When set, Gem-
files containing multiple sources will produce errors instead of
warnings. Use bundle config --delete disable_multisource to unset.
o 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.
o retry (BUNDLE_RETRY): The number of times to retry failed network
requests. Defaults to 3.
o redirect (BUNDLE_REDIRECT): The number of redirects allowed for
network requests. Defaults to 5.
o timeout (BUNDLE_TIMEOUT): The seconds allowed before timing out for
network requests. Defaults to 10.
In general, you should set these settings per-application by using the
applicable flag to the bundle install(1) bundle-install.1.html or bun-
dle 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, envi-
ronment 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 local.GEM_NAME /path/to/local/git/repository
For example, in order to use a local Rack repository, a developer could
call:
bundle config local.rack ~/Work/git/rack
Now instead of checking out the remote git repository, the local over-
ride 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 com-
mit that only exists in your local machine.
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 Gem-
file.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 mirror.SOURCE_URL MIRROR_URL
For example, to use a mirror of rubygems.org hosted at
bundle config mirror.http://rubygems.org http://rubygems-mirror.org
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 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 gems.longerous.com claudette:s00pers3krit
Or you can set the credentials as an environment variable like this:
export BUNDLE_GEMS__LONGEROUS__COM="claudette:s00pers3krit"
December 2016 BUNDLE-CONFIG(1)
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