ruby--ruby/man/bundle-install.1.txt

BUNDLE-INSTALL(1)                                            BUNDLE-INSTALL(1)



NAME
       bundle-install - Install the dependencies specified in your Gemfile

SYNOPSIS
       bundle   install   [--binstubs[=DIRECTORY]]   [--clean]  [--deployment]
       [--frozen] [--full-index] [--gemfile=GEMFILE] [--jobs=NUMBER] [--local]
       [--no-cache]   [--no-prune]   [--path  PATH]  [--quiet]  [--redownload]
       [--retry=NUMBER]    [--shebang]    [--standalone[=GROUP[    GROUP...]]]
       [--system]     [--trust-policy=POLICY]     [--with=GROUP[    GROUP...]]
       [--without=GROUP[ GROUP...]]

DESCRIPTION
       Install the gems specified in your Gemfile(5). If  this  is  the  first
       time  you  run  bundle  install  (and  a  Gemfile.lock does not exist),
       Bundler will fetch all remote sources, resolve dependencies and install
       all needed gems.

       If a Gemfile.lock does exist, and you have not updated your Gemfile(5),
       Bundler will  fetch  all  remote  sources,  but  use  the  dependencies
       specified in the Gemfile.lock instead of resolving dependencies.

       If  a  Gemfile.lock  does  exist, and you have updated your Gemfile(5),
       Bundler will use the dependencies in the Gemfile.lock for all gems that
       you  did  not update, but will re-resolve the dependencies of gems that
       you did update. You can find more information about this update process
       below under CONSERVATIVE UPDATING.

OPTIONS
       To  apply  any  of --binstubs, --deployment, --path, or --without every
       time bundle install is run, use bundle config (see bundle-config(1)).

       --binstubs[=<directory>]
              Binstubs are  scripts  that  wrap  around  executables.  Bundler
              creates  a  small Ruby file (a binstub) that loads Bundler, runs
              the command, and puts it in bin/. This lets you link the binstub
              inside   of   an  application  to  the  exact  gem  version  the
              application needs.

              Creates  a  directory  (defaults  to  ~/bin)  and   places   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.

       --clean
              On finishing the installation Bundler is  going  to  remove  any
              gems  not  present  in the current Gemfile(5). Don't worry, gems
              currently in use will not be removed.

       --deployment
              In deployment mode,  Bundler  will  'roll-out'  the  bundle  for
              production or CI use. Please check carefully if you want to have
              this option enabled in your development environment.

       --redownload
              Force download every gem, even  if  the  required  versions  are
              already available locally.

       --frozen
              Do  not allow the Gemfile.lock to be updated after this install.
              Exits  non-zero  if  there  are  going  to  be  changes  to  the
              Gemfile.lock.

       --full-index
              Bundler  will  not  call  Rubygems'  API  endpoint (default) but
              download and cache a (currently big) index  file  of  all  gems.
              Performance can be improved for large bundles that seldom change
              by enabling this option.

       --gemfile=<gemfile>
              The location of the Gemfile(5) which Bundler  should  use.  This
              defaults  to  a  Gemfile(5) in the current working directory. In
              general, Bundler will assume that the location of the Gemfile(5)
              is also the project's root and will try to find Gemfile.lock and
              vendor/cache relative to this location.

       --jobs=[<number>], -j[<number>]
              The maximum number of parallel download and  install  jobs.  The
              default is 1.

       --local
              Do not attempt to connect to rubygems.org. Instead, Bundler will
              use  the  gems  already  present  in  Rubygems'  cache   or   in
              vendor/cache.  Note  that if a appropriate platform-specific gem
              exists on rubygems.org it will not be found.

       --no-cache
              Do not update the cache in vendor/cache with the  newly  bundled
              gems.  This  does not remove any gems in the cache but keeps the
              newly bundled gems from being cached during the install.

       --no-prune
              Don't remove stale gems from the  cache  when  the  installation
              finishes.

       --path=<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.

       --quiet
              Do not  print  progress  information  to  the  standard  output.
              Instead, Bundler will exit using a status code ($?).

       --retry=[<number>]
              Retry failed network or git requests for number times.

       --shebang=<ruby-executable>
              Uses the specified ruby executable (usually ruby) to execute the
              scripts  created  with  --binstubs.  In  addition,  if  you  use
              --binstubs  together with --shebang jruby these executables will
              be changed to execute jruby instead.

       --standalone[=<list>]
              Makes a bundle that can work without depending  on  Rubygems  or
              Bundler  at runtime. A space separated list of groups to install
              has to be specified. Bundler creates a  directory  named  bundle
              and   installs   the   bundle   there.   It   also  generates  a
              bundle/bundler/setup.rb file to replace Bundler's own  setup  in
              the  manner  required.  Using  this option implicitly sets path,
              which is a [remembered option][REMEMBERED OPTIONS].

       --system
              Installs the gems  specified  in  the  bundle  to  the  system's
              Rubygems  location. This overrides any previous configuration of
              --path.

       --trust-policy=[<policy>]
              Apply the Rubygems security policy policy, where policy  is  one
              of  HighSecurity, MediumSecurity, LowSecurity, AlmostNoSecurity,
              or NoSecurity. For more details, please see the Rubygems signing
              documentation linked below in SEE ALSO.

       --with=<list>
              A space-separated list of groups referencing gems to install. If
              an optional group is given it is installed. If a group is  given
              that  is in the remembered list of groups given to --without, it
              is removed from that list.

       --without=<list>
              A space-separated list of groups referencing gems to skip during
              installation. If a group is given that is in the remembered list
              of groups given to --with, it is removed from that list.

DEPLOYMENT MODE
       Bundler's defaults are optimized for development. To switch to defaults
       optimized  for deployment and for CI, use the --deployment flag. Do not
       activate deployment mode on development machines, as it will  cause  an
       error when the Gemfile(5) is modified.

       1.  A Gemfile.lock is required.

           To ensure that the same versions of the gems you developed with and
           tested with  are  also  used  in  deployments,  a  Gemfile.lock  is
           required.

           This   is  mainly  to  ensure  that  you  remember  to  check  your
           Gemfile.lock into version control.

       2.  The Gemfile.lock must be up to date

           In development, you can modify your Gemfile(5)  and  re-run  bundle
           install to conservatively update your Gemfile.lock snapshot.

           In  deployment, your Gemfile.lock should be up-to-date with changes
           made in your Gemfile(5).

       3.  Gems  are  installed  to  vendor/bundle  not  your  default  system
           location

           In  development,  it's  convenient  to  share the gems used in your
           application with other applications and other scripts that  run  on
           the system.

           In  deployment, isolation is a more important default. In addition,
           the user deploying the  application  may  not  have  permission  to
           install  gems  to  the  system,  or  the  web  server  may not have
           permission to read them.

           As a result, bundle  install  --deployment  installs  gems  to  the
           vendor/bundle  directory in the application. This may be overridden
           using the --path option.



SUDO USAGE
       By default, Bundler installs gems to the same location as gem install.

       In some cases, that location may not be writable by your Unix user.  In
       that case, Bundler will stage everything in a temporary directory, then
       ask you for your sudo password in order to copy  the  gems  into  their
       system location.

       From  your  perspective,  this  is  identical  to  installing  the gems
       directly into the system.

       You should never use sudo bundle install. This is because several other
       steps in bundle install must be performed as the current user:

       o   Updating your Gemfile.lock

       o   Updating your vendor/cache, if necessary

       o   Checking out private git repositories using your user's SSH keys



       Of  these  three,  the  first  two  could theoretically be performed by
       chowning the resulting files to $SUDO_USER.  The  third,  however,  can
       only  be  performed  by  invoking  the git command as the current user.
       Therefore, git gems are downloaded and installed into ~/.bundle  rather
       than $GEM_HOME or $BUNDLE_PATH.

       As  a  result,  you  should run bundle install as the current user, and
       Bundler will ask for your password if it is needed to put the gems into
       their final location.

INSTALLING GROUPS
       By  default, bundle install will install all gems in all groups in your
       Gemfile(5), except those declared for a different platform.

       However, you can explicitly tell Bundler  to  skip  installing  certain
       groups  with  the --without option. This option takes a space-separated
       list of groups.

       While the --without  option  will  skip  installing  the  gems  in  the
       specified  groups,  it  will  still download those gems and use them to
       resolve the dependencies of every gem in your Gemfile(5).

       This is so that installing a different set of groups on another machine
       (such  as  a  production  server) will not change the gems and versions
       that you have already developed and tested against.

       Bundler offers a rock-solid guarantee that the third-party code you are
       running in development and testing is also the third-party code you are
       running in production. You can choose to exclude some of that  code  in
       different  environments,  but  you  will never be caught flat-footed by
       different  versions  of  third-party  code  being  used  in   different
       environments.

       For a simple illustration, consider the following Gemfile(5):



           source 'https://rubygems.org'

           gem 'sinatra'

           group :production do
             gem 'rack-perftools-profiler'
           end



       In  this  case,  sinatra depends on any version of Rack (>= 1.0), while
       rack-perftools-profiler depends on 1.x (~> 1.0).

       When you run bundle install --without  production  in  development,  we
       look  at the dependencies of rack-perftools-profiler as well. That way,
       you do not spend all your time developing against Rack 2.0,  using  new
       APIs  unavailable  in Rack 1.x, only to have Bundler switch to Rack 1.2
       when the production group is used.

       This should not cause any problems  in  practice,  because  we  do  not
       attempt  to  install the gems in the excluded groups, and only evaluate
       as part of the dependency resolution process.

       This also means that you cannot include different versions of the  same
       gem  in  different  groups,  because doing so would result in different
       sets of dependencies used in development and production. Because of the
       vagaries  of  the  dependency  resolution process, this usually affects
       more than the gems you list in your Gemfile(5), and can  (surprisingly)
       radically change the gems you are using.

THE GEMFILE.LOCK
       When  you  run  bundle install, Bundler will persist the full names and
       versions of all gems that you used (including dependencies of the  gems
       specified in the Gemfile(5)) into a file called Gemfile.lock.

       Bundler uses this file in all subsequent calls to bundle install, which
       guarantees that you always use  the  same  exact  code,  even  as  your
       application moves across machines.

       Because  of the way dependency resolution works, even a seemingly small
       change (for instance, an update to a point-release of a dependency of a
       gem  in  your  Gemfile(5)) can result in radically different gems being
       needed to satisfy all dependencies.

       As a result, you SHOULD check your Gemfile.lock into  version  control,
       in both applications and gems. If you do not, every machine that checks
       out your repository (including your production server) will resolve all
       dependencies   again,  which  will  result  in  different  versions  of
       third-party code being used if any of the gems in the Gemfile(5) or any
       of their dependencies have been updated.

       When  Bundler  first  shipped,  the  Gemfile.lock  was  included in the
       .gitignore file included with generated gems. Over  time,  however,  it
       became  clear that this practice forces the pain of broken dependencies
       onto new contributors, while leaving existing contributors  potentially
       unaware  of the problem. Since bundle install is usually the first step
       towards  a  contribution,  the  pain  of  broken   dependencies   would
       discourage  new  contributors  from  contributing. As a result, we have
       revised our guidance for gem authors to now recommend checking  in  the
       lock for gems.

CONSERVATIVE UPDATING
       When  you  make a change to the Gemfile(5) and then run bundle install,
       Bundler will update only the gems that you modified.

       In other words, if a gem that you did  not  modify  worked  before  you
       called  bundle install, it will continue to use the exact same versions
       of all dependencies as it used before the update.

       Let's take a look at an example. Here's your original Gemfile(5):



           source 'https://rubygems.org'

           gem 'actionpack', '2.3.8'
           gem 'activemerchant'



       In  this  case,  both   actionpack   and   activemerchant   depend   on
       activesupport.  The  actionpack  gem depends on activesupport 2.3.8 and
       rack ~> 1.1.0, while the activemerchant gem depends on activesupport >=
       2.3.2, braintree >= 2.0.0, and builder >= 2.0.0.

       When   the   dependencies  are  first  resolved,  Bundler  will  select
       activesupport 2.3.8, which satisfies the requirements of both  gems  in
       your Gemfile(5).

       Next, you modify your Gemfile(5) to:



           source 'https://rubygems.org'

           gem 'actionpack', '3.0.0.rc'
           gem 'activemerchant'



       The  actionpack  3.0.0.rc  gem  has  a  number of new dependencies, and
       updates the  activesupport  dependency  to  =  3.0.0.rc  and  the  rack
       dependency to ~> 1.2.1.

       When  you  run  bundle  install,  Bundler  notices that you changed the
       actionpack gem, but not the activemerchant gem. It evaluates  the  gems
       currently being used to satisfy its requirements:

       activesupport 2.3.8
              also  used  to  satisfy a dependency in activemerchant, which is
              not being updated

       rack ~> 1.1.0
              not currently being used to satisfy another dependency

       Because you did not explicitly ask to update activemerchant, you  would
       not  expect  it  to  suddenly  stop  working after updating actionpack.
       However,  satisfying  the  new  activesupport  3.0.0.rc  dependency  of
       actionpack requires updating one of its dependencies.

       Even  though  activemerchant  declares  a  very  loose  dependency that
       theoretically matches activesupport 3.0.0.rc, Bundler  treats  gems  in
       your  Gemfile(5)  that have not changed as an atomic unit together with
       their dependencies. In this  case,  the  activemerchant  dependency  is
       treated  as  activemerchant  1.7.1  +  activesupport  2.3.8,  so bundle
       install will report that it cannot update actionpack.

       To explicitly update actionpack, including its dependencies which other
       gems  in  the  Gemfile(5) still depend on, run bundle update actionpack
       (see bundle update(1)).

       Summary: In general, after making a change  to  the  Gemfile(5)  ,  you
       should  first  try  to run bundle install, which will guarantee that no
       other gem in the Gemfile(5) is impacted by the change. If that does not
       work, run bundle update(1) bundle-update.1.html.

SEE ALSO
       o   Gem                           install                          docs
           http://guides.rubygems.org/rubygems-basics/#installing-gems

       o   Rubygems signing docs http://guides.rubygems.org/security/






                                   June 2020                 BUNDLE-INSTALL(1)