BUNDLE-UPDATE(1)					      BUNDLE-UPDATE(1)



NAME
       bundle-update - Update your gems to the latest available versions

SYNOPSIS
       bundle  update  *gems  [--all] [--group=NAME] [--source=NAME] [--local]
       [--ruby] [--bundler[=VERSION]] [--full-index]  [--jobs=JOBS]  [--quiet]
       [--patch|--minor|--major] [--redownload] [--strict] [--conservative]

DESCRIPTION
       Update  the  gems specified (all gems, if --all flag is used), ignoring
       the previously installed gems specified in the  Gemfile.lock.  In  gen-
       eral, you should use bundle install(1) bundle-install.1.html to install
       the same exact gems and versions across machines.

       You would use bundle update to explicitly update the version of a gem.

OPTIONS
       --all  Update all gems specified in Gemfile.

       --group=<name>, -g=[<name>]
	      Only update the gems in the specified group. For	instance,  you
	      can  update all gems in the development group with bundle update
	      --group development. You	can  also  call  bundle  update  rails
	      --group  test  to  update the rails gem and all gems in the test
	      group, for example.

       --source=<name>
	      The name of a :git or :path source used in the  Gemfile(5).  For
	      instance,        with	   a	    :git       source	    of
	      http://github.com/rails/rails.git, you would call bundle	update
	      --source rails

       --local
	      Do  not  attempt	to  fetch  gems remotely and use the gem cache
	      instead.

       --ruby Update the locked version of Ruby  to  the  current  version  of
	      Ruby.

       --bundler
	      Update the locked version of bundler to the invoked bundler ver-
	      sion.

       --full-index
	      Fall back to using the single-file index of all gems.

       --jobs=[<number>], -j[<number>]
	      Specify the number of jobs to run in parallel. The default is 1.

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

       --quiet
	      Only output warnings and errors.

       --redownload
	      Force downloading every gem.

       --patch
	      Prefer updating only to next patch version.

       --minor
	      Prefer updating only to next minor version.

       --major
	      Prefer updating to next major version (default).

       --strict
	      Do not allow any gem to be updated past latest --patch | --minor
	      | --major.

       --conservative
	      Use bundle install conservative update behavior and do not allow
	      shared dependencies to be updated.

UPDATING ALL GEMS
       If you run bundle update --all,	bundler  will  ignore  any  previously
       installed  gems	and resolve all dependencies again based on the latest
       versions of all gems available in the sources.

       Consider the following Gemfile(5):



	   source "https://rubygems.org"

	   gem "rails", "3.0.0.rc"
	   gem "nokogiri"



       When you run bundle install(1) bundle-install.1.html  the  first  time,
       bundler	will  resolve  all  of the dependencies, all the way down, and
       install what you need:



	   Fetching gem metadata from https://rubygems.org/.........
	   Resolving dependencies...
	   Installing builder 2.1.2
	   Installing abstract 1.0.0
	   Installing rack 1.2.8
	   Using bundler 1.7.6
	   Installing rake 10.4.0
	   Installing polyglot 0.3.5
	   Installing mime-types 1.25.1
	   Installing i18n 0.4.2
	   Installing mini_portile 0.6.1
	   Installing tzinfo 0.3.42
	   Installing rack-mount 0.6.14
	   Installing rack-test 0.5.7
	   Installing treetop 1.4.15
	   Installing thor 0.14.6
	   Installing activesupport 3.0.0.rc
	   Installing erubis 2.6.6
	   Installing activemodel 3.0.0.rc
	   Installing arel 0.4.0
	   Installing mail 2.2.20
	   Installing activeresource 3.0.0.rc
	   Installing actionpack 3.0.0.rc
	   Installing activerecord 3.0.0.rc
	   Installing actionmailer 3.0.0.rc
	   Installing railties 3.0.0.rc
	   Installing rails 3.0.0.rc
	   Installing nokogiri 1.6.5

	   Bundle complete! 2 Gemfile dependencies, 26 gems total.
	   Use `bundle show [gemname]` to see where a bundled gem is installed.



       As you can see, even though you have two gems in the  Gemfile(5),  your
       application  needs 26 different gems in order to run. Bundler remembers
       the exact versions it installed in Gemfile.lock. The next time you  run
       bundle  install(1)  bundle-install.1.html, bundler skips the dependency
       resolution and installs the same gems as it installed last time.

       After checking in the Gemfile.lock into version control and cloning  it
       on  another  machine,  running  bundle install(1) bundle-install.1.html
       will still install the gems that you installed  last  time.  You  don't
       need to worry that a new release of erubis or mail changes the gems you
       use.

       However, from time to time, you might want to update the gems  you  are
       using  to  the  newest  versions that still match the gems in your Gem-
       file(5).

       To do this, run	bundle	update	--all,	which  will  ignore  the  Gem-
       file.lock,  and	resolve  all the dependencies again. Keep in mind that
       this process can result in a significantly  different  set  of  the  25
       gems,  based  on  the  requirements  of	new  gems that the gem authors
       released since the last time you ran bundle update --all.

UPDATING A LIST OF GEMS
       Sometimes, you want to update a single gem in the Gemfile(5), and leave
       the  rest  of the gems that you specified locked to the versions in the
       Gemfile.lock.

       For instance, in the scenario above,  imagine  that  nokogiri  releases
       version 1.4.4, and you want to update it without updating Rails and all
       of its dependencies. To do this, run bundle update nokogiri.

       Bundler will update nokogiri and any of	its  dependencies,  but  leave
       alone Rails and its dependencies.

OVERLAPPING DEPENDENCIES
       Sometimes,  multiple  gems declared in your Gemfile(5) are satisfied by
       the same second-level dependency. For instance, consider  the  case  of
       thin and rack-perftools-profiler.



	   source "https://rubygems.org"

	   gem "thin"
	   gem "rack-perftools-profiler"



       The  thin  gem  depends	on  rack >= 1.0, while rack-perftools-profiler
       depends on rack ~> 1.0. If you run bundle install, you get:



	   Fetching source index for https://rubygems.org/
	   Installing daemons (1.1.0)
	   Installing eventmachine (0.12.10) with native extensions
	   Installing open4 (1.0.1)
	   Installing perftools.rb (0.4.7) with native extensions
	   Installing rack (1.2.1)
	   Installing rack-perftools_profiler (0.0.2)
	   Installing thin (1.2.7) with native extensions
	   Using bundler (1.0.0.rc.3)



       In this case, the two gems have their own set of dependencies, but they
       share  rack  in	common.  If  you  run bundle update thin, bundler will
       update daemons, eventmachine and rack, which are dependencies of  thin,
       but   not   open4   or	perftools.rb,	which	are   dependencies  of
       rack-perftools_profiler. Note that bundle update thin will update  rack
       even though it's also a dependency of rack-perftools_profiler.

       In  short,  by  default,  when  you  update  a gem using bundle update,
       bundler will update all dependencies of that gem, including those  that
       are also dependencies of another gem.

       To prevent updating shared dependencies, prior to version 1.14 the only
       option was the CONSERVATIVE UPDATING behavior in bundle install(1) bun-
       dle-install.1.html:

       In this scenario, updating the thin version manually in the Gemfile(5),
       and then running  bundle  install(1)  bundle-install.1.html  will  only
       update  daemons	and  eventmachine, but not rack. For more information,
       see  the  CONSERVATIVE  UPDATING  section  of  bundle  install(1)  bun-
       dle-install.1.html.

       Starting with 1.14, specifying the --conservative option will also pre-
       vent shared dependencies from being updated.

PATCH LEVEL OPTIONS
       Version 1.14 introduced 4 patch-level options that will	influence  how
       gem  versions  are  resolved. One of the following options can be used:
       --patch, --minor or --major. --strict can be added to further influence
       resolution.

       --patch
	      Prefer updating only to next patch version.

       --minor
	      Prefer updating only to next minor version.

       --major
	      Prefer updating to next major version (default).

       --strict
	      Do not allow any gem to be updated past latest --patch | --minor
	      | --major.

       When Bundler is resolving what versions	to  use  to  satisfy  declared
       requirements  in  the Gemfile or in parent gems, it looks up all avail-
       able versions, filters out any versions that don't satisfy the require-
       ment, and then, by default, sorts them from newest to oldest, consider-
       ing them in that order.

       Providing one of the patch level options  (e.g.	--patch)  changes  the
       sort  order of the satisfying versions, causing Bundler to consider the
       latest --patch or --minor version available before other versions. Note
       that versions outside the stated patch level could still be resolved to
       if necessary to find a suitable dependency graph.

       For example, if gem 'foo' is locked at 1.0.2, with no  gem  requirement
       defined	in the Gemfile, and versions 1.0.3, 1.0.4, 1.1.0, 1.1.1, 2.0.0
       all exist, the default order of preference by default (--major) will be
       "2.0.0, 1.1.1, 1.1.0, 1.0.4, 1.0.3, 1.0.2".

       If  the	--patch option is used, the order of preference will change to
       "1.0.4, 1.0.3, 1.0.2, 1.1.1, 1.1.0, 2.0.0".

       If the --minor option is used, the order of preference will  change  to
       "1.1.1, 1.1.0, 1.0.4, 1.0.3, 1.0.2, 2.0.0".

       Combining  the --strict option with any of the patch level options will
       remove any versions beyond the scope of	the  patch  level  option,  to
       ensure that no gem is updated that far.

       To  continue the previous example, if both --patch and --strict options
       are used, the available versions for resolution would be "1.0.4, 1.0.3,
       1.0.2".	If  --minor  and --strict are used, it would be "1.1.1, 1.1.0,
       1.0.4, 1.0.3, 1.0.2".

       Gem requirements as defined in the Gemfile  will  still	be  the  first
       determining factor for what versions are available. If the gem require-
       ment for foo in the Gemfile is '~> 1.0', that will accomplish the  same
       thing as providing the --minor and --strict options.

PATCH LEVEL EXAMPLES
       Given the following gem specifications:



	   foo 1.4.3, requires: ~> bar 2.0
	   foo 1.4.4, requires: ~> bar 2.0
	   foo 1.4.5, requires: ~> bar 2.1
	   foo 1.5.0, requires: ~> bar 2.1
	   foo 1.5.1, requires: ~> bar 3.0
	   bar with versions 2.0.3, 2.0.4, 2.1.0, 2.1.1, 3.0.0



       Gemfile:



	   gem 'foo'



       Gemfile.lock:



	   foo (1.4.3)
	     bar (~> 2.0)
	   bar (2.0.3)



       Cases:



	   #  Command Line		       Result
	   ------------------------------------------------------------
	   1  bundle update --patch	       'foo 1.4.5', 'bar 2.1.1'
	   2  bundle update --patch foo        'foo 1.4.5', 'bar 2.1.1'
	   3  bundle update --minor	       'foo 1.5.1', 'bar 3.0.0'
	   4  bundle update --minor --strict   'foo 1.5.0', 'bar 2.1.1'
	   5  bundle update --patch --strict   'foo 1.4.4', 'bar 2.0.4'



       In  case 1, bar is upgraded to 2.1.1, a minor version increase, because
       the dependency from foo 1.4.5 required it.

       In case 2, only foo is requested  to  be  unlocked,  but  bar  is  also
       allowed to move because it's not a declared dependency in the Gemfile.

       In  case 3, bar goes up a whole major release, because a minor increase
       is preferred now for foo, and when it goes to 1.5.1, it requires  3.0.0
       of bar.

       In case 4, foo is preferred up to a minor version, but 1.5.1 won't work
       because the --strict flag removes bar 3.0.0  from  consideration  since
       it's a major increment.

       In  case 5, both foo and bar have any minor or major increments removed
       from consideration because of the --strict flag, so the most  they  can
       move is up to 1.4.4 and 2.0.4.

RECOMMENDED WORKFLOW
       In  general, when working with an application managed with bundler, you
       should use the following workflow:

       o   After you create your Gemfile(5) for the first time, run

	   $ bundle install

       o   Check the resulting Gemfile.lock into version control

	   $ git add Gemfile.lock

       o   When checking out this repository on another  development  machine,
	   run

	   $ bundle install

       o   When checking out this repository on a deployment machine, run

	   $ bundle install --deployment

       o   After  changing  the  Gemfile(5)  to reflect a new or update depen-
	   dency, run

	   $ bundle install

       o   Make sure to check the updated Gemfile.lock into version control

	   $ git add Gemfile.lock

       o   If bundle install(1) bundle-install.1.html reports a conflict, man-
	   ually update the specific gems that you changed in the Gemfile(5)

	   $ bundle update rails thin

       o   If  you want to update all the gems to the latest possible versions
	   that still match the gems listed in the Gemfile(5), run

	   $ bundle update --all






				 January 2020		      BUNDLE-UPDATE(1)
