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



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

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

DESCRIPTION
       Update  the  gems specified (all gems, if none are specified), ignoring
       the previously installed gems specified in the  Gemfile.lock.  In  gen-
       eral, you should use [bundle install(1)][bundle-install] to install the
       same exact gems and versions across machines.

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

OPTIONS
       --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.

       --force
	      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 with no parameters, 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]  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], bundler skips the dependency reso-
       lution 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] 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, which will ignore the Gemfile.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.

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)][bundle-install]:

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

       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] reports a conflict, manually
	   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






				   July 2017		      BUNDLE-UPDATE(1)
