This time there was not blog post announcement for the 2.1 release, but as always, a detailed list of every change is provided in the changelog.
The main change in bundler 2.1 is that deprecations for upcoming breaking changes in bundler 3 will be turned on by default. We do this to grab feedback and communicate early to our users the kind of changes we’re intending to ship with bundler 3, aimed obviously at making the library better.
If you don’t want to deal with deprecations right now and want to toggle
them off, you can do it through configuration. Set the
BUNDLE_SILENCE_DEPRECATIONS environment variable to
true, or configure it through
bundle config either
bundle config set silence_deprecations true
command, or locally through
bundle config set --local
silence_deprecations true. From now on in this document we will
assume that all three of these configuration options are available, but will
bundle config set <option> <value>.
As a general note, these changes are intended to improve the experience using bundler for new users, who have no existing usage routines nor possibly biased opinions about how the tool should work based on how it has historically worked. We do understand that changing behaviour that have been existing for years can be annoying for old users, that’s why we intend to make this process as smooth as possible for everyone.
I’ll be dividing the deprecations into four groups: CLI deprecations, Helper deprecations, DSL deprecations, and misc deprecations. Let’s dive into each of them.
The CLI defines a set of commands and options that can be used by our users to create command lines that bundler can understand. There’s a number of changes in the upcoming 3 version.
Flags passed to
bundle install that relied on being
remembered across invocations have been deprecated.
In particular, the
--with options to
Remembering CLI options has been a source of historical confusion and bug reports, not only for beginners but also for experienced users. A CLI tool should not behave differently across exactly the same invocations unless explicitly configured to do so. This is what configuration is about after all, and things should never be silently configured without the user knowing about it.
The problem with changing this behavior is that very common
workflows are relying on it. For example, when you run
bundle install --without development:test in
production, those flags are persisted in the app’s configuration
file and further
bundle invocations will happily
ignore development and test gems. This magic will disappear from
bundler 3, and you will explicitly need to configure it, either
through environment variables, application configuration, or
machine configuration. For example, with
bundle config set
without development test.
The removal of this kind of flag also applies to analogous commands,
for example, to
bundle check --path.
--force flag to
bundle install and
bundle update has been renamed to
This is just a simple rename of the flag, to make more apparent what it actually does. This flag forces redownloading every gem, it doesn’t “force” anything else.
bundle viz will be removed and extracted to a plugin.
This is the only bundler command requiring external dependencies,
both an OS dependency (the
graphviz package) and a
gem dependency (the
ruby-graphviz gem). Removing
these dependencies will make development easier and it was also
seen by the bundler team as an opportunity to develop a bundler
plugin that it’s officially maintained by the bundler team, and
that users can take as a reference to develop their own plugins.
The plugin will contain the same code as the old core command, the
only difference being that the command is now implemented as
bundle graph which is much easier to understand.
However, the details of the plugin are under discussion. See
bundle console will be removed and replaced with
Over time we found
bundle console hard to maintain
because every user would want to add her own specific tweaks to
it. In order to ease maintenance and reduce bikeshedding
discussions, we’re removing the
command in favor of a
bin/console script created by
bundle gem on gem generation that users can tweak to
bundle install command will no longer accept a
--binstubs option has been removed from
bundle install and replaced with the
binstubs command. The
--binstubs flag would
create binstubs for all executables present inside the gems in the
project. This was hardly useful since most users will only use a
subset of all the binstubs available to them. Also, it would force
the introduction of a bunch of most likely unused files into
source control. Because of this, binstubs now must be created and
checked into version control individually.
bundle inject command is deprecated and replaced
We believe the new command fits the user’s mental model better and
it supports a wider set of use cases. The interface supported by
bundle inject works exactly the same in
add, so it should be easy to migrate to the new command.
%h4 Helper deprecations
Bundler.clean_exec are deprecated.
All of these helpers ultimately use
under the hood, which makes sure all bundler-related environment
are removed inside the block it yields.
After quite a lot user reports, we noticed that users don’t
usually want this but instead want the bundler environment as it
was before the current process was started. Thus,
Bundler.original_exec were born. They all use the
Bundler.original_env under the hood.
There’s however some specific cases where the good old
Bundler.clean_env behavior can be useful. For
example, when testing Rails generators, you really want an
bundler is out of the picture. This
is why we decided to keep the old behavior under a new more clear
name, because we figured the word “clean” was too ambiguous. So we
Bundler.environment is deprecated in favor of
We’re not sure how people might be using this directly but we have
Bundler::Environment class which was
Bundler.environment since we realized
Bundler::Runtime class was the same thing. During
Bundler.environment will delegate to
Bundler.load, which holds the reference to the
The following deprecations in bundler’s DSL are meant to prepare for the strict source pinning in bundler 3, where the source for every dependency will be unambiguously defined.
Multiple global Gemfile sources will no longer be supported.
Instead of something like this:
# Gemfile source "https://main_source" source "https://another_source" gem "dependency1" gem "dependency2"
do something like this:
# Gemfile source "https://main_source" gem "dependency1" source "https://another_source" do gem "dependency2" end
git sources will no longer be supported.
Instead of something like this:
# Gemfile path "/my/path/with/gems" git "https://my_git_repo_with_gems" gem "dependency1" gem "dependency2"
do something like this:
# Gemfile gem "dependency1", path: "/my/path/with/gems" gem "dependency2", git: "https://my_git_repo_with_gems"
or use the block forms if you have multiple gems for each source and you want to be a bit DRYer:
# Gemfile path "/my/path/with/gems" do # gem "dependency1" # ... # gem "dependencyn" end git "https://my_git_repo_with_gems" do # gem "dependency1" # ... # gem "dependencyn" end
Deployment helpers for
capistrano are being removed.
These are natural deprecations since the
has had no activity for years whereas
has built-in Bundler integration in the form of the
capistrano-bundler gem, and everyone using Capistrano 3 should
be already using that instead. If for some reason, you are still
using Capistrano 2, feel free to copy the Capistrano tasks out of
the Bundler 2 file
lib/bundler/deployment.rb and put
them into your app.
In general, we don’t want to maintain integrations for every deployment system out there, so that’s why we are removing these.