Update just one gem with bundler

Question

I use bundler to manage dependencies in my rails app, and I have a gem hosted in a git repository included as followed:

gem 'gem-name', :git => 'path/to/my/gem.git'

To update this gem, I execute bundle update but it also updates all the gem mentioned in Gemfile. So what is the command to update just one specific gem?

Exanthema

Answer 1

Here you can find a good explanation on the difference between

Update both gem and dependencies:

bundle update gem-name 

or

Update exclusively the gem:

bundle update --source gem-name

along with some nice examples of possible side-effects.

Update

As @Tim's answer says, as of Bundler 1.14 the officially-supported way to this is with bundle update --conservative gem-name.

Pyrrhic

Be careful, "updating gem and dependencies" means updating rails itself if it is a dependency and you probably don't want that. --source will only update the gem specified as parameter. So it is better in most situations. – Spend

how to specify the version? – Bleed

@OshanWisumperuma Specify the version in Gemfile or possibly Gemfile.lock prior to running these bundle commands – Aquacade

Answer 2

The way to do this is to run the following command:

bundle update --source gem-name

Propagable

This is exactly what I needed, I have a private gem and only needs to update the gem itself without updating the dependencies after I made some changes to the private gem. – Malik

Answer 3

It appears that with newer versions of bundler (>= 1.14) it's:

bundle update --conservative gem-name

Grantgranta

note: this command will update one gem without dependencies of it – Pennyroyal

As with the basic non-conservative update, multiple gem names can be specified. This is useful when you want to update a specific subtree of transitive dependencies. – Massorete

Answer 4

You simply need to specify the gem name on the command line:

bundle update gem-name

Billiebilling

Strange. That's what bundle help update says to do. Which version of bundler are you using? – Billiebilling

bundle update gem-name will update the gem and "any of its dependencies". – Suspiration

Answer 5

bundle update gem-name [--major|--patch|--minor]

This also works for dependencies.

Etienne

Is there a way to update it to a specific version? The --major, --minor, and --patch flags automatically upgrade it to the latest possible version. – Mullen

You can specify a specific version in the Gemfile, i.e. 'x.y.z' rather than '~> x.y.z' – Luehrmann

Answer 6

I've used bundle update --source myself for a long time but there are scenarios where it doesn't work. Luckily, there's a gem called bundler-patch which has the goal of fixing this shortcoming.

I also wrote a short blog post about how to use bundler-patch and why bundle update --source doesn't work consistently. Also, be sure to check out a post by chrismo that explains in great detail what the --source option does.

Vendor

Answer 7

bundler update --source gem-name will update the revision hash in Gemfile.lock which you can compare with the last commit hash of that git branch (master by default).

GIT remote: [email protected]:organization/repo-name.git revision: c810f4a29547b60ca8106b7a6b9a9532c392c954

can be found at github.com/organization/repo-name/commits/c810f4a2 (I used shorthand 8 character commit hash for the url)

Psychotechnics

Answer 8

If you want to update a single gem to a specific version:

1. change the version of the gem in the Gemfile
2. bundle update

> ruby -v
ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin19]
> gem -v
3.0.3
> bundle -v
Bundler version 2.1.4

Leannaleanne

Answer 9

If nothing happens with bundle update gem-name it's maybe due to having as a global config do not touch lock files, you can disable this: bundle config set frozen false

Inquietude