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Update the gems specified all gems, if --all flag is usedignoring the previously installed gems specified in the Gemfile. In general, you should use bundle install 1 to install the same exact gems and versions across machines.

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. The name of a :git or :path source used in the Gemfile 5.

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Do not allow any gem to be updated past latest --patch --minor --major. Use bundle install conservative update behavior and do not allow shared dependencies to be updated.

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

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

bundle update one gem only

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 Gemfile 5. To do this, run bundle update --allwhich will ignore the Gemfile. 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.

Sometimes, you want to update a single gem in the Gemfile 5and leave the rest of the gems that you specified locked to the versions in the Gemfile. For instance, in the scenario above, imagine that nokogiri releases version 1. To do this, run bundle update nokogiri. Bundler will update nokogiri and any of its dependencies, but leave alone Rails and its dependencies. Sometimes, multiple gems declared in your Gemfile 5 are satisfied by the same second-level dependency.

bundle update one gem only

For instance, consider the case of thin and rack-perftools-profiler. If you run bundle install, you get:. In this case, the two gems have their own set of dependencies, but they share rack in common. If you run bundle update thinbundler will update daemonseventmachine and rackwhich are dependencies of thinbut not open4 or perftools.

In short, by default, when you update a gem using bundle updatebundler 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. In this scenario, updating the thin version manually in the Gemfile 5and then running bundle install 1 will only update daemons and eventmachinebut not rack. Starting with 1. Version 1.And running bundle update rails caused the Rails version to go not from 3. The text was updated successfully, but these errors were encountered:. It is somewhat understandable that a straight bundle update could actually downgrade gems.

For instance, if you're dependent on a gem which has reduced their dependencies when posting a newer version i. However, speaking to tylerhunt 's issue, a bundle update rails should only update rails and it's immediate dependencies, which should not have forced a downgrade as he reports. That is completely unexpected and confusing.

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Changing gem 'rails', '3. Is this a bundler issue or an issue with the RubyGems. Bundler definitely doesn't guarantee that update will give you newer versions of gems. If you care about getting a specific version of any gem, you need to request that version in your Gemfile.

For example, if you actually want Rails 3. Let me know if you have any questions, and thanks! I think that was the point of the issue. Not that it installs "wrong" versions, but that it unexpectedly downgrades.

But again, that outcome seems counter to what one would expect from an "update" call. If the Gemfile.

Rails Bundle Install and Gemfile

Because of the way the resolver works, updating one gem can me a working resolve downgrades another gem. There was a great example of this recently where updating the Twitter gem added new dependencies that conflicted with another gem's dependencies, so the older version of Twitter that didn't conflict was picked.

If you don't, bundle update might might choose to update a different gem at the expense of rails, instead of the other way around.

Reply to this email directly or view it on GitHub: comment. Skip to content.

How to update a single gem conservatively

This repository has been archived by the owner. It is now read-only. Bundle Update Downgrading Gem Version Copy link.

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With the following specified in the Gemfile : gem 'rails', '3. Then, removing the version number: gem 'rails' And running bundle update rails caused the Rails version to go not from 3. Saw the same thing with chef today. I had: gem 'chef' bundle update took me from 0. I was able to verify this issue using bundler 1. Sign up for free to subscribe to this conversation on GitHub. Already have an account?

Sign in. Linked pull requests. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window.Bundler makes sure that Ruby applications always use the exact gems and versions that you need while keeping a consistent environment and gem dependencies satisfied. This is done by ensuring that the gems you need are present in the development, staging and the production. With this three simple steps that every begginer should know to get your application up and running with bundler :.

Before you start, you will need to install Ruby on Rails on your machine. Once the installation is finished run bundle installthis will create Gemfile. This ensures that other developers on your Ruby application run the same third-party code on every machine.

There are multiple options you can use to change the way bundle install works. We will cover the most commonly used ones. A Gemfile is a file we created which is used for describing gem dependencies for Ruby programs.

The Gemfile is located in the root of the project directory. There is no need for more than one source per project. Bundler first looks if a source location is set up for the gem. If nothing has been explicitly set, it will look at the sources you have defined, starting at the first one.

If the application requires a specific Ruby version or engine we can set this in the Gemfile in the following way: ruby '2. You can improve the default syntax in the following way:. You can prevent bundler from requiring the gem with require: falsebut it will still install and maintain the gem. When installing gems using git, you can set either a branch, tag, or ref for the gem. The default branch is branch: 'master'.

Another gem source can be :gistit is used if the project is hosted on Github as a gist. You can specify certain groups to not bundle install, this can considerably speed up the installation time. When developers use different Operating Systems during development, they will need different versions of gems depending on what is supported by their system.

Hope this text helped you to gain a better understanding of gems and bundle install. Thank you for reading! Type in your email and receive updates on development, design and startups directly in your inbox.

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I use bundler to manage dependencies in my rails app, and I have a gem hosted in a git repository included as followed:. 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?

bundle update one gem only

Here you can find a good explanation on the difference between. As Tim's answer says, as of Bundler 1. 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. GIT remote: git github. Learn more. Update just one gem with bundler Ask Question. Asked 8 years, 6 months ago. Active 4 months ago. Viewed k times.

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Andrew Marshall Active Oldest Votes. 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. Andy Waite 9, 4 4 gold badges 26 26 silver badges 46 46 bronze badges. Be careful, "updating gem and dependencies" means updating rails itself if it is a dependency and you probably don't want that.

So it is better in most situations. OshanWisumperuma Specify the version in Gemfile or possibly Gemfile. The way to do this is to run the following command: bundle update --source gem-name. 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.

Tim Tim 2, 2 2 gold badges 15 15 silver badges 9 9 bronze badges. You simply need to specify the gem name on the command line: bundle update gem-name. Brandan Brandan That's what bundle help update says to do.

Which version of bundler are you using? Linus Linus 3, 7 7 gold badges 42 42 silver badges 67 67 bronze badges. Is there a way to update it to a specific version? The --major--minorand --patch flags automatically upgrade it to the latest possible version. Kitto Kitto 1, 8 8 silver badges 16 16 bronze badges. Sign up or log in Sign up using Google.Join Stack Overflow to learn, share knowledge, and build your career.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have a private git server hosting a gem we developed. The gem got some commits, but the version did not actually change. It is critical for bundler to be able to read the version number from your gem, which was introduced in the.

It's confusing not only to bundler or gem updatebut also confusing to people if you forget to update the version number in the. They would end up having gem-files lying around, and not be able to tell which versions they are, e. First of all, don't do that. If you change your gem, you should be updating its version number. Otherwise, it's just confusing. If you really want to do this, however, you can apply the giant hammer of removing your gem first.

From version 1. This doesn't answer the exact question above, but I was searching for "How to force update a gem in bundler" on Google and this came up.

I'm not trying to force update a gem to rubygems. Specifically I'm trying reinstall a gem with a native extension nokogiri. Note: You'll of course need to change 2.

Learn more. How to force the update of a gem with bundler? Ask Question. Asked 9 years, 3 months ago.

bundle update one gem only

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How can I force bundler to update my gem even if the version hasn't changed? I tried "bundler update mygemname" but it did not update anything. Improve this question.

Dominic Goulet Dominic Goulet 7, 7 7 gold badges 23 23 silver badges 54 54 bronze badges. Active Oldest Votes. The best thing to do is to correct the mistake in the. Check the bundler source code for available options: e. Improve this answer. Tilo Tilo Thanks for the answer. I know it's better to increase gem version, but it implies that you have to change the host application to reference the new version of the gem. Or maybe I can simply put gem "mygemname" in the gemfile so it will always fetch the latest version.

You can always run bundle update to update to the latest version of your gem! Which version of Rails do you use? There is a --force option see this answer and it works.

Ian it looks like the --force option is a new addition to the 'gem' command.But it actually updates cucumber-rails and all of its dependencies. This will explode in your face when one of these dependencies release a new version with breaking API changes. Which is all the time. In the example above updating cucumber-rails will give you Capybara 2. However no one seems to know how and why this works, it's not a documented feature of Bundler. It might be an unintended side effect of something else.

If this leads to unmatched dependencies to to other locked gems, it will fail. If you use this option, be sure to git diff your Gemfile. Our laser focus on a single technology has made us a leader in this space. If you found our advice to be useful, you might like our book about maintainable Rails applications:.

All source code included in the card How to update a single gem conservatively is licensed under the license stated below. This includes both code snippets embedded in the card text and code that is included as a file attachment. Excepted from this license are code snippets that are explicitely marked as citations from another source. Sign up. Learn more. Owner of this card: Henning Koch. Say thanks. Your thanks were sent to!

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License for source code All source code included in the card How to update a single gem conservatively is licensed under the license stated below. Privacy policy Terms of service Imprint. This website uses short-lived cookies to improve usability. Accept or learn more.I'd rather not update my rails version just because I'm also updating a minor gem that has rails as a dependency.

In any case, a --conservative or something would be greatly appreciated. This is a repost of The text was updated successfully, but these errors were encountered:. Rails the gem does not conform to Semantic Versioning, and therefore the best practice is to explicitly state which version of Rails your application is compatible with in your Gemfile. In the case of gems other than Rails, we strongly recommend that you update a gem's dependencies when you update that gem, which is why the update command functions the way it does.

If you need to update just one gem to a specific version, that is when you should edit your Gemfile and then run bundle install which will re-resolve your Gemfile in the most conservative mode. Thanks for the suggestion, and I hope that the explanation of locking Rails via a version in the Gemfile addresses your issue. I think this is a reasonable feature request by marcandre This would simply be a time-saving bit of sugar, to be able to conservatively update a particular gem, without having to edit the Gemfile, bundle install, then undo the edits to the Gemfile.

Or worse, result in devs fiddling with their Gemfile. Regardless of whether this is rails, or any other gem. Use case: My company's internal gem works with any version of rails, and any version of many other gems it depends on. But when my team updates to the latest version of my internal company specific, private gem, they don't always want to change any other code in related gems, but just get my internal gem updates.

Thanks for listening! I say reputedly because I am unable to get it to work for the xpath gem but this problem may be specific to that gem. My understanding is that --source is simply for specifying the source URL or local filesystem location where any needed gems can be found.

For anyone who runs into this, updating in my Gemfile in my case from a branch to merged master and bundle install worked great for a conservative upgrade. I'll just put in another plug for adding a '--conservative' option for bundler when updating single gems. Anytime you have users having to edit a file, re-run a command, then revert changes to the edits, seems like a slam dunk for a nice convenient command line option. Anyway, that's imo of course. So help me understand exactly what you want, then, I guess?

You want to be able to run bundle update --only foo or something like that, and update to the newest version of foo that doesn't require changing the version of any other gem in your Bundle? You want to be able to run bundle update --only foo and update to the newest version of foo that doesn't require changing the version of any other gem in your Bundle?

No, not quite. It has to update to the latest fooeven if that requires changing other versions. Problem is, currently, bundler changes versions it doesn't have to. Update foo to the latest available version, and update other gems only if required. In particular, if the requirements of foo haven't changed, then only foo would be updated.

Other way to say this: equivalent of bundle installbut as if the Gemfile had been modified with gem 'foo', 'the. I'd like a single command line call that will change the Gemfile.