How to create a new Ruby gem?

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bundler create gem
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To create a new Ruby gem, should I use Jeweler or should I use Bundler's built-in gem skeleton to create a base gem? What are the differences that matter?

Use Bundler

From the command line:

bundle gem your_new_gem

This will create a directory called your_new_gem with just a basic set of files and directory structure that are now considered best-practice. It's quick, easy, and a great place to start.

How to create a Ruby gem with Bundler, Creating a Gem From Scratch. Create the basic file structure of the gem: Fire up your shell and create the directories that will be needed in your gem: $ mkdir awesome_gem $ cd awesome_gem $ mkdir lib. Create the gemspec. Add some code. Generate the gem file. Install the gem. Add The Gem to Another Ruby Program. Today, I’m going to show you how you can create and publish your very own Ruby gem. We’re going to build a gem that generates a random greeting text along with the User’s name (E.g

Creating a Gem isn't that difficult and I would advise to try building a gem from scratch, without any tools. After you know what's involved (creating a gemspec, building and pushing it to, you can use tools to speed up the process. My guess is you won't because making a gem is hardly the trouble at all.

Creating Your First Gem, To create a new Gem application, follow the steps below: Run RubyMine and click Create New Project on the Welcome Screen. Welcome screen. In  If you’re using an earlier Ruby than 1.9.2, you need to start the session with irb -rubygems or require the rubygems library after you launch irb. Now you can share hola with the rest of the Ruby community. Publishing your gem out to only takes one command, provided that you have an account on the site.

I would go with Jeweler. The Bundler skeleton is only going to give you the basics. Jeweler has alot more options to work with and many helpful rake tasks for versioning, pushing to github, creating the gemspec, building and installing.

If you are working with Rails 3 engines, I have a Jeweler fork (definitely a work-in-progress) that will generate the app skelaton and include the engine file. You just have to run the jeweler command with --rails3-engine as an option. Here is the fork if you are interested:

Create and publish your first Ruby gem - Help, email — Your contact email. # ./ do |s| ### REQUIRED ### = '  Then, it will be available to the other rubyists all over the world through This is done by; $ gem push new_test_gem-0.0.1.gem To check it, your gem is added in $ gem list -r new_test_gem The End That’s all it takes to create a gem! If you want to create a Ruby Gem,

Here's an alternative that's worth looking at: ore

Bundler gives you a single template for ruby gems, whereas ore has multiple built in templates, plus the ability to create your own. It also supports Git, SVN (urgh) and Mercurial.

Create a Simple Ruby Gem - The Startup, With our new gem installed on the local machine, we can start testing. The next step is to start irb and see if the gem is working. irb > require 'nat20' => true How to create a gem in Ruby on Rails? [From Scratch] Being web developers, we all love Ruby on Rails. And we have our own reasons.But, one of the reasons why we love Ruby onRails (RoR) is the simplicity, which eases the way we code.

I would recommend using the built-in bundler command.

bundle gem your_gem_name

There are some rules that you should follow when creating a gem. Such as naming conventions and versioning rules. I recently wrote a post on creating gems in netguru's blog. I think you'll find what you need in there.

Hope this helps.

How To Make A Ruby Gem - Codezillas, Last post I discussed why I found ruby gems interesting, and the steps required in order to Go to and create a new repository. Ruby was my very first language and the one that got me into this programming world. For this ent I’ve been writing and focusing on Python lately and I’ve been wanting to make more content about Ruby.

How to Create a Ruby Gem, code that we can extract into a “collection” which we can call later. One of the simplest functionalities, which most RoR developers love is, creating gems in Ruby. What are gems in Ruby? A gem in Ruby programming language is a software package in which Ruby applications or libraries can be distributed in a single format.

How to Create and Publish Your Own Ruby Gem From Scratch, Tagged with ruby, gem, bundle. It is sort of like running rails new command to create a RoR application. $ bundle gem spell_generator. The build task will build the current version of the gem and store it under the pkg folder, the install task will build and install the gem to our system (just like it would do if we gem install‘d it) and release will push the gem to Rubygems for consumption by the public.

What is a Gemfile, STEP 1: Bootstrap your gem. Your new gem can be bootstrapped using following bundler command: $ bundle gem final_redirect_url. Executing this command will​  Creating a Gem From Scratch 1. Create the basic file structure of the gem: You need a root directory for your gem 2. Create the gemspec. We will use the template from the previous section for our gemspec file. 3. Add some code. To keep things simple, we will use only one Ruby file in this

  • possible duplicate of Ruby : How to write a gem?
  • this may help you…
  • @AndrewMarshall Not a duplicate, this asks about how to create a skeleton of a ruby gem allowing more specific answers.
  • helpful link…
  • Good point. It is better to understand how to do it from scratch before you use a generator. This will make it alot easier to debug any problems that arise if you decide to use Jeweler. I do think that Jeweler makes it alot easier to create a gem and it forces you to do things like creating a description, versioning, etc.. why would you create it from scratch (after you do it once to learn it), when you can use a Jeweler and speed the process? Waste of time in my opinion, and less prone to errors.
  • sorry I'm late: What jeweler creates isn't easier, it just moves the stuff to the Rakefile. A gemspec is only about 10 lines. I like the stuff bundler generates though. Sensible and minimal.
  • Learning to write a gem from scratch instead of using a generator is like writing a web framework from scratch without using rails new. I see your point about creating one from scratch, but for someone new to creating gems (or anything for that matter), sometimes it's easier to learn by example. When you see what the generator builds, you can learn what each piece does and why it is important to the structure. Once you understand how it works, then you can write one from scratch.
  • In that case, I would go for the generator provided by bundler gem.
  • Jeweler is no longer kept up-to-date as much as Bundler, as the author confesses that most people now use Bundler instead:
  • I agree. I no longer use jeweler. It is probably better to start from scratch your first time, so you understand how the gemspec works.
  • It is a duplicate of (top answer), with spammy link as the only addition.