Distribute a Rails Generator as a Ruby Gem [duplicate] - ruby-on-rails

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Rails 3 generators in gem
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Closed 8 years ago.
I am fairly new to Ruby/Rails framework. I have a simple generator in my Rails application at lib/generators. The generator's function is to copy one of the files in the templates/myfile.yml directory into config/myfile.yml.
Now I would like to use this generator in another app. So, I would like to package this as a gem. I have generated gem using bundler and it contains the following file structure:
lib/
mygem/
version.rb
generators/
mygem/
install/
templates/
somefile.yml
install_generator.rb
USAGE
mygem.rb
mygem.gemspec
Gemfile
Gemfile.lock
LICENSE.txt
Rakefile
README.md
Content of install_generator is as follows:
require 'rails/generators'
module Mygem
module Generators
class InstallGenerator < Rails::Generators::Base
source_root File.expand_path('../templates', __FILE__)
def generate_something
copy_file "something.yml", "#{Rails.root}/config/something.yml"
end
end
end
end
Following is the content of mygem.gemspec:
# coding: utf-8
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'mygem/version'
Gem::Specification.new do |spec|
spec.name = "mygem"
spec.version = MyGem::VERSION
spec.authors = ["Swaroop SM"]
spec.email = ["myemail#gmail.com"]
spec.description = %q{Something}
spec.summary = %q{Something}
spec.homepage = ""
spec.license = "MIT"
spec.files = `git ls-files`.split($/)
spec.executables = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
spec.test_files = spec.files.grep(%r{^(test|spec|features)/})
spec.require_paths = ["lib"]
spec.add_development_dependency "bundler", "~> 1.3"
spec.add_development_dependency "rake"
end
I reckon there is something missing in my lib/mygem.rb
require "mygem/version"
module Mygem
# Your code goes here...
end
I have no problem in building and pushing it to rubygems.org.
Inorder to use this in one of my rails app's, I added this to the Gemfile and run bundle install. The problem is now when I run rails g mygem:install it throws an error that says:
Could not find generator mygem:install.
What am I doing wrong?

Answer 1

I solved the issue. I had forgotten to add rails as a dependency in my gemspec file. i.e., I had to include the following in mygem.gemspec:
spec.add_development_dependency "rails", "~> RAILS_VERSION"