how to build a ruby gem

1. first you will creata a user in rubygem.org (https://rubygems.org/) 

2. create the directory structure like this:

Java代码  

1. $ tree    
2. .    
3. ├── cc_hola.gemspec    
4. └── lib    
5.     └── cc_hola.rb    

   you can use any name but you must keep consistency

3. in your .gemspec file

Java代码  

1. Gem::Specification.new do |s|  
2.   s.name        = ‘CcHola‘  
3.   s.version     = ‘0.0.0‘  
4.   s.date        = ‘2014-10-20‘  
5.   s.summary     = "A ruby gem build test!"  
6.   s.description = "A ruby gem build test!"  
7.   s.authors     = ["cckkll"]  
8.   s.email       = ‘237178842@qq.com‘  
9.   s.files       = ["lib/cc_hola.rb"]  
10.   s.homepage    = ‘https://github.com/chengyuanheng‘  
11. end  

4. in your .rb file

Java代码  

1. class CcHola  
2.   def self.hi  
3.     puts "Hello World!"  
4.   end  
5. end  

5. compiled gem

Java代码  

1. $ gem build cc_hola.gemspec  
2. Successfully built RubyGem  
3. Name: CcHola  
4. Version: 0.0.0  
5. File: CcHola-0.0.0.gem  
6.   
7. $ gem install ccHola-0.0.0.gem  
8. Successfully installed CcHola-0.0.0  
9. <span>1 gem installed</span>   

 6. test your gem

Java代码  

1. $ irb  
2. > require "cc_hola"  
3. => true  
4. > CcHola.hi  
5. Hello World!  
6. => nil  

7. release your gem

Java代码  

1. $ curl -u cckkll https://rubygems.org/api/v1/api_key.yaml >~/.gem/credentials  
2. Enter host password for user ‘cckkll‘:  
3.   
4. $ gem push CcHola-0.0.0.gem   
5. Pushing gem to https://rubygems.org...  
6. Successfully registered gem: CcHola (0.0.0)  

   you will find it in your rubygems account and all people can use it by

Java代码  

1. gem ‘CcHola‘, ‘~> 0.0.0‘