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  • 怎样新建和加载一个Ruby Gem

    1 新建一个gem:
    > bundle gem my_mongoid
          create  my_mongoid/Gemfile
          create  my_mongoid/Rakefile
          create  my_mongoid/LICENSE.txt
          create  my_mongoid/README.md
          create  my_mongoid/.gitignore
          create  my_mongoid/my_mongoid.gemspec
          create  my_mongoid/lib/my_mongoid.rb
          create  my_mongoid/lib/my_mongoid/version.rb

    新建gem所依赖的gem文件放在my_mongoid.gemspec文件里.
    这个gem版本号以字符串常量的形式放在lib/my_mongoid/version.rb里.
    module MyMonoid
      VERSION = "0.2.1"
    end

    2 使用rake管理Gem:
    > rake -T
    rake build    # Build my_monoid-0.2.1.gem into the pkg directory
    rake install  # Build and install my_monoid-0.2.1.gem into system gems
    rake release  # Create tag v0.2.1 and build and push my_monoid-0.2.1.gem to...

    3 使用rake build构建gem:
    > rake build
    rake aborted!
    ERROR:  While executing gem ... (Gem::InvalidSpecificationException)
        "FIXME" or "TODO" is not a description

    Tasks: TOP => build
    (See full trace by running task with --trace)

    需要把my_monoidmy_monoid.gemspec里的
      spec.description   = %q{TODO: Write a gem description}
      spec.summary       = %q{TODO: Write a gem summary}
    改为
      spec.description   = %q{Write a gem description}
      spec.summary       = %q{Write a gem summary}

    此时可以build成功:
    > rake build
    my_monoid 0.2.1 built to pkg/my_monoid-0.2.1.gem.

    4 安装gem:
    > gem install pkg/my_monoid-0.2.1.gem --local
    Successfully installed my_monoid-0.2.1
    Parsing documentation for my_monoid-0.2.1
    Installing ri documentation for my_monoid-0.2.1
    Done installing documentation for my_monoid after 1 seconds
    1 gem installed

    5 查看安装路径:
    > gem which my_monoid
    D:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/my_monoid-0.2.1/lib/my_mono
    id.rb

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  • 原文地址:https://www.cnblogs.com/leaf526/p/3600245.html
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