Rubyonrails 链轮轨道V4链接到外部Ruby 的 list 文件

铁轨::铁道

设置:

bin/rails plugin new my_gem

# my_gem/lib/my_gem/railtie.rb

module MyGem
  class Railtie < ::铁轨::铁道
    def root
      @root ||= Pathname.new(__dir__).parent.parent
    end

    initializer :my_gem_assets do |app|
      # This is to be able to require your styles from main app application.css
      # like this:
      #
      #   /* =require my_gem/application.css */
      #
      app.config.assets.paths << root.join("app/assets/stylesheets")

      # This is to be able to directly link your styles from your templates:
      #
      #   <%= stylesheet_link_tag "my_gem/application.css" %>
      #
      # this path is relative to any `app.config.assets.paths`
      app.config.assets.precompile << "my_gem/application.css"
    end
  end
end

如果您要使用MANIFEST:

# my_gem/lib/my_gem/railtie.rb

module MyGem
  class Railtie < ::铁轨::铁道
    def root
      @root ||= Pathname.new(__dir__).parent.parent
    end

    initializer :my_gem_assets do |app|
      app.config.assets.paths << root.join("app/assets/stylesheets")
      app.config.assets.paths << root.join("app/assets/config") # <-----------------------.
      app.config.assets.precompile << "my_gem_manifest.js"      # relative to asset path -'
    end
  end
end

// my_gem/app/assets/config/my_gem_manifest.js

//= link my_gem/application.css

100

Rails::Engine

设置:

bin/rails plugin new my_engine --mountable

与铁路公司不同的是，Engine为你处理了很多事情:

# my_engine/lib/my_engine/engine.rb

module MyEngine
  class Engine < ::Rails::Engine
    isolate_namespace MyEngine

    initializer :my_engine_assets do |app|
      # This is automatically done by Rails::Engine
      # app.config.assets.paths << root.join("app/assets/stylesheets")
      # so you can just require files without extra config
      #
      #   /* =require my_engine/application.css */

      # If you want to link directly:
      #
      #   <%= stylesheet_link_tag "my_engine/application.css" %>
      #
      # add that file to be precompiled
      # app.config.assets.precompile << "my_engine/application.css"
      #
      # or use manifest
      # ('app/assets/config' is automatically added to assets paths)
      app.config.assets.precompile << "my_engine_manifest.js"
    end
  end
end

// my_engine/app/assets/config/my_engine_manifest.js

//= link_directory ../stylesheets/my_engine .css

主应用程序

现在，您可以从主应用程序使用您的gem/Engine资源:

# app/views/layouts/application.html.erb

# we can do this because these files are in
# Rails.application.config.assets.paths and
# Rails.application.config.assets.precompile
<%= stylesheet_link_tag "my_gem/application.css" %>
<%= stylesheet_link_tag "my_engine/application.css" %>

或者，您可以要求主应用程序application.css中的文件:

/* app/assets/stylesheets/application.css */

/* in this case you don't have to precompile them
 * =require my_gem/application.css
 * =require my_engine/application.css
 */