如何找出gem的所有依赖项？

Question

我一直试图找出ruby-gem的依赖关系.我知道gem依赖命令会让我知道gem的依赖关系.但我想做的不止于此.我还想知道gem dependency命令生成的那些gem的依赖关系.我的意思是,我想找出所有的宝石,直到最后一颗宝石,我的宝石依赖于宝石.

任何指针将不胜感激.提前致谢.

注意:我们的想法是构建类似https://www.gemlou.pe/的内容

Answer 1

下面的类将递归地获取gem依赖项(请注意它的概念证明,因此它不会做任何花哨的事情,但它是一个很好的起点).有关文档,请参阅rubydocs:Gem :: Dependency和Gem :: Specification

class GemRequirements
  def initialize(name, version = nil)
    @gem = Gem::Dependency.new(name, version)
  end

  def dependency_tree
    @dependency_tree ||= {}.merge(get_dependency(@gem))
  end

  private

  def get_dependency(gem_dependency)
    spec = gem_dependency.matching_specs.first
    dep_key = "#{gem_dependency.name} #{spec.version}"
    hash = { dep_key => {} }
    spec.runtime_dependencies.each do |spec_dependency|
      spec_dependency_spec = spec_dependency.matching_specs.first
      spec_dep_key = "#{spec_dependency.name} #{spec_dependency_spec.version}"
      hash[dep_key][spec_dep_key] = get_dependency(spec_dependency)
    end
    hash
  end
end

您可以在您的应用程序或ruby控制台中以编程方式使用它:

r = GemRequirements.new 'rails'
r.dependency_tree  
=> {"rails 3.2.12"=>
  {"activesupport 3.2.12"=>
    {"activesupport 3.2.12"=>
      {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
       "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
   "actionpack 3.2.12"=>
    {"actionpack 3.2.12"=>
      {"activesupport 3.2.12"=>
        {"activesupport 3.2.12"=>
          {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
           "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
       "activemodel 3.2.12"=>
        {"activemodel 3.2.12"=>
          {"activesupport 3.2.12"=>
            {"activesupport 3.2.12"=>
              {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
               "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
           "builder 3.0.4"=>{"builder 3.0.4"=>{}}}},
       "rack-cache 1.2"=>
        {"rack-cache 1.2"=>{"rack 1.4.5"=>{"rack 1.4.5"=>{}}}},
       "builder 3.0.4"=>{"builder 3.0.4"=>{}},
       "rack 1.4.5"=>{"rack 1.4.5"=>{}},
       "rack-test 0.6.2"=>
        {"rack-test 0.6.2"=>{"rack 1.4.5"=>{"rack 1.4.5"=>{}}}},
       "journey 1.0.4"=>{"journey 1.0.4"=>{}},
       "sprockets 2.2.2"=>
        {"sprockets 2.2.2"=>
          {"hike 1.2.1"=>{"hike 1.2.1"=>{}},
           "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}},
           "rack 1.4.5"=>{"rack 1.4.5"=>{}},
           "tilt 1.4.1"=>{"tilt 1.4.1"=>{}}}},
       "erubis 2.7.0"=>{"erubis 2.7.0"=>{}}}},
   "activerecord 3.2.12"=>
    {"activerecord 3.2.12"=>
      {"activesupport 3.2.12"=>
        {"activesupport 3.2.12"=>
          {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
           "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
       "activemodel 3.2.12"=>
        {"activemodel 3.2.12"=>
          {"activesupport 3.2.12"=>
            {"activesupport 3.2.12"=>
              {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
               "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
           "builder 3.0.4"=>{"builder 3.0.4"=>{}}}},
       "arel 3.0.2"=>{"arel 3.0.2"=>{}},
       "tzinfo 0.3.37"=>{"tzinfo 0.3.37"=>{}}}},
   "activeresource 3.2.12"=>
    {"activeresource 3.2.12"=>
      {"activesupport 3.2.12"=>
        {"activesupport 3.2.12"=>
          {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
           "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
       "activemodel 3.2.12"=>
        {"activemodel 3.2.12"=>
          {"activesupport 3.2.12"=>
            {"activesupport 3.2.12"=>
              {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
               "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
           "builder 3.0.4"=>{"builder 3.0.4"=>{}}}}}},
   "actionmailer 3.2.12"=>
    {"actionmailer 3.2.12"=>
      {"actionpack 3.2.12"=>
        {"actionpack 3.2.12"=>
          {"activesupport 3.2.12"=>
            {"activesupport 3.2.12"=>
              {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
               "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
           "activemodel 3.2.12"=>
            {"activemodel 3.2.12"=>
              {"activesupport 3.2.12"=>
                {"activesupport 3.2.12"=>
                  {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
                   "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
               "builder 3.0.4"=>{"builder 3.0.4"=>{}}}},
           "rack-cache 1.2"=>
            {"rack-cache 1.2"=>{"rack 1.4.5"=>{"rack 1.4.5"=>{}}}},
           "builder 3.0.4"=>{"builder 3.0.4"=>{}},
           "rack 1.4.5"=>{"rack 1.4.5"=>{}},
           "rack-test 0.6.2"=>
            {"rack-test 0.6.2"=>{"rack 1.4.5"=>{"rack 1.4.5"=>{}}}},
           "journey 1.0.4"=>{"journey 1.0.4"=>{}},
           "sprockets 2.2.2"=>
            {"sprockets 2.2.2"=>
              {"hike 1.2.1"=>{"hike 1.2.1"=>{}},
               "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}},
               "rack 1.4.5"=>{"rack 1.4.5"=>{}},
               "tilt 1.4.1"=>{"tilt 1.4.1"=>{}}}},
           "erubis 2.7.0"=>{"erubis 2.7.0"=>{}}}},
       "mail 2.4.4"=>
        {"mail 2.4.4"=>
          {"mime-types 1.21"=>{"mime-types 1.21"=>{}},
           "treetop 1.4.12"=>
            {"treetop 1.4.12"=>{"polyglot 0.3.3"=>{"polyglot 0.3.3"=>{}}}},
           "i18n 0.6.4"=>{"i18n 0.6.4"=>{}}}}}},
   "railties 3.2.12"=>
    {"railties 3.2.12"=>
      {"rake 10.1.0"=>{"rake 10.1.0"=>{}},
       "rack-ssl 1.3.3"=>
        {"rack-ssl 1.3.3"=>{"rack 1.4.5"=>{"rack 1.4.5"=>{}}}},
       "thor 0.18.1"=>{"thor 0.18.1"=>{}},
       "rdoc 3.12.2"=>{"rdoc 3.12.2"=>{"json 1.8.1"=>{"json 1.8.1"=>{}}}},
       "activesupport 3.2.12"=>
        {"activesupport 3.2.12"=>
          {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
           "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
       "actionpack 3.2.12"=>
        {"actionpack 3.2.12"=>
          {"activesupport 3.2.12"=>
            {"activesupport 3.2.12"=>
              {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
               "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
           "activemodel 3.2.12"=>
            {"activemodel 3.2.12"=>
              {"activesupport 3.2.12"=>
                {"activesupport 3.2.12"=>
                  {"i18n 0.6.4"=>{"i18n 0.6.4"=>{}},
                   "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}}}},
               "builder 3.0.4"=>{"builder 3.0.4"=>{}}}},
           "rack-cache 1.2"=>
            {"rack-cache 1.2"=>{"rack 1.4.5"=>{"rack 1.4.5"=>{}}}},
           "builder 3.0.4"=>{"builder 3.0.4"=>{}},
           "rack 1.4.5"=>{"rack 1.4.5"=>{}},
           "rack-test 0.6.2"=>
            {"rack-test 0.6.2"=>{"rack 1.4.5"=>{"rack 1.4.5"=>{}}}},
           "journey 1.0.4"=>{"journey 1.0.4"=>{}},
           "sprockets 2.2.2"=>
            {"sprockets 2.2.2"=>
              {"hike 1.2.1"=>{"hike 1.2.1"=>{}},
               "multi_json 1.8.2"=>{"multi_json 1.8.2"=>{}},
               "rack 1.4.5"=>{"rack 1.4.5"=>{}},
               "tilt 1.4.1"=>{"tilt 1.4.1"=>{}}}},
           "erubis 2.7.0"=>{"erubis 2.7.0"=>{}}}}}},
   "bundler 1.3.5"=>{"bundler 1.3.5"=>{}}}}

Answer 2

$ gem dependency nokogiri -R

例如,会给你一个列表

  Gem nokogiri-1.6.0
  hoe (~> 2.16, development)
  hoe-bundler (>= 1.1, development)
  hoe-debugging (>= 1.0.3, development)
  hoe-gemspec (>= 1.0, development)
  hoe-git (>= 1.4, development)
  mini_portile (~> 0.5.0)
  minitest (~> 2.2.2, development)
  racc (>= 1.4.6, development)
  rake (>= 0.9, development)
  rake-compiler (~> 0.8.0, development)
  rdoc (~> 3.10, development)
  rexical (>= 1.0.5, development)
  Used by
    haml-4.0.3 (nokogiri (>= 0, development))
    mime-types-1.23 (nokogiri (~> 1.5, development))
    redcarpet-2.3.0 (nokogiri (>= 0, development))
    tilt-1.4.1 (nokogiri (>= 0, development))

在输出中包含反向依赖项

有关http://guides.rubygems.org/command-reference/#gem_dependency的更多信息$ gem dependency

更新

根据我在网上做过的研究,在向同事和其他人询问这个主题后,我得出结论,目前没有办法可以$ gem dependency找出完整的宝石依赖关系的递归列表.

编写类似于您在更新的问题中指出的宝石的宝石不应该非常复杂.我相信人们可以通过编写一个简单的递归循环并获取宝石信息(也许是理想的格式)来做到这一点.

我想,我死了这条关于这个问题,但有人可能会开始为别人(不是我)谁能够想到的赏金"获得递归宝石的最佳途径依赖关系"比其他https://www.gemlou.pe这我觉得很好.