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Class: Gem::Resolver::Conflict

Relationships & Source Files
Inherits: Object
Defined in: lib/rubygems/resolver/conflict.rb

Overview

Used internally to indicate that a dependency conflicted with a spec that would be activated.

Class Method Summary

Instance Attribute Summary

  • #activated readonly

    The specification that was activated prior to the conflict.

  • #dependency readonly

    The dependency that is in conflict with the activated gem.

Instance Method Summary

Constructor Details

.new(dependency, activated, failed_dep = dependency) ⇒ Conflict

Creates a new resolver conflict when #dependency is in conflict with an already #activated specification.

[ GitHub ] 

  


# File 'lib/rubygems/resolver/conflict.rb', line 24



def initialize(dependency, activated, failed_dep=dependency)
  @dependency = dependency
  @activated = activated
  @failed_dep = failed_dep
end


  







Instance Attribute Details



  

    #activated   (readonly)
  



  

    

The specification that was activated prior to the conflict


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/conflict.rb', line 11



attr_reader :activated


  








  

    #dependency   (readonly)
  



  

    

The dependency that is in conflict with the activated gem.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/conflict.rb', line 16



attr_reader :dependency


  







Instance Method Details



  

    #conflicting_dependencies  
  



  

    

Return the 2 dependency objects that conflicted


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/conflict.rb', line 47



def conflicting_dependencies
  [@failed_dep.dependency, @activated.request.dependency]
end


  








  

    #explain  
  



  

    

A string explanation of the conflict.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/conflict.rb', line 40



def explain
  "<Conflict wanted: #{@failed_dep}, had: #{activated.spec.full_name}>"
end


  








  

    #explanation  
  



  

    

Explanation of the conflict used by exceptions to print useful messages


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/conflict.rb', line 54



def explanation
  activated   = @activated.spec.full_name
  dependency  = @failed_dep.dependency
  requirement = dependency.requirement
  alternates  = dependency.matching_specs.map { |spec| spec.full_name }

  unless alternates.empty? then
    matching = <<-MATCHING.chomp

Gems matching %s:
  %s
    MATCHING

    matching = matching % [
      dependency,
      alternates.join(', '),
    ]
  end

  explanation = <<-EXPLANATION
Activated %s
which does not match conflicting dependency (%s)

Conflicting dependency chains:
  %s

versus:
  %s
%s
  EXPLANATION

  explanation % [
    activated, requirement,
    request_path(@activated).reverse.join(", depends on\n    "),
    request_path(@failed_dep).reverse.join(", depends on\n    "),
    matching,
  ]
end


  








  

    #for_spec?(spec)  ⇒ Boolean 
  



  

    

Returns true if the conflicting dependency's name matches spec.


  





  


  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/conflict.rb', line 96



def for_spec?(spec)
  @dependency.name == spec.name
end


  








  

    #request_path(current)  
  



  

    

Path of activations from the current list.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/conflict.rb', line 124



def request_path current
  path = []

  while current do
    case current
    when Gem::Resolver::ActivationRequest then
      path <<
        "#{current.request.dependency}, #{current.spec.version} activated"

      current = current.parent
    when Gem::Resolver::DependencyRequest then
      path << "#{current.dependency}"

      current = current.requester
    else
      raise Gem::Exception, "[BUG] unknown request class #{current.class}"
    end
  end

  path = ['user request (gem command or Gemfile)'] if path.empty?

  path
end


  








  

    #requester  
  



  

    

Return the Specification that listed the dependency


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/conflict.rb', line 151



def requester
  @failed_dep.requester
end