Class: Gem::Resolver::Conflict

Inherits:
Object
  • Object
show all
Defined in:
lib/rubygems/resolver/conflict.rb

Overview

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dependency, activated, failed_dep = dependency) ⇒ Conflict

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



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# File 'lib/rubygems/resolver/conflict.rb', line 23

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

Instance Attribute Details

#activated ⇒ Object (readonly)

The specification that was activated prior to the conflict



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# File 'lib/rubygems/resolver/conflict.rb', line 10

def activated
  @activated
end

#dependency ⇒ Object (readonly)

The dependency that is in conflict with the activated gem.



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# File 'lib/rubygems/resolver/conflict.rb', line 15

def dependency
  @dependency
end

#failed_dep ⇒ Object (readonly)

:nodoc:



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# File 'lib/rubygems/resolver/conflict.rb', line 17

def failed_dep
  @failed_dep
end

Instance Method Details

#==(other) ⇒ Object

:nodoc:



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# File 'lib/rubygems/resolver/conflict.rb', line 29

def ==(other) # :nodoc:
  self.class === other and
    @dependency == other.dependency and
    @activated  == other.activated  and
    @failed_dep == other.failed_dep
end

#conflicting_dependencies ⇒ Object

Return the 2 dependency objects that conflicted



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# File 'lib/rubygems/resolver/conflict.rb', line 46

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

#explain ⇒ Object

A string explanation of the conflict.



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# File 'lib/rubygems/resolver/conflict.rb', line 39

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

#explanation ⇒ Object

Explanation of the conflict used by exceptions to print useful messages



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# File 'lib/rubygems/resolver/conflict.rb', line 53

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?
    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.

Returns:

  • (Boolean) 


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# File 'lib/rubygems/resolver/conflict.rb', line 95

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

#pretty_print(q) ⇒ Object

:nodoc:



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# File 'lib/rubygems/resolver/conflict.rb', line 99

def pretty_print(q) # :nodoc:
  q.group 2, '[Dependency conflict: ', ']' do
    q.breakable

    q.text 'activated '
    q.pp @activated

    q.breakable
    q.text ' dependency '
    q.pp @dependency

    q.breakable
    if @dependency == @failed_dep
      q.text ' failed'
    else
      q.text ' failed dependency '
      q.pp @failed_dep
    end
  end
end

#request_path(current) ⇒ Object

Path of activations from the current list.



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# File 'lib/rubygems/resolver/conflict.rb', line 123

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 ⇒ Object

Return the Specification that listed the dependency



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# File 'lib/rubygems/resolver/conflict.rb', line 150

def requester
  @failed_dep.requester
end