Class: Gem::Resolver::BestSet

Inherits:
ComposedSet show all
Defined in:
lib/rubygems/resolver/best_set.rb

Overview

The BestSet chooses the best available method to query a remote index.

It combines IndexSet and APISet

Instance Attribute Summary

Attributes inherited from ComposedSet

#sets

Attributes inherited from Set

#errors, #prerelease, #remote

Instance Method Summary collapse

Methods inherited from ComposedSet

#errors, #prerelease=, #remote=

Methods inherited from Set

#remote?

Constructor Details

#initialize(sources = Gem.sources) ⇒ BestSet

Creates a BestSet for the given sources or Gem::sources if none are specified. sources must be a Gem::SourceList.



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# File 'lib/rubygems/resolver/best_set.rb', line 12

def initialize(sources = Gem.sources)
  super()

  @sources = sources
end

Instance Method Details

#find_all(req) ⇒ Object

:nodoc:



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# File 'lib/rubygems/resolver/best_set.rb', line 27

def find_all(req) # :nodoc:
  pick_sets if @remote and @sets.empty?

  super
rescue Gem::RemoteFetcher::FetchError => e
  replace_failed_api_set e

  retry
end

#pick_sets ⇒ Object

Picks which sets to use for the configured sources.



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# File 'lib/rubygems/resolver/best_set.rb', line 21

def pick_sets # :nodoc:
  @sources.each_source do |source|
    @sets << source.dependency_resolver_set
  end
end

#prefetch(reqs) ⇒ Object

:nodoc:



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# File 'lib/rubygems/resolver/best_set.rb', line 37

def prefetch(reqs) # :nodoc:
  pick_sets if @remote and @sets.empty?

  super
end

#pretty_print(q) ⇒ Object

:nodoc:



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# File 'lib/rubygems/resolver/best_set.rb', line 43

def pretty_print(q) # :nodoc:
  q.group 2, '[BestSet', ']' do
    q.breakable
    q.text 'sets:'

    q.breakable
    q.pp @sets
  end
end

#replace_failed_api_set(error) ⇒ Object

Replaces a failed APISet for the URI in error with an IndexSet.

If no matching APISet can be found the original error is raised.

The calling method must retry the exception to repeat the lookup.



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# File 'lib/rubygems/resolver/best_set.rb', line 60

def replace_failed_api_set(error) # :nodoc:
  uri = error.original_uri
  uri = URI uri unless URI === uri
  uri = uri + "."

  raise error unless api_set = @sets.find do |set|
    Gem::Resolver::APISet === set and set.dep_uri == uri
  end

  index_set = Gem::Resolver::IndexSet.new api_set.source

  @sets.map! do |set|
    next set unless set == api_set
    index_set
  end
end