# frozen_string_literal: true
##
# The BestSet chooses the best available method to query a remote index.
#
# It combines IndexSet and APISet
class Gem::Resolver::BestSet < Gem::Resolver::ComposedSet
##
# Creates a BestSet for the given +sources+ or Gem::sources if none are
# specified. +sources+ must be a Gem::SourceList.
def initialize(sources = Gem.sources)
super()
@sources = sources
end
##
# Picks which sets to use for the configured sources.
def pick_sets # :nodoc:
@sources.each_source do |source|
@sets << source.dependency_resolver_set
end
end
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
def prefetch(reqs) # :nodoc:
pick_sets if @remote and @sets.empty?
super
end
def pretty_print(q) # :nodoc:
q.group 2, '[BestSet', ']' do
q.breakable
q.text 'sets:'
q.breakable
q.pp @sets
end
end
##
# 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.
def replace_failed_api_set(error) # :nodoc:
uri = error.uri
uri = URI uri unless URI === uri
uri.query = nil
raise error unless api_set = @sets.find { |set|
Gem::Resolver::APISet === set and set.dep_uri == uri
}
index_set = Gem::Resolver::IndexSet.new api_set.source
@sets.map! do |set|
next set unless set == api_set
index_set
end
end
end
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