module Buildr::ArtifactSearch

# File lib/buildr/packaging/artifact_search.rb, line 33
def best_version(spec, *methods)
  spec = Artifact.to_hash(spec)
  spec[:version] = requirement = VersionRequirement.create(spec[:version])
  select = lambda do |candidates|
    candidates.find { |candidate| requirement.satisfied_by?(candidate) }
  end
  result = nil
  methods = search_methods if methods.empty?
  if requirement.composed?
    until result || methods.empty?
      method = methods.shift
      type = method.keys.first
      from = method[type]
      if (include.empty? || !(include & [:all, type, from]).empty?) &&
          (exclude & [:all, type, from]).empty?
        if from.respond_to?(:call)
          versions = from.call(spec.dup)
        else
          versions = send("#{type}_versions", spec.dup, *from)
        end
        result = select[versions]
      end
    end
  end
  result ||= requirement.default
  raise "Could not find #{Artifact.to_spec(spec)}"  +
    "\n You may need to use an specific version instead of a requirement" unless result
  spec.merge :version => result
end

# File lib/buildr/packaging/artifact_search.rb, line 28
def exclude(method = nil)
  (@excludes ||= []).tap { push method if method }
end

# File lib/buildr/packaging/artifact_search.rb, line 24
def include(method = nil)
  (@includes ||= []).tap { push method if method }
end

# File lib/buildr/packaging/artifact_search.rb, line 63
def requirement?(spec)
  VersionRequirement.requirement?(spec[:version])
end