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# frozen_string_literal: true
##
# The global rubygems pool, available via the rubygems.org API.
# Returns instances of APISpecification.
class Gem::Resolver::APISet < Gem::Resolver::Set
autoload :GemParser, File.expand_path("api_set/gem_parser", __dir__)
##
# The URI for the dependency API this APISet uses.
attr_reader :dep_uri # :nodoc:
##
# The Gem::Source that gems are fetched from
attr_reader :source
##
# The corresponding place to fetch gems.
attr_reader :uri
##
# Creates a new APISet that will retrieve gems from +uri+ using the RubyGems
# API URL +dep_uri+ which is described at
# https://guides.rubygems.org/rubygems-org-api
def initialize(dep_uri = 'https://index.rubygems.org/info/')
super()
dep_uri = URI dep_uri unless URI === dep_uri
@dep_uri = dep_uri
@uri = dep_uri + '..'
@data = Hash.new {|h,k| h[k] = [] }
@source = Gem::Source.new @uri
@to_fetch = []
end
##
# Return an array of APISpecification objects matching
# DependencyRequest +req+.
def find_all(req)
res = []
return res unless @remote
if @to_fetch.include?(req.name)
prefetch_now
end
versions(req.name).each do |ver|
if req.dependency.match? req.name, ver[:number], @prerelease
res << Gem::Resolver::APISpecification.new(self, ver)
end
end
res
end
##
# A hint run by the resolver to allow the Set to fetch
# data for DependencyRequests +reqs+.
def prefetch(reqs)
return unless @remote
names = reqs.map {|r| r.dependency.name }
needed = names - @data.keys - @to_fetch
@to_fetch += needed
end
def prefetch_now # :nodoc:
needed, @to_fetch = @to_fetch, []
needed.sort.each do |name|
versions(name)
end
end
def pretty_print(q) # :nodoc:
q.group 2, '[APISet', ']' do
q.breakable
q.text "URI: #{@dep_uri}"
q.breakable
q.text 'gem names:'
q.pp @data.keys
end
end
##
# Return data for all versions of the gem +name+.
def versions(name) # :nodoc:
if @data.key?(name)
return @data[name]
end
uri = @dep_uri + name
str = Gem::RemoteFetcher.fetcher.fetch_path uri
lines(str).each do |ver|
number, platform, dependencies, requirements = parse_gem(ver)
platform ||= "ruby"
dependencies = dependencies.map {|dep_name, reqs| [dep_name, reqs.join(", ")] }
requirements = requirements.map {|req_name, reqs| [req_name.to_sym, reqs] }.to_h
@data[name] << { name: name, number: number, platform: platform, dependencies: dependencies, requirements: requirements }
end
@data[name]
end
private
def lines(str)
lines = str.split("\n")
header = lines.index("---")
header ? lines[header + 1..-1] : lines
end
def parse_gem(string)
@gem_parser ||= GemParser.new
@gem_parser.parse(string)
end
end
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