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Edit File : compact_index_client.rb \| Size : 3.27 KB
# frozen_string_literal: true require "pathname" require "set" module Bundler class CompactIndexClient DEBUG_MUTEX = Mutex.new def self.debug return unless ENV["DEBUG_COMPACT_INDEX"] DEBUG_MUTEX.synchronize { warn("[#{self}] #{yield}") } end class Error < StandardError; end require "bundler/compact_index_client/cache" require "bundler/compact_index_client/updater" attr_reader :directory # @return [Lambda] A lambda that takes an array of inputs and a block, and # maps the inputs with the block in parallel. # attr_accessor :in_parallel def initialize(directory, fetcher) @directory = Pathname.new(directory) @updater = Updater.new(fetcher) @cache = Cache.new(@directory) @endpoints = Set.new @info_checksums_by_name = {} @parsed_checksums = false @mutex = Mutex.new @in_parallel = lambda do \|inputs, &blk\| inputs.map(&blk) end end def names Bundler::CompactIndexClient.debug { "/names" } update(@cache.names_path, "names") @cache.names end def versions Bundler::CompactIndexClient.debug { "/versions" } update(@cache.versions_path, "versions") versions, @info_checksums_by_name = @cache.versions versions end def dependencies(names) Bundler::CompactIndexClient.debug { "dependencies(#{names})" } in_parallel.call(names) do \|name\| update_info(name) @cache.dependencies(name).map {\|d\| d.unshift(name) } end.flatten(1) end def spec(name, version, platform = nil) Bundler::CompactIndexClient.debug { "spec(name = #{name}, version = #{version}, platform = #{platform})" } update_info(name) @cache.specific_dependency(name, version, platform) end def update_and_parse_checksums! Bundler::CompactIndexClient.debug { "update_and_parse_checksums!" } return @info_checksums_by_name if @parsed_checksums update(@cache.versions_path, "versions") @info_checksums_by_name = @cache.checksums @parsed_checksums = true end private def update(local_path, remote_path) Bundler::CompactIndexClient.debug { "update(#{local_path}, #{remote_path})" } unless synchronize { @endpoints.add?(remote_path) } Bundler::CompactIndexClient.debug { "already fetched #{remote_path}" } return end @updater.update(local_path, url(remote_path)) end def update_info(name) Bundler::CompactIndexClient.debug { "update_info(#{name})" } path = @cache.info_path(name) checksum = @updater.checksum_for_file(path) unless existing = @info_checksums_by_name[name] Bundler::CompactIndexClient.debug { "skipping updating info for #{name} since it is missing from versions" } return end if checksum == existing Bundler::CompactIndexClient.debug { "skipping updating info for #{name} since the versions checksum matches the local checksum" } return end Bundler::CompactIndexClient.debug { "updating info for #{name} since the versions checksum #{existing} != the local checksum #{checksum}" } update(path, "info/#{name}") end def url(path) path end def synchronize @mutex.synchronize { yield } end end end Back

Edit File : compact_index_client.rb | Size : 3.27 KB

# frozen_string_literal: true

require "pathname"
require "set"

module Bundler
  class CompactIndexClient
    DEBUG_MUTEX = Mutex.new
    def self.debug
      return unless ENV["DEBUG_COMPACT_INDEX"]
      DEBUG_MUTEX.synchronize { warn("[#{self}] #{yield}") }
    end

class Error < StandardError; end

require "bundler/compact_index_client/cache"
    require "bundler/compact_index_client/updater"

attr_reader :directory

# @return [Lambda] A lambda that takes an array of inputs and a block, and
    #         maps the inputs with the block in parallel.
    #
    attr_accessor :in_parallel

def initialize(directory, fetcher)
      @directory = Pathname.new(directory)
      @updater = Updater.new(fetcher)
      @cache = Cache.new(@directory)
      @endpoints = Set.new
      @info_checksums_by_name = {}
      @parsed_checksums = false
      @mutex = Mutex.new
      @in_parallel = lambda do |inputs, &blk|
        inputs.map(&blk)
      end
    end

def names
      Bundler::CompactIndexClient.debug { "/names" }
      update(@cache.names_path, "names")
      @cache.names
    end

def versions
      Bundler::CompactIndexClient.debug { "/versions" }
      update(@cache.versions_path, "versions")
      versions, @info_checksums_by_name = @cache.versions
      versions
    end

def dependencies(names)
      Bundler::CompactIndexClient.debug { "dependencies(#{names})" }
      in_parallel.call(names) do |name|
        update_info(name)
        @cache.dependencies(name).map {|d| d.unshift(name) }
      end.flatten(1)
    end

def spec(name, version, platform = nil)
      Bundler::CompactIndexClient.debug { "spec(name = #{name}, version = #{version}, platform = #{platform})" }
      update_info(name)
      @cache.specific_dependency(name, version, platform)
    end

def update_and_parse_checksums!
      Bundler::CompactIndexClient.debug { "update_and_parse_checksums!" }
      return @info_checksums_by_name if @parsed_checksums
      update(@cache.versions_path, "versions")
      @info_checksums_by_name = @cache.checksums
      @parsed_checksums = true
    end

private

def update(local_path, remote_path)
      Bundler::CompactIndexClient.debug { "update(#{local_path}, #{remote_path})" }
      unless synchronize { @endpoints.add?(remote_path) }
        Bundler::CompactIndexClient.debug { "already fetched #{remote_path}" }
        return
      end
      @updater.update(local_path, url(remote_path))
    end

def update_info(name)
      Bundler::CompactIndexClient.debug { "update_info(#{name})" }
      path = @cache.info_path(name)
      checksum = @updater.checksum_for_file(path)
      unless existing = @info_checksums_by_name[name]
        Bundler::CompactIndexClient.debug { "skipping updating info for #{name} since it is missing from versions" }
        return
      end
      if checksum == existing
        Bundler::CompactIndexClient.debug { "skipping updating info for #{name} since the versions checksum matches the local checksum" }
        return
      end
      Bundler::CompactIndexClient.debug { "updating info for #{name} since the versions checksum #{existing} != the local checksum #{checksum}" }
      update(path, "info/#{name}")
    end

def url(path)
      path
    end

def synchronize
      @mutex.synchronize { yield }
    end
  end
end

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