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Edit File : request_set.rb \| Size : 11.25 KB
# frozen_string_literal: true require_relative 'tsort' ## # A RequestSet groups a request to activate a set of dependencies. # # nokogiri = Gem::Dependency.new 'nokogiri', '~> 1.6' # pg = Gem::Dependency.new 'pg', '~> 0.14' # # set = Gem::RequestSet.new nokogiri, pg # # requests = set.resolve # # p requests.map { \|r\| r.full_name } # #=> ["nokogiri-1.6.0", "mini_portile-0.5.1", "pg-0.17.0"] class Gem::RequestSet include Gem::TSort ## # Array of gems to install even if already installed attr_accessor :always_install attr_reader :dependencies attr_accessor :development ## # Errors fetching gems during resolution. attr_reader :errors ## # Set to true if you want to install only direct development dependencies. attr_accessor :development_shallow ## # The set of git gems imported via load_gemdeps. attr_reader :git_set # :nodoc: ## # When true, dependency resolution is not performed, only the requested gems # are installed. attr_accessor :ignore_dependencies attr_reader :install_dir # :nodoc: ## # If true, allow dependencies to match prerelease gems. attr_accessor :prerelease ## # When false no remote sets are used for resolving gems. attr_accessor :remote attr_reader :resolver # :nodoc: ## # Sets used for resolution attr_reader :sets # :nodoc: ## # Treat missing dependencies as silent errors attr_accessor :soft_missing ## # The set of vendor gems imported via load_gemdeps. attr_reader :vendor_set # :nodoc: ## # The set of source gems imported via load_gemdeps. attr_reader :source_set ## # Creates a RequestSet for a list of Gem::Dependency objects, +deps+. You # can then #resolve and #install the resolved list of dependencies. # # nokogiri = Gem::Dependency.new 'nokogiri', '~> 1.6' # pg = Gem::Dependency.new 'pg', '~> 0.14' # # set = Gem::RequestSet.new nokogiri, pg def initialize(deps) @dependencies = deps @always_install = [] @conservative = false @dependency_names = {} @development = false @development_shallow = false @errors = [] @git_set = nil @ignore_dependencies = false @install_dir = Gem.dir @prerelease = false @remote = true @requests = [] @sets = [] @soft_missing = false @sorted = nil @specs = nil @vendor_set = nil @source_set = nil yield self if block_given? end ## # Declare that a gem of name +name+ with +reqs+ requirements is needed. def gem(name, reqs) if dep = @dependency_names[name] dep.requirement.concat reqs else dep = Gem::Dependency.new name, reqs @dependency_names[name] = dep @dependencies << dep end end ## # Add +deps+ Gem::Dependency objects to the set. def import(deps) @dependencies.concat deps end ## # Installs gems for this RequestSet using the Gem::Installer +options+. # # If a +block+ is given an activation +request+ and +installer+ are yielded. # The +installer+ will be +nil+ if a gem matching the request was already # installed. def install(options, &block) # :yields: request, installer if dir = options[:install_dir] requests = install_into dir, false, options, &block return requests end @prerelease = options[:prerelease] requests = [] download_queue = Thread::Queue.new # Create a thread-safe list of gems to download sorted_requests.each do \|req\| download_queue << req end # Create N threads in a pool, have them download all the gems threads = Gem.configuration.concurrent_downloads.times.map do # When a thread pops this item, it knows to stop running. The symbol # is queued here so that there will be one symbol per thread. download_queue << :stop Thread.new do # The pop method will block waiting for items, so the only way # to stop a thread from running is to provide a final item that # means the thread should stop. while req = download_queue.pop break if req == :stop req.spec.download options unless req.installed? end end end # Wait for all the downloads to finish before continuing threads.each(&:value) # Install requested gems after they have been downloaded sorted_requests.each do \|req\| if req.installed? req.spec.spec.build_extensions if @always_install.none? {\|spec\| spec == req.spec.spec } yield req, nil if block_given? next end end spec = begin req.spec.install options do \|installer\| yield req, installer if block_given? end rescue Gem::RuntimeRequirementNotMetError => e suggestion = "There are no versions of #{req.request} compatible with your Ruby & RubyGems" suggestion += ". Maybe try installing an older version of the gem you're looking for?" unless @always_install.include?(req.spec.spec) e.suggestion = suggestion raise end requests << spec end return requests if options[:gemdeps] install_hooks requests, options requests end ## # Installs from the gem dependencies files in the +:gemdeps+ option in # +options+, yielding to the +block+ as in #install. # # If +:without_groups+ is given in the +options+, those groups in the gem # dependencies file are not used. See Gem::Installer for other +options+. def install_from_gemdeps(options, &block) gemdeps = options[:gemdeps] @install_dir = options[:install_dir] \|\| Gem.dir @prerelease = options[:prerelease] @remote = options[:domain] != :local @conservative = true if options[:conservative] gem_deps_api = load_gemdeps gemdeps, options[:without_groups], true resolve if options[:explain] puts "Gems to install:" sorted_requests.each do \|spec\| puts " #{spec.full_name}" end if Gem.configuration.really_verbose @resolver.stats.display end else installed = install options, &block if options.fetch :lock, true lockfile = Gem::RequestSet::Lockfile.build self, gemdeps, gem_deps_api.dependencies lockfile.write end installed end end def install_into(dir, force = true, options = {}) gem_home, ENV['GEM_HOME'] = ENV['GEM_HOME'], dir existing = force ? [] : specs_in(dir) existing.delete_if {\|s\| @always_install.include? s } dir = File.expand_path dir installed = [] options[:development] = false options[:install_dir] = dir options[:only_install_dir] = true @prerelease = options[:prerelease] sorted_requests.each do \|request\| spec = request.spec if existing.find {\|s\| s.full_name == spec.full_name } yield request, nil if block_given? next end spec.install options do \|installer\| yield request, installer if block_given? end installed << request end install_hooks installed, options installed ensure ENV['GEM_HOME'] = gem_home end ## # Call hooks on installed gems def install_hooks(requests, options) specs = requests.map do \|request\| case request when Gem::Resolver::ActivationRequest then request.spec.spec else request end end require_relative "dependency_installer" inst = Gem::DependencyInstaller.new options inst.installed_gems.replace specs Gem.done_installing_hooks.each do \|hook\| hook.call inst, specs end unless Gem.done_installing_hooks.empty? end ## # Load a dependency management file. def load_gemdeps(path, without_groups = [], installing = false) @git_set = Gem::Resolver::GitSet.new @vendor_set = Gem::Resolver::VendorSet.new @source_set = Gem::Resolver::SourceSet.new @git_set.root_dir = @install_dir lock_file = "#{File.expand_path(path)}.lock".dup.tap(&Gem::UNTAINT) begin tokenizer = Gem::RequestSet::Lockfile::Tokenizer.from_file lock_file parser = tokenizer.make_parser self, [] parser.parse rescue Errno::ENOENT end gf = Gem::RequestSet::GemDependencyAPI.new self, path gf.installing = installing gf.without_groups = without_groups if without_groups gf.load end def pretty_print(q) # :nodoc: q.group 2, '[RequestSet:', ']' do q.breakable if @remote q.text 'remote' q.breakable end if @prerelease q.text 'prerelease' q.breakable end if @development_shallow q.text 'shallow development' q.breakable elsif @development q.text 'development' q.breakable end if @soft_missing q.text 'soft missing' end q.group 2, '[dependencies:', ']' do q.breakable @dependencies.map do \|dep\| q.text dep.to_s q.breakable end end q.breakable q.text 'sets:' q.breakable q.pp @sets.map {\|set\| set.class } end end ## # Resolve the requested dependencies and return an Array of Specification # objects to be activated. def resolve(set = Gem::Resolver::BestSet.new) @sets << set @sets << @git_set @sets << @vendor_set @sets << @source_set set = Gem::Resolver.compose_sets(@sets) set.remote = @remote set.prerelease = @prerelease resolver = Gem::Resolver.new @dependencies, set resolver.development = @development resolver.development_shallow = @development_shallow resolver.ignore_dependencies = @ignore_dependencies resolver.soft_missing = @soft_missing if @conservative installed_gems = {} Gem::Specification.find_all do \|spec\| (installed_gems[spec.name] \|\|= []) << spec end resolver.skip_gems = installed_gems end @resolver = resolver @requests = resolver.resolve @errors = set.errors @requests end ## # Resolve the requested dependencies against the gems available via Gem.path # and return an Array of Specification objects to be activated. def resolve_current resolve Gem::Resolver::CurrentSet.new end def sorted_requests @sorted \|\|= strongly_connected_components.flatten end def specs @specs \|\|= @requests.map {\|r\| r.full_spec } end def specs_in(dir) Gem::Util.glob_files_in_dir("*.gemspec", File.join(dir, "specifications")).map do \|g\| Gem::Specification.load g end end def tsort_each_node(&block) # :nodoc: @requests.each(&block) end def tsort_each_child(node) # :nodoc: node.spec.dependencies.each do \|dep\| next if dep.type == :development and not @development match = @requests.find do \|r\| dep.match? r.spec.name, r.spec.version, @prerelease end unless match next if dep.type == :development and @development_shallow next if @soft_missing raise Gem::DependencyError, "Unresolved dependency found during sorting - #{dep} (requested by #{node.spec.full_name})" end yield match end end end require_relative 'request_set/gem_dependency_api' require_relative 'request_set/lockfile' require_relative 'request_set/lockfile/tokenizer' Back

Edit File : request_set.rb | Size : 11.25 KB

# frozen_string_literal: true
require_relative 'tsort'

##
# A RequestSet groups a request to activate a set of dependencies.
#
#   nokogiri = Gem::Dependency.new 'nokogiri', '~> 1.6'
#   pg = Gem::Dependency.new 'pg', '~> 0.14'
#
#   set = Gem::RequestSet.new nokogiri, pg
#
#   requests = set.resolve
#
#   p requests.map { |r| r.full_name }
#   #=> ["nokogiri-1.6.0", "mini_portile-0.5.1", "pg-0.17.0"]

class Gem::RequestSet
  include Gem::TSort

##
  # Array of gems to install even if already installed

attr_accessor :always_install

attr_reader :dependencies

attr_accessor :development

##
  # Errors fetching gems during resolution.

attr_reader :errors

##
  # Set to true if you want to install only direct development dependencies.

attr_accessor :development_shallow

##
  # The set of git gems imported via load_gemdeps.

attr_reader :git_set # :nodoc:

##
  # When true, dependency resolution is not performed, only the requested gems
  # are installed.

attr_accessor :ignore_dependencies

attr_reader :install_dir # :nodoc:

##
  # If true, allow dependencies to match prerelease gems.

attr_accessor :prerelease

##
  # When false no remote sets are used for resolving gems.

attr_accessor :remote

attr_reader :resolver # :nodoc:

##
  # Sets used for resolution

attr_reader :sets # :nodoc:

##
  # Treat missing dependencies as silent errors

attr_accessor :soft_missing

##
  # The set of vendor gems imported via load_gemdeps.

attr_reader :vendor_set # :nodoc:

##
  # The set of source gems imported via load_gemdeps.

attr_reader :source_set

##
  # Creates a RequestSet for a list of Gem::Dependency objects, +deps+.  You
  # can then #resolve and #install the resolved list of dependencies.
  #
  #   nokogiri = Gem::Dependency.new 'nokogiri', '~> 1.6'
  #   pg = Gem::Dependency.new 'pg', '~> 0.14'
  #
  #   set = Gem::RequestSet.new nokogiri, pg

def initialize(*deps)
    @dependencies = deps

@always_install      = []
    @conservative        = false
    @dependency_names    = {}
    @development         = false
    @development_shallow = false
    @errors              = []
    @git_set             = nil
    @ignore_dependencies = false
    @install_dir         = Gem.dir
    @prerelease          = false
    @remote              = true
    @requests            = []
    @sets                = []
    @soft_missing        = false
    @sorted              = nil
    @specs               = nil
    @vendor_set          = nil
    @source_set          = nil

yield self if block_given?
  end

##
  # Declare that a gem of name +name+ with +reqs+ requirements is needed.

def gem(name, *reqs)
    if dep = @dependency_names[name]
      dep.requirement.concat reqs
    else
      dep = Gem::Dependency.new name, *reqs
      @dependency_names[name] = dep
      @dependencies << dep
    end
  end

##
  # Add +deps+ Gem::Dependency objects to the set.

def import(deps)
    @dependencies.concat deps
  end

##
  # Installs gems for this RequestSet using the Gem::Installer +options+.
  #
  # If a +block+ is given an activation +request+ and +installer+ are yielded.
  # The +installer+ will be +nil+ if a gem matching the request was already
  # installed.

def install(options, &block) # :yields: request, installer
    if dir = options[:install_dir]
      requests = install_into dir, false, options, &block
      return requests
    end

@prerelease = options[:prerelease]

requests = []
    download_queue = Thread::Queue.new

# Create a thread-safe list of gems to download
    sorted_requests.each do |req|
      download_queue << req
    end

# Create N threads in a pool, have them download all the gems
    threads = Gem.configuration.concurrent_downloads.times.map do
      # When a thread pops this item, it knows to stop running. The symbol
      # is queued here so that there will be one symbol per thread.
      download_queue << :stop

Thread.new do
        # The pop method will block waiting for items, so the only way
        # to stop a thread from running is to provide a final item that
        # means the thread should stop.
        while req = download_queue.pop
          break if req == :stop
          req.spec.download options unless req.installed?
        end
      end
    end

# Wait for all the downloads to finish before continuing
    threads.each(&:value)

# Install requested gems after they have been downloaded
    sorted_requests.each do |req|
      if req.installed?
        req.spec.spec.build_extensions

if @always_install.none? {|spec| spec == req.spec.spec }
          yield req, nil if block_given?
          next
        end
      end

spec =
        begin
          req.spec.install options do |installer|
            yield req, installer if block_given?
          end
        rescue Gem::RuntimeRequirementNotMetError => e
          suggestion = "There are no versions of #{req.request} compatible with your Ruby & RubyGems"
          suggestion += ". Maybe try installing an older version of the gem you're looking for?" unless @always_install.include?(req.spec.spec)
          e.suggestion = suggestion
          raise
        end

requests << spec
    end

return requests if options[:gemdeps]

install_hooks requests, options

requests
  end

##
  # Installs from the gem dependencies files in the +:gemdeps+ option in
  # +options+, yielding to the +block+ as in #install.
  #
  # If +:without_groups+ is given in the +options+, those groups in the gem
  # dependencies file are not used.  See Gem::Installer for other +options+.

def install_from_gemdeps(options, &block)
    gemdeps = options[:gemdeps]

@install_dir = options[:install_dir] || Gem.dir
    @prerelease  = options[:prerelease]
    @remote      = options[:domain] != :local
    @conservative = true if options[:conservative]

gem_deps_api = load_gemdeps gemdeps, options[:without_groups], true

resolve

if options[:explain]
      puts "Gems to install:"

sorted_requests.each do |spec|
        puts "  #{spec.full_name}"
      end

if Gem.configuration.really_verbose
        @resolver.stats.display
      end
    else
      installed = install options, &block

if options.fetch :lock, true
        lockfile =
          Gem::RequestSet::Lockfile.build self, gemdeps, gem_deps_api.dependencies
        lockfile.write
      end

installed
    end
  end

def install_into(dir, force = true, options = {})
    gem_home, ENV['GEM_HOME'] = ENV['GEM_HOME'], dir

existing = force ? [] : specs_in(dir)
    existing.delete_if {|s| @always_install.include? s }

dir = File.expand_path dir

installed = []

options[:development] = false
    options[:install_dir] = dir
    options[:only_install_dir] = true
    @prerelease = options[:prerelease]

sorted_requests.each do |request|
      spec = request.spec

if existing.find {|s| s.full_name == spec.full_name }
        yield request, nil if block_given?
        next
      end

spec.install options do |installer|
        yield request, installer if block_given?
      end

installed << request
    end

install_hooks installed, options

installed
  ensure
    ENV['GEM_HOME'] = gem_home
  end

##
  # Call hooks on installed gems

def install_hooks(requests, options)
    specs = requests.map do |request|
      case request
      when Gem::Resolver::ActivationRequest then
        request.spec.spec
      else
        request
      end
    end

require_relative "dependency_installer"
    inst = Gem::DependencyInstaller.new options
    inst.installed_gems.replace specs

Gem.done_installing_hooks.each do |hook|
      hook.call inst, specs
    end unless Gem.done_installing_hooks.empty?
  end

##
  # Load a dependency management file.

def load_gemdeps(path, without_groups = [], installing = false)
    @git_set    = Gem::Resolver::GitSet.new
    @vendor_set = Gem::Resolver::VendorSet.new
    @source_set = Gem::Resolver::SourceSet.new

@git_set.root_dir = @install_dir

lock_file = "#{File.expand_path(path)}.lock".dup.tap(&Gem::UNTAINT)
    begin
      tokenizer = Gem::RequestSet::Lockfile::Tokenizer.from_file lock_file
      parser = tokenizer.make_parser self, []
      parser.parse
    rescue Errno::ENOENT
    end

gf = Gem::RequestSet::GemDependencyAPI.new self, path
    gf.installing = installing
    gf.without_groups = without_groups if without_groups
    gf.load
  end

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

if @remote
        q.text 'remote'
        q.breakable
      end

if @prerelease
        q.text 'prerelease'
        q.breakable
      end

if @development_shallow
        q.text 'shallow development'
        q.breakable
      elsif @development
        q.text 'development'
        q.breakable
      end

if @soft_missing
        q.text 'soft missing'
      end

q.group 2, '[dependencies:', ']' do
        q.breakable
        @dependencies.map do |dep|
          q.text dep.to_s
          q.breakable
        end
      end

q.breakable
      q.text 'sets:'

q.breakable
      q.pp @sets.map {|set| set.class }
    end
  end

##
  # Resolve the requested dependencies and return an Array of Specification
  # objects to be activated.

def resolve(set = Gem::Resolver::BestSet.new)
    @sets << set
    @sets << @git_set
    @sets << @vendor_set
    @sets << @source_set

set = Gem::Resolver.compose_sets(*@sets)
    set.remote = @remote
    set.prerelease = @prerelease

resolver = Gem::Resolver.new @dependencies, set
    resolver.development         = @development
    resolver.development_shallow = @development_shallow
    resolver.ignore_dependencies = @ignore_dependencies
    resolver.soft_missing        = @soft_missing

if @conservative
      installed_gems = {}
      Gem::Specification.find_all do |spec|
        (installed_gems[spec.name] ||= []) << spec
      end
      resolver.skip_gems = installed_gems
    end

@resolver = resolver

@requests = resolver.resolve

@errors = set.errors

@requests
  end

##
  # Resolve the requested dependencies against the gems available via Gem.path
  # and return an Array of Specification objects to be activated.

def resolve_current
    resolve Gem::Resolver::CurrentSet.new
  end

def sorted_requests
    @sorted ||= strongly_connected_components.flatten
  end

def specs
    @specs ||= @requests.map {|r| r.full_spec }
  end

def specs_in(dir)
    Gem::Util.glob_files_in_dir("*.gemspec", File.join(dir, "specifications")).map do |g|
      Gem::Specification.load g
    end
  end

def tsort_each_node(&block) # :nodoc:
    @requests.each(&block)
  end

def tsort_each_child(node) # :nodoc:
    node.spec.dependencies.each do |dep|
      next if dep.type == :development and not @development

match = @requests.find do |r|
        dep.match? r.spec.name, r.spec.version, @prerelease
      end

unless match
        next if dep.type == :development and @development_shallow
        next if @soft_missing
        raise Gem::DependencyError,
              "Unresolved dependency found during sorting - #{dep} (requested by #{node.spec.full_name})"
      end

yield match
    end
  end
end

require_relative 'request_set/gem_dependency_api'
require_relative 'request_set/lockfile'
require_relative 'request_set/lockfile/tokenizer'

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