Current File : //opt/alt/ruby21/lib64/ruby/2.1.0/rubygems/request_set.rb
require 'rubygems'
require '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 TSort
##
# Array of gems to install even if already installed
attr_reader :always_install
attr_reader :dependencies
attr_accessor :development
##
# 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
##
# When false no remote sets are used for resolving gems.
attr_accessor :remote
##
# 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:
##
# 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 = []
@dependency_names = {}
@development = false
@git_set = nil
@ignore_dependencies = false
@install_dir = Gem.dir
@remote = true
@requests = []
@sets = []
@soft_missing = false
@sorted = nil
@specs = nil
@vendor_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] then
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]
return install_into dir, false, options, &block
end
cache_dir = options[:cache_dir] || Gem.dir
specs = []
sorted_requests.each do |req|
if req.installed? then
req.spec.spec.build_extensions
if @always_install.none? { |spec| spec == req.spec.spec } then
yield req, nil if block_given?
next
end
end
path = req.download cache_dir
inst = Gem::Installer.new path, options
yield req, inst if block_given?
specs << inst.install
end
specs
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
@remote = options[:domain] != :local
load_gemdeps gemdeps, options[:without_groups]
resolve
if options[:explain]
puts "Gems to install:"
specs.map { |s| s.full_name }.sort.each do |s|
puts " #{s}"
end
if Gem.configuration.really_verbose
@resolver.stats.display
end
else
installed = install options, &block
lockfile = Gem::RequestSet::Lockfile.new self, gemdeps
lockfile.write
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[:install_dir] = dir
options[:only_install_dir] = true
sorted_requests.each do |request|
spec = request.spec
if existing.find { |s| s.full_name == spec.full_name } then
yield request, nil if block_given?
next
end
spec.install options do |installer|
yield request, installer if block_given?
end
installed << request
end
installed
ensure
ENV['GEM_HOME'] = gem_home
end
##
# Load a dependency management file.
def load_gemdeps path, without_groups = []
@git_set = Gem::Resolver::GitSet.new
@vendor_set = Gem::Resolver::VendorSet.new
@git_set.root_dir = @install_dir
lockfile = Gem::RequestSet::Lockfile.new self, path
lockfile.parse
gf = Gem::RequestSet::GemDependencyAPI.new self, path
gf.without_groups = without_groups if without_groups
gf.load
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
set = Gem::Resolver.compose_sets(*@sets)
set.remote = @remote
resolver = Gem::Resolver.new @dependencies, set
resolver.development = @development
resolver.ignore_dependencies = @ignore_dependencies
resolver.soft_missing = @soft_missing
@resolver = resolver
@requests = resolver.resolve
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
Dir["#{dir}/specifications/*.gemspec"].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 { |r| dep.match? r.spec.name, r.spec.version }
if match
begin
yield match
rescue TSort::Cyclic
end
else
unless @soft_missing
raise Gem::DependencyError, "Unresolved dependency found during sorting - #{dep} (requested by #{node.spec.full_name})"
end
end
end
end
end
require 'rubygems/request_set/gem_dependency_api'
require 'rubygems/request_set/lockfile'
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