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require 'rubygems'
require 'rubygems/dependency'
require 'rubygems/dependency_resolver'
require 'rubygems/dependency_list'
require 'rubygems/installer'
require 'tsort'
module Gem
class RequestSet
include TSort
##
# Array of gems to install even if already installed
attr_reader :always_install
# Treat missing dependencies as silent errors
attr_accessor :soft_missing
attr_reader :dependencies
attr_accessor :development
def initialize(*deps)
@dependencies = deps
@always_install = []
@development = false
@soft_missing = false
yield self if block_given?
end
# Declare that a gem of name +name+ with +reqs+ requirements
# is needed.
#
def gem(name, *reqs)
@dependencies << Gem::Dependency.new(name, reqs)
end
# Add +deps+ Gem::Depedency objects to the set.
#
def import(deps)
@dependencies += deps
end
# Resolve the requested dependencies and return an Array of
# Specification objects to be activated.
#
def resolve set = nil
resolver = Gem::DependencyResolver.new @dependencies, set
resolver.development = @development
resolver.soft_missing = @soft_missing
@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 DependencyResolver::CurrentSet.new
end
# Load a dependency management file.
#
def load_gemdeps(path)
gf = GemDepedencyAPI.new(self, path)
gf.load
end
def specs
@specs ||= @requests.map { |r| r.full_spec }
end
def tsort_each_node(&block)
@requests.each(&block)
end
def tsort_each_child(node)
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 depedency found during sorting - #{dep}"
end
end
end
end
def sorted_requests
@sorted ||= strongly_connected_components.flatten
end
def specs_in(dir)
Dir["#{dir}/specifications/*.gemspec"].map do |g|
Gem::Specification.load g
end
end
def install_into dir, force = true, options = {}
existing = force ? [] : specs_in(dir)
existing.delete_if { |s| @always_install.include? s }
dir = File.expand_path dir
installed = []
sorted_requests.each do |req|
if existing.find { |s| s.full_name == req.spec.full_name }
yield req, nil if block_given?
next
end
path = req.download(dir)
unless path then # already installed
yield req, nil if block_given?
next
end
options[:install_dir] = dir
options[:only_install_dir] = true
inst = Gem::Installer.new path, options
yield req, inst if block_given?
inst.install
installed << req
end
installed
end
def install options, &block
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? and
@always_install.none? { |spec| spec == req.spec.spec } then
yield req, nil if block_given?
next
end
path = req.download cache_dir
inst = Gem::Installer.new path, options
yield req, inst if block_given?
specs << inst.install
end
specs
end
end
end
require 'rubygems/request_set/gem_dependency_api'
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