183 lines
3.7 KiB
Ruby
183 lines
3.7 KiB
Ruby
require 'rubygems'
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require 'rubygems/dependency'
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require 'rubygems/dependency_resolver'
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require 'rubygems/dependency_list'
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require 'rubygems/installer'
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require 'tsort'
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module Gem
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class RequestSet
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include TSort
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def initialize(*deps)
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@dependencies = deps
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yield self if block_given?
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end
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attr_reader :dependencies
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# Declare that a gem of name +name+ with +reqs+ requirements
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# is needed.
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#
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def gem(name, *reqs)
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@dependencies << Gem::Dependency.new(name, reqs)
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end
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# Add +deps+ Gem::Depedency objects to the set.
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#
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def import(deps)
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@dependencies += deps
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end
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# Resolve the requested dependencies and return an Array of
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# Specification objects to be activated.
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#
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def resolve(set=nil)
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r = Gem::DependencyResolver.new(@dependencies, set)
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@requests = r.resolve
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end
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# Resolve the requested dependencies against the gems
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# available via Gem.path and return an Array of Specification
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# objects to be activated.
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#
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def resolve_current
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resolve DependencyResolver::CurrentSet.new
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end
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# Load a dependency management file.
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#
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def load_gemdeps(path)
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gf = GemDepedencyAPI.new(self, path)
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gf.load
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end
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def specs
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@specs ||= @requests.map { |r| r.full_spec }
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end
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def tsort_each_node(&block)
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@requests.each(&block)
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end
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def tsort_each_child(node)
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node.spec.dependencies.each do |dep|
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next if dep.type == :development
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match = @requests.find { |r| dep.match? r.spec.name, r.spec.version }
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if match
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begin
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yield match
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rescue TSort::Cyclic
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end
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else
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raise Gem::DependencyError, "Unresolved depedency found during sorting - #{dep}"
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end
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end
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end
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def sorted_requests
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@sorted ||= strongly_connected_components.flatten
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end
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def specs_in(dir)
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Dir["#{dir}/specifications/*.gemspec"].map do |g|
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Gem::Specification.load g
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end
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end
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def install_into(dir, force=true, &b)
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existing = force ? [] : specs_in(dir)
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dir = File.expand_path dir
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installed = []
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sorted_requests.each do |req|
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if existing.find { |s| s.full_name == req.spec.full_name }
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b.call req, nil if b
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next
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end
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path = req.download(dir)
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inst = Gem::Installer.new path, :install_dir => dir,
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:only_install_dir => true
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b.call req, inst if b
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inst.install
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installed << req
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end
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installed
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end
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def install(options, &b)
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if dir = options[:install_dir]
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return install_into(dir, false, &b)
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end
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cache_dir = options[:cache_dir] || Gem.dir
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specs = []
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sorted_requests.each do |req|
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if req.installed?
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b.call req, nil if b
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next
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end
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path = req.download cache_dir
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inst = Gem::Installer.new path, options
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b.call req, inst if b
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specs << inst.install
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end
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specs
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end
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# A semi-compatible DSL for Bundler's Gemfile format
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#
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class GemDepedencyAPI
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def initialize(set, path)
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@set = set
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@path = path
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end
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def load
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instance_eval File.read(@path).untaint, @path, 1
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end
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# DSL
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def source(url)
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end
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def gem(name, *reqs)
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# Ignore the opts for now.
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reqs.pop if reqs.last.kind_of?(Hash)
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@set.gem name, *reqs
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end
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def platform(what)
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if what == :ruby
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yield
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end
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end
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alias_method :platforms, :platform
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def group(*what)
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end
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end
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end
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end
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