Vendor the bundler project

railties/lib/vendor/bundler/LICENSE

@@ -0,0 +1,20 @@
+Copyright (c) 2009 Engine Yard
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

railties/lib/vendor/bundler/Rakefile

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+require 'rubygems' unless ENV['NO_RUBYGEMS']
+require 'rake/gempackagetask'
+require 'rubygems/specification'
+require 'date'
+require 'spec/rake/spectask'
+
+spec = Gem::Specification.new do |s|
+  s.name = "bundler"
+  s.version = "0.0.1"
+  s.author = "Your Name"
+  s.email = "Your Email"
+  s.homepage = "http://example.com"
+  s.description = s.summary = "A gem that provides..."
+
+  s.platform = Gem::Platform::RUBY
+  s.has_rdoc = true
+  s.extra_rdoc_files = ["README", "LICENSE"]
+  s.summary = ""
+
+  # Uncomment this to add a dependency
+  # s.add_dependency "foo"
+
+  s.bindir       = "bin"
+  s.executables  = %w( gem_bundler )
+  s.require_path = 'lib'
+  s.files = %w(LICENSE README Rakefile) + Dir.glob("{bin,lib,spec}/**/*")
+end
+
+task :default => :spec
+
+desc "Run specs"
+Spec::Rake::SpecTask.new do |t|
+  t.spec_files = FileList['spec/**/*_spec.rb']
+  t.spec_opts = %w(-fs --color)
+end
+
+
+Rake::GemPackageTask.new(spec) do |pkg|
+  pkg.gem_spec = spec
+end
+
+desc "install the gem locally"
+task :install => [:package] do
+  sh %{sudo gem install pkg/#{GEM}-#{GEM_VERSION}}
+end
+
+desc "create a gemspec file"
+task :make_spec do
+  File.open("#{GEM}.gemspec", "w") do |file|
+    file.puts spec.to_ruby
+  end
+end

railties/lib/vendor/bundler/bin/gem_bundler

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+#!/usr/bin/env ruby
+require "optparse"
+require "bundler"
+
+options = {}
+
+parser = OptionParser.new do |op|
+  op.banner = "Usage: gem_bundler [OPTIONS] [PATH]"
+
+  op.on("-m", "--manifest MANIFEST") do |manifest|
+    options[:manifest] = manifest
+  end
+
+  op.on_tail("-h", "--help", "Show this message") do
+    puts op
+    exit
+  end
+end
+parser.parse!
+
+options[:path] = ARGV.shift
+
+unless options[:path]
+  puts parser
+  puts %(
+    [PATH] must be specified
+  )
+  exit
+end
+
+unless options[:manifest] && File.exist?(options[:manifest])
+  puts parser
+  puts %(
+    MANIFEST must be a valid manifest file
+  )
+  exit
+end
+
+
+Bundler.run(options)

railties/lib/vendor/bundler/lib/bundler.rb

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+require 'logger'
+require 'set'
+# Required elements of rubygems
+require "rubygems/remote_fetcher"
+require "rubygems/installer"
+
+require "bundler/gem_bundle"
+require "bundler/installer"
+require "bundler/finder"
+require "bundler/gem_specification"
+require "bundler/resolver"
+require "bundler/manifest"
+require "bundler/dependency"
+require "bundler/runtime"
+require "bundler/cli"
+
+module Bundler
+  VERSION = "0.5.0"
+
+  def self.run(options = {})
+    manifest = ManifestBuilder.load(options[:path], options[:manifest])
+    manifest.install
+  end
+end

railties/lib/vendor/bundler/lib/bundler/cli.rb

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+module Bundler
+  module CLI
+
+    def default_manifest
+      current = Pathname.new(Dir.pwd)
+
+      begin
+        manifest = current.join("Gemfile")
+        return manifest.to_s if File.exist?(manifest)
+        current = current.parent
+      end until current.root?
+      nil
+    end
+
+    module_function :default_manifest
+
+    def default_path
+      Pathname.new(File.dirname(default_manifest)).join("vendor").join("gems").to_s
+    end
+
+    module_function :default_path
+
+  end
+end

railties/lib/vendor/bundler/lib/bundler/dependency.rb

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+module Bundler
+  class Dependency
+
+    attr_reader :name, :version, :require_as, :only, :except
+
+    def initialize(name, options = {})
+      options.each do |k, v|
+        options[k.to_s] = v
+      end
+
+      @name       = name
+      @version    = options["version"] || ">= 0"
+      @require_as = Array(options["require_as"] || name)
+      @only       = Array(options["only"]).map {|e| e.to_s } if options["only"]
+      @except     = Array(options["except"]).map {|e| e.to_s } if options["except"]
+    end
+
+    def in?(environment)
+      environment = environment.to_s
+
+      return false unless !@only || @only.include?(environment)
+      return false if @except && @except.include?(environment)
+      true
+    end
+
+    def to_s
+      to_gem_dependency.to_s
+    end
+
+    def to_gem_dependency
+      @gem_dep ||= Gem::Dependency.new(name, version)
+    end
+
+  end
+end

railties/lib/vendor/bundler/lib/bundler/finder.rb

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+module Bundler
+  class Finder
+    def initialize(*sources)
+      @results = {}
+      @index   = Hash.new { |h,k| h[k] = {} }
+
+      sources.each { |source| fetch(source) }
+    end
+
+    def resolve(*dependencies)
+      resolved = Resolver.resolve(dependencies, self)
+      resolved && GemBundle.new(resolved.all_specs)
+    end
+
+    def fetch(source)
+      deflated = Gem::RemoteFetcher.fetcher.fetch_path("#{source}/Marshal.4.8.Z")
+      inflated = Gem.inflate deflated
+
+      append(Marshal.load(inflated), source)
+    rescue Gem::RemoteFetcher::FetchError => e
+      raise ArgumentError, "#{source} is not a valid source: #{e.message}"
+    end
+
+    def append(index, source)
+      index.gems.values.each do |spec|
+        next unless Gem::Platform.match(spec.platform)
+        spec.source = source
+        @index[spec.name][spec.version] ||= spec
+      end
+      self
+    end
+
+    def search(dependency)
+      @results[dependency.hash] ||= begin
+        possibilities = @index[dependency.name].values
+        possibilities.select do |spec|
+          dependency =~ spec
+        end.sort_by {|s| s.version }
+      end
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/gem_bundle.rb

@@ -0,0 +1,23 @@
+module Bundler
+  class GemBundle < Array
+    def download(directory)
+      FileUtils.mkdir_p(directory)
+
+      current = Dir[File.join(directory, "cache", "*.gem*")]
+
+      each do |spec|
+        cached = File.join(directory, "cache", "#{spec.full_name}.gem")
+
+        unless File.file?(cached)
+          Gem::RemoteFetcher.fetcher.download(spec, spec.source, directory)
+        end
+
+        current.delete(cached)
+      end
+
+      current.each { |file| File.delete(file) }
+
+      self
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/gem_specification.rb

@@ -0,0 +1,10 @@
+module Gem
+  class Specification
+    attribute :source
+
+    def source=(source)
+      @source = source.is_a?(URI) ? source : URI.parse(source)
+      raise ArgumentError, "The source must be an absolute URI" unless @source.absolute?
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/installer.rb

@@ -0,0 +1,44 @@
+module Bundler
+  class Installer
+    def initialize(path)
+      if !File.directory?(path)
+        raise ArgumentError, "#{path} is not a directory"
+      elsif !File.directory?(File.join(path, "cache"))
+        raise ArgumentError, "#{path} is not a valid environment (it does not contain a cache directory)"
+      end
+
+      @path = path
+      @gems = Dir[(File.join(path, "cache", "*.gem"))]
+    end
+
+    def install(options = {})
+      bin_dir = options[:bin_dir] ||= File.join(@path, "bin")
+
+      specs = Dir[File.join(@path, "specifications", "*.gemspec")]
+      gems  = Dir[File.join(@path, "gems", "*")]
+
+      @gems.each do |gem|
+        name      = File.basename(gem).gsub(/\.gem$/, '')
+        installed = specs.any? { |g| File.basename(g) == "#{name}.gemspec" } &&
+          gems.any? { |g| File.basename(g) == name }
+
+        unless installed
+          installer = Gem::Installer.new(gem, :install_dir => @path,
+            :ignore_dependencies => true,
+            :env_shebang => true,
+            :wrappers => true,
+            :bin_dir => bin_dir)
+          installer.install
+        end
+
+        # remove this spec
+        specs.delete_if { |g| File.basename(g) == "#{name}.gemspec"}
+        gems.delete_if  { |g| File.basename(g) == name }
+      end
+
+      (specs + gems).each do |path|
+        FileUtils.rm_rf(path)
+      end
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/manifest.rb

@@ -0,0 +1,130 @@
+require "rubygems/source_index"
+require "pathname"
+
+module Bundler
+  class VersionConflict < StandardError; end
+
+  class Manifest
+    attr_reader :sources, :dependencies, :path
+
+    def initialize(sources, dependencies, path)
+      sources.map! {|s| s.is_a?(URI) ? s : URI.parse(s) }
+      @sources, @dependencies, @path = sources, dependencies, Pathname.new(path)
+    end
+
+    def fetch
+      return if all_gems_installed?
+
+      finder = Finder.new(*sources)
+      unless bundle = finder.resolve(*gem_dependencies)
+        gems = @dependencies.map {|d| "  #{d.to_s}" }.join("\n")
+        raise VersionConflict, "No compatible versions could be found for:\n#{gems}"
+      end
+
+      bundle.download(@path)
+    end
+
+    def install(options = {})
+      fetch
+      installer = Installer.new(@path)
+      installer.install # options come here
+      create_load_paths_files(File.join(@path, "environments"))
+      create_fake_rubygems(File.join(@path, "environments"))
+    end
+
+    def activate(environment = "default")
+      require File.join(@path, "environments", "#{environment}.rb")
+    end
+
+    def require_all
+      dependencies.each do |dep|
+        dep.require_as.each {|file| require file }
+      end
+    end
+
+    def gems_for(environment)
+      deps     = dependencies.select { |d| d.in?(environment) }
+      deps.map! { |d| d.to_gem_dependency }
+      index    = Gem::SourceIndex.from_gems_in(File.join(@path, "specifications"))
+      Resolver.resolve(deps, index).all_specs
+    end
+
+    def environments
+      envs = dependencies.map {|dep| Array(dep.only) + Array(dep.except) }.flatten
+      envs << "default"
+    end
+
+  private
+
+    def gem_dependencies
+      @gem_dependencies ||= dependencies.map { |d| d.to_gem_dependency }
+    end
+
+    def all_gems_installed?
+      gem_versions = {}
+
+      Dir[File.join(@path, "cache", "*.gem")].each do |file|
+        file =~ /\/([^\/]+)-([\d\.]+)\.gem$/
+        name, version = $1, $2
+        gem_versions[name] = Gem::Version.new(version)
+      end
+
+      gem_dependencies.all? do |dep|
+        gem_versions[dep.name] &&
+        dep.version_requirements.satisfied_by?(gem_versions[dep.name])
+      end
+    end
+
+    def create_load_paths_files(path)
+      FileUtils.mkdir_p(path)
+      environments.each do |environment|
+        gem_specs = gems_for(environment)
+        File.open(File.join(path, "#{environment}.rb"), "w") do |file|
+          file.puts <<-RUBY_EVAL
+            module Bundler
+              def self.rubygems_required
+                #{create_gem_stubs(path, gem_specs)}
+              end
+            end
+          RUBY_EVAL
+          file.puts "$LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__))"
+          load_paths_for_specs(gem_specs).each do |load_path|
+            file.puts "$LOAD_PATH.unshift #{load_path.inspect}"
+          end
+        end
+      end
+    end
+
+    def create_gem_stubs(path, gem_specs)
+      gem_specs.map do |spec|
+        path = File.expand_path(File.join(path, '..', 'specifications', "#{spec.full_name}.gemspec"))
+        %{
+          Gem.loaded_specs["#{spec.name}"] = eval(File.read("#{path}"))
+        }
+      end.join("\n")
+    end
+
+    def create_fake_rubygems(path)
+      File.open(File.join(path, "rubygems.rb"), "w") do |file|
+        file.puts <<-RUBY_EVAL
+          $:.delete File.expand_path(File.dirname(__FILE__))
+          load "rubygems.rb"
+          if defined?(Bundler) && Bundler.respond_to?(:rubygems_required)
+            Bundler.rubygems_required
+          end
+        RUBY_EVAL
+      end
+    end
+
+    def load_paths_for_specs(specs)
+      load_paths = []
+      specs.each do |spec|
+        load_paths << File.join(spec.full_gem_path, spec.bindir) if spec.bindir
+        spec.require_paths.each do |path|
+          load_paths << File.join(spec.full_gem_path, path)
+        end
+      end
+      load_paths
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/resolver.rb

@@ -0,0 +1,19 @@
+require 'bundler/resolver/inspect'
+require 'bundler/resolver/search'
+require 'bundler/resolver/engine'
+require 'bundler/resolver/stack'
+require 'bundler/resolver/state'
+
+module Bundler
+  module Resolver
+    def self.resolve(deps, source_index = Gem.source_index, logger = nil)
+      unless logger
+        logger = Logger.new($stderr)
+        logger.datetime_format = ""
+        logger.level = ENV["GEM_RESOLVER_DEBUG"] ? Logger::DEBUG : Logger::ERROR
+      end
+
+      Engine.resolve(deps, source_index, logger)
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/resolver/builders.rb

@@ -0,0 +1,61 @@
+module Bundler
+  module Resolver
+    module Builders
+      def build_index(&block)
+        index = Gem::SourceIndex.new
+        IndexBuilder.run(index, &block) if block_given?
+        index
+      end
+
+      def build_spec(name, version, &block)
+        spec = Gem::Specification.new
+        spec.instance_variable_set(:@name, name)
+        spec.instance_variable_set(:@version, Gem::Version.new(version))
+        DepBuilder.run(spec, &block) if block_given?
+        spec
+      end
+
+      def build_dep(name, requirements, type = :runtime)
+        Gem::Dependency.new(name, requirements, type)
+      end
+
+      class IndexBuilder
+        include Builders
+
+        def self.run(index, &block)
+          new(index).run(&block)
+        end
+
+        def initialize(index)
+          @index = index
+        end
+
+        def run(&block)
+          instance_eval(&block)
+        end
+
+        def add_spec(*args, &block)
+          @index.add_spec(build_spec(*args, &block))
+        end
+      end
+
+      class DepBuilder
+        def self.run(spec, &block)
+          new(spec).run(&block)
+        end
+
+        def initialize(spec)
+          @spec = spec
+        end
+
+        def run(&block)
+          instance_eval(&block)
+        end
+
+        def runtime(name, requirements)
+          @spec.add_runtime_dependency(name, requirements)
+        end
+      end
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/resolver/engine.rb

@@ -0,0 +1,38 @@
+module Bundler
+  module Resolver
+    class ClosedSet < Set
+    end
+
+    class Engine
+      include Search, Inspect
+
+      def self.resolve(deps, source_index, logger)
+        new(deps, source_index, logger).resolve
+      end
+
+      def initialize(deps, source_index, logger)
+        @deps, @source_index, @logger = deps, source_index, logger
+        logger.debug "searching for #{gem_resolver_inspect(@deps)}"
+      end
+      attr_reader :deps, :source_index, :logger, :solution
+
+      def resolve
+        state = State.initial(self, [], Stack.new, Stack.new([[[], @deps.dup]]))
+        if solution = search(state)
+          logger.info "got the solution with #{solution.all_specs.size} specs"
+          solution.dump(Logger::INFO)
+          solution
+        end
+      end
+
+      def open
+        @open ||= []
+      end
+
+      def closed
+        @closed ||= ClosedSet.new
+      end
+    end
+  end
+
+end

railties/lib/vendor/bundler/lib/bundler/resolver/inspect.rb

@@ -0,0 +1,24 @@
+module Bundler
+  module Resolver
+    module Inspect
+      def gem_resolver_inspect(o)
+        case o
+        when Gem::Specification
+          "#<Spec: #{o.full_name}>"
+        when Array
+          '[' + o.map {|x| gem_resolver_inspect(x)}.join(", ") + ']'
+        when Set
+          gem_resolver_inspect(o.to_a)
+        when Hash
+          '{' + o.map {|k,v| "#{gem_resolver_inspect(k)} => #{gem_resolver_inspect(v)}"}.join(", ") + '}'
+        when Stack
+          o.gem_resolver_inspect
+        else
+          o.inspect
+        end
+      end
+
+      module_function :gem_resolver_inspect
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/resolver/search.rb

@@ -0,0 +1,71 @@
+module Bundler
+  module Resolver
+    module Search
+      def search(initial, max_depth = (1.0 / 0.0))
+        if initial.goal_met?
+          return initial
+        end
+
+        open << initial
+
+        while open.any?
+          current = open.pop
+          closed << current
+
+          new = []
+          current.each_possibility do |attempt|
+            unless closed.include?(attempt)
+              if attempt.goal_met?
+                return attempt
+              elsif attempt.depth < max_depth
+                new << attempt
+              end
+            end
+          end
+          new.reverse.each do |state|
+            open << state
+          end
+        end
+
+        nil
+      end
+
+      def open
+        raise "implement #open in #{self.class}"
+      end
+
+      def closed
+        raise "implement #closed in #{self.class}"
+      end
+
+      module Node
+        def self.included(base)
+          base.extend(ClassMethods)
+        end
+
+        module ClassMethods
+          def initial(*data)
+            new(0, *data)
+          end
+        end
+
+        def initialize(depth)
+          @depth = depth
+        end
+        attr_reader :depth
+
+        def child(*data)
+          self.class.new(@depth + 1, *data)
+        end
+
+        def each_possibility
+          raise "implement #each_possibility on #{self.class}"
+        end
+
+        def goal_met?
+          raise "implement #goal_met? on #{self.class}"
+        end
+      end
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/resolver/stack.rb

@@ -0,0 +1,72 @@
+module Bundler
+  module Resolver
+    class Stack
+      def initialize(initial = [])
+        @data = []
+        initial.each do |(path,value)|
+          self[path] = value
+        end
+      end
+
+      def last
+        @data.last
+      end
+
+      def []=(path, value)
+        raise ArgumentError, "#{path.inspect} already has a value" if key?(path)
+        @data << [path.dup, value]
+      end
+
+      def [](path)
+        if key?(path)
+          _, value = @data.find do |(k,v)|
+            k == path
+          end
+          value
+        else
+          raise "No value for #{path.inspect}"
+        end
+      end
+
+      def key?(path)
+        @data.any? do |(k,v)|
+          k == path
+        end
+      end
+
+      def each
+        @data.each do |(k,v)|
+          yield k, v
+        end
+      end
+
+      def map
+        @data.map do |(k,v)|
+          yield k, v
+        end
+      end
+
+      def each_value
+        @data.each do |(k,v)|
+          yield v
+        end
+      end
+
+      def dup
+        self.class.new(@data.dup)
+      end
+
+      def to_s
+        @data.to_s
+      end
+
+      def inspect
+        @data.inspect
+      end
+
+      def gem_resolver_inspect
+        Inspect.gem_resolver_inspect(@data)
+      end
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/resolver/state.rb

@@ -0,0 +1,172 @@
+module Bundler
+  module Resolver
+    class State
+      include Search::Node, Inspect
+
+      def initialize(depth, engine, path, spec_stack, dep_stack)
+        super(depth)
+        @engine, @path, @spec_stack, @dep_stack = engine, path, spec_stack, dep_stack
+      end
+      attr_reader :path
+
+      def logger
+        @engine.logger
+      end
+
+      def goal_met?
+        logger.info "checking if goal is met"
+        dump
+        no_duplicates?
+        all_deps.all? do |dep|
+          dependency_satisfied?(dep)
+        end
+      end
+
+      def no_duplicates?
+        names = []
+        all_specs.each do |s|
+          if names.include?(s.name)
+            raise "somehow got duplicates for #{s.name}"
+          end
+          names << s.name
+        end
+      end
+
+      def dependency_satisfied?(dep)
+        all_specs.any? do |spec|
+          spec.satisfies_requirement?(dep)
+        end
+      end
+
+      def each_possibility(&block)
+        index, dep = remaining_deps.first
+        if dep
+          logger.warn "working on #{dep} for #{spec_name}"
+          handle_dep(index, dep, &block)
+        else
+          logger.warn "no dependencies left for #{spec_name}"
+          jump_to_parent(&block)
+        end
+      end
+
+      def handle_dep(index, dep)
+        specs = @engine.source_index.search(dep)
+
+        specs.reverse.each do |s|
+          logger.info "attempting with spec: #{s.full_name}"
+          new_path = @path + [index]
+          new_spec_stack = @spec_stack.dup
+          new_dep_stack = @dep_stack.dup
+
+          new_spec_stack[new_path] = s
+          new_dep_stack[new_path] = s.runtime_dependencies.sort_by do |dep|
+            @engine.source_index.search(dep).size
+          end
+          yield child(@engine, new_path, new_spec_stack, new_dep_stack)
+        end
+      end
+
+      def jump_to_parent
+        if @path.empty?
+          dump
+          logger.warn "at the end"
+          return
+        end
+
+        logger.info "jumping to parent for #{spec_name}"
+        new_path = @path[0..-2]
+        new_spec_stack = @spec_stack.dup
+        new_dep_stack = @dep_stack.dup
+
+        yield child(@engine, new_path, new_spec_stack, new_dep_stack)
+      end
+
+      def remaining_deps
+        remaining_deps_for(@path)
+      end
+
+      def remaining_deps_for(path)
+        no_duplicates?
+        remaining = []
+        @dep_stack[path].each_with_index do |dep,i|
+          remaining << [i, dep] unless all_specs.find {|s| s.name == dep.name}
+        end
+        remaining
+      end
+
+      def deps
+        @dep_stack[@path]
+      end
+
+      def spec
+        @spec_stack[@path]
+      end
+
+      def spec_name
+        @path.empty? ? "<top>" : spec.full_name
+      end
+
+      def all_deps
+        all_deps = Set.new
+        @dep_stack.each_value do |deps|
+          all_deps.merge(deps)
+        end
+        all_deps.to_a
+      end
+
+      def all_specs
+        @spec_stack.map do |path,spec|
+          spec
+        end
+      end
+
+      def dump(level = Logger::DEBUG)
+        logger.add level, "v" * 80
+        logger.add level, "path: #{@path.inspect}"
+        logger.add level, "deps: (#{deps.size})"
+        deps.map do |dep|
+          logger.add level, gem_resolver_inspect(dep)
+        end
+        logger.add level, "remaining_deps: (#{remaining_deps.size})"
+        remaining_deps.each do |dep|
+          logger.add level, gem_resolver_inspect(dep)
+        end
+        logger.add level, "dep_stack: "
+        @dep_stack.each do |path,deps|
+          logger.add level, "#{path.inspect} (#{deps.size})"
+          deps.each do |dep|
+            logger.add level, "-> #{gem_resolver_inspect(dep)}"
+          end
+        end
+        logger.add level, "spec_stack: "
+        @spec_stack.each do |path,spec|
+          logger.add level, "#{path.inspect}: #{gem_resolver_inspect(spec)}"
+        end
+        logger.add level, "^" * 80
+      end
+
+      def to_dot
+        io = StringIO.new
+        io.puts 'digraph deps {'
+        io.puts '  fontname = "Courier";'
+        io.puts '  mincross = 4.0;'
+        io.puts '  ratio = "auto";'
+        dump_to_dot(io, "<top>", [])
+        io.puts '}'
+        io.string
+      end
+
+      def dump_to_dot(io, name, path)
+        @dep_stack[path].each_with_index do |dep,i|
+          new_path = path + [i]
+          spec_name = all_specs.find {|x| x.name == dep.name}.full_name
+          io.puts '  "%s" -> "%s";' % [name, dep.to_s]
+          io.puts '  "%s" -> "%s";' % [dep.to_s, spec_name]
+          if @spec_stack.key?(new_path)
+            dump_to_dot(io, spec_name, new_path)
+          end
+        end
+      end
+    end
+  end
+end

railties/lib/vendor/bundler/lib/bundler/runtime.rb

@@ -0,0 +1,39 @@
+module Bundler
+  class ManifestBuilder
+
+    attr_reader :sources
+
+    def self.build(path, string)
+      builder = new(path)
+      builder.instance_eval(string)
+      builder.to_manifest
+    end
+
+    def self.load(path, file)
+      string = File.read(file)
+      build(path, string)
+    end
+
+    def initialize(path)
+      @path         = path
+      @sources      = %w(http://gems.rubyforge.org)
+      @dependencies = []
+    end
+
+    def to_manifest
+      Manifest.new(@sources, @dependencies, @path)
+    end
+
+    def source(source)
+      @sources << source
+    end
+
+    def gem(name, *args)
+      options = args.last.is_a?(Hash) ? args.pop : {}
+      version = args.last
+
+      @dependencies << Dependency.new(name, options.merge(:version => version))
+    end
+
+  end
+end