Import RubyGems trunk revision 1493.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13862 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 796 insertions, 0 deletions

diff --git a/test/rubygems/test_gem_installer.rb b/test/rubygems/test_gem_installer.rb
new file mode 100644
index 0000000000..05e38f67f8
--- /dev/null
+++ b/test/rubygems/test_gem_installer.rb
@@ -0,0 +1,796 @@
+#--
+# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
+# All rights reserved.
+# See LICENSE.txt for permissions.
+#++
+
+require 'test/unit'
+require File.join(File.expand_path(File.dirname(__FILE__)), 'gemutilities')
+require 'rubygems/installer'
+
+class Gem::Installer
+  attr_writer :format
+  attr_writer :gem_dir
+  attr_writer :gem_home
+  attr_writer :env_shebang
+  attr_writer :ignore_dependencies
+  attr_writer :security_policy
+  attr_writer :spec
+  attr_writer :wrappers
+end
+
+class TestGemInstaller < RubyGemTestCase
+
+  def setup
+    super
+
+    @spec = quick_gem "a"
+    @gem = File.join @tempdir, "#{@spec.full_name}.gem"
+
+    util_build_gem @spec
+    FileUtils.mv File.join(@gemhome, 'cache', "#{@spec.full_name}.gem"),
+                 @tempdir
+
+    @installer = Gem::Installer.new @gem
+    @installer.gem_dir = util_gem_dir
+    @installer.gem_home = @gemhome
+    @installer.spec = @spec
+  end
+
+  def util_gem_dir(version = '0.0.2')
+    File.join @gemhome, "gems", "a-#{version}" # HACK
+  end
+
+  def util_gem_bindir(version = '0.0.2')
+    File.join util_gem_dir(version), "bin"
+  end
+
+  def util_inst_bindir
+    File.join @gemhome, "bin"
+  end
+
+  def util_make_exec(version = '0.0.2', shebang = "#!/usr/bin/ruby")
+    @spec.executables = ["my_exec"]
+
+    FileUtils.mkdir_p util_gem_bindir(version)
+    exec_file = File.join(util_gem_bindir(version), "my_exec")
+    File.open exec_file, 'w' do |f|
+      f.puts shebang
+    end
+  end
+
+  def test_app_script_text
+    util_make_exec '0.0.2', ''
+
+    expected = <<-EOF
+#!#{Gem.ruby}
+#
+# This file was generated by RubyGems.
+#
+# The application 'a' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+require 'rubygems'
+
+version = \">= 0\"
+
+if ARGV.first =~ /^_(.*)_$/ and Gem::Version.correct? $1 then
+  version = $1
+  ARGV.shift
+end
+
+gem 'a', version
+load 'my_exec'
+    EOF
+
+    wrapper = @installer.app_script_text 'my_exec'
+    assert_equal expected, wrapper
+  end
+
+  def test_build_extensions_none
+    use_ui @ui do
+      @installer.build_extensions
+    end
+
+    assert_equal '', @ui.output
+    assert_equal '', @ui.error
+
+    assert !File.exist?('gem_make.out')
+  end
+
+  def test_build_extensions_extconf_bad
+    @spec.extensions << 'extconf.rb'
+
+    e = assert_raise Gem::Installer::ExtensionBuildError do
+      use_ui @ui do
+        @installer.build_extensions
+      end
+    end
+
+    assert_match(/\AERROR: Failed to build gem native extension.$/, e.message)
+
+    assert_equal "Building native extensions.  This could take a while...\n",
+                 @ui.output
+    assert_equal '', @ui.error
+
+    gem_make_out = File.join @gemhome, 'gems', @spec.full_name, 'gem_make.out'
+    expected = <<-EOF
+#{Gem.ruby} extconf.rb
+#{Gem.ruby}: No such file or directory -- extconf.rb (LoadError)
+    EOF
+
+    assert_equal expected, File.read(gem_make_out)
+  end
+
+  def test_build_extensions_unsupported
+    @spec.extensions << nil
+
+    e = assert_raise Gem::Installer::ExtensionBuildError do
+      use_ui @ui do
+        @installer.build_extensions
+      end
+    end
+
+    assert_match(/^No builder for extension ''$/, e.message)
+
+    assert_equal "Building native extensions.  This could take a while...\n",
+                 @ui.output
+    assert_equal '', @ui.error
+
+    assert_equal "No builder for extension ''\n", File.read('gem_make.out')
+  ensure
+    FileUtils.rm_f 'gem_make.out'
+  end
+
+  def test_ensure_dependency
+    dep = Gem::Dependency.new 'a', '>= 0.0.2'
+    assert @installer.ensure_dependency(@spec, dep)
+
+    dep = Gem::Dependency.new 'b', '> 0.0.2'
+    e = assert_raise Gem::InstallError do
+      @installer.ensure_dependency @spec, dep
+    end
+
+    assert_equal 'a requires b (> 0.0.2)', e.message
+  end
+
+  def test_expand_and_validate_gem_dir
+    @installer.gem_dir = '/nonexistent'
+    expanded_gem_dir = @installer.send(:expand_and_validate_gem_dir)
+    if win_platform?
+      expected = File.join(Config::CONFIG['bindir'][0..2], 'nonexistent').downcase
+      expanded_gem_dir = expanded_gem_dir.downcase
+    else
+      expected = '/nonexistent'
+    end
+
+    assert_equal expected, expanded_gem_dir
+  end
+
+  def test_extract_files
+    format = Object.new
+    def format.file_entries
+      [[{'size' => 7, 'mode' => 0400, 'path' => 'thefile'}, 'thefile']]
+    end
+
+    @installer.format = format
+
+    @installer.extract_files
+
+    assert_equal 'thefile', File.read(File.join(util_gem_dir, 'thefile'))
+  end
+
+  def test_extract_files_bad_dest
+    @installer.gem_dir = 'somedir'
+    @installer.format = nil
+    e = assert_raise ArgumentError do
+      @installer.extract_files
+    end
+
+    assert_equal 'format required to extract from', e.message
+  end
+
+  def test_extract_files_relative
+    format = Object.new
+    def format.file_entries
+      [[{'size' => 10, 'mode' => 0644, 'path' => '../thefile'}, '../thefile']]
+    end
+
+    @installer.format = format
+
+    e = assert_raise Gem::InstallError do
+      @installer.extract_files
+    end
+
+    assert_equal "attempt to install file into \"../thefile\" under #{util_gem_dir.inspect}",
+                 e.message
+    assert_equal false, File.file?(File.join(@tempdir, '../thefile')),
+                 "You may need to remove this file if you broke the test once"
+  end
+
+  def test_extract_files_absolute
+    format = Object.new
+    def format.file_entries
+      [[{'size' => 8, 'mode' => 0644, 'path' => '/thefile'}, '/thefile']]
+    end
+
+    @installer.format = format
+
+    e = assert_raise Gem::InstallError do
+      @installer.extract_files
+    end
+
+    assert_equal 'attempt to install file into "/thefile"', e.message
+    assert_equal false, File.file?(File.join('/thefile')),
+                 "You may need to remove this file if you broke the test once"
+  end
+
+  def test_generate_bin_scripts
+    @installer.wrappers = true
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    assert_equal true, File.directory?(util_inst_bindir)
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal true, File.exist?(installed_exec)
+    assert_equal(0100755, File.stat(installed_exec).mode) unless win_platform?
+
+    wrapper = File.read installed_exec
+    assert_match %r|generated by RubyGems|, wrapper
+  end
+
+  def test_generate_bin_scripts_install_dir
+    @installer.wrappers = true
+    @spec.executables = ["my_exec"]
+
+    gem_dir = File.join "#{@gemhome}2", 'gems', @spec.full_name
+    gem_bindir = File.join gem_dir, 'bin'
+    FileUtils.mkdir_p gem_bindir
+    File.open File.join(gem_bindir, "my_exec"), 'w' do |f|
+      f.puts "#!/bin/ruby"
+    end
+
+    @installer.gem_home = "#{@gemhome}2"
+    @installer.gem_dir = gem_dir
+
+    @installer.generate_bin
+
+    installed_exec = File.join("#{@gemhome}2", 'bin', 'my_exec')
+    assert_equal true, File.exist?(installed_exec)
+    assert_equal(0100755, File.stat(installed_exec).mode) unless win_platform?
+
+    wrapper = File.read installed_exec
+    assert_match %r|generated by RubyGems|, wrapper
+  end
+
+  def test_generate_bin_scripts_no_execs
+    @installer.wrappers = true
+    @installer.generate_bin
+    assert_equal false, File.exist?(util_inst_bindir)
+  end
+
+  def test_generate_bin_scripts_no_perms
+    @installer.wrappers = true
+    util_make_exec
+
+    Dir.mkdir util_inst_bindir
+    File.chmod 0000, util_inst_bindir
+
+    assert_raises Gem::FilePermissionError do
+      @installer.generate_bin
+    end
+
+  ensure
+    File.chmod 0700, util_inst_bindir unless $DEBUG
+  end
+
+  def test_generate_bin_symlinks
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    assert_equal true, File.directory?(util_inst_bindir)
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal true, File.symlink?(installed_exec)
+    assert_equal(File.join(util_gem_dir, "bin", "my_exec"),
+                 File.readlink(installed_exec))
+  end
+
+  def test_generate_bin_symlinks_no_execs
+    @installer.wrappers = false
+    @installer.generate_bin
+    assert_equal false, File.exist?(util_inst_bindir)
+  end
+
+  def test_generate_bin_symlinks_no_perms
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    Dir.mkdir util_inst_bindir
+    File.chmod 0000, util_inst_bindir
+
+    assert_raises Gem::FilePermissionError do
+      @installer.generate_bin
+    end
+
+  ensure
+    File.chmod 0700, util_inst_bindir unless $DEBUG
+  end
+
+  def test_generate_bin_symlinks_update_newer
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_dir, "bin", "my_exec"),
+                 File.readlink(installed_exec))
+
+    @spec = Gem::Specification.new do |s|
+      s.files = ['lib/code.rb']
+      s.name = "a"
+      s.version = "0.0.3"
+      s.summary = "summary"
+      s.description = "desc"
+      s.require_path = 'lib'
+    end
+
+    util_make_exec '0.0.3'
+    @installer.gem_dir = File.join util_gem_dir('0.0.3')
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_bindir('0.0.3'), "my_exec"),
+                 File.readlink(installed_exec),
+                 "Ensure symlink moved to latest version")
+  end
+
+  def test_generate_bin_symlinks_update_older
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_dir, "bin", "my_exec"),
+                 File.readlink(installed_exec))
+
+    spec = Gem::Specification.new do |s|
+      s.files = ['lib/code.rb']
+      s.name = "a"
+      s.version = "0.0.1"
+      s.summary = "summary"
+      s.description = "desc"
+      s.require_path = 'lib'
+    end
+
+    util_make_exec '0.0.1'
+    @installer.gem_dir = util_gem_dir('0.0.1')
+    @installer.spec = spec
+
+    @installer.generate_bin
+
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_dir('0.0.2'), "bin", "my_exec"),
+                 File.readlink(installed_exec),
+                 "Ensure symlink not moved")
+  end
+
+  def test_generate_bin_symlinks_update_remove_wrapper
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = true
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal true, File.exist?(installed_exec)
+
+    @spec = Gem::Specification.new do |s|
+      s.files = ['lib/code.rb']
+      s.name = "a"
+      s.version = "0.0.3"
+      s.summary = "summary"
+      s.description = "desc"
+      s.require_path = 'lib'
+    end
+
+    @installer.wrappers = false
+    util_make_exec '0.0.3'
+    @installer.gem_dir = util_gem_dir '0.0.3'
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_dir('0.0.3'), "bin", "my_exec"),
+                 File.readlink(installed_exec),
+                 "Ensure symlink moved to latest version")
+  end
+
+  def test_generate_bin_symlinks_win32
+    old_arch = Config::CONFIG["arch"]
+    Config::CONFIG["arch"] = "win32"
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    use_ui @ui do
+      @installer.generate_bin
+    end
+
+    assert_equal true, File.directory?(util_inst_bindir)
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal true, File.exist?(installed_exec)
+
+    assert_match(/Unable to use symlinks on win32, installing wrapper/i,
+                 @ui.error)
+    
+    expected_mode = win_platform? ? 0100644 : 0100755
+    assert_equal expected_mode, File.stat(installed_exec).mode
+
+    wrapper = File.read installed_exec
+    assert_match(/generated by RubyGems/, wrapper)
+  ensure
+    Config::CONFIG["arch"] = old_arch
+  end
+
+  def test_generate_bin_uses_default_shebang
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = true
+    util_make_exec
+
+    @installer.generate_bin
+
+    default_shebang = File.join(Config::CONFIG['bindir'], Config::CONFIG['ruby_install_name'])
+    shebang_line = open("#{@gemhome}/bin/my_exec") { |f| f.readlines.first }
+    assert_match(/\A#!/, shebang_line)
+    assert_match(/#{default_shebang}/, shebang_line)
+  end
+
+  def test_install
+    util_setup_gem
+
+    use_ui @ui do
+      assert_equal @spec, @installer.install
+    end
+
+    gemdir = File.join @gemhome, 'gems', @spec.full_name
+    assert File.exist?(gemdir)
+
+    exe = File.join(gemdir, 'bin', 'executable')
+    assert File.exist?(exe)
+    exe_mode = File.stat(exe).mode & 0111
+    assert_equal 0111, exe_mode, "0%o" % exe_mode unless win_platform?
+
+    assert File.exist?(File.join(gemdir, 'lib', 'code.rb'))
+
+    assert File.exist?(File.join(gemdir, 'ext', 'a', 'Rakefile'))
+
+    spec_file = File.join(@gemhome, 'specifications',
+                          "#{@spec.full_name}.gemspec")
+
+    assert_equal spec_file, @spec.loaded_from
+    assert File.exist?(spec_file)
+  end
+
+  def test_install_bad_gem
+    gem = nil
+
+    use_ui @ui do
+      Dir.chdir @tempdir do Gem::Builder.new(@spec).build end
+      gem = File.join @tempdir, "#{@spec.full_name}.gem"
+    end
+
+    gem_data = File.open gem, 'rb' do |fp| fp.read 1024 end
+    File.open gem, 'wb' do |fp| fp.write gem_data end
+
+    e = assert_raise Gem::InstallError do
+      use_ui @ui do
+        @installer = Gem::Installer.new gem
+        @installer.install
+      end
+    end
+
+    assert_equal "invalid gem format for #{gem}", e.message
+  end
+
+  def test_install_check_dependencies
+    @spec.add_dependency 'b', '> 5'
+    util_setup_gem
+
+    use_ui @ui do
+      assert_raise Gem::InstallError do
+        @installer.install
+      end
+    end
+  end
+
+  def test_install_force
+    use_ui @ui do
+      installer = Gem::Installer.new old_ruby_required, :force => true
+      installer.install
+    end
+
+    gem_dir = File.join(@gemhome, 'gems', 'old_ruby_required-0.0.1')
+    assert File.exist?(gem_dir)
+  end
+
+  def test_install_ignore_dependencies
+    @spec.add_dependency 'b', '> 5'
+    util_setup_gem
+    @installer.ignore_dependencies = true
+
+    use_ui @ui do
+      assert_equal @spec, @installer.install
+    end
+
+    gemdir = File.join @gemhome, 'gems', @spec.full_name
+    assert File.exist?(gemdir)
+
+    exe = File.join(gemdir, 'bin', 'executable')
+    assert File.exist?(exe)
+    exe_mode = File.stat(exe).mode & 0111
+    assert_equal 0111, exe_mode, "0%o" % exe_mode unless win_platform?
+    assert File.exist?(File.join(gemdir, 'lib', 'code.rb'))
+
+    assert File.exist?(File.join(@gemhome, 'specifications',
+                                 "#{@spec.full_name}.gemspec"))
+  end
+
+  def test_install_missing_dirs
+    FileUtils.rm_f File.join(Gem.dir, 'cache')
+    FileUtils.rm_f File.join(Gem.dir, 'docs')
+    FileUtils.rm_f File.join(Gem.dir, 'specifications')
+
+    use_ui @ui do
+      Dir.chdir @tempdir do Gem::Builder.new(@spec).build end
+      gem = File.join @tempdir, "#{@spec.full_name}.gem"
+
+      @installer.install
+    end
+
+    File.directory? File.join(Gem.dir, 'cache')
+    File.directory? File.join(Gem.dir, 'docs')
+    File.directory? File.join(Gem.dir, 'specifications')
+
+    assert File.exist?(File.join(@gemhome, 'cache', "#{@spec.full_name}.gem"))
+    assert File.exist?(File.join(@gemhome, 'specifications',
+                                 "#{@spec.full_name}.gemspec"))
+  end
+
+  def test_install_with_message
+    @spec.post_install_message = 'I am a shiny gem!'
+
+    use_ui @ui do
+      Dir.chdir @tempdir do Gem::Builder.new(@spec).build end
+
+      @installer.install
+    end
+
+    assert_match %r|I am a shiny gem!|, @ui.output
+  end
+
+  def test_install_writable
+    util_setup_gem
+
+    orig_mode = File.stat(Gem.dir).mode
+    File.chmod 0000, Gem.dir
+
+    e = assert_raise Gem::FilePermissionError do
+      @installer.install
+    end
+
+    assert_equal "You don't have write permissions into the #{@gemhome} directory.",
+                 e.message
+  ensure
+    File.chmod orig_mode, Gem.dir
+  end
+
+  def test_install_wrong_ruby_version
+    use_ui @ui do
+      installer = Gem::Installer.new old_ruby_required
+      e = assert_raise Gem::InstallError do
+        installer.install
+      end
+      assert_equal 'old_ruby_required requires Ruby version = 1.4.6',
+                   e.message
+    end
+  end
+
+  def test_install_wrong_rubygems_version
+    spec = quick_gem 'old_rubygems_required', '0.0.1' do |s|
+      s.required_rubygems_version = '< 0.0.0'
+    end
+
+    util_build_gem spec
+
+    gem = File.join @gemhome, 'cache', "#{spec.full_name}.gem"
+
+    use_ui @ui do
+      @installer = Gem::Installer.new gem
+      e = assert_raise Gem::InstallError do
+        @installer.install
+      end
+      assert_equal 'old_rubygems_required requires RubyGems version < 0.0.0',
+                   e.message
+    end
+  end
+
+  def test_installation_satisfies_dependency_eh
+    dep = Gem::Dependency.new 'a', '>= 0.0.2'
+    assert @installer.installation_satisfies_dependency?(dep)
+
+    dep = Gem::Dependency.new 'a', '> 0.0.2'
+    assert ! @installer.installation_satisfies_dependency?(dep)
+  end
+
+  def test_shebang
+    util_make_exec '0.0.2', "#!/usr/bin/ruby"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_arguments
+    util_make_exec '0.0.2', "#!/usr/bin/ruby -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_shebang_empty
+    util_make_exec '0.0.2', ''
+
+    shebang = @installer.shebang 'my_exec'
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_env
+    util_make_exec '0.0.2', "#!/usr/bin/env ruby"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_env_arguments
+    util_make_exec '0.0.2', "#!/usr/bin/env ruby -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_shebang_env_shebang
+    util_make_exec '0.0.2', ''
+    @installer.env_shebang = true
+
+    shebang = @installer.shebang 'my_exec'
+    assert_equal "#!/usr/bin/env ruby", shebang
+  end
+
+  def test_shebang_nested
+    util_make_exec '0.0.2', "#!/opt/local/ruby/bin/ruby"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_nested_arguments
+    util_make_exec '0.0.2', "#!/opt/local/ruby/bin/ruby -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_shebang_version
+    util_make_exec '0.0.2', "#!/usr/bin/ruby18"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_version_arguments
+    util_make_exec '0.0.2', "#!/usr/bin/ruby18 -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_shebang_version_env
+    util_make_exec '0.0.2', "#!/usr/bin/env ruby18"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_version_env_arguments
+    util_make_exec '0.0.2', "#!/usr/bin/env ruby18 -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_unpack
+    util_setup_gem
+
+    dest = File.join @gemhome, 'gems', @spec.full_name
+
+    @installer.unpack dest
+
+    assert File.exist?(File.join(dest, 'lib', 'code.rb'))
+    assert File.exist?(File.join(dest, 'bin', 'executable'))
+  end
+
+  def test_write_spec
+    spec_dir = File.join @gemhome, 'specifications'
+    spec_file = File.join spec_dir, "#{@spec.full_name}.gemspec"
+    FileUtils.rm spec_file
+    assert !File.exist?(spec_file)
+
+    @installer.spec = @spec
+    @installer.gem_home = @gemhome
+
+    @installer.write_spec
+
+    assert File.exist?(spec_file)
+    assert_equal @spec, eval(File.read(spec_file))
+  end
+
+  def old_ruby_required
+    spec = quick_gem 'old_ruby_required', '0.0.1' do |s|
+      s.required_ruby_version = '= 1.4.6'
+    end
+
+    util_build_gem spec
+
+    File.join @gemhome, 'cache', "#{spec.full_name}.gem"
+  end
+
+  def util_setup_gem
+    @spec.files = File.join('lib', 'code.rb')
+    @spec.executables << 'executable'
+    @spec.extensions << File.join('ext', 'a', 'mkrf_conf.rb')
+
+    Dir.chdir @tempdir do
+      FileUtils.mkdir_p 'bin'
+      FileUtils.mkdir_p 'lib'
+      FileUtils.mkdir_p File.join('ext', 'a')
+      File.open File.join('bin', 'executable'), 'w' do |f| f.puts '1' end
+      File.open File.join('lib', 'code.rb'), 'w' do |f| f.puts '1' end
+      File.open File.join('ext', 'a', 'mkrf_conf.rb'), 'w' do |f|
+        f << <<-EOF
+          File.open 'Rakefile', 'w' do |rf| rf.puts "task :default" end
+        EOF
+      end
+
+      use_ui @ui do
+        FileUtils.rm @gem
+        Gem::Builder.new(@spec).build
+      end
+    end
+
+    @installer = Gem::Installer.new @gem
+  end
+
+end
+
+