Merge RubyGems 3.1.4

26 files changed, 372 insertions, 119 deletions

diff --git a/lib/rubygems.rb b/lib/rubygems.rb
index 57cb70cc2b..94242a1310 100644
--- a/lib/rubygems.rb
+++ b/lib/rubygems.rb
@@ -9,7 +9,7 @@
 require 'rbconfig'
 
 module Gem
-  VERSION = "3.1.2".freeze
+  VERSION = "3.1.4".freeze
 end
 
 # Must be first since it unloads the prelude from 1.9.2
@@ -26,19 +26,19 @@ require 'rubygems/errors'
 # For user documentation, see:
 #
 # * <tt>gem help</tt> and <tt>gem help [command]</tt>
-# * {RubyGems User Guide}[http://guides.rubygems.org/]
-# * {Frequently Asked Questions}[http://guides.rubygems.org/faqs]
+# * {RubyGems User Guide}[https://guides.rubygems.org/]
+# * {Frequently Asked Questions}[https://guides.rubygems.org/faqs]
 #
 # For gem developer documentation see:
 #
-# * {Creating Gems}[http://guides.rubygems.org/make-your-own-gem]
+# * {Creating Gems}[https://guides.rubygems.org/make-your-own-gem]
 # * Gem::Specification
 # * Gem::Version for version dependency notes
 #
 # Further RubyGems documentation can be found at:
 #
-# * {RubyGems Guides}[http://guides.rubygems.org]
-# * {RubyGems API}[http://www.rubydoc.info/github/rubygems/rubygems] (also available from
+# * {RubyGems Guides}[https://guides.rubygems.org]
+# * {RubyGems API}[https://www.rubydoc.info/github/rubygems/rubygems] (also available from
 #   <tt>gem server</tt>)
 #
 # == RubyGems Plugins
@@ -189,6 +189,8 @@ module Gem
   @pre_reset_hooks      ||= []
   @post_reset_hooks     ||= []
 
+  @default_source_date_epoch = nil
+
   ##
   # Try to activate a gem containing +path+. Returns true if
   # activation succeeded or wasn't needed because it was already
@@ -1236,20 +1238,43 @@ An Array (#{env.inspect}) was passed in from #{caller[3]}
   end
 
   ##
-  # The SOURCE_DATE_EPOCH environment variable (or, if that's not set, the current time), converted to Time object.
-  # This is used throughout RubyGems for enabling reproducible builds.
+  # If the SOURCE_DATE_EPOCH environment variable is set, returns it's value.
+  # Otherwise, returns the time that `Gem.source_date_epoch_string` was
+  # first called in the same format as SOURCE_DATE_EPOCH.
   #
-  # If it is not set as an environment variable already, this also sets it.
+  # NOTE(@duckinator): The implementation is a tad weird because we want to:
+  #   1. Make builds reproducible by default, by having this function always
+  #      return the same result during a given run.
+  #   2. Allow changing ENV['SOURCE_DATE_EPOCH'] at runtime, since multiple
+  #      tests that set this variable will be run in a single process.
+  #
+  # If you simplify this function and a lot of tests fail, that is likely
+  # due to #2 above.
   #
   # Details on SOURCE_DATE_EPOCH:
   # https://reproducible-builds.org/specs/source-date-epoch/
 
-  def self.source_date_epoch
-    if ENV["SOURCE_DATE_EPOCH"].nil? || ENV["SOURCE_DATE_EPOCH"].empty?
-      ENV["SOURCE_DATE_EPOCH"] = Time.now.to_i.to_s
-    end
+  def self.source_date_epoch_string
+    # The value used if $SOURCE_DATE_EPOCH is not set.
+    @default_source_date_epoch ||= Time.now.to_i.to_s
+
+    specified_epoch = ENV["SOURCE_DATE_EPOCH"]
+
+    # If it's empty or just whitespace, treat it like it wasn't set at all.
+    specified_epoch = nil if !specified_epoch.nil? && specified_epoch.strip.empty?
+
+    epoch = specified_epoch || @default_source_date_epoch
 
-    Time.at(ENV["SOURCE_DATE_EPOCH"].to_i).utc.freeze
+    epoch.strip
+  end
+
+  ##
+  # Returns the value of Gem.source_date_epoch_string, as a Time object.
+  #
+  # This is used throughout RubyGems for enabling reproducible builds.
+
+  def self.source_date_epoch
+    Time.at(self.source_date_epoch_string.to_i).utc.freeze
   end
 
   # FIX: Almost everywhere else we use the `def self.` way of defining class
@@ -1281,10 +1306,11 @@ An Array (#{env.inspect}) was passed in from #{caller[3]}
     #
 
     def register_default_spec(spec)
-      new_format = spec.require_paths.any? {|path| spec.files.any? {|f| f.start_with? path } }
+      extended_require_paths = spec.require_paths.map {|f| f + "/"}
+      new_format = extended_require_paths.any? {|path| spec.files.any? {|f| f.start_with? path } }
 
       if new_format
-        prefix_group = spec.require_paths.map {|f| f + "/"}.join("|")
+        prefix_group = extended_require_paths.join("|")
         prefix_pattern = /^(#{prefix_group})/
       end
 
@@ -1366,23 +1392,24 @@ An Array (#{env.inspect}) was passed in from #{caller[3]}
 
   MARSHAL_SPEC_DIR = "quick/Marshal.#{Gem.marshal_version}/".freeze
 
-  autoload :BundlerVersionFinder, 'rubygems/bundler_version_finder'
-  autoload :ConfigFile,         'rubygems/config_file'
-  autoload :Dependency,         'rubygems/dependency'
-  autoload :DependencyList,     'rubygems/dependency_list'
-  autoload :Installer,          'rubygems/installer'
-  autoload :Licenses,           'rubygems/util/licenses'
-  autoload :PathSupport,        'rubygems/path_support'
-  autoload :Platform,           'rubygems/platform'
-  autoload :RequestSet,         'rubygems/request_set'
-  autoload :Requirement,        'rubygems/requirement'
-  autoload :Resolver,           'rubygems/resolver'
-  autoload :Source,             'rubygems/source'
-  autoload :SourceList,         'rubygems/source_list'
-  autoload :SpecFetcher,        'rubygems/spec_fetcher'
-  autoload :Specification,      'rubygems/specification'
-  autoload :Util,               'rubygems/util'
-  autoload :Version,            'rubygems/version'
+  autoload :BundlerVersionFinder, File.expand_path('rubygems/bundler_version_finder', __dir__)
+  autoload :ConfigFile,         File.expand_path('rubygems/config_file', __dir__)
+  autoload :Dependency,         File.expand_path('rubygems/dependency', __dir__)
+  autoload :DependencyList,     File.expand_path('rubygems/dependency_list', __dir__)
+  autoload :Installer,          File.expand_path('rubygems/installer', __dir__)
+  autoload :Licenses,           File.expand_path('rubygems/util/licenses', __dir__)
+  autoload :NameTuple,          File.expand_path('rubygems/name_tuple', __dir__)
+  autoload :PathSupport,        File.expand_path('rubygems/path_support', __dir__)
+  autoload :Platform,           File.expand_path('rubygems/platform', __dir__)
+  autoload :RequestSet,         File.expand_path('rubygems/request_set', __dir__)
+  autoload :Requirement,        File.expand_path('rubygems/requirement', __dir__)
+  autoload :Resolver,           File.expand_path('rubygems/resolver', __dir__)
+  autoload :Source,             File.expand_path('rubygems/source', __dir__)
+  autoload :SourceList,         File.expand_path('rubygems/source_list', __dir__)
+  autoload :SpecFetcher,        File.expand_path('rubygems/spec_fetcher', __dir__)
+  autoload :Specification,      File.expand_path('rubygems/specification', __dir__)
+  autoload :Util,               File.expand_path('rubygems/util', __dir__)
+  autoload :Version,            File.expand_path('rubygems/version', __dir__)
 
   require "rubygems/specification"
 end
diff --git a/lib/rubygems/basic_specification.rb b/lib/rubygems/basic_specification.rb
index c6d63ac473..339953eb29 100644
--- a/lib/rubygems/basic_specification.rb
+++ b/lib/rubygems/basic_specification.rb
@@ -78,7 +78,7 @@ class Gem::BasicSpecification
     elsif missing_extensions?
       @ignored = true
 
-      if RUBY_ENGINE == platform || Gem::Platform.local === platform
+      if Gem::Platform::RUBY == platform || Gem::Platform.local === platform
         warn "Ignoring #{full_name} because its extensions are not built. " +
           "Try: gem pristine #{name} --version #{version}"
       end
diff --git a/lib/rubygems/command.rb b/lib/rubygems/command.rb
index c1e5e13c5a..32ec0f8ba6 100644
--- a/lib/rubygems/command.rb
+++ b/lib/rubygems/command.rb
@@ -646,7 +646,7 @@ basic help message containing pointers to more information.
                                  http://localhost:8808/
                                  with info about installed gems
   Further information:
-    http://guides.rubygems.org
+    https://guides.rubygems.org
   HELP
 
   # :startdoc:
diff --git a/lib/rubygems/commands/help_command.rb b/lib/rubygems/commands/help_command.rb
index 9f14e22f90..259e8b5622 100644
--- a/lib/rubygems/commands/help_command.rb
+++ b/lib/rubygems/commands/help_command.rb
@@ -38,7 +38,7 @@ Some examples of 'gem' usage.
 
 * Create a gem:
 
-    See http://guides.rubygems.org/make-your-own-gem/
+    See https://guides.rubygems.org/make-your-own-gem/
 
 * See information about RubyGems:
 
diff --git a/lib/rubygems/commands/sources_command.rb b/lib/rubygems/commands/sources_command.rb
index feab23237d..ca9d425232 100644
--- a/lib/rubygems/commands/sources_command.rb
+++ b/lib/rubygems/commands/sources_command.rb
@@ -136,7 +136,7 @@ RubyGems has been configured to serve gems via the following URLs through
 its history:
 
 * http://gems.rubyforge.org (RubyGems 1.3.6 and earlier)
-* http://rubygems.org       (RubyGems 1.3.7 through 1.8.25)
+* https://rubygems.org/       (RubyGems 1.3.7 through 1.8.25)
 * https://rubygems.org      (RubyGems 2.0.1 and newer)
 
 Since all of these sources point to the same set of gems you only need one
@@ -153,8 +153,8 @@ before it is added.
 
 To remove a source use the --remove argument:
 
-    $ gem sources --remove http://rubygems.org
-    http://rubygems.org removed from sources
+    $ gem sources --remove https://rubygems.org/
+    https://rubygems.org/ removed from sources
 
     EOF
   end
diff --git a/lib/rubygems/commands/uninstall_command.rb b/lib/rubygems/commands/uninstall_command.rb
index 68e048c010..c1a9dbba32 100644
--- a/lib/rubygems/commands/uninstall_command.rb
+++ b/lib/rubygems/commands/uninstall_command.rb
@@ -143,7 +143,7 @@ that is a dependency of an existing gem.  You can use the
       uninstall_gem spec.name
     end
 
-    alert "Uninstalled all gems in #{options[:install_dir]}"
+    alert "Uninstalled all gems in #{options[:install_dir] || Gem.dir}"
   end
 
   def uninstall_specific
diff --git a/lib/rubygems/ext/builder.rb b/lib/rubygems/ext/builder.rb
index 2fc1074d92..a8bd4c8d1b 100644
--- a/lib/rubygems/ext/builder.rb
+++ b/lib/rubygems/ext/builder.rb
@@ -68,7 +68,9 @@ class Gem::Ext::Builder
       results << (command.respond_to?(:shelljoin) ? command.shelljoin : command)
 
       require "open3"
-      output, status = Open3.capture2e(*command)
+      # Set $SOURCE_DATE_EPOCH for the subprocess.
+      env = {'SOURCE_DATE_EPOCH' => Gem.source_date_epoch_string}
+      output, status = Open3.capture2e(env, *command)
       if verbose
         puts output
       else
diff --git a/lib/rubygems/request_set/gem_dependency_api.rb b/lib/rubygems/request_set/gem_dependency_api.rb
index b7a8ee6f4f..ef3f302ea8 100644
--- a/lib/rubygems/request_set/gem_dependency_api.rb
+++ b/lib/rubygems/request_set/gem_dependency_api.rb
@@ -235,7 +235,7 @@ class Gem::RequestSet::GemDependencyAPI
     return unless (groups & @without_groups).empty?
 
     dependencies.each do |dep|
-      @set.gem dep.name, *dep.requirement
+      @set.gem dep.name, *dep.requirement.as_list
     end
   end
 
diff --git a/lib/rubygems/resolver/api_set.rb b/lib/rubygems/resolver/api_set.rb
index 6fd91e3b73..135f1b08aa 100644
--- a/lib/rubygems/resolver/api_set.rb
+++ b/lib/rubygems/resolver/api_set.rb
@@ -23,7 +23,7 @@ class Gem::Resolver::APISet < Gem::Resolver::Set
   ##
   # Creates a new APISet that will retrieve gems from +uri+ using the RubyGems
   # API URL +dep_uri+ which is described at
-  # http://guides.rubygems.org/rubygems-org-api
+  # https://guides.rubygems.org/rubygems-org-api
 
   def initialize(dep_uri = 'https://rubygems.org/api/v1/dependencies')
     super()
diff --git a/lib/rubygems/resolver/api_specification.rb b/lib/rubygems/resolver/api_specification.rb
index 9bbc095788..4052846e99 100644
--- a/lib/rubygems/resolver/api_specification.rb
+++ b/lib/rubygems/resolver/api_specification.rb
@@ -11,7 +11,7 @@ class Gem::Resolver::APISpecification < Gem::Resolver::Specification
   # Creates an APISpecification for the given +set+ from the rubygems.org
   # +api_data+.
   #
-  # See http://guides.rubygems.org/rubygems-org-api/#misc_methods for the
+  # See https://guides.rubygems.org/rubygems-org-api/#misc_methods for the
   # format of the +api_data+.
 
   def initialize(set, api_data)
diff --git a/lib/rubygems/server.rb b/lib/rubygems/server.rb
index 97923ef698..83d7cf5abc 100644
--- a/lib/rubygems/server.rb
+++ b/lib/rubygems/server.rb
@@ -661,7 +661,7 @@ div.method-source-code pre { color: #ffdead; overflow: hidden; }
       "only_one_executable" => true,
       "full_name" => "rubygems-#{Gem::VERSION}",
       "has_deps" => false,
-      "homepage" => "http://guides.rubygems.org/",
+      "homepage" => "https://guides.rubygems.org/",
       "name" => 'rubygems',
       "ri_installed" => true,
       "summary" => "RubyGems itself",
diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index 5321edfcc3..f925480f88 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -193,6 +193,12 @@ class Gem::Specification < Gem::BasicSpecification
   @@spec_with_requirable_file = {}
   @@active_stub_with_requirable_file = {}
 
+  # Tracking removed method calls to warn users during build time.
+  REMOVED_METHODS = [:rubyforge_project=].freeze # :nodoc:
+  def removed_method_calls
+    @removed_method_calls ||= []
+  end
+
   ######################################################################
   # :section: Required gemspec attributes
 
@@ -727,14 +733,6 @@ class Gem::Specification < Gem::BasicSpecification
   attr_writer :original_platform # :nodoc:
 
   ##
-  # Deprecated and ignored.
-  #
-  # Formerly used to set rubyforge project.
-
-  attr_writer :rubyforge_project
-  deprecate :rubyforge_project=, :none,       2019, 12
-
-  ##
   # The Gem::Specification version of this gemspec.
   #
   # Do not set this, it is set automatically when the gem is packaged.
@@ -2107,9 +2105,15 @@ class Gem::Specification < Gem::BasicSpecification
   end
 
   ##
+  # Track removed method calls to warn about during build time.
   # Warn about unknown attributes while loading a spec.
 
   def method_missing(sym, *a, &b) # :nodoc:
+    if REMOVED_METHODS.include?(sym)
+      removed_method_calls << sym
+      return
+    end
+
     if @specification_version > CURRENT_SPECIFICATION_VERSION and
       sym.to_s =~ /=$/
       warn "ignoring #{sym} loading #{full_name}" if $DEBUG
diff --git a/lib/rubygems/specification_policy.rb b/lib/rubygems/specification_policy.rb
index c3c496db9b..b7fb2cfa1a 100644
--- a/lib/rubygems/specification_policy.rb
+++ b/lib/rubygems/specification_policy.rb
@@ -75,6 +75,8 @@ class Gem::SpecificationPolicy
 
     validate_dependencies
 
+    validate_removed_attributes
+
     if @warnings > 0
       if strict
         error "specification has warnings"
@@ -408,6 +410,12 @@ http://spdx.org/licenses or '#{Gem::Licenses::NONSTANDARD}' for a nonstandard li
     warning "#{executable_path} is missing #! line"
   end
 
+  def validate_removed_attributes # :nodoc:
+    @specification.removed_method_calls.each do |attr|
+      warning("#{attr} is deprecated and ignored. Please remove this from your gemspec to ensure that your gem continues to build in the future.")
+    end
+  end
+
   def warning(statement) # :nodoc:
     @warnings += 1
 
@@ -421,7 +429,7 @@ http://spdx.org/licenses or '#{Gem::Licenses::NONSTANDARD}' for a nonstandard li
   end
 
   def help_text # :nodoc:
-    "See http://guides.rubygems.org/specification-reference/ for help"
+    "See https://guides.rubygems.org/specification-reference/ for help"
   end
 
 end
diff --git a/lib/rubygems/test_case.rb b/lib/rubygems/test_case.rb
index 206497c651..89403206f9 100644
--- a/lib/rubygems/test_case.rb
+++ b/lib/rubygems/test_case.rb
@@ -96,6 +96,8 @@ class Gem::TestCase < (defined?(Minitest::Test) ? Minitest::Test : MiniTest::Uni
 
   TEST_PATH = ENV.fetch('RUBYGEMS_TEST_PATH', File.expand_path('../../../test/rubygems', __FILE__))
 
+  SPECIFICATIONS = File.expand_path(File.join(TEST_PATH, "specifications"), __FILE__)
+
   def assert_activate(expected, *specs)
     specs.each do |spec|
       case spec
@@ -169,20 +171,24 @@ class Gem::TestCase < (defined?(Minitest::Test) ? Minitest::Test : MiniTest::Uni
   # original value when the block ends
   #
   def bindir(value)
-    bindir = RbConfig::CONFIG['bindir']
+    with_clean_path_to_ruby do
+      bindir = RbConfig::CONFIG['bindir']
 
-    if value
-      RbConfig::CONFIG['bindir'] = value
-    else
-      RbConfig::CONFIG.delete 'bindir'
-    end
+      if value
+        RbConfig::CONFIG['bindir'] = value
+      else
+        RbConfig::CONFIG.delete 'bindir'
+      end
 
-    yield
-  ensure
-    if bindir
-      RbConfig::CONFIG['bindir'] = bindir
-    else
-      RbConfig::CONFIG.delete 'bindir'
+      begin
+        yield
+      ensure
+        if bindir
+          RbConfig::CONFIG['bindir'] = bindir
+        else
+          RbConfig::CONFIG.delete 'bindir'
+        end
+      end
     end
   end
 
@@ -1247,6 +1253,16 @@ Also, a list:
     end
   end
 
+  def with_clean_path_to_ruby
+    orig_ruby = Gem.ruby
+
+    Gem.instance_variable_set :@ruby, nil
+
+    yield
+  ensure
+    Gem.instance_variable_set :@ruby, orig_ruby
+  end
+
   class << self
 
     # :nodoc:
diff --git a/lib/rubygems/util.rb b/lib/rubygems/util.rb
index b5f1408401..7fc239af9a 100644
--- a/lib/rubygems/util.rb
+++ b/lib/rubygems/util.rb
@@ -14,7 +14,13 @@ module Gem::Util
     require 'stringio'
     data = StringIO.new(data, 'r')
 
-    unzipped = Zlib::GzipReader.new(data).read
+    gzip_reader = begin
+                    Zlib::GzipReader.new(data)
+                  rescue Zlib::GzipFile::Error => e
+                    raise e.class, e.inspect, e.backtrace
+                  end
+
+    unzipped = gzip_reader.read
     unzipped.force_encoding Encoding::BINARY
     unzipped
   end
diff --git a/lib/rubygems/version.rb b/lib/rubygems/version.rb
index 6524faf5c8..b1faedcda2 100644
--- a/lib/rubygems/version.rb
+++ b/lib/rubygems/version.rb
@@ -151,7 +151,7 @@
 
 class Gem::Version
 
-  autoload :Requirement, 'rubygems/requirement'
+  autoload :Requirement, File.expand_path('requirement', __dir__)
 
   include Comparable
 
diff --git a/test/rubygems/specifications/rubyforge-0.0.1.gemspec b/test/rubygems/specifications/rubyforge-0.0.1.gemspec
new file mode 100644
index 0000000000..0df2c4c379
--- /dev/null
+++ b/test/rubygems/specifications/rubyforge-0.0.1.gemspec
@@ -0,0 +1,14 @@
+# -*- encoding: utf-8 -*-
+
+Gem::Specification.new do |s|
+  s.name              = "rubyforge"
+  s.version           = "0.0.1"
+  s.platform          = "ruby"
+  s.require_paths     = ["lib"]
+  s.summary           = "A very bar gem"
+  s.authors           = ["unknown"]
+  s.license           = 'MIT'
+  s.homepage          = 'http://example.com'
+  s.files             = ['README.md']
+  s.rubyforge_project = 'abc'
+end
diff --git a/test/rubygems/test_gem.rb b/test/rubygems/test_gem.rb
index 6d223b7d69..b5d399f972 100644
--- a/test/rubygems/test_gem.rb
+++ b/test/rubygems/test_gem.rb
@@ -161,10 +161,8 @@ class TestGem < Gem::TestCase
 
   def test_self_install_permissions_with_format_executable_and_non_standard_ruby_install_name
     Gem::Installer.exec_format = nil
-    with_clean_path_to_ruby do
-      ruby_install_name 'ruby27' do
-        assert_self_install_permissions(format_executable: true)
-      end
+    ruby_install_name 'ruby27' do
+      assert_self_install_permissions(format_executable: true)
     end
   ensure
     Gem::Installer.exec_format = nil
@@ -310,6 +308,21 @@ class TestGem < Gem::TestCase
     assert_equal %w(a-1 b-2 c-1), loaded_spec_names
   end
 
+  def test_activate_bin_path_in_debug_mode
+    a1 = util_spec 'a', '1' do |s|
+      s.executables = ['exec']
+    end
+
+    install_specs a1
+
+    output, status = Open3.capture2e(
+      { "GEM_HOME" => Gem.paths.home, "DEBUG_RESOLVER" => "1" },
+      Gem.ruby, "-I", File.expand_path("../../lib", __dir__), "-e", "\"Gem.activate_bin_path('a', 'exec', '>= 0')\""
+    )
+
+    assert status.success?, output
+  end
+
   def test_activate_bin_path_gives_proper_error_for_bundler
     bundler = util_spec 'bundler', '2' do |s|
       s.executables = ['bundle']
@@ -1024,21 +1037,17 @@ class TestGem < Gem::TestCase
   end
 
   def test_self_ruby_escaping_spaces_in_path
-    with_clean_path_to_ruby do
-      with_bindir_and_exeext("C:/Ruby 1.8/bin", ".exe") do
-        ruby_install_name "ruby" do
-          assert_equal "\"C:/Ruby 1.8/bin/ruby.exe\"", Gem.ruby
-        end
+    with_bindir_and_exeext("C:/Ruby 1.8/bin", ".exe") do
+      ruby_install_name "ruby" do
+        assert_equal "\"C:/Ruby 1.8/bin/ruby.exe\"", Gem.ruby
       end
     end
   end
 
   def test_self_ruby_path_without_spaces
-    with_clean_path_to_ruby do
-      with_bindir_and_exeext("C:/Ruby18/bin", ".exe") do
-        ruby_install_name "ruby" do
-          assert_equal "C:/Ruby18/bin/ruby.exe", Gem.ruby
-        end
+    with_bindir_and_exeext("C:/Ruby18/bin", ".exe") do
+      ruby_install_name "ruby" do
+        assert_equal "C:/Ruby18/bin/ruby.exe", Gem.ruby
       end
     end
   end
@@ -1090,7 +1099,7 @@ class TestGem < Gem::TestCase
     util_restore_RUBY_VERSION
   end
 
-  def test_self_ruby_version_with_prerelease
+  def test_self_ruby_version_with_svn_prerelease
     util_set_RUBY_VERSION '2.6.0', -1, 63539, 'ruby 2.6.0preview2 (2018-05-31 trunk 63539) [x86_64-linux]'
 
     assert_equal Gem::Version.new('2.6.0.preview2'), Gem.ruby_version
@@ -1098,6 +1107,14 @@ class TestGem < Gem::TestCase
     util_restore_RUBY_VERSION
   end
 
+  def test_self_ruby_version_with_git_prerelease
+    util_set_RUBY_VERSION '2.7.0', -1, 'b563439274a402e33541f5695b1bfd4ac1085638', 'ruby 2.7.0preview3 (2019-11-23 master b563439274) [x86_64-linux]'
+
+    assert_equal Gem::Version.new('2.7.0.preview3'), Gem.ruby_version
+  ensure
+    util_restore_RUBY_VERSION
+  end
+
   def test_self_ruby_version_with_non_mri_implementations_with_mri_prerelase_compatibility
     util_set_RUBY_VERSION '2.6.0', -1, 63539, 'weirdjruby 9.2.0.0 (2.6.0preview2) 2018-05-24 81156a8 OpenJDK 64-Bit Server VM 25.171-b11 on 1.8.0_171-8u171-b11-0ubuntu0.16.04.1-b11 [linux-x86_64]', 'weirdjruby', '9.2.0.0'
 
@@ -1106,7 +1123,7 @@ class TestGem < Gem::TestCase
     util_restore_RUBY_VERSION
   end
 
-  def test_self_ruby_version_with_trunk
+  def test_self_ruby_version_with_svn_trunk
     util_set_RUBY_VERSION '1.9.2', -1, 23493, 'ruby 1.9.2dev (2009-05-20 trunk 23493) [x86_64-linux]'
 
     assert_equal Gem::Version.new('1.9.2.dev'), Gem.ruby_version
@@ -1114,6 +1131,14 @@ class TestGem < Gem::TestCase
     util_restore_RUBY_VERSION
   end
 
+  def test_self_ruby_version_with_git_master
+    util_set_RUBY_VERSION '2.7.0', -1, '5de284ec78220e75643f89b454ce999da0c1c195', 'ruby 2.7.0dev (2019-12-23T01:37:30Z master 5de284ec78) [x86_64-linux]'
+
+    assert_equal Gem::Version.new('2.7.0.dev'), Gem.ruby_version
+  ensure
+    util_restore_RUBY_VERSION
+  end
+
   def test_self_rubygems_version
     assert_equal Gem::Version.new(Gem::VERSION), Gem.rubygems_version
   end
@@ -1731,6 +1756,18 @@ class TestGem < Gem::TestCase
     assert_nil              Gem.find_unresolved_default_spec("README")
   end
 
+  def test_register_default_spec_old_style_with_folder_starting_with_lib
+    Gem.clear_default_specs
+
+    old_style = Gem::Specification.new do |spec|
+      spec.files = ["libexec/bundle", "foo.rb", "bar.rb"]
+    end
+
+    Gem.register_default_spec old_style
+
+    assert_equal old_style, Gem.find_unresolved_default_spec("foo.rb")
+  end
+
   def test_use_gemdeps
     gem_deps_file = 'gem.deps.rb'.tap(&Gem::UNTAINT)
     spec = util_spec 'a', 1
@@ -1903,16 +1940,38 @@ You may need to `gem install -g` to install missing gems
     assert platform_defaults.is_a? Hash
   end
 
-  def ruby_install_name(name)
-    orig_RUBY_INSTALL_NAME = RbConfig::CONFIG['ruby_install_name']
-    RbConfig::CONFIG['ruby_install_name'] = name
+  # Ensure that `Gem.source_date_epoch` is consistent even if
+  # $SOURCE_DATE_EPOCH has not been set.
+  def test_default_source_date_epoch_doesnt_change
+    old_epoch = ENV['SOURCE_DATE_EPOCH']
+    ENV['SOURCE_DATE_EPOCH'] = nil
 
-    yield
+    # Unfortunately, there is no real way to test this aside from waiting
+    # enough for `Time.now.to_i` to change -- which is a whole second.
+    #
+    # Fortunately, we only need to do this once.
+    a = Gem.source_date_epoch
+    sleep 1
+    b = Gem.source_date_epoch
+    assert_equal a, b
   ensure
-    if orig_RUBY_INSTALL_NAME
-      RbConfig::CONFIG['ruby_install_name'] = orig_RUBY_INSTALL_NAME
-    else
-      RbConfig::CONFIG.delete 'ruby_install_name'
+    ENV['SOURCE_DATE_EPOCH'] = old_epoch
+  end
+
+  def ruby_install_name(name)
+    with_clean_path_to_ruby do
+      orig_RUBY_INSTALL_NAME = RbConfig::CONFIG['ruby_install_name']
+      RbConfig::CONFIG['ruby_install_name'] = name
+
+      begin
+        yield
+      ensure
+        if orig_RUBY_INSTALL_NAME
+          RbConfig::CONFIG['ruby_install_name'] = orig_RUBY_INSTALL_NAME
+        else
+          RbConfig::CONFIG.delete 'ruby_install_name'
+        end
+      end
     end
   end
 
@@ -1924,16 +1983,6 @@ You may need to `gem install -g` to install missing gems
     end
   end
 
-  def with_clean_path_to_ruby
-    orig_ruby = Gem.ruby
-
-    Gem.instance_variable_set :@ruby, nil
-
-    yield
-  ensure
-    Gem.instance_variable_set :@ruby, orig_ruby
-  end
-
   def with_plugin(path)
     test_plugin_path = File.expand_path("test/rubygems/plugin/#{path}",
                                         PROJECT_DIR)
diff --git a/test/rubygems/test_gem_commands_build_command.rb b/test/rubygems/test_gem_commands_build_command.rb
index 50c447e2eb..309e15f859 100644
--- a/test/rubygems/test_gem_commands_build_command.rb
+++ b/test/rubygems/test_gem_commands_build_command.rb
@@ -122,6 +122,23 @@ class TestGemCommandsBuildCommand < Gem::TestCase
     util_test_build_gem @gem
   end
 
+  def test_execute_rubyforge_project_warning
+    rubyforge_gemspec = File.join SPECIFICATIONS, "rubyforge-0.0.1.gemspec"
+
+    @cmd.options[:args] = [rubyforge_gemspec]
+
+    use_ui @ui do
+      Dir.chdir @tempdir do
+        @cmd.execute
+      end
+    end
+
+    error = @ui.error.split("\n")
+    assert_equal "WARNING:  rubyforge_project= is deprecated and ignored. Please remove this from your gemspec to ensure that your gem continues to build in the future.", error.shift
+    assert_equal "WARNING:  See https://guides.rubygems.org/specification-reference/ for help", error.shift
+    assert_equal [], error
+  end
+
   def test_execute_strict_with_warnings
     bad_gem = util_spec 'some_bad_gem' do |s|
       s.files = ['README.md']
@@ -147,7 +164,7 @@ class TestGemCommandsBuildCommand < Gem::TestCase
     error = @ui.error.split "\n"
     assert_equal "WARNING:  licenses is empty, but is recommended.  Use a license identifier from", error.shift
     assert_equal "http://spdx.org/licenses or 'Nonstandard' for a nonstandard license.", error.shift
-    assert_equal "WARNING:  See http://guides.rubygems.org/specification-reference/ for help", error.shift
+    assert_equal "WARNING:  See https://guides.rubygems.org/specification-reference/ for help", error.shift
     assert_equal [], error
 
     gem_file = File.join @tempdir, File.basename(@gem.cache_file)
diff --git a/test/rubygems/test_gem_commands_sources_command.rb b/test/rubygems/test_gem_commands_sources_command.rb
index b63fbce81f..3a0899245b 100644
--- a/test/rubygems/test_gem_commands_sources_command.rb
+++ b/test/rubygems/test_gem_commands_sources_command.rb
@@ -247,7 +247,7 @@ source http://gems.example.com/ already present in the cache
   end
 
   def test_execute_add_http_rubygems_org
-    http_rubygems_org = 'http://rubygems.org'
+    http_rubygems_org = 'http://rubygems.org/'
 
     spec_fetcher do |fetcher|
       fetcher.spec 'a', 1
@@ -284,6 +284,44 @@ source http://gems.example.com/ already present in the cache
     assert_empty @ui.error
   end
 
+  def test_execute_add_https_rubygems_org
+    https_rubygems_org = 'https://rubygems.org/'
+
+    spec_fetcher do |fetcher|
+      fetcher.spec 'a', 1
+    end
+
+    specs = Gem::Specification.map do |spec|
+      [spec.name, spec.version, spec.original_platform]
+    end
+
+    specs_dump_gz = StringIO.new
+    Zlib::GzipWriter.wrap specs_dump_gz do |io|
+      Marshal.dump specs, io
+    end
+
+    @fetcher.data["#{https_rubygems_org}/specs.#{@marshal_version}.gz"] =
+      specs_dump_gz.string
+
+    @cmd.handle_options %W[--add #{https_rubygems_org}]
+
+    ui = Gem::MockGemUi.new "n"
+
+    use_ui ui do
+      assert_raises Gem::MockGemUi::TermError do
+        @cmd.execute
+      end
+    end
+
+    assert_equal [@gem_repo], Gem.sources
+
+    expected = <<-EXPECTED
+    EXPECTED
+
+    assert_equal expected, @ui.output
+    assert_empty @ui.error
+  end
+
   def test_execute_add_bad_uri
     @cmd.handle_options %w[--add beta-gems.example.com]
 
diff --git a/test/rubygems/test_gem_commands_uninstall_command.rb b/test/rubygems/test_gem_commands_uninstall_command.rb
index 927a241203..c3582390f9 100644
--- a/test/rubygems/test_gem_commands_uninstall_command.rb
+++ b/test/rubygems/test_gem_commands_uninstall_command.rb
@@ -361,6 +361,7 @@ class TestGemCommandsUninstallCommand < Gem::InstallerTestCase
     end
 
     assert_equal %w[default-1], Gem::Specification.all_names.sort
+    assert_equal "INFO:  Uninstalled all gems in #{@gemhome}", @ui.output.split("\n").last
   end
 
   def test_execute_outside_gem_home
diff --git a/test/rubygems/test_gem_package.rb b/test/rubygems/test_gem_package.rb
index 5da247e141..64ceda39b2 100644
--- a/test/rubygems/test_gem_package.rb
+++ b/test/rubygems/test_gem_package.rb
@@ -106,7 +106,7 @@ class TestGemPackage < Gem::Package::TarTestCase
     assert_equal expected, YAML.load(checksums)
   end
 
-  def test_build_time_source_date_epoch
+  def test_build_time_uses_source_date_epoch
     epoch = ENV["SOURCE_DATE_EPOCH"]
     ENV["SOURCE_DATE_EPOCH"] = "123456789"
 
@@ -124,12 +124,10 @@ class TestGemPackage < Gem::Package::TarTestCase
     ENV["SOURCE_DATE_EPOCH"] = epoch
   end
 
-  def test_build_time_source_date_epoch_automatically_set
+  def test_build_time_without_source_date_epoch
     epoch = ENV["SOURCE_DATE_EPOCH"]
     ENV["SOURCE_DATE_EPOCH"] = nil
 
-    start_time = Time.now.utc.to_i
-
     spec = Gem::Specification.new 'build', '1'
     spec.summary = 'build'
     spec.authors = 'build'
@@ -138,14 +136,11 @@ class TestGemPackage < Gem::Package::TarTestCase
 
     package = Gem::Package.new spec.file_name
 
-    end_time = Time.now.utc.to_i
-
     assert_kind_of Time, package.build_time
 
     build_time = package.build_time.to_i
 
-    assert_operator(start_time, :<=, build_time)
-    assert_operator(build_time, :<=, end_time)
+    assert_equal Gem.source_date_epoch.to_i, build_time
   ensure
     ENV["SOURCE_DATE_EPOCH"] = epoch
   end
diff --git a/test/rubygems/test_gem_package_tar_writer.rb b/test/rubygems/test_gem_package_tar_writer.rb
index 81661da45a..903d681c7e 100644
--- a/test/rubygems/test_gem_package_tar_writer.rb
+++ b/test/rubygems/test_gem_package_tar_writer.rb
@@ -8,6 +8,11 @@ class TestGemPackageTarWriter < Gem::Package::TarTestCase
   def setup
     super
 
+    # Setting `@default_source_date_epoch` to `nil` effectively resets the
+    # value used for `Gem.source_date_epoch` whenever `$SOURCE_DATE_EPOCH`
+    # is not set.
+    Gem.instance_variable_set(:'@default_source_date_epoch', nil)
+
     @data = 'abcde12345'
     @io = TempIO.new
     @tar_writer = Gem::Package::TarWriter.new @io
diff --git a/test/rubygems/test_gem_request_set.rb b/test/rubygems/test_gem_request_set.rb
index ac344015e7..fb71829471 100644
--- a/test/rubygems/test_gem_request_set.rb
+++ b/test/rubygems/test_gem_request_set.rb
@@ -183,6 +183,58 @@ DEPENDENCIES
     assert_path_exists File.join @gemhome, 'specifications', 'b-1.gemspec'
   end
 
+  def test_install_from_gemdeps_complex_dependencies
+    quick_gem("z", 1)
+    quick_gem("z", "1.0.1")
+    quick_gem("z", "1.0.2")
+    quick_gem("z", "1.0.3")
+    quick_gem("z", 2)
+
+    spec_fetcher do |fetcher|
+      fetcher.download "z", 1
+    end
+
+    rs = Gem::RequestSet.new
+    installed = []
+
+    File.open 'Gemfile.lock', 'w' do |io|
+      io.puts <<-LOCKFILE
+GEM
+  remote: #{@gem_repo}
+  specs:
+    z (1)
+
+PLATFORMS
+  #{Gem::Platform::RUBY}
+
+DEPENDENCIES
+  z (~> 1.0, >= 1.0.1)
+      LOCKFILE
+    end
+
+    File.open 'testo.gemspec', 'w' do |io|
+      io.puts <<-LOCKFILE
+Gem::Specification.new do |spec|
+  spec.name = 'testo'
+  spec.version = '1.0.0'
+  spec.add_dependency('z', '~> 1.0', '>= 1.0.1')
+end
+      LOCKFILE
+    end
+
+    File.open 'Gemfile', 'w' do |io|
+      io.puts("gemspec")
+    end
+
+    rs.install_from_gemdeps :gemdeps => 'Gemfile' do |req, installer|
+      installed << req.full_name
+    end
+
+    assert_includes installed, 'z-1.0.3'
+
+    assert_path_exists File.join @gemhome, 'specifications', 'z-1.0.3.gemspec'
+  end
+
   def test_install_from_gemdeps_version_mismatch
     spec_fetcher do |fetcher|
       fetcher.gem 'a', 2
diff --git a/test/rubygems/test_gem_specification.rb b/test/rubygems/test_gem_specification.rb
index dbd45a31fd..39a483378a 100644
--- a/test/rubygems/test_gem_specification.rb
+++ b/test/rubygems/test_gem_specification.rb
@@ -83,6 +83,11 @@ end
   def setup
     super
 
+    # Setting `@default_source_date_epoch` to `nil` effectively resets the
+    # value used for `Gem.source_date_epoch` whenever `$SOURCE_DATE_EPOCH`
+    # is not set.
+    Gem.instance_variable_set(:'@default_source_date_epoch', nil)
+
     @a1 = util_spec 'a', '1' do |s|
       s.executable = 'exec'
       s.test_file = 'test/suite.rb'
@@ -939,7 +944,7 @@ dependencies: []
     assert_equal File.join(@tempdir, 'a-2.gemspec'), spec.loaded_from
   end
 
-  if RUBY_VERSION < '2.7'
+  if RUBY_ENGINE == 'ruby' and RUBY_VERSION < '2.7'
     def test_self_load_tainted
       full_path = @a2.spec_file
       write_file full_path do |io|
@@ -2784,7 +2789,7 @@ end
     add_runtime_dependency 'l', '~> 1.2', '> 1.2.3'
 #{w}:  open-ended dependency on o (>= 0) is not recommended
   use a bounded requirement, such as '~> x.y'
-#{w}:  See http://guides.rubygems.org/specification-reference/ for help
+#{w}:  See https://guides.rubygems.org/specification-reference/ for help
       EXPECTED
 
       assert_equal expected, @ui.error, 'warning'
@@ -2816,7 +2821,7 @@ duplicate dependency on c (>= 1.2.3, development), (~> 1.2) use:
       end
 
       assert_equal <<-EXPECTED, @ui.error
-#{w}:  See http://guides.rubygems.org/specification-reference/ for help
+#{w}:  See https://guides.rubygems.org/specification-reference/ for help
       EXPECTED
     end
   end
@@ -2927,7 +2932,7 @@ duplicate dependency on c (>= 1.2.3, development), (~> 1.2) use:
       end
     end
 
-    assert_match 'See http://guides.rubygems.org/specification-reference/ for help', @ui.error
+    assert_match 'See https://guides.rubygems.org/specification-reference/ for help', @ui.error
   end
 
   def test_validate_executables
@@ -3100,7 +3105,7 @@ Please report a bug if this causes problems.
 
       assert_equal '"ftp://rubygems.org" is not a valid HTTP URI', e.message
 
-      @a1.homepage = 'http://rubygems.org'
+      @a1.homepage = 'https://rubygems.org/'
       assert_equal true, @a1.validate
 
       @a1.homepage = 'https://rubygems.org'
@@ -3123,6 +3128,21 @@ http://spdx.org/licenses or 'Nonstandard' for a nonstandard license.
     warning
   end
 
+  def test_removed_methods
+    assert_equal Gem::Specification::REMOVED_METHODS, [:rubyforge_project=]
+  end
+
+  def test_validate_removed_rubyforge_project
+    util_setup_validate
+
+    use_ui @ui do
+      @a1.rubyforge_project = 'invalid-attribute'
+      @a1.validate
+    end
+
+    assert_match "rubyforge_project= is deprecated", @ui.error
+  end
+
   def test_validate_license_values
     util_setup_validate
 
@@ -3430,7 +3450,7 @@ Did you mean 'Ruby'?
       @a1.validate
     end
 
-    assert_match 'See http://guides.rubygems.org/specification-reference/ for help', @ui.error
+    assert_match 'See https://guides.rubygems.org/specification-reference/ for help', @ui.error
   end
 
   def test_version
diff --git a/test/rubygems/test_gem_stub_specification.rb b/test/rubygems/test_gem_stub_specification.rb
index 8553194c44..91a46d7842 100644
--- a/test/rubygems/test_gem_stub_specification.rb
+++ b/test/rubygems/test_gem_stub_specification.rb
@@ -4,7 +4,6 @@ require "rubygems/stub_specification"
 
 class TestStubSpecification < Gem::TestCase
 
-  SPECIFICATIONS = File.expand_path(File.join("..", "specifications"), __FILE__)
   FOO = File.join SPECIFICATIONS, "foo-0.0.1-x86-mswin32.gemspec"
   BAR = File.join SPECIFICATIONS, "bar-0.0.2.gemspec"