Merge RubyGems-3.3.0 and Bundler-2.3.0

14 files changed, 112 insertions, 46 deletions

diff --git a/lib/bundler.rb b/lib/bundler.rb
index 81dfd05d26..89865a8254 100644
--- a/lib/bundler.rb
+++ b/lib/bundler.rb
@@ -66,6 +66,7 @@ module Bundler
   autoload :RubyDsl,                File.expand_path("bundler/ruby_dsl", __dir__)
   autoload :RubyVersion,            File.expand_path("bundler/ruby_version", __dir__)
   autoload :Runtime,                File.expand_path("bundler/runtime", __dir__)
+  autoload :SelfManager,            File.expand_path("bundler/self_manager", __dir__)
   autoload :Settings,               File.expand_path("bundler/settings", __dir__)
   autoload :SharedHelpers,          File.expand_path("bundler/shared_helpers", __dir__)
   autoload :Source,                 File.expand_path("bundler/source", __dir__)
@@ -643,6 +644,13 @@ EOF
       Bundler.rubygems.clear_paths
     end
 
+    def self_manager
+      @self_manager ||= begin
+                          require_relative "bundler/self_manager"
+                          Bundler::SelfManager.new
+                        end
+    end
+
     private
 
     def eval_yaml_gemspec(path, contents)
diff --git a/lib/bundler/cli.rb b/lib/bundler/cli.rb
index 36d0472c62..f6e20e7c67 100644
--- a/lib/bundler/cli.rb
+++ b/lib/bundler/cli.rb
@@ -61,6 +61,8 @@ module Bundler
         Bundler.reset_settings_and_root!
       end
 
+      Bundler.self_manager.restart_with_locked_bundler_if_needed
+
       Bundler.settings.set_command_option_if_given :retry, options[:retry]
 
       current_cmd = args.last[:current_command].name
diff --git a/lib/bundler/cli/install.rb b/lib/bundler/cli/install.rb
index 4c1915fea6..85f702bc64 100644
--- a/lib/bundler/cli/install.rb
+++ b/lib/bundler/cli/install.rb
@@ -12,6 +12,8 @@ module Bundler
 
       warn_if_root
 
+      Bundler.self_manager.install_locked_bundler_and_restart_with_it_if_needed
+
       Bundler::SharedHelpers.set_env "RB_USER_INSTALL", "1" if Bundler::FREEBSD
 
       # Disable color in deployment mode
diff --git a/lib/bundler/definition.rb b/lib/bundler/definition.rb
index 84f0367ac7..9a94bd3ed3 100644
--- a/lib/bundler/definition.rb
+++ b/lib/bundler/definition.rb
@@ -294,7 +294,7 @@ module Bundler
 
         if updating_major = locked_major < current_major
           Bundler.ui.warn "Warning: the lockfile is being updated to Bundler #{current_major}, " \
-                          "after which you will be unable to return to Bundler #{@locked_bundler_version.segments.first}."
+                          "after which you will be unable to return to Bundler #{locked_major}."
         end
       end
 
diff --git a/lib/bundler/fetcher.rb b/lib/bundler/fetcher.rb
index 6dd6d089eb..a453157e68 100644
--- a/lib/bundler/fetcher.rb
+++ b/lib/bundler/fetcher.rb
@@ -122,7 +122,6 @@ module Bundler
 
     # return the specs in the bundler format as an index
     def specs(gem_names, source)
-      old = Bundler.rubygems.sources
       index = Bundler::Index.new
 
       if Bundler::Fetcher.disable_endpoint
@@ -153,8 +152,6 @@ module Bundler
     rescue CertificateFailureError
       Bundler.ui.info "" if gem_names && use_api # newline after dots
       raise
-    ensure
-      Bundler.rubygems.sources = old
     end
 
     def use_api
diff --git a/lib/bundler/installer.rb b/lib/bundler/installer.rb
index 49ff177c0f..61bf1e06d4 100644
--- a/lib/bundler/installer.rb
+++ b/lib/bundler/installer.rb
@@ -239,7 +239,7 @@ module Bundler
 
     def ensure_specs_are_compatible!
       system_ruby = Bundler::RubyVersion.system
-      rubygems_version = Gem::Version.create(Gem::VERSION)
+      rubygems_version = Bundler.rubygems.version
       @definition.specs.each do |spec|
         if required_ruby_version = spec.required_ruby_version
           unless required_ruby_version.satisfied_by?(system_ruby.gem_version)
diff --git a/lib/bundler/lockfile_parser.rb b/lib/bundler/lockfile_parser.rb
index 6ff4910a36..e074cbfc33 100644
--- a/lib/bundler/lockfile_parser.rb
+++ b/lib/bundler/lockfile_parser.rb
@@ -46,6 +46,16 @@ module Bundler
       attributes
     end
 
+    def self.bundled_with
+      lockfile = Bundler.default_lockfile
+      return unless lockfile.file?
+
+      lockfile_contents = Bundler.read_file(lockfile)
+      return unless lockfile_contents.include?(BUNDLED)
+
+      lockfile_contents.split(BUNDLED).last.strip
+    end
+
     def initialize(lockfile)
       @platforms    = []
       @sources      = []
@@ -77,25 +87,12 @@ module Bundler
         end
       end
       @specs = @specs.values.sort_by(&:identifier)
-      warn_for_outdated_bundler_version
     rescue ArgumentError => e
       Bundler.ui.debug(e)
       raise LockfileError, "Your lockfile is unreadable. Run `rm #{Bundler.default_lockfile.relative_path_from(SharedHelpers.pwd)}` " \
         "and then `bundle install` to generate a new lockfile."
     end
 
-    def warn_for_outdated_bundler_version
-      return unless bundler_version
-      return if bundler_version.segments.last == "dev"
-      prerelease_text = bundler_version.prerelease? ? " --pre" : ""
-      current_version = Gem::Version.create(Bundler::VERSION)
-      return unless current_version < bundler_version
-      Bundler.ui.warn "Warning: the running version of Bundler (#{current_version}) is older " \
-           "than the version that created the lockfile (#{bundler_version}). We suggest you to " \
-           "upgrade to the version that created the lockfile by running `gem install " \
-           "bundler:#{bundler_version}#{prerelease_text}`.\n"
-    end
-
     private
 
     TYPES = {
diff --git a/lib/bundler/plugin/installer.rb b/lib/bundler/plugin/installer.rb
index d7411fff45..81ecafa470 100644
--- a/lib/bundler/plugin/installer.rb
+++ b/lib/bundler/plugin/installer.rb
@@ -21,7 +21,7 @@ module Bundler
         elsif options[:local_git]
           install_local_git(names, version, options)
         else
-          sources = options[:source] || Bundler.rubygems.sources
+          sources = options[:source] || Gem.sources
           install_rubygems(names, version, sources)
         end
       end
diff --git a/lib/bundler/rubygems_integration.rb b/lib/bundler/rubygems_integration.rb
index effb88c1cd..785f7fa360 100644
--- a/lib/bundler/rubygems_integration.rb
+++ b/lib/bundler/rubygems_integration.rb
@@ -12,25 +12,21 @@ module Bundler
       EXT_LOCK = Monitor.new
     end
 
-    def self.version
-      @version ||= Gem::Version.new(Gem::VERSION)
-    end
-
-    def self.provides?(req_str)
-      Gem::Requirement.new(req_str).satisfied_by?(version)
-    end
-
     def initialize
       @replaced_methods = {}
       backport_ext_builder_monitor
     end
 
     def version
-      self.class.version
+      @version ||= Gem.rubygems_version
     end
 
     def provides?(req_str)
-      self.class.provides?(req_str)
+      Gem::Requirement.new(req_str).satisfied_by?(version)
+    end
+
+    def supports_bundler_trampolining?
+      provides?(">= 3.3.0.a")
     end
 
     def build_args
@@ -142,19 +138,6 @@ module Bundler
       end
     end
 
-    def sources=(val)
-      # Gem.configuration creates a new Gem::ConfigFile, which by default will read ~/.gemrc
-      # If that file exists, its settings (including sources) will overwrite the values we
-      # are about to set here. In order to avoid that, we force memoizing the config file now.
-      configuration
-
-      Gem.sources = val
-    end
-
-    def sources
-      Gem.sources
-    end
-
     def gem_dir
       Gem.dir
     end
@@ -588,6 +571,10 @@ module Bundler
       end
     end
 
+    def find_bundler(version)
+      find_name("bundler").find {|s| s.version.to_s == version }
+    end
+
     def find_name(name)
       Gem::Specification.stubs_for(name).map(&:to_spec)
     end
diff --git a/lib/bundler/self_manager.rb b/lib/bundler/self_manager.rb
new file mode 100644
index 0000000000..bda2eb51f3
--- /dev/null
+++ b/lib/bundler/self_manager.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+module Bundler
+  #
+  # This class handles installing and switching to the version of bundler needed
+  # by an application.
+  #
+  class SelfManager
+    def restart_with_locked_bundler_if_needed
+      return unless needs_switching? && installed?
+
+      restart_with_locked_bundler
+    end
+
+    def install_locked_bundler_and_restart_with_it_if_needed
+      return unless needs_switching?
+
+      Bundler.ui.info \
+        "Bundler #{current_version} is running, but your lockfile was generated with #{lockfile_version}. " \
+        "Installing Bundler #{lockfile_version} and restarting using that version."
+
+      install_and_restart_with_locked_bundler
+    end
+
+    private
+
+    def install_and_restart_with_locked_bundler
+      bundler_dep = Gem::Dependency.new("bundler", lockfile_version)
+
+      Gem.install(bundler_dep)
+    rescue StandardError => e
+      Bundler.ui.trace e
+      Bundler.ui.warn "There was an error installing the locked bundler version (#{lockfile_version}), rerun with the `--verbose` flag for more details. Going on using bundler #{current_version}."
+    else
+      restart_with_locked_bundler
+    end
+
+    def restart_with_locked_bundler
+      configured_gem_home = ENV["GEM_HOME"]
+      configured_gem_path = ENV["GEM_PATH"]
+
+      Bundler.with_original_env do
+        Kernel.exec(
+          { "GEM_HOME" => configured_gem_home, "GEM_PATH" => configured_gem_path, "BUNDLER_VERSION" => lockfile_version },
+          $PROGRAM_NAME, *ARGV
+        )
+      end
+    end
+
+    def needs_switching?
+      ENV["BUNDLER_VERSION"].nil? &&
+        Bundler.rubygems.supports_bundler_trampolining? &&
+        SharedHelpers.in_bundle? &&
+        lockfile_version &&
+        !lockfile_version.end_with?(".dev") &&
+        lockfile_version != current_version
+    end
+
+    def installed?
+      Bundler.configure
+
+      Bundler.rubygems.find_bundler(lockfile_version)
+    end
+
+    def current_version
+      @current_version ||= Bundler::VERSION
+    end
+
+    def lockfile_version
+      @lockfile_version ||= Bundler::LockfileParser.bundled_with
+    end
+  end
+end
diff --git a/lib/bundler/source/metadata.rb b/lib/bundler/source/metadata.rb
index 50b65ce0ea..8bdbaa5527 100644
--- a/lib/bundler/source/metadata.rb
+++ b/lib/bundler/source/metadata.rb
@@ -25,7 +25,7 @@ module Bundler
             s.loaded_from = File.expand_path("..", __FILE__)
           end
 
-          if local_spec = Bundler.rubygems.find_name("bundler").find {|s| s.version.to_s == VERSION }
+          if local_spec = Bundler.rubygems.find_bundler(VERSION)
             idx << local_spec
           end
 
diff --git a/lib/bundler/templates/Executable.bundler b/lib/bundler/templates/Executable.bundler
index 8009412ea2..6bb5c51090 100644
--- a/lib/bundler/templates/Executable.bundler
+++ b/lib/bundler/templates/Executable.bundler
@@ -73,7 +73,7 @@ m = Module.new do
 
     requirement = bundler_gem_version.approximate_recommendation
 
-    return requirement unless Gem::Version.new(Gem::VERSION) < Gem::Version.new("2.7.0")
+    return requirement unless Gem.rubygems_version < Gem::Version.new("2.7.0")
 
     requirement += ".a" if bundler_gem_version.prerelease?
 
diff --git a/lib/bundler/version.rb b/lib/bundler/version.rb
index 0c0d9d360d..d987722f78 100644
--- a/lib/bundler/version.rb
+++ b/lib/bundler/version.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: false
 
 module Bundler
-  VERSION = "2.3.0.dev".freeze
+  VERSION = "2.3.0".freeze
 
   def self.bundler_major_version
     @bundler_major_version ||= VERSION.split(".").first.to_i
diff --git a/lib/rubygems.rb b/lib/rubygems.rb
index 40f3a893d8..a956e06bdb 100644
--- a/lib/rubygems.rb
+++ b/lib/rubygems.rb
@@ -8,7 +8,7 @@
 require 'rbconfig'
 
 module Gem
-  VERSION = "3.3.0.dev".freeze
+  VERSION = "3.3.0".freeze
 end
 
 # Must be first since it unloads the prelude from 1.9.2