Merge #7145

7145: More compatibility cleanup r=hsbt a=deivid-rodriguez

### What was the end-user problem that led to this PR?

The problem was we still have unnecessary code for compatiblity with rubygems versions we no longer support.

### What was your diagnosis of the problem?

My diagnosis was that we can remove this code.

### What is your fix for the problem, implemented in this PR?

My fix is to remove it.

Co-authored-by: David Rodríguez <deivid.rodriguez@riseup.net>

bundler.gemspec

@@ -31,13 +31,8 @@ Gem::Specification.new do |s|
     }
   end
 
-  if s.version >= Gem::Version.new("2.a".dup)
-    s.required_ruby_version     = ">= 2.3.0"
-    s.required_rubygems_version = ">= 2.5.0"
-  else
-    s.required_ruby_version     = ">= 1.8.7"
-    s.required_rubygems_version = ">= 1.3.6"
-  end
+  s.required_ruby_version     = ">= 2.3.0"
+  s.required_rubygems_version = ">= 2.5.0"
 
   s.add_development_dependency "automatiek", "~> 0.1.0"
   s.add_development_dependency "rake",       "~> 12.0"

lib/bundler/rubygems_ext.rb

@@ -44,15 +44,7 @@ def loaded_from
     end
 
     def load_paths
-      return full_require_paths if respond_to?(:full_require_paths)
-
-      require_paths.map do |require_path|
-        if require_path.include?(full_gem_path)
-          require_path
-        else
-          File.join(full_gem_path, require_path)
-        end
-      end
+      full_require_paths
     end
 
     if method_defined?(:extension_dir)
@@ -136,32 +128,6 @@ def to_lock
       end
       out
     end
-
-    # Backport of performance enhancement added to RubyGems 1.4
-    def matches_spec?(spec)
-      # name can be a Regexp, so use ===
-      return false unless name === spec.name
-      return true  if requirement.none?
-
-      requirement.satisfied_by?(spec.version)
-    end unless allocate.respond_to?(:matches_spec?)
-  end
-
-  class Requirement
-    # Backport of performance enhancement added to RubyGems 1.4
-    def none?
-      # note that it might be tempting to replace with with RubyGems 2.0's
-      # improved implementation. Don't. It requires `DefaultRequirement` to be
-      # defined, and more importantantly, these overrides are not used when the
-      # running RubyGems defines these methods
-      to_s == ">= 0"
-    end unless allocate.respond_to?(:none?)
-
-    # Backport of performance enhancement added to RubyGems 2.2
-    def exact?
-      return false unless @requirements.size == 1
-      @requirements[0][0] == "="
-    end unless allocate.respond_to?(:exact?)
   end
 
   class Platform

lib/bundler/rubygems_integration.rb

@@ -213,16 +213,8 @@ def preserve_paths
     end
 
     def loaded_gem_paths
-      # RubyGems 2.2+ can put binary extension into dedicated folders,
-      # therefore use RubyGems facilities to obtain their load paths.
-      if Gem::Specification.method_defined? :full_require_paths
-        loaded_gem_paths = Gem.loaded_specs.map {|_, s| s.full_require_paths }
-        loaded_gem_paths.flatten
-      else
-        $LOAD_PATH.select do |p|
-          Bundler.rubygems.gem_path.any? {|gp| p =~ /^#{Regexp.escape(gp)}/ }
-        end
-      end
+      loaded_gem_paths = Gem.loaded_specs.map {|_, s| s.full_require_paths }
+      loaded_gem_paths.flatten
     end
 
     def load_plugins
@@ -463,25 +455,6 @@ def replace_entrypoints(specs)
       Gem.clear_paths
     end
 
-    # This backports the correct segment generation code from RubyGems 1.4+
-    # by monkeypatching it into the method in RubyGems 1.3.6 and 1.3.7.
-    def backport_segment_generation
-      redefine_method(Gem::Version, :segments) do
-        @segments ||= @version.scan(/[0-9]+|[a-z]+/i).map do |s|
-          /^\d+$/ =~ s ? s.to_i : s
-        end
-      end
-    end
-
-    # This backport fixes the marshaling of @segments.
-    def backport_yaml_initialize
-      redefine_method(Gem::Version, :yaml_initialize) do |_, map|
-        @version = map["version"]
-        @segments = nil
-        @hash = nil
-      end
-    end
-
     # This backports base_dir which replaces installation path
     # RubyGems 1.8+
     def backport_base_dir
@@ -652,16 +625,8 @@ module Ext
       end
     end
 
-    if Gem::Specification.respond_to?(:stubs_for)
-      def find_name(name)
-        Gem::Specification.stubs_for(name).map(&:to_spec)
-      end
-    else
-      def find_name(name)
-        Gem::Specification.stubs.find_all do |spec|
-          spec.name == name
-        end.map(&:to_spec)
-      end
+    def find_name(name)
+      Gem::Specification.stubs_for(name).map(&:to_spec)
     end
 
     if Gem::Specification.respond_to?(:default_stubs)

lib/bundler/shared_helpers.rb

@@ -103,9 +103,7 @@ def set_bundle_environment
     #
     # @see {Bundler::PermissionError}
     def filesystem_access(path, action = :write, &block)
-      # Use block.call instead of yield because of a bug in Ruby 2.2.2
-      # See https://github.com/bundler/bundler/issues/5341 for details
-      block.call(path.dup.untaint)
+      yield(path.dup.untaint)
     rescue Errno::EACCES
       raise PermissionError.new(path, action)
     rescue Errno::EAGAIN

lib/bundler/stub_specification.rb

@@ -55,8 +55,6 @@ def full_require_paths
       stub.full_require_paths
     end
 
-    # This is what we do in bundler/rubygems_ext
-    # full_require_paths is always implemented
     def load_paths
       full_require_paths
     end