https://git.ruby-lang.org/ruby.git/commit/?id=5ae83151b1

From 5ae83151b16858083e6443fadc76e7fde0ff1199 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Mon, 11 Jul 2022 23:04:56 +0900
Subject: [rubygems/rubygems] Drop support for old `Gem::Specification`
 versions

`specification_version` method was added before RubyGems 1.0, and
`add_runtime_dependency` method was before 1.2.  These seem aged
enough to remove.

https://github.com/rubygems/rubygems/commit/92770c5cd9
---
 lib/rubygems/specification.rb           | 15 ++------------
 test/rubygems/test_gem_specification.rb | 36 ++++++++-------------------------
 2 files changed, 10 insertions(+), 41 deletions(-)

diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index edabcf392a..a8e52e58d5 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -2518,25 +2518,14 @@ class Gem::Specification < Gem::BasicSpecification https://github.com/ruby/ruby/blob/trunk/lib/rubygems/specification.rb#L2518
 
     unless dependencies.empty?
       result << nil
-      result << "  if s.respond_to? :specification_version then"
-      result << "    s.specification_version = #{specification_version}"
-      result << "  end"
+      result << "  s.specification_version = #{specification_version}"
       result << nil
 
-      result << "  if s.respond_to? :add_runtime_dependency then"
-
       dependencies.each do |dep|
         req = dep.requirements_list.inspect
         dep.instance_variable_set :@type, :runtime if dep.type.nil? # HACK
-        result << "    s.add_#{dep.type}_dependency(%q<#{dep.name}>.freeze, #{req})"
-      end
-
-      result << "  else"
-      dependencies.each do |dep|
-        version_reqs_param = dep.requirements_list.inspect
-        result << "    s.add_dependency(%q<#{dep.name}>.freeze, #{version_reqs_param})"
+        result << "  s.add_#{dep.type}_dependency(%q<#{dep.name}>.freeze, #{req})"
       end
-      result << "  end"
     end
 
     result << "end"
diff --git a/test/rubygems/test_gem_specification.rb b/test/rubygems/test_gem_specification.rb
index 693e6e97c5..3f955ce656 100644
--- a/test/rubygems/test_gem_specification.rb
+++ b/test/rubygems/test_gem_specification.rb
@@ -2267,15 +2267,9 @@ Gem::Specification.new do |s| https://github.com/ruby/ruby/blob/trunk/test/rubygems/test_gem_specification.rb#L2267
   s.rubygems_version = "#{Gem::VERSION}".freeze
   s.summary = "this is a summary".freeze
 
-  if s.respond_to? :specification_version then
-    s.specification_version = #{Gem::Specification::CURRENT_SPECIFICATION_VERSION}
-  end
+  s.specification_version = #{Gem::Specification::CURRENT_SPECIFICATION_VERSION}
 
-  if s.respond_to? :add_runtime_dependency then
-    s.add_runtime_dependency(%q<b>.freeze, [\"= 1\"])
-  else
-    s.add_dependency(%q<b>.freeze, [\"= 1\"])
-  end
+  s.add_runtime_dependency(%q<b>.freeze, [\"= 1\"])
 end
     SPEC
 
@@ -2347,15 +2341,9 @@ Gem::Specification.new do |s| https://github.com/ruby/ruby/blob/trunk/test/rubygems/test_gem_specification.rb#L2341
 
   s.installed_by_version = "#{Gem::VERSION}" if s.respond_to? :installed_by_version
 
-  if s.respond_to? :specification_version then
-    s.specification_version = #{Gem::Specification::CURRENT_SPECIFICATION_VERSION}
-  end
+  s.specification_version = #{Gem::Specification::CURRENT_SPECIFICATION_VERSION}
 
-  if s.respond_to? :add_runtime_dependency then
-    s.add_runtime_dependency(%q<b>.freeze, [\"= 1\"])
-  else
-    s.add_dependency(%q<b>.freeze, [\"= 1\"])
-  end
+  s.add_runtime_dependency(%q<b>.freeze, [\"= 1\"])
 end
     SPEC
 
@@ -2406,19 +2394,11 @@ Gem::Specification.new do |s| https://github.com/ruby/ruby/blob/trunk/test/rubygems/test_gem_specification.rb#L2394
   s.summary = "this is a summary".freeze
   s.test_files = ["test/suite.rb".freeze]
 
-  if s.respond_to? :specification_version then
-    s.specification_version = 4
-  end
+  s.specification_version = 4
 
-  if s.respond_to? :add_runtime_dependency then
-    s.add_runtime_dependency(%q<rake>.freeze, [\"> 0.4\"])
-    s.add_runtime_dependency(%q<jabber4r>.freeze, [\"> 0.0.0\"])
-    s.add_runtime_dependency(%q<pqa>.freeze, [\"> 0.4\", \"<= 0.6\"])
-  else
-    s.add_dependency(%q<rake>.freeze, [\"> 0.4\"])
-    s.add_dependency(%q<jabber4r>.freeze, [\"> 0.0.0\"])
-    s.add_dependency(%q<pqa>.freeze, [\"> 0.4\", \"<= 0.6\"])
-  end
+  s.add_runtime_dependency(%q<rake>.freeze, [\"> 0.4\"])
+  s.add_runtime_dependency(%q<jabber4r>.freeze, [\"> 0.0.0\"])
+  s.add_runtime_dependency(%q<pqa>.freeze, [\"> 0.4\", \"<= 0.6\"])
 end
     SPEC
 
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