[rubygems/rubygems] Make sure to not re-resolve when a not fully specific local platform is locked

rubygems/rubygems@36a02c6128

Author: deivid-rodriguez

lib/bundler/definition.rb

@@ -621,11 +621,13 @@ def materialize(dependencies)
     end
 
     def start_resolution
+      @platforms |= [local_platform]
+
       result = SpecSet.new(resolver.start)
 
       @resolved_bundler_version = result.find {|spec| spec.name == "bundler" }&.version
 
-      if @current_ruby_locked_platform && @current_ruby_locked_platform != local_platform
+      if most_specific_ruby_locked_platform_is_not_local_platform?
         @platforms.delete(result.incomplete_for_platform?(dependencies, @current_ruby_locked_platform) ? @current_ruby_locked_platform : local_platform)
       end
 
@@ -667,10 +669,15 @@ def current_platform_locked?
 
     def add_current_platform
       @current_ruby_locked_platform = most_specific_locked_platform if current_ruby_platform_locked?
+      return if most_specific_ruby_locked_platform_is_not_local_platform?
 
       add_platform(local_platform)
     end
 
+    def most_specific_ruby_locked_platform_is_not_local_platform?
+      @current_ruby_locked_platform && @current_ruby_locked_platform != local_platform
+    end
+
     def change_reason
       if unlocking?
         unlock_targets = if @gems_to_unlock.any?

spec/bundler/install/gemfile/specific_platform_spec.rb

@@ -1434,6 +1434,40 @@
     end
   end
 
+  it "does not re-resolve when a specific platform, but less specific than the current platform, is locked" do
+    build_repo4 do
+      build_gem "nokogiri"
+    end
+
+    gemfile <<~G
+      source "#{file_uri_for(gem_repo4)}"
+
+      gem "nokogiri"
+    G
+
+    lockfile <<~L
+      GEM
+        remote: #{file_uri_for(gem_repo4)}/
+        specs:
+          nokogiri (1.0)
+
+      PLATFORMS
+        arm64-darwin
+
+      DEPENDENCIES
+        nokogiri!
+
+      BUNDLED WITH
+         #{Bundler::VERSION}
+    L
+
+    simulate_platform "arm64-darwin-23" do
+      bundle "install --verbose"
+
+      expect(out).to include("Found no changes, using resolution from the lockfile")
+    end
+  end
+
   private
 
   def setup_multiplatform_gem