[rubygems/rubygems] Automatically remove invalid platforms before re-resolving

https://github.com/rubygems/rubygems/commit/40989271dd

lib/bundler/definition.rb

@@ -509,7 +509,7 @@ module Bundler
     def resolution_packages
       @resolution_packages ||= begin
         last_resolve = converge_locked_specs
-        remove_ruby_from_platforms_if_necessary!(current_dependencies)
+        remove_invalid_platforms!(current_dependencies)
         packages = Resolver::Base.new(source_requirements, expanded_dependencies, last_resolve, @platforms, :locked_specs => @originally_locked_specs, :unlock => @unlock[:gems], :prerelease => gem_version_promoter.pre?)
         additional_base_requirements_for_resolve(packages, last_resolve)
       end
@@ -956,17 +956,19 @@ module Bundler
       resolution_packages
     end
 
-    def remove_ruby_from_platforms_if_necessary!(dependencies)
+    def remove_invalid_platforms!(dependencies)
-      return if Bundler.frozen_bundle? ||
+      return if Bundler.frozen_bundle?
-                local_platform == Gem::Platform::RUBY ||
+
-                !platforms.include?(Gem::Platform::RUBY) ||
+      platforms.each do |platform|
-                (@new_platform && platforms.last == Gem::Platform::RUBY) ||
+        next if local_platform == platform ||
+                (@new_platform && platforms.last == platform) ||
                 @path_changes ||
                 @dependency_changes ||
-                !@originally_locked_specs.incomplete_ruby_specs?(dependencies)
+                !@originally_locked_specs.incomplete_for_platform?(dependencies, platform)
 
-      remove_platform(Gem::Platform::RUBY)
+        remove_platform(platform)
-      add_current_platform
+        add_current_platform if platform == Gem::Platform::RUBY
+      end
     end
 
     def source_map

lib/bundler/spec_set.rb

@@ -100,12 +100,12 @@ module Bundler
       end
     end
 
-    def incomplete_ruby_specs?(deps)
+    def incomplete_for_platform?(deps, platform)
       return false if @specs.empty?
 
       @incomplete_specs = []
 
-      self.for(deps, true, [Gem::Platform::RUBY])
+      self.for(deps, true, [platform])
 
       @incomplete_specs.any?
     end

spec/bundler/install/gemfile/specific_platform_spec.rb

@@ -685,6 +685,70 @@ RSpec.describe "bundle install with specific platforms" do
     L
   end
 
+  it "automatically fixes the lockfile if multiple platforms locked, but no valid versions of direct dependencies for all of them" do
+    simulate_platform "x86_64-linux" do
+      build_repo4 do
+        build_gem "nokogiri", "1.14.0" do |s|
+          s.platform = "x86_64-linux"
+        end
+        build_gem "nokogiri", "1.14.0" do |s|
+          s.platform = "arm-linux"
+        end
+
+        build_gem "sorbet-static", "0.5.10696" do |s|
+          s.platform = "x86_64-linux"
+        end
+      end
+
+      gemfile <<~G
+        source "#{file_uri_for(gem_repo4)}"
+
+        gem "nokogiri"
+        gem "sorbet-static"
+      G
+
+      lockfile <<~L
+        GEM
+          remote: #{file_uri_for(gem_repo4)}/
+          specs:
+            nokogiri (1.14.0-arm-linux)
+            nokogiri (1.14.0-x86_64-linux)
+            sorbet-static (0.5.10696-x86_64-linux)
+
+        PLATFORMS
+          arm-linux
+          x86_64-linux
+
+        DEPENDENCIES
+          nokogiri
+          sorbet-static
+
+        BUNDLED WITH
+           #{Bundler::VERSION}
+      L
+
+      bundle "update"
+
+      expect(lockfile).to eq <<~L
+        GEM
+          remote: #{file_uri_for(gem_repo4)}/
+          specs:
+            nokogiri (1.14.0-x86_64-linux)
+            sorbet-static (0.5.10696-x86_64-linux)
+
+        PLATFORMS
+          x86_64-linux
+
+        DEPENDENCIES
+          nokogiri
+          sorbet-static
+
+        BUNDLED WITH
+           #{Bundler::VERSION}
+      L
+    end
+  end
+
   it "automatically fixes the lockfile without removing other variants if it's missing platform gems, but they are installed locally" do
     simulate_platform "x86_64-darwin-21" do
       build_repo4 do