Create check_broken_dependents method

Library/Homebrew/upgrade.rb

@@ -120,11 +120,8 @@ module Homebrew
     end
     private_class_method :upgrade_formula
 
-    def check_installed_dependents(args:)
-      installed_formulae = FormulaInstaller.installed.to_a
-      return if installed_formulae.empty?
-
-      already_broken_dependents = CacheStoreDatabase.use(:linkage) do |db|
+    def check_broken_dependents(installed_formulae)
+      CacheStoreDatabase.use(:linkage) do |db|
         installed_formulae.flat_map(&:runtime_installed_formula_dependents)
                           .uniq
                           .select do |f|
@@ -135,6 +132,13 @@ module Homebrew
                         .broken_library_linkage?
         end.compact
       end
+    end
+
+    def check_installed_dependents(args:)
+      installed_formulae = FormulaInstaller.installed.to_a
+      return if installed_formulae.empty?
+
+      already_broken_dependents = check_broken_dependents(installed_formulae)
 
       outdated_dependents =
         installed_formulae.flat_map(&:runtime_installed_formula_dependents)
@@ -180,17 +184,7 @@ module Homebrew
 
       # Assess the dependents tree again now we've upgraded.
       oh1 "Checking for dependents of upgraded formulae..." unless args.dry_run?
-      broken_dependents = CacheStoreDatabase.use(:linkage) do |db|
-        installed_formulae.flat_map(&:runtime_installed_formula_dependents)
-                          .uniq
-                          .select do |f|
-          keg = f.opt_or_installed_prefix_keg
-          next unless keg
-
-          LinkageChecker.new(keg, cache_db: db)
-                        .broken_library_linkage?
-        end.compact
-      end
+      broken_dependents = check_broken_dependents(installed_formulae)
       if broken_dependents.blank?
         if args.dry_run?
           ohai "No currently broken dependents found!"