cleanup: better handle edge cases.

Library/Homebrew/cleanup.rb

@@ -178,13 +178,13 @@ def periodic_clean!
       return false unless periodic_clean_due?
 
       ohai "`brew cleanup` has not been run in #{CLEANUP_DEFAULT_DAYS} days, running now..."
-      clean!
+      clean!(quiet: true)
     end
 
-    def clean!
+    def clean!(quiet: false)
       if args.empty?
         Formula.installed.sort_by(&:name).each do |formula|
-          cleanup_formula(formula)
+          cleanup_formula(formula, quiet: quiet)
         end
         cleanup_cache
         cleanup_logs
@@ -221,8 +221,9 @@ def unremovable_kegs
       @unremovable_kegs ||= []
     end
 
-    def cleanup_formula(formula)
-      formula.eligible_kegs_for_cleanup.each(&method(:cleanup_keg))
+    def cleanup_formula(formula, quiet: false)
+      formula.eligible_kegs_for_cleanup(quiet: quiet)
+             .each(&method(:cleanup_keg))
       cleanup_cache(Pathname.glob(cache/"#{formula.name}--*"))
       rm_ds_store([formula.rack])
       cleanup_lockfiles(FormulaLock.new(formula.name).path)
@@ -275,6 +276,8 @@ def cleanup_unreferenced_downloads
             # Skip incomplete downloads which are still in progress.
             next
           end
+        elsif download.directory?
+          FileUtils.rm_rf download
         else
           download.unlink
         end

Library/Homebrew/formula.rb

@@ -1924,7 +1924,7 @@ def system(cmd, *args)
   end
 
   # @private
-  def eligible_kegs_for_cleanup
+  def eligible_kegs_for_cleanup(quiet: false)
     eligible_for_cleanup = []
     if installed?
       eligible_kegs = if head? && (head_prefix = latest_head_prefix)
@@ -1945,9 +1945,9 @@ def eligible_kegs_for_cleanup
       unless eligible_kegs.empty?
         eligible_kegs.each do |keg|
           if keg.linked?
-            opoo "Skipping (old) #{keg} due to it being linked"
+            opoo "Skipping (old) #{keg} due to it being linked" unless quiet
           elsif pinned? && keg == Keg.new(@pin.path.resolved_path)
-            opoo "Skipping (old) #{keg} due to it being pinned"
+            opoo "Skipping (old) #{keg} due to it being pinned" unless quiet
           else
             eligible_for_cleanup << keg
           end
@@ -1957,7 +1957,9 @@ def eligible_kegs_for_cleanup
       # If the cellar only has one version installed, don't complain
       # that we can't tell which one to keep. Don't complain at all if the
       # only installed version is a pinned formula.
-      opoo "Skipping #{full_name}: most recent version #{pkg_version} not installed"
+      unless quiet
+        opoo "Skipping #{full_name}: most recent version #{pkg_version} not installed"
+      end
     end
     eligible_for_cleanup
   end

Library/Homebrew/keg.rb

@@ -310,6 +310,8 @@ def uninstall
     remove_opt_record if optlinked?
     remove_old_aliases
     remove_oldname_opt_record
+  rescue Errno::ENOTEMPTY
+    ofail "Could not remove #{path}! Check its permissions."
   end
 
   def unlink(mode = OpenStruct.new)