ignore skip_clean :all

Library/Homebrew/cmd/audit.rb

@@ -447,7 +447,8 @@ class FormulaAuditor
     end
 
     if line =~ /skip_clean\s+:all/
-      problem "`skip_clean :all` is deprecated; brew no longer strips symbols"
+      problem "`skip_clean :all` is deprecated; brew no longer strips symbols\n" +
+              "\tPass explicit paths to prevent Homebrew from removing empty folders."
     end
 
     if line =~ /depends_on [A-Z][\w:]+\.new$/

Library/Homebrew/formula.rb

@@ -247,12 +247,11 @@ class Formula
     end
   end
 
-  # sometimes the clean process breaks things
+  # sometimes the cleaner breaks things
   # skip cleaning paths in a formula with a class method like this:
-  #   skip_clean [bin+"foo", lib+"bar"]
-  # redefining skip_clean? now deprecated
+  #   skip_clean bin/"foo", lib/"bar"
+  #   skip_clean :la
   def skip_clean? path
-    return true if self.class.skip_clean_all?
     return true if path.extname == '.la' and self.class.skip_clean_paths.include? :la
     to_check = path.relative_path_from(prefix).to_s
     self.class.skip_clean_paths.include? to_check
@@ -745,20 +744,10 @@ class Formula
 
     def skip_clean *paths
       paths.flatten!
-
-      # :all is deprecated though
-      if paths.include? :all
-        @skip_clean_all = true
-        return
-      end
-
+      # Specifying :all is deprecated and will become an error
       skip_clean_paths.merge(paths)
     end
 
-    def skip_clean_all?
-      @skip_clean_all
-    end
-
     def skip_clean_paths
       @skip_clean_paths ||= Set.new
     end

Library/Homebrew/formula_installer.rb

@@ -482,14 +482,6 @@ class FormulaInstaller
 
   def clean
     ohai "Cleaning" if ARGV.verbose?
-    if f.class.skip_clean_all?
-      opoo "skip_clean :all is deprecated"
-      puts "Skip clean was commonly used to prevent brew from stripping binaries."
-      puts "brew no longer strips binaries, if skip_clean is required to prevent"
-      puts "brew from removing empty directories, you should specify exact paths"
-      puts "in the formula."
-      return
-    end
     Cleaner.new(f).clean
   rescue Exception => e
     opoo "The cleaning step did not complete successfully"