make suggestions

Library/Homebrew/cmd/autoremove.rb

@@ -6,8 +6,6 @@ require "cli/parser"
 require "uninstall"
 
 module Homebrew
-  extend Uninstall
-
   module_function
 
   def autoremove_args
@@ -24,7 +22,7 @@ module Homebrew
   end
 
   def get_removable_formulae(formulae)
-    removable_formulae = Formula.installed_non_deps(formulae).reject do |f|
+    removable_formulae = Formula.installed_formulae_with_no_dependents(formulae).reject do |f|
       Tab.for_keg(f.any_installed_keg).installed_on_request
     end
 
@@ -42,12 +40,14 @@ module Homebrew
 
     formulae_names = removable_formulae.map(&:full_name).sort
 
-    oh1 "Formulae that could be removed"
+    intent = args.dry_run? ? "could" : "will"
+    oh1 "Formulae that #{intent} be removed"
     puts formulae_names
 
     return if args.dry_run?
 
+    puts
     kegs_by_rack = removable_formulae.map(&:any_installed_keg).group_by(&:rack)
-    uninstall_kegs(kegs_by_rack)
+    Uninstall.uninstall_kegs(kegs_by_rack)
   end
 end

Library/Homebrew/cmd/leaves.rb

@@ -22,7 +22,6 @@ module Homebrew
   def leaves
     leaves_args.parse
 
-    leaves = Formula.installed_non_deps.map(&:full_name).sort
-    leaves.each(&method(:puts))
+    Formula.installed_formulae_with_no_dependents.map(&:full_name).sort.each(&method(:puts))
   end
 end

Library/Homebrew/cmd/uninstall.rb

@@ -11,8 +11,6 @@ require "cask/cask_loader"
 require "uninstall"
 
 module Homebrew
-  extend Uninstall
-
   module_function
 
   def uninstall_args
@@ -57,7 +55,7 @@ module Homebrew
       kegs_by_rack = all_kegs.group_by(&:rack)
     end
 
-    uninstall_kegs(kegs_by_rack,
+    Uninstall.uninstall_kegs(kegs_by_rack,
                              force:               args.force?,
                              ignore_dependencies: args.ignore_dependencies?,
                              named_args:          args.named)

Library/Homebrew/formula.rb

@@ -1515,16 +1515,12 @@ class Formula
     end.uniq(&:name)
   end
 
-  # An array of installed {Formula} that are dependencies of other installed {Formula}
+  # An array of all installed {Formula} without dependents
   # @private
-  def self.installed_deps(formulae = installed)
-    formulae.flat_map(&:runtime_formula_dependencies).uniq(&:name)
-  end
+  def self.installed_formulae_with_no_dependents(formulae = installed)
+    return [] if formulae.blank?
 
-  # An array of all installed {Formula} that are not dependencies of other installed {Formula}
-  # @private
-  def self.installed_non_deps(formulae = installed)
-    formulae - installed_deps(formulae)
+    formulae - formulae.flat_map(&:runtime_formula_dependencies)
   end
 
   def self.installed_with_alias_path(alias_path)

Library/Homebrew/test/formula_spec.rb

@@ -440,7 +440,7 @@ describe Formula do
     end
   end
 
-  describe "::installed_deps" do
+  describe "::installed_formulae_with_no_dependents" do
     let(:formula_is_dep) do
       formula "foo" do
         url "foo-1.1"
@@ -467,49 +467,12 @@ describe Formula do
     specify "without formulae parameter" do
       allow(described_class).to receive(:installed).and_return(formulae)
 
-      expect(described_class.installed_deps)
-          .to eq([formula_is_dep])
-    end
-
-    specify "with formulae parameter" do
-      expect(described_class.installed_deps(formulae))
-          .to eq([formula_is_dep])
-    end
-  end
-
-  describe "::installed_non_deps" do
-    let(:formula_is_dep) do
-      formula "foo" do
-        url "foo-1.1"
-      end
-    end
-
-    let(:formula_with_deps) do
-      formula "bar" do
-        url "bar-1.0"
-      end
-    end
-
-    let(:formulae) do
-      [
-        formula_with_deps,
-        formula_is_dep,
-      ]
-    end
-
-    before do
-      allow(formula_with_deps).to receive(:runtime_formula_dependencies).and_return([formula_is_dep])
-    end
-
-    specify "without formulae parameter" do
-      allow(described_class).to receive(:installed).and_return(formulae)
-
-      expect(described_class.installed_non_deps)
+      expect(described_class.installed_formulae_with_no_dependents)
           .to eq([formula_with_deps])
     end
 
     specify "with formulae parameter" do
-      expect(described_class.installed_non_deps(formulae))
+      expect(described_class.installed_formulae_with_no_dependents(formulae))
           .to eq([formula_with_deps])
     end
   end