uninstall: allow dependent checks to be by-passed

Dependent can be bypassed with `--ignore-dependencies`.
This is now the default for `HOMEBREW_DEVELOPER`s.

Library/Homebrew/cmd/uninstall.rb

@@ -23,17 +23,10 @@ def uninstall
       ARGV.kegs.group_by(&:rack)
     end
 
-    kegs = kegs_by_rack.values.flatten(1)
-
-    kegs.each do |keg|
-      dependents = keg.installed_dependents - kegs
-      if dependents.any?
-        dependents_output = dependents.map { |k| "#{k.name} #{k.version}" }.join(", ")
-        conjugation = dependents.count == 1 ? "is" : "are"
-        ofail "Refusing to uninstall #{keg} because it is required by #{dependents_output}, which #{conjugation} currently installed."
-        # puts "You can override this and force removal with `brew uninstall --force #{keg.name}`."
-        next
-      end
+    # --ignore-dependencies, to be consistent with install
+    unless ARGV.include?("--ignore-dependencies") || ARGV.homebrew_developer?
+      kegs = kegs_by_rack.values.flatten(1)
+      return if check_for_dependents kegs
     end
 
     kegs_by_rack.each do |rack, kegs|
@@ -81,6 +74,20 @@ def uninstall
     end
   end
 
+  def check_for_dependents(kegs)
+    kegs.each do |keg|
+      dependents = keg.installed_dependents - kegs
+      if dependents.any?
+        dependents_output = dependents.map { |k| "#{k.name} #{k.version}" }.join(", ")
+        conjugation = dependents.count == 1 ? "is" : "are"
+        ofail "Refusing to uninstall #{keg} because it is required by #{dependents_output}, which #{conjugation} currently installed."
+        puts "You can override this and force removal with `brew uninstall --ignore-dependencies #{keg.name}`."
+        return true
+      end
+    end
+    false
+  end
+
   def rm_pin(rack)
     Formulary.from_rack(rack).unpin
   rescue

Library/Homebrew/test/test_uninstall.rb

@@ -17,35 +17,75 @@ def install
     CONTENT
   end
 
+  def f1
+    Formulary.factory(@f1_path)
+  end
+
+  def f2
+    Formulary.factory(@f2_path)
+  end
+
   def test_uninstall
     cmd("install", testball)
     assert_match "Uninstalling testball", cmd("uninstall", "--force", testball)
+    assert_empty Formulary.factory(testball).installed_kegs
   end
 
   def test_uninstall_leaving_dependents
     cmd("install", "testball_f2")
-    assert_match "Refusing to uninstall", cmd_fail("uninstall", "testball_f1")
-    assert_match "Uninstalling #{Formulary.factory(@f2_path).rack}",
-      cmd("uninstall", "testball_f2")
+    run_as_not_developer do
+      assert_match "Refusing to uninstall",
+        cmd_fail("uninstall", "testball_f1")
+      refute_empty f1.installed_kegs
+      assert_match "Uninstalling #{f2.rack}",
+        cmd("uninstall", "testball_f2")
+      assert_empty f2.installed_kegs
+    end
   end
 
   def test_uninstall_force_leaving_dependents
     cmd("install", "testball_f2")
-    assert_match "Refusing to uninstall",
-      cmd_fail("uninstall", "testball_f1", "--force")
-    assert_match "Uninstalling testball_f2",
-      cmd("uninstall", "testball_f2", "--force")
+    run_as_not_developer do
+      assert_match "Refusing to uninstall",
+        cmd_fail("uninstall", "testball_f1", "--force")
+      refute_empty f1.installed_kegs
+      assert_match "Uninstalling testball_f2",
+        cmd("uninstall", "testball_f2", "--force")
+      assert_empty f2.installed_kegs
+    end
+  end
+
+  def test_uninstall_ignore_dependencies_leaving_dependents
+    cmd("install", "testball_f2")
+    run_as_not_developer do
+      assert_match "Uninstalling #{f1.rack}",
+        cmd("uninstall", "testball_f1", "--ignore-dependencies")
+      assert_empty f1.installed_kegs
+    end
+  end
+
+  def test_uninstall_leaving_dependents_developer
+    cmd("install", "testball_f2")
+    assert_match "Uninstalling #{f1.rack}",
+      cmd("uninstall", "testball_f1")
+    assert_empty f1.installed_kegs
   end
 
   def test_uninstall_dependent_first
     cmd("install", "testball_f2")
-    assert_match "Uninstalling #{Formulary.factory(@f1_path).rack}",
-      cmd("uninstall", "testball_f2", "testball_f1")
+    run_as_not_developer do
+      assert_match "Uninstalling #{f1.rack}",
+        cmd("uninstall", "testball_f2", "testball_f1")
+      assert_empty f1.installed_kegs
+    end
   end
 
   def test_uninstall_dependent_last
     cmd("install", "testball_f2")
-    assert_match "Uninstalling #{Formulary.factory(@f2_path).rack}",
-      cmd("uninstall", "testball_f1", "testball_f2")
+    run_as_not_developer do
+      assert_match "Uninstalling #{f2.rack}",
+        cmd("uninstall", "testball_f1", "testball_f2")
+      assert_empty f2.installed_kegs
+    end
   end
 end