bundle/brew_services: tolerate missing launchctl/systemctl

Author: branchv

Library/Homebrew/bundle/brew_services.rb

@@ -59,10 +59,10 @@ def started?(name)
           end
 
           def started_services
-            @started_services ||= begin
-              if !Homebrew::Services::System.launchctl? && !Homebrew::Services::System.systemctl?
-                odie Homebrew::Services::System::MISSING_DAEMON_MANAGER_EXCEPTION_MESSAGE
-              end
+            @started_services ||= if !Homebrew::Services::System.launchctl? && !Homebrew::Services::System.systemctl?
+              opoo "Skipping `brew services list` due to missing launchctl/systemctl"
+              []
+            else
               states_to_skip = %w[stopped none]
 
               services_list = JSON.parse(Utils.safe_popen_read(HOMEBREW_BREW_FILE, "services", "list", "--json"))

Library/Homebrew/test/bundle/brew_services_spec.rb

@@ -34,12 +34,9 @@
       expect(described_class.started_services).to eq([])
     end
 
-    it "exits with error when no daemon manager is available" do
+    it "returns empty array when no daemon manager is available" do
       allow(Homebrew::Services::System).to receive_messages(launchctl?: false, systemctl?: false)
-      expect do
-        described_class.started_services
-      end.to raise_error(SystemExit)
-        .and output(/supported only on macOS or Linux/).to_stderr
+      expect(described_class.started_services).to eq([])
     end
   end