Refactor list-installed-launchjob-ids dev script to Ruby

Author: danielbayley

cmd/brew-list-installed-launchjob-ids

@@ -0,0 +1,63 @@
+# typed: strict
+# frozen_string_literal: true
+
+require "abstract_command"
+require "open3"
+
+module Homebrew
+  module Cmd
+    class ListInstalledLaunchjobIdsCmd < AbstractCommand
+      cmd_args do
+        description <<~EOS
+          List all installed launchjob IDs, which may be useful
+          in a Cask uninstall stanza, e.g.:
+
+              uninstall launchctl: "job.id.goes.here"
+
+          Launchctl jobs attributed to Apple will be omitted.
+
+          If a launchctl job is currently loaded, and visible to the current
+          user, it will be followed by a plus symbol '(+)' in the output.
+          This can be verified via the command:
+
+              /bin/launchctl list 'job.id.goes.here'
+
+          See CONTRIBUTING.md and 'man launchctl' for more information.
+        EOS
+
+        named_args :none
+
+        hide_from_man_page!
+      end
+
+      sig { override.returns(T.nilable(String)) }
+      def run
+        loaded = list_loaded_launchjob_ids
+        pattern = "{#{Dir.home},}/Library/Launch{Agents,Daemons}/**.plist"
+        puts Pathname
+          .glob(pattern)
+          .filter(&:readable?)
+          .filter_map { method(:read_label).call(it) }
+          .reject { it.start_with? "com.apple." }
+          .uniq.sort
+          .map { loaded.include?(it) ? "#{it} (+)" : it }
+      end
+
+      sig { params(plist: Pathname).returns(T.nilable(String)) }
+      def read_label(plist)
+        xml = plist.read
+        if xml.start_with? "bplist"
+          xml, _, status = Open3.capture3("/usr/bin/plutil -convert xml1 -o - '#{plist}'")
+          return unless status.success?
+        end
+        Plist.parse_xml(xml, marshal: false)["Label"]
+      end
+
+      sig { returns(T::Array[T.nilable(String)]) }
+      def list_loaded_launchjob_ids
+        loaded, = Open3.capture3("/bin/launchctl list")
+        loaded.lines.map { it.split(/\s+/).last }
+      end
+    end
+  end
+end