Use launchctl to get running processes by bundle ID.

Library/Homebrew/cask/lib/hbc/artifact/uninstall_base.rb

@@ -1,4 +1,5 @@
 require "pathname"
+require "timeout"
 
 require "hbc/artifact/base"
 
@@ -127,10 +128,18 @@ module Hbc
       def uninstall_quit(directives)
         Array(directives[:quit]).each do |id|
           ohai "Quitting application ID #{id}"
-          num_running = count_running_processes(id)
+          next if running_processes(id).empty?
-          next unless num_running > 0
           @command.run!("/usr/bin/osascript", args: ["-e", %Q(tell application id "#{id}" to quit)], sudo: true)
-          sleep 3
+
+          begin
+            Timeout.timeout(3) do
+              Kernel.loop do
+                break if running_processes(id).empty?
+              end
+            end
+          rescue Timeout::Error
+            next
+          end
         end
       end
 
@@ -138,9 +147,9 @@ module Hbc
       def uninstall_signal(directives)
         Array(directives[:signal]).flatten.each_slice(2) do |pair|
           raise CaskInvalidError.new(@cask, "Each #{stanza} :signal must have 2 elements.") unless pair.length == 2
-          signal, id = pair
+          signal, bundle_id = pair
-          ohai "Signalling '#{signal}' to application ID '#{id}'"
+          ohai "Signalling '#{signal}' to application ID '#{bundle_id}'"
-          pids = get_unix_pids(id)
+          pids = running_processes(bundle_id).map(&:first)
           next unless pids.any?
           # Note that unlike :quit, signals are sent from the current user (not
           # upgraded to the superuser).  This is a todo item for the future, but
@@ -148,24 +157,20 @@ module Hbc
           # misapplied "kill" by root could bring down the system. The fact that we
           # learned the pid from AppleScript is already some degree of protection,
           # though indirect.
-          odebug "Unix ids are #{pids.inspect} for processes with bundle identifier #{id}"
+          odebug "Unix ids are #{pids.inspect} for processes with bundle identifier #{bundle_id}"
           Process.kill(signal, *pids)
           sleep 3
         end
       end
 
-      def count_running_processes(bundle_id)
+      def running_processes(bundle_id)
-        @command.run!("/usr/bin/osascript",
+        @command.run!("/bin/launchctl", args: ["list"]).stdout.lines
-                      args: ["-e", %Q(tell application "System Events" to count processes whose bundle identifier is "#{bundle_id}")],
+                .map { |line| line.chomp.split("\t") }
-                      sudo: true).stdout.to_i
+                .map { |pid, state, id| [pid.to_i, state.to_i, id] }
-      end
+                .select do |fields|
-
+                  next if fields[0].zero?
-      def get_unix_pids(bundle_id)
+                  fields[2] =~ /^#{Regexp.escape(bundle_id)}($|\.\d+)/
-        pid_string = @command.run!("/usr/bin/osascript",
+                end
-                                   args: ["-e", %Q(tell application "System Events" to get the unix id of every process whose bundle identifier is "#{bundle_id}")],
-                                   sudo: true).stdout.chomp
-        return [] unless pid_string =~ /\A\d+(?:\s*,\s*\d+)*\Z/ # sanity check
-        pid_string.split(/\s*,\s*/).map(&:strip).map(&:to_i)
       end
 
       def uninstall_login_item(directives)

Library/Homebrew/cask/test/cask/artifact/uninstall_test.rb

@@ -207,21 +207,17 @@ describe Hbc::Artifact::Uninstall do
     describe "when using quit" do
       let(:cask) { Hbc.load("with-uninstall-quit") }
       let(:bundle_id) { "my.fancy.package.app" }
-      let(:count_processes_script) {
-        'tell application "System Events" to count processes ' +
-          %Q(whose bundle identifier is "#{bundle_id}")
-      }
       let(:quit_application_script) {
         %Q(tell application id "#{bundle_id}" to quit)
       }
 
       it "can uninstall" do
         Hbc::FakeSystemCommand.stubs_command(
-          sudo(%W[/usr/bin/osascript -e #{count_processes_script}]), "1"
+          %w[/bin/launchctl list], "999\t0\t#{bundle_id}\n"
         )
 
         Hbc::FakeSystemCommand.stubs_command(
-          sudo(%W[/usr/bin/osascript -e #{quit_application_script}])
+          %w[/bin/launchctl list]
         )
 
         subject
@@ -233,14 +229,10 @@ describe Hbc::Artifact::Uninstall do
       let(:bundle_id) { "my.fancy.package.app" }
       let(:signals) { %w[TERM KILL] }
       let(:unix_pids) { [12_345, 67_890] }
-      let(:get_unix_pids_script) {
-        'tell application "System Events" to get the unix id of every process ' +
-          %Q(whose bundle identifier is "#{bundle_id}")
-      }
 
       it "can uninstall" do
         Hbc::FakeSystemCommand.stubs_command(
-          sudo(%W[/usr/bin/osascript -e #{get_unix_pids_script}]), unix_pids.join(", ")
+          %w[/bin/launchctl list], unix_pids.map { |pid| [pid, 0, bundle_id].join("\t") }.join("\n")
         )
 
         signals.each do |signal|

Library/Homebrew/cask/test/cask/artifact/zap_test.rb

@@ -208,21 +208,17 @@ describe Hbc::Artifact::Zap do
     describe "when using quit" do
       let(:cask) { Hbc.load("with-zap-quit") }
       let(:bundle_id) { "my.fancy.package.app" }
-      let(:count_processes_script) {
-        'tell application "System Events" to count processes ' +
-          %Q(whose bundle identifier is "#{bundle_id}")
-      }
       let(:quit_application_script) {
         %Q(tell application id "#{bundle_id}" to quit)
       }
 
       it "can zap" do
         Hbc::FakeSystemCommand.stubs_command(
-          sudo(%W[/usr/bin/osascript -e #{count_processes_script}]), "1"
+          %w[/bin/launchctl list], "999\t0\t#{bundle_id}\n"
         )
 
         Hbc::FakeSystemCommand.stubs_command(
-          sudo(%W[/usr/bin/osascript -e #{quit_application_script}])
+          %w[/bin/launchctl list]
         )
 
         subject
@@ -234,14 +230,10 @@ describe Hbc::Artifact::Zap do
       let(:bundle_id) { "my.fancy.package.app" }
       let(:signals) { %w[TERM KILL] }
       let(:unix_pids) { [12_345, 67_890] }
-      let(:get_unix_pids_script) {
-        'tell application "System Events" to get the unix id of every process ' +
-          %Q(whose bundle identifier is "#{bundle_id}")
-      }
 
       it "can zap" do
         Hbc::FakeSystemCommand.stubs_command(
-          sudo(%W[/usr/bin/osascript -e #{get_unix_pids_script}]), unix_pids.join(", ")
+          %w[/bin/launchctl list], unix_pids.map { |pid| [pid, 0, bundle_id].join("\t") }.join("\n")
         )
 
         signals.each do |signal|