Add cask to install salt via pkg

Casks/salt.rb

@@ -0,0 +1,75 @@
+cask 'salt' do
+  arch arm: 'arm64', intel: 'x86_64'
+
+  version '3006.1'
+  sha256 arm: '',
+         intel: '21b3dafd8b3e2dd8e4fe7c63dcddec8faac94b953904ffd74ac1cc8f027498a1'
+
+  url "https://repo.saltproject.io/salt/py3/macos/minor/#{version}/salt-#{version}-py3-#{arch}.pkg"
+  name 'Salt'
+  desc 'Salt is the world’s fastest, most intelligent and scalable automation engine'
+  homepage 'https://saltproject.io'
+
+  livecheck do
+    url 'https://repo.saltproject.io/salt/py3/macos/'
+    regex(%r{(\d+(?:\.\d+)?(?:-\d+)?)/})
+  end
+
+  pkg "salt-#{version}-py3-#{arch}.pkg"
+
+  on_arm do
+    postflight do
+      temp_dir = Pathname(Dir.mktempdir)
+      %w[api master minion syndic].each do |daemon|
+        plist_file = "/Library/LaunchDaemons/com.saltstack.salt.#{daemon}.plist"
+        p "Modifying #{plist_file}"
+        next unless File.exist?(plist_file)
+
+        FileUtils.makedirs temp_dir
+        mod_plist_file = temp_dir.join(File.basename(plist_file))
+        FileUtils.copy plist_file, mod_plist_file
+
+        path = `plutil -extract EnvironmentVariables.PATH raw -expect string -n "#{mod_plist_file}"`
+        next unless $?.success?
+
+        system 'putil', '-replace', 'EnvironmentVariables.PATH', '-string', "#{HOMEBRE_PREFIX.to_s}/bin:#{path}", mod_plist_file
+        next unless $?.success?
+
+        system 'plutil', '-insert', 'EnvironmentVariables.HOMEBREW_PREFIX', '-string', HOMEBREW_PREFIX.to_s, mod_plist_file
+        next unless $?.success?
+
+        FileUtils.move mod_plist_file, plist_file
+      end
+    end
+  end
+
+  uninstall pkgutil: [
+              'com.saltstack.salt'
+            ],
+            launchctl: [
+              'com.saltstack.salt.*'
+            ]
+
+  zap trash: [
+    '/etc/salt'
+  ]
+
+  def caveats
+    <<~CAVEATS
+      After installation, configure the Salt minion ID, and the Salt master location,
+      replacing the placeholder text with custom information:
+
+      sudo salt-config -i [MINION_ID] -m [SALT_MASTER_HOST]
+
+      See Configure the Salt master and minions for more configuration options:
+      https://docs.saltproject.io/salt/install-guide/en/latest/topics/configure-master-minion.html
+
+      Load services you need:
+
+      sudo launchctl load -w com.saltstack.salt.api
+      sudo launchctl load -w com.saltstack.salt.master
+      sudo launchctl load -w com.saltstack.salt.minion
+      sudo launchctl load -w com.saltstack.salt.syndic
+    CAVEATS
+  end
+end