Deploy akkounts without the application_git cookbook

Use the built-in git resource from Chef instead. poise/application does
not work on modern Chef.

cookbooks/ruby_build/resources/homebrew_update.rb

@@ -0,0 +1,77 @@
+unified_mode true if respond_to? :unified_mode
+
+provides :homebrew_update
+
+description 'Use the **homebrew_update** resource to manage Homebrew repository updates on MacOS.'
+introduced '16.2'
+examples <<~DOC
+  **Update the hombrew repository data at a specified interval**:
+  ```ruby
+  homebrew_update 'all platforms' do
+    frequency 86400
+    action :periodic
+  end
+  ```
+  **Update the Homebrew repository at the start of a Chef Infra Client run**:
+  ```ruby
+  homebrew_update 'update'
+  ```
+DOC
+
+# allow bare homebrew_update with no name
+property :name, String, default: ''
+
+property :frequency, Integer,
+  description: 'Determines how frequently (in seconds) Homebrew updates are made. Use this property when the `:periodic` action is specified.',
+  default: 86_400
+
+default_action :periodic
+
+action_class do
+  BREW_STAMP_DIR = '/var/lib/homebrew/periodic'.freeze
+  BREW_STAMP = "#{BREW_STAMP_DIR}/update-success-stamp".freeze
+
+  # Determines whether we need to run `homebrew update`
+  #
+  # @return [Boolean]
+  def brew_up_to_date?
+    ::File.exist?(BREW_STAMP) &&
+      ::File.mtime(BREW_STAMP) > Time.now - new_resource.frequency
+  end
+
+  def do_update
+    directory BREW_STAMP_DIR do
+      recursive true
+    end
+
+    file BREW_STAMP do
+      content "BREW::Update::Post-Invoke-Success\n"
+      action :create_if_missing
+    end
+
+    execute 'brew update' do
+      command %w(brew update)
+      default_env true
+      user Homebrew.owner
+      notifies :touch, "file[#{BREW_STAMP}]", :immediately
+    end
+  end
+end
+
+action :periodic do
+  return unless mac_os_x?
+
+  unless brew_up_to_date?
+    converge_by 'update new lists of packages' do
+      do_update
+    end
+  end
+end
+
+action :update do
+  return unless mac_os_x?
+
+  converge_by 'force update new lists of packages' do
+    do_update
+  end
+end