From 2ff0b6471a3111b5b64e1093ce36b046396007a0 Mon Sep 17 00:00:00 2001
From: Gautham Goli <goligautham@gmail.com>
Date: Sun, 11 Nov 2018 19:13:28 +0530
Subject: [PATCH] leaves: Use CLI::Parser to parse args

---
 Library/Homebrew/cmd/leaves.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Library/Homebrew/cmd/leaves.rb b/Library/Homebrew/cmd/leaves.rb
index ec5238c2a1..2f4d1fb0ad 100644
--- a/Library/Homebrew/cmd/leaves.rb
+++ b/Library/Homebrew/cmd/leaves.rb
@@ -3,11 +3,25 @@
 
 require "formula"
 require "tab"
+require "cli_parser"
 
 module Homebrew
   module_function
 
+  def leaves_args
+    Homebrew::CLI::Parser.new do
+      usage_banner <<~EOS
+        `leaves`
+
+        Show installed formulae that are not dependencies of another installed formula.
+      EOS
+      switch :debug
+    end
+  end
+
   def leaves
+    leaves_args.parse
+
     installed = Formula.installed.sort
 
     deps_of_installed = installed.flat_map do |f|