From e8ceda3ad8c84c5b9f61ba521dcadeebbc16b612 Mon Sep 17 00:00:00 2001
From: Gautham Goli <goligautham@gmail.com>
Date: Sun, 11 Nov 2018 18:23:14 +0530
Subject: [PATCH] unpin: Use CLI::Parser to parse args

---
 Library/Homebrew/cmd/unpin.rb | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/cmd/unpin.rb b/Library/Homebrew/cmd/unpin.rb
index 73dd19a066..4f4da23d43 100644
--- a/Library/Homebrew/cmd/unpin.rb
+++ b/Library/Homebrew/cmd/unpin.rb
@@ -3,12 +3,28 @@
 #:    See also `pin`.
 
 require "formula"
+require "cli_parser"
 
 module Homebrew
   module_function
 
+  def unpin_args
+    Homebrew::CLI::Parser.new do
+      usage_banner <<~EOS
+        `unpin` <formulae>
+
+        Unpin <formulae>, allowing them to be upgraded by `brew upgrade` <formulae>.
+        See also `pin`.
+      EOS
+      switch :verbose
+      switch :debug
+    end
+  end
+
   def unpin
-    raise FormulaUnspecifiedError if ARGV.named.empty?
+    unpin_args.parse
+
+    raise FormulaUnspecifiedError if args.remaining.empty?
 
     ARGV.resolved_formulae.each do |f|
       if f.pinned?