From 4f4448c514e9831120efb3f4073e3edf195c62b8 Mon Sep 17 00:00:00 2001
From: Thierry Moisan <thierry.moisan@gmail.com>
Date: Sun, 5 Sep 2021 13:41:15 -0400
Subject: [PATCH 1/2] bump-revision: add --write switch

---
 Library/Homebrew/dev-cmd/bump-revision.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/dev-cmd/bump-revision.rb b/Library/Homebrew/dev-cmd/bump-revision.rb
index 727eb968b3..01eb0ba9c6 100644
--- a/Library/Homebrew/dev-cmd/bump-revision.rb
+++ b/Library/Homebrew/dev-cmd/bump-revision.rb
@@ -18,9 +18,13 @@ module Homebrew
       EOS
       switch "-n", "--dry-run",
              description: "Print what would be done rather than doing it."
+      switch "--write-only",
+             description: "Make the expected file modifications without taking any Git actions."
       flag   "--message=",
              description: "Append <message> to the default commit message."
 
+      conflicts "--dry-run", "--write-only"
+
       named_args :formula, min: 1
     end
   end
@@ -62,7 +66,7 @@ module Homebrew
       message = "#{formula.name}: revision bump #{args.message}"
       if args.dry_run?
         ohai "git commit --no-edit --verbose --message=#{message} -- #{formula.path}"
-      else
+      elsif !args.write_only?
         formula.path.parent.cd do
           safe_system "git", "commit", "--no-edit", "--verbose",
                       "--message=#{message}", "--", formula.path

From 58ddea028bda33bf470f081faa86f04f25305498 Mon Sep 17 00:00:00 2001
From: Thierry Moisan <thierry.moisan@gmail.com>
Date: Wed, 8 Sep 2021 11:13:46 -0400
Subject: [PATCH 2/2] cli/args.rbi: add write_only?

---
 Library/Homebrew/cli/args.rbi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Library/Homebrew/cli/args.rbi b/Library/Homebrew/cli/args.rbi
index 80e172e8d8..004dc2fb22 100644
--- a/Library/Homebrew/cli/args.rbi
+++ b/Library/Homebrew/cli/args.rbi
@@ -290,6 +290,9 @@ module Homebrew
 
       sig { returns(T.nilable(T::Array[String])) }
       def groups; end
+
+      sig { returns(T::Boolean) }
+      def write_only?; end
     end
   end
 end