From 98713e9cd1613dadf6c8c1f06d7dc6ad63f53d9e Mon Sep 17 00:00:00 2001
From: Rylan Polster <rslpolster@gmail.com>
Date: Wed, 14 Jul 2021 02:10:38 -0400
Subject: [PATCH] BottleAPI: only fetch dependencies if they are outdated
 locally

---
 Library/Homebrew/bottle_api.rb | 8 ++++++++
 Library/Homebrew/formula.rb    | 8 +++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/bottle_api.rb b/Library/Homebrew/bottle_api.rb
index 214e62a73d..2cba314eb7 100644
--- a/Library/Homebrew/bottle_api.rb
+++ b/Library/Homebrew/bottle_api.rb
@@ -71,6 +71,14 @@ module BottleAPI
     download_bottle(hash, bottle_tag)
 
     hash["dependencies"].each do |dep_hash|
+      existing_formula = begin
+        Formulary.factory dep_hash["name"]
+      rescue FormulaUnavailableError
+        nil
+      end
+
+      next if existing_formula.present? && existing_formula.latest_version_installed?
+
       download_bottle(dep_hash, bottle_tag)
     end
   end
diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 82801da112..f6c3eca64d 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -520,7 +520,13 @@ class Formula
   # exists and is not empty.
   # @private
   def latest_version_installed?
-    (dir = latest_installed_prefix).directory? && !dir.children.empty?
+    latest_prefix = if ENV["HOMEBREW_JSON_CORE"].present?
+      prefix BottleAPI.latest_pkg_version(name)
+    else
+      latest_installed_prefix
+    end
+
+    (dir = latest_prefix).directory? && !dir.children.empty?
   end
 
   # If at least one version of {Formula} is installed.