Don't relocate Apple Silicon bottles for default prefix

Library/Homebrew/keg_relocate.rb

@@ -105,6 +105,10 @@ def prepare_relocation_to_placeholders
   alias generic_prepare_relocation_to_placeholders prepare_relocation_to_placeholders
 
   def replace_locations_with_placeholders
+    # Skip relocation for Apple Silicon with default prefix
+    return [] if Utils::Bottles.skip_relocation_for_apple_silicon?
+
+
     relocation = prepare_relocation_to_placeholders.freeze
     relocate_dynamic_linkage(relocation)
     replace_text_in_files(relocation)
@@ -125,7 +129,11 @@ def prepare_relocation_to_locations
   end
   alias generic_prepare_relocation_to_locations prepare_relocation_to_locations
 
-  def replace_placeholders_with_locations(files, skip_linkage: false)
+  def replace_placeholders_with_locations(files = nil,  skip_linkage: false)
+    # Skip relocation for Apple Silicon with default prefix
+    return if Utils::Bottles.skip_relocation_for_apple_silicon?
+
+
     relocation = prepare_relocation_to_locations.freeze
     relocate_dynamic_linkage(relocation) unless skip_linkage
     replace_text_in_files(relocation, files:)

Library/Homebrew/test/utils/bottles/bottles_spec.rb

@@ -53,4 +53,29 @@ class #{Formulary.class_s(formula_name)} < Formula
       end
     end
   end
-end
+
+  describe "#skip_relocation_for_apple_silicon?" do
+    it "returns true for Apple Silicon with default prefix by default" do
+      allow(Hardware::CPU).to receive(:arm?).and_return(true)
+      allow(OS).to receive(:mac?).and_return(true)
+      allow(HOMEBREW_PREFIX).to receive(:to_s).and_return(HOMEBREW_MACOS_ARM_DEFAULT_PREFIX)
+      allow(ENV).to receive(:fetch).with("HOMEBREW_BOTTLE_SKIP_RELOCATION_ARM64", "false").and_return("true")
+
+      expect(described_class.skip_relocation_for_apple_silicon?).to be true
+    end
+
+    it "returns false for Intel Mac" do
+      allow(Hardware::CPU).to receive(:arm?).and_return(false)
+      allow(OS).to receive(:mac?).and_return(true)
+
+      expect(described_class.skip_relocation_for_apple_silicon?).to be false
+    end
+
+    it "returns false for custom prefix on Apple Silicon" do
+      allow(Hardware::CPU).to receive(:arm?).and_return(true)
+      allow(OS).to receive(:mac?).and_return(true)
+      allow(HOMEBREW_PREFIX).to receive(:to_s).and_return("/custom/path")
+
+      expect(described_class.skip_relocation_for_apple_silicon?).to be false
+    end
+  end  

Library/Homebrew/utils/bottles.rb

@@ -128,6 +128,17 @@ def load_tab(formula)
         end
       end
 
+      # Determines if bottle relocation should be skipped for Apple Silicon with default prefix
+      sig { returns(T::Boolean) }
+      def skip_relocation_for_apple_silicon?
+        return false unless Hardware::CPU.arm? 
+        return false unless OS.mac?
+        return false unless HOMEBREW_PREFIX.to_s == HOMEBREW_MACOS_ARM_DEFAULT_PREFIX 
+
+        # Allow gradual rollout via environment variable
+        ENV.fetch("HOMEBREW_BOTTLE_SKIP_RELOCATION_ARM64", "false") == "true"
+      end
+
       private
 
       def bottle_file_list(bottle_file)