Merge pull request #19188 from Homebrew/arm64_linux-tag

Rename aarch64_linux tag to arm64_linux

Library/Homebrew/brew.sh

@@ -4,7 +4,7 @@
 #####
 
 case "${MACHTYPE}" in
-  arm64-*)
+  arm64-* | aarch64-*)
     HOMEBREW_PROCESSOR="arm64"
     ;;
   x86_64-*)

Library/Homebrew/github_packages.rb

@@ -350,7 +350,7 @@ class GitHubPackages
       tar_gz_sha256 = write_tar_gz(local_file, blobs)
 
       tab = tag_hash["tab"]
-      architecture = TAB_ARCH_TO_PLATFORM_ARCHITECTURE[tab["arch"].presence || bottle_tag.arch.to_s]
+      architecture = TAB_ARCH_TO_PLATFORM_ARCHITECTURE[tab["arch"].presence || bottle_tag.standardized_arch.to_s]
       raise TypeError, "unknown tab['arch']: #{tab["arch"]}" if architecture.blank?
 
       os = if tab["built_on"].present? && tab["built_on"]["os"].present?

Library/Homebrew/software_spec.rb

@@ -315,7 +315,7 @@ class Bottle
       raise ArgumentError, "Invalid bottle version" unless Utils.safe_filename?(version.to_s)
 
       @version = version
-      @tag = tag.to_s
+      @tag = tag.to_unstandardized_sym.to_s
       @rebuild = rebuild
     end
 

Library/Homebrew/test/formula_spec.rb

@@ -1024,6 +1024,11 @@ RSpec.describe Formula do
               "intel-formula",
               "linux-formula"
             ]
+          },
+          "arm64_linux": {
+            "dependencies": [
+              "linux-formula"
+            ]
           }
         }
       JSON

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

@@ -79,11 +79,11 @@ RSpec.describe Utils::Bottles::Tag do
       expect(tag.valid_combination?).to be true
     end
 
-    it "returns false for ARM on Linux" do
+    it "returns true for ARM on Linux" do
       tag = described_class.new(system: :linux, arch: :arm64)
-      expect(tag.valid_combination?).to be false
+      expect(tag.valid_combination?).to be true
       tag = described_class.new(system: :linux, arch: :arm)
-      expect(tag.valid_combination?).to be false
+      expect(tag.valid_combination?).to be true
     end
   end
 end

Library/Homebrew/utils/bottles.rb

@@ -186,20 +186,14 @@ module Utils
       sig { returns(Symbol) }
       def standardized_arch
         return :x86_64 if [:x86_64, :intel].include? arch
-        return :arm64 if [:arm64, :arm].include? arch
+        return :arm64 if [:arm64, :arm, :aarch64].include? arch
 
         arch
       end
 
       sig { returns(Symbol) }
       def to_sym
-        if system == :all && arch == :all
+        arch_to_symbol(standardized_arch)
-          :all
-        elsif macos? && [:x86_64, :intel].include?(arch)
-          system
-        else
-          :"#{standardized_arch}_#{system}"
-        end
       end
 
       sig { returns(String) }
@@ -207,6 +201,14 @@ module Utils
         to_sym.to_s
       end
 
+      def to_unstandardized_sym
+        # Never allow these generic names
+        return to_sym if [:intel, :arm].include? arch
+
+        # Backwards compatibility with older bottle names
+        arch_to_symbol(arch)
+      end
+
       sig { returns(MacOSVersion) }
       def to_macos_version
         @to_macos_version ||= MacOSVersion.from_symbol(system)
@@ -224,8 +226,8 @@ module Utils
 
       sig { returns(T::Boolean) }
       def valid_combination?
-        return true unless [:arm64, :arm].include? arch
+        return true unless [:arm64, :arm, :aarch64].include? arch
-        return false if linux?
+        return true unless macos?
 
         # Big Sur is the first version of macOS that runs on ARM
         to_macos_version >= :big_sur
@@ -235,7 +237,7 @@ module Utils
       def default_prefix
         if linux?
           HOMEBREW_LINUX_DEFAULT_PREFIX
-        elsif arch == :arm64
+        elsif standardized_arch == :arm64
           HOMEBREW_MACOS_ARM_DEFAULT_PREFIX
         else
           HOMEBREW_DEFAULT_PREFIX
@@ -246,12 +248,25 @@ module Utils
       def default_cellar
         if linux?
           Homebrew::DEFAULT_LINUX_CELLAR
-        elsif arch == :arm64
+        elsif standardized_arch == :arm64
           Homebrew::DEFAULT_MACOS_ARM_CELLAR
         else
           Homebrew::DEFAULT_MACOS_CELLAR
         end
       end
+
+      private
+
+      sig { params(arch: Symbol).returns(Symbol) }
+      def arch_to_symbol(arch)
+        if system == :all && arch == :all
+          :all
+        elsif macos? && standardized_arch == :x86_64
+          system
+        else
+          :"#{arch}_#{system}"
+        end
+      end
     end
 
     # The specification for a specific tag

docs/Homebrew-on-Linux.md

@@ -77,7 +77,7 @@ To install build tools, paste at a terminal prompt:
 
 ### ARM (unsupported)
 
-Homebrew can run on 32-bit ARM (Raspberry Pi and others) and 64-bit ARM (AArch64), but as they lack binary packages (bottles) they are unsupported. Pull requests are welcome to improve the experience on ARM platforms.
+Homebrew can run on 32-bit ARM (e.g. Raspberry Pi and others) and 64-bit ARM (ARM64, also known as AArch64), but as they lack bottles (binary packages) they are unsupported. Pull requests are welcome to improve the experience on ARM platforms.
 
 You may need to install your own Ruby using your system package manager, a PPA, or `rbenv/ruby-build` as we no longer distribute a Homebrew Portable Ruby for ARM.