Hardware::CPU: Implement OS-agnostic methods

Library/Homebrew/extend/os/linux/hardware/cpu.rb

@@ -1,26 +1,13 @@
 module Hardware
   class CPU
     class << self
-      def universal_archs
-        [].extend ArchitectureListExtension
-      end
-
       def cpuinfo
         @cpuinfo ||= File.read("/proc/cpuinfo")
       end
 
-      def type
-        @type ||= if cpuinfo =~ /Intel|AMD/
-          :intel
-        elsif cpuinfo =~ /ARM|Marvell/
-          :arm
-        else
-          :dunno
-        end
-      end
-
       def family
         return :arm if arm?
+        return :ppc if ppc?
         return :dunno unless intel?
         # See https://software.intel.com/en-us/articles/intel-architecture-and-processor-identification-with-cpuid-model-and-family-numbers
         cpu_family = cpuinfo[/^cpu family\s*: ([0-9]+)/, 1].to_i
@@ -70,12 +57,9 @@ module Hardware
         end
       end
 
-      def cores
-        cpuinfo.scan(/^processor/).size
-      end
-
       def flags
-        @flags ||= cpuinfo[/^(flags|Features).*/, 0].split
+        @flags ||= cpuinfo[/^(flags|Features).*/, 0]&.split
+        @flags ||= []
       end
 
       # Compatibility with Mac method, which returns lowercase symbols
@@ -95,12 +79,6 @@ module Hardware
       def sse4?
         flags.include? "sse4_1"
       end
-
-      alias is_64_bit? lm?
-
-      def bits
-        is_64_bit? ? 64 : 32
-      end
     end
   end
 end

Library/Homebrew/extend/os/mac/hardware/cpu.rb

@@ -75,22 +75,6 @@ module Hardware
         sysctl_int("machdep.cpu.extmodel")
       end
 
-      def cores
-        sysctl_int("hw.ncpu")
-      end
-
-      def bits
-        sysctl_bool("hw.cpu64bit_capable") ? 64 : 32
-      end
-
-      def arch_32_bit
-        intel? ? :i386 : :ppc
-      end
-
-      def arch_64_bit
-        intel? ? :x86_64 : :ppc64
-      end
-
       # Returns an array that's been extended with ArchitectureListExtension,
       # which provides helpers like #as_arch_flags and #as_cmake_arch_flags.
       def universal_archs

Library/Homebrew/hardware.rb

@@ -19,16 +19,48 @@ module Hardware
       end
 
       def arch_32_bit
-        :i386
+        if arm?
+          :arm
+        elsif intel?
+          :i386
+        elsif ppc?
+          :ppc32
+        else
+          :dunno
+        end
       end
 
       def arch_64_bit
-        :x86_64
+        if arm?
+          :arm64
+        elsif intel?
+          :x86_64
+        elsif ppc?
+          :ppc64
+        else
+          :dunno
+        end
+      end
+
+      def arch
+        case bits
+        when 32
+          arch_32_bit
+        when 64
+          arch_64_bit
+        else
+          :dunno
+        end
+      end
+
+      def universal_archs
+        [arch].extend ArchitectureListExtension
       end
 
       def type
         case RUBY_PLATFORM
         when /x86_64/, /i\d86/ then :intel
+        when /arm/ then :arm
         when /ppc\d+/ then :ppc
         else :dunno
         end
@@ -39,13 +71,16 @@ module Hardware
       end
 
       def cores
-        1
+        return @cores if @cores
+        @cores = Utils.popen_read("getconf", "_NPROCESSORS_ONLN").chomp.to_i
+        @cores = 1 unless $CHILD_STATUS.success?
+        @cores
       end
 
       def bits
-        case RUBY_PLATFORM
-        when /x86_64/, /ppc64/ then 64
-        when /i\d86/, /ppc/ then 32
+        @bits ||= case RUBY_PLATFORM
+        when /x86_64/, /ppc64/, /aarch64|arm64/ then 64
+        when /i\d86/, /ppc/, /arm/ then 32
         end
       end