Move FormulaInstaller check to extend/os

Library/Homebrew/extend/os/formula_installer.rb

@@ -0,0 +1,8 @@
+# typed: strict
+# frozen_string_literal: true
+
+if OS.mac?
+  require "extend/os/mac/formula_installer"
+elsif OS.linux?
+  require "extend/os/linux/formula_installer"
+end

Library/Homebrew/extend/os/linux/formula_installer.rb

@@ -0,0 +1,12 @@
+# typed: true
+# frozen_string_literal: true
+
+class FormulaInstaller
+  undef fresh_install?
+
+  sig { params(formula: Formula).returns(T.nilable(T::Boolean)) }
+  def fresh_install?(formula)
+    !Homebrew::EnvConfig.developer? &&
+      (!installed_as_dependency? || !formula.any_version_installed?)
+  end
+end

Library/Homebrew/extend/os/mac/formula_installer.rb

@@ -0,0 +1,12 @@
+# typed: true
+# frozen_string_literal: true
+
+class FormulaInstaller
+  undef fresh_install?
+
+  sig { params(formula: Formula).returns(T.nilable(T::Boolean)) }
+  def fresh_install?(formula)
+    !Homebrew::EnvConfig.developer? && !OS::Mac.version.outdated_release? &&
+      (!installed_as_dependency? || !formula.any_version_installed?)
+  end
+end

Library/Homebrew/formula_installer.rb

@@ -258,9 +258,7 @@ class FormulaInstaller
       # don't want to complain about no bottle available if doing an
       # upgrade/reinstall/dependency install (but do in the case the bottle
       # check fails)
-      elsif !Homebrew::EnvConfig.developer? &&
-            (!installed_as_dependency? || !formula.any_version_installed?) &&
-            (!OS.mac? || !OS::Mac.version.outdated_release?)
+      elsif fresh_install?(formula)
         <<~EOS
           #{formula}: no bottle available!
         EOS
@@ -343,6 +341,11 @@ class FormulaInstaller
           "#{formula.full_name} requires the latest version of pinned dependencies"
   end
 
+  sig { params(_formula: Formula).returns(T.nilable(T::Boolean)) }
+  def fresh_install?(_formula)
+    false
+  end
+
   sig { void }
   def install_fetch_deps
     return if @compute_dependencies.blank?