forbidden-license: include method in module scope for module-wide access

Library/Homebrew/cmd/install.rb

@@ -342,10 +342,13 @@ module Homebrew
   rescue CannotInstallFormulaError => e
     ofail e.message
   end
+
+  def get_forbidden_licenses
+    Homebrew::EnvConfig.forbidden_licenses.split(" ")
   end
 
   def forbidden_license_check(f)
-  forbidden_licenses = ENV["HOMEBREW_FORBIDDEN_LICENSES"].split(" ")
+    forbidden_licenses = get_forbidden_licenses
 
     if forbidden_licenses.include? f.license
       raise CannotInstallFormulaError, <<~EOS
@@ -363,3 +366,7 @@ def forbidden_license_check(f)
       EOS
     end
   end
+
+end
+
+

Library/Homebrew/formula_installer.rb

@@ -148,6 +148,8 @@ class FormulaInstaller
   def prelude
     Tab.clear_cache
     verify_deps_exist unless ignore_deps?
+    Homebrew.forbidden_license_check(formula) unless ENV["HOMEBREW_FORBIDDEN_LICENSES"].blank?
+
     check_install_sanity
   end