create: add license field as parsable arg

Library/Homebrew/dev-cmd/create.rb

@@ -45,8 +45,11 @@ module Homebrew
              description: "Explicitly set the <name> of the new formula."
       flag   "--set-version=",
              description: "Explicitly set the <version> of the new formula."
+      flag   "--set-license=",
+             description: "Explicitly set the <license> of the new formula."
       flag   "--tap=",
              description: "Generate the new formula within the given tap, specified as <user>`/`<repo>."
+
       switch :force
       switch :verbose
       switch :debug
@@ -66,11 +69,13 @@ module Homebrew
 
     version = args.set_version
     name = args.set_name
+    license = args.set_license
     tap = args.tap
 
     fc = FormulaCreator.new
     fc.name = name
     fc.version = version
+    fc.license = license
     fc.tap = Tap.fetch(tap || "homebrew/core")
     raise TapUnavailableError, tap unless fc.tap.installed?
 

Library/Homebrew/formula_creator.rb

@@ -5,8 +5,8 @@ require "erb"
 
 module Homebrew
   class FormulaCreator
-    attr_reader :url, :sha256, :desc, :homepage, :license
-    attr_accessor :name, :version, :tap, :path, :mode
+    attr_reader :url, :sha256, :desc, :homepage
+    attr_accessor :name, :version, :tap, :path, :mode, :license
 
     def url=(url)
       @url = url
@@ -49,6 +49,7 @@ module Homebrew
     end
 
     def generate!
+      p "generate"
       raise "#{path} already exists" if path.exist?
 
       if version.nil? || version.null?