Support :freeze option for StringTemplate to support frozen string li…

…terals

CHANGELOG.md

@@ -6,6 +6,7 @@
 * Remove deprecated support for RedCarpet 1.x (jeremyevans)
 * Remove deprecated support for Tilt.current_template (jeremyevans)
 * Make Template#freeze_string_literals? work correctly with Template#compiled_path (jeremyevans)
+* Support :freeze option for StringTemplate to support frozen string literals (jeremyevans)
 
 ## 2.2.0 (2023-06-05)
 

lib/tilt/string.rb

@@ -7,6 +7,7 @@ module Tilt
   class StringTemplate < Template
     def prepare
       hash = "TILT#{@data.hash.abs}"
+      @freeze_string_literals = !!@options[:freeze]
       @code = String.new("<<#{hash}.chomp\n#{@data}\n#{hash}")
     end
 
@@ -18,5 +19,9 @@ def precompiled(locals)
       source, offset = super
       [source, offset + 1]
     end
+
+    def freeze_string_literals?
+      @freeze_string_literals
+    end
   end
 end

test/tilt_stringtemplate_test.rb

@@ -162,4 +162,11 @@
       assert_equal '6', line
     end
   end
+
+  if RUBY_VERSION >= '2.3'
+    it "uses frozen literal strings if :freeze option is used" do
+      template = Tilt::StringTemplate.new(nil, :freeze => true) { |t| '#{"".frozen?}' }
+      assert_equal "true", template.render
+    end
+  end
 end