Merge pull request #594 from koic/deprecate_safe_level_of_erb_new_in_ruby_2_6

Deprecate safe_level of ERB.new in Ruby 2.6

Author: rafaelfranca

lib/thor/actions/file_manipulation.rb

@@ -117,7 +117,13 @@ def template(source, *args, &block)
       context = config.delete(:context) || instance_eval("binding")
 
       create_file destination, nil, config do
-        content = CapturableERB.new(::File.binread(source), nil, "-", "@output_buffer").tap do |erb|
+        match = ERB.version.match(/(\d\.\d\.\d)/)
+        capturable_erb = if match && match[1] >= "2.2.0" # Ruby 2.6+
+          CapturableERB.new(::File.binread(source), :trim_mode => "-", :eoutvar => "@output_buffer")
+        else
+          CapturableERB.new(::File.binread(source), nil, "-", "@output_buffer")
+        end
+        content = capturable_erb.tap do |erb|
           erb.filename = source
         end.result(context)
         content = yield(content) if block