Remove fileutils

Changelog.md

@@ -7,6 +7,12 @@ Enhancements:
   in commented out section of `spec_helper` rather than `.rspec` so users
   have to consciously opt-in to the setting. (Andrew Hooker, #1572)
 
+Bug Fixes:
+
+* Remove dependency on `FileUtils` from the standard library so that users do
+  not get false positives where their code relies on it but they are not
+  requiring it. (Sam Phippen, #1565)
+
 ### 3.0.1 Development
 [Full Changelog](http://github.com/rspec/rspec-core/compare/v3.0.0...3-0-maintenance)
 

lib/rspec/core/configuration.rb

@@ -1,5 +1,3 @@
-require 'fileutils'
-
 RSpec::Support.require_rspec_core "backtrace_formatter"
 RSpec::Support.require_rspec_core "ruby_project"
 RSpec::Support.require_rspec_core "formatters/deprecation_formatter"

lib/rspec/core/formatters.rb

@@ -1,3 +1,4 @@
+RSpec::Support.require_rspec_support "directory_maker"
 # ## Built-in Formatters
 #
 # * progress (default) - prints dots for passing examples, `F` for failures, `*` for pending
@@ -232,7 +233,7 @@ def underscore(camel_cased_word)
     end
 
     def file_at(path)
-      FileUtils.mkdir_p(File.dirname(path))
+      RSpec::Support::DirectoryMaker.mkdir_p(File.dirname(path))
       File.new(path, 'w')
     end
   end

lib/rspec/core/project_initializer.rb

@@ -1,3 +1,5 @@
+RSpec::Support.require_rspec_support "directory_maker"
+
 module RSpec
   module Core
     # @private
@@ -28,7 +30,7 @@ def copy_template(file)
         return report_exists(file) if File.exist?(destination_file)
 
         report_creating(file)
-        FileUtils.mkdir_p(File.dirname(destination_file))
+        RSpec::Support::DirectoryMaker.mkdir_p(File.dirname(destination_file))
         File.open(destination_file, 'w') do |f|
           f.write File.read(File.join(template_path, file))
         end