Stash base dir paths in module constants

lib/rouge.rb

@@ -6,6 +6,10 @@
 
 # The containing module for Rouge
 module Rouge
+  # cache value in a constant since `__dir__` allocates a new string
+  # on every call.
+  LIB_DIR = __dir__.freeze
+
   class << self
     def reload!
       Object.send :remove_const, :Rouge
@@ -36,11 +40,11 @@ def highlight(text, lexer, formatter, &b)
 
 # mimic Kernel#require_relative API
 def load_relative(path)
-  load File.join(__dir__, "#{path}.rb")
+  load File.join(Rouge::LIB_DIR, "#{path}.rb")
 end
 
 def lexer_dir(path = '')
-  File.join(__dir__, 'rouge', 'lexers', path)
+  File.join(Rouge::LIB_DIR, 'rouge/lexers', path)
 end
 
 load_relative 'rouge/version'

lib/rouge/lexer.rb

@@ -505,12 +505,13 @@ def self.detect?(text)
   end
 
   module Lexers
+    BASE_DIR = "#{__dir__}/lexers".freeze
     @_loaded_lexers = {}
 
     def self.load_lexer(relpath)
       return if @_loaded_lexers.key?(relpath)
       @_loaded_lexers[relpath] = true
-      load File.join(__dir__, 'lexers', relpath)
+      load File.join(BASE_DIR, relpath)
     end
   end
 end

lib/rouge/lexers/apache.rb

@@ -15,7 +15,7 @@ class << self
         attr_reader :keywords
       end
       # Load Apache keywords from separate YML file
-      @keywords = ::YAML.load_file(File.join(__dir__, 'apache/keywords.yml')).tap do |h|
+      @keywords = ::YAML.load_file(File.join(Lexers::BASE_DIR, 'apache/keywords.yml')).tap do |h|
         h.each do |k,v|
           h[k] = Set.new v
         end

lib/rouge/lexers/gherkin.rb

@@ -19,7 +19,7 @@ def self.detect?(text)
 
       # self-modifying method that loads the keywords file
       def self.keywords
-        load File.join(__dir__, 'gherkin/keywords.rb')
+        load File.join(Lexers::BASE_DIR, 'gherkin/keywords.rb')
         keywords
       end
 

lib/rouge/lexers/isbl.rb

@@ -10,7 +10,7 @@ class ISBL < RegexLexer
       filenames '*.isbl'
 
       def self.builtins
-        load File.join(__dir__, 'isbl/builtins.rb')
+        load File.join(Lexers::BASE_DIR, 'isbl/builtins.rb')
         self.builtins
       end
 

lib/rouge/lexers/lasso.rb

@@ -39,7 +39,7 @@ class << self
       end
 
       # Load Lasso keywords from separate YML file
-      @keywords = ::YAML.load_file(File.join(__dir__, 'lasso/keywords.yml')).tap do |h|
+      @keywords = ::YAML.load_file(File.join(Lexers::BASE_DIR, 'lasso/keywords.yml')).tap do |h|
         h.each do |k,v|
           h[k] = Set.new v
         end

lib/rouge/lexers/lua.rb

@@ -25,7 +25,7 @@ def self.detect?(text)
       end
 
       def self.builtins
-        load File.join(__dir__, 'lua/builtins.rb')
+        load File.join(Lexers::BASE_DIR, 'lua/builtins.rb')
         self.builtins
       end
 

lib/rouge/lexers/mathematica.rb

@@ -56,7 +56,7 @@ def self.keywords
 
       # The list of built-in symbols comes from a wolfram server and is created automatically by rake
       def self.builtins
-        load File.join(__dir__, 'mathematica/builtins.rb')
+        load File.join(Lexers::BASE_DIR, 'mathematica/builtins.rb')
         self.builtins
       end
 

lib/rouge/lexers/matlab.rb

@@ -20,7 +20,7 @@ def self.keywords
 
       def self.builtins
         # Load Matlab keywords from separate YML file
-        @builtins ||= ::YAML.load_file(File.join(__dir__, 'matlab/builtins.yml')).tap do |a|
+        @builtins ||= ::YAML.load_file(File.join(Lexers::BASE_DIR, 'matlab/builtins.yml')).tap do |a|
           Set.new a
         end
       end

lib/rouge/lexers/php.rb

@@ -29,7 +29,7 @@ def initialize(*)
       end
 
       def self.builtins
-        load File.join(__dir__, 'php/builtins.rb')
+        load File.join(Lexers::BASE_DIR, 'php/builtins.rb')
         self.builtins
       end
 

lib/rouge/lexers/sqf.rb

@@ -55,7 +55,7 @@ def self.diag_commands
       end
 
       def self.commands
-        load File.join(__dir__, "sqf/commands.rb")
+        load File.join(Lexers::BASE_DIR, "sqf/commands.rb")
         @commands = self.commands
       end
 

lib/rouge/lexers/viml.rb

@@ -14,7 +14,7 @@ class VimL < RegexLexer
       mimetypes 'text/x-vim'
 
       def self.keywords
-        load File.join(__dir__, 'viml/keywords.rb')
+        load File.join(Lexers::BASE_DIR, 'viml/keywords.rb')
         self.keywords
       end