Added backwards compat override to Dir class

install-discord-linux.rb

@@ -30,6 +30,15 @@ class Dir
       output_path
     end
   end
+
+  ## For backwards compat
+  def chdir(dir = nil &block)
+    if dir.nil?
+      Dir.chdir(self, &block)
+    else
+      Dir.chdir(dir, &block)
+    end
+  end
 end
 
 class String
@@ -170,7 +179,7 @@ class Installer
     file_contents = Net::HTTP.get(uri)
     output_file = "discord-#{version}.tar.gz"
     puts "download_installer: Output file will #{output_file}"
-    Dir.chdir($CONFIG[:install_dir]) do 
+    $CONFIG[:install_dir].chdir do 
       File.open(output_file, 'wb') do |file|
         file.write(file_contents)
       end
@@ -181,7 +190,7 @@ class Installer
   def install
     installer_file = "discord-#{self.remote_version}.tar.gz"
     puts "do_install: Extracting new installer"
-    Dir.chdir($CONFIG[:install_dir]) do 
+    $CONFIG[:install_dir].chdir do 
       File.open(installer_file, 'rb') do |file|
         Gem::Package.new("").extract_tar_gz(file, $CONFIG[:install_dir])
       end
@@ -249,7 +258,7 @@ def make_backup
   end
 
   Dir.chdir(Dir.home) do 
-    puts "make_backup: Beginning backup process (OUTPUT_FILE = #{Dir.getwd}/#{$CONFIG[:backup_filename]})"
+    puts "make_backup: Beginning backup process (OUTPUT_FILE = #{Dir.getwd/$CONFIG[:backup_filename]})"
     File.open($CONFIG[:backup_filename], "wb") do |backup_file|
       Zlib::GzipWriter.wrap(backup_file) do |gzip|
         Gem::Package::TarWriter.new(gzip) do |tar|