support xz compress format for packagetask

lib/rake/packagetask.rb

@@ -63,6 +63,9 @@ class PackageTask < TaskLib
     # is false).
     attr_accessor :need_tar_bz2
 
+    # True if a xz'd tar file (tar.xz) should be produced (default is false)
+    attr_accessor :need_tar_xz
+
     # True if a zip file should be produced (default is false)
     attr_accessor :need_zip
 
@@ -94,6 +97,7 @@ def init(name, version)
       @need_tar = false
       @need_tar_gz = false
       @need_tar_bz2 = false
+      @need_tar_xz = false
       @need_zip = false
       @tar_command = 'tar'
       @zip_command = 'zip'
@@ -120,7 +124,8 @@ def define
       [
         [need_tar, tgz_file, "z"],
         [need_tar_gz, tar_gz_file, "z"],
-        [need_tar_bz2, tar_bz2_file, "j"]
+        [need_tar_bz2, tar_bz2_file, "j"],
+        [need_tar_xz, tar_xz_file, "J"]
       ].each do |(need, file, flag)|
         if need
           task :package => ["#{package_dir}/#{file}"]
@@ -189,6 +194,12 @@ def tar_bz2_file
       "#{package_name}.tar.bz2"
     end
 
+    # The package name with .tar.xz added
+
+    def tar_xz_file
+      "#{package_name}.tar.xz"
+    end
+
     # The package name with .zip added
 
     def zip_file

test/test_rake_package_task.rb

@@ -19,6 +19,7 @@ def test_initialize
       p.need_tar = true
       p.need_tar_gz = true
       p.need_tar_bz2 = true
+      p.need_tar_xz = true
       p.need_zip = true
     }
 
@@ -32,6 +33,7 @@ def test_initialize
     assert Rake::Task['pkg/pkgr-1.2.3.tgz']
     assert Rake::Task['pkg/pkgr-1.2.3.tar.gz']
     assert Rake::Task['pkg/pkgr-1.2.3.tar.bz2']
+    assert Rake::Task['pkg/pkgr-1.2.3.tar.xz']
     assert Rake::Task['pkg/pkgr-1.2.3.zip']
     assert Rake::Task['pkg/pkgr-1.2.3']
     assert Rake::Task[:clobber_package]
@@ -76,4 +78,3 @@ def test_package_name_noversion
   end
 
 end
-