Add support for XZ compression in repomd-parser

Gemfile.lock

@@ -0,0 +1,106 @@
+PATH
+  remote: .
+  specs:
+    repomd_parser (1.2.0)
+      bzip2-ffi (~> 1.1.1)
+      nokogiri (~> 1.8)
+      ruby-xz (~> 1.0, >= 1.0.3)
+      zstd-ruby (~> 1.3, >= 1.3.5.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.4.3)
+    bzip2-ffi (1.1.1)
+      ffi (~> 1.0)
+    diff-lcs (1.6.2)
+    docile (1.4.1)
+    ffi (1.17.2-aarch64-linux-gnu)
+    ffi (1.17.2-aarch64-linux-musl)
+    ffi (1.17.2-arm-linux-gnu)
+    ffi (1.17.2-arm-linux-musl)
+    ffi (1.17.2-arm64-darwin)
+    ffi (1.17.2-x86_64-darwin)
+    ffi (1.17.2-x86_64-linux-gnu)
+    ffi (1.17.2-x86_64-linux-musl)
+    json (2.16.0)
+    nokogiri (1.18.10-aarch64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.10-aarch64-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.18.10-arm-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.10-arm-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.18.10-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.10-x86_64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.10-x86_64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.10-x86_64-linux-musl)
+      racc (~> 1.4)
+    parallel (1.27.0)
+    parser (3.3.10.0)
+      ast (~> 2.4.1)
+      racc
+    racc (1.8.1)
+    rainbow (3.1.1)
+    rake (13.3.1)
+    regexp_parser (2.11.3)
+    rexml (3.4.4)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.7)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.6)
+    rubocop (1.25.0)
+      parallel (~> 1.10)
+      parser (>= 3.1.0.0)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml
+      rubocop-ast (>= 1.15.1, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.17.0)
+      parser (>= 3.1.1.0)
+    ruby-progressbar (1.13.0)
+    ruby-xz (1.0.3)
+    simplecov (0.16.1)
+      docile (~> 1.1)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.2)
+    unicode-display_width (2.6.0)
+    zstd-ruby (1.5.7.1)
+
+PLATFORMS
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
+  x86_64-darwin
+  x86_64-linux-gnu
+  x86_64-linux-musl
+
+DEPENDENCIES
+  bundler (>= 1.16)
+  rake (~> 13.0)
+  repomd_parser!
+  rspec (~> 3.0)
+  rubocop (<= 1.25)
+  rubocop-ast (<= 1.17.0)
+  simplecov (~> 0.16.1)
+
+BUNDLED WITH
+   2.6.2

lib/repomd_parser.rb

@@ -25,13 +25,15 @@
 
 require 'zlib'
 require 'bzip2/ffi'
+require 'xz'
 
 module RepomdParser
   def self.decompress_io(io_object, filename)
     case File.extname(filename)
     when '.gz' then Zlib::GzipReader.new(io_object)
     when '.zst' then RepomdParser::ZstdReader.new(io_object)
     when '.bz2' then Bzip2::FFI::Reader.open(io_object)
+    when '.xz' then XZ::StreamReader.open(io_object)
     else io_object
     end
   end

lib/repomd_parser/version.rb

@@ -16,5 +16,5 @@
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 module RepomdParser
-  VERSION = '1.1.0'.freeze
+  VERSION = '1.2.0'.freeze
 end

repomd_parser.gemspec

@@ -36,4 +36,5 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'bzip2-ffi', '~> 1.1.1'
   spec.add_dependency 'nokogiri', '~> 1.8'
   spec.add_dependency 'zstd-ruby', '~> 1.3', '>= 1.3.5.0'
+  spec.add_dependency 'ruby-xz', ' ~>1.0', '>= 1.0.3' 
 end

spec/lib/repomd_parser/primary_xml_parser_spec.rb

@@ -108,6 +108,19 @@
         expect(parsed_files).to eq(expected_result)
       end
     end
+    context 'XML compressed with XZ' do
+      let(:parsed_files) do
+        described_class.new.parse_file(
+          file_fixture(
+            'dummy_repo/repodata/abf421e45af5cd686f050bab3d2a98e0a60d1b5ca3b07c86cb948fc1abfa675e-primary.xml.xz'
+          )
+        )
+      end
+
+      it 'references rpm files' do
+        expect(parsed_files).to eq(expected_result)
+      end
+    end
 
     context 'plain XML' do
       let(:parsed_files) do