handle libxslt built without date-time functionality

- expose this compile-time config as Nokogiri::VERSION_INFO["libxslt"]["datetime_enabled"]
- skip the assertion that depends on this behavior

CHANGELOG.md

@@ -16,6 +16,10 @@ Please also note that the `Nokogiri::HTML` parse methods still use libxml2's HTM
 
 Many thanks to Sam Ruby, Steve Checkoway, and Craig Barnes for creating and maintaining Nokogumbo and supporting the Gumbo HTML5 parser. They're now Nokogiri core contributors with all the powers and privileges pertaining thereto. 🙌
 
+#### Other
+
+* [CRuby] `Nokogiri::VERSION_INFO["libxslt"]["datetime_enabled"]` is a new boolean value which describes whether libxslt (or, more properly, libexslt) has compiled-in datetime support. This generally going to be `true`, but some distros ship without this support (e.g., some mingw UCRT-based packages, see https://github.com/msys2/MINGW-packages/pull/8957). See [#2272](https://github.com/sparklemotion/nokogiri/issues/2272) for more details.
+
 
 ### Changed
 

ext/nokogiri/nokogiri.c

@@ -218,6 +218,13 @@ Init_nokogiri()
 #endif
 
   xmlInitParser();
+  exsltRegisterAll();
+
+  if (xsltExtModuleFunctionLookup((xmlChar*)"date-time", EXSLT_DATE_NAMESPACE)) {
+    rb_const_set(mNokogiri, rb_intern("LIBXSLT_DATETIME_ENABLED"), Qtrue);
+  } else {
+    rb_const_set(mNokogiri, rb_intern("LIBXSLT_DATETIME_ENABLED"), Qfalse);
+  }
 
   cNokogiriSyntaxError = rb_define_class_under(mNokogiri, "SyntaxError", rb_eStandardError);
   noko_init_xml_syntax_error();

ext/nokogiri/xslt_stylesheet.c

@@ -64,7 +64,6 @@ parse_stylesheet_doc(VALUE klass, VALUE xmldocobj)
   VALUE errstr, exception;
   xsltStylesheetPtr ss ;
   Data_Get_Struct(xmldocobj, xmlDoc, xml);
-  exsltRegisterAll();
 
   errstr = rb_str_new(0, 0);
   xsltSetGenericErrorFunc((void *)errstr, xslt_generic_error_handler);

lib/nokogiri/version/info.rb

@@ -52,6 +52,10 @@ def libxml2_has_iconv?
       defined?(Nokogiri::LIBXML_ICONV_ENABLED) && Nokogiri::LIBXML_ICONV_ENABLED
     end
 
+    def libxslt_has_datetime?
+      defined?(Nokogiri::LIBXSLT_DATETIME_ENABLED) && Nokogiri::LIBXSLT_DATETIME_ENABLED
+    end
+
     def libxml2_using_packaged?
       libxml2? && Nokogiri::PACKAGED_LIBRARIES
     end
@@ -151,6 +155,7 @@ def to_hash
             else
               libxslt["source"] = "system"
             end
+            libxslt["datetime_enabled"] = libxslt_has_datetime?
             libxslt["compiled"] = compiled_libxslt_version.to_s
             libxslt["loaded"] = loaded_libxslt_version.to_s
           end

test/test_version.rb

@@ -59,6 +59,7 @@ def test_version_info_for_libxml
     assert_equal("#{major}.#{minor}.#{bug}", Nokogiri::VERSION_INFO["libxml"]["loaded"])
 
     assert(version_info["libxml"].key?("iconv_enabled"))
+    assert(version_info["libxslt"].key?("datetime_enabled"))
   end
 
   def test_version_info_for_libxslt

test/test_xslt_transforms.rb

@@ -218,10 +218,12 @@ def test_exslt
 
       assert_equal("func-result", result_doc.at("/root/function").content)
       assert_equal(3, result_doc.at("/root/max").content.to_i)
-      assert_match(
-        /\d{4}-\d\d-\d\d([-|+]\d\d:\d\d)?/,
-        result_doc.at("/root/date").content
-      )
+      if Nokogiri::VersionInfo.instance.libxslt_has_datetime?
+        assert_match(
+          /\d{4}-\d\d-\d\d([-|+]\d\d:\d\d)?/,
+          result_doc.at("/root/date").content
+        )
+      end
       result_doc.xpath("/root/params/*").each do |p|
         assert_equal(p.content, params[p.name.intern])
       end