[ANN] nokogiri 1.8.0 Released

[Mike Dalessio]

Nokogiri version 1.8.0 has been released!

* http://nokogiri.org

* Installation: http://nokogiri.org/tutorials/installing_nokogiri.html

* Tutorials: http://nokogiri.org

* README: https://github.com/sparklemotion/nokogiri

* Mailing List: https://groups.google.com/group/nokogiri-talk

* Bug Reports: https://github.com/sparklemotion/nokogiri/issues

Nokogiri (鋸) is an HTML, XML, SAX, and Reader parser.

# 1.8.0 / 2017-06-04

## Backwards incompatibilities

This release ends support for Ruby 2.1 on Windows in the `x86-mingw32` and `x64-mingw32` platform gems (containing pre-compiled DLLs). Official support ended for Ruby 2.1 on 2017-04-01.

Please note that this deprecation note only applies to the precompiled Windows gems. Ruby 2.1 continues to be supported (for now) in the default gem when compiled on installation.

## Dependencies

* [Windows] Upgrade iconv from 1.14 to 1.15 (unless --use-system-libraries)

* [Windows] Upgrade zlib from 1.2.8 to 1.2.11 (unless --use-system-libraries)

* [MRI] Upgrade rake-compiler dependency from 0.9.2 to 1.0.3

* [MRI] Upgrade mini-portile2 dependency from `~> 2.1.0` to `~> 2.2.0`

## Compatibility notes

* [JRuby] Removed support for `jruby --1.8` code paths. [#1607] (Thanks, @kares!)

* [MRI Windows] Retrieve zlib source from http://zlib.net/fossils to avoid deprecation issues going forward. See #1632 for details around this problem.

## Features

* NodeSet#clone is not an alias for NodeSet#dup [#1503] (Thanks, @stephankaag!)

* Allow Processing Instructions and Comments as children of a document root. [#1033] (Thanks, @windwiny!)

* [MRI] PushParser#replace_entities and #replace_entities= will control whether entities are replaced or not. [#1017] (Thanks, @spraints!)

* [MRI] SyntaxError#to_s now includes line number, column number, and log level if made available by the parser. [#1304, #1637] (Thanks, @spk and @ccarruitero!)

* [MRI] Cross-built Windows gems now support Ruby 2.4

* [MRI] Support for frozen string literals. [#1413]

* [MRI] Support for installing Nokogiri on a machine in FIPS-enabled mode [#1544]

* [MRI] Vendored libraries are verified with SHA-256 hashes (formerly some MD5 hashes were used) [#1544]

* [JRuby] (performance) remove unnecessary synchronization of class-cache [#1563] (Thanks, @kares!)

* [JRuby] (performance) remove unnecessary cloning of objects in XPath searches [#1563] (Thanks, @kares!)

* [JRuby] (performance) more performance improvements, particularly in XPath, Reader, XmlNode, and XmlNodeSet [#1597] (Thanks, @kares!)

## Bugs

* HTML::SAX::Parser#parse_io now correctly parses HTML and not XML [#1577] (Thanks for the test case, @gregors!)

* Support installation on systems with a `lib64` site config. [#1562]

* [MRI] on OpenBSD, do not require gcc if using system libraries [#1515] (Thanks, @jeremyevans!)

* [MRI] XML::Attr.new checks type of Document arg to prevent segfaults. [#1477]

* [MRI] Prefer xmlCharStrdup (and friends) to strdup (and friends), which can cause problems on some platforms. [#1517] (Thanks, @jeremy!)

* [JRuby] correctly append a text node before another text node [#1318] (Thanks, @jkraemer!)

* [JRuby] custom xpath functions returning an integer now work correctly [#1595] (Thanks, @kares!)

* [JRuby] serializing (`#to_html`, `#to_s`, et al) a document with explicit encoding now works correctly. [#1281, #1440] (Thanks, @kares!)

* [JRuby] XML::Reader now returns parse errors [#1586] (Thanks, @kares!)

* [JRuby] Empty NodeSets are now decorated properly. [#1319] (Thanks, @kares!)

* [JRuby] Merged nodes no longer results in Java exceptions during XPath queries. [#1320] (Thanks, @kares!)