Installing Nokogiri on OSX 10.10 Yosemite

Question

I recently upgrade to the 10.10 Yosemite beta, but I'm having trouble getting Nokogiri installed. I'm using RVM and Ruby 1.9.3. I've also followed the steps here and tried following the instructions on Nokogiri's homepage.

I've installed libxml2 (2.9.1) and libxslt (1.1.28) via homebrew, and have tried using the command line tools from both my Xcode 5 install and Xcode 6 beta.

gem install nokogiri -v '1.5.5'
Building native extensions.  This could take a while...
ERROR:  Error installing nokogiri:
    ERROR: Failed to build gem native extension.

        /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/bin/ruby extconf.rb
checking for libxml/parser.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
    --with-opt-dir
    --with-opt-include
    --without-opt-include=${opt-dir}/include
    --with-opt-lib
    --without-opt-lib=${opt-dir}/lib
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/bin/ruby
    --with-zlib-dir
    --without-zlib-dir
    --with-zlib-include
    --without-zlib-include=${zlib-dir}/include
    --with-zlib-lib
    --without-zlib-lib=${zlib-dir}/lib
    --with-iconv-dir
    --without-iconv-dir
    --with-iconv-include
    --without-iconv-include=${iconv-dir}/include
    --with-iconv-lib
    --without-iconv-lib=${iconv-dir}/lib
    --with-xml2-dir
    --without-xml2-dir
    --with-xml2-include
    --without-xml2-include=${xml2-dir}/include
    --with-xml2-lib
    --without-xml2-lib=${xml2-dir}/lib
    --with-xslt-dir
    --without-xslt-dir
    --with-xslt-include
    --without-xslt-include=${xslt-dir}/include
    --with-xslt-lib
    --without-xslt-lib=${xslt-dir}/lib
    --with-libxslt-config
    --without-libxslt-config
    --with-pkg-config
    --without-pkg-config
    --with-libxml-2.0-config
    --without-libxml-2.0-config
    --with-libiconv-config
    --without-libiconv-config
/Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:506:in `try_cpp'
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:970:in `block in find_header'
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
    from /Users/grantdavis/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/mkmf.rb:969:in `find_header'
    from extconf.rb:114:in `<main>'

Anyone have an idea on how to fix these install errors?

EDIT 6/10/14: After trying for a couple days to get Nokogiri installed on OSX 10.10, I ended up abandoning the task and restored 10.9 on my machine. Several libraries and bundles need to be updated in order to work in the 10.10 environment.

Answer 1

I managed to install Nokogiri under Yosemite (OS X 10.10 Preview).

Step 1: Install Brew

Skip this if brew was installed.

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Step 2: Install brew libs

brew tap homebrew/dupes
brew install libxml2 libxslt
brew install libiconv

Step 3: Download and install Apple Commandline Tools for 10.10

It's important that you need to restart after installation.

Link: command_line_tools_for_osx_10_10_june_2014.dmg

After restarted, you can check installation in Terminal:

> xcode-select --install
-> xcode-select: error: command line tools are already installed, use "Software Update" to install updates

This error means you have commandline tool installed correctly.

Installing Nokogiri

Try using n previous version 1.6.1 in your Gemfile, version 1.6.2.1 has issues currently with "10.10 Preview". It only works with my rbenv Ruby 2.0.0p247, failed to install on 2.1.1. You can give your existing Ruby versions a couple of tries.

gem install nokogiri  -v '1.6.1' -- --with-iconv-dir=/usr/local/Cellar/libiconv/1.14/