Robert May robotmay

This readme is a mixture of everything I read on SO+nokogiri wiki, which ultimately worked out for me.

Here are the steps which worked for me to get rid of segfaults with Nokogiri 1.4.4, on both Lion and Snow Leopard, with Ruby 1.8.7 (patchlevel 334 and +).

First diagnose which version of libxml2 you're using:

bundle exec nokogiri -v

If you have 2.7.3 listed somewhere, you're in bad waters (known to segfault). Install this:

Ruby on Rails development setup on Ubuntu 12.04

System update

# change mirror to ubuntu.osuosl.org first
sudo apt-get update

Install common libraries

sudo apt-get install build-essential libreadline-dev libssl-dev zlib1g-dev libxml2-dev libxslt-dev

Jim Weirich:

This is how I explain it… Ruby has Procs and Lambdas. Procs are created with Proc.new { }, lambdas are created with lambda {} and ->() {}.

In Ruby 1.8, proc {} creates lambda, and Ruby 1.9 it creates procs (don't ask).

Lambdas use method semantics when handling parameters, procs use assignment semantics when handling parameters.

This means lambdas, like methods, will raise an ArgumentError when called with fewer arguments than they were defined with. Procs will simply assign nil to variables for arguments that were not passed in.

Install dependincies

apt-get install  git-core build-essential pkg-config libtool libevent-dev libncurses-dev zlib1g-dev automake libssh-dev cmake ruby

Install msgpack >= 1.2.0

cd /tmp
git clone https://github.com/msgpack/msgpack-c.git
./create_keys.sh

	# using rvm with ruby-1.8.7-p249

	# latest version 2.7.7 2010-06-17
	brew install libxml2

	# installing libxslt from source code
	wget ftp://xmlsoft.org/libxml2/libxslt-1.1.26.tar.gz
	./configure --prefix=/usr/local/Cellar/libxslt/1.1.26 --with-libxml-prefix=/usr/local/Cellar/libxml2/2.7.7
	make
	sudo make install

	# Update, upgrade and install development tools:
	apt-get update
	apt-get -y upgrade
	apt-get -y install build-essential git-core curl libssl-dev \
	libreadline5 libreadline5-dev \
	zlib1g zlib1g-dev \
	libmysqlclient-dev \
	libcurl4-openssl-dev \
	libxslt-dev libxml2-dev

	module SoftDelete
	extend ActiveSupport::Concern

	included do
	define_model_callbacks :soft_delete
	define_model_callbacks :recover
	default_scope where(:deleted_at => nil)
	class_eval do
	class << self
	alias_method :with_deleted, :unscoped

	rivets.configure({
	adapter: {
	subscribe: function(obj, keypath, callback) {
	obj.on("change:" + keypath, callback);
	},

	unsubscribe: function(obj, keypath, callback) {
	obj.off("change:" + keypath, callback);
	},

	’Twas brillig, and the slithy git repos
	Did gyre and gimble in the wecks:
	All mimsy were the borogoves,
	And the mome raths Mutex.

	“Beware the legacy code, my son!
	The classes that bite, the patches that catch!
	Beware the Gemfile.lock, and shun
	The frumious monkey patch!”

	.input.required
	= f.label :rate_plan_id
	= f.grouped_collection_select :rate_plan_id, RatePlan.roots, :children, :name, :id, :name, {:include_blank => true}