jtimberman

Immutable Ruby

Libraries I talked about

• ice_nine: Deep freeze ruby objects
• Values: Simple immutable value objects for ruby
• immutable_attributes: specify attributes within an ActiveRecord model that can be set but not modified
• hamster: Efficient, Immutable, Thread-Safe Collection classes for Ruby

Next Steps

jtimberman

#!/bin/bash
#
# Author:: Joshua Timberman <joshua@opscode.com>
#
# Copyright (c) 2013, Opscode, Inc. <legal@opscode.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#

jtimberman

#
# Author:: Joshua Timberman <joshua@opscode.com>
#
# Copyright (c) 2013, Opscode, Inc. <legal@opscode.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0

ranjib

require 'nokogiri'
require 'restclient'

Nokogiri::HTML(RestClient.get('https://github.com/opscode-cookbooks/')).
 css('ul.repolist h3 a').collect{|n| n.attribute('href').value}.each do |s|
  system "git clone http://github.com#{s}"
end
  

arangamani

# In Chef, when a resource is defined all its variables are evaluated during
# compile time and the execution of the resource takes place in converge phase.
# So if the value of a particular attribute is changed in converge
# (and not in compile) the resource will be executed with the old value.

# Example problem:
# Let's consider this situation where there are two steps involved in a recipe
# Step 1 is a Ruby block that changes a node attribute. Rubyblocks get executed
# in converge phase
# Step 2 is a Chef resource that makes use of the node attribute that was

ahoward

# the entire concept of building a dsl means defining domain terms on an
# object, it's so much simpler to start with the dsl itself being a blank
# slate that simply relays certain methods to a scope
#
  class DSL
    instance_methods.each do |m|
      undef_method m unless m[%r/\A__|\Aobject_id\Z/]
    end

teknogeek0

IPTABLES="/sbin/iptables"

### block all Asian/APNIC IPs (includes NZ, AU)
$IPTABLES -A bad_stuff -s 58.0.0.0/8 -j DROP
$IPTABLES -A bad_stuff -s 59.0.0.0/8 -j DROP
$IPTABLES -A bad_stuff -s 60.0.0.0/8 -j DROP
$IPTABLES -A bad_stuff -s 61.0.0.0/8 -j DROP
$IPTABLES -A bad_stuff -s 110.0.0.0/8 -j DROP
$IPTABLES -A bad_stuff -s 111.0.0.0/8 -j DROP
$IPTABLES -A bad_stuff -s 112.0.0.0/8 -j DROP

btm

#!/usr/bin/env ruby
# Copyright 2012 Opscode <legal@opscode.com>
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at

juanje

This is a little trick I use to spin up the packages instalation on Debian/Ubuntu boxes in Vagrant.

I add a simple function that checks if a directory named something similar to ~/.vagrant.d/cache/apt/opscode-ubuntu-12.04/partial (it may have another path in Windows or MacOS) and create the directory if it doesn't already exist.

def local_cache(basebox_name)
  cache_dir = Vagrant::Environment.new.home_path.join('cache', 'apt', basebox_name)
  partial_dir = cache_dir.join('partial')
  partial_dir.mkdir unless partial_dir.exist?
 cache_dir

piscisaureus

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this: