jongio

docker run --privileged -it -v /var/run/docker.sock:/var/run/docker.sock jongallant/ubuntu-docker-client 
docker run --net=host --ipc=host --uts=host --pid=host -it --security-opt=seccomp=unconfined --privileged --rm -v /:/host alpine /bin/sh
chroot /host

jtimberman

Prerequisites

You'll need to have a system running that is accessible through a DNS record. It should have access to the public Habitat depot, https://app.habitat.sh so it can download the required packages.

You'll need to register an OAuth application for GitHub. You need the client ID and client secret that are created for the application later in this guide. Your system needs to have access to https://github.com so that it can authenticate.

Your system also needs to have an FQDN that can be resolved, for example depot.example.com. This will be used in your OAuth application's "Authorization Callback URL." For this example, use http://depot.example.com/#/sign-in. The /#/sign-in is required.

Operating System

smith

Habitat Notes

Things I'm learning while using Habitat, written down so I remember them.

Cache artifacts in a Mac studio

export HAB_DOCKER_OPTS="-v /Users/nathansmith/.hab/cache/artifacts /hab/studios/src/hab/cache/artifacts"

Find reverse dependencies for a package

bobuss

ENV=env
SRC_CORE=src

CLOC=$(shell which cloc)

test-all: clean pep8 cloc init-coverage test-unit test-functionnal test-integration report-coverage flake8 lint clone

pep8:
    $(ENV)/bin/pep8 --max-line-length=99 $(SRC_CORE) > pep8.log || :

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

aaronjensen

#!/usr/bin/env ruby
Dir.chdir File.join(__FILE__, "../..")

unless ENV['EDITOR']
  puts "No EDITOR found. Try:"
  puts "export EDITOR=vim"
  exit 1
end

unless ARGV.count == 2

mlafeldt

We couldn’t find that file to show.

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

markbirbeck

#
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Seth Chisamore (<schisamo@opscode.com>)
# Copyright:: Copyright (c) 2010-2011 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# 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
#

benpickles

#!/usr/bin/env ruby

dry_run = ARGV.delete('--dry-run')
force = ARGV.delete('--force')

if ARGV.empty?
  puts <<-USAGE
  minify, swiftly concat and minify JavaScript files from the command line

  Pass a single argument to create a .min.js version: