kirs

#!/bin/bash
# Pushes the current branch to origin and opens a tiny tmux split to track
# the CI status. Upon completion, speaks the status aloud using `say`.
set -e

if [ "$1" != "--wait" ]; then
  git push -u origin HEAD
  tmux split-window -dv -l 2 "'$0' --wait"
else
  ref="$(git rev-parse -q HEAD)"

kirs

Legacy Database

User.first.name # => "Renan"

After put encrypted_coder.rb and crypt.rb

User.first.name # => OpenSSL::Cipher::CipherError: bad decrypt

kirs

Using strace and lsof to debug blocked processes

You can use strace on a specific pid to figure out what a specific process is doing, e.g.:

strace -fp <pid>

You might see something like:

select(9, [3 5 8], [], [], {0, 999999}) = 0 (Timeout)

kirs

# Updated for Ruby 2.3
string_t = None

def get_rstring(addr):
  s = addr.cast(string_t.pointer())
  if s['basic']['flags'] & (1 << 13):
    return s['as']['heap']['ptr'].string()
  else:
    return s['as']['ary'].string()

kirs

# Capistrano configuration
# 
# require 'new_relic/recipes'         - Newrelic notification about deployment
# require 'capistrano/ext/multistage' - We use 2 deployment environment: staging and production.
# set :deploy_via, :remote_cache      - fetch only latest changes during deployment
# set :normalize_asset_timestamps     - no need to touch (date modification) every assets
# "deploy:web:disable"                - traditional maintenance page (during DB migrations deployment)
# task :restart                       - Unicorn with preload_app should be reloaded by USR2+QUIT signals, not HUP

kirs

apt update
apt upgrade
apt install build-essential
apt install pkg-config
apt install libnet-dev python-yaml libaio-dev
apt install libprotobuf-dev libprotobuf-c0-dev protobuf-c-compiler protobuf-compiler python-protobuf libnl-3-dev libcap-dev python-future

# criu install
curl -O -sSL http://download.openvz.org/criu/criu-3.10.tar.bz2
tar xjf criu-3.10.tar.bz2 

kirs

class Node
  attr_accessor :edges, :jobs, :id

  def initialize(id, arrivals_per_tick)
    @id = id
    @jobs = 0.0
    @tick = 0
    @edges = []
    @arrivals_per_tick = arrivals_per_tick
  end