sgonyea

A Capistrano Rails Guide

by Jonathan Rochkind, http://bibwild.wordpress.com

why cap?

Capistrano automates pushing out a new version of your application to a deployment location.

I've been writing and deploying Rails apps for a while, but I avoided using Capistrano until recently. I've got a pretty simple one-host deployment, and even though everyone said Capistrano was great, every time I tried to get started I just got snowed under not being able to figure out exactly what I wanted to do, and figured I wasn't having that much trouble doing it "manually".

sgonyea

"12345678".gsub!(/(?=(\d\d\d)+$)(?<=\d)/, ',')

sgonyea

The following works:

openssl s_client -key private_key.key -cert cert.crt -connect "client-auth.myhost.com:443"

wget --no-check-certificate --certificate=cert.crt --private-key=private_key.key https://client-auth.myhost.com:443/path

Yet curl does not seem to work:

curl -v -s -k --key private_key.key --cert cert.crt "https://client-auth.myhost.com:443/path"

sgonyea

#!/usr/bin/env ruby

# I believe 'en1' is the default WiFi device name on Mac OS X. It's what mine is set to.
def device; @device ||= ARGV[0] || "en1" end

def ip_set?
  ip = `ipconfig getifaddr #{device}`

  return false if ip.empty?
  return false if ip.start_with?("169")

sgonyea

# In Python:
from collections import defaultdict

def infinite_cache():
    cache = lambda: defaultdict(cache)
    return cache()

cache = infinite_cache()

sgonyea

def hash_counter(default=nil)
  Hash.new{ |k,v| k[v] = block_given? ? yield : default }
end

counts = {
  :sl => {
    :absent => hash_counter(0),
    :missing_data => hash_counter { hash_counter(0) },
    :present_data => hash_counter { hash_counter(0) },
  },

sgonyea

Padrino::Logger::Config[:production][:log_level]        = :info
Padrino::Logger::Config[:production][:stream]           = :to_file
Padrino::Logger::Config[:production][:format_datetime]  = " [%Y-%m-%d %H:%M:%S] "

Padrino::Logger::Config[:development][:stream]          = :to_file
Padrino::Logger::Config[:development][:format_datetime] = " [%Y-%m-%d %H:%M:%S] "

Padrino::Logger::Config[:uat]     = Padrino::Logger::Config[:production]
Padrino::Logger::Config[:staging] = Padrino::Logger::Config[:production]
Padrino::Logger::Config[:qa]      = Padrino::Logger::Config[:production]

sgonyea

platform :jruby do
  gem 'jruby-openssl'
  gem 'ffi-ncurses'
  gem 'activerecord-jdbcsqlite3-adapter'
end

sgonyea

# Surely there is a better way than this. You can do grep:
#   grep --color='auto' -P -n "[\x80-\xFF]"


def string_has_non_ascii_chars?(string)
  begin
    string.encode("US-ASCII")
    return false
  rescue Encoding::InvalidByteSequenceError => e
    return true

sgonyea

grep --color='auto' -P -n "[\x80-\xFF]"