bobstrange

Retrieve self information

instance_id

instance_id = `ec2-metadata --instance-id | sed 's/instance-id: //'`.chomp

bobstrange

Unicorn configuration

https://github.com/defunkt/unicorn/blob/422a657a5f6dfb69f44feabd6429f2904ca03fa8/Sandbox#L48-L55

before_exec do |server|
  ENV["BUNDLE_GEMFILE"] = "/var/www/html/my_application/Gemfile"
end

bobstrange

Refers

• Develop and Debug Atom Package
  • apm develop <package-name>
  • atom -d .

Short cuts

• Reload:
  • alt + cmd + ctrl + L
• Debugging console:
• alt + cmd + I

bobstrange

How to resolve ActiveRecord::FixtureClassNotFound error when you run unit test

Refers

rspec/rspec-rails#510

Example

We have Doctor and User model. We also have DoctorsUsers model to represent with the relationship between those two models.

bobstrange

Git

HEAD

HEAD is pointed current branch's newest commit. (also @ is pointed same)

See previous commit

# first commit before
git show HEAD^

bobstrange

# Returns rake routes like formatted string.
def get_formatted_routes_data(routes)
  inspector = ActionDispatch::Routing::RoutesInspector.new(all_routes)
  inspector.format(ActionDispatch::Routing::ConsoleFormatter.new, nil)
end

all_routes = Rails.application.routes.routes
data = get_formatted_routes(all_routes)

list = data.split("\n")

bobstrange

require 'aws-sdk'

TERMINAL_CODES = %w(
  request-canceled-and-instance-running
  marked-for-termination
  instance-terminated-by-price
  instance-terminated-by-user
  instance-terminated-no-capacity
  instance-terminated-capacity-oversubscribed
  instance-terminated-launch-group-constraint

bobstrange

require 'sshkit'
require 'sshkit/dsl'

HOST = '' # 'foo.domain'
USER = '' # 'ec2-user'
KEYS = [''] # '~/.ssh/id_rsa'

hoge = "hoge"
command = SSHKit::Command.new <<-EOF
  echo                # Need to place bare "echo".