My Pragmatic life

vpn-fuse aka kill this app when vpn fails

pragmatig — Mon, 06 Feb 2012 05:43:56 +0000

Lets say you are running something over VPN,
and VPN suddenly fails, then this will kill the app you dont want to connect via the normal interface.

Its just a small ruby script you can put into e.g. /usr/bin/

vpn-fuse VpnName 'killall secret-app'
vpn-fuse BankNetwork 'killall bank-client'
vpn-fuse iPredator 'killall transmission-gtk'
...

so far only tested on Ubuntu…

vpn-fuse

Tagged: Ruby, VPN

XMarks for all mobile browsers

pragmatig — Sun, 05 Feb 2012 05:30:10 +0000

Need your bookmarks on the go !?

https://mymarks.heroku.com

the source is at https://github.com/grosser/mymarks, happy forking

Do not show I18n missing translation tooltips in production

pragmatig — Sat, 04 Feb 2012 03:41:54 +0000

Problem:
Lots of stuff does not need any translation, so we simply leave it untranslated (e.g. firstname shows as Firstname). But this leaves ugly “missing translation” spans in out html.
Instead of entering senseless translations for everything thats missing, we simply deactivate the tooltips in production, while also avoiding raising/rescuing theses MissingTranslation errors to improve performance(rescue/raise is not cheap).

Code:

# http://grosser.it/2012/02/04/do-not-show-i18n-missing-translation-tooltips-in-production/
# config/initializers/disable_i18n_tooltips.rb
# missing translations
# - Do not show tooltips in production/test
# - Do not raise ( speedup) for every missing translations
I18n::Backend::Base.class_eval do
  def translate_with_default(locale, key, options = {})
    if options[:rescue_format] == :html && ['test','production'].include?(Rails.env)
      default = key.to_s.gsub('_', ' ').gsub(/\b('?[a-z])/) { $1.capitalize }
      options.reverse_merge!(default: default)
    end
    translate_without_default(locale, key, options)
  end

  alias_method_chain :translate, :default
end

Tagged: I18n, Rails, Ruby

parallel_split_test — Split slow tests into multiple chunks and run them in parallel

pragmatig — Sat, 04 Feb 2012 03:31:24 +0000

If you want to run 1 big/slow test file, use Parallel-Split-Test, it splits it into multiple chunks and then runs them in parallel.

PS: If you have lots of tests you should take a look at Parallel-Tests, which runs multiple files in parallel.

This became necessary because in our current project: spec runtime=3h (without integration) / slowest file=5 minutes. Now this time is only 1/3rd.

Tagged: Rails, Ruby

Prevent ActionMailer from sending to deleted users / blacklisted addresses

pragmatig — Thu, 22 Dec 2011 10:11:11 +0000

No need to check in normal code, just do everything as usual and this interceptor will prevent you from spamming people who do not want any emails.
Its not perfect(missing bc/bcc filters but if should be fine for 90% of cases)

#config/initializers/blacklisted_emails.rb
class MailInterceptor
  def self.delivering_email(message)
    if User.where(:email => message.to, :receive_emails => false).any?
      message.perform_deliveries = false
    end
  end
end

Mail.register_interceptor(MailInterceptor)

Tagged: Mail, Rails, Ruby

You dont need RSpec in :development

pragmatig — Sun, 11 Dec 2011 17:52:07 +0000

You can speed up development load time and get rid of rspec in development if you simply not require it in :development and just load the tasks in the Rakefile where they are needed.

# Gemfile
group :development, :test do
  gem 'rspec-rails', :require => false
end

# Rakefile
require File.expand_path('../config/application', __FILE__)
require 'rspec-rails' if ['test', 'development'].include?(Rails.env)
...

Repeat for any other testing lib for even more speedup

Tagged: Rails, Ruby

Running tests via spork directly from Rubymine

pragmatig — Tue, 06 Dec 2011 03:48:59 +0000

Very fast test execution from inside Rubymine.
Cmd+F8 + 2 seconds == test results

1 Activate DRB in Rubymine
Run > Edit configurations > Defaults > RSpec > Use DRB Server

2 a) Start spork from Rubymine
Tools > Run Spork DRB Server

2 b) (alternatively) start spork from the commandline
Code

  # spec/spec_helper.rb
Spork.prefork do
  if ENV["RUBYMINE_HOME"]
    puts "Rubymine support"
    $:.unshift(File.expand_path("rb/testing/patch/common", ENV["RUBYMINE_HOME"]))
    $:.unshift(File.expand_path("rb/testing/patch/bdd", ENV["RUBYMINE_HOME"]))
  end
end

and run it via:

RUBYMINE_HOME=/Applications/Rubymine\ 3.2.4.app/ spork

Tagged: Rails, Ruby

Capybara: use current_path_info instead of current_path / current_url

pragmatig — Sat, 26 Nov 2011 03:41:22 +0000

Capybara has current_url, which returns an url that is unmatcheable since it includes a randomized port, and current_path with contains neither query nor fragment(aka hash/anchor) and is therefore rather useless.

Behold the perfect current_path_info, which returns the full path and query + fragment.

Code

def current_path_info
  current_url.sub(%r{.*?://},'')[%r{[/\?\#].*}] || '/'
end

Tagged: Capybara

Adding travis hook to new github project via the commandline

pragmatig — Sun, 20 Nov 2011 01:12:22 +0000

I got tired of clicking through the github menus, so after some toying around with the octopi github client (which does not work as expected…), I wrote this small script using pure rest-client.

Creates a new travis hook based on the travis info in your .gitconfig
and also triggers the initial test-run.

add to ~/.gitconfig

[travis]
  user = xxx
  token = yyy

download & run the Script
wget https://raw.github.com/grosser/dotfiles/master/bin/github-add-travis

./github-add-travis github-password project-name

Tagged: Ruby

Switching form Public Domain to MIT

pragmatig — Thu, 27 Oct 2011 23:00:21 +0000

All my new projects will be released under MIT / those I work on will be switched, which will still means the same as before: Do wtf you want with this code, no need for any naming/license copying.

After reading some articles I realized that public domain does not always work since some countries do not allow it and its also unclear what happens when the code causes problems <-> lawsuit.

Ill also try to add a s.license = ‘MIT’ to all gemspecs, to make license management easier.

Tagged: Ruby