sepastian

# The Rails Guide on Caching suggests to use ActionController#expire_fragment
# in a controller to expire a cached fragment
# (http://guides.rubyonrails.org/caching_with_rails.html#fragment-caching)
#
# Unfortunately, hooking into controllers is not easily possible in Rails Admin,
# why another strategy for expiring cached fragments must be used.
#
# The Rails Guide also describes how to use custom keys for caching.
# To implement caching in Rails Admin, maintain a custom key for each fragment
# in the cache. Whenever the model changes, use a callback to update the key.

sepastian

# Convert m4a (iTunes store) to flac using avconv.

ls *m4a | while read f; do avconv -i "$f" "${f/m4a/flac}"; done

sepastian

class Hash
  def deep_traverse(&block)
    stack = self.map{ |k,v| [ [k], v ] }
    while not stack.empty?
      key, value = stack.pop
      yield(key, value)
      if value.is_a? Hash
        value.each{ |k,v| stack.push [ key.dup << k, v ] }
      end
    end

sepastian

# Reset the password of any user in Mac OS X 10.4.
# Boot into single user mode pressing and holding Ctrl + S after pressing the power button.
# When the root prompt appeats, do:

sh /etc/rc
passwd admin
reboot

sepastian

# Install Locomotive CMS's wagon and engine
# Ruby version used: ruby-2.1.1 [ i686 ] RVM
# Depends: mongo, imagemagick

# Wagon
# See http://doc.locomotivecms.com/get-started/install-wagon#linux

gem install locomotivecms_wagon

# Engine

sepastian

# https://no0p.github.io/postgresql/2014/03/29/upgrading-pg-ubuntu.html

sepastian

# Use lsleases (https://github.com/j-keck/lsleases) to detect the Raspberries IP address.
# Other suggested using ping and arp, both of which rely on the hostname of the Raspberry to display as 'raspberry';
# depending on the network, the hostname may change;
# lsleases will still work.

$ sudo lsleases -s
2015/01/15 15:36:40 startup -  version:  1.4.0
2015/01/15 15:36:40 enable active check - ping every: 15m
#
# Reboot the Raspberry and wait

sepastian

# Use with `rails new -m https://gist.githubusercontent.com/sepastian/8d9bf523d3950d4c8a4d/raw/88fd29455af48f5d99569063a6239b5dcdac3d96/rails_4.2_default.rb -d postgresql`

require 'fileutils'

if Rails.version !~ /\A4\.2/
  puts "Required: Rails 4.2.x; found: Rails #{Rails.version}."
  puts "$ bundle update rails"
  exit 2
end

sepastian

# Run a Ruby script every minute.
# Use the Ruby provided by rbenv.
# 
# Edit with crontab -e.
*/1 * * * * /bin/bash -c 'export PATH=$HOME/.rbenv/shims:$HOME/.rbenv/bin:"$PATH"; eval "$(rbenv init -)"; cd $HOME/path/to/script/; ruby ./graph.rb > /output/path/index.html'

sepastian

### Keybase proof

I hereby claim:

  * I am sepastian on github.
  * I am sepastian (https://keybase.io/sepastian) on keybase.
  * I have a public key whose fingerprint is 214D 35E9 65E8 6DDF AFE4  F388 03AB E849 A825 7946

To claim this, I am signing this object: