shaiguitar

# mount volume PWD on host to /app in container.
shai@lappy ~/tmp/example-working-docker-compose-environment-vars [master *] ± % cat docker-compose.yml
version: "3"
services:
  some_server:
...
    volumes:
      - $PWD:/app

shaiguitar

usage()
{
  echo "./$0 [--verbose]"
}

VERBOSE=0
if [ "$1" == "--verbose" ]; then
  VERBOSE=1
fi 

shaiguitar

======================
I VI II V progression
======================

Assuming you can 

1) Substitute the minor IV for a dominant IV and the minor II for a dominant II
2) Substitue any of the VI/II's (because of #1) or V for a tritone equivalent

So...Some notation/glossary for the below:

shaiguitar

#!/bin/sh

### BEGIN INIT INFO
# Provides:          odrive
# Required-Start:    $local_fs $network $syslog
# Required-Stop:     $local_fs $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: odrive init script
# Description:       odrive server startup sctipt.

shaiguitar

class MyCache

  def self.all(resource_klass, connection, meth, args = nil)
    cachemsg = "resource #{resource_klass} connection #{connection.class} for #{Fog::Cache.namespace_prefix}: M:#{meth} A:#{args}"

    if MyCache.renew?
      info("Renewing cache now. Cache is non existant or older than #{EXPIRE_TIME} seconds.")
      Fog::Cache.expire_cache!(resource_klass, connection)
    end

shaiguitar

1. Record cache set/fetch time.

Fog::Cache.write_metadata({:last_refreshed => Time.now})

2. Create some custom expirey method

      EXPIRE_TIME = (60 * 60 * 24) # day old cache.
 

shaiguitar

require 'fog'
require 'fog/aws'

ec2 = Fog::Compute.new :provider => 'AWS', :region => 'us-east-1'
Fog::Cache.namespace_prefix = "benchmark-test"

begin
  servers = Fog::Cache.load(Fog::Compute::AWS::Server, ec2)

  puts "found cache."

shaiguitar

class Tail
  class << self
    def tail(path, n)
      file = File.open(path, "r")
      buffer_s = 512
      line_count = 0
      file.seek(0, IO::SEEK_END)

      offset = file.pos # we start at the end

shaiguitar

# USAGE:
# reason for this is because sometimes you want to know when the originating code/comment/whatever was brought into the repo
# but you end up following a trace of lots of commits that just moved around the original chunk of code.
# this uses git bisect to trace back to the original commit that has this text in the repo.
# depends on ack, but you could easily change this to use `grep -r`
#
# $ git-find-original "some search string that you want to find the original commit that had this exact text"

match_arg="$@"

shaiguitar

class StringHelper
  def char_codes_for(str)
    new_str  = ""
    str.each_char { |c| new_str << "&##{c.ord};" }
    new_str
  end
end