JuPlutonic

## Environment normalisation

# Ignore bundler config.
/.bundle
/vendor/bundle
/lib/bundler/man/

# Unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
.rvmrc

JuPlutonic

#!/bin/bash


PATH=$(rbenv root)/bin:$(rbenv root)/plugins/ruby-build/bin:$PATH

version=${1:-2.2.7}

trap 'exit 1' 2

eval "$(rbenv init -)"

JuPlutonic

require 'thread'

# ##################################
# Ruby anti-race conditions workshop
# ##################################
class Sheep
  def initialize
    @shorn = false
   end

JuPlutonic

require 'thread'

# ##################################
# Ruby anti-race conditions workshop
# ##################################
# Eliminating interleavings at lines 22-25 with '''Mutex'''
# But you shouldn't write code like this in a multi-threaded environment:
# Whenever you have multiple threads sharing a reference to an object, 
# and making modifications to it, you're going to run into trouble 
# unless you have some kind of locking in place to prevent a context switch 

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# Lazy initialization is another form of 
# the check-then-set race condition.
# The ||= operator effectively expands to

@logger ||= Logger.new

# expands to 

if @logger == nil
  @logger = Logger.new

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#!/usr/bin/ruby2.4
#
# This file was generated by RubyGems.
#
# The application 'rubygems-update' is installed as part of a gem, and
# this file is here to facilitate running it.
#

require 'rubygems'

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### Nginx ###
check process nginx with pidfile /opt/nginx/logs/nginx.pid
  start program = "/etc/init.d/nginx start"
  stop program = "/etc/init.d/nginx stop"
  if cpu > 60% for 2 cycles then alert
  if cpu > 80% for 5 cycles then restart
  if memory usage > 80% for 5 cycles then restart
  if failed host 127.0.0.1 port 80 protocol http
    then restart
  if 3 restarts within 5 cycles then timeout

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GnuPG Packaging

A few items here assume zsh as shell (globs and expansion modifiers, print -l).

Required installation order:

Previously recorded:
gmp nettle gnutls npth libgpg-error libgcrypt libksba libassuan  ( pinentry , gnupg )

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Homebrew build logs for libtorrent-rasterbar on Ubuntu 18.10
Build date: 2019-01-05 07:57:51
=========================================================================================================
Before and after migration on /home/linuxbrew/.linuxbrew/Homebrew $HOMEBREW_REPOSITORY,
before and after I sourced zsh without export$PATH="BLAH-BLAH-BLAH/.pyenv/shims:$PATH" (terminal restarted, zcomdump removed).
libtorrent-rasterbar formula can't be compiled at all (no binary bottle presented)

JuPlutonic

Fetching https://github.com/rails/spring.git
The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
Fetching gem metadata from https://rubygems.org/..........
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Resolving dependencies...
Using rake 12.0.0
Using concurrent-ruby 1.0.5
Using i18n 0.8.6
Using minitest 5.10.3