Jim Meyer purp

Being a collection of digital scribbles on my adventures with Adafruit and Mac OS, with many diversions into the nature of serial ports, &c., which may be useful to the less patient practitioner

Because gist file order is ASCIIbetical:

notes on individual Feathers are in files with no prefix
notes on FeatherWings and other boards are prefixed with ~ to push them below the Feather notes
general notes are prefixed with ! to keep them near the top

I have a bunch of folks I want to export from Apple Contacts on MacOS and turn into a spreadsheet for a holiday card mail merge.

This is my clumsy way of doing it.

Minimum latency for fiber and Cat 5 copper

This is a calculation of the minimum possible latency you could possibly expect between two points, if the theoretical connection between them was completely straight and of perfect quality. This is not attainable in a modern switched network, but it's useful both to understand the amount of delay injected by network implementation and complexity, and to compare relative latencies between routes.

Distances and optimum latency between cities

Nuremberg/Prague

156.098 mi
0.8379643083349 light-milliseconds
1.309319231773281 cat5-milliseconds

Install and Run Rocket.Chat on OpenSUSE Leap 42.2

Last updated 2017-08-26

These are barebones instructions for how to set up a Rocket.Chat server on OpenSUSE Leap 42.2 using nginx as a reverse proxy. These will help you set up a system you can experiment with. THEY ARE NOT INTENDED FOR SETUP OF A PRODUCTION SYSTEM! They are oriented on using a VM from AWS, but should work for any Leap 42.2 system.

Overview

You will install and configure:

Debugging Travis CI locally using Docker

This assumes you've got docker-machine installed, running, and can do docker run

1. Get a debug instance running

    docker run --name travis-debug -dit quay.io/travisci/travis-ruby /sbin/init
    docker exec -it travis-debug bash -l

Huge thanks to @bounga for his post that didn't assume you've got a working /etc/nginx.conf. Everyone else's posts just assume that you've got the same /etc/nginx.conf as they do, and when you don't, you're screwed.

I like the sites-available/sites-enabled paradigm so I did this:

mkdir /etc/nginx/sites-available /etc/nginx/sites-enabled
ln -s /etc/nginx/sites-enabled /etc/nginx/vhosts.d

I highly recommend using capistrano-puma. Super basic steps condensed from the capistrano-puma readme:

Add this to your Gemfile in the development group:

Installing nokogiri manually on OpenSUSE Leap 42.1:

gem install nokogiri -- --use-system-libraries \
    --with-xml2-dir=/usr \
    --with-xslt-dir=/usr \
    --with-exslt-dir=/usr

I can't say I understand why I had to specify those dirs as that's the system default, but it works and I'm in a hurry. I'll update this as I learn more someday.

Meanwhile, you may be interested in the Nokogiri issue that this stems from

How To Run This Piece Of Junk

clone aws/aws-cli and homebrew-core into ~/work
Run check_awscli_tracking.sh
Run awscli_release_stats.rb

	# Load DSL and set up stages
	require "capistrano/setup"

	# Include default deployment tasks
	require "capistrano/deploy"

	# Load the SCM plugin appropriate to your project:
	#
	# require "capistrano/scm/hg"
	# install_plugin Capistrano::SCM::Hg

	# RSpec matcher to spec delegations.
	#
	# Usage:
	#
	# describe Post do
	# it { should delegate(:name).to(:author).with_prefix } # post.author_name
	# it { should delegate(:day).to(:created_at) }
	# it { should delegate(:month, :year).to(:created_at) }
	# end
	#