mkohler

#!/bin/sh

# Get the current version, and then use tr to remove double-quotes.
version=$(nix-instantiate --eval --attr 'lib.version' '<nixpkgs>' | tr -d '"')

# The version is in the form YY.MM.NUM.HASH. We just want the 4th field.
commit_hash=$(echo ${version} | cut -d '.' -f4)

echo "https://github.com/NixOS/nixpkgs/archive/${commit_hash}.tar.gz"

mkohler

Installing on Linode

I copied the bulk of this guide from Andrew Miller's NixOS-On-Linode.md instructions. It's a very well-written guide, but I felt we could make things a bit more simple than he left them in his original guide.

This tutorial is written for people who want to run NixOS on a Linode instance. The installation is pretty straightforward, but it involves some bootstrapping using Linode's tools.

In this tutorial, we will show you how to set up NixOS on Linode by setting up disks (including the installation live CD) using the rescue OS, and use the minimal live CD to install NixOS onto your disk.

Create a Linode

mkohler

Standard project structure

This is a project structure I’ve found useful. Looking for any thoughts/comments/feedback. Roughly, I found a tension between the style nixpkgs expects and the style conducive to development, so I extracted the common portion into a derivation.nix which is used by the remaining .nix files. This setup allows me to use nix build, nix-shell, overlays, Hydra, alternate packaging schemes, cross-compiling, etc.

mkohler

Haskeller Competency Matrix

See also List of materials about Software Design in Haskell

	Junior	Middle	Senior	Architect
Haskell level	Basic Haskell	Intermediate Haskell	Advanced Haskell	Language-agnostic
Haskell knowledge scope	Learn you a Haskell	Get programming with Haskell	Haskell in Depth	Knows several languages from different categories
	Get programming with Haskell	Haskell in Depth	Functional Design and Architecture
			[Other books on Software Architecture in Haskell](https://github.com/graninas/software-design-in-haskell#Books-on-S

mkohler

# Hello, and welcome to makefile basics.
#
# You will learn why `make` is so great, and why, despite its "weird" syntax,
# it is actually a highly expressive, efficient, and powerful way to build
# programs.
#
# Once you're done here, go to
# http://www.gnu.org/software/make/manual/make.html
# to learn SOOOO much more.

mkohler

# This is how you add a Jenkins slave

# On master:

  sudo -u jenkins -H ssh-keygen

# On slave

  adduser --system --group --home=/var/lib/jenkins-slave --no-create-home --disabled-password --quiet --shell /bin/bash jenkins-slave
  install -d -o jenkins-slave -g jenkins-slave /var/lib/jenkins-slave

mkohler

#!/bin/sh
cp postmkvirtualenv ~/.virtualenvs

mkohler

#!/bin/bash
#
# DESCRIPTION:
#
#   Set the bash prompt according to:
#    * the active virtualenv
#    * the branch/status of the current git repository
#
# USAGE:
#