David M. Johnson dmjio

Nix builder for Kubernetes

Table of Contents

Nix builder for Kubernetes
- Overview
- Why?
How?

I think Gabriel's blogpost http://www.haskellforall.com/2018/08/nixos-in-production.html he explains how to work around nixos-rebuild's inflexibilities. However, I think everything that is being suggested is actually possible in nixos-rebuild already

They blog is still a good exercise to understanding what nixos-rebuild does behind the scenes though.

Deploy to a target machine, from a build machine, with pinned nixpkgs, and a specific nixos config:

nixos-rebuild switch \
 [email protected] \

Swift Meets C/C++

This gist is a simple example on how to call a function written in swift from C/C++, without taking the detour via Objective-C/C++.

In this example we're going to invoke a function called say_hello, which, as the name already suggests, prints "Hello, World!" to the terminal.

keybase pgp pull <keybase.io user>
gpg --edit-key <keybase.io user>
  > lsign
  > save
git-crypt add-gpg-user <keybase.io user>

I started writing this polemic to answer your question, but I ended up touching on most of my gripes with Haskell in general, not just in a corporate context.

GHC

GHC is a modern compiler with an amazing RTS and tons of features, but I have some issues with it.

Monolithic and Hard to Contribute To

title	subtitle	author
The Fools Who Dream	(Computer Science Edition)	Justin Hurwitz (Lyrics Justin Le)

[Charles Babbage]

His difference engine / did multiplication
And sometimes addition by three

Commit Message Guidelines

Short (72 chars or less) summary

More detailed explanatory text. Wrap it to 72 characters. The blank
line separating the summary from the body is critical (unless you omit
the body entirely).

Write your commit message in the imperative: "Fix bug" and not "Fixed
bug" or "Fixes bug." This convention matches up with commit messages

	// ### [ Lexical part ] ########################################################

	_ascii_letter_upper
	: 'A' - 'Z'
	;

	_ascii_letter_lower
	: 'a' - 'z'
	;

	{-# LANGUAGE FlexibleContexts #-}
	{-# LANGUAGE FlexibleInstances #-}
	{-# LANGUAGE DataKinds #-}
	{-# LANGUAGE EmptyCase #-}
	{-# LANGUAGE GADTs #-}
	{-# LANGUAGE KindSignatures #-}
	{-# LANGUAGE MultiParamTypeClasses #-}
	{-# LANGUAGE PolyKinds #-}
	{-# LANGUAGE RankNTypes #-}
	{-# LANGUAGE ScopedTypeVariables #-}

	with builtins;

	rec {
	pkgs = import <nixpkgs> {};

	testGHC = pkgs.haskellPackages.ghcWithPackages (p: with p; [
	base base-orphans bifunctors comonad contravariant distributive
	tagged transformers
	]);