Leandro Lisboa Penz lpenz

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Programming language enthusiast with Rust and Haskell adventures - and 20+ years of professional embedded C programming with a lot of python.

lpenz / winclick

Created November 17, 2016 13:55

Click a window selected by name; uses xwininfo and xdotool

	#!/bin/bash

	WINNAME="${1?usage: "$0" windowname}"

	set -e

	TMP=$(mktemp)
	trap 'rm -f $TMP' EXIT

	eval "$(xdotool getmouselocation --shell)"

lpenz / ansible-apt-repos

Last active November 4, 2021 02:47

Install apt repositories with ansible

	#!/bin/bash

	set -x -e -o pipefail

	: for deb-multimedia keyring, browse http://www.deb-multimedia.org/pool/main/d/deb-multimedia-keyring/deb-multimedia-keyring
	ansible -i localhost, -c local localhost -m apt_repository -a 'repo="deb http://www.deb-multimedia.org stable main non-free"'
	ansible -i localhost, -c local localhost -m apt_repository -a 'repo="deb http://www.deb-multimedia.org testing main non-free"'
	ansible -i localhost, -c local localhost -m apt_repository -a 'repo="deb http://www.deb-multimedia.org unstable main non-free"'

	: for dropbox

lpenz / pa-monofy-stereo

Last active March 26, 2017 18:54

Join audio sink channels into a single mono channel, for stereo audio files with sound in only a channel

	#!/bin/bash

	set -e -x

	pacmd load-module module-remap-sink sink_name=mono master=$(pacmd list-sinks \| grep -m 1 -oP 'name:\s<\K.*(?=>)') channels=2 channel_map=mono,mono

lpenz / nix-enter

Last active March 26, 2017 18:53

Enter a shell with ~/nix privately mounted in /nix, using mount namespaces. sudo required

lpenz / minesweeper.hs

Created November 20, 2017 23:00

minesweeper kata in haskell, no output


	import qualified Data.Map as Map
	import Control.Monad


	main :: IO ()
	main = processOneField


	processOneField :: IO ()

lpenz / Dockerfile

Created October 27, 2018 20:28

Dockerfile that creates a container that installs fluorite + electron locally

	# You can use this Dockerfile to avoid having to install npm to
	# get fluorine + electron installed locally.
	# You still need node.js to run it, however.
	# To use:
	# docker build -t fluorine .
	# docker run -it --rm -v $PWD:/home/user/work -e MY_UID=$UID fluorine
	# The container will exit after fluorine + electron are set up; you can then
	# remove the container with:
	# docker rmi fluorine
	# To run fluorine:

lpenz / SConstruct

Created January 20, 2019 21:54

SConstruct template with an action that renders jinja2 templates using data from an yaml file, while providing a markdown filter

	# SConstruct template with an action that renders jinja2 templates
	# using data from an yaml file, while providing a markdown filter.

	import yaml
	import jinja2
	import markdown

	if False:
	Environment = None

lpenz / steam-session.sh

Last active January 24, 2019 21:57

Start steam in a nested X server running icewm

	#!/bin/bash

	set -e -x

	DISPLAY_SESSION=:1

	Xephyr "$DISPLAY_SESSION" -screen 1800x1000 &
	PID_X=$!
	trap 'kill "$PID_X"; wait "$PID_X"' EXIT
	sleep 1

lpenz / Vagrantfile-minikube

Created March 25, 2019 16:00

Vagrantfile that installs minkube in a VM and runs it there with vm-driver=none

	# -- mode: ruby --
	# vi: set ft=ruby :

	# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
	VAGRANTFILE_API_VERSION = "2"

	Vagrant.configure(VAGRANTFILE_API_VERSION) do \|config\|
	config.vm.box = "debian/stretch64"
	# config.vm.box = "debian/buster64"
	config.vm.provider "libvirt" do \|v\|

lpenz / chroot-with-mounts

Created January 26, 2020 16:14

chroot script that mounts /dev, /proc, etc. in a private mount namespace