Jordan Sissel jordansissel

With a docker volume

% sudo rm -r /tmp/overlay/upper; mkdir /tmp/overlay/upper
% docker volume create --driver local --opt type=overlay --opt o=lowerdir=/etc,upperdir=/tmp/overlay/upper,workdir=/tmp/overlay/work --opt device=overlay overlay-etc

# I've tried without --privileged, and with --security-opt label=disable, both still relabel all files.
% sudo docker run --volume overlay-etc:/etc2 --privileged ubuntu:latest date

Possibly the worst way to encode json in C?

% emcc example.c -o example.js -s DEFAULT_LIBRARY_FUNCS_TO_INCLUDE='$UTF8ToString,$stringToNewUTF8

% node example.js
JSON: {"name":"Captain Pants","id":0}

What?

Sometimes tar files have tar files, and it might be nice to read the contents of some files several layers deep. Here's how we can do it with Ruby and Python3 with no external dependencies.

Podman save

We can create a layered tar file (a tar file containing other tar files) using docker save or podman save

% podman save fpm-ubuntu-18.04 -o test.tar

% git clone --depth 1 https://github.com/home-assistant/core

Find "climate" support, then look for components with iot_class matching "local"

% grep -l climate */const.py | awk -F/ '{print $1}' | xargs -n1 sh -c 'jq .iot_class $1/manifest.json | grep -q local && echo "* https://www.home-assistant.io/integrations/$1"' -

	# A rough demo demo following the instructions
	# on https://docs.github.com/en/actions/tutorials/create-actions/create-a-javascript-action
	#

	define rollup_content =
	import commonjs from "@rollup/plugin-commonjs";
	import { nodeResolve } from "@rollup/plugin-node-resolve";

	const config = {
	input: "index.js",

	# 'gem list -i foo' will print 'true' if a gem is already installed. 'false' otherwise

	GEMS=clamp rake

	# From the GEMS list, generate a list of make targets
	TARGETS=$(foreach gem,$(GEMS),gem-$(shell gem list -i $(gem))-$(gem))
	build: $(TARGETS)
	build:
	@echo "=> OK to build"

	const { DeviceDiscovery } = require('sonos');

	DeviceDiscovery((device) => {
	//console.log('found device at ' + device.host + " - " + device.friendlyName)

	device.deviceDescription().then(descr => {
	// look for a sonos named "Sonos Roam"
	if (descr.friendlyName.match(/Sonos Roam/)) {
	console.log(descr);
	// Coheed - Vaxis II - first track

	[Unit]
	Description=no description given

	[Service]
	Type=simple
	User=root
	Group=root
	# Load env vars from /etc/default/ and /etc/sysconfig/ if they exist.
	# Prefixing the path with '-' makes it try to load, but if the file doesn't
	# exist, it continues onward.

	#include <X11/Xlib.h>
	#include <stdio.h>
	#include <stdlib.h>

	int main() {
	Display *dpy;

	// Below here, Copilot generated the rest.
	dpy = XOpenDisplay(NULL);
	if (dpy == NULL) {