jordansissel

Grep Ruby's NEWS/NEWS.md file for text and show me what version it's mentioned in:

% git tag | grep '^v[123]_[0-9]_0$' | xargs -n1 sh -c 'printf "$1:NEWS.md\n$1:NEWS\n" | git cat-file --batch | grep -i "Array.filter" | sed -e "s@^@$1: @"' -
v2_6_0:     * Array#filter is a new alias for Array#select. [Feature #13784]
v2_6_0:     * Array#filter! is a new alias for Array#select!. [Feature #13784]

Run a command with the same environment values as another process:

jordansissel

# 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",

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

jordansissel

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}

jordansissel

# '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"

jordansissel

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

jordansissel

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

jordansissel

--version 1.2.3.4

jordansissel

[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.

jordansissel

#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) {