gibatronic

#!/usr/bin/env bash
#
# Slide an image to the left using ffmpeg
# 
# Usage:
#   ./slide photo_input.jpg video_output.mp4
#
# See:
#  https://ffmpeg.org/ffmpeg-filters.html#overlay-1
#  https://easings.net/

gibatronic

#!/usr/bin/env node

class CancelError extends Error {
    constructor(message) {
        super(message)
        this.name = 'CancelError'
    }
}

function random(minimum, maximum) {

gibatronic

#!/usr/bin/env bash
#
# Scale up or down the duration of the given video
# The final video will be in the mp4 format
#
# Usage:
#   scale-duration <video-path> <desired-duration>
#
# Options:
#   video-path        The video to scale

gibatronic

#!/usr/bin/env bash
#
# Make your server get traffic from port 80 without having to run it with sudo privilege.
# Based on: Running Jenkins on Port 80 or 443 using iptables
# https://wiki.jenkins.io/display/JENKINS/Running+Jenkins+on+Port+80+or+443+using+iptables

# allow traffic on ports 80 and 8080
sudo iptables -I INPUT 1 -p tcp --dport 80 -j ACCEPT
sudo iptables -I INPUT 1 -p tcp --dport 8080 -j ACCEPT

gibatronic

Proper job control in Bash scripts

Simple example of how to properly launch background jobs and then gracefully terminate them.

Gotchas

1. We could trap only the EXIT signal, but then after killing workers we get an unwanted "Terminated" message.
2. In worker scripts, we must call exit when cleaning, to break out of the infinite loop
3. After killing a worker, we still have to wait for them to gracefully terminate.

gibatronic

#!/usr/bin/env bash
#
# Reset Quick Look and all of its cache
#
# Usage:
# ./delete-quicklook-cache

main() {
  qlmanage -r cache > /dev/null
  local exit_code=$?

gibatronic

#!/usr/bin/env bash
#
# Convert any webm video file inside the Downloads folder to mp4
#
# Usage:
#   ./webm2mp4

main() {
  local videos=$(find ~/Downloads -name '*.webm')

gibatronic

#!/usr/bin/env bash

main() {
  local commit_message_file=$1

  local branch_name=$(__git_ps1 '%s' | cut -d '|' -f 1)
  local commit_message=$(cat "$commit_message_file")

  # do nothing if the commit_message already begins with the branch_name
  if [[ "$commit_message" == "$branch_name"* ]]; then

gibatronic

complete_npx

Bash tab completion for the npx command

Usage

Save complete_npx in your home folder and then source it on your .bash_profile with:

. ~/complete_npx.sh

gibatronic

const crypto = require('crypto');

let hash;
let index = 0;

function check() {
  const data = hash.read().toString('hex');

  hash.removeListener('readable', check);