wteuber

#!/usr/bin/env bash

# Convert all mp4 videos in the current directory to animated GIF files.
# https://github.com/ImageOptim/gifski?tab=readme-ov-file#from-ffmpeg-video

for f in *.mp4; do
  ffmpeg -i "$f" -f yuv4mpegpipe - | gifski --fps 15 --width 480 -o "${f%.mp4}.gif" -
done

wteuber

#! /usr/bin/env bash
# brew install imagemagick
# brew install jpegoptim

mkdir 2048
for image in *.jpg; do
  convert $image -resize 2048x2048\> ./2048/$image
  jpegoptim --strip-all -q --max=80 ./2048/$image
done

wteuber

#!/usr/bin/env sh

# Rename all file in the current directory according to their file creation date
# For jpegs the file date will be set according to its EXIF data
# e.g. 
#     "20130628_014218.txt" not renamed
#     "test.TXT" => "20130628_002938.txt"
# file extensions will be lower case

jhead -ft -dt -autorot -exonly -n%Y%m%d_%H%M%S *.[Jj][Pp][Gg]

wteuber

# From https://superuser.com/questions/314239/how-to-join-merge-many-mp3-files
ffmpeg -f concat -safe 0 -i <(for f in ./*.mp3; do echo "file '$PWD/$f'"; done) -c copy "all_tracks.mp3"

wteuber

#!/usr/bin/env zsh

# Usage: copy_dates.sh source_file dest_file
# Requires: Xcode Command Line Tools (for SetFile)

set -euo pipefail

if (( $# != 2 )); then
  echo "Usage: $0 source_file dest_file" >&2
  exit 1

wteuber

# gem install icalendar
require 'icalendar'

# Open a file or pass a string to the parser
cal_file = File.open("/path/to/my_large_calendar.ics")

# Parser returns an array of calendars because a single file
# can have multiple calendars.
cals = Icalendar::Calendar.parse(cal_file)
cal = cals.first

wteuber

#!/usr/bin/env ruby
# frozen_string_literal: true

# Example usage:
#  ./check_namespaces.rb
#  for dir in */; do (cd "$dir" && ../check_namespaces.rb); done
#  ./check_namespaces.rb path/to/test/
#  ls -d *components/**/test/* | xargs ./check_namespaces.rb

require "prism"

wteuber

# https://gist.github.com/wteuber/c435bafcd79beb91b65e354fc907efe8
# macOS/zsh

# Apply Ruby's keyword argument and hash value omission in a git repo

# First occurence only
git grep -lP '\b([A-Za-z0-9_]+): \1\b[,\)]' -- '*.rb' | head -1 | xargs -I {} sed -i -E 's/\b([A-Za-z0-9_]+): \1\b([,\)])/\1:\2/g' "{}"

# Apply for "<var>: <var>," and "<var>: <var>)"
git grep -lP '\b([A-Za-z0-9_]+): \1\b[,\)]' -- '*.rb' | xargs -I {} sed -i -E 's/\b([A-Za-z0-9_]+): \1\b([,\)])/\1:\2/g' "{}"

wteuber

#!/bin/bash

# Usage: ./generate_random_bitmaps.sh <width> <height> <color> <entropy>
# Example ./generate_random_bitmaps.sh 100 100 red 0.8

# Default dimensions
WIDTH=${1:-100}
HEIGHT=${2:-100}
PIXELS=$((WIDTH * HEIGHT))

wteuber

git ls-files | xargs wc -w 2> /dev/null | ruby -e "puts ARGF.map{_1.scan(/^\s*(\d+)/)[0][0].to_i}.inject(&:+)"