for advent of code, run on save of .py or .txt data. Used as: tmux new -s aoc -n log aocwatch \; splitw -h

aocwatch.sh

#!/bin/bash

echo Starting watch in $(pwd)
fswatch --event=Updated . | while read -r event; do
  if [[ "$event" == *.py ]]; then
    echo Setting script to ${event}. Data is ${data:-not set}
    script=$event
  elif [[ "$event" == *.txt ]]; then 
    echo Setting data to ${event}. Script is ${script:-not set}
    data=$event;
  else
    echo "Skipping $event"
    continue;
  fi
  if [[ -n $child ]]; then
    echo Killing $child
    kill -9 $child || echo no child running
  fi
  set -x
  python3 ${script:-${data/%.txt/.py}} ${data:-${script/%.py/.txt}} & child=$!
  set +x
done