Jank REPL

jank_repl

#!/bin/bash

INPUT_FILE=input
OUTPUT_FILE=output
LAST_RUN=$(date "+%s")
LAST_MODIFIED=$LAST_RUN

touch $INPUT_FILE
touch $OUTPUT_FILE

chmod u+x $INPUT_FILE
chmod a+rwx $INPUT_FILE $OUTPUT_FILE

case "$OSTYPE" in
  darwin*)  STAT_ARGS="-f %c" ;;
  linux*)   STAT_ARGS="-c %Y" ;;
  *)        echo "unknown OS: $OSTYPE" && exit ;;
esac

while [[ true ]]; do
  LAST_MODIFIED=$(stat $STAT_ARGS $INPUT_FILE)

  if [[ $LAST_MODIFIED -gt $LAST_RUN ]]; then
    echo "Running new command"
    ./$INPUT_FILE 2>&1 >> $OUTPUT_FILE
    LAST_RUN=$LAST_MODIFIED
  fi
  sleep 1
done