update album directory mtime to match oldest file in the directory

update-dir-mtime

#!/usr/bin/env bash

cd /goliath/entertainment/Music/DavesMusic/ || exit 1

# loop each album
for f in */*/; do
	echo "album: $f"

	# get the mtime of every song and keep the oldest
	oldest=$(stat --format '%Y %n' "$f"* | sort -n | head -1)

	if [[ -z $oldest ]]; then
		echo "failed to find timestamp" >&2
		continue
	fi

	# we don't keep the timestamp - we just keep the name of the file with
	# the oldest timestamp to use as a reference to the touch command
	read -r ts ref <<< "$oldest"

	echo "mtime -> $ts (ref file: $ref)"
	# touch -r "$ref" "$f"
	echo
done