flac tags with metaflac

flactags.sh

#!/bin/bash
# file format: ARTIST/ALBUM/01-TITLE.flac
read -p "YEAR? " -n 4 YEAR
ALBUM="${PWD##*/}"              # ALBUM=$(basename "${PWD}")
ARTIST=$(echo $(cd .. && echo "${PWD##*/}"))

# delete all
metaflac --preserve-modtime --remove-all-tags *.flac
# artist, album, year and cover
metaflac --preserve-modtime --set-tag=ARTIST="${ARTIST}" --set-tag=ALBUM="${ALBUM}" --set-tag=DATE=${YEAR} --import-picture-from=Folder.jpg *.flac

# using input redirection and process substitution (!) to manage punctuation and spaces
# TRACKNUMBER
while read file;
do
    # only keep tracknumber before `-'
    metaflac --preserve-modtime --set-tag=TRACKNUMBER=${file%%-*} "${file}";
done < <(ls *.flac)
# TITLE
while read file;
do
    TITLE="${file#*-}";         # remove tracknumber
    TITLE="${TITLE%.flac}";     # remove extension
    metaflac --preserve-modtime --set-tag=TITLE="${TITLE}" "${file}";
done < <(ls *.flac)