helm/bin/mpd/cleanup

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#!/usr/bin/env bash
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# I frequently discover that there are crappy songs hidden in my music library.
# I ain't havin' none o' that! So I file them away in my 1-star.m3u playlist.
# This script reads that playlist, delete those songs, and cleans up any empty
# folders it leaves behind. It will also remove duplicates from all playlists.
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#
# Usage: cleanup-music
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set -e
shopt -s nullglob
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music_dir=$(awk '/music_directory/ { print gensub(/"/, "", "g", $2); }' "$HOME/.config/mpd/mpd.conf")
music_dir="${music_dir/#\~/$HOME}"
playlist_dir=$(awk '/playlist_directory/ { print gensub(/"/, "", "g", $2); }' "$HOME/.config/mpd/mpd.conf")
playlist_dir="${playlist_dir/#\~/$HOME}"
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playlist_file="${playlist_dir}/1-star.m3u"
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# Delete designated songs
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IFS=$'\n'
declare -a to_delete=()
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while read -r song; do
songpath="${music_dir}/${song}"
[[ -f $songpath ]] && to_delete+=("$songpath")
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done < "$playlist_file"
if (( ${#to_delete[@]} == 0 )); then
echo "Nothing to delete"
exit
fi
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# List songs to delete and ask for confirmation
printf "Deleting %s songs:\n\n%s\n\nConfirm? (y/n) " \
"${#to_delete[@]}" \
"$(IFS=$'\n'; printf "%s" "${to_delete[*]}")"
read -r confirm
case $confirm in
y|Y)
echo "Deleting..."
for file in "${to_delete[@]}"; do
rm -fv "$file"
done
;;
n|N) echo "Aborted"; exit ;;
*) echo "Invalid" ;;
esac
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:>"$playlist_file"
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# Remove duplicates across playlists
for playlist in ${playlist_dir}/*.m3u; do
awk '!seen[$0]++' "${playlist}" > "${playlist}.tmp"
if [[ -f "${playlist}.tmp" ]]; then
rm -f "$playlist"
mv "${playlist}.tmp" "$playlist"
fi
done
# Remove empty directories
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find "$music_dir" -type d -empty -delete