djelectricsamurai.sh

#!/bin/bash
# This script will:
#  * Download DJ Electric Samurai's Progressive Psytrance mixes from youtube
#  * split them into individual MP3s
#  * tag them with a reasonable amount of metadata
#  * import them into Music.app (née iTunes)
#
# Dependencies:
#  * yt-dlp
#  * mid3v2 (from the mutagen project)

set -u
set -o pipefail

DATA=~/.djelectricsamurai.dat
OUTDIR=~/Music/Music/Media.localized/Automatically\ Add\ to\ Music.localized

echo "Fetching channel playlist..."
PLAYLIST="$(yt-dlp --flat-playlist --print "%(id)s||%(title)s" 'https://www.youtube.com/@DJElectricSamurai' | grep -i "||Progressive Psytrance" | sed -E -e 's/[pP]rogressive [Pp]sytrance //' -e 's/mix //' -e 's#/##g')"

echo "${PLAYLIST}" | while read -r line ; do
    ID="$(echo "${line}" | sed -e 's/\(.*\)||.*/\1/g')"
    NAME="$(echo "${line}" | sed -e 's/.*||\(.*\)/\1/g')"

    grep -q "${ID}" "${DATA}"
    if [ "$?" == "0" ]; then
        # We processed this one already
        echo "  skipping ${ID}"
        continue
    fi

    TMPDIR="$(mktemp -d)"
    if [ "$?" != "0" ]; then
        echo "ERROR: Unable to mktemp"
        exit 1
    fi
    echo "  working in ${TMPDIR}"
    pushd "${TMPDIR}" >/dev/null

    echo "  fetching ${ID}..."
    yt-dlp -f 'bestaudio[ext=m4a]' -x --audio-format mp3 --audio-quality 0 --split-chapters -o 'chapter:%(section_title)s.%(ext)s' --add-metadata --write-thumbnail --embed-metadata --convert-thumbnails jpg --exec rm https://www.youtube.com/watch?v=${ID}
    COVART="$(ls *.jpg | head -1)"

    TCNT=$(ls *.mp3 | wc -l)
    for track in *.mp3 ; do
        TNUM="$(echo "${track}" | sed -e 's/\.\..*//')"
        TART="$(echo "${track}" | sed -e 's/.*\.\.\(.*\) - .*/\1/')"
        TNAM="$(echo "${track}" | sed -e 's/.* - \(.*\)\..*/\1/')"

        echo "  writing ID3 for ${NAME} :: ${TNUM} :: ${TNAM} :: -> ${track}"
        mid3v2 --delete-frames=CHAP -A "${NAME}" -t "${TNAM}" --TPE2 "DJ Electric Samurai" -T "${TNUM}/${TCNT}" -a "${TART}" -p "${COVART}" -g "Progressive Psytrance" "${track}"
    done

    DST="${OUTDIR}/${NAME}"
    mkdir "${DST}"
    rm *.jpg
    mv * "${DST}"

    echo "${ID}" >> "${DATA}"
    echo "  leaving ${TMPDIR}"
    popd >/dev/null
    rmdir "${TMPDIR}"
done