Download youtube playlist

sync.sh

#!/bin/bash

# usage:
#   # if you install youtube-dl locally
#   $ type youtube-dl
#   youtube-dl 是 /usr/bin/youtube-dl
#   $ bash sync.sh
#
#   # if you use youtube-dl by docker alias
#   $ type youtube-dl 
#   youtube-dl 是「docker run --rm -i -e PGID=$(id -g) -e PUID=$(id -u) -v "$(pwd)":/workdir:rw mikenye/youtube-dl」的別名
#   $ . sync.sh
#   

ERR_YTDL_CMD=1
ERR_JQ_CMD=2
ERR_PL_DIR=3

if [[ -z $(command -v youtube-dl) ]] ;then
  >&2 echo "Error: Command 'youtube-dl' is not found"
  exit "${ERR_YTDL_CMD}"
fi

if [[ -z $(command -v jq) ]] ;then
  >&2 echo "Error: Command 'jq' is not found"
  exit "${ERR_JQ_CMD}"
fi

YTDL_VERSION=$(youtube-dl --version)
echo "youtube-dl v${YTDL_VERSION}"

ROOT_DIR="$(pwd)"

PLAYLISTS=(
  # Aoi ch.
  'PLFPYP7GcgzUQD-sMeyh_OO1DGIA4ez52A' # 全カバー動画（投稿順）
  'PLFPYP7GcgzUQNGMz8pQVgfU4vtegwu2iB' # 富士葵オリジナル曲

  # HIMEHINA Channel
  'PL1tX8zAv8bPkOg13XRuyrNsFQw8X2d6CQ' # ヒメヒナMusic

  # QuonTama Ch. 久遠たま
  'PLLDVHep1V7dwo23o8LjXgCACtzXpXTBrU' # 【公式切り抜き】
  'PLLDVHep1V7dzkyTizvIiRuZUrz5jMu99G' # 【song】
  'PLLDVHep1V7dxq32eiO7Hj4q2aEAeIgbU-' # #くぉんたま【sing🎤】

  # 芦澤サキ / SAKI ASHIZAWA
  'PLk2NROpUvNYTp24jG9JfgI1zNhVShplbX' # covered by 芦澤 サキ
)

# FORMAT SELECTION
# https://github.com/ytdl-org/youtube-dl/blob/master/README.md#format-selection
QUALITY='bestvideo+bestaudio/best'

for PL_ID in "${PLAYLISTS[@]}"; do
  PL_META=$(youtube-dl -ciJ "${PL_ID}")
  PL_NAME=$(jq -r '.title' <<< "${PL_META}" | sed 's~/~／~')
  CHANNEL_NAME=$(jq -r '.uploader' <<< "${PL_META}" | sed 's~/~／~')
  PL_DIR="${ROOT_DIR}/${CHANNEL_NAME}/${PL_NAME}"
  mkdir -p "${PL_DIR}" && cd "${PL_DIR}" || exit "${ERR_PL_DIR}"

  echo "Info: ${CHANNEL_NAME} :: ${PL_NAME}"

  VIDEO_IDS=( $(jq -r '.entries[].id | select(. != null)' <<< "${PL_META}") )
  for VIDEO_ID in "${VIDEO_IDS[@]}"; do
    youtube-dl -ci -f "${QUALITY}" "https://youtu.be/${VIDEO_ID}"

    # handle duplicated
    LINE_COUNT=$(find -name "*$VIDEO_ID*" | wc -l)
    if [[ "$LINE_COUNT" -gt 1 ]]; then
      LATEST_DUP_VIDEO_NAME=
      LATEST_DUP_VIDEO_LAST_MODIFIED=
      find -name "*$VIDEO_ID*" | while read -r DUP_VIDEO; do
        LAST_MODIFIED=$(stat -c '%Y' "$DUP_VIDEO")
        if [[ -z "$LATEST_DUP_VIDEO_NAME" ]]; then
          LATEST_DUP_VIDEO_NAME="$DUP_VIDEO"
          LATEST_DUP_VIDEO_LAST_MODIFIED="$LAST_MODIFIED"
        fi

        if [[ "$LAST_MODIFIED" -gt "$LATEST_DUP_VIDEO_LAST_MODIFIED" ]]; then
          rm -f "$LATEST_DUP_VIDEO_NAME"
          LATEST_DUP_VIDEO_NAME="$DUP_VIDEO"
          LATEST_DUP_VIDEO_LAST_MODIFIED="$LAST_MODIFIED"
        fi
      done
    fi
  done

done

cd "$ROOT_DIR"

# youtube-dl options
# https://github.com/ytdl-org/youtube-dl/blob/master/README.md#options
#
# -i, --ignore-errors                  Continue on download errors, for
#                                      example to skip unavailable videos in a
#                                      playlist
## Filesystem Options:
# -c, --continue                       Force resume of partially downloaded
#                                      files. By default, youtube-dl will
#                                      resume downloads if possible.
## Verbosity / Simulation Options:
# -j, --dump-json                      Simulate, quiet but print JSON
#                                      information. See the "OUTPUT TEMPLATE"
#                                      for a description of available keys.
# -J, --dump-single-json               Simulate, quiet but print JSON
#                                      information for each command-line
#                                      argument. If the URL refers to a
#                                      playlist, dump the whole playlist
#                                      information in a single line.