added mp3_set_artist.sh
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#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2020-07-21 11:36:49 +0100 (Tue, 21 Jul 2020)
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#
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# https://github.com/harisekhon/bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/harisekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC2034
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usage_description="
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Adds / Modifies artist metadata across all mp3 files in the given directories to edit albums or group audiobooks for Mac's Books.app
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Shows the list of MP3 files that would be affected before running the metadata update and prompts for confirmation before proceeding for safety
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="\"artist name\" <dir1> [<dir2> ...]"
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# shellcheck disable=SC1090
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. "$srcdir/lib/utils.sh"
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help_usage "$@"
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min_args 2 "$@"
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check_bin id3v2
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artist="$1"
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shift || :
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mp3_files="$(for dir in "$@"; do find "$dir" -maxdepth 2 -iname '*.mp3' || exit 1; done)"
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echo "List of MP3 files to set artist = '$artist':"
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echo
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echo "$mp3_files"
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echo
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read -r -p "Are you happy to set the artist metadata on all of the following mp3 files to '$*' (y/N) " answer
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if [ "$answer" != "y" ]; then
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echo "Aborting..."
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exit 1
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fi
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echo
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while read -r mp3; do
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echo "setting artist '$artist' on '$mp3'"
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id3v2 --artist "$artist" "$mp3"
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done <<< "$mp3_files"
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