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let
pkgs = import <nixpkgs> {};
npkgs = import (builtins.fetchTarball "https://github.com/nixos/nixpkgs/archive/master.tar.gz") {};
youtube-dl = "${npkgs.yt-dlp}/bin/yt-dlp";
# add_link
# download new music from source
# example: add_link
commands.add_link = pkgs.writers.writeDashBin "add_link" ''
${utils.prepare_stream} "$@"
'';
# get_new
# download new music from source
commands.pull = pkgs.writers.writeDashBin "pull" ''
set -euf
${common_header}
echo "run1"
${utils.download_stream} || :
echo "getting new links"
cat "$meta_folder/source" | ${pkgs.findutils}/bin/xargs -n 1 ${utils.get_stream_links}
echo "run2"
${utils.download_stream}
'';
utils.extract_playlist = pkgs.writers.writeDash "utils.extract_playlist" ''
set -euf
${youtube-dl} \
-i -o "http://www.youtube.com/watch?v=%(id)s#%(title)s" \
--restrict-filenames --get-filename $1
'';
commands.add_new = pkgs.writers.writeDashBin "add_new" ''
set -euf
${common_header}
${utils.log_untracked_files} | ${utils.get_links_from_files} >> $meta_folder/links
'';
common_header = ''
target_folder=''${target_folder-./}
meta_folder="$target_folder/.meta"
mkdir -p $meta_folder
touch "$meta_folder/links"
touch "$meta_folder/finished"
touch "$meta_folder/source"
'';
utils.files2links_prefix = pkgs.writers.writeDash "utils.files2links_prefix" ''
${pkgs.gnused}/bin/sed 's,.*\(.\{11\}\)\.ogg,http://www.youtube.com/watch?v=\1,'
'';
utils.links2files_suffix = pkgs.writers.writeDash "utils.links2files_suffix" ''
${pkgs.gnused}/bin/sed 's/.*v=\([^#]*\).*/\1.ogg/'
'';
utils.log_undownloaded_links = pkgs.writers.writeDash "utils.log_undownloaded_links" ''
set -euf
target_folder=''${target_folder-./}
if ! test -e "$target_folder/.meta"; then
echo "run in directory with .meta files"
exit 23
fi
${common_header}
filter_downloaded_links="${pkgs.gnugrep}/bin/grep -v -e $(ls "$target_folder" | ${utils.files2links_prefix} | ${pkgs.gnused}/bin/sed ':a;N;$!ba;s/\n/ -e /g')"
cat "$meta_folder/links" | $filter_downloaded_links
'';
utils.log_untracked_files = pkgs.writers.writeDash "utils.log_untracked_files" ''
set -euf
target_folder=''${target_folder-./}
if ! test -e "$target_folder/.meta"; then
echo "run in directory with .meta files"
exit 23
fi
${common_header}
filter_tracked_files="${pkgs.gnugrep}/bin/grep -v -e $(cat "$meta_folder/links" |${pkgs.gnused}/bin/sed 's/.*v=\([^#]*\).*/\1.ogg/' | ${pkgs.gnused}/bin/sed ':a;N;$!ba;s/\n/ -e /g')"
ls | $filter_tracked_files
'';
utils.get_links_from_files = pkgs.writers.writeDash "utils.get_link_from_file" ''
${pkgs.gnused}/bin/sed 's,.*\(.\{11\}\)\.ogg,http://www.youtube.com/watch?v=\1,' | \
${pkgs.findutils}/bin/xargs -n 1 ${utils.extract_playlist}
'';
utils.prepare_stream = pkgs.writers.writeDash "utils.prepare_stream" ''
set -euf
${common_header}
echo "$@" | ${pkgs.gnugrep}/bin/grep -v -f "$meta_folder/source" >> "$meta_folder/source"
'';
utils.download_stream = pkgs.writers.writeDash "utils.download_stream" ''
set -xeuf
${common_header}
cd "$target_folder"
new_links=$(cat "$meta_folder/links" | ${pkgs.gnugrep}/bin/grep -v -f "$meta_folder/finished")
if test "$(echo "$new_links" | wc -l)" -gt 0; then
echo "$new_links" | ${pkgs.findutils}/bin/xargs -n 1 ${utils.download_ogg} || :
fi
'';
utils.get_stream_links = pkgs.writers.writeDash "utils.get_stream_links" ''
set -xeuf
${common_header}
${utils.extract_playlist} "$1" | ${pkgs.gnugrep}/bin/grep -v -f "$meta_folder/links" | tee -a "$meta_folder/links"
'';
utils.download_ogg = pkgs.writers.writeDash "utils.download_ogg" ''
set -xeuf
${common_header}
TMPDIR=$(mktemp -d)
mkdir -p $TMPDIR
trap "rm -rf $TMPDIR;" INT TERM EXIT
TARGET=$PWD
if ! test "$#" -eq 1; then
echo "wrong number of args"
else
if echo "$1" | ${pkgs.gnugrep}/bin/grep -qf "$meta_folder/finished"; then
echo "already in finished: $1"
fi
id="$(echo "$1" | ${pkgs.gnused}/bin/sed 's@.*youtube.com/watch?v=\([^#]*\)#.*@\1@')"
if ls "$target_folder" | ${pkgs.gnugrep}/bin/grep -Fe "$id.ogg"; then
echo "file already exists: $1"
else
duration=$(${youtube-dl} -J "$1" | ${pkgs.jq}/bin/jq .duration)
if [ "$duration" -le 1000 ] && [ "$duration" -gt 60 ]; then
cd "$TMPDIR"
${youtube-dl} \
-i -o "%(title)s-%(id)s.%(ext)s" \
--restrict-filenames --add-metadata \
--audio-format vorbis \
-x "$1" \
--exec "mv {} $TARGET/"
cd "$TARGET"
fi
fi
echo "$1" >> "$target_folder/.meta/finished"
fi
'';
in pkgs.stdenv.mkDerivation {
name = "youtube-tools";
buildInputs = [
commands.add_link
commands.pull
commands.add_new
(pkgs.writers.writeDashBin "dl-track" ''
${utils.download_ogg} "$@"
'')
];
}
|
