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#! /usr/bin/env sh
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
main()
{
# Handle opts
opts "$@"
shift "$OPTS"
unset OPTS
# Show help
[ "$OPT_HELP_ONLY" ] && usage && exit 0
for url in $@
do
curl -s "$url" \
| grep -Eo 'https://www.youtube.com/feeds/videos.xml?[^"]+' \
| head -n1
done
# An alternate solution to grep -E
# perl -n -e 'm@(https://www.youtube.com/feeds/videos.xml\?[^"]+)@ and print "$1\n"'
}
opts()
{
OPTS=0
while getopts ":h" opt
do
case "$opt" in
h) OPT_HELP_ONLY=1 ;;
*)
printf "Invalid option passed: %s\n" "$OPTARG" >&2
;;
esac
done
unset opt
}
usage()
{
cat <<EOF
Usage:
$(basename "$0") -h
$(basename "$0") <url> [ <urls> ... ]
Get the RSS feed URL of a YouTube channel through the channel's page URL.
Options:
-h Show this help text and exit.
EOF
}
main "$@"
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