Download all enclosures in a podcast/RSS feed

podcastdownloader.sh

#!/usr/bin/env zsh -f
# Purpose: Download enclosures from a podcast feed
#
# From:	Timothy J. Luoma
# Mail:	luomat at gmail dot com
# Date:	2020-09-01

	# this is a variable we can use to refer to the name of this script
	# for example, if the filename is
	# 		/usr/local/bin/podcastdownloader.sh
	# then '$NAME' will be just 'podcastdownloader'

NAME="$0:t:r"

	# if you need other folders included, set them here
PATH='/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin'

	# this needs to be a direct RSS/podcast feed, not iTunes
	# link or soundcloud or something like that
FEED='https://www.relay.fm/mpu/feed'

	# this is where we define what the folder name will be
DIR="$HOME/Music/Podcasts/MacPowerUsers"

	# if the folder does not already exist, let's create it
[[ ! -d "$DIR" ]] && mkdir -p "$DIR"

	# now we're going to 'change directories' into that directory
	# so everything else we do will happen in there:

cd "$DIR"

	# this will set a counter to zero
	# and we will increment it if we run into errors
COUNT='0'

## Now we're going to check the feed for enclosures
## then we're going to look for lines
## that start with 'http' and end with 'mp3'

curl -sfLS "$FEED" \
| fgrep '<enclosure ' \
| tr '"|\047' '\012' \
| egrep '^http.*\.mp3$' \
| while read line
do
		# define a more meaningful variable name
	URL="$line"

		# get the filename from the 'tail' of the URL
	FILENAME="$URL:t"

		# check to see if we already have a file with that name
	if [[ -e "$FILENAME" ]]
	then

		echo "We already have '$PWD/$FILENAME'."

	else

			# download the URL to the $FILENAME
		curl --output "$FILENAME" --silent --location --fail --show-error "$URL"

		EXIT="$?"

		if [[ "$EXIT" == "0" ]]
		then
				# if all went well, tell the user
			echo "Successfully downloaded '$URL' to '$PWD/$FILENAME'."

		else

				## add 1 to the variable '$COUNT' which tells us how many
				## errors we have encountered
			((COUNT++))

				# if something went wrong, tell the user
				# and log to a file on the desktop, where hopefully the user will see it
			echo "$0 failed to download '$URL' to '$PWD/$FILENAME' (\$EXIT = $EXIT)" \
			| tee -a "$HOME/Desktop/$0:t:r.errors.txt"

				# we could use 'rm' here to delete the file, but
				# I always prefer to 'move to the trash' rather than delete
				# because a mistake with 'rm' is usually much worse than a
				# mistake with 'mv'
			mv -vn "$FILENAME" "$HOME/.Trash/$FILENAME.$$.$RANDOM.mp3"

		fi
	fi
done

if [[ "$COUNT" == "0" ]]
then

	echo "$NAME finished with no errors"

elif [[ "$COUNT" == "1" ]]
then

	echo "$NAME finished with 1 error."

else

	echo "$NAME finished with $COUNT errors."

fi

exit 0
#
#EOF