Squarespace RSS combiner

squarespace-RSS-combiner.sh

#!/bin/bash
# combines SquareSpace RSS feeds
# Squarespace default feed (e.g., https://www.treehousesheffield.com/events?format=rss) only returns the current month
# This script fetches the current month and the next two months and combines them into a single RSS feed
# The script is intended to be run as a cron job
# It should work for any SquareSpace site (assuming they use the same query variable format)
# usage e.g.,
#  ./combinerss.sh https://www.treehousesheffield.com/events?format=rss > /var/www/html/treehousesheffield.com/events.rss

# get today month and year
today=$(date +"%Y-%m-%d")
year=$(date +"%Y")
month=$(date +"%m")

if [ -z "$1" ]; then
    echo "Usage: $0 <baseurl>"
    exit 1
fi

baseurl=$1
months_ahead=3

all_rss=""

for i in $(seq 1 $months_ahead)
do
    querystring="month=$(printf %02d $month)-$year"

    # fetch the file
    rss=$(curl -s "${baseurl}&${querystring}" | tr -d '\n') 
    # remove header with "<\?xml.*?<\/description>"
    if [ $i -ne 1 ]; then
        rss=$(echo $rss | perl -pe 's/<\?xml.*?<\/description>//g')
    fi
    # remove footer
    if [ $i -ne $months_ahead ]; then
        rss=$(echo $rss | sed 's/<\/channel><\/rss>//g')
    fi
    all_rss="$all_rss$rss"

    month=$((month+1))
    if [ $month -gt 12 ]; then
        month=1
        year=$((year+1))
    fi
done

echo $all_rss