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#!/bin/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.
readonly ROOTDIR="$(CDPATH="" cd -- "$(dirname -- "$0")/.." && pwd -P)"
main()
{
# Handle opts
while getopts ":h" opt
do
case "$opt" in
h) usage && exit 0 ;;
*)
printf "Invalid option passed: %s\n" "$OPTARG" >&2
;;
esac
done
shift $(( OPTIND - 1 ))
# Make a list of all unique tags
tags="$(mktemp)"
awk '/^tags:/ { for (i=2; i<=NF; i++) print $i }' "$ROOTDIR/src/_posts/"* \
| sort \
| uniq \
> "$tags"
# Create a feed for each tag
mkdir -p -- "$ROOTDIR/src/feed"
mkdir -p -- "$ROOTDIR/src/atom"
while read -r tag
do
lc_tag="$(printf "%s" "$tag" | tr "[:upper:]" "[:lower:]")"
echo "Creating RSS 2.0 feed for $lc_tag"
TAG="$tag" envsubst < "$ROOTDIR/share/feed-rss2.xml" > "$ROOTDIR/src/feed/$lc_tag.xml"
echo "Creating Atom feed for $lc_tag"
TAG="$tag" envsubst < "$ROOTDIR/share/feed-atom.xml" > "$ROOTDIR/src/atom/$lc_tag.xml"
unset lc_tag
done < "$tags"
# Clean up
rm -f -- "$tags"
}
usage()
{
cat <<EOF
Usage:
${0##*/} -h
Generate all the seperate feeds for each tag used in posts.
Options:
-h Show this help text and exit.
EOF
}
main "$@"
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