Convert themer.dev SVGs to PNGs for use on Linux (with something like feh, for example)

convert-themer.sh

#!/bin/sh
# Copyright 2019 Ian Stapleton Cordasco
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to 
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 
# sell copies of the Software, and to permit persons to whom the Software is 
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.

set -euxo pipefail

backgroundsDir="$HOME/.backgrounds"

for directory in "Block Wave" "Octagon" "Triangles" "Trianglify"; do
    for file in "$directory"/*; do
        outputFile="$(echo $file | sed -rn -e 's/[^\/]+\/(themer-.*-2560x1440).*.svg/\1.png/p')"
        convert "$file" "$backgroundsDir/$outputFile"
    done
done