Script to download css and fonts from google fonts for local use

wfd.sh

#!/bin/bash
#
# The MIT License (MIT)
#
# Copyright (c) 2017 Tiberio A. Santos
#
# 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.
#
# Script to download css and fonts from google fonts for local use.

if [ -z ${1} ] || [ -z ${2} ]; then
    echo "Missing parameters!
    $0 <CSS URL> <FONT NAME>

    Example:
        $0 https://fonts.googleapis.com/css?family=Open+Sans opensans

    The previous command creates the following directory structure:
        css/opensans.css
        fonts/opensans/ # directory with fonts."
    exit 1
fi

url=${1}
css=css/${2}.css
fonts=fonts/${2}/

_download() {
    wget -q --user-agent="Mozilla/5.0 (X11; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0" "$@"
}

echo 'Creating output directories...'
mkdir -p {css,${fonts}}

echo 'Downloading css...'
_download ${url} -O ${css}

echo 'Downloading fonts...'
for f in $(grep url ${css} | sed 's/.*url(//g;s/).*//g'); do
    _download ${f} -P ${fonts}
done

echo 'Modifying css...'
sed -i 's/https:.*\//..\/'"${fonts//\//\\\/}"'/g' ${css}

echo 'Done!.'