compress_images.bash

#!/bin/bash

: <<'END'
Copyright (C) 2018 Gitcoin Core

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.

You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
END

command -v optipng >/dev/null 2>&1 || { echo "Running compress_images requires: optipng.  Aborting." >&2; exit 1; }
command -v svgo >/dev/null 2>&1 || { echo "Running compress_images requires: svgo.  Aborting." >&2; exit 1; }
command -v jpeg-recompress >/dev/null 2>&1 || { echo "Running compress_images requires: jpeg-recompress.  Aborting." >&2; exit 1; }

cd app/assets/ || { echo "Environment misconfigured! Couldn't find assets directory!" >&2; exit 1; }

echo "Optimizing project images...  This might take a while..."
echo "Optimizing PNG files..."
find ./ -type f -name '*.png' -exec optipng -o4 {} \;

echo "Squashing SVG files..."
find ./ -type f -name '*.svg' -exec svgo {} \;

echo "Compressing JPG files..."
find ./ -type f -name '*.jpg' -exec jpeg-recompress -a -s -c {} {} \;

echo "Image processing completed!"