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October 17, 2017 16:57
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Find png files that don't have transparency and convert to jpg, also recompress all jpg files for the web
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#!/bin/sh | |
echo You should have the project tracked by version control in case something goes wrong. | |
printf 'Press any key to continue...' | |
read -r | |
path=${1:-.} | |
echo Optimizing images in "$path" | |
if [ -z "$(command -v jpeg-recompress)" ] || [ -z "$(command -v ladon)" ] || [ -z "$(command -v mogrify)" ]; then | |
echo You need ladon, ImageMagick, and jpeg-archive to be able to run this script | |
exit 1 | |
fi | |
transparency_test() { | |
if [ "$(identify -format '%[channels]' "$1")" = "srgb" ]; then | |
echo "$1" | |
fi | |
} | |
export -f transparency_test | |
find_pngs_with_no_tranparency() { | |
find "$path" -type f -name "*.png" -exec sh -c 'transparency_test "$1"' _ {} \; | |
} | |
pngs=$(find_pngs_with_no_tranparency) | |
if [ "$pngs" ]; then | |
echo "$pngs" | xargs mogrify -format jpg | |
echo "$pngs" | xargs rm | |
ladon "$path/**/*.jpg" -- jpeg-recompress FULLPATH FULLPATH | |
echo "Done!" | |
else | |
echo "No PNG files to compress!" | |
fi | |
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