webp-convert

webp-convert.sh

#!/bin/bash
# Example run: ./webp-convert.sh /var/www/vhost/domain.nl/webroot

# cleanup, remove webp if jpg/png version does not exist or jpg/png is newer then webp version
echo -e "\033[0;34mCleaning up WEBP images\033[0m"
find $1 -type f -and -iname "*.webp" | while read webpFile; do
    echo "Processing file '$webpFile'"
    basename="${webpFile%.*}"

    # Check if original file still exists.
    [[ ! -z `find $basename{.png,.jpg,.jpeg} 2>/dev/null` ]] && remove=false || remove=true

    # If original file still exists, check if the mtime of the webp version is newer then the original file mtime
    if [ $remove == 'false' ]; then
        echo 'Check if webp is older then original';

        # Retrieve the path of the png/jpg/jpeg file.
        originalFile=`find $basename{.png,.jpg,.jpeg} 2>/dev/null`

        # Check if mtime of webp is newer then png/jpg/jpeg version of the file.
        if [[ $originalFile -nt $webpFile ]]; then
            remove=true
        fi
    fi

    if [ $remove == 'true' ]; then
        echo -e "\033[0;33mREMOVING:  $webpFile, no original image found or original is newer then WEBP version. \033[0m"

        rm $webpFile
    fi
 done

# converting JPEG images
echo -e "\033[0;34mConverting JPEG images\033[0m"
find $1 -type f -and \( -iname "*.jpg" -o -iname "*.jpeg" \) \
-exec bash -c '
webp_path=$(sed 's/\.[^.]*$/.webp/' <<< "$0");
if [ ! -f "$webp_path" ]; then
  cwebp -quiet -q 90 "$0" -o "$webp_path";
fi;' {} \;

# converting PNG images
echo -e "\033[0;34mConverting PNG images\033[0m"
find $1 -type f -and -iname "*.png" \
-exec bash -c '
webp_path=$(sed 's/\.[^.]*$/.webp/' <<< "$0");
if [ ! -f "$webp_path" ]; then
  cwebp -quiet -lossless "$0" -o "$webp_path";
fi;' {} \;

 echo -e "\033[0;34mFinished cleaning up WEBP images\033[0m"