Generate webp images from png and jpg files recursively in any web folder (uses webp command line tool)

generate-webp-images

#!/bin/bash

# ---------------------------------------------------------------------------
# Generate WebP Images - Uses cwebp command line tool for Linux
# This will generate / re-generate all webp images for all JPG and PNG files
# Being command line based it is incredibly fast
# If you don't want to re-generate existing files set generateall=0
# If you want to re-generate everything set generateall=1
# USE this script at your own risk and Only if you know what you are doing
# Written by Mitchell Krog - [email protected]
# https://github.com/mitchellkrogza
# ---------------------------------------------------------------------------


# -------- #
# SETTINGS #
# -------- #

generateall=0 # <--- Set to 1 to re-generate all webp files / 0 will only generate missing webp files
mydomain="mydomain.com" # <--- Enter your domain / folder name here
directory="/srv/http/${mydomain}/wp-content/uploads/" # <--- Some servers use /var/www change if necessary - Change folder structure as needed
quality=80

# ------------ #
# END SETTINGS #
# ------------ #


if [[ "${generateall}" == 1 ]]
then
    for file in $(find ${directory} -type f \( -name "*.jpg" -o -name "*.png" \))
    do
        echo "converting ${file}"
        cwebp -q ${quality} -lossless ${file} -o "${file%.*}.webp"
    done
else
    for file in $(find ${directory} -type f \( -name "*.jpg" -o -name "*.png" \))
    do
        if test -f "${file%.*}.webp"
        then
            echo "file exists - skipping"
        else
            echo "convert ${file}"
            cwebp -q ${quality} -lossless ${file} -o "${file%.*}.webp"
        fi
    done
fi


exit 0

May I suggest adding something like

chown -R www-data:www-data ${directory}

at the end of the script?