Nautilus image conversion plugin

convert-image.sh

#!/usr/bin/env bash
# Requires imagemagick to be installed and PATH-accesible
# Place in ~/.local/share/nautilus/scripts
# Call `nautilus -q` and start a new nautilus instance to load.

EXT_OUTPUT=$(
    zenity --list \
        --title="Convert image" \
        --print-column=1 \
        --column="Extension" \
        jpeg png webp
)

if [ -z "${EXT_OUTPUT}" ]; then
    exit 0
fi

while IFS= read -r PATH_INPUT; do
    PATH_DIR_PARENT="$(dirname "${PATH_INPUT}")"
    NAME_NO_EXT=$(basename "$PATH_INPUT" | cut -d. -f1)
    PATH_OUTPUT="${PATH_DIR_PARENT}/${NAME_NO_EXT}.${EXT_OUTPUT}"

    convert "${PATH_INPUT}" "${PATH_OUTPUT}"
done <<<"${NAUTILUS_SCRIPT_SELECTED_FILE_PATHS}"