replace lossless option

replace option lossless by -z 6 
add cwebp install script

install-optipng.sh

@@ -3,6 +3,7 @@
 sudo apt-get install build-essential libpng-dev -y
 
 cd /usr/local/src
+rm -rf optipng*
 
 OPTIPNGLATEST=$(wget http://optipng.sourceforge.net/ -O - | grep tar.gz | awk -F "[\"]" '{print $4}')
 wget $OPTIPNGLATEST -O optipng.tar.gz

install-webp.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+sudo apt-get install build-essential libjpeg-dev libpng-dev libtiff-dev libgif-dev libwebp-dev -y
+
+cd /usr/local/src || exit
+rm -rf libwebp*
+
+wget https://storage.googleapis.com/downloads.webmproject.org/releases/webp/libwebp-1.0.0.tar.gz -O libwebp.tar.gz
+tar xvzf libwebp.tar.gz
+cd libwebp-* || exit
+./configure
+make -j "$(nproc)"
+sudo make install

optimize.sh

@@ -3,6 +3,10 @@ CSI="\\033["
 CEND="${CSI}0m"
 CGREEN="${CSI}1;32m"
 
+### Set Bins Path ###
+
+FIND=/usr/bin/find
+
 ##################################
 # Welcome
 ##################################
@@ -31,34 +35,34 @@ done
 
 # optimize jpg
 jpgoptimize() {
-find  $imagepath -iname "*.jp*" -print0 | xargs -0 jpegoptim --quiet --strip-all -m76 
+$FIND  $imagepath -iname "*.jp*" -print0 | xargs -0 jpegoptim --quiet --strip-all -m76 
 
         echo -ne "       jpg optimization                      [${CGREEN}OK${CEND}]\\r"
         echo -ne "\\n"
 }
 # optimize png
 pngoptimize() {
-find $imagepath -iname '*.png' -print0 | xargs -0 optipng -o7 -quiet -preserve 
+$FIND $imagepath -iname '*.png' -print0 | xargs -0 optipng -o7 -quiet -preserve 
 
         echo -ne "       png optimization                      [${CGREEN}OK${CEND}]\\r"
         echo -ne "\\n"
 }
 # convert png to webp
 webpconvert() {
-find $imagepath -iname "*.png" -print0 | xargs -0 -I {}  \
+$FIND $imagepath -iname "*.png" -print0 | xargs -0 -I {}  \
 bash -c 'webp_version="$0".webp
 if [ ! -f "$webp_version" ]; then
-{ cwebp -quiet -lossless {} -o {}.webp; }
+{ cwebp -quiet -z 6 -mt {} -o {}.webp; }
 fi' 
 
         echo -ne "       png to webp conversion                      [${CGREEN}OK${CEND}]\\r"
         echo -ne "\\n"
 
 # convert jpg to webp
-find $imagepath -iname "*.jp*" -print0 | xargs -0 -I {} \
+$FIND $imagepath -iname "*.jp*" -print0 | xargs -0 -I {} \
 bash -c 'webp_version="$0".webp
 if [ ! -f "$webp_version" ]; then
-{ cwebp -quiet -lossless {} -o {}.webp; }
+{ cwebp -quiet -z 6 -mt {} -o {}.webp; }
 fi'
 
         echo -ne "       jpg to webp conversion                      [${CGREEN}OK${CEND}]\\r"