update script and add cronjob

cron/optimize-cron.sh

@@ -0,0 +1,20 @@
+input="sites.csv"
+while IFS='|' read -r f1 f2
+do
+  imagepath="$f2"
+  # optimize jpg images created in the last 24 hours
+  find $imagepath -iname "*.jp*" -ctime 0 -print0 | xargs -0 jpegoptim --quiet --strip-all -m76
+  # optimize png images created in the last 24 hours
+  find $imagepath -iname '*.png' -ctime 0 -print0 | xargs -0 optipng -o7 -quiet -preserve
+  # convert png to webp
+  find $imagepath -iname "*.png" -ctime 0 -print0 | xargs -0 -I {}  \
+  bash -c 'webp_version="$0".webp
+  if [ ! -f "$webp_version" ]; then
+     { cwebp -quiet -lossless {} -o {}.webp; }
+  fi'
+  find $imagepath -iname "*.jp*" -ctime 0 -print0 | xargs -0 -I {} \
+  bash -c 'webp_version="$0".webp
+  if [ ! -f "$webp_version" ]; then
+  { cwebp -quiet -lossless {} -o {}.webp; }
+  fi' 
+done < "$input"

cron/sites.csv

@@ -0,0 +1,2 @@
+1|/var/www/yoursite.tld/htdocs/wp-content/uploads
+2|/var/www/yourothersite.tld/htdocs/wp-content/uploads

install-optipng.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+sudo apt-get install build-essential libpng-dev -y
+
+cd /usr/local/src
+
+OPTIPNGLATEST=$(wget http://optipng.sourceforge.net/ -O - | grep tar.gz | awk -F "[\"]" '{print $4}')
+wget $OPTIPNGLATEST -O optipng.tar.gz
+tar -xf optipng.tar.gz
+cd optipng-*
+./configure --prefix=/usr
+make -j "$(nproc)"
+sudo make install

optimize.sh

@@ -46,8 +46,7 @@ find $imagepath -iname '*.png' -print0 | xargs -0 optipng -o7 -quiet -preserve
 # convert png to webp
 webpconvert() {
 find $imagepath -iname "*.png" -print0 | xargs -0 -I {}  \
-bash -c '
+bash -c 'webp_version="$0".webp
-webp_version="$0".webp
 if [ ! -f "$webp_version" ]; then
 { cwebp -quiet -lossless {} -o {}.webp; }
 fi' 
@@ -57,9 +56,7 @@ fi'
 
 # convert jpg to webp
 find $imagepath -iname "*.jp*" -print0 | xargs -0 -I {} \
-bash -c '
+bash -c 'webp_version="$0".webp
-webp_version="$0".webp
-
 if [ ! -f "$webp_version" ]; then
 { cwebp -quiet -lossless {} -o {}.webp; }
 fi'