Check WordPress core for unused images.

wp-search-images.sh

#!/bin/bash
# Checks WordPress core for unused images.
# Requires ack2: http://beyondgrep.com/
#
# The script needs to be placed inside the WordPress root
# directory or add the path to the WordPress directory via a
# parameter. Example: $ ./wp-search-images ~/Sites/WordPress/
#
# Define the image paths in img_paths[]
#
# Author: Dominik Schilling, 2012-2013
# https://core.trac.wordpress.org/ticket/20980
# https://core.trac.wordpress.org/ticket/26036

# Image paths
img_paths[0]='wp-admin/images';
img_paths[1]='wp-includes/images';

# Get the WordPress root
wp_root='./'
if [ $1 ] && [ ! -d ${1} ]
	then
		echo "Wrong path!"
		exit;
	else
		if [ $1 ]
			then
				wp_root=$1
		fi
fi

# Check if it's WordPress
if [ ! -f $wp_root/wp-settings.php ]
	then
		echo "No WordPress directory detected!"
		exit
fi

# Get the images and search through WordPress if the image is used. Magic.
for path in "${img_paths[@]}"
	do
		for image in `find $wp_root$path -name "*.gif" -o -name "*.jpg" -o -name "*.png" -o -name "*.jpeg" | grep -v 'crystal'`
			do
				image_name=`basename $image`
				image_file=`echo $image | sed 's|'$wp_root'||'`

				printf "\nSearching for $image_file\n"

				res=`ack "$image_name" $wp_root -l --ignore-dir=wp-content --ignore-file=match:update-core.php`
				if [ $1 ] && [ $1 == -s ] || [ $2 ] && [ $2 == -s ]
					then
						printf "\t%s\n" $res
				fi
				if [ -z "$res" ]
					then
						printf "No match!\n"
						unused_images=("${unused_images[@]}" "$image_file")
					else
						printf "%d matches!\n" `echo "$res" | wc -l`

				fi
			done
	done


# Print the results
printf "\n=================================================="
printf "\n%d images with 0 matches:\n\n" ${#unused_images[@]}
for unused_image in "${unused_images[@]}"
	do
		printf "%s\n" "$unused_image"
	done