#!/usr/bin/env bash readonly DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"; cd $DIR; set -e set -u set -o pipefail standardIFS="$IFS" IFS=$'\n\t'

# To use this script you'll need to install: # - jpegoptim # - optipng # # As well as set the mediaDir and skinDir below.

function echoTopLevelMsg() { echo "[ $(date +%Y.%m.%dT%H:%M:%S) ] ===== $1 ====="; }

echoTopLevelMsg "Running optimisation script";

function usage() { echo " $0 <period> - period: number of minutes since the script last ran (defaults to all images) "; }

function checkDependency() { local dependency=$1;

command -v ${dependency} >/dev/null 2>&1 || { echo >&2 "Please install '${dependency}' and then rerun this script."; exit 1; } }

function processImages() { local baseDir="$1"; local match="$2"; local tool="$3"; shift 3;

echo "Processing images using: baseDir=${baseDir} period=-${period} match=${match} tool=${tool} toolArgs=$@";

# Used \; in place of + because jpegoptim isn't able to handle large numbers of files in one go. local periodFilter="" if [[ "${period}" != "0" ]] then find ${baseDir} -type f -mmin -${period} -iregex ${match} -exec ${tool} "$@" {} \; else find ${baseDir} -type f -iregex ${match} -exec ${tool} "$@" {} \; fi

echo "Processing complete"; }

function optimiseJpeg() { local match='.*\.jpg\|.*\.jpeg'; local tool='jpegoptim';

checkDependency ${tool};

processImages ${mediaDir} ${match} ${tool} --strip-all -o; processImages ${skinDir} ${match} ${tool} --strip-all -o; }

function optimisePng() { local match='.*\.png'; local tool='optipng';

checkDependency ${tool};

processImages ${mediaDir} ${match} ${tool} -o2 -strip all; processImages ${skinDir} ${match} ${tool} -o2 -strip all; }

#defaults to processing all readonly period=${1:-0};

readonly mediaDir="${DIR}/path/to/media"; readonly skinDir="${DIR}/path/to/skin";

if [ ! -d "${mediaDir}" ]; then echo "${mediaDir} does not exist"; exit 1; fi

if [ ! -d "${skinDir}" ]; then echo "${skinDir} does not exist"; exit 1; fi

echoTopLevelMsg "Optimising JPG's"; optimiseJpeg;

echoTopLevelMsg "Optimising PNG's"; optimisePng;