Zsh functions for easily "fixing" iOS-optimized PNG files

gistfile1.sh

function fixpng ()
{
        if [[ ! -f $1 ]] ; then
                echo "Usage: fixpng <inputFiles> [outputFile]"
                return -1
        else
                local inputFile=$1
                local outputFile=$1
                if [[ -e $2 ]] ; then
                        outputFile=$2
                else
                        zmodload zsh/regex
                        local baseName=$1
                        [[ $inputFile -regex-match "^(.*).png" ]] && baseName=$match[1]
                        outputFile=$baseName-fixed.png
                fi

                echo Writing fixed PNG to $outputFile

                "`xcode-select -print-path`/Platforms/iPhoneOS.platform/Developer/usr/bin/pngcrush" -q -revert-iphone-optimizations $inputFile $outputFile
        fi
}

# Fix a whole mess of pngs at once
fixpngs ()
{
        if [[ ! -f $1 ]] ; then
                echo "Usage: fixpng <inputFiles> [outputFile]"
                return -1
        else
                for i in "$@"; do fixpng ./"$i"; done;
        fi
}