Image Metadata Cleaner

img-clean

#!/bin/bash

# img-clean: remove ALL metadata from images
#   requires ImageMagick

# A POSIX variable
OPTIND=1 # is reset in case getopts was already run

verbose=0
backup=0
exec_args=""

function show_help () {
    echo "usage: img-clean [OPTION]... FILE..."
    echo "Removes all image metadata from popular image formats."
    echo
    echo "    -v    Verbose output."
    echo "    -h    Show this help text."
    echo "    -b    Make a backup file postfixed with '.original' before modifying"
    echo "          image metadata."
    echo
}

while getopts "hvb" arg ; do
    case "$arg" in
        h)
            show_help
            exit 0
            ;;
        v)
            verbose=1
            exec_args="$exec_args -verbose"
            ;;
        b)
            backup=1
            ;;
    esac
done

shift $((OPTIND-1))

[ "$1" = "--" ] && shift 

for file in "$@" ; do
    if [ ! -f "$file" ]; then
        echo "$file doesn't exist."
        exit 1
    fi
     
    if [ $backup = 1 ] ; then
        test $verbose = 1 && echo "Making backup to $file.original..."
        cp "$file" "$file.original"
    fi

    test $verbose = 1 && echo "Cleaning metadata from $file..."
    
    mogrify $exec_args -strip "$file"
done