copyMrtImage

function copyMrtImage(src, dest){
    var srcDir = path.dirname(src),
        srcExt = path.extname(src),
        srcFileName = path.basename(src, srcExt);

    var destDir = path.dirname(dest),
        destExt = path.extname(dest),
        destFileName = path.basename(dest, destExt);

    // all MRT images: logo.png, logo.scale-100.png, logo.scale-200.png, etc
    var images = fs.readdirSync(srcDir).filter(function(e) { 
        return e.match('^'+srcFileName + '(.scale-[0-9]+)?' + srcExt);
    });
    // warn if no images found
    if (images.length == 0) {
        events.emit('warn', 'Image not found: ' + src);
        return;
    }
    // copy images with new name but keeping scale suffix
    images.forEach(function(img) {
        var scale = path.extname(path.basename(img, srcExt)), 
            imgSrc = path.join(srcDir, img),
            imgDest = path.join(destDir, destFileName+scale+destExt);
        events.emit('verbose', 'Copying image from ' + imgSrc + ' to ' + imgDest);
        shell.cp('-f', imgSrc, imgDest);
    });
    
}