function getExcerptByMoreTag(file, regExp) {
    var excerpt = false,
        contents = file.contents.toString();
    contents = cheerio.load('<root>' + contents + '</root>', {decodeEntities: false})('root').html();
    var match = contents.search(regExp);
    if (match > -1) {
        excerpt = contents.slice(0, match);
        excerpt = v.unescapeHtml(excerpt);
    }
    return excerpt;
}