<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def bake(src):
 """ Runs the encoder on the given source file """

    src = os.path.realpath(src)
    path = os.path.dirname(src)
    filename = os.path.basename(src)
    html = _load_file(src).read()
    if imghdr.what("", html):
        html = "<html><body><img src='{}'/></body></html>".format(cgi.escape(filename))

    # Change to the file's directory so image files with relative paths can be loaded correctly
    cwd = os.getcwd()
    os.chdir(path)
    bs_html = bs4.BeautifulSoup(html, "html.parser")
    images = bs_html.find_all("img")
    for image in images:
        _image_to_data(image)
    for link in bs_html.find_all("link"):
        _bake_css(link)
    for script in bs_html.find_all("script"):
        _bake_script(script)
    os.chdir(cwd)
    return bs_html