def populate_lic_qa_checksum(d):
    """
    Check for changes in the license files.
    """

    lic_files = d.getVar('LIC_FILES_CHKSUM') or ''
    lic = d.getVar('LICENSE')
    pn = d.getVar('PN')

    if lic == "CLOSED":
        return

    if not lic_files and d.getVar('SRC_URI'):
        oe.qa.handle_error("license-checksum", pn + ": Recipe file fetches files and does not have license file information (LIC_FILES_CHKSUM)", d)

    srcdir = d.getVar('S')
    corebase_licensefile = d.getVar('COREBASE') + "/LICENSE"
    for url in lic_files.split():
        try:
            (type, host, path, user, pswd, parm) = bb.fetch.decodeurl(url)
        except bb.fetch.MalformedUrl:
            oe.qa.handle_error("license-checksum", pn + ": LIC_FILES_CHKSUM contains an invalid URL: " + url, d)
            continue
        srclicfile = os.path.join(srcdir, path)
        if not os.path.isfile(srclicfile):
            oe.qa.handle_error("license-checksum", pn + ": LIC_FILES_CHKSUM points to an invalid file: " + srclicfile, d)
            continue

        if (srclicfile == corebase_licensefile):
            bb.warn("${COREBASE}/LICENSE is not a valid license file, please use '${COMMON_LICENSE_DIR}/MIT' for a MIT License file in LIC_FILES_CHKSUM. This will become an error in the future")

        recipemd5 = parm.get('md5', '')
        beginline, endline = 0, 0
        if 'beginline' in parm:
            beginline = int(parm['beginline'])
        if 'endline' in parm:
            endline = int(parm['endline'])

        if (not beginline) and (not endline):
            md5chksum = bb.utils.md5_file(srclicfile)
            with open(srclicfile, 'r', errors='replace') as f:
                license = f.read().splitlines()
        else:
            with open(srclicfile, 'rb') as f:
                import hashlib
                lineno = 0
                license = []
                try:
                    m = hashlib.new('MD5', usedforsecurity=False)
                except TypeError:
                    m = hashlib.new('MD5')
                for line in f:
                    lineno += 1
                    if (lineno >= beginline):
                        if ((lineno <= endline) or not endline):
                            m.update(line)
                            license.append(line.decode('utf-8', errors='replace').rstrip())
                        else:
                            break
                md5chksum = m.hexdigest()
        if recipemd5 == md5chksum:
            bb.note (pn + ": md5 checksum matched for ", url)
        else:
            if recipemd5:
                msg = pn + ": The LIC_FILES_CHKSUM does not match for " + url
                msg = msg + "\n" + pn + ": The new md5 checksum is " + md5chksum
                max_lines = int(d.getVar('QA_MAX_LICENSE_LINES') or 20)
                if not license or license[-1] != '':
                    # Ensure that our license text ends with a line break
                    # (will be added with join() below).
                    license.append('')
                remove = len(license) - max_lines
                if remove > 0:
                    start = max_lines // 2
                    end = start + remove - 1
                    del license[start:end]
                    license.insert(start, '...')
                msg = msg + "\n" + pn + ": Here is the selected license text:" + \
                        "\n" + \
                        "{:v^70}".format(" beginline=%d " % beginline if beginline else "") + \
                        "\n" + "\n".join(license) + \
                        "{:^^70}".format(" endline=%d " % endline if endline else "")
                if beginline:
                    if endline:
                        srcfiledesc = "%s (lines %d through to %d)" % (srclicfile, beginline, endline)
                    else:
                        srcfiledesc = "%s (beginning on line %d)" % (srclicfile, beginline)
                elif endline:
                    srcfiledesc = "%s (ending on line %d)" % (srclicfile, endline)
                else:
                    srcfiledesc = srclicfile
                msg = msg + "\n" + pn + ": Check if the license information has changed in %s to verify that the LICENSE value \"%s\" remains valid" % (srcfiledesc, lic)

            else:
                msg = pn + ": LIC_FILES_CHKSUM is not specified for " +  url
                msg = msg + "\n" + pn + ": The md5 checksum is " + md5chksum
            oe.qa.handle_error("license-checksum", msg, d)

    oe.qa.exit_if_errors(d)

populate_lic_qa_checksum(d)