Merge walk and find_files in makemessages command

    output, errors = p.communicate()

    return output, errors, p.returncode

def walk(root, topdown=True, onerror=None, followlinks=False,

         ignore_patterns=None, verbosity=0, stdout=sys.stdout):

def find_files(root, ignore_patterns, verbosity, stdout=sys.stdout, symlinks=False):

    """

    A version of os.walk that can follow symlinks for Python < 2.6

    Helper function to get all files in the given root.

    """

    if ignore_patterns is None:

        ignore_patterns = []

    dir_suffix = '%s*' % os.sep

    norm_patterns = [p[:-len(dir_suffix)] if p.endswith(dir_suffix) else p for p in ignore_patterns]

    for dirpath, dirnames, filenames in os.walk(root, topdown, onerror):

        remove_dirs = []

        for dirname in dirnames:

    all_files = []

    for dirpath, dirnames, filenames in os.walk(root, topdown=True, followlinks=symlinks):

        for dirname in dirnames[:]:

            if is_ignored(os.path.normpath(os.path.join(dirpath, dirname)), norm_patterns):

                remove_dirs.append(dirname)

        for dirname in remove_dirs:

                dirnames.remove(dirname)

                if verbosity > 1:

                    stdout.write('ignoring directory %s\n' % dirname)

        yield (dirpath, dirnames, filenames)

        if followlinks:

            for d in dirnames:

                p = os.path.join(dirpath, d)

                if os.path.islink(p):

                    for link_dirpath, link_dirnames, link_filenames in walk(p):

                        yield (link_dirpath, link_dirnames, link_filenames)

        for filename in filenames:

            if is_ignored(os.path.normpath(os.path.join(dirpath, filename)), ignore_patterns):

                if verbosity > 1:

                    stdout.write('ignoring file %s in %s\n' % (filename, dirpath))

            else:

                all_files.extend([(dirpath, filename)])

    all_files.sort()

    return all_files

def is_ignored(path, ignore_patterns):

    """

            return True

    return False

def find_files(root, ignore_patterns, verbosity, stdout=sys.stdout, symlinks=False):

    """

    Helper function to get all files in the given root.

    """

    all_files = []

    for (dirpath, dirnames, filenames) in walk(root, followlinks=symlinks,

            ignore_patterns=ignore_patterns, verbosity=verbosity, stdout=stdout):

        for filename in filenames:

            norm_filepath = os.path.normpath(os.path.join(dirpath, filename))

            if is_ignored(norm_filepath, ignore_patterns):

                if verbosity > 1:

                    stdout.write('ignoring file %s in %s\n' % (filename, dirpath))

            else:

                all_files.extend([(dirpath, filename)])

    all_files.sort()

    return all_files

def copy_plural_forms(msgs, locale, domain, verbosity, stdout=sys.stdout):

    """

    Copies plural forms header contents from a Django catalog of locale to