validation.py

            if fpd_with_mismatched_page_types:
                mismatched_fpd, = fpd_with_mismatched_page_types
                raise ValidationError(
                        _("%(loc)s, group '%(group)s', page '%(page)s': "
                            "page type ('%(type_new)s') differs from "
                            "type used in database ('%(type_old)s')")
                        % {"loc": location, "group": grp.id,
                            "page": page_desc.id,
                            "type_new": page_desc.type,
                            "type_old": mismatched_fpd.page_type})

# }}}


def validate_course_content(repo, course_file, events_file,
        validate_sha, course=None):
    course_desc = get_yaml_from_repo_safely(repo, course_file,
            commit_sha=validate_sha)

    vctx = ValidationContext(
            repo=repo,
            commit_sha=validate_sha,
            course=course)

    validate_course_desc_struct(vctx, course_file, course_desc)

    try:
        from course.content import get_yaml_from_repo
        events_desc = get_yaml_from_repo(repo, events_file,
                commit_sha=validate_sha, cached=False)
    except ObjectDoesNotExist:
        if events_file != "events.yml":
            vctx.add_warning(
                    _("Events file"),
                    _("Your course repository does not have an events "
                        "file named '%s'.")
                    % events_file)
        else:
            # That's OK--no calendar info.
            pass
    else:
        validate_calendar_desc_struct(vctx, events_file, events_desc)

    check_attributes_yml(
            vctx, repo, "", get_repo_blob(repo, "", validate_sha))

    try:
        flows_tree = get_repo_blob(repo, "media", validate_sha)
    except ObjectDoesNotExist:
        # That's great--no media directory.
        pass
    else:
        vctx.add_warning(
                'media/', _(
                    "Your course repository has a 'media/' directory. "
                    "Linking to media files using 'media:' is discouraged. "
                    "Use the 'repo:' and 'repocur:' linkng schemes instead."))

    try:
        flows_tree = get_repo_blob(repo, "flows", validate_sha)
    except ObjectDoesNotExist:
        # That's OK--no flows yet.
        pass
    else:
        used_grade_identifiers = set()

        for entry in flows_tree.items():
            entry_path = entry.path.decode("utf-8")
            if not entry_path.endswith(".yml"):
                continue

            from course.constants import FLOW_ID_REGEX
            flow_id = entry_path[:-4]
            match = re.match("^"+FLOW_ID_REGEX+"$", flow_id)
            if match is None:
                raise ValidationError(
                        string_concat("%s: ",
                            _("invalid flow name. "
                                "Flow names may only contain (roman) "
                                "letters, numbers, "
                                "dashes and underscores."))
                        % entry_path)

            location = "flows/%s" % entry_path
            flow_desc = get_yaml_from_repo_safely(repo, location,
                    commit_sha=validate_sha)

            validate_flow_desc(vctx, location, flow_desc)

            # {{{ check grade_identifier

            flow_grade_identifier = None
            if hasattr(flow_desc, "rules"):
                flow_grade_identifier = getattr(
                        flow_desc.rules, "grade_identifier", None)

            if (
                    flow_grade_identifier is not None
                    and
                    set([flow_grade_identifier]) & used_grade_identifiers):
                raise ValidationError(
                        string_concat("%s: ",
                                      _("flow uses the same grade_identifier "
                                        "as another flow"))
                        % location)

            used_grade_identifiers.add(flow_grade_identifier)

            # }}}

            if course is not None:
                check_for_page_type_changes(
                        vctx, location, course, flow_id, flow_desc)

    return vctx.warnings


# {{{ validation script support

class FileSystemFakeRepo(object):
    def __init__(self, root):
        self.root = root

    def controldir(self):
        return self.root

    def __getitem__(self, sha):
        return sha

    def __str__(self):
        return "<FAKEREPO:%s>" % self.root

    def decode(self):
        return self

    @property
    def tree(self):
        return FileSystemFakeRepoTree(self.root)


class FileSystemFakeRepoTreeEntry(object):
    def __init__(self, path, mode):
        self.path = path
        self.mode = mode


class FileSystemFakeRepoTree(object):
    def __init__(self, root):
        self.root = root

    def __getitem__(self, name):
        from os.path import join, isdir, exists
        name = join(self.root, name)

        if not exists(name):
            raise KeyError(name)

        # returns mode, "sha"
        if isdir(name):
            return None, FileSystemFakeRepoTree(name)
        else:
            return None, FileSystemFakeRepoFile(name)

    def items(self):
        import os
        return [
                FileSystemFakeRepoTreeEntry(
                    path=n,
                    mode=os.stat(os.path.join(self.root, n)).st_mode)
                for n in os.listdir(self.root)]


class FileSystemFakeRepoFile(object):
    def __init__(self, name):
        self.name = name

    @property
    def data(self):
        with open(self.name, "rb") as inf:
            return inf.read()


def validate_course_on_filesystem_script_entrypoint():
    from django.conf import settings
    settings.configure(DEBUG=True)

    import django
    django.setup()

    import os
    import argparse
    parser = argparse.ArgumentParser(description='Process some integers.')
    parser.add_argument("--course-file", default="course.yml")
    parser.add_argument("--events-file", default="events.yml")
    parser.add_argument('root', default=os.getcwd())

    args = parser.parse_args()

    fake_repo = FileSystemFakeRepo(args.root)
    warnings = validate_course_content(
            fake_repo,
            args.course_file, args.events_file,
            validate_sha=fake_repo, course=None)

    if warnings:
        print(_("WARNINGS: "))
        for w in warnings:
            print("***", w.location, w.text)

# }}}

# vim: foldmethod=marker