Serve a page name from git repo (an old version of a page).

    .. note:: this is a bottle view

    * this is a GET only method : you can not change a committed page

    Keyword Arguments:
        :name: (str) -- name of the rest file (without the .rst extension)
        :gitref: (str) -- hexsha of the git commit to look into

    Returns:
        bottle response object or 404 error page

def view_history(name, gitref):
    """Serve a page name from git repo (an old version of a page).

    .. note:: this is a bottle view

    * this is a GET only method : you can not change a committed page

    Keyword Arguments:
        :name: (str) -- name of the rest file (without the .rst extension)
        :gitref: (str) -- hexsha of the git commit to look into

    Returns:
        bottle response object or 404 error page
    """
    response.set_header('Cache-control', 'no-cache')
    response.set_header('Pragma', 'no-cache')
    content = read_committed_file(gitref, name + '.rst')
    if content:
        html_body = publish_parts(content,
                                  writer=AttowikiWriter(),
                                  settings=None,
                                  settings_overrides=None)['html_body']
        history = commit_history(name + '.rst')
        return template('page',
                        type="history",
                        name=name,
                        extended_name=None,
                        is_repo=check_repo(),
                        history=history,
                        gitref=gitref,
                        content=html_body)
    else:
        return abort(404)