text: """Based on: gist.github.com/MantasVaitkunas/7c16de233812adcb7028."""
  
  import warnings
  
  __licence__ = "BSD (3 clause)"
  
  
  def _html_page_context(app, _pagename, templatename, context, doctree):
      # doctree is None - otherwise viewcode fails
      if templatename != "page.html" or doctree is None:
          return
  
      if not app.config.github_repo:
          warnings.warn("`github_repo` not specified")
          return
  
      # For sphinx_rtd_theme.
      context["display_github"] = True
      context["github_user"] = "theislab"
      context["github_version"] = "master"
      context["github_repo"] = app.config.github_repo
      context["conf_py_path"] = "/docs/source/"
  
  
  def setup(app):  # noqa: D103
      app.add_config_value("github_repo", "", True)
      app.connect("html-page-context", _html_page_context)
  