Method _main_shell_completion

src/click/core.py:1535–1565

Check if the shell is asking for tab completion, process that, then exit early. Called from :meth:`main` before the program is invoked. :param prog_name: Name of the executable in the shell. :param complete_var: Name of the environment variable that holds

(
        self,
        ctx_args: cabc.MutableMapping[str, t.Any],
        prog_name: str,
        complete_var: str | None = None,
    )

            sys.exit(1)

    def _main_shell_completion(
        self,
        ctx_args: cabc.MutableMapping[str, t.Any],
        prog_name: str,
        complete_var: str | None = None,
    ) -> None:
        """Check if the shell is asking for tab completion, process
        that, then exit early. Called from :meth:`main` before the
        program is invoked.

        :param prog_name: Name of the executable in the shell.
        :param complete_var: Name of the environment variable that holds
            the completion instruction. Defaults to
            ``_{PROG_NAME}_COMPLETE``.

        .. versionchanged:: 8.2.0
            Dots (``.``) in ``prog_name`` are replaced with underscores (``_``).
        """
        if complete_var is None:
            complete_name = prog_name.replace("-", "_").replace(".", "_")
            complete_var = f"_{complete_name}_COMPLETE".upper()

        instruction = os.environ.get(complete_var)

        if not instruction:
            return

        from .shell_completion import shell_complete

        rv = shell_complete(self, ctx_args, prog_name, complete_var, instruction)
        sys.exit(rv)

    def __call__(self, *args: t.Any, **kwargs: t.Any) -> t.Any:
        """Alias for :meth:`main`."""