Method format_usage

src/click/core.py:1124–1130

Writes the usage line into the formatter. This is a low-level method called by :meth:`get_usage`.

(self, ctx: Context, formatter: HelpFormatter)

        return params

    def format_usage(self, ctx: Context, formatter: HelpFormatter) -> None:
        """Writes the usage line into the formatter.

        This is a low-level method called by :meth:`get_usage`.
        """
        pieces = self.collect_usage_pieces(ctx)
        formatter.write_usage(ctx.command_path, " ".join(pieces))

    def collect_usage_pieces(self, ctx: Context) -> list[str]:
        """Returns all the pieces that go into the usage line and returns