def main(ctx):
    which = "where" if sys.platform == "win32" else "which"
    if envoy.run(which + " git").status_code != 0:
        click.secho("fatal: git not found in PATH", fg="red")
        sys.exit(1)
    ctx.obj = Hydrogen()
def _prepare_streams(self) -> None:
        if self._write_stream is not None:
            return
        if self.filename:
            filepath = os.path.join(self.dirpath, self._prepare_filename())
            fs = get_filesystem(filepath)
            file = fs.open(filepath, "a")
            self._output_file = file
            self._write_stream = file.write
        else:
            self._write_stream = self._rank_zero_info