| def my_rule_impl(ctx): | |
| return struct() | |
| rule( | |
| implementation = my_rule_impl, | |
| attrs = { | |
| "first": attr.label(mandatory = True, allow_single_file = True), | |
| "second": attr.string_dict(mandatory = True), | |
| "third": attr.output(mandatory = True), | |
| "fourth": attr.bool(default = False, mandatory = False), | |
| }, | |
| ) |