1# Copyright 2020 The Bazel Authors. All rights reserved. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15"""A rule than fails during analysis.""" 16 17def _fail_rule_impl(ctx): 18 if ctx.attr.header: 19 fail("%s %s" % (ctx.attr.header, ctx.attr.message)) 20 else: 21 fail(ctx.attr.message) 22 23fail_rule = rule( 24 doc = "A rule that fails during analysis.", 25 implementation = _fail_rule_impl, 26 attrs = { 27 "header": attr.string( 28 doc = "Header of the message.", 29 ), 30 "message": attr.string( 31 mandatory = True, 32 doc = "Message to display.", 33 ), 34 }, 35) 36