| # Copyright 2020 The Bazel Authors. All rights reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| """A rule than fails during analysis.""" |
| |
| def _fail_rule_impl(ctx): |
| if ctx.attr.header: |
| fail("%s %s" % (ctx.attr.header, ctx.attr.message)) |
| else: |
| fail(ctx.attr.message) |
| |
| fail_rule = rule( |
| doc = "A rule that fails during analysis.", |
| implementation = _fail_rule_impl, |
| attrs = { |
| "header": attr.string( |
| doc = "Header of the message.", |
| ), |
| "message": attr.string( |
| mandatory = True, |
| doc = "Message to display.", |
| ), |
| }, |
| ) |
