Nathaniel Brough | fc95cca | 2021-04-18 22:20:26 +0800 | [diff] [blame] | 1 | # Copyright 2021 The Pigweed Authors |
| 2 | # |
| 3 | # Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| 4 | # use this file except in compliance with the License. You may obtain a copy of |
| 5 | # the License at |
| 6 | # |
| 7 | # https://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, WITHOUT |
| 11 | # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 12 | # License for the specific language governing permissions and limitations under |
| 13 | # the License. |
Rob Mohr | d1a1406 | 2021-08-16 12:38:38 -0700 | [diff] [blame] | 14 | """Configure Pigweed's backend implementations.""" |
Nathaniel Brough | fc95cca | 2021-04-18 22:20:26 +0800 | [diff] [blame] | 15 | |
| 16 | def _pigweed_config_impl(repository_ctx): |
| 17 | if repository_ctx.attr.build_file_content and \ |
| 18 | repository_ctx.attr.build_file: |
| 19 | fail("Attributes 'build_file_content' and 'build_file' cannot both be \ |
| 20 | defined at the same time.") |
| 21 | if not repository_ctx.attr.build_file_content and \ |
| 22 | not repository_ctx.attr.build_file: |
| 23 | fail("Either 'build_file_content' or 'build_file' must be defined.") |
| 24 | |
| 25 | if repository_ctx.name != "pigweed_config": |
| 26 | fail("This repository should be name 'pigweed_config'") |
| 27 | |
| 28 | if repository_ctx.attr.build_file_content: |
| 29 | repository_ctx.file("BUILD", repository_ctx.attr.build_file_content) |
| 30 | |
| 31 | if repository_ctx.attr.build_file: |
| 32 | repository_ctx.template("BUILD", repository_ctx.attr.build_file, {}) |
| 33 | |
| 34 | pigweed_config = repository_rule( |
| 35 | _pigweed_config_impl, |
| 36 | attrs = { |
| 37 | "build_file_content": attr.string( |
| 38 | doc = "The build file content to configure Pigweed.", |
| 39 | mandatory = False, |
| 40 | default = "", |
| 41 | ), |
| 42 | "build_file": attr.label( |
| 43 | doc = "The label for the Pigweed config build file to use.", |
| 44 | mandatory = False, |
| 45 | default = "@pigweed//targets/host:host_config.BUILD", |
| 46 | ), |
| 47 | }, |
| 48 | doc = """ |
| 49 | Configure Pigweeds backend implementations. |
| 50 | |
| 51 | Example: |
| 52 | # WORKSPACE |
| 53 | pigweed_config( |
| 54 | # This must use the exact name specified here otherwise this |
| 55 | # remote repository will not function as expected. |
| 56 | name = "pigweed_config", |
| 57 | build_file = "//path/to/config.BUILD", |
| 58 | ) |
| 59 | """, |
| 60 | ) |