| // Copyright 2014 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. |
| package com.google.devtools.build.lib.rules.python; |
| |
| import com.google.devtools.build.lib.analysis.LanguageDependentFragment.LibraryLanguage; |
| import com.google.devtools.build.lib.packages.RawAttributeMapper; |
| import com.google.devtools.build.lib.packages.RuleClass; |
| import com.google.devtools.build.lib.packages.RuleTransitionFactory; |
| import com.google.devtools.build.lib.syntax.Type; |
| import com.google.devtools.build.lib.util.FileType; |
| |
| /** |
| * Rule definitions for Python rules. |
| */ |
| public class PyRuleClasses { |
| |
| public static final FileType PYTHON_SOURCE = FileType.of(".py"); |
| public static final LibraryLanguage LANGUAGE = new LibraryLanguage("Python"); |
| |
| /** |
| * Input for {@link RuleClass.Builder#cfg(RuleTransitionFactory)}: if |
| * {@link PythonOptions#forcePython} is unset, sets the Python version according to the rule's |
| * default Python version. Assumes the rule has the expected attribute for this setting. |
| * |
| * <p>Since this is a configuration transition, this propagates to the rules' transitive deps. |
| */ |
| public static final RuleTransitionFactory DEFAULT_PYTHON_VERSION_TRANSITION = |
| (rule) -> |
| new PythonVersionTransition( |
| PythonVersion.parse( |
| RawAttributeMapper.of(rule).get("default_python_version", Type.STRING), |
| PythonVersion.ALL_VALUES)); |
| } |