| // 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 static com.google.common.collect.Iterables.transform; |
| |
| import com.google.common.base.Functions; |
| import com.google.common.collect.ImmutableList; |
| import java.util.Arrays; |
| |
| /** |
| * Python version for Python rules. |
| */ |
| public enum PythonVersion { |
| PY2, |
| PY3, |
| PY2AND3, |
| PY2ONLY, |
| PY3ONLY; |
| |
| static final PythonVersion[] ALL_VALUES = |
| new PythonVersion[] { PY2, PY3, PY2AND3, PY2ONLY, PY3ONLY }; |
| |
| /** |
| * The Python version to use if not overridden by {@link PythonOptions#forcePython} or a rule's |
| * {@code default_python_version} or {@code srcs_version} attributes. |
| */ |
| static final PythonVersion DEFAULT = PY2; |
| |
| static final PythonVersion[] NON_CONVERSION_VALUES = |
| new PythonVersion[] { PY2AND3, PY2ONLY, PY3ONLY }; |
| |
| static final PythonVersion[] TARGET_PYTHON_VALUES = |
| new PythonVersion[] { PY2, PY3 }; |
| |
| public static PythonVersion defaultSrcsVersion() { |
| return PY2AND3; |
| } |
| |
| public static PythonVersion defaultTargetPythonVersion() { |
| return DEFAULT; |
| } |
| |
| private static Iterable<String> convertToStrings(PythonVersion[] values) { |
| return transform(ImmutableList.copyOf(values), Functions.toStringFunction()); |
| } |
| |
| public static PythonVersion[] getAllVersions() { |
| return ALL_VALUES; |
| } |
| |
| public static Iterable<String> getAllValues() { |
| return convertToStrings(ALL_VALUES); |
| } |
| |
| public static Iterable<String> getNonConversionValues() { |
| return convertToStrings(NON_CONVERSION_VALUES); |
| } |
| |
| public static Iterable<String> getTargetPythonValues() { |
| return convertToStrings(TARGET_PYTHON_VALUES); |
| } |
| |
| /** |
| * Converts the string to PythonVersion, if it is one of the allowed values. |
| * Returns null if the input is not valid. |
| */ |
| public static PythonVersion parse(String str, PythonVersion... allowed) { |
| if (str == null) { |
| return null; |
| } |
| try { |
| PythonVersion version = PythonVersion.valueOf(str); |
| if (Arrays.asList(allowed).contains(version)) { |
| return version; |
| } |
| return null; |
| } catch (IllegalArgumentException e) { |
| return null; |
| } |
| } |
| } |
| |