| // Copyright 2015 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.bazel.rules.python; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.devtools.build.lib.analysis.config.BuildConfiguration; |
| import com.google.devtools.build.lib.analysis.config.BuildConfiguration.Fragment; |
| import com.google.devtools.build.lib.analysis.config.BuildOptions; |
| import com.google.devtools.build.lib.analysis.config.ConfigurationFragmentFactory; |
| import com.google.devtools.build.lib.analysis.config.CoreOptionConverters.LabelConverter; |
| import com.google.devtools.build.lib.analysis.config.FragmentOptions; |
| import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable; |
| import com.google.devtools.build.lib.events.Event; |
| import com.google.devtools.build.lib.events.EventHandler; |
| import com.google.devtools.build.lib.rules.python.PythonOptions; |
| import com.google.devtools.build.lib.vfs.PathFragment; |
| import com.google.devtools.common.options.Option; |
| import com.google.devtools.common.options.OptionDocumentationCategory; |
| import com.google.devtools.common.options.OptionEffectTag; |
| import com.google.devtools.common.options.OptionMetadataTag; |
| |
| /** Bazel-specific Python configuration. */ |
| @Immutable |
| public class BazelPythonConfiguration extends BuildConfiguration.Fragment { |
| |
| /** Bazel-specific Python configuration options. */ |
| public static final class Options extends FragmentOptions { |
| @Option( |
| name = "python2_path", |
| defaultValue = "null", |
| documentationCategory = OptionDocumentationCategory.TOOLCHAIN, |
| effectTags = {OptionEffectTag.NO_OP}, |
| metadataTags = {OptionMetadataTag.DEPRECATED}, |
| help = "Deprecated, no-op. Disabled by `--incompatible_use_python_toolchains`.") |
| public String python2Path; |
| |
| @Option( |
| name = "python3_path", |
| defaultValue = "null", |
| documentationCategory = OptionDocumentationCategory.TOOLCHAIN, |
| effectTags = {OptionEffectTag.NO_OP}, |
| metadataTags = {OptionMetadataTag.DEPRECATED}, |
| help = "Deprecated, no-op. Disabled by `--incompatible_use_python_toolchains`.") |
| public String python3Path; |
| |
| @Option( |
| name = "python_top", |
| converter = LabelConverter.class, |
| defaultValue = "null", |
| documentationCategory = OptionDocumentationCategory.TOOLCHAIN, |
| effectTags = {OptionEffectTag.LOADING_AND_ANALYSIS, OptionEffectTag.AFFECTS_OUTPUTS}, |
| help = |
| "The label of a py_runtime representing the Python interpreter invoked to run Python " |
| + "targets on the target platform. Deprecated; disabled by " |
| + "--incompatible_use_python_toolchains.") |
| public Label pythonTop; |
| |
| @Option( |
| name = "python_path", |
| defaultValue = "null", |
| documentationCategory = OptionDocumentationCategory.TOOLCHAIN, |
| effectTags = {OptionEffectTag.LOADING_AND_ANALYSIS, OptionEffectTag.AFFECTS_OUTPUTS}, |
| help = |
| "The absolute path of the Python interpreter invoked to run Python targets on the " |
| + "target platform. Deprecated; disabled by --incompatible_use_python_toolchains.") |
| public String pythonPath; |
| |
| @Option( |
| name = "experimental_python_import_all_repositories", |
| defaultValue = "true", |
| documentationCategory = OptionDocumentationCategory.UNDOCUMENTED, |
| effectTags = {OptionEffectTag.LOADING_AND_ANALYSIS}, |
| help = |
| "If true, the roots of repositories in the runfiles tree are added to PYTHONPATH, so " |
| + "that imports like `import mytoplevelpackage.package.module` are valid." |
| + " Regardless of whether this flag is true, the runfiles root itself is also" |
| + " added to the PYTHONPATH, so " |
| + "`import myreponame.mytoplevelpackage.package.module` is valid. The latter form " |
| + "is less likely to experience import name collisions.") |
| public boolean experimentalPythonImportAllRepositories; |
| |
| /** |
| * Make Python configuration options available for host configurations as well |
| */ |
| @Override |
| public FragmentOptions getHost() { |
| return clone(); // host options are the same as target options |
| } |
| } |
| |
| /** |
| * Loader for the Bazel-specific Python configuration. |
| */ |
| public static final class Loader implements ConfigurationFragmentFactory { |
| @Override |
| public Fragment create(BuildOptions buildOptions) |
| throws InvalidConfigurationException { |
| BazelPythonConfiguration pythonConfiguration |
| = new BazelPythonConfiguration(buildOptions.get(Options.class)); |
| |
| String pythonPath = pythonConfiguration.getPythonPath(); |
| if (!pythonPath.startsWith("python") && !PathFragment.create(pythonPath).isAbsolute()) { |
| throw new InvalidConfigurationException( |
| "python_path must be an absolute path when it is set."); |
| } |
| |
| return pythonConfiguration; |
| } |
| |
| @Override |
| public Class<? extends Fragment> creates() { |
| return BazelPythonConfiguration.class; |
| } |
| |
| @Override |
| public ImmutableSet<Class<? extends FragmentOptions>> requiredOptions() { |
| return ImmutableSet.of(Options.class, PythonOptions.class); |
| } |
| } |
| |
| private final Options options; |
| |
| private BazelPythonConfiguration(Options options) { |
| this.options = options; |
| } |
| |
| @Override |
| public void reportInvalidOptions(EventHandler reporter, BuildOptions buildOptions) { |
| PythonOptions pythonOpts = buildOptions.get(PythonOptions.class); |
| Options opts = buildOptions.get(Options.class); |
| if (pythonOpts.incompatibleUsePythonToolchains) { |
| // Forbid deprecated flags. |
| if (opts.python2Path != null) { |
| reporter.handle( |
| Event.error( |
| "`--python2_path` is disabled by `--incompatible_use_python_toolchains`. Since " |
| + "`--python2_path` is a deprecated no-op, there is no need to pass it.")); |
| } |
| if (opts.python3Path != null) { |
| reporter.handle( |
| Event.error( |
| "`--python3_path` is disabled by `--incompatible_use_python_toolchains`. Since " |
| + "`--python3_path` is a deprecated no-op, there is no need to pass it.")); |
| } |
| if (opts.pythonTop != null) { |
| reporter.handle( |
| Event.error( |
| "`--python_top` is disabled by `--incompatible_use_python_toolchains`. Instead of " |
| + "configuring the Python runtime directly, register a Python toolchain. See " |
| + "https://github.com/bazelbuild/bazel/issues/7899. You can temporarily revert " |
| + "to the legacy flag-based way of specifying toolchains by setting " |
| + "`--incompatible_use_python_toolchains=false`.")); |
| } |
| // TODO(#7901): Also prohibit --python_path here. |
| } |
| } |
| |
| public Label getPythonTop() { |
| return options.pythonTop; |
| } |
| |
| public String getPythonPath() { |
| return options.pythonPath == null ? "python" : options.pythonPath; |
| } |
| |
| public boolean getImportAllRepositories() { |
| return options.experimentalPythonImportAllRepositories; |
| } |
| |
| } |