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// 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.actions.Artifact;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.Runfiles;
import com.google.devtools.build.lib.analysis.RunfilesProvider;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.collect.nestedset.Order;
import com.google.devtools.build.lib.rules.RuleConfiguredTargetFactory;
import com.google.devtools.build.lib.rules.cpp.CcLinkParams;
import com.google.devtools.build.lib.rules.cpp.CcLinkParamsProvider;
import com.google.devtools.build.lib.rules.cpp.CcLinkParamsStore;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.ArrayList;
import java.util.List;
/**
* An implementation for the {@code py_library} rule.
*/
public abstract class PyLibrary implements RuleConfiguredTargetFactory {
/**
* Create a {@link PythonSemantics} object that governs
* the behavior of this rule.
*/
protected abstract PythonSemantics createSemantics();
@Override
public ConfiguredTarget create(final RuleContext ruleContext) {
PythonSemantics semantics = createSemantics();
PyCommon common = new PyCommon(ruleContext);
common.initCommon(common.getDefaultPythonVersion());
common.validatePackageName();
semantics.validate(ruleContext, common);
List<Artifact> srcs = common.validateSrcs();
List<Artifact> allOutputs =
new ArrayList<>(semantics.precompiledPythonFiles(ruleContext, srcs, common));
NestedSet<Artifact> filesToBuild =
NestedSetBuilder.wrap(Order.STABLE_ORDER, allOutputs);
common.addPyExtraActionPseudoAction();
CcLinkParamsStore ccLinkParamsStore = new CcLinkParamsStore() {
@Override
protected void collect(CcLinkParams.Builder builder, boolean linkingStatically,
boolean linkShared) {
builder.addTransitiveTargets(ruleContext.getPrerequisites("deps", Mode.TARGET),
PyCcLinkParamsProvider.TO_LINK_PARAMS,
CcLinkParamsProvider.TO_LINK_PARAMS);
}
};
NestedSet<PathFragment> imports = common.collectImports(ruleContext, semantics);
if (ruleContext.hasErrors()) {
return null;
}
Runfiles.Builder runfilesBuilder = new Runfiles.Builder(ruleContext.getWorkspaceName());
if (common.getConvertedFiles() != null) {
runfilesBuilder.addSymlinks(common.getConvertedFiles());
} else {
runfilesBuilder.addTransitiveArtifacts(filesToBuild);
}
runfilesBuilder.setEmptyFilesSupplier(PythonUtils.GET_INIT_PY_FILES);
runfilesBuilder.add(ruleContext, PythonRunfilesProvider.TO_RUNFILES);
runfilesBuilder.addRunfiles(ruleContext, RunfilesProvider.DEFAULT_RUNFILES);
RuleConfiguredTargetBuilder builder = new RuleConfiguredTargetBuilder(ruleContext);
common.addCommonTransitiveInfoProviders(builder, semantics, filesToBuild);
return builder
.setFilesToBuild(filesToBuild)
.add(RunfilesProvider.class, RunfilesProvider.simple(runfilesBuilder.build()))
.add(CcLinkParamsProvider.class, new CcLinkParamsProvider(ccLinkParamsStore))
.add(PythonImportsProvider.class, new PythonImportsProvider(imports))
.build();
}
}
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