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// Copyright 2014 Google Inc. 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.analysis.RunfilesSupport;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
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 java.util.List;
/**
* An implementation for the {@code py_binary} rule.
*/
public abstract class PyBinary implements RuleConfiguredTargetFactory {
/**
* Create a {@link PythonSemantics} object that governs
* the behavior of this rule.
*/
protected abstract PythonSemantics createSemantics();
@Override
public ConfiguredTarget create(RuleContext ruleContext) {
PyCommon common = new PyCommon(ruleContext);
common.initCommon(common.getDefaultPythonVersion());
RuleConfiguredTargetBuilder builder = init(ruleContext, createSemantics(), common);
if (builder == null) {
return null;
}
return builder.build();
}
static RuleConfiguredTargetBuilder init(
RuleContext ruleContext, PythonSemantics semantics, PyCommon common) {
List<Artifact> srcs = common.validateSrcs();
CcLinkParamsStore ccLinkParamsStore = initializeCcLinkParamStore(ruleContext);
common.initBinary(srcs);
semantics.validate(ruleContext, common);
if (ruleContext.hasErrors()) {
return null;
}
semantics.createExecutable(ruleContext, common, ccLinkParamsStore);
Runfiles.Builder runfilesBuilder = collectCommonRunfiles(ruleContext, common);
semantics.collectRunfilesForBinary(ruleContext, runfilesBuilder, common);
Runfiles dataRunfiles = runfilesBuilder.build();
semantics.collectDefaultRunfilesForBinary(ruleContext, runfilesBuilder);
Runfiles defaultRunfiles = runfilesBuilder.build();
RunfilesSupport runfilesSupport = RunfilesSupport.withExecutable(ruleContext, defaultRunfiles,
common.getExecutable(), ruleContext.shouldCreateRunfilesSymlinks());
if (ruleContext.hasErrors()) {
return null;
}
RunfilesProvider runfilesProvider = RunfilesProvider.withData(defaultRunfiles, dataRunfiles);
RuleConfiguredTargetBuilder builder =
new RuleConfiguredTargetBuilder(ruleContext);
common.addCommonTransitiveInfoProviders(builder, semantics, common.getFilesToBuild());
semantics.postInitBinary(ruleContext, runfilesSupport, common);
return builder
.setFilesToBuild(common.getFilesToBuild())
.add(RunfilesProvider.class, runfilesProvider)
.setRunfilesSupport(runfilesSupport, common.getExecutable())
.add(CcLinkParamsProvider.class, new CcLinkParamsProvider(ccLinkParamsStore));
}
private static Runfiles.Builder collectCommonRunfiles(RuleContext ruleContext, PyCommon common) {
Runfiles.Builder builder = new Runfiles.Builder();
builder.addArtifact(common.getExecutable());
if (common.getConvertedFiles() != null) {
builder.addSymlinks(common.getConvertedFiles());
} else {
builder.addTransitiveArtifacts(common.getFilesToBuild());
}
builder.addRunfiles(ruleContext, RunfilesProvider.DEFAULT_RUNFILES);
builder.add(ruleContext, PythonRunfilesProvider.TO_RUNFILES);
builder.setEmptyFilesSupplier(PythonUtils.GET_INIT_PY_FILES);
return builder;
}
private static CcLinkParamsStore initializeCcLinkParamStore(final RuleContext ruleContext) {
return new CcLinkParamsStore() {
@Override
protected void collect(CcLinkParams.Builder builder, boolean linkingStatically,
boolean linkShared) {
Iterable<? extends TransitiveInfoCollection> deps =
ruleContext.getPrerequisites("deps", Mode.TARGET);
builder.addTransitiveTargets(deps);
builder.addTransitiveLangTargets(deps, PyCcLinkParamsProvider.TO_LINK_PARAMS);
}
};
}
}
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