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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.cpp;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.AbstractAction;
import com.google.devtools.build.lib.actions.ActionExecutionContext;
import com.google.devtools.build.lib.actions.ActionExecutionException;
import com.google.devtools.build.lib.actions.ActionOwner;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.actions.Executor;
import com.google.devtools.build.lib.actions.ResourceSet;
import java.io.IOException;
/**
* An action which greps for includes over a given .cc or .h file.
* This is a part of the work required for C++ include scanning.
*
* <p>Note that this may run grep-includes over-optimistically, where we previously
* had not. For example, consider a cc_library of generated headers. If another
* library depends on it, and only references one of the headers, the other
* grep-includes will have been wasted.
*/
final class ExtractInclusionAction extends AbstractAction {
private static final String GUID = "45b43e5a-4734-43bb-a05e-012313808142";
/**
* Constructs a new action.
*/
public ExtractInclusionAction(ActionOwner owner, Artifact input, Artifact output) {
super(owner, ImmutableList.of(input), ImmutableList.of(output));
}
@Override
protected String computeKey() {
return GUID;
}
@Override
public String describeStrategy(Executor executor) {
return executor.getContext(CppCompileActionContext.class).strategyLocality();
}
@Override
public String getMnemonic() {
return "GrepIncludes";
}
@Override
protected String getRawProgressMessage() {
return "Extracting include lines from " + getPrimaryInput().prettyPrint();
}
@Override
public ResourceSet estimateResourceConsumption(Executor executor) {
return ResourceSet.ZERO;
}
@Override
public void execute(ActionExecutionContext actionExecutionContext)
throws ActionExecutionException, InterruptedException {
Executor executor = actionExecutionContext.getExecutor();
IncludeScanningContext context = executor.getContext(IncludeScanningContext.class);
try {
context.extractIncludes(actionExecutionContext, this, getPrimaryInput(),
getPrimaryOutput());
} catch (IOException e) {
throw new ActionExecutionException(e, this, false);
}
}
}
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