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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.analysis.actions;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.io.ByteSource;
import com.google.common.io.ByteStreams;
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.events.EventHandler;
import com.google.devtools.build.lib.util.Fingerprint;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Action to write a binary file.
*/
public final class BinaryFileWriteAction extends AbstractFileWriteAction {
private static final String GUID = "eeee07fe-4b40-11e4-82d6-eba0b4f713e2";
private final ByteSource source;
/**
* Creates a new BinaryFileWriteAction instance without inputs.
*
* @param owner the action owner.
* @param output the Artifact that will be created by executing this Action.
* @param source a source of bytes that will be written to the file.
* @param makeExecutable iff true will change the output file to be executable.
*/
public BinaryFileWriteAction(
ActionOwner owner, Artifact output, ByteSource source, boolean makeExecutable) {
super(owner, /*inputs=*/Artifact.NO_ARTIFACTS, output, makeExecutable);
this.source = Preconditions.checkNotNull(source);
}
@VisibleForTesting
public ByteSource getSource() {
return source;
}
@Override
public DeterministicWriter newDeterministicWriter(EventHandler eventHandler, Executor executor) {
return new DeterministicWriter() {
@Override
public void writeOutputFile(OutputStream out) throws IOException {
try (InputStream in = source.openStream()) {
ByteStreams.copy(in, out);
}
out.flush();
}
};
}
@Override
protected String computeKey() {
Fingerprint f = new Fingerprint();
f.addString(GUID);
f.addString(String.valueOf(makeExecutable));
try (InputStream in = source.openStream()) {
byte[] buffer = new byte[512];
int amountRead;
while ((amountRead = in.read(buffer)) != -1) {
f.addBytes(buffer, 0, amountRead);
}
} catch (IOException e) {
throw new RuntimeException(e);
}
return f.hexDigestAndReset();
}
}
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