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// Copyright (C) 2010 The Android Open Source Project
//
// 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.gerrit.proto;
import static com.google.common.base.Preconditions.checkState;
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gwtorm.schema.java.JavaSchemaModel;
import java.io.BufferedWriter;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.nio.ByteBuffer;
import org.eclipse.jgit.internal.storage.file.LockFile;
import org.eclipse.jgit.util.IO;
import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.CmdLineParser;
import org.kohsuke.args4j.Option;
import org.kohsuke.args4j.ParserProperties;
public class ProtoGen {
@Option(
name = "--output",
aliases = {"-o"},
required = true,
metaVar = "FILE",
usage = "File to write .proto into")
private File file;
public static void main(String[] argv) throws Exception {
System.exit(new ProtoGen().run(argv));
}
private int run(String[] argv) throws Exception {
CmdLineParser parser = new CmdLineParser(this, ParserProperties.defaults().withAtSyntax(false));
try {
parser.parseArgument(argv);
} catch (CmdLineException e) {
System.err.println(e.getMessage());
System.err.println(getClass().getSimpleName() + " -o output.proto");
parser.printUsage(System.err);
return 1;
}
LockFile lock = new LockFile(file.getAbsoluteFile());
checkState(lock.lock(), "cannot lock %s", file);
try {
JavaSchemaModel jsm = new JavaSchemaModel(ReviewDb.class);
try (OutputStream o = lock.getOutputStream();
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(o, UTF_8)))) {
String header;
try (InputStream in = getClass().getResourceAsStream("ProtoGenHeader.txt")) {
ByteBuffer buf = IO.readWholeStream(in, 1024);
int ptr = buf.arrayOffset() + buf.position();
int len = buf.remaining();
header = new String(buf.array(), ptr, len, UTF_8);
}
out.write(header);
jsm.generateProto(out);
out.flush();
}
checkState(lock.commit(), "Could not write to %s", file);
} finally {
lock.unlock();
}
return 0;
}
}
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