org.sonar.javascript.checks.MissingNewlineAtEndOfFileCheck Maven / Gradle / Ivy
/*
* SonarQube JavaScript Plugin
* Copyright (C) 2011 SonarSource and Eriks Nukis
* [email protected]
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
*/
package org.sonar.javascript.checks;
import com.google.common.io.Closeables;
import com.sonar.sslr.api.AstNode;
import com.sonar.sslr.squid.checks.SquidCheck;
import org.sonar.api.utils.SonarException;
import org.sonar.check.Priority;
import org.sonar.check.Rule;
import org.sonar.sslr.parser.LexerlessGrammar;
import java.io.IOException;
import java.io.RandomAccessFile;
@Rule(
key = "MissingNewlineAtEndOfFile",
priority = Priority.MINOR)
public class MissingNewlineAtEndOfFileCheck extends SquidCheck {
@Override
public void visitFile(AstNode astNode) {
RandomAccessFile randomAccessFile = null;
try {
randomAccessFile = new RandomAccessFile(getContext().getFile(), "r");
if (!endsWithNewline(randomAccessFile)) {
getContext().createFileViolation(this, "Add a new line at the end of this file.");
}
} catch (IOException e) {
throw new SonarException(e);
} finally {
Closeables.closeQuietly(randomAccessFile);
}
}
private boolean endsWithNewline(RandomAccessFile randomAccessFile) throws IOException {
if (randomAccessFile.length() < 1) {
return false;
}
randomAccessFile.seek(randomAccessFile.length() - 1);
byte[] chars = new byte[1];
if (randomAccessFile.read(chars) < 1) {
return false;
}
String ch = new String(chars);
return "\n".equals(ch) || "\r".equals(ch);
}
}