org.apache.hadoop.hive.ql.util.DosToUnix Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hive.ql.util;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStreamReader;
public class DosToUnix {
public static String convertWindowsScriptToUnix(File windowsScriptFile) throws Exception {
String windowsScriptFilename = windowsScriptFile.getName();
String unixScriptFilename = getUnixScriptNameFor(windowsScriptFilename);
File unixScriptFile = null;
if (windowsScriptFile.getParent() != null) {
unixScriptFile = new File(windowsScriptFile.getParent() + "/" + unixScriptFilename);
} else {
unixScriptFile = new File(unixScriptFilename);
}
BufferedWriter writer = new BufferedWriter(new FileWriter(unixScriptFile));
try {
BufferedReader reader = new BufferedReader(new FileReader(windowsScriptFile));
try {
int prev = reader.read();
int next = reader.read();
while( prev != -1 ) {
if ( prev != -1 && ( prev != '\r' || next != '\n' ) ) {
writer.write(prev);
}
prev = next;
next = reader.read();
}
}
finally {
reader.close();
}
}
finally {
writer.close();
}
unixScriptFile.setExecutable(true);
return unixScriptFile.getAbsolutePath();
}
public static String getUnixScriptNameFor(String windowsScriptFilename) {
int pos = windowsScriptFilename.indexOf(".");
String unixScriptFilename;
if ( pos >= 0 ) {
unixScriptFilename = windowsScriptFilename.substring(0, pos) + "_unix" + windowsScriptFilename.substring(pos);
}
else {
unixScriptFilename = windowsScriptFilename + "_unix";
}
return unixScriptFilename;
}
public static boolean isWindowsScript(File file) {
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
char[] buffer = new char[4096];
int readLength = reader.read(buffer);
if (readLength >= 2 && buffer[0] == '#' && buffer[1] == '!') {
for(int i=2; i