tikhomirov@580: /*
tikhomirov@580:  * Copyright (c) 2013 TMate Software Ltd
tikhomirov@580:  *  
tikhomirov@580:  * This program is free software; you can redistribute it and/or modify
tikhomirov@580:  * it under the terms of the GNU General Public License as published by
tikhomirov@580:  * the Free Software Foundation; version 2 of the License.
tikhomirov@580:  *
tikhomirov@580:  * This program is distributed in the hope that it will be useful,
tikhomirov@580:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@580:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@580:  * GNU General Public License for more details.
tikhomirov@580:  *
tikhomirov@580:  * For information on how to redistribute this software under
tikhomirov@580:  * the terms of a license other than GNU General Public License
tikhomirov@580:  * contact TMate Software at support@hg4j.com
tikhomirov@580:  */
tikhomirov@580: package org.tmatesoft.hg.internal;
tikhomirov@580: 
tikhomirov@580: import static org.tmatesoft.hg.util.LogFacility.Severity.Warn;
tikhomirov@580: 
tikhomirov@580: import java.io.File;
tikhomirov@580: import java.io.IOException;
tikhomirov@580: import java.nio.ByteBuffer;
tikhomirov@580: import java.util.ArrayList;
tikhomirov@580: import java.util.Arrays;
tikhomirov@580: import java.util.Collections;
tikhomirov@580: import java.util.List;
tikhomirov@580: 
tikhomirov@580: import org.tmatesoft.hg.core.SessionContext;
tikhomirov@580: 
tikhomirov@580: /**
tikhomirov@580:  * TODO Merge with RegularFileStats
tikhomirov@580:  * 
tikhomirov@580:  * @author Artem Tikhomirov
tikhomirov@580:  * @author TMate Software Ltd.
tikhomirov@580:  */
tikhomirov@580: public class FileSystemHelper {
tikhomirov@580: 	
tikhomirov@580: 	private final SessionContext ctx;
tikhomirov@580: 	private final List<String> linkCmd, chmodCmd, statCmd;
tikhomirov@580: 	private final ProcessExecHelper execHelper;
tikhomirov@580: 
tikhomirov@580: 	public FileSystemHelper(SessionContext sessionContext) {
tikhomirov@580: 		ctx = sessionContext;
tikhomirov@580: 		if (Internals.runningOnWindows()) {
tikhomirov@580: 			linkCmd = Arrays.asList("mklink", "%1", "%2");
tikhomirov@580: 			chmodCmd = Collections.emptyList();
tikhomirov@580: 			statCmd = Collections.emptyList();
tikhomirov@580: 		} else {
tikhomirov@580: 			linkCmd = Arrays.asList("/bin/ln", "-s", "%2", "%1");
tikhomirov@580: 			chmodCmd = Arrays.asList("/bin/chmod", "+x", "%1");
tikhomirov@580: 			statCmd = Arrays.asList("stat", "--format=%a", "%1");
tikhomirov@580: 		}
tikhomirov@580: 		execHelper = new ProcessExecHelper();
tikhomirov@580: 	}
tikhomirov@580: 
tikhomirov@580: 	public void createSymlink(File parentDir, String linkName, byte[] target) throws IOException {
tikhomirov@580: 		ArrayList<String> command = new ArrayList<String>(linkCmd);
tikhomirov@580: 		command.set(command.indexOf("%1"), linkName);
tikhomirov@580: 		String targetFilename = Internals.getFileEncoding(ctx).decode(ByteBuffer.wrap(target)).toString();
tikhomirov@580: 		command.set(command.indexOf("%2"), targetFilename);
tikhomirov@580: 		execHelper.cwd(parentDir);
tikhomirov@580: 		try {
tikhomirov@580: 			execHelper.exec(command);
tikhomirov@580: 		} catch (InterruptedException ex) {
tikhomirov@580: 			throw new IOException(ex);
tikhomirov@580: 		}
tikhomirov@580: 	}
tikhomirov@580: 	
tikhomirov@580: 	public void setExecutableBit(File parentDir, String fname) throws IOException {
tikhomirov@580: 		if (chmodCmd.isEmpty()) {
tikhomirov@580: 			return;
tikhomirov@580: 		}
tikhomirov@580: 		ArrayList<String> command = new ArrayList<String>(chmodCmd);
tikhomirov@580: 		command.set(command.indexOf("%1"), fname);
tikhomirov@580: 		execHelper.cwd(parentDir);
tikhomirov@580: 		try {
tikhomirov@580: 			execHelper.exec(command);
tikhomirov@580: 		} catch (InterruptedException ex) {
tikhomirov@580: 			throw new IOException(ex);
tikhomirov@580: 		}
tikhomirov@580: 	}
tikhomirov@580: 
tikhomirov@580: 	public int getFileMode(File file, int defaultValue) throws IOException {
tikhomirov@580: 		if (statCmd.isEmpty()) {
tikhomirov@580: 			return defaultValue;
tikhomirov@580: 		}
tikhomirov@580: 		ArrayList<String> command = new ArrayList<String>(statCmd);
tikhomirov@580: 		command.set(command.indexOf("%1"), file.getAbsolutePath());
tikhomirov@580: 		String result = null;
tikhomirov@580: 		try {
tikhomirov@580: 			result = execHelper.exec(command).toString().trim();
tikhomirov@580: 			if (result.isEmpty()) {
tikhomirov@580: 				return defaultValue;
tikhomirov@580: 			}
tikhomirov@580: 			return Integer.parseInt(result, 8);
tikhomirov@580: 		} catch (InterruptedException ex) {
tikhomirov@580: 			throw new IOException(ex);
tikhomirov@580: 		} catch (NumberFormatException ex) {
tikhomirov@580: 			ctx.getLog().dump(getClass(), Warn, ex, String.format("Bad value for access rights:%s", result));
tikhomirov@580: 			return defaultValue;
tikhomirov@580: 		}
tikhomirov@580: 	}
tikhomirov@580: }