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1   /*
2    * Copyright (C) 2009, Google Inc.
3    * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
4    * and other copyright owners as documented in the project's IP log.
5    *
6    * This program and the accompanying materials are made available
7    * under the terms of the Eclipse Distribution License v1.0 which
8    * accompanies this distribution, is reproduced below, and is
9    * available at http://www.eclipse.org/org/documents/edl-v10.php
10   *
11   * All rights reserved.
12   *
13   * Redistribution and use in source and binary forms, with or
14   * without modification, are permitted provided that the following
15   * conditions are met:
16   *
17   * - Redistributions of source code must retain the above copyright
18   *   notice, this list of conditions and the following disclaimer.
19   *
20   * - Redistributions in binary form must reproduce the above
21   *   copyright notice, this list of conditions and the following
22   *   disclaimer in the documentation and/or other materials provided
23   *   with the distribution.
24   *
25   * - Neither the name of the Eclipse Foundation, Inc. nor the
26   *   names of its contributors may be used to endorse or promote
27   *   products derived from this software without specific prior
28   *   written permission.
29   *
30   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
31   * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
32   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
33   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
35   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
37   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
38   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
39   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
42   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43   */
44  
45  package org.eclipse.jgit.util;
46  
47  import java.io.File;
48  import java.io.IOException;
49  import java.nio.charset.Charset;
50  import java.nio.file.FileVisitOption;
51  import java.nio.file.FileVisitResult;
52  import java.nio.file.Files;
53  import java.nio.file.Path;
54  import java.nio.file.SimpleFileVisitor;
55  import java.nio.file.attribute.BasicFileAttributes;
56  import java.util.ArrayList;
57  import java.util.Arrays;
58  import java.util.EnumSet;
59  import java.util.List;
60  
61  import org.eclipse.jgit.errors.CommandFailedException;
62  import org.eclipse.jgit.treewalk.FileTreeIterator.FileEntry;
63  import org.eclipse.jgit.treewalk.FileTreeIterator.FileModeStrategy;
64  import org.eclipse.jgit.treewalk.WorkingTreeIterator.Entry;
65  import org.slf4j.Logger;
66  import org.slf4j.LoggerFactory;
67  
68  
69  /**
70   * FS implementation for Windows
71   *
72   * @since 3.0
73   */
74  public class FS_Win32 extends FS {
75  	private final static Logger LOG = LoggerFactory.getLogger(FS_Win32.class);
76  
77  	/**
78  	 * Constructor
79  	 */
80  	public FS_Win32() {
81  		super();
82  	}
83  
84  	/**
85  	 * Constructor
86  	 *
87  	 * @param src
88  	 *            instance whose attributes to copy
89  	 */
90  	protected FS_Win32(FS src) {
91  		super(src);
92  	}
93  
94  	/** {@inheritDoc} */
95  	@Override
96  	public FS newInstance() {
97  		return new FS_Win32(this);
98  	}
99  
100 	/** {@inheritDoc} */
101 	@Override
102 	public boolean supportsExecute() {
103 		return false;
104 	}
105 
106 	/** {@inheritDoc} */
107 	@Override
108 	public boolean canExecute(File f) {
109 		return false;
110 	}
111 
112 	/** {@inheritDoc} */
113 	@Override
114 	public boolean setExecute(File f, boolean canExec) {
115 		return false;
116 	}
117 
118 	/** {@inheritDoc} */
119 	@Override
120 	public boolean isCaseSensitive() {
121 		return false;
122 	}
123 
124 	/** {@inheritDoc} */
125 	@Override
126 	public boolean retryFailedLockFileCommit() {
127 		return true;
128 	}
129 
130 	/** {@inheritDoc} */
131 	@Override
132 	public Entry[] list(File directory, FileModeStrategy fileModeStrategy) {
133 		List<Entry> result = new ArrayList<>();
134 		FS fs = this;
135 		boolean checkExecutable = fs.supportsExecute();
136 		try {
137 			Files.walkFileTree(directory.toPath(),
138 					EnumSet.noneOf(FileVisitOption.class), 1,
139 					new SimpleFileVisitor<Path>() {
140 						@Override
141 						public FileVisitResult visitFile(Path file,
142 								BasicFileAttributes attrs) throws IOException {
143 							File f = file.toFile();
144 							FS.Attributes attributes = new FS.Attributes(fs, f,
145 									true, attrs.isDirectory(),
146 									checkExecutable && f.canExecute(),
147 									attrs.isSymbolicLink(),
148 									attrs.isRegularFile(),
149 									attrs.creationTime().toMillis(),
150 									attrs.lastModifiedTime().toInstant(),
151 									attrs.size());
152 							result.add(new FileEntry(f, fs, attributes,
153 									fileModeStrategy));
154 							return FileVisitResult.CONTINUE;
155 						}
156 
157 						@Override
158 						public FileVisitResult visitFileFailed(Path file,
159 								IOException exc) throws IOException {
160 							// Just ignore it
161 							return FileVisitResult.CONTINUE;
162 						}
163 					});
164 		} catch (IOException e) {
165 			// Ignore
166 		}
167 		if (result.isEmpty()) {
168 			return NO_ENTRIES;
169 		}
170 		return result.toArray(new Entry[0]);
171 	}
172 
173 	/** {@inheritDoc} */
174 	@Override
175 	protected File discoverGitExe() {
176 		String path = SystemReader.getInstance().getenv("PATH"); //$NON-NLS-1$
177 		File gitExe = searchPath(path, "git.exe", "git.cmd"); //$NON-NLS-1$ //$NON-NLS-2$
178 
179 		if (gitExe == null) {
180 			if (searchPath(path, "bash.exe") != null) { //$NON-NLS-1$
181 				// This isn't likely to work, but its worth trying:
182 				// If bash is in $PATH, git should also be in $PATH.
183 				String w;
184 				try {
185 					w = readPipe(userHome(),
186 						new String[]{"bash", "--login", "-c", "which git"}, // //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
187 						Charset.defaultCharset().name());
188 				} catch (CommandFailedException e) {
189 					LOG.warn(e.getMessage());
190 					return null;
191 				}
192 				if (!StringUtils.isEmptyOrNull(w)) {
193 					// The path may be in cygwin/msys notation so resolve it right away
194 					gitExe = resolve(null, w);
195 				}
196 			}
197 		}
198 
199 		return gitExe;
200 	}
201 
202 	/** {@inheritDoc} */
203 	@Override
204 	protected File userHomeImpl() {
205 		String home = SystemReader.getInstance().getenv("HOME"); //$NON-NLS-1$
206 		if (home != null) {
207 			return resolve(null, home);
208 		}
209 		String homeDrive = SystemReader.getInstance().getenv("HOMEDRIVE"); //$NON-NLS-1$
210 		if (homeDrive != null) {
211 			String homePath = SystemReader.getInstance().getenv("HOMEPATH"); //$NON-NLS-1$
212 			if (homePath != null) {
213 				return new File(homeDrive, homePath);
214 			}
215 		}
216 
217 		String homeShare = SystemReader.getInstance().getenv("HOMESHARE"); //$NON-NLS-1$
218 		if (homeShare != null) {
219 			return new File(homeShare);
220 		}
221 
222 		return super.userHomeImpl();
223 	}
224 
225 	/** {@inheritDoc} */
226 	@Override
227 	public ProcessBuilder runInShell(String cmd, String[] args) {
228 		List<String> argv = new ArrayList<>(3 + args.length);
229 		argv.add("cmd.exe"); //$NON-NLS-1$
230 		argv.add("/c"); //$NON-NLS-1$
231 		argv.add(cmd);
232 		argv.addAll(Arrays.asList(args));
233 		ProcessBuilder proc = new ProcessBuilder();
234 		proc.command(argv);
235 		return proc;
236 	}
237 
238 	/** {@inheritDoc} */
239 	@Override
240 	public Attributes getAttributes(File path) {
241 		return FileUtils.getFileAttributesBasic(this, path);
242 	}
243 }