annotate src/org/tmatesoft/hg/internal/FileUtils.java @ 713:661e77dc88ba tip

Mac support: respect Mac alternatives of command-line arguments for common unix tools
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sun, 03 Aug 2014 18:09:00 +0200
parents 42b88709e41d
children
rev   line source
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1 /*
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2 * Copyright (c) 2013 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import static org.tmatesoft.hg.util.LogFacility.Severity.Debug;
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20
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21 import java.io.Closeable;
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22 import java.io.File;
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23 import java.io.FileInputStream;
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24 import java.io.FileOutputStream;
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25 import java.io.IOException;
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26 import java.io.InputStream;
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27 import java.nio.channels.FileChannel;
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28 import java.util.Arrays;
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29 import java.util.LinkedList;
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30 import java.util.List;
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31
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32 import org.tmatesoft.hg.core.HgIOException;
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33 import org.tmatesoft.hg.util.LogFacility;
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34 import org.tmatesoft.hg.util.LogFacility.Severity;
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35
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36 /**
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37 *
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38 * @author Artem Tikhomirov
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39 * @author TMate Software Ltd.
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40 */
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41 public final class FileUtils {
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42
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43 private final LogFacility log;
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44 private final Class<?> troublemaker;
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45
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46 public static void copyFile(File from, File to) throws HgIOException {
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47 new FileUtils(new StreamLogFacility(Debug, true, System.err), FileUtils.class).copy(from, to);
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48 }
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49
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50 public FileUtils(LogFacility logFacility, Object troubleSource) {
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51 log = logFacility;
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52 if (troubleSource == null) {
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53 troublemaker = null;
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54 } else {
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55 troublemaker = troubleSource instanceof Class ? (Class<?>) troubleSource : troubleSource.getClass();
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56 }
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57 }
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58
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59 public void copy(File from, File to) throws HgIOException {
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60 FileInputStream fis = null;
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61 FileOutputStream fos = null;
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62 try {
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63 fis = new FileInputStream(from);
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64 fos = new FileOutputStream(to);
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65 FileChannel input = fis.getChannel();
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66 FileChannel output = fos.getChannel();
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67 long count = input.size();
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68 long pos = 0;
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69 int zeroCopied = 0; // flag to prevent hang-up
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70 do {
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71 long c = input.transferTo(pos, count, output);
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72 pos += c;
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73 count -= c;
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74 if (c == 0) {
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75 if (++zeroCopied == 3) {
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76 String m = String.format("Can't copy %s to %s, transferTo copies 0 bytes. Position: %d, bytes left:%d", from.getName(), to.getName(), pos, count);
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77 throw new IOException(m);
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78 }
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79 } else {
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80 // reset
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81 zeroCopied = 0;
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82 }
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83 } while (count > 0);
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84 fos.close();
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85 fos = null;
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86 fis.close();
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87 fis = null;
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88 } catch (IOException ex) {
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89 // not in finally because I don't want to loose exception from fos.close()
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90 closeQuietly(fis, from);
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91 closeQuietly(fos, to);
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92 String m = String.format("Failed to copy %s to %s", from.getName(), to.getName());
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93 throw new HgIOException(m, ex, from);
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94 }
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95 /* Copy of cpython's 00changelog.d, 20Mb+
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96 * Linux&Windows: 300-400 ms,
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97 * Windows uncached run: 1.6 seconds
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98 */
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99 }
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100
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101 public void write(InputStream is, File file) throws IOException {
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102 FileOutputStream fos = new FileOutputStream(file);
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103 int r;
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104 byte[] buf = new byte[8*1024];
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105 while ((r = is.read(buf)) != -1) {
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106 fos.write(buf, 0, r);
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107 }
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108 fos.flush();
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109 fos.close();
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110 }
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111
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112 public void closeQuietly(Closeable stream) {
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113 closeQuietly(stream, null);
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114 }
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115
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116 public void closeQuietly(Closeable stream, File f) {
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117 if (stream != null) {
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118 try {
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119 stream.close();
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120 } catch (IOException ex) {
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121 // ignore
636
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122 final String msg;
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123 if (f == null) {
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124 msg = "Exception while closing stream quietly";
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125 } else {
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126 msg = String.format("Failed to close %s", f);
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127 }
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128 log.dump(troublemaker == null ? getClass() : troublemaker, Severity.Warn, ex, msg);
617
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129 }
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130 }
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131 }
705
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132
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133 // nothing special, just a single place with common prefix
707
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134 public static File createTempFile() throws IOException {
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135 return File.createTempFile("hg4j-", null);
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136 }
707
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137
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138 public static void rmdir(File dest) throws IOException {
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139 if (!dest.isDirectory()) {
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140 return;
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141 }
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142 LinkedList<File> queue = new LinkedList<File>();
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143 queue.addAll(Arrays.asList(dest.listFiles()));
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144 while (!queue.isEmpty()) {
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145 File next = queue.removeFirst();
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146 if (next.isDirectory()) {
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147 List<File> files = Arrays.asList(next.listFiles());
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148 if (!files.isEmpty()) {
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149 queue.addAll(files);
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150 queue.add(next);
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151 }
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152 // fall through
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153 }
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154 next.delete();
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155 }
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156 dest.delete();
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157 }
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158
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159 }