Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/Internals.java @ 450:03fd8d079e9c smartgit3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Share PhasesHelper instance among few HgChangesets (mostly affects HgChangesetTreeHandler case)
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 07 Jun 2012 17:06:23 +0200
parents 63c5a9d7ca3f
children bb278ccf9866
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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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19 import static org.tmatesoft.hg.internal.RequiresFile.*;
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20
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21 import java.io.File;
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22 import java.io.FileOutputStream;
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23 import java.io.IOException;
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24 import java.nio.charset.Charset;
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25 import java.util.ArrayList;
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26 import java.util.Arrays;
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27 import java.util.Collections;
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28 import java.util.Iterator;
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29 import java.util.LinkedHashSet;
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30 import java.util.List;
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31 import java.util.StringTokenizer;
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32
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33 import org.tmatesoft.hg.core.SessionContext;
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34 import org.tmatesoft.hg.repo.HgInternals;
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35 import org.tmatesoft.hg.repo.HgRepoConfig.ExtensionsSection;
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36 import org.tmatesoft.hg.repo.HgRepository;
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37 import org.tmatesoft.hg.util.PathRewrite;
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39 /**
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40 * Fields/members that shall not be visible
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41 *
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42 * @author Artem Tikhomirov
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43 * @author TMate Software Ltd.
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44 */
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45 public final class Internals {
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46
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47 /**
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48 * Allows to specify Mercurial installation directory to detect installation-wide configurations.
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49 * Without this property set, hg4j would attempt to deduce this value locating hg executable.
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50 */
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51 public static final String CFG_PROPERTY_HG_INSTALL_ROOT = "hg4j.hg.install_root";
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53 /**
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54 * Tells repository not to cache files/revlogs
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55 * XXX perhaps, need to respect this property not only for data files, but for manifest and changelog as well?
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56 * (@see HgRepository#getChangelog and #getManifest())
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57 */
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58 public static final String CFG_PROPERTY_REVLOG_STREAM_CACHE = "hg4j.repo.disable_revlog_cache";
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59
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60 /**
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61 * Name of charset to use when translating Unicode filenames to Mercurial storage paths, string,
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62 * to resolve with {@link Charset#forName(String)}.
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63 * E.g. <code>"cp1251"</code> or <code>"Latin-1"</code>.
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64 *
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65 * <p>Mercurial uses system encoding when mangling storage paths. Default value
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66 * based on 'file.encoding' Java system property is usually fine here, however
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67 * in certain scenarios it may be desirable to force a different one, and this
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68 * property is exactly for this purpose.
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69 *
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70 * <p>E.g. Eclipse defaults to project encoding (Launch config, Common page) when launching an application,
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71 * and if your project happen to use anything but filesystem default (say, UTF8 on cp1251 system),
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72 * native storage paths won't match
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73 */
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74 public static final String CFG_PROPERTY_FS_FILENAME_ENCODING = "hg.fs.filename.encoding";
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75
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76 private int requiresFlags = 0;
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77 private List<Filter.Factory> filterFactories;
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78 private final SessionContext sessionContext;
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79 private final boolean isCaseSensitiveFileSystem;
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80 private final boolean shallCacheRevlogsInRepo;
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81
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82 public Internals(SessionContext ctx) {
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83 this.sessionContext = ctx;
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84 isCaseSensitiveFileSystem = !runningOnWindows();
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85 Object p = ctx.getProperty(CFG_PROPERTY_REVLOG_STREAM_CACHE, true);
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86 shallCacheRevlogsInRepo = p instanceof Boolean ? ((Boolean) p).booleanValue() : Boolean.parseBoolean(String.valueOf(p));
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87 }
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89 public void parseRequires(HgRepository hgRepo, File requiresFile) {
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90 try {
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91 new RequiresFile().parse(this, requiresFile);
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92 } catch (IOException ex) {
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93 // FIXME not quite sure error reading requires file shall be silently logged only.
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94 HgInternals.getContext(hgRepo).getLog().error(getClass(), ex, null);
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95 }
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96 }
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98 public/*for tests, otherwise pkg*/ void setStorageConfig(int version, int flags) {
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99 requiresFlags = flags;
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100 }
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102 public PathRewrite buildNormalizePathRewrite() {
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103 if (runningOnWindows()) {
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104 return new WinToNixPathRewrite();
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105 } else {
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106 return new PathRewrite.Empty(); // or strip leading slash, perhaps?
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107 }
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108 }
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110 // XXX perhaps, should keep both fields right here, not in the HgRepository
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111 public PathRewrite buildDataFilesHelper() {
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112 // Note, tests in TestStorePath depend on the encoding not being cached
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113 Charset cs = getFileEncoding();
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114 // StoragePathHelper needs fine-grained control over char encoding, hence doesn't use EncodingHelper
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115 return new StoragePathHelper((requiresFlags & STORE) != 0, (requiresFlags & FNCACHE) != 0, (requiresFlags & DOTENCODE) != 0, cs);
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116 }
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117
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118 public PathRewrite buildRepositoryFilesHelper() {
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119 if ((requiresFlags & STORE) != 0) {
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120 return new PathRewrite() {
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121 public CharSequence rewrite(CharSequence path) {
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122 return "store/" + path;
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123 }
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124 };
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125 } else {
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126 return new PathRewrite.Empty();
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127 }
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128 }
114
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129
331
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130 public List<Filter.Factory> getFilters(HgRepository hgRepo) {
114
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131 if (filterFactories == null) {
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132 filterFactories = new ArrayList<Filter.Factory>();
331
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133 ExtensionsSection cfg = hgRepo.getConfiguration().getExtensions();
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134 if (cfg.isEnabled("eol")) {
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135 NewlineFilter.Factory ff = new NewlineFilter.Factory();
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136 ff.initialize(hgRepo);
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137 filterFactories.add(ff);
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138 }
331
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139 if (cfg.isEnabled("keyword")) {
114
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140 KeywordFilter.Factory ff = new KeywordFilter.Factory();
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141 ff.initialize(hgRepo);
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142 filterFactories.add(ff);
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143 }
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144 }
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145 return filterFactories;
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146 }
202
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147
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148 public void initEmptyRepository(File hgDir) throws IOException {
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149 hgDir.mkdir();
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150 FileOutputStream requiresFile = new FileOutputStream(new File(hgDir, "requires"));
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151 StringBuilder sb = new StringBuilder(40);
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152 sb.append("revlogv1\n");
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153 if ((requiresFlags & STORE) != 0) {
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154 sb.append("store\n");
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155 }
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156 if ((requiresFlags & FNCACHE) != 0) {
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157 sb.append("fncache\n");
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158 }
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159 if ((requiresFlags & DOTENCODE) != 0) {
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160 sb.append("dotencode\n");
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161 }
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162 requiresFile.write(sb.toString().getBytes());
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163 requiresFile.close();
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164 new File(hgDir, "store").mkdir(); // with that, hg verify says ok.
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165 }
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166
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167 public boolean isCaseSensitiveFileSystem() {
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168 return isCaseSensitiveFileSystem;
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169 }
412
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170
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171 public EncodingHelper buildFileNameEncodingHelper() {
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172 return new EncodingHelper(getFileEncoding());
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173 }
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174
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175 private Charset getFileEncoding() {
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176 Object altEncoding = sessionContext.getProperty(CFG_PROPERTY_FS_FILENAME_ENCODING, null);
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177 Charset cs;
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178 if (altEncoding == null) {
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179 cs = Charset.defaultCharset();
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180 } else {
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181 try {
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182 cs = Charset.forName(altEncoding.toString());
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183 } catch (IllegalArgumentException ex) {
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184 // both IllegalCharsetNameException and UnsupportedCharsetException are subclasses of IAE, too
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185 // not severe enough to throw an exception, imo. Just record the fact it's bad ad we ignore it
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186 sessionContext.getLog().error(Internals.class, ex, String.format("Bad configuration value for filename encoding %s", altEncoding));
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187 cs = Charset.defaultCharset();
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188 }
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189 }
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190 return cs;
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191 }
202
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192
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193 public static boolean runningOnWindows() {
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194 return System.getProperty("os.name").indexOf("Windows") != -1;
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195 }
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196
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197 /**
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198 * For Unix, returns installation root, which is the parent directory of the hg executable (or symlink) being run.
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199 * For Windows, it's Mercurial installation directory itself
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200 * @param ctx
379
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201 */
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202 private static File findHgInstallRoot(SessionContext ctx) {
379
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203 // let clients to override Hg install location
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204 String p = (String) ctx.getProperty(CFG_PROPERTY_HG_INSTALL_ROOT, null);
379
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205 if (p != null) {
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206 return new File(p);
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207 }
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208 StringTokenizer st = new StringTokenizer(System.getenv("PATH"), System.getProperty("path.separator"), false);
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209 final boolean runsOnWin = runningOnWindows();
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210 while (st.hasMoreTokens()) {
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211 String pe = st.nextToken();
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212 File execCandidate = new File(pe, runsOnWin ? "hg.exe" : "hg");
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213 if (execCandidate.exists() && execCandidate.isFile()) {
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214 File execDir = execCandidate.getParentFile();
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215 // e.g. on Unix runs "/shared/tools/bin/hg", directory of interest is "/shared/tools/"
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216 return runsOnWin ? execDir : execDir.getParentFile();
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217 }
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218 }
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219 return null;
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220 }
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221
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222 /**
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223 * @see http://www.selenic.com/mercurial/hgrc.5.html
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224 */
331
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225 public ConfigFile readConfiguration(HgRepository hgRepo, File repoRoot) throws IOException {
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226 ConfigFile configFile = new ConfigFile();
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227 File hgInstallRoot = findHgInstallRoot(HgInternals.getContext(hgRepo)); // may be null
379
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228 //
351
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229 if (runningOnWindows()) {
379
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230 if (hgInstallRoot != null) {
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231 for (File f : getWindowsConfigFilesPerInstall(hgInstallRoot)) {
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232 configFile.addLocation(f);
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233 }
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234 }
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235 LinkedHashSet<String> locations = new LinkedHashSet<String>();
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236 locations.add(System.getenv("USERPROFILE"));
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237 locations.add(System.getenv("HOME"));
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238 locations.remove(null);
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239 for (String loc : locations) {
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240 File location = new File(loc);
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241 configFile.addLocation(new File(location, "Mercurial.ini"));
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242 configFile.addLocation(new File(location, ".hgrc"));
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243 }
351
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244 } else {
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245 if (hgInstallRoot != null) {
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246 File d = new File(hgInstallRoot, "etc/mercurial/hgrc.d/");
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247 if (d.isDirectory() && d.canRead()) {
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248 for (File f : listConfigFiles(d)) {
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249 configFile.addLocation(f);
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250 }
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251 }
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252 configFile.addLocation(new File(hgInstallRoot, "etc/mercurial/hgrc"));
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253 }
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254 // same, but with absolute paths
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255 File d = new File("/etc/mercurial/hgrc.d/");
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256 if (d.isDirectory() && d.canRead()) {
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257 for (File f : listConfigFiles(d)) {
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258 configFile.addLocation(f);
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259 }
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260 }
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261 configFile.addLocation(new File("/etc/mercurial/hgrc"));
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262 configFile.addLocation(new File(System.getenv("HOME"), ".hgrc"));
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263 }
331
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264 // last one, overrides anything else
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265 // <repo>/.hg/hgrc
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266 configFile.addLocation(new File(repoRoot, "hgrc"));
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267 return configFile;
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268 }
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269
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270 private static List<File> getWindowsConfigFilesPerInstall(File hgInstallDir) {
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271 File f = new File(hgInstallDir, "Mercurial.ini");
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272 if (f.exists()) {
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273 return Collections.singletonList(f);
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274 }
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275 f = new File(hgInstallDir, "hgrc.d/");
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276 if (f.canRead() && f.isDirectory()) {
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277 return listConfigFiles(f);
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278 }
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279 // FIXME query registry, e.g. with
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280 // Runtime.exec("reg query HKLM\Software\Mercurial")
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281 //
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282 f = new File("C:\\Mercurial\\Mercurial.ini");
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283 if (f.exists()) {
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284 return Collections.singletonList(f);
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285 }
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286 return Collections.emptyList();
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287 }
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288
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289 private static List<File> listConfigFiles(File dir) {
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290 assert dir.canRead();
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291 assert dir.isDirectory();
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292 final File[] allFiles = dir.listFiles();
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293 // File is Comparable, lexicographically by default
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294 Arrays.sort(allFiles);
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295 ArrayList<File> rv = new ArrayList<File>(allFiles.length);
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296 for (File f : allFiles) {
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297 if (f.getName().endsWith(".rc")) {
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298 rv.add(f);
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299 }
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300 }
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301 return rv;
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302 }
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303
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304 public static File getInstallationConfigurationFileToWrite(SessionContext ctx) {
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305 File hgInstallRoot = findHgInstallRoot(ctx); // may be null
379
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306 // choice of which hgrc to pick here is according to my own pure discretion
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diff changeset
307 if (hgInstallRoot != null) {
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308 // use this location only if it's writable
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309 File cfg = new File(hgInstallRoot, runningOnWindows() ? "Mercurial.ini" : "etc/mercurial/hgrc");
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310 if (cfg.canWrite() || cfg.getParentFile().canWrite()) {
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311 return cfg;
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312 }
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313 }
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314 // fallback
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diff changeset
315 if (runningOnWindows()) {
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316 if (hgInstallRoot == null) {
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317 return new File("C:\\Mercurial\\Mercurial.ini");
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318 } else {
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319 // yes, we tried this file already (above) and found it non-writable
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320 // let caller fail with can't write
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321 return new File(hgInstallRoot, "Mercurial.ini");
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322 }
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323 } else {
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324 return new File("/etc/mercurial/hgrc");
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325 }
378
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diff changeset
326 }
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diff changeset
327
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diff changeset
328 public static File getUserConfigurationFileToWrite(SessionContext ctx) {
379
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329 LinkedHashSet<String> locations = new LinkedHashSet<String>();
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diff changeset
330 final boolean runsOnWindows = runningOnWindows();
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331 if (runsOnWindows) {
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332 locations.add(System.getenv("USERPROFILE"));
378
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diff changeset
333 }
379
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334 locations.add(System.getenv("HOME"));
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335 locations.remove(null);
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336 for (String loc : locations) {
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337 File location = new File(loc);
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338 File rv = new File(location, ".hgrc");
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339 if (rv.exists() && rv.canWrite()) {
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340 return rv;
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341 }
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diff changeset
342 if (runsOnWindows) {
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343 rv = new File(location, "Mercurial.ini");
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344 if (rv.exists() && rv.canWrite()) {
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345 return rv;
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346 }
378
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347 }
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348 }
379
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349 // fallback to default, let calling code fail with Exception if can't write
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350 return new File(System.getProperty("user.home"), ".hgrc");
378
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351 }
388
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352
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353 public boolean shallCacheRevlogs() {
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354 return shallCacheRevlogsInRepo;
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355 }
407
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356
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357 public static <T> CharSequence join(Iterable<T> col, CharSequence separator) {
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358 if (col == null) {
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359 return String.valueOf(col);
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360 }
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361 Iterator<T> it = col.iterator();
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362 if (!it.hasNext()) {
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363 return "[]";
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364 }
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365 String v = String.valueOf(it.next());
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366 StringBuilder sb = new StringBuilder(v);
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367 while (it.hasNext()) {
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368 sb.append(separator);
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369 v = String.valueOf(it.next());
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370 sb.append(v);
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371 }
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372 return sb;
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373 }
74
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374 }