annotate src/org/tmatesoft/hg/repo/HgManifest.java @ 539:9edfd5a223b8

Commit: handle empty repository case
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 13 Feb 2013 18:44:58 +0100
parents 5a455624be4f
children 66fc86e8c0dd
rev   line source
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1 /*
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2 * Copyright (c) 2010-2013 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.repo;
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18
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19 import static org.tmatesoft.hg.core.Nodeid.NULL;
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20 import static org.tmatesoft.hg.repo.HgRepository.*;
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21 import static org.tmatesoft.hg.util.LogFacility.Severity.Info;
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22
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23 import java.io.ByteArrayOutputStream;
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24 import java.io.IOException;
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25 import java.util.ArrayList;
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26 import java.util.Arrays;
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27
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ccd7d25e5aea New and better name for HgFileInformer - HgChangesetFileSneaker. Explain (comments) ties between HgManifest, HgDataFile, HgChangesetFileSneaker and reasons for method placement
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28 import org.tmatesoft.hg.core.HgChangesetFileSneaker;
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29 import org.tmatesoft.hg.core.Nodeid;
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30 import org.tmatesoft.hg.internal.Callback;
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31 import org.tmatesoft.hg.internal.DataAccess;
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32 import org.tmatesoft.hg.internal.DigestHelper;
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33 import org.tmatesoft.hg.internal.EncodingHelper;
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34 import org.tmatesoft.hg.internal.IntMap;
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35 import org.tmatesoft.hg.internal.IterateControlMediator;
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36 import org.tmatesoft.hg.internal.Lifecycle;
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37 import org.tmatesoft.hg.internal.IdentityPool;
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38 import org.tmatesoft.hg.internal.RevlogStream;
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39 import org.tmatesoft.hg.util.CancelSupport;
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40 import org.tmatesoft.hg.util.Path;
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41 import org.tmatesoft.hg.util.ProgressSupport;
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42 import org.tmatesoft.hg.util.LogFacility.Severity;
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43
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44
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45 /**
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46 * Representation of Mercurial manifest file (list of file names and their revisions in a particular changeset)
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47 *
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48 * @see http://mercurial.selenic.com/wiki/Manifest
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49 * @author Artem Tikhomirov
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50 * @author TMate Software Ltd.
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51 */
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52 public final class HgManifest extends Revlog {
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53 private RevisionMapper revisionMap;
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54 private EncodingHelper encodingHelper;
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55
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56 /**
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57 * File flags recorded in manifest
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58 */
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59 public enum Flags {
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60 /**
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61 * Executable bit set
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62 */
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63 Exec,
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64 /**
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65 * Symbolic link
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66 */
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67 Link,
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68 /**
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69 * Regular file
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70 */
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71 RegularFile;
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72
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73 static Flags parse(String flags) {
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74 if ("x".equalsIgnoreCase(flags)) {
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75 return Exec;
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76 }
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77 if ("l".equalsIgnoreCase(flags)) {
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78 return Link;
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79 }
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80 if (flags == null) {
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81 return RegularFile;
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82 }
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83 throw new IllegalStateException(flags);
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84 }
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85
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86 static Flags parse(byte[] data, int start, int length) {
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87 if (length == 0) {
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88 return RegularFile;
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89 }
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90 if (length == 1) {
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91 if (data[start] == 'x') {
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92 return Exec;
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93 }
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94 if (data[start] == 'l') {
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95 return Link;
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96 }
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97 // FALL THROUGH
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98 }
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99 throw new IllegalStateException(new String(data, start, length));
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100 }
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101
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102 String nativeString() {
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103 if (this == Exec) {
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104 return "x";
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105 }
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106 if (this == Link) {
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107 return "l";
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108 }
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109 if (this == RegularFile) {
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110 return "";
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111 }
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112 throw new IllegalStateException(toString());
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113 }
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114 }
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115
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116 /*package-local*/ HgManifest(HgRepository hgRepo, RevlogStream content, EncodingHelper eh) {
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117 super(hgRepo, content);
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118 encodingHelper = eh;
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119 }
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120
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121 /**
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122 * Walks manifest revisions that correspond to specified range of changesets. The order in which manifest versions get reported
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123 * to the inspector corresponds to physical order of manifest revisions, not that of changesets (with few exceptions as noted below).
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124 * That is, for cset-manifest revision pairs:
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125 * <pre>
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126 * 3 8
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127 * 4 7
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128 * 5 9
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129 * </pre>
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130 * call <code>walk(3,5, insp)</code> would yield (4,7), (3,8) and (5,9) to the inspector;
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131 * different order of arguments, <code>walk(5, 3, insp)</code>, makes no difference.
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132 *
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133 * <p>Physical layout of mercurial files (revlog) doesn't impose any restriction on whether manifest and changeset revisions shall go
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134 * incrementally, nor it mandates presence of manifest version for a changeset. Thus, there might be changesets that record {@link Nodeid#NULL}
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135 * as corresponding manifest revision. This situation is deemed exceptional now and what would <code>inspector</code> get depends on whether
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136 * <code>start</code> or <code>end</code> arguments point to such changeset, or such changeset happen to be somewhere inside the range
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137 * <code>[start..end]</code>. Implementation does it best to report empty manifests
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138 * (<code>Inspector.begin(HgRepository.NO_REVISION, NULL, csetRevIndex);</code>
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139 * followed immediately by <code>Inspector.end(HgRepository.NO_REVISION)</code>
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140 * when <code>start</code> and/or <code>end</code> point to changeset with no associated
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141 * manifest revision. However, if changeset-manifest revision pairs look like:
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142 * <pre>
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143 * 3 8
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144 * 4 -1 (cset records null revision for manifest)
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145 * 5 9
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146 * </pre>
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147 * call <code>walk(3,5, insp)</code> would yield only (3,8) and (5,9) to the inspector, without additional empty
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148 * <code>Inspector.begin(); Inspector.end()</code> call pair.
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149 *
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150 * @see HgRepository#NO_REVISION
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151 * @param start changelog (not manifest!) revision to begin with
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152 * @param end changelog (not manifest!) revision to stop, inclusive.
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153 * @param inspector manifest revision visitor, can't be <code>null</code>
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154 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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155 * @throws IllegalArgumentException if inspector callback is <code>null</code>
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156 */
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157 public void walk(int start, int end, final Inspector inspector) throws HgRuntimeException, IllegalArgumentException {
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158 if (inspector == null) {
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159 throw new IllegalArgumentException();
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160 }
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161 final int csetFirst = start <= end ? start : end, csetLast = start > end ? start : end;
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162 int manifestFirst, manifestLast, i = 0;
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163 do {
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164 manifestFirst = fromChangelog(csetFirst+i);
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165 if (manifestFirst == BAD_REVISION) {
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166 inspector.begin(NO_REVISION, NULL, csetFirst+i);
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167 inspector.end(NO_REVISION);
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168 }
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169 i++;
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170 } while (manifestFirst == BAD_REVISION && csetFirst+i <= csetLast);
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171 if (manifestFirst == BAD_REVISION) {
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172 getRepo().getSessionContext().getLog().dump(getClass(), Info, "None of changesets [%d..%d] have associated manifest revision", csetFirst, csetLast);
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173 // we ran through all revisions in [start..end] and none of them had manifest.
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174 // we reported that to inspector and proceeding is done now.
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175 return;
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176 }
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177 i = 0;
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178 do {
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179 manifestLast = fromChangelog(csetLast-i);
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180 if (manifestLast == BAD_REVISION) {
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181 inspector.begin(NO_REVISION, NULL, csetLast-i);
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182 inspector.end(NO_REVISION);
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183 }
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184 i++;
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185 } while (manifestLast == BAD_REVISION && csetLast-i >= csetFirst);
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186 if (manifestLast == BAD_REVISION) {
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187 // hmm, manifestFirst != BAD_REVISION here, hence there's i from [csetFirst..csetLast] for which manifest entry exists,
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188 // and thus it's impossible to run into manifestLast == BAD_REVISION. Nevertheless, never hurts to check.
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189 throw new HgInvalidStateException(String.format("Manifest %d-%d(!) for cset range [%d..%d] ", manifestFirst, manifestLast, csetFirst, csetLast));
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190 }
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191 if (manifestLast < manifestFirst) {
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192 // there are tool-constructed repositories that got order of changeset revisions completely different from that of manifest
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193 int x = manifestLast;
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194 manifestLast = manifestFirst;
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195 manifestFirst = x;
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196 }
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197 content.iterate(manifestFirst, manifestLast, true, new ManifestParser(inspector, encodingHelper));
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198 }
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199
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200 /**
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201 * "Sparse" iteration of the manifest, more effective than accessing revisions one by one.
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202 * <p> Inspector is invoked for each changeset revision supplied, even when there's no manifest
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203 * revision associated with a changeset (@see {@link #walk(int, int, Inspector)} for more details when it happens). Order inspector
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204 * gets invoked doesn't resemble order of changeset revisions supplied, manifest revisions are reported in the order they appear
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205 * in manifest revlog (with exception of changesets with missing manifest that may be reported in any order).
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206 *
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207 * @param inspector manifest revision visitor, can't be <code>null</code>
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208 * @param revisionIndexes local indexes of changesets to visit, non-<code>null</code>
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209 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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210 * @throws InvalidArgumentException if supplied arguments are <code>null</code>s
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211 */
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212 public void walk(final Inspector inspector, int... revisionIndexes) throws HgRuntimeException, IllegalArgumentException {
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213 if (inspector == null || revisionIndexes == null) {
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214 throw new IllegalArgumentException();
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215 }
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216 int[] manifestRevs = toManifestRevisionIndexes(revisionIndexes, inspector);
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217 content.iterate(manifestRevs, true, new ManifestParser(inspector, encodingHelper));
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218 }
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219
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220 //
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221 /**
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222 * Tells manifest revision number that corresponds to the given changeset. May return {@link HgRepository#BAD_REVISION}
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223 * if changeset has no associated manifest (cset records NULL nodeid for manifest).
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224 * @return manifest revision index, non-negative, or {@link HgRepository#BAD_REVISION}.
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225 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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226 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
390
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227 */
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228 /*package-local*/ int fromChangelog(int changesetRevisionIndex) throws HgInvalidRevisionException, HgInvalidControlFileException {
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229 if (HgInternals.wrongRevisionIndex(changesetRevisionIndex)) {
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230 throw new HgInvalidRevisionException(changesetRevisionIndex);
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231 }
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232 if (changesetRevisionIndex == HgRepository.WORKING_COPY || changesetRevisionIndex == HgRepository.BAD_REVISION) {
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233 throw new HgInvalidRevisionException("Can't use constants like WORKING_COPY or BAD_REVISION", null, changesetRevisionIndex);
257
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234 }
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235 // revisionNumber == TIP is processed by RevisionMapper
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236 if (revisionMap == null) {
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237 revisionMap = new RevisionMapper(getRepo());
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238 content.iterate(0, TIP, false, revisionMap);
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239 }
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240 return revisionMap.at(changesetRevisionIndex);
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241 }
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242
232
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243 /**
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244 * Extracts file revision as it was known at the time of given changeset.
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245 * <p>For more thorough details about file at specific changeset, use {@link HgChangesetFileSneaker}.
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246 * <p>To visit few changesets for the same file, use {@link #walkFileRevisions(Path, Inspector, int...)}
232
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247 *
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248 * @see #walkFileRevisions(Path, Inspector, int...)
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249 * @see HgChangesetFileSneaker
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250 * @param changelogRevisionIndex local changeset index
232
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251 * @param file path to file in question
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252 * @return file revision or <code>null</code> if manifest at specified revision doesn't list such file
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253 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
232
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254 */
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255 public Nodeid getFileRevision(int changelogRevisionIndex, final Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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256 // there's no need for HgDataFile to own this method, or get a delegate
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257 // as most of HgDataFile API is using file revision indexes, and there's easy step from file revision index to
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258 // both file revision and changeset revision index. But there's no easy way to go from changesetRevisionIndex to
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259 // file revision (the task this method solves), exept for HgFileInformer
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260 // I feel methods dealing with changeset indexes shall be more exposed in HgChangelog and HgManifest API.
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261 // TODO need tests
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262 int manifestRevIndex = fromChangelog(changelogRevisionIndex);
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263 if (manifestRevIndex == BAD_REVISION) {
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264 return null;
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265 }
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266 IntMap<Nodeid> resMap = new IntMap<Nodeid>(3);
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267 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, resMap, null);
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268 parser.walk(manifestRevIndex, content);
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269 return resMap.get(changelogRevisionIndex);
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270 }
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271
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272 /**
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273 * Visit file revisions as they were recorded at the time of given changesets. Same file revision may be reported as many times as
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274 * there are changesets that refer to that revision. Both {@link Inspector#begin(int, Nodeid, int)} and {@link Inspector#end(int)}
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275 * with appropriate values are invoked around {@link Inspector#next(Nodeid, Path, Flags)} call for the supplied file
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276 *
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277 * <p>NOTE, this method doesn't respect return values from callback (i.e. to stop iteration), as it's lookup of a single file
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278 * and canceling it seems superfluous. However, this may change in future and it's recommended to return <code>true</code> from
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279 * all {@link Inspector} methods.
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280 *
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281 * @see #getFileRevision(int, Path)
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282 * @param file path of interest
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283 * @param inspector callback to receive details about selected file
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284 * @param changelogRevisionIndexes changeset indexes to visit
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285 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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286 */
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287 public void walkFileRevisions(Path file, Inspector inspector, int... changelogRevisionIndexes) throws HgRuntimeException {
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288 if (file == null || inspector == null || changelogRevisionIndexes == null) {
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289 throw new IllegalArgumentException();
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290 }
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291 // TODO [post-1.0] need tests. There's Main#checkWalkFileRevisions that may be a starting point
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292 int[] manifestRevIndexes = toManifestRevisionIndexes(changelogRevisionIndexes, null);
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293 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, inspector);
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294 parser.walk(manifestRevIndexes, content);
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295 }
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296
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297 /**
417
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298 * Extract file {@link Flags flags} as they were recorded in appropriate manifest version.
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299 *
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300 * @see HgDataFile#getFlags(int)
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301 * @param changesetRevIndex changeset revision index
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302 * @param file path to look up
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303 * @return one of predefined enum values, or <code>null</code> if file was not known in the specified revision
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304 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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305 */
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306 public Flags getFileFlags(int changesetRevIndex, Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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307 int manifestRevIdx = fromChangelog(changesetRevIndex);
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308 IntMap<Flags> resMap = new IntMap<Flags>(2);
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309 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, null, resMap);
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310 parser.walk(manifestRevIdx, content);
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311 return resMap.get(changesetRevIndex);
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312 }
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313
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314
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315 /**
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316 * @param changelogRevisionIndexes non-null
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317 * @param inspector may be null if reporting of missing manifests is not needed
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318 * @throws HgInvalidRevisionException if arguments specify non-existent revision index
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319 * @throws IllegalArgumentException if any index argument is not a revision index
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320 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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321 */
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322 private int[] toManifestRevisionIndexes(int[] changelogRevisionIndexes, Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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323 int[] manifestRevs = new int[changelogRevisionIndexes.length];
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324 boolean needsSort = false;
390
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325 int j = 0;
367
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326 for (int i = 0; i < changelogRevisionIndexes.length; i++) {
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327 final int manifestRevisionIndex = fromChangelog(changelogRevisionIndexes[i]);
403
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328 if (manifestRevisionIndex == BAD_REVISION) {
390
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329 if (inspector != null) {
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330 inspector.begin(NO_REVISION, NULL, changelogRevisionIndexes[i]);
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331 inspector.end(NO_REVISION);
390
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332 }
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333 // othrwise, ignore changeset without manifest
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334 } else {
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335 manifestRevs[j] = manifestRevisionIndex;
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336 if (j > 0 && manifestRevs[j-1] > manifestRevisionIndex) {
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337 needsSort = true;
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338 }
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339 j++;
326
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340 }
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341 }
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342 if (needsSort) {
390
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343 Arrays.sort(manifestRevs, 0, j);
326
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344 }
390
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345 if (j == manifestRevs.length) {
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346 return manifestRevs;
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347 } else {
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348 int[] rv = new int[j];
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349 //Arrays.copyOfRange
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350 System.arraycopy(manifestRevs, 0, rv, 0, j);
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351 return rv;
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352 }
326
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353 }
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354
423
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355 @Callback
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40532cdc92fc Inspector (visitor) for manifest
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356 public interface Inspector {
285
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357 /**
537
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358 * Denotes entering specific manifest revision, separate entries are
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359 * reported with subsequence {@link #next(Nodeid, Path, Flags)} calls.
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360 *
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361 * @param mainfestRevisionIndex local revision index of the inspected revision
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362 * @param manifestRevision revision of the manifest we're about to iterate through
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363 * @param changelogRevisionIndex local revision index of changelog this manifest points to
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364 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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365 */
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366 boolean begin(int mainfestRevisionIndex, Nodeid manifestRevision, int changelogRevisionIndex);
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367
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368
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369 /**
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370 * Reports each manifest entry
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371 *
415
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372 * @param nid file revision
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373 * @param fname file name
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374 * @param flags one of {@link HgManifest.Flags} constants, not <code>null</code>
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375 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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376 */
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377 boolean next(Nodeid nid, Path fname, Flags flags);
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378
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379 /**
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380 * Denotes leaving specific manifest revision, after all entries were reported using {@link #next(Nodeid, Path, Flags)}
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381 *
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382 * @param manifestRevisionIndex indicates manifest revision, corresponds to opening {@link #begin(int, Nodeid, int)}
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383 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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384 */
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385 boolean end(int manifestRevisionIndex);
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386 }
424
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387
268
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388 /**
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389 * When Pool uses Strings directly,
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390 * ManifestParser creates new String instance with new char[] value, and does byte->char conversion.
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391 * For cpython repo, walk(0..10k), there are over 16 million filenames, of them only 3020 unique.
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392 * This means there are 15.9 million useless char[] instances and byte->char conversions
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393 *
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394 * When String (Path) is wrapped into {@link PathProxy}, there's extra overhead of byte[] representation
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395 * of the String, but these are only for unique Strings (Paths) (3020 in the example above). Besides, I save
268
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396 * useless char[] and byte->char conversions.
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397 */
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398 private static class PathProxy {
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399 private byte[] data;
268
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400 private int start;
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401 private final int hash, length;
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402 private Path result;
412
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403 private final EncodingHelper encHelper;
267
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404
412
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405 public PathProxy(byte[] data, int start, int length, EncodingHelper eh) {
267
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406 this.data = data;
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407 this.start = start;
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408 this.length = length;
412
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409 this.encHelper = eh;
267
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410
268
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411 // copy from String.hashCode(). In fact, not necessarily match result of String(data).hashCode
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412 // just need some nice algorithm here
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413 int h = 0;
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414 byte[] d = data;
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415 for (int i = 0, off = start, len = length; i < len; i++) {
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416 h = 31 * h + d[off++];
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417 }
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418 hash = h;
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419 }
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420
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421 @Override
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422 public boolean equals(Object obj) {
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423 if (false == obj instanceof PathProxy) {
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424 return false;
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425 }
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426 PathProxy o = (PathProxy) obj;
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427 if (o.result != null && result != null) {
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428 return result.equals(o.result);
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429 }
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430 if (o.length != length || o.hash != hash) {
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431 return false;
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432 }
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433 for (int i = 0, x = o.start, y = start; i < length; i++) {
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434 if (o.data[x++] != data[y++]) {
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435 return false;
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436 }
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437 }
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438 return true;
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439 }
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440 @Override
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441 public int hashCode() {
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442 return hash;
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443 }
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444
285
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445 public Path freeze() {
267
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446 if (result == null) {
412
63c5a9d7ca3f Follow-up for Issue 29: unify path translation for manifest and dirstate
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447 result = Path.create(encHelper.fromManifest(data, start, length));
268
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448 // release reference to bigger data array, make a copy of relevant part only
285
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449 // use original bytes, not those from String above to avoid cache misses due to different encodings
268
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450 byte[] d = new byte[length];
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451 System.arraycopy(data, start, d, 0, length);
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452 data = d;
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453 start = 0;
267
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454 }
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455 return result;
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456 }
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457 }
196
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458
312
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459 private static class ManifestParser implements RevlogStream.Inspector, Lifecycle {
196
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460 private final Inspector inspector;
431
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461 private IdentityPool<Nodeid> nodeidPool, thisRevPool;
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462 private final IdentityPool<PathProxy> fnamePool;
266
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463 private byte[] nodeidLookupBuffer = new byte[20]; // get reassigned each time new Nodeid is added to pool
312
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464 private final ProgressSupport progressHelper;
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465 private IterateControlMediator iterateControl;
412
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466 private final EncodingHelper encHelper;
262
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467
412
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468 public ManifestParser(Inspector delegate, EncodingHelper eh) {
196
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469 assert delegate != null;
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470 inspector = delegate;
412
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diff changeset
471 encHelper = eh;
431
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472 nodeidPool = new IdentityPool<Nodeid>();
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473 fnamePool = new IdentityPool<PathProxy>();
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diff changeset
474 thisRevPool = new IdentityPool<Nodeid>();
312
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475 progressHelper = ProgressSupport.Factory.get(delegate);
196
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476 }
268
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477
423
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diff changeset
478 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
196
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diff changeset
479 try {
312
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480 if (!inspector.begin(revisionNumber, new Nodeid(nodeid, true), linkRevision)) {
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diff changeset
481 iterateControl.stop();
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diff changeset
482 return;
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483 }
372
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diff changeset
484 if (!da.isEmpty()) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
485 // although unlikely, manifest entry may be empty, when all files have been deleted from the repository
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diff changeset
486 Path fname = null;
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487 Flags flags = null;
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488 Nodeid nid = null;
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diff changeset
489 int i;
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diff changeset
490 byte[] data = da.byteArray();
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diff changeset
491 for (i = 0; i < actualLen; i++) {
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diff changeset
492 int x = i;
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diff changeset
493 for( ; data[i] != '\n' && i < actualLen; i++) {
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diff changeset
494 if (fname == null && data[i] == 0) {
412
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diff changeset
495 PathProxy px = fnamePool.unify(new PathProxy(data, x, i - x, encHelper));
372
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496 // if (cached = fnamePool.unify(px))== px then cacheMiss, else cacheHit
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diff changeset
497 // cpython 0..10k: hits: 15 989 152, misses: 3020
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diff changeset
498 fname = px.freeze();
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499 x = i+1;
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500 }
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501 }
372
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502 if (i < actualLen) {
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diff changeset
503 assert data[i] == '\n';
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504 int nodeidLen = i - x < 40 ? i-x : 40; // if > 40, there are flags
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diff changeset
505 DigestHelper.ascii2bin(data, x, nodeidLen, nodeidLookupBuffer); // ignore return value as it's unlikely to have NULL in manifest
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diff changeset
506 nid = new Nodeid(nodeidLookupBuffer, false); // this Nodeid is for pool lookup only, mock object
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507 Nodeid cached = nodeidPool.unify(nid);
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diff changeset
508 if (cached == nid) {
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diff changeset
509 // buffer now belongs to the cached nodeid
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diff changeset
510 nodeidLookupBuffer = new byte[20];
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diff changeset
511 } else {
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diff changeset
512 nid = cached; // use existing version, discard the lookup object
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diff changeset
513 } // for cpython 0..10k, cache hits are 15 973 301, vs 18871 misses.
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diff changeset
514 thisRevPool.record(nid); // memorize revision for the next iteration.
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diff changeset
515 if (nodeidLen + x < i) {
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diff changeset
516 // 'x' and 'l' for executable bits and symlinks?
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diff changeset
517 // hg --debug manifest shows 644 for each regular file in my repo
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diff changeset
518 // for cpython 0..10k, there are 4361062 flag checks, and there's only 1 unique flag
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diff changeset
519 flags = Flags.parse(data, x + nodeidLen, i-x-nodeidLen);
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diff changeset
520 } else {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
521 flags = Flags.RegularFile;
372
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diff changeset
522 }
424
6437d261048a Deprecated code removed
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diff changeset
523 boolean good2go = inspector.next(nid, fname, flags);
372
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diff changeset
524 if (!good2go) {
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diff changeset
525 iterateControl.stop();
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diff changeset
526 return;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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diff changeset
527 }
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diff changeset
528 }
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diff changeset
529 nid = null;
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diff changeset
530 fname = null;
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diff changeset
531 flags = null;
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532 }
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533 }
312
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diff changeset
534 if (!inspector.end(revisionNumber)) {
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diff changeset
535 iterateControl.stop();
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diff changeset
536 return;
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diff changeset
537 }
262
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
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diff changeset
538 //
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
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diff changeset
539 // keep only actual file revisions, found at this version
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diff changeset
540 // (next manifest is likely to refer to most of them, although in specific cases
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
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diff changeset
541 // like commit in another branch a lot may be useless)
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diff changeset
542 nodeidPool.clear();
431
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
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diff changeset
543 IdentityPool<Nodeid> t = nodeidPool;
262
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diff changeset
544 nodeidPool = thisRevPool;
264
6bb5e7ed051a Optimize memory usage (reduce number of objects instantiated) when pooling file names and nodeids during manifest parsing
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diff changeset
545 thisRevPool = t;
313
c1e3c18fd2f2 Test manifest cancellation
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diff changeset
546 iterateControl.checkCancelled();
312
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diff changeset
547 progressHelper.worked(1);
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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diff changeset
548 } catch (IOException ex) {
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
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parents: 421
diff changeset
549 throw new HgInvalidControlFileException("Failed reading manifest", ex, null).setRevisionIndex(revisionNumber);
196
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diff changeset
550 }
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diff changeset
551 }
312
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diff changeset
552
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diff changeset
553 public void start(int count, Callback callback, Object token) {
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diff changeset
554 CancelSupport cs = CancelSupport.Factory.get(inspector, null);
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diff changeset
555 iterateControl = new IterateControlMediator(cs, callback);
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diff changeset
556 progressHelper.start(count);
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diff changeset
557 }
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diff changeset
558
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559 public void finish(Object token) {
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560 progressHelper.done();
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561 }
196
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562 }
218
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563
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564 private static class RevisionMapper implements RevlogStream.Inspector, Lifecycle {
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565
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566 private final int changelogRevisionCount;
218
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567 private int[] changelog2manifest;
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568 private final HgRepository repo;
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569
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570 public RevisionMapper(HgRepository hgRepo) {
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571 repo = hgRepo;
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572 changelogRevisionCount = repo.getChangelog().getRevisionCount();
218
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573 }
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574
403
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575 /**
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576 * Get index of manifest revision that corresponds to specified changeset
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577 * @param changesetRevisionIndex non-negative index of changelog revision, or {@link HgRepository#TIP}
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578 * @return index of manifest revision, or {@link HgRepository#BAD_REVISION} if changeset doesn't reference a valid manifest
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579 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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580 */
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581 public int at(int changesetRevisionIndex) throws HgInvalidRevisionException {
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582 if (changesetRevisionIndex == TIP) {
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583 changesetRevisionIndex = changelogRevisionCount - 1;
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584 }
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585 if (changesetRevisionIndex >= changelogRevisionCount) {
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586 throw new HgInvalidRevisionException(changesetRevisionIndex);
257
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587 }
218
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588 if (changelog2manifest != null) {
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589 return changelog2manifest[changesetRevisionIndex];
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590 }
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591 return changesetRevisionIndex;
218
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592 }
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593
324
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594 // XXX likely can be replaced with Revlog.RevisionInspector
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595 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
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diff changeset
596 if (changelog2manifest != null) {
220
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597 // next assertion is not an error, rather assumption check, which is too development-related to be explicit exception -
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598 // I just wonder if there are manifests that have two entries pointing to single changeset. It seems unrealistic, though -
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599 // changeset records one and only one manifest nodeid
403
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600 assert changelog2manifest[linkRevision] == BAD_REVISION : String.format("revision:%d, link:%d, already linked to revision:%d", revisionNumber, linkRevision, changelog2manifest[linkRevision]);
218
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601 changelog2manifest[linkRevision] = revisionNumber;
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602 } else {
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603 if (revisionNumber != linkRevision) {
403
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diff changeset
604 changelog2manifest = new int[changelogRevisionCount];
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605 Arrays.fill(changelog2manifest, BAD_REVISION);
218
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606 for (int i = 0; i < revisionNumber; changelog2manifest[i] = i, i++)
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607 ;
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608 changelog2manifest[linkRevision] = revisionNumber;
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609 }
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610 }
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611 }
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612
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613 public void start(int count, Callback callback, Object token) {
403
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614 if (count != changelogRevisionCount) {
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615 assert count < changelogRevisionCount; // no idea what to do if manifest has more revisions than changelog
218
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616 // the way how manifest may contain more revisions than changelog, as I can imagine, is a result of
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617 // some kind of an import tool (e.g. from SVN or CVS), that creates manifest and changelog independently.
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618 // Note, it's pure guess, I didn't see such repository yet (although the way manifest revisions
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619 // in cpython repo are numbered makes me think aforementioned way)
403
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620 changelog2manifest = new int[changelogRevisionCount];
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621 Arrays.fill(changelog2manifest, BAD_REVISION);
218
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622 }
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623 }
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624
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625 public void finish(Object token) {
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626 if (changelog2manifest == null) {
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627 return;
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628 }
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629 // I assume there'd be not too many revisions we don't know manifest of
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630 ArrayList<Integer> undefinedChangelogRevision = new ArrayList<Integer>();
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631 for (int i = 0; i < changelog2manifest.length; i++) {
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632 if (changelog2manifest[i] == BAD_REVISION) {
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633 undefinedChangelogRevision.add(i);
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634 }
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635 }
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636 for (int u : undefinedChangelogRevision) {
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637 Nodeid manifest = repo.getChangelog().range(u, u).get(0).manifest();
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638 // TODO calculate those missing effectively (e.g. cache and sort nodeids to speed lookup
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639 // right away in the #next (may refactor ParentWalker's sequential and sorted into dedicated helper and reuse here)
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640 if (manifest.isNull()) {
490
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diff changeset
641 repo.getSessionContext().getLog().dump(getClass(), Severity.Warn, "Changeset %d has no associated manifest entry", u);
423
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642 // keep -1 in the changelog2manifest map.
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643 } else {
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644 changelog2manifest[u] = repo.getManifest().getRevisionIndex(manifest);
354
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645 }
218
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646 }
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647 }
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648 }
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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649
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diff changeset
650 /**
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651 * Look up specified file in possibly multiple manifest revisions, collect file revision and flags.
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652 */
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653 private static class FileLookupInspector implements RevlogStream.Inspector {
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654
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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diff changeset
655 private final Path filename;
415
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656 private final byte[] filenameAsBytes;
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657 private final IntMap<Nodeid> csetIndex2FileRev;
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658 private final IntMap<Flags> csetIndex2Flags;
426
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659 private final Inspector delegate;
415
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660
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661 public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, IntMap<Nodeid> csetIndex2FileRevMap, IntMap<Flags> csetIndex2FlagsMap) {
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662 assert fileToLookUp != null;
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663 // need at least one map for the inspector to make any sense
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664 assert csetIndex2FileRevMap != null || csetIndex2FlagsMap != null;
426
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665 filename = fileToLookUp;
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diff changeset
666 filenameAsBytes = eh.toManifest(fileToLookUp.toString());
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667 delegate = null;
415
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668 csetIndex2FileRev = csetIndex2FileRevMap;
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diff changeset
669 csetIndex2Flags = csetIndex2FlagsMap;
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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670 }
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671
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672 public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, Inspector delegateInspector) {
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673 assert fileToLookUp != null;
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674 assert delegateInspector != null;
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675 filename = fileToLookUp;
415
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676 filenameAsBytes = eh.toManifest(fileToLookUp.toString());
426
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677 delegate = delegateInspector;
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678 csetIndex2FileRev = null;
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679 csetIndex2Flags = null;
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680 }
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681
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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682 void walk(int manifestRevIndex, RevlogStream content) {
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683 content.iterate(manifestRevIndex, manifestRevIndex, true, this);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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684 }
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diff changeset
685
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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686 void walk(int[] manifestRevIndexes, RevlogStream content) {
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diff changeset
687 content.iterate(manifestRevIndexes, true, this);
415
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688 }
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689
423
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690 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
415
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691 ByteArrayOutputStream bos = new ByteArrayOutputStream();
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692 try {
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693 byte b;
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694 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
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695 if (b != 0) {
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696 bos.write(b);
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697 } else {
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698 byte[] byteArray = bos.toByteArray();
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699 bos.reset();
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700 if (Arrays.equals(filenameAsBytes, byteArray)) {
426
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701 Nodeid fileRev = null;
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702 Flags flags = null;
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703 if (csetIndex2FileRev != null || delegate != null) {
415
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diff changeset
704 byte[] nid = new byte[40];
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diff changeset
705 data.readBytes(nid, 0, 40);
426
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706 fileRev = Nodeid.fromAscii(nid, 0, 40);
415
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707 } else {
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708 data.skip(40);
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709 }
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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710 if (csetIndex2Flags != null || delegate != null) {
415
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diff changeset
711 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
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diff changeset
712 bos.write(b);
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diff changeset
713 }
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diff changeset
714 if (bos.size() == 0) {
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diff changeset
715 flags = Flags.RegularFile;
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diff changeset
716 } else {
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diff changeset
717 flags = Flags.parse(bos.toByteArray(), 0, bos.size());
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diff changeset
718 }
426
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diff changeset
719
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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diff changeset
720 }
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parents: 425
diff changeset
721 if (delegate != null) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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diff changeset
722 assert flags != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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diff changeset
723 assert fileRev != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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diff changeset
724 delegate.begin(revisionNumber, Nodeid.fromBinary(nodeid, 0), linkRevision);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
725 delegate.next(fileRev, filename, flags);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
726 delegate.end(revisionNumber);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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diff changeset
727
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
728 } else {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
729 if (csetIndex2FileRev != null) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
730 csetIndex2FileRev.put(linkRevision, fileRev);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
731 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
732 if (csetIndex2Flags != null) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
733 csetIndex2Flags.put(linkRevision, flags);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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diff changeset
734 }
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
735 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
736 break;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
737 } else {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
738 data.skip(40);
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
739 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
740 // else skip to the end of line
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
741 while (!data.isEmpty() && (b = data.readByte()) != '\n')
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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diff changeset
742 ;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
743 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
744 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
745 } catch (IOException ex) {
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 421
diff changeset
746 throw new HgInvalidControlFileException("Failed reading manifest", ex, null);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
747 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
748 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
749 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
750 }