annotate src/org/tmatesoft/hg/repo/HgManifest.java @ 449:5787e912f60e smartgit3

Speed up changeset phase detection when no parent cache is avalable
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 07 Jun 2012 16:01:09 +0200
parents 63c5a9d7ca3f
children bb278ccf9866
rev   line source
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1 /*
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2 * Copyright (c) 2010-2012 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.repo;
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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.BAD_REVISION;
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21 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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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 import java.util.HashMap;
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28 import java.util.Map;
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30 import org.tmatesoft.hg.core.HgBadStateException;
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31 import org.tmatesoft.hg.core.HgException;
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32 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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33 import org.tmatesoft.hg.core.Nodeid;
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34 import org.tmatesoft.hg.internal.DataAccess;
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35 import org.tmatesoft.hg.internal.DigestHelper;
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36 import org.tmatesoft.hg.internal.EncodingHelper;
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37 import org.tmatesoft.hg.internal.Experimental;
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38 import org.tmatesoft.hg.internal.IterateControlMediator;
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39 import org.tmatesoft.hg.internal.Lifecycle;
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40 import org.tmatesoft.hg.internal.Pool2;
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41 import org.tmatesoft.hg.internal.RevlogStream;
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42 import org.tmatesoft.hg.util.CancelSupport;
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43 import org.tmatesoft.hg.util.Path;
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44 import org.tmatesoft.hg.util.ProgressSupport;
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45
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46
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47 /**
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48 *
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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 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 public enum Flags {
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57 Exec, Link;
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58
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59 static Flags parse(String flags) {
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60 if ("x".equalsIgnoreCase(flags)) {
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61 return Exec;
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62 }
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63 if ("l".equalsIgnoreCase(flags)) {
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64 return Link;
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65 }
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66 if (flags == null) {
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67 return null;
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68 }
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69 throw new IllegalStateException(flags);
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70 }
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71
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72 static Flags parse(byte[] data, int start, int length) {
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73 if (length == 0) {
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74 return null;
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75 }
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76 if (length == 1) {
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77 if (data[start] == 'x') {
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78 return Exec;
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79 }
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80 if (data[start] == 'l') {
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81 return Link;
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82 }
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83 // FALL THROUGH
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84 }
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85 throw new IllegalStateException(new String(data, start, length));
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86 }
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87
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88 String nativeString() {
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89 if (this == Exec) {
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90 return "x";
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91 }
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92 if (this == Link) {
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93 return "l";
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94 }
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95 throw new IllegalStateException(toString());
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96 }
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97 }
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99 /*package-local*/ HgManifest(HgRepository hgRepo, RevlogStream content, EncodingHelper eh) {
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100 super(hgRepo, content);
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101 encodingHelper = eh;
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102 }
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103
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104 /**
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105 * Walks manifest revisions that correspond to specified range of changesets. The order in which manifest versions get reported
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106 * to the inspector corresponds to physical order of manifest revisions, not that of changesets (with few exceptions as noted below).
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107 * That is, for cset-manifest revision pairs:
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108 * <pre>
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109 * 3 8
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110 * 4 7
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111 * 5 9
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112 * </pre>
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113 * call <code>walk(3,5, insp)</code> would yield (4,7), (3,8) and (5,9) to the inspector;
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114 * different order of arguments, <code>walk(5, 3, insp)</code>, makes no difference.
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115 *
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116 * <p>Physical layout of mercurial files (revlog) doesn't impose any restriction on whether manifest and changeset revisions shall go
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117 * 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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118 * as corresponding manifest revision. This situation is deemed exceptional now and what would <code>inspector</code> get depends on whether
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119 * <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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120 * <code>[start..end]</code>. Implementation does it best to report empty manifests (<code>Inspector.begin(BAD_REVISION, NULL, csetRevIndex);</code>
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121 * followed immediately by <code>Inspector.end(BAD_REVISION)</code> when <code>start</code> and/or <code>end</code> point to changeset with no associated
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122 * manifest revision. However, if changeset-manifest revision pairs look like:
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123 * <pre>
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124 * 3 8
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125 * 4 -1 (cset records null revision for manifest)
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126 * 5 9
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127 * </pre>
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128 * 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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129 * <code>Inspector.begin(); Inspector.end()</code> call pair.
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130 *
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131 * @param start changelog (not manifest!) revision to begin with
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132 * @param end changelog (not manifest!) revision to stop, inclusive.
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133 * @param inspector manifest revision visitor, can't be <code>null</code>
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134 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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135 */
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136 public void walk(int start, int end, final Inspector inspector) throws /*FIXME HgInvalidRevisionException,*/ HgInvalidControlFileException {
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137 if (inspector == null) {
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138 throw new IllegalArgumentException();
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139 }
390
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140 final int csetFirst = start <= end ? start : end, csetLast = start > end ? start : end;
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141 int manifestFirst, manifestLast, i = 0;
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142 do {
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143 manifestFirst = fromChangelog(csetFirst+i);
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144 if (manifestFirst == -1) {
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145 inspector.begin(BAD_REVISION, NULL, csetFirst+i);
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146 inspector.end(BAD_REVISION);
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147 }
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148 i++;
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149 } while (manifestFirst == -1 && csetFirst+i <= csetLast);
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150 if (manifestFirst == -1) {
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151 getRepo().getContext().getLog().info(getClass(), "None of changesets [%d..%d] have associated manifest revision", csetFirst, csetLast);
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152 // we ran through all revisions in [start..end] and none of them had manifest.
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153 // we reported that to inspector and proceeding is done now.
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154 return;
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155 }
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156 i = 0;
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157 do {
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158 manifestLast = fromChangelog(csetLast-i);
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159 if (manifestLast == -1) {
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160 inspector.begin(BAD_REVISION, NULL, csetLast-i);
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161 inspector.end(BAD_REVISION);
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162 }
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163 i++;
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164 } while (manifestLast == -1 && csetLast-i >= csetFirst);
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165 if (manifestLast == -1) {
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166 // hmm, manifestFirst != -1 here, hence there's i from [csetFirst..csetLast] for which manifest entry exists,
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167 // and thus it's impossible to run into manifestLast == -1. Nevertheless, never hurts to check.
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168 throw new HgBadStateException(String.format("Manifest %d-%d(!) for cset range [%d..%d] ", manifestFirst, manifestLast, csetFirst, csetLast));
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169 }
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170 if (manifestLast < manifestFirst) {
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171 // there are tool-constructed repositories that got order of changeset revisions completely different from that of manifest
390
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172 int x = manifestLast;
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173 manifestLast = manifestFirst;
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174 manifestFirst = x;
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175 }
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176 content.iterate(manifestFirst, manifestLast, true, new ManifestParser(inspector, encodingHelper));
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177 }
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178
254
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179 /**
390
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180 * "Sparse" iteration of the manifest, more effective than accessing revisions one by one.
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181 * <p> Inspector is invoked for each changeset revision supplied, even when there's no manifest
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182 * revision associated with a changeset (@see {@link #walk(int, int, Inspector)} for more details when it happens). Order inspector
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183 * gets invoked doesn't resemble order of changeset revisions supplied, manifest revisions are reported in the order they appear
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184 * in manifest revlog (with exception of changesets with missing manifest that may be reported in any order).
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185 *
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186 * @param inspector manifest revision visitor, can't be <code>null</code>
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187 * @param revisionIndexes local indexes of changesets to visit, non-<code>null</code>
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188 */
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189 public void walk(final Inspector inspector, int... revisionIndexes) throws HgInvalidControlFileException{
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190 if (inspector == null || revisionIndexes == null) {
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191 throw new IllegalArgumentException();
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192 }
390
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193 int[] manifestRevs = toManifestRevisionIndexes(revisionIndexes, inspector);
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194 content.iterate(manifestRevs, true, new ManifestParser(inspector, encodingHelper));
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195 }
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196
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197 //
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198 /**
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199 * Tells manifest revision number that corresponds to the given changeset.
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200 * @return manifest revision index, or -1 if changeset has no associated manifest (cset records NULL nodeid for manifest)
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201 */
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202 /*package-local*/ int fromChangelog(int changesetRevisionIndex) throws HgInvalidControlFileException {
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203 if (HgInternals.wrongRevisionIndex(changesetRevisionIndex)) {
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204 throw new IllegalArgumentException(String.valueOf(changesetRevisionIndex));
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205 }
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206 if (changesetRevisionIndex == HgRepository.WORKING_COPY || changesetRevisionIndex == HgRepository.BAD_REVISION) {
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207 throw new IllegalArgumentException("Can't use constants like WORKING_COPY or BAD_REVISION");
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208 }
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209 // revisionNumber == TIP is processed by RevisionMapper
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210 if (revisionMap == null) {
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211 revisionMap = new RevisionMapper(getRepo());
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212 content.iterate(0, TIP, false, revisionMap);
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213 }
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214 return revisionMap.at(changesetRevisionIndex);
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215 }
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216
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217 /**
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218 * Extracts file revision as it was known at the time of given changeset.
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219 *
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220 * @param changelogRevisionIndex local changeset index
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221 * @param file path to file in question
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222 * @return file revision or <code>null</code> if manifest at specified revision doesn't list such file
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223 */
326
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224 @Experimental(reason="Perhaps, HgDataFile shall own this method, or get a delegate?")
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225 public Nodeid getFileRevision(int changelogRevisionIndex, final Path file) throws HgInvalidControlFileException{
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226 return getFileRevisions(file, changelogRevisionIndex).get(changelogRevisionIndex);
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227 }
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228
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229 // XXX package-local, IntMap, and HgDataFile getFileRevisionAt(int... localChangelogRevisions)
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230 @Experimental(reason="@see #getFileRevision")
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231 public Map<Integer, Nodeid> getFileRevisions(final Path file, int... changelogRevisionIndexes) throws HgInvalidControlFileException{
326
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232 // FIXME need tests
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233 int[] manifestRevisionIndexes = toManifestRevisionIndexes(changelogRevisionIndexes, null);
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234 final HashMap<Integer,Nodeid> rv = new HashMap<Integer, Nodeid>(changelogRevisionIndexes.length);
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235 content.iterate(manifestRevisionIndexes, true, new RevlogStream.Inspector() {
232
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236
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237 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) throws HgException {
232
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238 ByteArrayOutputStream bos = new ByteArrayOutputStream();
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239 try {
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240 byte b;
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241 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
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242 if (b != 0) {
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243 bos.write(b);
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244 } else {
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245 String fname = new String(bos.toByteArray());
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246 bos.reset();
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247 if (file.toString().equals(fname)) {
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248 byte[] nid = new byte[40];
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249 data.readBytes(nid, 0, 40);
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250 rv.put(linkRevision, Nodeid.fromAscii(nid, 0, 40));
232
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251 break;
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252 } else {
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253 data.skip(40);
232
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254 }
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255 // else skip to the end of line
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256 while (!data.isEmpty() && (b = data.readByte()) != '\n')
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257 ;
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258 }
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259 }
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260 } catch (IOException ex) {
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261 throw new HgException(ex);
232
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262 }
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263 }
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264 });
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265 return rv;
232
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266 }
326
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267
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268
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269 /**
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270 * @param changelogRevisionIndexes non-null
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271 * @param inspector may be null if reporting of missing manifests is not needed
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272 */
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273 private int[] toManifestRevisionIndexes(int[] changelogRevisionIndexes, Inspector inspector) throws HgInvalidControlFileException {
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274 int[] manifestRevs = new int[changelogRevisionIndexes.length];
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275 boolean needsSort = false;
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276 int j = 0;
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277 for (int i = 0; i < changelogRevisionIndexes.length; i++) {
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278 final int manifestRevisionIndex = fromChangelog(changelogRevisionIndexes[i]);
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279 if (manifestRevisionIndex == -1) {
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280 if (inspector != null) {
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281 inspector.begin(BAD_REVISION, NULL, changelogRevisionIndexes[i]);
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282 inspector.end(BAD_REVISION);
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283 }
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284 // othrwise, ignore changeset without manifest
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285 } else {
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286 manifestRevs[j] = manifestRevisionIndex;
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287 if (j > 0 && manifestRevs[j-1] > manifestRevisionIndex) {
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288 needsSort = true;
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289 }
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290 j++;
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291 }
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292 }
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293 if (needsSort) {
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294 Arrays.sort(manifestRevs, 0, j);
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295 }
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296 if (j == manifestRevs.length) {
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297 return manifestRevs;
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298 } else {
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299 int[] rv = new int[j];
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300 //Arrays.copyOfRange
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301 System.arraycopy(manifestRevs, 0, rv, 0, j);
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302 return rv;
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303 }
326
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304 }
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305
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306 public interface Inspector {
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307 boolean begin(int mainfestRevision, Nodeid nid, int changelogRevision);
285
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308 /**
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309 * @deprecated switch to {@link Inspector2#next(Nodeid, Path, Flags)}
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310 */
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311 @Deprecated
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312 boolean next(Nodeid nid, String fname, String flags);
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313 boolean end(int manifestRevision);
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314 }
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315
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316 @Experimental(reason="Explore Path alternative for filenames and enum for flags")
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317 public interface Inspector2 extends Inspector {
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318 boolean next(Nodeid nid, Path fname, Flags flags);
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319 }
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320
268
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321 /**
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322 * When Pool uses Strings directly,
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323 * ManifestParser creates new String instance with new char[] value, and does byte->char conversion.
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324 * For cpython repo, walk(0..10k), there are over 16 million filenames, of them only 3020 unique.
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325 * This means there are 15.9 million useless char[] instances and byte->char conversions
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326 *
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327 * When String (Path) is wrapped into {@link PathProxy}, there's extra overhead of byte[] representation
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328 * of the String, but these are only for unique Strings (Paths) (3020 in the example above). Besides, I save
268
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329 * useless char[] and byte->char conversions.
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330 */
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331 private static class PathProxy {
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332 private byte[] data;
268
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333 private int start;
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334 private final int hash, length;
285
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335 private Path result;
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336 private final EncodingHelper encHelper;
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337
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338 public PathProxy(byte[] data, int start, int length, EncodingHelper eh) {
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339 this.data = data;
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340 this.start = start;
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341 this.length = length;
412
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342 this.encHelper = eh;
267
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343
268
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344 // copy from String.hashCode(). In fact, not necessarily match result of String(data).hashCode
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345 // just need some nice algorithm here
267
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346 int h = 0;
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347 byte[] d = data;
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348 for (int i = 0, off = start, len = length; i < len; i++) {
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349 h = 31 * h + d[off++];
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350 }
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351 hash = h;
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352 }
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353
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354 @Override
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355 public boolean equals(Object obj) {
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356 if (false == obj instanceof PathProxy) {
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357 return false;
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358 }
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359 PathProxy o = (PathProxy) obj;
267
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360 if (o.result != null && result != null) {
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361 return result.equals(o.result);
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362 }
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363 if (o.length != length || o.hash != hash) {
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364 return false;
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365 }
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366 for (int i = 0, x = o.start, y = start; i < length; i++) {
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367 if (o.data[x++] != data[y++]) {
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368 return false;
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369 }
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370 }
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371 return true;
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372 }
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373 @Override
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374 public int hashCode() {
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375 return hash;
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376 }
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377
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378 public Path freeze() {
267
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379 if (result == null) {
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380 result = Path.create(encHelper.fromManifest(data, start, length));
268
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381 // release reference to bigger data array, make a copy of relevant part only
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382 // use original bytes, not those from String above to avoid cache misses due to different encodings
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383 byte[] d = new byte[length];
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384 System.arraycopy(data, start, d, 0, length);
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385 data = d;
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386 start = 0;
267
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387 }
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388 return result;
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389 }
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390 }
196
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391
312
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392 private static class ManifestParser implements RevlogStream.Inspector, Lifecycle {
196
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393 private final Inspector inspector;
285
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394 private final Inspector2 inspector2;
304
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395 private Pool2<Nodeid> nodeidPool, thisRevPool;
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396 private final Pool2<PathProxy> fnamePool;
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397 private byte[] nodeidLookupBuffer = new byte[20]; // get reassigned each time new Nodeid is added to pool
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398 private final ProgressSupport progressHelper;
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399 private IterateControlMediator iterateControl;
412
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400 private final EncodingHelper encHelper;
262
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401
412
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402 public ManifestParser(Inspector delegate, EncodingHelper eh) {
196
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403 assert delegate != null;
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404 inspector = delegate;
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405 inspector2 = delegate instanceof Inspector2 ? (Inspector2) delegate : null;
412
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406 encHelper = eh;
304
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407 nodeidPool = new Pool2<Nodeid>();
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408 fnamePool = new Pool2<PathProxy>();
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409 thisRevPool = new Pool2<Nodeid>();
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410 progressHelper = ProgressSupport.Factory.get(delegate);
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411 }
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412
366
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413 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) throws HgException {
196
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414 try {
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415 if (!inspector.begin(revisionNumber, new Nodeid(nodeid, true), linkRevision)) {
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416 iterateControl.stop();
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417 return;
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418 }
372
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419 if (!da.isEmpty()) {
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420 // although unlikely, manifest entry may be empty, when all files have been deleted from the repository
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421 Path fname = null;
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422 Flags flags = null;
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423 Nodeid nid = null;
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424 int i;
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425 byte[] data = da.byteArray();
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426 for (i = 0; i < actualLen; i++) {
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427 int x = i;
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428 for( ; data[i] != '\n' && i < actualLen; i++) {
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429 if (fname == null && data[i] == 0) {
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430 PathProxy px = fnamePool.unify(new PathProxy(data, x, i - x, encHelper));
372
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431 // if (cached = fnamePool.unify(px))== px then cacheMiss, else cacheHit
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432 // cpython 0..10k: hits: 15 989 152, misses: 3020
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diff changeset
433 fname = px.freeze();
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434 x = i+1;
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435 }
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436 }
372
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437 if (i < actualLen) {
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diff changeset
438 assert data[i] == '\n';
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439 int nodeidLen = i - x < 40 ? i-x : 40; // if > 40, there are flags
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440 DigestHelper.ascii2bin(data, x, nodeidLen, nodeidLookupBuffer); // ignore return value as it's unlikely to have NULL in manifest
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diff changeset
441 nid = new Nodeid(nodeidLookupBuffer, false); // this Nodeid is for pool lookup only, mock object
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442 Nodeid cached = nodeidPool.unify(nid);
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diff changeset
443 if (cached == nid) {
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444 // buffer now belongs to the cached nodeid
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diff changeset
445 nodeidLookupBuffer = new byte[20];
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diff changeset
446 } else {
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447 nid = cached; // use existing version, discard the lookup object
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448 } // for cpython 0..10k, cache hits are 15 973 301, vs 18871 misses.
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diff changeset
449 thisRevPool.record(nid); // memorize revision for the next iteration.
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diff changeset
450 if (nodeidLen + x < i) {
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diff changeset
451 // 'x' and 'l' for executable bits and symlinks?
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diff changeset
452 // hg --debug manifest shows 644 for each regular file in my repo
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diff changeset
453 // for cpython 0..10k, there are 4361062 flag checks, and there's only 1 unique flag
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diff changeset
454 flags = Flags.parse(data, x + nodeidLen, i-x-nodeidLen);
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diff changeset
455 } else {
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456 flags = null;
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457 }
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diff changeset
458 boolean good2go;
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diff changeset
459 if (inspector2 == null) {
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diff changeset
460 String flagString = flags == null ? null : flags.nativeString();
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diff changeset
461 good2go = inspector.next(nid, fname.toString(), flagString);
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462 } else {
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463 good2go = inspector2.next(nid, fname, flags);
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diff changeset
464 }
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diff changeset
465 if (!good2go) {
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diff changeset
466 iterateControl.stop();
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467 return;
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468 }
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469 }
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diff changeset
470 nid = null;
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diff changeset
471 fname = null;
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diff changeset
472 flags = null;
196
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473 }
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diff changeset
474 }
312
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diff changeset
475 if (!inspector.end(revisionNumber)) {
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diff changeset
476 iterateControl.stop();
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diff changeset
477 return;
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diff changeset
478 }
262
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479 //
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480 // keep only actual file revisions, found at this version
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diff changeset
481 // (next manifest is likely to refer to most of them, although in specific cases
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482 // like commit in another branch a lot may be useless)
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diff changeset
483 nodeidPool.clear();
304
85b8efde5586 Use memory-friendly set implementation to canonicalize filenames and nodeids
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diff changeset
484 Pool2<Nodeid> t = nodeidPool;
262
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485 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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486 thisRevPool = t;
313
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487 iterateControl.checkCancelled();
312
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488 progressHelper.worked(1);
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489 } catch (IOException ex) {
366
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diff changeset
490 throw new HgException(ex);
196
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491 }
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diff changeset
492 }
312
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493
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494 public void start(int count, Callback callback, Object token) {
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495 CancelSupport cs = CancelSupport.Factory.get(inspector, null);
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496 iterateControl = new IterateControlMediator(cs, callback);
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497 progressHelper.start(count);
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498 }
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499
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diff changeset
500 public void finish(Object token) {
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501 progressHelper.done();
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502 }
196
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503 }
218
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504
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505 private static class RevisionMapper implements RevlogStream.Inspector, Lifecycle {
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506
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507 private final int changelogRevisions;
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508 private int[] changelog2manifest;
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509 private final HgRepository repo;
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diff changeset
510
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511 public RevisionMapper(HgRepository hgRepo) {
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
512 repo = hgRepo;
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513 changelogRevisions = repo.getChangelog().getRevisionCount();
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514 }
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diff changeset
515
257
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diff changeset
516 // respects TIP
218
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517 public int at(int revisionNumber) {
257
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518 if (revisionNumber == TIP) {
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519 revisionNumber = changelogRevisions - 1;
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520 }
218
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521 if (changelog2manifest != null) {
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diff changeset
522 return changelog2manifest[revisionNumber];
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diff changeset
523 }
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diff changeset
524 return revisionNumber;
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525 }
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diff changeset
526
324
283b294d1079 Explore alternatives to access file-changelog combined history
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diff changeset
527 // XXX likely can be replaced with Revlog.RevisionInspector
218
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
528 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
529 if (changelog2manifest != null) {
220
8de327242aa0 Basic information about branches
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diff changeset
530 // next assertion is not an error, rather assumption check, which is too development-related to be explicit exception -
8de327242aa0 Basic information about branches
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diff changeset
531 // I just wonder if there are manifests that have two entries pointing to single changeset. It seems unrealistic, though -
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diff changeset
532 // changeset records one and only one manifest nodeid
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diff changeset
533 assert changelog2manifest[linkRevision] == -1 : String.format("revision:%d, link:%d, already linked to revision:%d", revisionNumber, linkRevision, changelog2manifest[linkRevision]);
218
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
534 changelog2manifest[linkRevision] = revisionNumber;
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diff changeset
535 } else {
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diff changeset
536 if (revisionNumber != linkRevision) {
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diff changeset
537 changelog2manifest = new int[changelogRevisions];
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diff changeset
538 Arrays.fill(changelog2manifest, -1);
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diff changeset
539 for (int i = 0; i < revisionNumber; changelog2manifest[i] = i, i++)
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
540 ;
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diff changeset
541 changelog2manifest[linkRevision] = revisionNumber;
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parents: 196
diff changeset
542 }
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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parents: 196
diff changeset
543 }
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parents: 196
diff changeset
544 }
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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parents: 196
diff changeset
545
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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parents: 196
diff changeset
546 public void start(int count, Callback callback, Object token) {
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diff changeset
547 if (count != changelogRevisions) {
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
548 assert count < changelogRevisions; // no idea what to do if manifest has more revisions than changelog
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diff changeset
549 // the way how manifest may contain more revisions than changelog, as I can imagine, is a result of
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
550 // some kind of an import tool (e.g. from SVN or CVS), that creates manifest and changelog independently.
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
551 // Note, it's pure guess, I didn't see such repository yet (although the way manifest revisions
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diff changeset
552 // in cpython repo are numbered makes me think aforementioned way)
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parents: 196
diff changeset
553 changelog2manifest = new int[changelogRevisions];
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
554 Arrays.fill(changelog2manifest, -1);
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
555 }
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diff changeset
556 }
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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parents: 196
diff changeset
557
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
558 public void finish(Object token) {
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diff changeset
559 if (changelog2manifest == null) {
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diff changeset
560 return;
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
561 }
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diff changeset
562 // I assume there'd be not too many revisions we don't know manifest of
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diff changeset
563 ArrayList<Integer> undefinedChangelogRevision = new ArrayList<Integer>();
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
564 for (int i = 0; i < changelog2manifest.length; i++) {
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diff changeset
565 if (changelog2manifest[i] == -1) {
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diff changeset
566 undefinedChangelogRevision.add(i);
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diff changeset
567 }
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diff changeset
568 }
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diff changeset
569 for (int u : undefinedChangelogRevision) {
354
5f9073eabf06 Propagate errors with exceptions up to a end client
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diff changeset
570 try {
366
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diff changeset
571 Nodeid manifest = repo.getChangelog().range(u, u).get(0).manifest();
390
6952d9ce97f1 Handle missing manifest revision case (brought up with Issue 23), do my best to report missing manifests when walking few manifest revisions
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parents: 385
diff changeset
572 // TODO calculate those missing effectively (e.g. cache and sort nodeids to speed lookup
366
189dc6dc1c3e Use exceptions to expose errors reading mercurial data
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 354
diff changeset
573 // right away in the #next (may refactor ParentWalker's sequential and sorted into dedicated helper and reuse here)
385
6150555eb41d HgInvalidRevisionException for svn imported repositories (changeset 0 references nullid manifest)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 372
diff changeset
574 if (manifest.isNull()) {
6150555eb41d HgInvalidRevisionException for svn imported repositories (changeset 0 references nullid manifest)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 372
diff changeset
575 repo.getContext().getLog().warn(getClass(), "Changeset %d has no associated manifest entry", u);
390
6952d9ce97f1 Handle missing manifest revision case (brought up with Issue 23), do my best to report missing manifests when walking few manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 385
diff changeset
576 // keep -1 in the changelog2manifest map.
385
6150555eb41d HgInvalidRevisionException for svn imported repositories (changeset 0 references nullid manifest)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 372
diff changeset
577 } else {
6150555eb41d HgInvalidRevisionException for svn imported repositories (changeset 0 references nullid manifest)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 372
diff changeset
578 changelog2manifest[u] = repo.getManifest().getRevisionIndex(manifest);
6150555eb41d HgInvalidRevisionException for svn imported repositories (changeset 0 references nullid manifest)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 372
diff changeset
579 }
354
5f9073eabf06 Propagate errors with exceptions up to a end client
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 326
diff changeset
580 } catch (HgInvalidControlFileException ex) {
5f9073eabf06 Propagate errors with exceptions up to a end client
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 326
diff changeset
581 // FIXME need to propagate the error up to client
5f9073eabf06 Propagate errors with exceptions up to a end client
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 326
diff changeset
582 repo.getContext().getLog().error(getClass(), ex, null);
5f9073eabf06 Propagate errors with exceptions up to a end client
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 326
diff changeset
583 }
218
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 196
diff changeset
584 }
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 196
diff changeset
585 }
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 196
diff changeset
586 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
587 }