annotate src/org/tmatesoft/hg/repo/HgManifest.java @ 426:063b0663495a

HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 28 Mar 2012 19:34:37 +0200
parents 48f993aa2f41
children 12f668401613
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.*;
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21
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22 import java.io.ByteArrayOutputStream;
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23 import java.io.IOException;
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24 import java.util.ArrayList;
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25 import java.util.Arrays;
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26
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27 import org.tmatesoft.hg.core.HgChangesetFileSneaker;
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28 import org.tmatesoft.hg.core.Nodeid;
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29 import org.tmatesoft.hg.internal.Callback;
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30 import org.tmatesoft.hg.internal.DataAccess;
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31 import org.tmatesoft.hg.internal.DigestHelper;
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32 import org.tmatesoft.hg.internal.EncodingHelper;
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33 import org.tmatesoft.hg.internal.IntMap;
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34 import org.tmatesoft.hg.internal.IterateControlMediator;
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35 import org.tmatesoft.hg.internal.Lifecycle;
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36 import org.tmatesoft.hg.internal.Pool2;
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37 import org.tmatesoft.hg.internal.RevlogStream;
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38 import org.tmatesoft.hg.util.CancelSupport;
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39 import org.tmatesoft.hg.util.Path;
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40 import org.tmatesoft.hg.util.ProgressSupport;
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41
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43 /**
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44 * Representation of Mercurial manifest file (list of file names and their revisions in a particular changeset)
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45 *
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46 * @see http://mercurial.selenic.com/wiki/Manifest
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47 * @author Artem Tikhomirov
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48 * @author TMate Software Ltd.
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49 */
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50 public final class HgManifest extends Revlog {
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51 private RevisionMapper revisionMap;
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52 private EncodingHelper encodingHelper;
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53
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54 /**
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55 * File flags recorded in manifest
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56 */
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57 public enum Flags {
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58 /**
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59 * Executable bit set
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60 */
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61 Exec,
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62 /**
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63 * Symbolic link
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64 */
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65 Link,
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66 /**
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67 * Regular file
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68 */
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69 RegularFile;
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70
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71 static Flags parse(String flags) {
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72 if ("x".equalsIgnoreCase(flags)) {
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73 return Exec;
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74 }
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75 if ("l".equalsIgnoreCase(flags)) {
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76 return Link;
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77 }
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78 if (flags == null) {
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79 return RegularFile;
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80 }
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81 throw new IllegalStateException(flags);
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82 }
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83
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84 static Flags parse(byte[] data, int start, int length) {
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85 if (length == 0) {
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86 return RegularFile;
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87 }
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88 if (length == 1) {
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89 if (data[start] == 'x') {
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90 return Exec;
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91 }
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92 if (data[start] == 'l') {
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93 return Link;
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94 }
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95 // FALL THROUGH
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96 }
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97 throw new IllegalStateException(new String(data, start, length));
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98 }
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99
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100 String nativeString() {
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101 if (this == Exec) {
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102 return "x";
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103 }
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104 if (this == Link) {
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105 return "l";
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106 }
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107 if (this == RegularFile) {
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108 return "";
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109 }
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110 throw new IllegalStateException(toString());
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111 }
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112 }
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113
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114 /*package-local*/ HgManifest(HgRepository hgRepo, RevlogStream content, EncodingHelper eh) {
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115 super(hgRepo, content);
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116 encodingHelper = eh;
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117 }
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118
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119 /**
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120 * Walks manifest revisions that correspond to specified range of changesets. The order in which manifest versions get reported
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121 * to the inspector corresponds to physical order of manifest revisions, not that of changesets (with few exceptions as noted below).
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122 * That is, for cset-manifest revision pairs:
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123 * <pre>
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124 * 3 8
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125 * 4 7
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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 (4,7), (3,8) and (5,9) to the inspector;
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129 * different order of arguments, <code>walk(5, 3, insp)</code>, makes no difference.
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130 *
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131 * <p>Physical layout of mercurial files (revlog) doesn't impose any restriction on whether manifest and changeset revisions shall go
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132 * 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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133 * as corresponding manifest revision. This situation is deemed exceptional now and what would <code>inspector</code> get depends on whether
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134 * <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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135 * <code>[start..end]</code>. Implementation does it best to report empty manifests
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136 * (<code>Inspector.begin(HgRepository.NO_REVISION, NULL, csetRevIndex);</code>
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137 * followed immediately by <code>Inspector.end(HgRepository.NO_REVISION)</code>
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138 * when <code>start</code> and/or <code>end</code> point to changeset with no associated
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139 * manifest revision. However, if changeset-manifest revision pairs look like:
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140 * <pre>
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141 * 3 8
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142 * 4 -1 (cset records null revision for manifest)
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143 * 5 9
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144 * </pre>
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145 * 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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146 * <code>Inspector.begin(); Inspector.end()</code> call pair.
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147 *
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148 * @see HgRepository#NO_REVISION
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149 * @param start changelog (not manifest!) revision to begin with
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150 * @param end changelog (not manifest!) revision to stop, inclusive.
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151 * @param inspector manifest revision visitor, can't be <code>null</code>
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152 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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153 * @throws IllegalArgumentException if inspector callback is <code>null</code>
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154 */
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155 public void walk(int start, int end, final Inspector inspector) throws HgRuntimeException, IllegalArgumentException {
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156 if (inspector == null) {
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157 throw new IllegalArgumentException();
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158 }
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159 final int csetFirst = start <= end ? start : end, csetLast = start > end ? start : end;
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160 int manifestFirst, manifestLast, i = 0;
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161 do {
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162 manifestFirst = fromChangelog(csetFirst+i);
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163 if (manifestFirst == BAD_REVISION) {
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164 inspector.begin(NO_REVISION, NULL, csetFirst+i);
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165 inspector.end(NO_REVISION);
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166 }
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167 i++;
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168 } while (manifestFirst == BAD_REVISION && csetFirst+i <= csetLast);
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169 if (manifestFirst == BAD_REVISION) {
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170 getRepo().getContext().getLog().info(getClass(), "None of changesets [%d..%d] have associated manifest revision", csetFirst, csetLast);
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171 // we ran through all revisions in [start..end] and none of them had manifest.
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172 // we reported that to inspector and proceeding is done now.
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173 return;
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174 }
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175 i = 0;
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176 do {
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177 manifestLast = fromChangelog(csetLast-i);
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178 if (manifestLast == BAD_REVISION) {
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179 inspector.begin(NO_REVISION, NULL, csetLast-i);
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180 inspector.end(NO_REVISION);
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181 }
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182 i++;
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183 } while (manifestLast == BAD_REVISION && csetLast-i >= csetFirst);
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184 if (manifestLast == BAD_REVISION) {
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185 // hmm, manifestFirst != BAD_REVISION here, hence there's i from [csetFirst..csetLast] for which manifest entry exists,
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186 // and thus it's impossible to run into manifestLast == BAD_REVISION. Nevertheless, never hurts to check.
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187 throw new HgInvalidStateException(String.format("Manifest %d-%d(!) for cset range [%d..%d] ", manifestFirst, manifestLast, csetFirst, csetLast));
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188 }
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189 if (manifestLast < manifestFirst) {
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190 // there are tool-constructed repositories that got order of changeset revisions completely different from that of manifest
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191 int x = manifestLast;
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192 manifestLast = manifestFirst;
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193 manifestFirst = x;
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194 }
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195 content.iterate(manifestFirst, manifestLast, true, new ManifestParser(inspector, encodingHelper));
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196 }
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197
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198 /**
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199 * "Sparse" iteration of the manifest, more effective than accessing revisions one by one.
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200 * <p> Inspector is invoked for each changeset revision supplied, even when there's no manifest
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201 * revision associated with a changeset (@see {@link #walk(int, int, Inspector)} for more details when it happens). Order inspector
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202 * gets invoked doesn't resemble order of changeset revisions supplied, manifest revisions are reported in the order they appear
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203 * in manifest revlog (with exception of changesets with missing manifest that may be reported in any order).
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204 *
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205 * @param inspector manifest revision visitor, can't be <code>null</code>
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206 * @param revisionIndexes local indexes of changesets to visit, non-<code>null</code>
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207 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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208 * @throws InvalidArgumentException if supplied arguments are <code>null</code>s
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209 */
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210 public void walk(final Inspector inspector, int... revisionIndexes) throws HgRuntimeException, IllegalArgumentException {
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211 if (inspector == null || revisionIndexes == null) {
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212 throw new IllegalArgumentException();
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213 }
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214 int[] manifestRevs = toManifestRevisionIndexes(revisionIndexes, inspector);
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215 content.iterate(manifestRevs, true, new ManifestParser(inspector, encodingHelper));
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216 }
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217
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218 //
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219 /**
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220 * Tells manifest revision number that corresponds to the given changeset. May return {@link HgRepository#BAD_REVISION}
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221 * if changeset has no associated manifest (cset records NULL nodeid for manifest).
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222 * @return manifest revision index, non-negative, or {@link HgRepository#BAD_REVISION}.
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223 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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224 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
390
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225 */
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226 /*package-local*/ int fromChangelog(int changesetRevisionIndex) throws HgInvalidRevisionException, HgInvalidControlFileException {
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227 if (HgInternals.wrongRevisionIndex(changesetRevisionIndex)) {
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228 throw new HgInvalidRevisionException(changesetRevisionIndex);
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229 }
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230 if (changesetRevisionIndex == HgRepository.WORKING_COPY || changesetRevisionIndex == HgRepository.BAD_REVISION) {
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231 throw new HgInvalidRevisionException("Can't use constants like WORKING_COPY or BAD_REVISION", null, changesetRevisionIndex);
257
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232 }
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233 // revisionNumber == TIP is processed by RevisionMapper
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234 if (revisionMap == null) {
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235 revisionMap = new RevisionMapper(getRepo());
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236 content.iterate(0, TIP, false, revisionMap);
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237 }
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238 return revisionMap.at(changesetRevisionIndex);
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239 }
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240
232
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241 /**
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242 * Extracts file revision as it was known at the time of given changeset.
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243 * <p>For more thorough details about file at specific changeset, use {@link HgChangesetFileSneaker}.
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244 * <p>To visit few changesets for the same file, use {@link #walkFileRevisions(Path, Inspector, int...)}
232
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245 *
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246 * @see #walkFileRevisions(Path, Inspector, int...)
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247 * @see HgChangesetFileSneaker
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248 * @param changelogRevisionIndex local changeset index
232
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249 * @param file path to file in question
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250 * @return file revision or <code>null</code> if manifest at specified revision doesn't list such file
425
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251 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
232
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252 */
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253 public Nodeid getFileRevision(int changelogRevisionIndex, final Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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254 // there's no need for HgDataFile to own this method, or get a delegate
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255 // as most of HgDataFile API is using file revision indexes, and there's easy step from file revision index to
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256 // both file revision and changeset revision index. But there's no easy way to go from changesetRevisionIndex to
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257 // file revision (the task this method solves), exept for HgFileInformer
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258 // I feel methods dealing with changeset indexes shall be more exposed in HgChangelog and HgManifest API.
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259 // TODO need tests
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260 int manifestRevIndex = fromChangelog(changelogRevisionIndex);
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261 if (manifestRevIndex == BAD_REVISION) {
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262 return null;
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263 }
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264 IntMap<Nodeid> resMap = new IntMap<Nodeid>(3);
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265 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, resMap, null);
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266 parser.walk(manifestRevIndex, content);
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267 return resMap.get(changelogRevisionIndex);
326
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268 }
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269
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270 /**
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271 * 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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272 * there are changesets that refer to that revision. Both {@link Inspector#begin(int, Nodeid, int)} and {@link Inspector#end(int)}
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273 * with appropriate values are invoked around {@link Inspector#next(Nodeid, Path, Flags)} call for the supplied file
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274 *
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275 * <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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276 * 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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277 * all {@link Inspector} methods.
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278 *
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279 * @see #getFileRevision(int, Path)
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280 * @param file path of interest
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281 * @param inspector callback to receive details about selected file
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282 * @param changelogRevisionIndexes changeset indexes to visit
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283 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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284 */
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285 public void walkFileRevisions(Path file, Inspector inspector, int... changelogRevisionIndexes) throws HgRuntimeException {
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286 if (file == null || inspector == null || changelogRevisionIndexes == null) {
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287 throw new IllegalArgumentException();
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288 }
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289 // TODO [post-1.0] need tests. There's Main#checkWalkFileRevisions that may be a starting point
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290 int[] manifestRevIndexes = toManifestRevisionIndexes(changelogRevisionIndexes, null);
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291 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, inspector);
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292 parser.walk(manifestRevIndexes, content);
232
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293 }
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294
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295 /**
417
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296 * Extract file {@link Flags flags} as they were recorded in appropriate manifest version.
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297 *
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298 * @see HgDataFile#getFlags(int)
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299 * @param changesetRevIndex changeset revision index
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300 * @param file path to look up
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301 * @return one of predefined enum values, or <code>null</code> if file was not known in the specified revision
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302 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
415
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303 */
417
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304 public Flags getFileFlags(int changesetRevIndex, Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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305 int manifestRevIdx = fromChangelog(changesetRevIndex);
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306 IntMap<Flags> resMap = new IntMap<Flags>(2);
426
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307 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, null, resMap);
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308 parser.walk(manifestRevIdx, content);
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309 return resMap.get(changesetRevIndex);
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310 }
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311
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312
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313 /**
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314 * @param changelogRevisionIndexes non-null
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315 * @param inspector may be null if reporting of missing manifests is not needed
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316 * @throws HgInvalidRevisionException if arguments specify non-existent revision index
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317 * @throws IllegalArgumentException if any index argument is not a revision index
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318 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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319 */
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320 private int[] toManifestRevisionIndexes(int[] changelogRevisionIndexes, Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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321 int[] manifestRevs = new int[changelogRevisionIndexes.length];
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322 boolean needsSort = false;
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323 int j = 0;
367
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324 for (int i = 0; i < changelogRevisionIndexes.length; i++) {
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325 final int manifestRevisionIndex = fromChangelog(changelogRevisionIndexes[i]);
403
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326 if (manifestRevisionIndex == BAD_REVISION) {
390
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327 if (inspector != null) {
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328 inspector.begin(NO_REVISION, NULL, changelogRevisionIndexes[i]);
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329 inspector.end(NO_REVISION);
390
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330 }
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331 // othrwise, ignore changeset without manifest
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332 } else {
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333 manifestRevs[j] = manifestRevisionIndex;
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334 if (j > 0 && manifestRevs[j-1] > manifestRevisionIndex) {
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335 needsSort = true;
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336 }
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337 j++;
326
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338 }
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339 }
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340 if (needsSort) {
390
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341 Arrays.sort(manifestRevs, 0, j);
326
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342 }
390
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343 if (j == manifestRevs.length) {
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344 return manifestRevs;
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345 } else {
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346 int[] rv = new int[j];
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347 //Arrays.copyOfRange
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348 System.arraycopy(manifestRevs, 0, rv, 0, j);
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349 return rv;
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350 }
326
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351 }
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352
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353 @Callback
19
40532cdc92fc Inspector (visitor) for manifest
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354 public interface Inspector {
222
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355 boolean begin(int mainfestRevision, Nodeid nid, int changelogRevision);
285
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356 /**
415
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357 * @param nid file revision
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358 * @param fname file name
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359 * @param flags one of {@link HgManifest.Flags} constants, not <code>null</code>
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360 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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361 */
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362 boolean next(Nodeid nid, Path fname, Flags flags);
424
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363 boolean end(int manifestRevision);
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364 }
424
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365
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366 /**
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367 * When Pool uses Strings directly,
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368 * ManifestParser creates new String instance with new char[] value, and does byte->char conversion.
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369 * For cpython repo, walk(0..10k), there are over 16 million filenames, of them only 3020 unique.
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370 * This means there are 15.9 million useless char[] instances and byte->char conversions
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371 *
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372 * When String (Path) is wrapped into {@link PathProxy}, there's extra overhead of byte[] representation
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373 * of the String, but these are only for unique Strings (Paths) (3020 in the example above). Besides, I save
268
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374 * useless char[] and byte->char conversions.
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375 */
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376 private static class PathProxy {
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377 private byte[] data;
268
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378 private int start;
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379 private final int hash, length;
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380 private Path result;
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381 private final EncodingHelper encHelper;
267
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382
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383 public PathProxy(byte[] data, int start, int length, EncodingHelper eh) {
267
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384 this.data = data;
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385 this.start = start;
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386 this.length = length;
412
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387 this.encHelper = eh;
267
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388
268
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389 // copy from String.hashCode(). In fact, not necessarily match result of String(data).hashCode
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390 // just need some nice algorithm here
267
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391 int h = 0;
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392 byte[] d = data;
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393 for (int i = 0, off = start, len = length; i < len; i++) {
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394 h = 31 * h + d[off++];
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395 }
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396 hash = h;
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397 }
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398
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399 @Override
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400 public boolean equals(Object obj) {
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401 if (false == obj instanceof PathProxy) {
267
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402 return false;
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403 }
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404 PathProxy o = (PathProxy) obj;
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405 if (o.result != null && result != null) {
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406 return result.equals(o.result);
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407 }
268
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408 if (o.length != length || o.hash != hash) {
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409 return false;
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410 }
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411 for (int i = 0, x = o.start, y = start; i < length; i++) {
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412 if (o.data[x++] != data[y++]) {
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413 return false;
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414 }
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415 }
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416 return true;
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417 }
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418 @Override
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419 public int hashCode() {
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420 return hash;
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421 }
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422
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423 public Path freeze() {
267
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424 if (result == null) {
412
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425 result = Path.create(encHelper.fromManifest(data, start, length));
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426 // release reference to bigger data array, make a copy of relevant part only
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427 // use original bytes, not those from String above to avoid cache misses due to different encodings
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428 byte[] d = new byte[length];
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429 System.arraycopy(data, start, d, 0, length);
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430 data = d;
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431 start = 0;
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432 }
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433 return result;
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434 }
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435 }
196
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436
312
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437 private static class ManifestParser implements RevlogStream.Inspector, Lifecycle {
196
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438 private final Inspector inspector;
304
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439 private Pool2<Nodeid> nodeidPool, thisRevPool;
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440 private final Pool2<PathProxy> fnamePool;
266
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441 private byte[] nodeidLookupBuffer = new byte[20]; // get reassigned each time new Nodeid is added to pool
312
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442 private final ProgressSupport progressHelper;
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443 private IterateControlMediator iterateControl;
412
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444 private final EncodingHelper encHelper;
262
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445
412
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446 public ManifestParser(Inspector delegate, EncodingHelper eh) {
196
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447 assert delegate != null;
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448 inspector = delegate;
412
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449 encHelper = eh;
304
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450 nodeidPool = new Pool2<Nodeid>();
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451 fnamePool = new Pool2<PathProxy>();
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452 thisRevPool = new Pool2<Nodeid>();
312
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453 progressHelper = ProgressSupport.Factory.get(delegate);
196
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454 }
268
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455
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456 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
196
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457 try {
312
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458 if (!inspector.begin(revisionNumber, new Nodeid(nodeid, true), linkRevision)) {
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diff changeset
459 iterateControl.stop();
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460 return;
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461 }
372
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462 if (!da.isEmpty()) {
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463 // although unlikely, manifest entry may be empty, when all files have been deleted from the repository
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464 Path fname = null;
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465 Flags flags = null;
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466 Nodeid nid = null;
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467 int i;
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468 byte[] data = da.byteArray();
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469 for (i = 0; i < actualLen; i++) {
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470 int x = i;
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471 for( ; data[i] != '\n' && i < actualLen; i++) {
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diff changeset
472 if (fname == null && data[i] == 0) {
412
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diff changeset
473 PathProxy px = fnamePool.unify(new PathProxy(data, x, i - x, encHelper));
372
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474 // if (cached = fnamePool.unify(px))== px then cacheMiss, else cacheHit
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diff changeset
475 // cpython 0..10k: hits: 15 989 152, misses: 3020
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diff changeset
476 fname = px.freeze();
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diff changeset
477 x = i+1;
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478 }
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479 }
372
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480 if (i < actualLen) {
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481 assert data[i] == '\n';
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482 int nodeidLen = i - x < 40 ? i-x : 40; // if > 40, there are flags
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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483 DigestHelper.ascii2bin(data, x, nodeidLen, nodeidLookupBuffer); // ignore return value as it's unlikely to have NULL in manifest
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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484 nid = new Nodeid(nodeidLookupBuffer, false); // this Nodeid is for pool lookup only, mock object
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
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485 Nodeid cached = nodeidPool.unify(nid);
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486 if (cached == nid) {
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487 // buffer now belongs to the cached nodeid
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488 nodeidLookupBuffer = new byte[20];
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489 } else {
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490 nid = cached; // use existing version, discard the lookup object
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491 } // for cpython 0..10k, cache hits are 15 973 301, vs 18871 misses.
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492 thisRevPool.record(nid); // memorize revision for the next iteration.
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493 if (nodeidLen + x < i) {
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diff changeset
494 // 'x' and 'l' for executable bits and symlinks?
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diff changeset
495 // hg --debug manifest shows 644 for each regular file in my repo
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diff changeset
496 // for cpython 0..10k, there are 4361062 flag checks, and there's only 1 unique flag
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diff changeset
497 flags = Flags.parse(data, x + nodeidLen, i-x-nodeidLen);
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498 } else {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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499 flags = Flags.RegularFile;
372
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500 }
424
6437d261048a Deprecated code removed
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501 boolean good2go = inspector.next(nid, fname, flags);
372
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diff changeset
502 if (!good2go) {
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diff changeset
503 iterateControl.stop();
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diff changeset
504 return;
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diff changeset
505 }
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diff changeset
506 }
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diff changeset
507 nid = null;
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diff changeset
508 fname = null;
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diff changeset
509 flags = null;
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510 }
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511 }
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512 if (!inspector.end(revisionNumber)) {
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diff changeset
513 iterateControl.stop();
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diff changeset
514 return;
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diff changeset
515 }
262
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516 //
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517 // keep only actual file revisions, found at this version
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518 // (next manifest is likely to refer to most of them, although in specific cases
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diff changeset
519 // like commit in another branch a lot may be useless)
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diff changeset
520 nodeidPool.clear();
304
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diff changeset
521 Pool2<Nodeid> t = nodeidPool;
262
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522 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
523 thisRevPool = t;
313
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diff changeset
524 iterateControl.checkCancelled();
312
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diff changeset
525 progressHelper.worked(1);
196
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diff changeset
526 } 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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diff changeset
527 throw new HgInvalidControlFileException("Failed reading manifest", ex, null).setRevisionIndex(revisionNumber);
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diff changeset
528 }
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diff changeset
529 }
312
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diff changeset
530
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diff changeset
531 public void start(int count, Callback callback, Object token) {
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532 CancelSupport cs = CancelSupport.Factory.get(inspector, null);
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diff changeset
533 iterateControl = new IterateControlMediator(cs, callback);
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diff changeset
534 progressHelper.start(count);
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diff changeset
535 }
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diff changeset
536
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diff changeset
537 public void finish(Object token) {
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diff changeset
538 progressHelper.done();
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diff changeset
539 }
196
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diff changeset
540 }
218
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
541
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diff changeset
542 private static class RevisionMapper implements RevlogStream.Inspector, Lifecycle {
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
543
403
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diff changeset
544 private final int changelogRevisionCount;
218
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545 private int[] changelog2manifest;
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diff changeset
546 private final HgRepository repo;
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
547
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diff changeset
548 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
549 repo = hgRepo;
403
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diff changeset
550 changelogRevisionCount = repo.getChangelog().getRevisionCount();
218
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diff changeset
551 }
047b1dec7a04 Issue 7: Correctly handle manifest and changelog with different number of (or non-matching) revisions
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diff changeset
552
403
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diff changeset
553 /**
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diff changeset
554 * Get index of manifest revision that corresponds to specified changeset
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diff changeset
555 * @param changesetRevisionIndex non-negative index of changelog revision, or {@link HgRepository#TIP}
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diff changeset
556 * @return index of manifest revision, or {@link HgRepository#BAD_REVISION} if changeset doesn't reference a valid manifest
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diff changeset
557 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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diff changeset
558 */
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559 public int at(int changesetRevisionIndex) throws HgInvalidRevisionException {
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560 if (changesetRevisionIndex == TIP) {
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561 changesetRevisionIndex = changelogRevisionCount - 1;
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562 }
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563 if (changesetRevisionIndex >= changelogRevisionCount) {
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564 throw new HgInvalidRevisionException(changesetRevisionIndex);
257
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565 }
218
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566 if (changelog2manifest != null) {
403
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567 return changelog2manifest[changesetRevisionIndex];
218
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568 }
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569 return changesetRevisionIndex;
218
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570 }
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571
324
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572 // XXX likely can be replaced with Revlog.RevisionInspector
218
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573 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
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574 if (changelog2manifest != null) {
220
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575 // next assertion is not an error, rather assumption check, which is too development-related to be explicit exception -
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576 // I just wonder if there are manifests that have two entries pointing to single changeset. It seems unrealistic, though -
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577 // changeset records one and only one manifest nodeid
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578 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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579 changelog2manifest[linkRevision] = revisionNumber;
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580 } else {
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581 if (revisionNumber != linkRevision) {
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582 changelog2manifest = new int[changelogRevisionCount];
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583 Arrays.fill(changelog2manifest, BAD_REVISION);
218
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584 for (int i = 0; i < revisionNumber; changelog2manifest[i] = i, i++)
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585 ;
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586 changelog2manifest[linkRevision] = revisionNumber;
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587 }
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588 }
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589 }
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590
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591 public void start(int count, Callback callback, Object token) {
403
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592 if (count != changelogRevisionCount) {
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593 assert count < changelogRevisionCount; // no idea what to do if manifest has more revisions than changelog
218
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594 // the way how manifest may contain more revisions than changelog, as I can imagine, is a result of
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595 // some kind of an import tool (e.g. from SVN or CVS), that creates manifest and changelog independently.
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596 // Note, it's pure guess, I didn't see such repository yet (although the way manifest revisions
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597 // in cpython repo are numbered makes me think aforementioned way)
403
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diff changeset
598 changelog2manifest = new int[changelogRevisionCount];
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599 Arrays.fill(changelog2manifest, BAD_REVISION);
218
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600 }
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diff changeset
601 }
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602
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603 public void finish(Object token) {
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604 if (changelog2manifest == null) {
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diff changeset
605 return;
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606 }
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607 // I assume there'd be not too many revisions we don't know manifest of
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608 ArrayList<Integer> undefinedChangelogRevision = new ArrayList<Integer>();
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609 for (int i = 0; i < changelog2manifest.length; i++) {
403
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610 if (changelog2manifest[i] == BAD_REVISION) {
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611 undefinedChangelogRevision.add(i);
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612 }
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613 }
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614 for (int u : undefinedChangelogRevision) {
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615 Nodeid manifest = repo.getChangelog().range(u, u).get(0).manifest();
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616 // TODO calculate those missing effectively (e.g. cache and sort nodeids to speed lookup
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617 // right away in the #next (may refactor ParentWalker's sequential and sorted into dedicated helper and reuse here)
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618 if (manifest.isNull()) {
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619 repo.getContext().getLog().warn(getClass(), "Changeset %d has no associated manifest entry", u);
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620 // keep -1 in the changelog2manifest map.
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621 } else {
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622 changelog2manifest[u] = repo.getManifest().getRevisionIndex(manifest);
354
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623 }
218
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624 }
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625 }
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626 }
415
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627
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628 /**
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629 * Look up specified file in possibly multiple manifest revisions, collect file revision and flags.
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630 */
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631 private static class FileLookupInspector implements RevlogStream.Inspector {
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632
426
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633 private final Path filename;
415
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634 private final byte[] filenameAsBytes;
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635 private final IntMap<Nodeid> csetIndex2FileRev;
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636 private final IntMap<Flags> csetIndex2Flags;
426
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637 private final Inspector delegate;
415
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638
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639 public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, IntMap<Nodeid> csetIndex2FileRevMap, IntMap<Flags> csetIndex2FlagsMap) {
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640 assert fileToLookUp != null;
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diff changeset
641 // need at least one map for the inspector to make any sense
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642 assert csetIndex2FileRevMap != null || csetIndex2FlagsMap != null;
426
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643 filename = fileToLookUp;
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644 filenameAsBytes = eh.toManifest(fileToLookUp.toString());
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645 delegate = null;
415
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646 csetIndex2FileRev = csetIndex2FileRevMap;
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647 csetIndex2Flags = csetIndex2FlagsMap;
426
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648 }
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649
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diff changeset
650 public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, Inspector delegateInspector) {
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651 assert fileToLookUp != null;
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diff changeset
652 assert delegateInspector != null;
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diff changeset
653 filename = fileToLookUp;
415
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654 filenameAsBytes = eh.toManifest(fileToLookUp.toString());
426
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655 delegate = delegateInspector;
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656 csetIndex2FileRev = null;
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657 csetIndex2Flags = null;
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658 }
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659
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diff changeset
660 void walk(int manifestRevIndex, RevlogStream content) {
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diff changeset
661 content.iterate(manifestRevIndex, manifestRevIndex, true, this);
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662 }
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diff changeset
663
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diff changeset
664 void walk(int[] manifestRevIndexes, RevlogStream content) {
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diff changeset
665 content.iterate(manifestRevIndexes, true, this);
415
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666 }
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667
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668 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
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669 ByteArrayOutputStream bos = new ByteArrayOutputStream();
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670 try {
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671 byte b;
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672 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
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673 if (b != 0) {
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674 bos.write(b);
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675 } else {
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676 byte[] byteArray = bos.toByteArray();
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677 bos.reset();
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678 if (Arrays.equals(filenameAsBytes, byteArray)) {
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679 Nodeid fileRev = null;
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680 Flags flags = null;
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681 if (csetIndex2FileRev != null || delegate != null) {
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682 byte[] nid = new byte[40];
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683 data.readBytes(nid, 0, 40);
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684 fileRev = Nodeid.fromAscii(nid, 0, 40);
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685 } else {
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686 data.skip(40);
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687 }
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688 if (csetIndex2Flags != null || delegate != null) {
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689 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
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690 bos.write(b);
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691 }
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692 if (bos.size() == 0) {
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693 flags = Flags.RegularFile;
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694 } else {
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695 flags = Flags.parse(bos.toByteArray(), 0, bos.size());
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696 }
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697
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698 }
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699 if (delegate != null) {
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700 assert flags != null;
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701 assert fileRev != null;
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702 delegate.begin(revisionNumber, Nodeid.fromBinary(nodeid, 0), linkRevision);
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703 delegate.next(fileRev, filename, flags);
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704 delegate.end(revisionNumber);
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705
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706 } else {
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707 if (csetIndex2FileRev != null) {
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708 csetIndex2FileRev.put(linkRevision, fileRev);
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709 }
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710 if (csetIndex2Flags != null) {
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711 csetIndex2Flags.put(linkRevision, flags);
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712 }
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713 }
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714 break;
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715 } else {
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716 data.skip(40);
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717 }
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718 // else skip to the end of line
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719 while (!data.isEmpty() && (b = data.readByte()) != '\n')
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720 ;
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721 }
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722 }
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723 } catch (IOException ex) {
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724 throw new HgInvalidControlFileException("Failed reading manifest", ex, null);
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725 }
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726 }
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727 }
2
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728 }