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annotate src/org/tmatesoft/hg/internal/RevlogDump.java @ 709:497e697636fc

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Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents 47dfa0ec7e35
children
rev   line source
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1 /*
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2 * Copyright (c) 2010-2013 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import java.io.BufferedInputStream;
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20 import java.io.ByteArrayInputStream;
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21 import java.io.DataInput;
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22 import java.io.DataInputStream;
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23 import java.io.File;
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24 import java.io.FileInputStream;
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25 import java.io.IOException;
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26 import java.io.UnsupportedEncodingException;
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27 import java.math.BigInteger;
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28 import java.nio.ByteBuffer;
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29 import java.nio.channels.FileChannel;
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30 import java.util.regex.Matcher;
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31 import java.util.regex.Pattern;
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32 import java.util.zip.DataFormatException;
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33 import java.util.zip.Inflater;
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34
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35 /**
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36 * Utility to test/debug/troubleshoot
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37 *
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38 * @author Artem Tikhomirov
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39 * @author TMate Software Ltd.
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40 */
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41 public class RevlogDump {
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42
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43 /**
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44 * Takes 3 command line arguments -
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45 * repository path,
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46 * path to index file (i.e. store/data/hello.c.i) in the repository (relative)
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47 * and "dumpData" whether to print actual content or just revlog headers
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48 */
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49 public static void main(String[] args) throws Exception {
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50 String repo = "/temp/hg/hello/.hg/";
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51 String filename = "store/00changelog.i";
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52 // String filename = "store/data/hello.c.i";
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53 // String filename = "store/data/docs/readme.i";
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54 // System.out.println(escape("abc\0def\nzxc\tmnb"));
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55 boolean dumpDataFull = true;
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56 boolean dumpDataStats = false;
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57 if (args.length > 1) {
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58 repo = args[0];
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59 filename = args[1];
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60 dumpDataFull = args.length > 2 ? "dumpData".equals(args[2]) : false;
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61 dumpDataStats = args.length > 2 ? "dumpDataStats".equals(args[2]) : false;
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62 }
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63 final boolean needRevData = dumpDataFull || dumpDataStats;
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64 //
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65 RevlogReader rr = new RevlogReader(new File(repo, filename)).needData(needRevData);
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66 rr.init(needRevData);
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67 System.out.printf("%#8x, inline: %b\n", rr.versionField, rr.inlineData);
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68 System.out.println("Index Offset Flags Packed Actual Base Rev Link Rev Parent1 Parent2 nodeid");
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69 ByteBuffer data = null;
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70 while (rr.hasMore()) {
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71 rr.readNext();
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72 System.out.printf("%4d:%14d %6X %10d %10d %10d %10d %8d %8d %040x\n", rr.entryIndex, rr.offset, rr.flags, rr.compressedLen, rr.actualLen, rr.baseRevision, rr.linkRevision, rr.parent1Revision, rr.parent2Revision, new BigInteger(rr.nodeid));
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73 if (needRevData) {
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74 String resultString;
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75 if (rr.getDataLength() == 0) {
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76 resultString = "<NO DATA>";
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77 } else {
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78 data = ensureCapacity(data, rr.getDataLength());
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79 rr.getData(data);
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80 data.flip();
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81 resultString = buildString(data, rr.isPatch(), dumpDataFull);
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82 }
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83 if (resultString.endsWith("\n")) {
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84 System.out.print(resultString);
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85 } else {
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86 System.out.println(resultString);
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87 }
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88 }
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89 }
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90 rr.done();
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91 }
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92
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93 private static ByteBuffer ensureCapacity(ByteBuffer src, int requiredCap) {
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94 if (src == null || src.capacity() < requiredCap) {
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95 return ByteBuffer.allocate((1 + requiredCap) * 3 / 2);
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96 }
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97 src.clear();
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98 return src;
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99 }
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100
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101 private static String buildString(ByteBuffer data, boolean isPatch, boolean completeDataDump) throws IOException, UnsupportedEncodingException {
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102 if (isPatch) {
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103 DataInputStream dis = new DataInputStream(new ByteArrayInputStream(data.array(), data.arrayOffset(), data.remaining()));
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104 StringBuilder sb = new StringBuilder();
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105 sb.append("<PATCH>:\n");
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106 while (dis.available() > 0) {
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107 int s = dis.readInt();
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108 int e = dis.readInt();
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109 int l = dis.readInt();
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110 sb.append(String.format("%d..%d, %d", s, e, l));
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111 if (completeDataDump) {
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112 byte[] src = new byte[l];
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113 dis.read(src, 0, l);
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114 sb.append(":");
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115 sb.append(escape(new String(src, 0, l, "UTF-8")));
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116 } else {
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117 dis.skipBytes(l);
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118 }
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119 sb.append('\n');
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120 }
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121 return sb.toString();
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122 } else {
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123 if (completeDataDump) {
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124 return escape(new String(data.array(), data.arrayOffset(), data.remaining(), "UTF-8"));
392
656a6c1346ff Extra debug option (dumpDataStats) and patch structure decoding for RevlogDump debug utility
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diff changeset
125 }
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47dfa0ec7e35 Effective revlog patching
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diff changeset
126 return String.format("<DATA>:%d bytes", data.remaining());
392
656a6c1346ff Extra debug option (dumpDataStats) and patch structure decoding for RevlogDump debug utility
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diff changeset
127 }
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diff changeset
128 }
533
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129
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diff changeset
130 private static Pattern controlCharPattern = Pattern.compile("\\p{Cntrl}");
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diff changeset
131 // \p{Cntrl} A control character: [\x00-\x1F\x7F]
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132 private static String[] replacements = new String[33];
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133 static {
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134 for (int i = 0; i < 32; i++) {
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diff changeset
135 // no idea why need FOUR backslashes to get only one in printout
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136 replacements[i] = String.format("\\\\%X", i);
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diff changeset
137 }
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diff changeset
138 replacements[32] = String.format("\\\\%X", 127);
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diff changeset
139 }
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diff changeset
140 // handy to get newline-separated data printed on newlines.
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diff changeset
141 // set to false for non-printable data (e.g. binaries, where \n doesn't make sense)
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142 private static boolean leaveNewlineInData = true;
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143
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diff changeset
144 private static String escape(CharSequence possiblyWithBinary) {
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diff changeset
145 Matcher m = controlCharPattern.matcher(possiblyWithBinary);
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diff changeset
146 StringBuffer rv = new StringBuffer();
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diff changeset
147 while (m.find()) {
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diff changeset
148 char c = m.group().charAt(0);
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diff changeset
149 if (leaveNewlineInData && c == '\n') {
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diff changeset
150 continue;
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diff changeset
151 }
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diff changeset
152 int x = (int) c;
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diff changeset
153 m.appendReplacement(rv, replacements[x == 127 ? 32 : x]);
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diff changeset
154 }
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155 m.appendTail(rv);
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diff changeset
156 return rv.toString();
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diff changeset
157 }
583
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diff changeset
158
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diff changeset
159 public static class RevlogReader {
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diff changeset
160
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diff changeset
161 private final File file;
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diff changeset
162 private boolean needRevData;
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diff changeset
163 private DataInputStream dis;
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diff changeset
164 private boolean inlineData;
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165 public int versionField;
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166 private FileChannel dataStream;
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167 public int entryIndex;
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168 private byte[] data;
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diff changeset
169 private int dataOffset, dataLen;
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diff changeset
170 public long offset;
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diff changeset
171 public int flags;
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diff changeset
172 public int baseRevision;
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diff changeset
173 public int linkRevision;
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diff changeset
174 public int parent1Revision;
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diff changeset
175 public int parent2Revision;
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diff changeset
176 public int compressedLen;
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diff changeset
177 public int actualLen;
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diff changeset
178 public byte[] nodeid = new byte[21]; // need 1 byte in the front to be 0 to avoid negative BigInts
47dfa0ec7e35 Effective revlog patching
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diff changeset
179
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diff changeset
180 public RevlogReader(File f) {
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diff changeset
181 assert f.getName().endsWith(".i");
47dfa0ec7e35 Effective revlog patching
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diff changeset
182 file = f;
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diff changeset
183 }
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diff changeset
184
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diff changeset
185 // affects #readNext()
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diff changeset
186 public RevlogReader needData(boolean needData) {
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diff changeset
187 needRevData = needData;
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diff changeset
188 return this;
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diff changeset
189 }
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diff changeset
190
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diff changeset
191 public void init(boolean mayRequireData) throws IOException {
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diff changeset
192 dis = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));
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diff changeset
193 DataInput di = dis;
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diff changeset
194 dis.mark(10);
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diff changeset
195 versionField = di.readInt();
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diff changeset
196 dis.reset();
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diff changeset
197 final int INLINEDATA = 1 << 16;
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diff changeset
198 inlineData = (versionField & INLINEDATA) != 0;
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parents: 533
diff changeset
199
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diff changeset
200 dataStream = null;
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
201 if (!inlineData && mayRequireData) {
47dfa0ec7e35 Effective revlog patching
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diff changeset
202 String fname = file.getAbsolutePath();
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
203 dataStream = new FileInputStream(new File(fname.substring(0, fname.length()-2) + ".d")).getChannel();
47dfa0ec7e35 Effective revlog patching
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diff changeset
204 }
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
205
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diff changeset
206 entryIndex = -1;
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diff changeset
207 }
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diff changeset
208
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diff changeset
209 public void startFrom(int startEntryIndex) throws IOException {
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diff changeset
210 if (dis == null) {
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diff changeset
211 throw new IllegalStateException("Call #init() first");
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diff changeset
212 }
47dfa0ec7e35 Effective revlog patching
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diff changeset
213 if (entryIndex != -1 && startEntryIndex != 0) {
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diff changeset
214 throw new IllegalStateException("Can't seek once iteration has started");
47dfa0ec7e35 Effective revlog patching
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diff changeset
215 }
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diff changeset
216 if (dataStream == null) {
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diff changeset
217 throw new IllegalStateException("Sorry, initial seek is now supported for separate .i/.d only");
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diff changeset
218 }
47dfa0ec7e35 Effective revlog patching
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diff changeset
219 long newPos = startEntryIndex * Internals.REVLOGV1_RECORD_SIZE, actualSkip;
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
220 do {
47dfa0ec7e35 Effective revlog patching
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diff changeset
221 actualSkip = dis.skip(newPos);
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
222 if (actualSkip <= 0) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
223 throw new IllegalStateException(String.valueOf(actualSkip));
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diff changeset
224 }
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
225 newPos -= actualSkip;
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
226 } while (newPos > 0);
47dfa0ec7e35 Effective revlog patching
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diff changeset
227 entryIndex = startEntryIndex - 1;
47dfa0ec7e35 Effective revlog patching
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diff changeset
228 }
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diff changeset
229
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diff changeset
230 public boolean hasMore() throws IOException {
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diff changeset
231 return dis.available() > 0;
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diff changeset
232 }
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diff changeset
233
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diff changeset
234 public void readNext() throws IOException, DataFormatException {
47dfa0ec7e35 Effective revlog patching
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diff changeset
235 entryIndex++;
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diff changeset
236 DataInput di = dis;
47dfa0ec7e35 Effective revlog patching
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diff changeset
237 long l = di.readLong();
47dfa0ec7e35 Effective revlog patching
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diff changeset
238 offset = entryIndex == 0 ? 0 : (l >>> 16);
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
239 flags = (int) (l & 0x0FFFF);
47dfa0ec7e35 Effective revlog patching
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diff changeset
240 compressedLen = di.readInt();
47dfa0ec7e35 Effective revlog patching
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diff changeset
241 actualLen = di.readInt();
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
242 baseRevision = di.readInt();
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
243 linkRevision = di.readInt();
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
244 parent1Revision = di.readInt();
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
245 parent2Revision = di.readInt();
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parents: 533
diff changeset
246 di.readFully(nodeid, 1, 20);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
247 dis.skipBytes(12);
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diff changeset
248 // CAN'T USE skip() here without extra precautions. E.g. I ran into situation when
47dfa0ec7e35 Effective revlog patching
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parents: 533
diff changeset
249 // buffer was 8192 and BufferedInputStream was at position 8182 before attempt to skip(12).
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parents: 533
diff changeset
250 // BIS silently skips available bytes and leaves me two extra bytes that ruin the rest of the code.
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diff changeset
251 data = new byte[compressedLen];
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diff changeset
252 if (inlineData) {
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diff changeset
253 di.readFully(data);
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diff changeset
254 } else if (needRevData) {
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diff changeset
255 dataStream.position(offset);
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diff changeset
256 dataStream.read(ByteBuffer.wrap(data));
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diff changeset
257 }
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diff changeset
258 if (needRevData) {
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diff changeset
259 if (compressedLen == 0) {
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diff changeset
260 data = null;
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diff changeset
261 dataOffset = dataLen = 0;
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diff changeset
262 } else {
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diff changeset
263 if (data[0] == 0x78 /* 'x' */) {
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264 Inflater zlib = new Inflater();
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265 zlib.setInput(data, 0, compressedLen);
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266 byte[] result = new byte[actualLen * 3];
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267 int resultLen = zlib.inflate(result);
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268 zlib.end();
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269 data = result;
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270 dataOffset = 0;
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271 dataLen = resultLen;
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272 } else if (data[0] == 0x75 /* 'u' */) {
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273 dataOffset = 1;
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274 dataLen = data.length - 1;
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275 } else {
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276 dataOffset = 0;
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277 dataLen = data.length;
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278 }
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279 }
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280 }
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281 }
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282
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283 public int getDataLength() {
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284 // NOT actualLen - there are empty patch revisions (dataLen == 0, but actualLen == previous length)
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285 // NOT compressedLen - zip data is uncompressed
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286 return dataLen;
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287 }
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288
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289 public void getData(ByteBuffer bb) {
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290 assert bb.remaining() >= dataLen;
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291 bb.put(data, dataOffset, dataLen);
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292 }
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293
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294 public boolean isPatch() {
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295 assert entryIndex != -1;
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296 return baseRevision != entryIndex;
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297 }
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298
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299 public boolean isInline() {
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300 assert dis != null;
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301 return inlineData;
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302 }
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303
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304 public void done() throws IOException {
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305 dis.close();
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306 dis = null;
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307 if (dataStream != null) {
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308 dataStream.close();
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309 dataStream = null;
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310 }
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311 }
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312 }
0
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313 }