Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/RevlogDump.java @ 543:1e95f48d9886

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Report line index for insertion and deletion, test against 'hg diff' output
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 15 Feb 2013 15:52:03 +0100
parents e6f72c9829a6
children 47dfa0ec7e35
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.Inflater;
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33
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34 /**
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35 * Utility to test/debug/troubleshoot
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36 *
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37 * @author Artem Tikhomirov
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38 * @author TMate Software Ltd.
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39 */
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40 public class RevlogDump {
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41
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42 /**
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43 * Takes 3 command line arguments -
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44 * repository path,
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45 * path to index file (i.e. store/data/hello.c.i) in the repository (relative)
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46 * and "dumpData" whether to print actual content or just revlog headers
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47 */
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48 public static void main(String[] args) throws Exception {
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49 String repo = "/temp/hg/hello/.hg/";
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50 String filename = "store/00changelog.i";
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51 // String filename = "store/data/hello.c.i";
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52 // String filename = "store/data/docs/readme.i";
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53 System.out.println(escape("abc\0def\nzxc\tmnb"));
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54 boolean dumpDataFull = true;
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55 boolean dumpDataStats = false;
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56 if (args.length > 1) {
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57 repo = args[0];
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58 filename = args[1];
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59 dumpDataFull = args.length > 2 ? "dumpData".equals(args[2]) : false;
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60 dumpDataStats = args.length > 2 ? "dumpDataStats".equals(args[2]) : false;
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61 }
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62 final boolean needRevData = dumpDataFull || dumpDataStats;
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63 //
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64 DataInputStream dis = new DataInputStream(new BufferedInputStream(new FileInputStream(new File(repo, filename))));
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65 DataInput di = dis;
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66 dis.mark(10);
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67 int versionField = di.readInt();
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68 dis.reset();
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69 final int INLINEDATA = 1 << 16;
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70
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71 final boolean inlineData = (versionField & INLINEDATA) != 0;
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72 System.out.printf("%#8x, inline: %b\n", versionField, inlineData);
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73 FileChannel dataStream = null;
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74 if (!inlineData && needRevData) {
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75 dataStream = new FileInputStream(new File(repo, filename.substring(0, filename.length()-2) + ".d")).getChannel();
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76 }
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77 System.out.println("Index Offset Flags Packed Actual Base Rev Link Rev Parent1 Parent2 nodeid");
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78 int entryIndex = 0;
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79 while (dis.available() > 0) {
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80 long l = di.readLong();
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81 long offset = entryIndex == 0 ? 0 : (l >>> 16);
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82 int flags = (int) (l & 0x0FFFF);
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83 int compressedLen = di.readInt();
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84 int actualLen = di.readInt();
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85 int baseRevision = di.readInt();
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86 int linkRevision = di.readInt();
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87 int parent1Revision = di.readInt();
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88 int parent2Revision = di.readInt();
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89 byte[] buf = new byte[32];
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90 di.readFully(buf, 12, 20);
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91 dis.skipBytes(12);
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92 // CAN'T USE skip() here without extra precautions. E.g. I ran into situation when
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93 // buffer was 8192 and BufferedInputStream was at position 8182 before attempt to skip(12).
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94 // BIS silently skips available bytes and leaves me two extra bytes that ruin the rest of the code.
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95 System.out.printf("%4d:%14d %6X %10d %10d %10d %10d %8d %8d %040x\n", entryIndex, offset, flags, compressedLen, actualLen, baseRevision, linkRevision, parent1Revision, parent2Revision, new BigInteger(buf));
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96 String resultString;
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97 byte[] data = new byte[compressedLen];
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98 if (inlineData) {
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99 di.readFully(data);
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100 } else if (needRevData) {
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101 dataStream.position(offset);
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102 dataStream.read(ByteBuffer.wrap(data));
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103 }
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104 if (needRevData) {
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105 if (compressedLen == 0) {
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106 resultString = "<NO DATA>";
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107 } else {
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108 if (data[0] == 0x78 /* 'x' */) {
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109 Inflater zlib = new Inflater();
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110 zlib.setInput(data, 0, compressedLen);
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111 byte[] result = new byte[actualLen*2];
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112 int resultLen = zlib.inflate(result);
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113 zlib.end();
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114 resultString = buildString(result, 0, resultLen, baseRevision != entryIndex, dumpDataFull);
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115 } else if (data[0] == 0x75 /* 'u' */) {
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116 resultString = buildString(data, 1, data.length - 1, baseRevision != entryIndex, dumpDataFull);
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117 } else {
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118 resultString = buildString(data, 0, data.length, baseRevision != entryIndex, dumpDataFull);
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119 }
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120 }
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121 System.out.println(resultString);
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122 }
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123 entryIndex++;
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124 }
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125 dis.close();
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126 if (dataStream != null) {
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127 dataStream.close();
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128 }
0
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129 //
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130 }
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131
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132 private static String buildString(byte[] data, int offset, int len, boolean isPatch, boolean completeDataDump) throws IOException, UnsupportedEncodingException {
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133 if (isPatch) {
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134 DataInputStream dis = new DataInputStream(new ByteArrayInputStream(data, offset, len));
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135 StringBuilder sb = new StringBuilder();
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136 sb.append("<PATCH>:\n");
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137 while (dis.available() > 0) {
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138 int s = dis.readInt();
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139 int e = dis.readInt();
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140 int l = dis.readInt();
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141 sb.append(String.format("%d..%d, %d", s, e, l));
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142 if (completeDataDump) {
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143 byte[] src = new byte[l];
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144 dis.read(src, 0, l);
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145 sb.append(":");
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146 sb.append(escape(new String(src, 0, l, "UTF-8")));
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147 } else {
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148 dis.skipBytes(l);
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149 }
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150 sb.append('\n');
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151 }
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152 return sb.toString();
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153 } else {
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154 if (completeDataDump) {
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155 return escape(new String(data, offset, len, "UTF-8"));
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156 }
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157 return String.format("<DATA>:%d bytes", len-offset);
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158 }
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159 }
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160
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161 private static Pattern controlCharPattern = Pattern.compile("\\p{Cntrl}");
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162 // \p{Cntrl} A control character: [\x00-\x1F\x7F]
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163 private static String[] replacements = new String[33];
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164 static {
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165 for (int i = 0; i < 32; i++) {
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166 // no idea why need FOUR backslashes to get only one in printout
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167 replacements[i] = String.format("\\\\%X", i);
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168 }
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169 replacements[32] = String.format("\\\\%X", 127);
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170 }
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171 // handy to get newline-separated data printed on newlines.
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172 // set to false for non-printable data (e.g. binaries, where \n doesn't make sense)
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173 private static boolean leaveNewlineInData = true;
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174
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175 private static String escape(CharSequence possiblyWithBinary) {
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176 Matcher m = controlCharPattern.matcher(possiblyWithBinary);
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177 StringBuffer rv = new StringBuffer();
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178 while (m.find()) {
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179 char c = m.group().charAt(0);
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180 if (leaveNewlineInData && c == '\n') {
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181 continue;
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182 }
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183 int x = (int) c;
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184 m.appendReplacement(rv, replacements[x == 127 ? 32 : x]);
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185 }
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186 m.appendTail(rv);
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187 return rv.toString();
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188 }
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189 }