Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/RevlogDump.java @ 176:a8df7162ec75

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Extracting complete branch using remote between call to detect incoming changes is done. Arguments reorderd in remote repo to better match Hg server ideology, not my mental convenience
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 02 Apr 2011 03:01:14 +0200
parents dd525ca65de8
children e9d275fb0bc0
rev   line source
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1 /*
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2 * Copyright (c) 2010-2011 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.DataInput;
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21 import java.io.DataInputStream;
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22 import java.io.File;
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23 import java.io.FileInputStream;
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24 import java.math.BigInteger;
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25 import java.util.zip.Inflater;
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26
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27 /**
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28 * Utility to test/debug/troubleshoot
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29 *
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30 * @author Artem Tikhomirov
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31 * @author TMate Software Ltd.
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32 */
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33 public class RevlogDump {
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34
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35 /**
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36 * Takes 3 command line arguments -
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37 * repository path,
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38 * path to index file (i.e. store/data/hello.c.i) in the repository (relative)
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39 * and "dumpData" whether to print actual content or just revlog headers
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40 */
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41 public static void main(String[] args) throws Exception {
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42 String repo = "/temp/hg/hello/.hg/";
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43 String filename = "store/00changelog.i";
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44 // String filename = "store/data/hello.c.i";
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45 // String filename = "store/data/docs/readme.i";
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46 boolean dumpData = true;
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47 if (args.length > 1) {
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48 repo = args[0];
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49 filename = args[1];
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50 dumpData = args.length > 2 ? "dumpData".equals(args[2]) : false;
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51 }
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52 //
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53 DataInputStream dis = new DataInputStream(new BufferedInputStream(new FileInputStream(new File(repo + filename))));
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54 DataInput di = dis;
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55 dis.mark(10);
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56 int versionField = di.readInt();
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57 dis.reset();
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58 final int INLINEDATA = 1 << 16;
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59
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60 boolean inlineData = (versionField & INLINEDATA) != 0;
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61 System.out.printf("%#8x, inline: %b\n", versionField, inlineData);
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62 System.out.println("Index Offset Flags Packed Actual Base Rev Link Rev Parent1 Parent2 nodeid");
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63 int entryCount = 0;
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64 while (dis.available() > 0) {
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65 long l = di.readLong();
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66 long offset = l >>> 16;
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67 int flags = (int) (l & 0X0FFFF);
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68 int compressedLen = di.readInt();
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69 int actualLen = di.readInt();
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70 int baseRevision = di.readInt();
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71 int linkRevision = di.readInt();
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72 int parent1Revision = di.readInt();
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73 int parent2Revision = di.readInt();
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74 byte[] buf = new byte[32];
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75 di.readFully(buf, 12, 20);
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76 dis.skipBytes(12);
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77 // CAN'T USE skip() here without extra precautions. E.g. I ran into situation when
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78 // buffer was 8192 and BufferedInputStream was at position 8182 before attempt to skip(12).
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79 // BIS silently skips available bytes and leaves me two extra bytes that ruin the rest of the code.
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80 System.out.printf("%4d:%14d %6X %10d %10d %10d %10d %8d %8d %040x\n", entryCount, offset, flags, compressedLen, actualLen, baseRevision, linkRevision, parent1Revision, parent2Revision, new BigInteger(buf));
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81 if (inlineData) {
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82 String resultString;
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83 byte[] data = new byte[compressedLen];
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84 di.readFully(data);
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85 if (data[0] == 0x78 /* 'x' */) {
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86 Inflater zlib = new Inflater();
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87 zlib.setInput(data, 0, compressedLen);
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88 byte[] result = new byte[actualLen*2];
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89 int resultLen = zlib.inflate(result);
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90 zlib.end();
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91 resultString = new String(result, 0, resultLen, "UTF-8");
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92 } else if (data[0] == 0x75 /* 'u' */) {
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93 resultString = new String(data, 1, data.length - 1, "UTF-8");
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94 } else {
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95 resultString = new String(data);
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96 }
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97 if (dumpData) {
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98 System.out.println(resultString);
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99 }
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100 entryCount++;
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101 }
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102 }
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103 dis.close();
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104 //
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105 }
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106 }