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comparison src/org/tmatesoft/hg/internal/RevlogDump.java @ 73:0d279bcc4442

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Utility for future troubleshooting
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sun, 23 Jan 2011 04:06:18 +0100
parents src/com/tmate/hgkit/console/Main.java@b01500fe2604
children 61eedab3eb3e
comparison
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72:9a03a80a0f2f 73:0d279bcc4442
1 /*
2 * Copyright (c) 2010-2011 TMate Software Ltd
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * For information on how to redistribute this software under
14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@svnkit.com
16 */
17 package org.tmatesoft.hg.internal;
18
19 import java.io.BufferedInputStream;
20 import java.io.DataInput;
21 import java.io.DataInputStream;
22 import java.io.File;
23 import java.io.FileInputStream;
24 import java.math.BigInteger;
25 import java.util.zip.Inflater;
26
27 /**
28 * Utility to test/debug/troubleshoot
29 *
30 * @author Artem Tikhomirov
31 * @author TMate Software Ltd.
32 */
33 public class RevlogDump {
34
35 /**
36 * Takes 3 command line arguments -
37 * repository path,
38 * path to index file (i.e. store/data/hello.c.i) in the repository (relative)
39 * and "dumpData" whether to print actual content or just revlog headers
40 */
41 public static void main(String[] args) throws Exception {
42 String repo = "/temp/hg/hello/.hg/";
43 String filename = "store/00changelog.i";
44 // String filename = "store/data/hello.c.i";
45 // String filename = "store/data/docs/readme.i";
46 boolean dumpData = true;
47 if (args.length > 2) {
48 repo = args[0];
49 filename = args[1];
50 dumpData = "dumpData".equals(args[2]);
51 }
52 //
53 DataInputStream dis = new DataInputStream(new BufferedInputStream(new FileInputStream(new File(repo + filename))));
54 DataInput di = dis;
55 dis.mark(10);
56 int versionField = di.readInt();
57 dis.reset();
58 final int INLINEDATA = 1 << 16;
59
60 boolean inlineData = (versionField & INLINEDATA) != 0;
61 System.out.printf("%#8x, inline: %b\n", versionField, inlineData);
62 System.out.println("Index Offset Flags Packed Actual Base Rev Link Rev Parent1 Parent2 nodeid");
63 int entryCount = 0;
64 while (dis.available() > 0) {
65 long l = di.readLong();
66 long offset = l >>> 16;
67 int flags = (int) (l & 0X0FFFF);
68 int compressedLen = di.readInt();
69 int actualLen = di.readInt();
70 int baseRevision = di.readInt();
71 int linkRevision = di.readInt();
72 int parent1Revision = di.readInt();
73 int parent2Revision = di.readInt();
74 byte[] buf = new byte[32];
75 di.readFully(buf, 12, 20);
76 dis.skip(12);
77 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));
78 if (inlineData) {
79 String resultString;
80 byte[] data = new byte[compressedLen];
81 di.readFully(data);
82 if (data[0] == 0x78 /* 'x' */) {
83 Inflater zlib = new Inflater();
84 zlib.setInput(data, 0, compressedLen);
85 byte[] result = new byte[actualLen*2];
86 int resultLen = zlib.inflate(result);
87 zlib.end();
88 resultString = new String(result, 0, resultLen, "UTF-8");
89 } else if (data[0] == 0x75 /* 'u' */) {
90 resultString = new String(data, 1, data.length - 1, "UTF-8");
91 } else {
92 resultString = new String(data);
93 }
94 if (dumpData) {
95 System.out.println(resultString);
96 }
97 entryCount++;
98 }
99 }
100 dis.close();
101 //
102 }
103 }