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annotate src/com/tmate/hgkit/console/Bundle.java @ 35:6061aa826a9e

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Complete parsing of the bundle format
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 13 Jan 2011 20:02:21 +0100
parents 51bc56c0addd
children 205f9b59b400
rev   line source
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1 /*
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2 * Copyright (c) 2011 Artem Tikhomirov
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3 */
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4 package com.tmate.hgkit.console;
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5
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6 import java.io.File;
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7 import java.util.LinkedList;
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8
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9 import com.tmate.hgkit.fs.DataAccess;
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10 import com.tmate.hgkit.fs.DataAccessProvider;
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11 import com.tmate.hgkit.ll.Nodeid;
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12
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13 /**
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14 * @see http://mercurial.selenic.com/wiki/BundleFormat
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15 *
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16 * @author artem
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17 */
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18 public class Bundle {
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19
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20 public static void main(String[] args) throws Exception {
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21 File bundleFile = new File("/temp/hg/hg-bundle-a78c980749e3.tmp");
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22 DataAccessProvider dap = new DataAccessProvider();
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23 DataAccess da = dap.create(bundleFile);
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24 try {
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25 LinkedList<String> names = new LinkedList<String>();
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26 if (!da.isEmpty()) {
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27 System.out.println("Changelog group");
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28 readGroup(da);
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29 System.out.println("Manifest group");
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30 readGroup(da);
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31 while (!da.isEmpty()) {
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32 int fnameLen = da.readInt();
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33 if (fnameLen <= 4) {
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34 break; // null chunk, the last one.
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35 }
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36 byte[] fname = new byte[fnameLen - 4];
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37 da.readBytes(fname, 0, fname.length);
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38 names.add(new String(fname));
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39 System.out.println(names.getLast());
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40 readGroup(da);
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41 }
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42 }
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43 System.out.println(names.size());
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44 for (String s : names) {
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45 System.out.println(s);
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46 }
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47 } finally {
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48 da.done();
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49 }
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50 }
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52 private static void readGroup(DataAccess da) throws Exception {
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53 int len = da.readInt();
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54 while (len > 4 && !da.isEmpty()) {
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55 byte[] nb = new byte[80];
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56 da.readBytes(nb, 0, 80);
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57 Nodeid node = Nodeid.fromBinary(nb, 0);
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58 Nodeid p1 = Nodeid.fromBinary(nb, 20);
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59 Nodeid p2 = Nodeid.fromBinary(nb, 40);
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60 Nodeid cs = Nodeid.fromBinary(nb, 60);
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61 byte[] data = new byte[len-84];
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62 da.readBytes(data, 0, data.length);
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63 System.out.printf("%6d %s %s %s %s\n", len, node, p1, p2, cs);
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64 System.out.println(new String(data));
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65 len = da.isEmpty() ? 0 : da.readInt();
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66 }
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67 }
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68 }