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annotate cmdline/org/tmatesoft/hg/console/Cat.java @ 154:ba2bf656f00f

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author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 24 Feb 2011 22:16:19 +0100
parents 6b55f10ef54b
children d5268ca7715b
rev   line source
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571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
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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.console;
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19 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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21 import java.io.IOException;
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22 import java.io.OutputStream;
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23 import java.nio.ByteBuffer;
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25 import org.tmatesoft.hg.repo.HgDataFile;
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26 import org.tmatesoft.hg.repo.HgRepository;
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27 import org.tmatesoft.hg.util.ByteChannel;
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30 /**
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31 * @author Artem Tikhomirov
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32 * @author TMate Software Ltd.
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33 */
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34 public class Cat {
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35
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36 public static void main(String[] args) throws Exception {
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37 Options cmdLineOpts = Options.parse(args);
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38 HgRepository hgRepo = cmdLineOpts.findRepository();
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39 if (hgRepo.isInvalid()) {
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40 System.err.printf("Can't find repository in: %s\n", hgRepo.getLocation());
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41 return;
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42 }
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43 int rev = cmdLineOpts.getSingleInt(TIP, "-r", "--rev");
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44 OutputStreamChannel out = new OutputStreamChannel(System.out);
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45 for (String fname : cmdLineOpts.getList("")) {
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46 System.out.println(fname);
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47 HgDataFile fn = hgRepo.getFileNode(fname);
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48 if (fn.exists()) {
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49 fn.content(rev, out, true);
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50 System.out.println();
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51 } else {
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52 System.out.printf("%s not found!\n", fname);
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53 }
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54 }
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55 }
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57 private static class OutputStreamChannel implements ByteChannel {
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58
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59 private final OutputStream stream;
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61 public OutputStreamChannel(OutputStream out) {
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62 stream = out;
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63 }
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65 public int write(ByteBuffer buffer) throws IOException {
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66 int count = buffer.remaining();
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67 while(buffer.hasRemaining()) {
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68 stream.write(buffer.get());
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69 }
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70 return count;
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71 }
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72 }
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73 }