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annotate src/org/tmatesoft/hg/internal/FNCachePathHelper.java @ 709:497e697636fc

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Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents 5e0313485eef
children
rev   line source
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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1 /*
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2 * Copyright (c) 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 static org.tmatesoft.hg.internal.StoragePathHelper.STR_DATA;
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20
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21 import org.tmatesoft.hg.util.PathRewrite;
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22
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23 /**
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24 * Prepare filelog names to be written into fncache.
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25 *
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26 * @see http://mercurial.selenic.com/wiki/fncacheRepoFormat#The_fncache_file
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27 * @author Artem Tikhomirov
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28 * @author TMate Software Ltd.
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29 */
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30 final class FNCachePathHelper implements PathRewrite {
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31
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32 private final EncodeDirPathHelper dirPathRewrite;
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33
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34
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35 public FNCachePathHelper() {
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36 dirPathRewrite = new EncodeDirPathHelper();
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37 }
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38
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39 /**
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40 * Input: repository-relative path of a filelog, i.e. without 'data/' or 'dh/' prefix, and/or '.i'/'.d' suffix.
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41 * Output: path ready to be written into fncache file, alaways with '.i' suffix (caller is free to alter the suffix to '.d' as appropriate
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42 */
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43 public CharSequence rewrite(CharSequence path) {
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44 CharSequence p = dirPathRewrite.rewrite(path);
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45 StringBuilder result = new StringBuilder(p.length() + STR_DATA.length() + ".i".length());
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46 result.append(STR_DATA);
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47 result.append(p);
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48 result.append(".i");
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49 return result;
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50 }
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51
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52 /*
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53 * There's always 'data/' prefix, even if actual file resides under 'dh/':
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54 *
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55 * $ cat .hg/store/fncache
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56 * data/very-long-directory-name-level-1/very-long-directory-name-level-2/very-long-directory-name-level-3/file-with-longest-name-i-am-not-lazy-to-type.txt.i
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57 * $ ls .hg/store/dh/very-lon/very-lon/very-lon/
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58 * file-with-longest-name-i-am-not-lazy-to-type.txtbbd4d3327f6364027211b0cd8ca499d3d6308849.i
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59 */
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60 }