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comparison src/org/tmatesoft/hg/internal/FNCachePathHelper.java @ 616:5e0313485eef

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encode directories as demanded by fncache format
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 14 May 2013 17:31:35 +0200
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615:84104448a0bf 616:5e0313485eef
1 /*
2 * Copyright (c) 2013 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@hg4j.com
16 */
17 package org.tmatesoft.hg.internal;
18
19 import static org.tmatesoft.hg.internal.StoragePathHelper.STR_DATA;
20
21 import org.tmatesoft.hg.util.PathRewrite;
22
23 /**
24 * Prepare filelog names to be written into fncache.
25 *
26 * @see http://mercurial.selenic.com/wiki/fncacheRepoFormat#The_fncache_file
27 * @author Artem Tikhomirov
28 * @author TMate Software Ltd.
29 */
30 final class FNCachePathHelper implements PathRewrite {
31
32 private final EncodeDirPathHelper dirPathRewrite;
33
34
35 public FNCachePathHelper() {
36 dirPathRewrite = new EncodeDirPathHelper();
37 }
38
39 /**
40 * Input: repository-relative path of a filelog, i.e. without 'data/' or 'dh/' prefix, and/or '.i'/'.d' suffix.
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
42 */
43 public CharSequence rewrite(CharSequence path) {
44 CharSequence p = dirPathRewrite.rewrite(path);
45 StringBuilder result = new StringBuilder(p.length() + STR_DATA.length() + ".i".length());
46 result.append(STR_DATA);
47 result.append(p);
48 result.append(".i");
49 return result;
50 }
51
52 /*
53 * There's always 'data/' prefix, even if actual file resides under 'dh/':
54 *
55 * $ cat .hg/store/fncache
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
57 * $ ls .hg/store/dh/very-lon/very-lon/very-lon/
58 * file-with-longest-name-i-am-not-lazy-to-type.txtbbd4d3327f6364027211b0cd8ca499d3d6308849.i
59 */
60 }