1 /*
2 * Copyright (C) 2010, Google Inc.
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44 package org.eclipse.jgit.diff;
45
46 import java.text.MessageFormat;
47
48 import org.eclipse.jgit.internal.JGitText;
49 import org.eclipse.jgit.lib.Config;
50 import org.eclipse.jgit.lib.Config.SectionParser;
51 import org.eclipse.jgit.lib.ConfigConstants;
52 import org.eclipse.jgit.util.StringUtils;
53
54 /** Keeps track of diff related configuration options. */
55 public class DiffConfig {
56 /** Key for {@link Config#get(SectionParser)}. */
57 public static final Config.SectionParser<DiffConfig> KEY = new SectionParser<DiffConfig>() {
58 public DiffConfig parse(final Config cfg) {
59 return new DiffConfig(cfg);
60 }
61 };
62
63 /** Permissible values for {@code diff.renames}. */
64 public static enum RenameDetectionType {
65 /** Rename detection is disabled. */
66 FALSE,
67
68 /** Rename detection is enabled. */
69 TRUE,
70
71 /** Copies should be detected too. */
72 COPY
73 }
74
75 private final boolean noPrefix;
76
77 private final RenameDetectionType renameDetectionType;
78
79 private final int renameLimit;
80
81 private DiffConfig(final Config rc) {
82 noPrefix = rc.getBoolean(ConfigConstants.CONFIG_DIFF_SECTION,
83 ConfigConstants.CONFIG_KEY_NOPREFIX, false);
84 renameDetectionType = parseRenameDetectionType(rc.getString(
85 ConfigConstants.CONFIG_DIFF_SECTION, null, ConfigConstants.CONFIG_KEY_RENAMES));
86 renameLimit = rc.getInt(ConfigConstants.CONFIG_DIFF_SECTION,
87 ConfigConstants.CONFIG_KEY_RENAMELIMIT, 200);
88 }
89
90 /** @return true if the prefix "a/" and "b/" should be suppressed. */
91 public boolean isNoPrefix() {
92 return noPrefix;
93 }
94
95 /** @return true if rename detection is enabled by default. */
96 public boolean isRenameDetectionEnabled() {
97 return renameDetectionType != RenameDetectionType.FALSE;
98 }
99
100 /** @return type of rename detection to perform. */
101 public RenameDetectionType getRenameDetectionType() {
102 return renameDetectionType;
103 }
104
105 /** @return limit on number of paths to perform inexact rename detection. */
106 public int getRenameLimit() {
107 return renameLimit;
108 }
109
110 private static RenameDetectionType parseRenameDetectionType(
111 final String renameString) {
112 if (renameString == null)
113 return RenameDetectionType.FALSE;
114 else if (StringUtils.equalsIgnoreCase(
115 ConfigConstants.CONFIG_RENAMELIMIT_COPY, renameString)
116 || StringUtils
117 .equalsIgnoreCase(
118 ConfigConstants.CONFIG_RENAMELIMIT_COPIES,
119 renameString))
120 return RenameDetectionType.COPY;
121 else {
122 final Boolean renameBoolean = StringUtils
123 .toBooleanOrNull(renameString);
124 if (renameBoolean == null)
125 throw new IllegalArgumentException(MessageFormat.format(
126 JGitText.get().enumValueNotSupported2,
127 ConfigConstants.CONFIG_DIFF_SECTION,
128 ConfigConstants.CONFIG_KEY_RENAMES, renameString));
129 else if (renameBoolean.booleanValue())
130 return RenameDetectionType.TRUE;
131 else
132 return RenameDetectionType.FALSE;
133 }
134 }
135 }