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annotate mde/file/paths.d @ 151:e785e98d3b78

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Updated for compatibility with tango 0.99.8.
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 04 Apr 2009 17:32:18 +0200
parents 9f035cd139c6
children
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5f90774ea1ef Applied the GNU GPL v2 to mde.
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1 /* LICENSE BLOCK
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2 Part of mde: a Modular D game-oriented Engine
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3 Copyright © 2007-2008 Diggory Hardy
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4
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5 This program is free software: you can redistribute it and/or modify it under the terms
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6 of the GNU General Public License as published by the Free Software Foundation, either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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11 See the GNU General Public License for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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15
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16 /** Resource paths module.
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17 *
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18 * Internally, most mde code using files doesn't use absolute paths but paths
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19 * relative to mde directory. Further, mergetag files are usually not read
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20 * just from one file, but are the result of merging multiple files from the
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21 * same relative paths in different directories, including the root data
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22 * directory, possibly a directory in /etc, a directory for files specific to
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23 * the user accont, and possibly other directories.
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24 *
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25 * This module transforms relative paths to absolute paths, allowing for
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26 * multiple files to be read and merged.
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27 *
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28 * The base paths from which relative files are read are slit into two groups:
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29 * data paths, and conf paths (usually the conf paths refer to a "conf"
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30 * directory within the data paths). */
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31 /* Implementation note:
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32 * All paths are stored internally as strings, rather than as an instance of FilePath/FilePath once
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33 * the FilePath has served its immediate purpose, since it's more convenient and creating new
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34 * FilePaths for adjusted paths should be no slower than mutating existing ones. */
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35 module mde.file.paths;
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37 import mde.exception;
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38 import mde.file.mergetag.Reader;
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39 import mde.file.mergetag.MTTagReader;
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40 import mde.file.mergetag.Writer;
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41 import mde.file.mergetag.MTTagWriter;
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42 import mde.file.mergetag.DataSet;
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43 import mde.file.mergetag.exception;
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44
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45 import tango.io.Console;
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46 import tango.io.FilePath;
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47 version (linux) {
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48 import tango.io.FileScan;
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49 import tango.util.container.SortedMap;
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50 import tango.sys.Environment;
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51 } else version (Windows)
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52 import tango.sys.win32.SpecialPath;
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54 import tango.util.log.Log : Log, Logger;
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55 private Logger logger;
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56 static this() {
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57 logger = Log.getLogger ("mde.file.paths");
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58 }
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59
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60 /** Order to read files in.
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61 *
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62 * Values: HIGH_LOW, LOW_HIGH, HIGH_ONLY. */
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63 enum PRIORITY : byte { HIGH_LOW, LOW_HIGH, HIGH_ONLY }
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64
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65 /** This struct has one instance for each "directory".
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66 *
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67 * It is the only item within this module that you should need to interact with.
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68 *
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69 * In the case of confDir, the user path is guaranteed to exist (as highest priority path). */
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70 struct mdeDirectory
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71 {
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72 /** Creates an MT IReader for each file (using MTMultiReader).
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73 *
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74 * Params:
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75 * file = The file path and name relative to the mdeDirectory,
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76 * without a suffix (e.g. "options").
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77 * readOrder = Read the highest priority or lowest priority files first?
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78 * For correct merging, this should be LOW_HIGH when newly-
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79 * read items override old ones (as is the case with
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80 * DefaultData) and HIGH_LOW when the first-read items
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81 * survive. Thus override order needs to be the same for each
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82 * section, except the header which is always read with
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83 * LOW_HIGH order. Alternately, for files which shouldn't be
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84 * merged where only the highest priority file should be read,
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85 * pass HIGH_ONLY.
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86 * ds = The dataset, as for mergetag. Note: all actual readers share one dataset.
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87 * rdHeader = Read the headers for each file and merge if rdHeader == true.
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88 */
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89 IReader makeMTReader (char[] file, PRIORITY readOrder, DataSet ds = null, bool rdHeader = false) {
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90 return new MTMultiReader (getFiles (file, readOrder), ds, rdHeader);
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91 }
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92
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93 /** Creates an MTTagReader for each file (using MTMultiTagReader).
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94 *
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95 * Params as for makeMTReader.
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96 */
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97 MTTagReader makeMTTagReader (char[] file, PRIORITY readOrder) {
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98 return new MTMultiTagReader (getFiles (file, readOrder));
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99 }
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100
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101 /** Creates an MT writer for file deciding on the best path to use.
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102 *
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103 * Params:
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104 * file = The file path and name relative to the mdeDirectory, without a suffix
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105 * (e.g. "options")
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106 * ds = The dataset, as for mergetag.
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107 */
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108 IWriter makeMTWriter (char[] file, DataSet ds = null)
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109 {
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110 // FIXME: use highest priority writable path
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111 return getMTWriter (paths[pathsLen-1] ~ file, ds, WriterMethod.Text);
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112 }
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113
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114 /** Creates an MTTagWriter for file. */
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115 MTTagWriter makeMTTagWriter (char[] file)
136
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
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parents: 135
diff changeset
116 {
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
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parents: 135
diff changeset
117 // FIXME: use highest priority writable path
137
9f035cd139c6 BIG commit. Major change: old Options class is gone, all content values are loaded and saved automatically. All options updated to reflect this, some changed.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 136
diff changeset
118 return getMTTagWriter (paths[pathsLen-1] ~ file);
136
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 135
diff changeset
119 }
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 135
diff changeset
120
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 135
diff changeset
121 /** Returns a string listing the file name or names (if readOrder is not
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
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parents: 135
diff changeset
122 * HIGH_ONLY and multiple matches are found), or an error message. Intended
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
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parents: 135
diff changeset
123 * for user output only. */
47
e0839643ff52 New mtcp utility and changes to paths.
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diff changeset
124 char[] getFileName (char[] file, PRIORITY readOrder)
e0839643ff52 New mtcp utility and changes to paths.
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parents: 44
diff changeset
125 {
136
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
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parents: 135
diff changeset
126 FilePath[] files;
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 135
diff changeset
127 try {
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 135
diff changeset
128 files = getFiles (file, readOrder);
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
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parents: 135
diff changeset
129 } catch (NoFileException e) {
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
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parents: 135
diff changeset
130 return e.msg;
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 135
diff changeset
131 }
47
e0839643ff52 New mtcp utility and changes to paths.
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diff changeset
132
e0839643ff52 New mtcp utility and changes to paths.
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diff changeset
133 char[] ret = files[0].toString;
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diff changeset
134 foreach (f; files[1..$])
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diff changeset
135 ret ~= ", " ~ f.toString;
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parents: 44
diff changeset
136 return ret;
e0839643ff52 New mtcp utility and changes to paths.
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diff changeset
137 }
e0839643ff52 New mtcp utility and changes to paths.
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parents: 44
diff changeset
138
53
f000d6cd0f74 Changes to paths, command line arguments and font LCD rendering.
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diff changeset
139 /// Print all paths found.
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diff changeset
140 static void printPaths () {
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diff changeset
141 Cout ("Data paths found:");
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diff changeset
142 dataDir.coutPaths;
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diff changeset
143 Cout ("\nConf paths found:");
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diff changeset
144 confDir.coutPaths;
101
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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parents: 91
diff changeset
145 Cout ("\nLog file directory:\n\t")(logDir);
135
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parents: 134
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146 Cout ("\nFont directories:");
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parents: 134
diff changeset
147 foreach (path; fontPaths)
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diff changeset
148 Cout ("\n\t")(path.toString);
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149 Cout.newline;
53
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diff changeset
150 }
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151
15
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parents:
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152 private:
67
108d123238c0 Changes to work with tango r3700 (post 0.99.6).
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parents: 63
diff changeset
153 FilePath[] getFiles (char[] filename, PRIORITY readOrder)
75
25cb7420dc91 A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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parents: 68
diff changeset
154 {
67
108d123238c0 Changes to work with tango r3700 (post 0.99.6).
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parents: 63
diff changeset
155 FilePath[] ret;
68
3a737e06dc50 Unittests: fixes and changes. Plus some doc changes.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 67
diff changeset
156
47
e0839643ff52 New mtcp utility and changes to paths.
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diff changeset
157 if (readOrder == PRIORITY.LOW_HIGH) {
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parents: 44
diff changeset
158 for (size_t i = 0; i < pathsLen; ++i) {
67
108d123238c0 Changes to work with tango r3700 (post 0.99.6).
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parents: 63
diff changeset
159 FilePath file = findFile (paths[i]~filename);
47
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parents: 44
diff changeset
160 if (file !is null)
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diff changeset
161 ret ~= file;
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diff changeset
162 }
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parents: 44
diff changeset
163 } else {
137
9f035cd139c6 BIG commit. Major change: old Options class is gone, all content values are loaded and saved automatically. All options updated to reflect this, some changed.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 136
diff changeset
164 debug assert (readOrder == PRIORITY.HIGH_LOW ||
75
25cb7420dc91 A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 68
diff changeset
165 readOrder == PRIORITY.HIGH_ONLY );
25cb7420dc91 A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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parents: 68
diff changeset
166
47
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parents: 44
diff changeset
167 for (int i = pathsLen - 1; i >= 0; --i) {
67
108d123238c0 Changes to work with tango r3700 (post 0.99.6).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 63
diff changeset
168 FilePath file = findFile (paths[i]~filename);
78
79a1809421aa Widget data saving reimplemented for the new data system. (Now grid layout widgets remember their row & column sizes.)
Diggory Hardy <diggory.hardy@gmail.com>
parents: 75
diff changeset
169 if (file !is null)
47
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parents: 44
diff changeset
170 ret ~= file;
78
79a1809421aa Widget data saving reimplemented for the new data system. (Now grid layout widgets remember their row & column sizes.)
Diggory Hardy <diggory.hardy@gmail.com>
parents: 75
diff changeset
171 if (readOrder == PRIORITY.HIGH_ONLY) break;
47
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parents: 44
diff changeset
172 }
e0839643ff52 New mtcp utility and changes to paths.
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parents: 44
diff changeset
173 }
136
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 135
diff changeset
174 if (ret is null)
4084f07f2c7a Added simpler mergetag readers and writers, with unittest.
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parents: 135
diff changeset
175 throw new NoFileException ("Unable to find the file: "~filename~"[.mtt|mtb]");
47
e0839643ff52 New mtcp utility and changes to paths.
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parents: 44
diff changeset
176 return ret;
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parents: 44
diff changeset
177 }
15
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
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parents:
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178
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parents:
diff changeset
179 // Unconditionally add a path
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parents:
diff changeset
180 void addPath (char[] path) {
107
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 106
diff changeset
181 assert (pathsLen < MAX_PATHS);
15
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
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parents:
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182 paths[pathsLen++] = path~'/';
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parents:
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183 }
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
184
18
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
185 // Test a path and add if is a folder.
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
186 bool tryPath (char[] path, bool create = false) {
107
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 106
diff changeset
187 assert (pathsLen < MAX_PATHS);
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 106
diff changeset
188 FilePath fp = FilePath (path);
18
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
189 if (fp.exists && fp.isFolder) {
15
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
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parents:
diff changeset
190 paths[pathsLen++] = path~'/';
18
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
191 return true;
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
192 } else if (create) {
56a42ec95024 Changes to Init and logging.
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parents: 17
diff changeset
193 try {
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
194 fp.create;
56a42ec95024 Changes to Init and logging.
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parents: 17
diff changeset
195 paths[pathsLen++] = fp.toString~'/';
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
196 return true;
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
197 } catch (Exception e) {
151
e785e98d3b78 Updated for compatibility with tango 0.99.8.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 137
diff changeset
198 logger.error ("Creating path {} failed:" ~ e.msg, path);
18
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
199 }
15
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
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parents:
diff changeset
200 }
18
56a42ec95024 Changes to Init and logging.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 17
diff changeset
201 return false;
15
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
202 }
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
203
53
f000d6cd0f74 Changes to paths, command line arguments and font LCD rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 47
diff changeset
204 void coutPaths () {
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parents: 47
diff changeset
205 if (pathsLen) {
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parents: 47
diff changeset
206 for (size_t i = 0; i < pathsLen; ++i)
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parents: 47
diff changeset
207 Cout ("\n\t" ~ paths[i]);
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parents: 47
diff changeset
208 } else
151
e785e98d3b78 Updated for compatibility with tango 0.99.8.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 137
diff changeset
209 Cout (" [none]");
53
f000d6cd0f74 Changes to paths, command line arguments and font LCD rendering.
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parents: 47
diff changeset
210 }
f000d6cd0f74 Changes to paths, command line arguments and font LCD rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 47
diff changeset
211
15
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
212 // Use a static array to store all possible paths with separate length counters.
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parents:
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213 // Lowest priority paths are first.
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parents:
diff changeset
214 char[][MAX_PATHS] paths;
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
215 ubyte pathsLen = 0;
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parents:
diff changeset
216 }
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
217
135
bc697a218716 Somewhat unified path lookup between linux and windows and added font paths.
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parents: 134
diff changeset
218 /** Get the actual path of a font file, or throw NoFileException if not found.
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parents: 134
diff changeset
219 *
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parents: 134
diff changeset
220 * Returns a C string (null terminated). */
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parents: 134
diff changeset
221 char[] getFontPath (char[] file) {
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parents: 134
diff changeset
222 foreach (path; fontPaths) {
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parents: 134
diff changeset
223 FilePath font = path.dup.append (file);
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parents: 134
diff changeset
224 if (font.exists && font.isFile)
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parents: 134
diff changeset
225 return font.cString;
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parents: 134
diff changeset
226 }
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parents: 134
diff changeset
227 throw new NoFileException ("Unable to find font file: "~file);
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parents: 134
diff changeset
228 }
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parents: 134
diff changeset
229
15
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
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parents:
diff changeset
230 /** These are the actual instances, one for each of the data and conf "directories". */
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parents:
diff changeset
231 mdeDirectory dataDir, confDir;
101
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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parents: 91
diff changeset
232 char[] logDir; /// Directory for log files
135
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parents: 134
diff changeset
233 FilePath[] fontPaths; /// All directories for fonts
15
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
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parents:
diff changeset
234
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
235 //BEGIN Path resolution
135
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parents: 134
diff changeset
236 /// For command line args: these paths are added if non-null, with highest priority.
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parents: 134
diff changeset
237 char[] extraDataPath, extraConfPath;
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Diggory Hardy <diggory.hardy@gmail.com>
parents: 134
diff changeset
238
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parents: 134
diff changeset
239 /** Add an extra font directory. May be called multiple times. */
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parents: 134
diff changeset
240 void addFontPath (char[] path) {
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parents: 134
diff changeset
241 FilePath fp = FilePath (path);
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parents: 134
diff changeset
242 if (fp.exists && fp.isFolder)
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parents: 134
diff changeset
243 fontPaths ~= fp;
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Diggory Hardy <diggory.hardy@gmail.com>
parents: 134
diff changeset
244 }
bc697a218716 Somewhat unified path lookup between linux and windows and added font paths.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 134
diff changeset
245
107
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 106
diff changeset
246 /** Find at least one path for each required directory. */
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247 debug (mdeUnitTest) {
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248 /** In unittest mode, add paths unittest/data and unittest/conf before init runs. */
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249 static this () {
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250 dataDir.tryPath ("unittest/data");
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251 confDir.tryPath ("unittest/conf");
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252 if (!(dataDir.pathsLen && confDir.pathsLen))
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253 throw new mdeException ("Fatal: unittest/data and unittest/conf don't both exist");
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254 // Don't bother with real paths or logDir or font dir(s) for unittest.
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255 }
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256 }
135
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257 void resolvePaths (char[] base = ".") {
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258 size_t iFP = fontPaths.length;
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259 fontPaths.length = fontPaths.length + 4;
101
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260
135
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261 version (linux) {
15
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262 // Home directory:
53
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263 char[] HOME = Environment.get("HOME", ".");
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264
135
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265 // Installation base (should contain "data" and "conf"):
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266 FilePath staticPath = findPath (false,
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267 "/usr/share/games/mde",
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268 "/usr/local/share/games/mde",
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269 base~"/data");
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270 // Path for user-adjusted files:
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271 FilePath userPath = findPath (true, HOME~"/.config/mde", HOME~"/.mde");
15
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272
135
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273 dataDir.addPath (staticPath.toString);
107
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274 confDir.tryPath (staticPath.toString ~ "/conf");
24
32eff0e01c05 Only locally-changed options are stored in user-config now. Log levels revised.
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275 confDir.tryPath ("/etc/mde");
18
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276
101
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277 // Font paths:
135
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278 auto fontP1 = FilePath("/usr/share/fonts").toList;
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279 foreach (fp1; fontP1)
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280 if (fp1.isFolder)
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281 foreach (fp2; fp1.toList)
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282 if (fp2.isFolder) {
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283 if (iFP >= fontPaths.length)
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284 fontPaths.length = fontPaths.length * 2;
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285 fontPaths[iFP++] = fp2;
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286 }
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287 } else version (Windows) {
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288 //FIXME: Get base path from registry
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289
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290 FilePath staticPath = findPath (false, base~"/data");
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291 FilePath userPath = findPath (true, getSpecialPath(CSIDL_LOCAL_APPDATA) ~ "/mde");
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292
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293 dataDir.addPath (staticPath.toString);
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294 confDir.tryPath (staticPath.toString ~ "/conf");
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295
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296 // Font path:
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297 fontPaths ~= FilePath(getSpecialPath (CSIDL_FONTS));
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298 } else {
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299 static assert (false, "Platform is not linux or Windows: no support for paths on this platform yet!");
101
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300 }
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301
135
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302 // Static data paths:
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303 dataDir.tryPath (userPath.toString ~ "/data");
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304 if (extraDataPath) dataDir.tryPath (extraDataPath);
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305
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306 // Configuration paths:
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307 confDir.tryPath (userPath.toString ~ "/conf", true);
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308 if (extraConfPath) confDir.tryPath (extraConfPath);
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309
151
e785e98d3b78 Updated for compatibility with tango 0.99.8.
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310 if (dataDir.pathsLen==0) throw new mdeException ("Fatal: no data path found!");
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311 if (confDir.pathsLen==0) throw new mdeException ("Fatal: no conf path found!");
135
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312
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313 for (int i = dataDir.pathsLen - 1; i >= 0; --i) {
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314 FilePath font = FilePath (dataDir.paths[i] ~ "fonts");
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315 if (font.exists && font.isFolder)
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316 fontPaths[iFP++] = font;
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317 }
135
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318 fontPaths.length = iFP;
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319
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320 // Logging path:
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321 logDir = userPath.toString;
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322 }
18
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323
53
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324 private {
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325 class PathException : mdeException {
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326 this(char[] msg) {
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327 super (msg);
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328 }
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329 }
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330
107
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331 // The maximum number of paths for any one "directory".
53
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332 const MAX_PATHS = 4;
134
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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diff changeset
333
53
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334 /* Try each path in succession, returning the first to exist and be a folder.
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335 * If none are valid and create is true, will try creating each in turn.
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336 * If still none are valid, throws. */
67
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337 FilePath findPath (bool create, char[][] paths ...) {
53
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338 FilePath[] fps;
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339 fps.length = paths.length;
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340 foreach (i,path; paths) {
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341 FilePath pv = new FilePath (path);
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342 if (pv.exists && pv.isFolder) return pv; // got a valid path
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343 fps[i] = pv;
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344 }
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345 if (create) { // try to create a folder, using each path in turn until succesful
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346 foreach (fp; fps) {
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diff changeset
347 try {
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348 return fp.create;
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349 }
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diff changeset
350 catch (Exception e) {}
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351 }
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352 }
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353 // no valid path...
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354 char[] msg = "Unable to find"~(create ? " or create" : "")~" a required path! The following were tried:";
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355 foreach (path; paths) msg ~= " \"" ~ path ~ '\"';
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356 throw new PathException (msg);
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357 }
134
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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358 }
53
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359 //END Path resolution
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diff changeset
360
75
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361 /// Thrown when makeMTReader couldn't find a file.
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362 class NoFileException : MTFileIOException {
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diff changeset
363 this (char[] msg) {
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diff changeset
364 super(msg);
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365 }
53
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366 }