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annotate scripts/help/gen_doc_cache.m @ 8940:6994961bf1f4

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use doc-cache instead of DOC for doc cache file name
author John W. Eaton <jwe@octave.org>
date Mon, 09 Mar 2009 14:31:10 -0400
parents 34a821854961
children 1bf0ce0930be
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 ## Copyright (C) 2009 S�ren Hauberg
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2 ##
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3 ## This program is free software; you can redistribute it and/or modify it
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4 ## under the terms of the GNU General Public License as published by
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5 ## the Free Software Foundation; either version 3 of the License, or (at
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6 ## your option) any later version.
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7 ##
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8 ## This program is distributed in the hope that it will be useful, but
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9 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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11 ## 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; see the file COPYING. If not, see
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15 ## <http://www.gnu.org/licenses/>.
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16
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17 ## -*- texinfo -*-
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18 ## @deftypefn {Function File} gen_doc_cache (@var{out_file}, @var{directory})
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19 ## Generate documentation caches for all functions in a given directory.
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20 ##
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21 ## A documentation cache is generated for all functions in @var{directory}. The
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22 ## resulting cache is saved in the file @var{out_file}.
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23 ## The cache is used to speed up @code{lookfor}.
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24 ##
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25 ## If no directory is given (or it is the empty matrix), a cache for builtin
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26 ## operators, etc. is generated.
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27 ##
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28 ## @seealso{lookfor, path}
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29 ## @end deftypefn
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30
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31 function gen_doc_cache (out_file = "doc-cache", directory = [])
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32 ## Check input
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33 if (!ischar (out_file))
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34 print_usage ();
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35 endif
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36
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37 ## Generate cache
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38 if (isempty (directory))
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39 cache = gen_builtin_cache ();
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40 elseif (ischar (directory))
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41 cache = gen_doc_cache_in_dir (directory);
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42 else
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43 error ("gen_doc_cache: second input argument must be a string");
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44 endif
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45
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46 ## Save cache
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47 if (! isempty (cache))
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48 save ("-text", out_file, "cache");
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49 endif
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50 endfunction
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51
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52 function [text, first_sentence, status] = handle_function (f, text, format)
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53 first_sentence = "";
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54 ## Skip functions that start with __ as these shouldn't be searched by lookfor
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55 if (length (f) > 2 && all (f (1:2) == "_"))
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56 status = 1;
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57 return;
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58 endif
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59
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60 ## Take action depending on help text format
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61 switch (lower (format))
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62 case "plain text"
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63 status = 0;
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64 case "texinfo"
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65 [text, status] = __makeinfo__ (text, "plain text");
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66 case "html"
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67 [text, status] = strip_html_tags (text);
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68 otherwise
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69 status = 1;
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70 endswitch
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71
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72 ## Did we get the help text?
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73 if (status != 0 || isempty (text))
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74 warning ("gen_doc_cache: unusable help text in '%s'. Ignoring function.", f);
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75 return;
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76 endif
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77
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78 ## Get first sentence of help text
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79 first_sentence = get_first_help_sentence (f);
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80 endfunction
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81
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82 function cache = create_cache (list)
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83 cache = {};
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84
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85 ## For each function:
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86 for n = 1:length (list)
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87 f = list {n};
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88
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89 ## Get help text
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90 [text, format] = get_help_text (f);
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91
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92 [text, first_sentence, status] = handle_function (f, text, format);
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93
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94 ## Did we get the help text?
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95 if (status != 0)
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96 continue;
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97 endif
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98
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99 ## Store the help text
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100 cache (1, end+1) = f;
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101 cache (2, end) = text;
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102 cache (3, end) = first_sentence;
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103 endfor
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104 endfunction
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105
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106 function cache = gen_doc_cache_in_dir (directory)
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107 ## If 'directory' is not in the current path, add it so we search it
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108 dir_in_path = false;
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109 p = path ();
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110 idx = find (p == pathsep ());
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111 prev_idx = 1;
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112 for n = 1:length (idx)
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113 f = p (prev_idx:idx (n)-1);
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114 if (strcmp (f, directory))
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115 dir_in_path = true;
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116 break;
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117 endif
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118 prev_idx = idx (n) + 1;
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119 endfor
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120
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121 if (!dir_in_path)
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122 addpath (directory);
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123 endif
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124
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125 ## Get list of functions in directory and create cache
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126 list = __list_functions__ (directory);
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127 cache = create_cache (list);
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128
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129 if (!dir_in_path)
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130 rmpath (directory);
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131 endif
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132 endfunction
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133
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134 function cache = gen_builtin_cache ()
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135 operators = __operators__ ();
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136 keywords = __keywords__ ();
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137 builtins = __builtins__ ();
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138 list = {operators{:}, keywords{:}, builtins{:}};
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139
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140 cache = create_cache (list);
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141 endfunction
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142