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annotate scripts/path/pathdef.m @ 15107:03381a36f70d

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generate convenience libraries for new parse-tree and interpfcn subdirectories * src/Makefile.am (liboctinterp_la_SOURCES): Include octave.cc in the list, not $(DIST_SRC). (liboctinterp_la_LIBADD): Include octave-value/liboctave-value.la, parse-tree/libparse-tree.la, interp-core/libinterp-core.la, interpfcn/libinterpfcn.la, and corefcn/libcorefcn.la in the list. * src/interp-core/module.mk (noinst_LTLIBRARIES): Add interp-core/libinterp-core.la to the list. (interp_core_libinterp_core_la_SOURCES): New variable. * src/interpfcn/module.mk (noinst_LTLIBRARIES): Add interpfcn/libinterpfcn.la to the list. (interpfcn_libinterpfcn_la_SOURCES): New variable. * src/parse-tree/module.mk (noinst_LTLIBRARIES): Add parse-tree/libparse-tree.la to the list. (parse_tree_libparse_tree_la_SOURCES): New variable. * src/octave-value/module.mk (noinst_LTLIBRARIES): Add octave-value/liboctave-value.la to the list. (octave_value_liboctave_value_la_SOURCES): New variable.
author John W. Eaton <jwe@octave.org>
date Sun, 05 Aug 2012 09:04:30 -0400
parents b3730ed107a6
children 1c89599167a6
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1 ## Copyright (C) 2005-2012 Bill Denney
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2 ## Copyright (C) 2007-2009 Ben Abbott
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3 ##
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4 ## This file is part of Octave.
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5 ##
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6 ## Octave is free software; you can redistribute it and/or modify it
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7 ## under the terms of the GNU General Public License as published by
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8 ## the Free Software Foundation; either version 3 of the License, or (at
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9 ## your option) any later version.
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10 ##
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11 ## Octave is distributed in the hope that it will be useful, but
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12 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ## General Public License for more details.
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15 ##
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16 ## You should have received a copy of the GNU General Public License
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17 ## along with Octave; see the file COPYING. If not, see
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18 ## <http://www.gnu.org/licenses/>.
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19
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20 ## -*- texinfo -*-
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21 ## @deftypefn {Function File} {@var{val} =} pathdef ()
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22 ## Return the default path for Octave.
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23 ## The path information is extracted from one of three sources.
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24 ## The possible sources, in order of preference, are:
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25 ##
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26 ## @enumerate
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27 ## @item @file{~/.octaverc}
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28 ##
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29 ## @item @file{<octave-home>/@dots{}/<version>/m/startup/octaverc}
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30 ##
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31 ## @item Octave's path prior to changes by any octaverc.
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32 ## @end enumerate
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33 ## @seealso{path, addpath, rmpath, genpath, savepath}
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34 ## @end deftypefn
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35
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36 function val = pathdef ()
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37
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38 ## Locate the site octaverc file.
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39 pathdir = octave_config_info ("localstartupfiledir");
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40 site_octaverc = fullfile (pathdir, "octaverc");
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41
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42 ## Locate the user's ~/.octaverc file.
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43 user_octaverc = fullfile ("~", ".octaverc");
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44
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45 ## Extract the specified paths from the site and user octavercs.
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46 site_path = __extractpath__ (site_octaverc);
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47 if (exist (user_octaverc, "file"))
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48 user_path = __extractpath__ (user_octaverc);
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49 else
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50 user_path = "";
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51 endif
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52
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53 ## A path definition in the user rcfile has precedence over the site rcfile.
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54 if (! isempty (user_path))
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55 val = user_path;
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56 elseif (! isempty (site_path))
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57 val = site_path;
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58 else
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59 val = __pathorig__ ();
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60 endif
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61
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62 endfunction
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63
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64 ## Extact the path information from the script/function @var{file},
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65 ## created by @file{savepath.m}. If @var{file} is omitted,
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66 ## @file{~/.octaverc} is used. If successful, @code{__extractpath__}
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67 ## returns the path specified in @var{file}.
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68
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69 ## Author: Ben Abbott <bpabbott@mac.com>
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70
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71 function specifiedpath = __extractpath__ (savefile)
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72
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73 ## The majority of this code was borrowed from savepath.m.
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74 ## FIXME: is there some way to share the common parts instead of duplicating?
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75 ## ANSWER: Yes. Create a private directory and extract this section of code
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76 ## and place it there in a new function only visible by pathdef() and
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77 ## savepath().
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78 beginstring = "## Begin savepath auto-created section, do not edit";
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79 endstring = "## End savepath auto-created section";
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80
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81 if (nargin == 0)
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82 savefile = tilde_expand ("~/.octaverc");
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83 endif
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84
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85 ## Parse the file if it exists to see if we should replace a section
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86 ## or create a section.
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87 startline = endline = 0;
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88 filelines = {};
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89 if (exist (savefile) == 2)
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90 [fid, msg] = fopen (savefile, "rt");
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91 if (fid < 0)
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92 error ("__extractpath__: could not open savefile, %s: %s", savefile, msg);
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93 endif
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94 unwind_protect
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95 linenum = 0;
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96 while (ischar (line = fgetl (fid)))
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97 filelines{++linenum} = line;
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98 ## find the first and last lines if they exist in the file
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99 if (strcmp (line, beginstring))
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100 startline = linenum;
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101 elseif (strcmp (line, endstring))
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102 endline = linenum;
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103 endif
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104 endwhile
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105 unwind_protect_cleanup
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106 closeread = fclose (fid);
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107 if (closeread < 0)
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108 error ("__extractpath__: could not close savefile after reading, %s",
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109 savefile);
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110 endif
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111 end_unwind_protect
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112 endif
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113
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114 ## Extract the path specifiation.
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115 if (startline > endline || (startline > 0 && endline == 0))
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116 error ("__extractpath__: unable to parse file, %s", savefile);
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117 elseif (startline > 0)
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118 ## Undo doubling of single quote characters performed by savepath.
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119 specifiedpath = strrep (regexprep (cstrcat (filelines(startline:endline){:}),
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120 " *path *\\('(.*)'\\); *", "$1"),
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121 "''", "'");
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122 else
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123 specifiedpath = "";
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124 endif
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125
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126 endfunction