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annotate scripts/path/savepath.m @ 20787:40ed9b46a800

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new octave_value::string_value method with optional error message * ov.h (octave_value::string_vector): New method. ov-base.cc, ov-base.h (octave_base_value::string_vector): New default method. ov-str-mat.cc, ov-str-mat.h (octave_char_matrix_str::string_value): New method.
author John W. Eaton <jwe@octave.org>
date Thu, 08 Oct 2015 16:43:22 -0400
parents 76f67400649e
children
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rev   line source
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4197fc428c7d maint: Update copyright notices for 2015.
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1 ## Copyright (C) 2005-2015 Bill Denney
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} savepath ()
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21 ## @deftypefnx {Function File} {} savepath (@var{file})
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22 ## @deftypefnx {Function File} {@var{status} =} savepath (@dots{})
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23 ## Save the unique portion of the current function search path that is
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24 ## not set during Octave's initialization process to @var{file}.
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25 ##
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26 ## If @var{file} is omitted, Octave looks in the current directory for a
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27 ## project-specific @file{.octaverc} file in which to save the path
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28 ## information. If no such file is present then the user's configuration file
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29 ## @file{~/.octaverc} is used.
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30 ##
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31 ## If successful, @code{savepath} returns 0.
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32 ##
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33 ## The @code{savepath} function makes it simple to customize a user's
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34 ## configuration file to restore the working paths necessary for a particular
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35 ## instance of Octave. Assuming no filename is specified, Octave will
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36 ## automatically restore the saved directory paths from the appropriate
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37 ## @file{.octaverc} file when starting up. If a filename has been specified
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38 ## then the paths may be restored manually by calling @code{source @var{file}}.
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39 ## @seealso{path, addpath, rmpath, genpath, pathdef}
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40 ## @end deftypefn
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41
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42 ## Author: Bill Denney <bill@givebillmoney.com>
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43
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44 function retval = savepath (file)
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45
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46 beginstring = "## Begin savepath auto-created section, do not edit";
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47 endstring = "## End savepath auto-created section";
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48
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49 ## Use project-specific or user's .octaverc when no file specified
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50 if (nargin == 0)
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51 file = fullfile (pwd, ".octaverc");
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52 if (! exist (file, "file"))
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53 file = fullfile ("~", ".octaverc");
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54 endif
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55 endif
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56
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57 ## Read in the file
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58 [filelines, startline, endline] = getsavepath (file);
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59
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60 ## Determine where the savepath lines are placed in the file.
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61 if (isempty (filelines)
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62 || (startline == 1 && endline == length (filelines)))
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63 ## savepath is the entire file.
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64 pre = post = {};
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65 elseif (endline == 0)
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66 ## Drop the savepath statements at the end of the file.
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67 pre = filelines;
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68 post = {};
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69 elseif (startline == 1)
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70 pre = {};
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71 post = filelines(endline+1:end);
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72 elseif (endline == length (filelines))
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73 pre = filelines(1:startline-1);
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74 post = {};
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75 else
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76 ## Insert in the middle.
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77 pre = filelines(1:startline-1);
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78 post = filelines(endline+1:end);
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79 endif
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80
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81 ## Write the results.
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82 [fid, msg] = fopen (file, "wt");
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83 if (fid < 0)
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84 error ("savepath: unable to open file for writing, %s, %s", file, msg);
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85 endif
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86 unwind_protect
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87 fprintf (fid, "%s\n", pre{:});
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88
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89 ## Remove the portion of the path defined via the command line
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90 ## and/or the environment.
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91 workingpath = parsepath (path);
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92 cmd_line_path = parsepath (command_line_path ());
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93 octave_path = parsepath (getenv ("OCTAVE_PATH"));
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94 default_path = pathdef ();
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95 if (isempty (default_path))
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96 ## This occurs when running octave via run-octave. In this instance
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97 ## the entire path is specified via the command line and pathdef()
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98 ## is empty.
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99 [~, n] = setdiff (workingpath, octave_path);
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100 default_path = cmd_line_path;
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101 else
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102 [~, n] = setdiff (workingpath, union (cmd_line_path, octave_path));
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103 default_path = parsepath (default_path);
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104 endif
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105 ## This is the path we'd like to preserve when octave is run.
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106 path_to_preserve = workingpath(sort (n));
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107
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108 ## Determine the path to Octave's user and system wide packages.
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109 [pkg_user, pkg_system] = pkg ("list");
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110
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111 ## Conversion from cell array of structs to cellstr of archprefixes.
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112 pkg_path = unique (cellfun (@(elt) elt.archprefix,
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113 [pkg_user, pkg_system],
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114 "uniformoutput", false));
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115
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116 ## Rely on Octave's initialization to include the pkg path elements.
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117 if (! isempty (pkg_path))
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118 [~, n] = setdiff (path_to_preserve, strcat (pkg_path, ":"));
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119 path_to_preserve = path_to_preserve(sort (n));
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120 endif
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121
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122 ## Split the path to be saved into two groups. Those path elements that
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123 ## belong at the beginning and those at the end.
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124 if (! isempty (default_path))
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125 n1 = find (strcmp (default_path{1}, path_to_preserve));
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126 n2 = find (strcmp (default_path{end}, path_to_preserve));
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127 n_middle = round ((n1+n2)/2);
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128 [~, n] = setdiff (path_to_preserve, default_path);
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129 path_to_save = path_to_preserve(sort (n));
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130 ## Remove pwd
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131 path_to_save(strcmp (path_to_save, ["." pathsep])) = [];
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132 if (! isempty (path_to_save))
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133 n = ones (numel (path_to_save), 1);
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134 for m = 1:numel (path_to_save)
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135 n(m) = find (strcmp (path_to_save{m}, path_to_preserve));
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136 endfor
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137 path_to_save_begin = path_to_save(n <= n_middle);
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138 path_to_save_end = path_to_save(n > n_middle);
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139 else
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140 path_to_save_begin = {};
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141 path_to_save_end = {};
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142 endif
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143 else
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144 path_to_save_begin = path_to_preserve;
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145 path_to_save_end = {};
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146 endif
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147 path_to_save_begin = cell2mat (path_to_save_begin);
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148 path_to_save_end = cell2mat (path_to_save_end);
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149
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150 ## Use single quotes for PATH argument to avoid string escape
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151 ## processing. Since we are using single quotes around the arg,
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152 ## double any single quote characters found in the string.
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153 fprintf (fid, "%s\n", beginstring);
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154 if (! isempty (path_to_save_begin))
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155 n = find (path_to_save_begin != pathsep, 1, "last");
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156 fprintf (fid, " addpath ('%s', '-begin');\n",
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157 strrep (path_to_save_begin(1:n), "'", "''"));
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158 endif
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159 if (! isempty (path_to_save_end))
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160 n = find (path_to_save_end != pathsep, 1, "last");
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161 fprintf (fid, " addpath ('%s', '-end');\n",
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162 strrep (path_to_save_end(1:n), "'", "''"));
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163 endif
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164 fprintf (fid, "%s\n", endstring);
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165
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166 fprintf (fid, "%s\n", post{:});
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167 unwind_protect_cleanup
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168 status = fclose (fid);
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169 if (status < 0)
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170 error ("savepath: could not close savefile after writing, %s", file);
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171 elseif (nargin == 0)
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172 warning ("off", "backtrace", "local");
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173 warning ("Octave:savepath-local",
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174 "savepath: current path saved to %s", file);
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175 endif
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176 end_unwind_protect
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177
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178 if (nargout > 0)
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179 retval = 0;
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180 endif
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181
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182 endfunction
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183
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184 ## Convert single string of paths to cell array of paths
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185 function path_elements = parsepath (p)
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186 path_elements = strcat (ostrsplit (p, pathsep), pathsep);
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187 endfunction
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188
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189
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190 %!test
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191 %! fname = tempname ();
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192 %! status = savepath (fname);
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193 %! assert (status == 0);
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194 %! old_dir = pwd;
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195 %! unwind_protect
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196 %! cd (P_tmpdir);
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197 %! if (exist (fullfile (pwd, ".octaverc")))
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198 %! unlink (".octaverc");
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199 %! endif
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200 %! ## Create blank .octaverc file
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201 %! fid = fopen (".octaverc", "wt");
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202 %! assert (fid >= 0);
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203 %! fclose (fid);
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204 %! ## Save path into local .octaverc file
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205 %! warning ("off", "Octave:savepath-local", "local");
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206 %! status = savepath ();
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207 %! assert (status == 0);
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208 %! ## Compare old and new versions
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209 %! fid = fopen (fname, "rb");
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210 %! assert (fid >= 0);
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211 %! orig_data = fread (fid);
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212 %! fclose (fid);
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213 %! fid = fopen (".octaverc", "rb");
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214 %! assert (fid >= 0);
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215 %! new_data = fread (fid);
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216 %! fclose (fid);
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217 %! assert (orig_data, new_data);
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218 %! unwind_protect_cleanup
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219 %! cd (old_dir);
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220 %! end_unwind_protect
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221