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1 ## Copyright (C) 2005, 2006, 2007 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 (@var{file}) |
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21 ## Save the current function search path to @var{file}. If @var{file} |
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22 ## is omitted, @file{~/.octaverc} is used. If successful, |
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23 ## @code{savepath} returns 0. |
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24 ## @seealso{path, addpath, rmpath, genpath, pathdef, pathsep} |
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25 ## @end deftypefn |
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26 |
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27 ## Author: Bill Denney <bill@givebillmoney.com> |
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28 |
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29 ##PKGADD: mark_as_command savepath |
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30 |
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31 function varargout = savepath (savefile) |
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32 |
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33 retval = 1; |
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34 |
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35 beginstring = "## Begin savepath auto-created section, do not edit"; |
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36 endstring = "## End savepath auto-created section"; |
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37 |
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38 if (nargin == 0) |
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39 savefile = tilde_expand ("~/.octaverc"); |
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40 endif |
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41 |
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42 ## parse the file if it exists to see if we should replace a section |
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43 ## or create a section |
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44 startline = 0; |
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45 endline = 0; |
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46 filelines = {}; |
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47 if (exist (savefile) == 2) |
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48 ## read in all lines of the file |
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49 [fid, msg] = fopen (savefile, "rt"); |
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50 if (fid < 0) |
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51 error ("savepath: could not open savefile, %s: %s", savefile, msg); |
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52 endif |
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53 linenum = 0; |
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54 while (linenum >= 0) |
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55 result = fgetl (fid); |
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56 if (isnumeric (result)) |
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57 ## end at the end of file |
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58 linenum = -1; |
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59 else |
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60 linenum = linenum + 1; |
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61 filelines{linenum} = result; |
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62 ## find the first and last lines if they exist in the file |
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63 if (strcmp (result, beginstring)) |
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64 startline = linenum; |
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65 elseif (strcmp (result, endstring)) |
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66 endline = linenum; |
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67 endif |
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68 endif |
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69 endwhile |
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70 closeread = fclose (fid); |
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71 if (closeread < 0) |
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72 error ("savepath: could not close savefile after reading, %s", savefile); |
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73 endif |
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74 endif |
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75 |
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76 if (startline > endline || (startline > 0 && endline == 0)) |
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77 error ("savepath: unable to parse file, %s", savefile); |
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78 endif |
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79 |
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80 ## put the current savepath lines into the file |
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81 if (isempty (filelines) |
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82 || (startline == 1 && endline == length (filelines))) |
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83 ## savepath is the entire file |
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84 pre = post = {}; |
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85 elseif (endline == 0) |
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86 ## drop the savepath statements at the end of the file |
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87 pre = filelines; |
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88 post = {}; |
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89 elseif (startline == 1) |
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90 pre = {}; |
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91 post = filelines(endline+1:end); |
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92 elseif (endline == length(filelines)) |
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93 pre = filelines(1:startline-1); |
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94 post = {}; |
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95 else |
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96 ## insert in the middle |
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97 pre = filelines(1:startline-1); |
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98 post = filelines(endline+1:end); |
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99 endif |
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100 |
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101 ## write the results |
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102 [fid, msg] = fopen (savefile, "wt"); |
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103 if (fid < 0) |
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104 error ("savepath: unable to open file for writing, %s, %s", savefile, msg); |
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105 end |
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106 for i = 1:length (pre) |
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107 fprintf (fid, "%s\n", pre{i}) |
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108 endfor |
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109 |
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110 ## Use single quotes for PATH argument to avoid string escape |
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111 ## processing. |
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112 fprintf (fid, "%s\n path ('%s');\n%s\n", |
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113 beginstring, path (), endstring); |
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114 |
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115 for i = 1:length (post) |
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116 fprintf (fid, "%s\n", post{i}); |
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117 endfor |
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118 closeread = fclose (fid); |
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119 if (closeread < 0) |
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120 error ("savepath: could not close savefile after writing, %s", savefile); |
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121 endif |
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122 |
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123 retval = 0; |
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124 |
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125 if (nargout == 1) |
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126 varargout{1} = retval; |
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127 endif |
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128 |
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129 endfunction |
