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1 ## Copyright (C) 2005 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 2, or (at your option) |
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8 ## 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, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} savepath (@var{file}) |
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22 ## This function saves the current @code{LOADPATH} to your personal |
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23 ## default initilization file or optionally the @var{file} that you |
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24 ## specify. |
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25 ## |
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26 ## It will return 0 if it was successful. |
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27 ## |
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28 ## @seealso{LOADPATH, addpath, rmpath} |
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29 ## @end deftypefn |
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30 |
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31 ## Author: Bill Denney <bill@givebillmoney.com> |
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32 |
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33 function varargout = savepath (savefile) |
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34 |
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35 retval = 1; |
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36 |
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37 beginstring = "## Begin savepath auto-created section, do not edit"; |
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38 endstring = "## End savepath auto-created section"; |
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39 |
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40 if (nargin == 0) |
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41 savefile = tilde_expand ("~/.octaverc"); |
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42 endif |
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43 |
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44 ## parse the file if it exists to see if we should replace a section |
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45 ## or create a section |
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46 startline = 0; |
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47 endline = 0; |
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48 filelines = {}; |
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49 if (exist (savefile) == 2) |
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50 ## read in all lines of the file |
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51 [fid, msg] = fopen (savefile, "rt"); |
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52 if (fid < 0) |
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53 error ("savepath: could not open savefile, %s: %s", savefile, msg); |
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54 endif |
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55 linenum = 0; |
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56 while (linenum >= 0) |
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57 result = fgetl (fid); |
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58 if (isnumeric (result)) |
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59 ## end at the end of file |
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60 linenum = -1; |
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61 else |
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62 linenum = linenum + 1; |
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63 filelines{linenum} = result; |
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64 ## find the first and last lines if they exist in the file |
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65 if (strcmp (result, beginstring)) |
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66 startline = linenum; |
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67 elseif (strcmp (result, endstring)) |
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68 endline = linenum; |
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69 endif |
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70 endif |
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71 endwhile |
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72 closeread = fclose (fid); |
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73 if (closeread < 0) |
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74 error ("savepath: could not close savefile after reading, %s", savefile); |
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75 endif |
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76 endif |
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77 |
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78 if (startline > endline || (startline > 0 && endline == 0)) |
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79 error ("savepath: unable to parse file, %s", savefile); |
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80 endif |
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81 |
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82 ## put the path into a cell array |
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83 pathlines = { beginstring, [" LOADPATH=\"", LOADPATH, "\";"], endstring }; |
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84 |
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85 ## put the current savepath lines into the file |
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86 if (isempty (filelines) |
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87 || (startline == 1 && endline == length (filelines))) |
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88 ## savepath is the entire file |
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89 pre = post = {}; |
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90 elseif (endline == 0) |
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91 ## drop the savepath statements at the end of the file |
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92 pre = filelines; |
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93 post = {}; |
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94 elseif (startline == 1) |
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95 pre = {}; |
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96 post = filelines(endline+1:end); |
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97 elseif (endline == length(filelines)) |
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98 pre = filelines(1:startline-1); |
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99 post = {}; |
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100 else |
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101 ## insert in the middle |
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102 pre = filelines(1:startline-1); |
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103 post = filelines(endline+1:end); |
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104 endif |
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105 |
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106 ## write the results |
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107 [fid, msg] = fopen (savefile, "wt"); |
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108 if (fid < 0) |
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109 error ("savepath: unable to open file for writing, %s, %s", savefile, msg); |
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110 end |
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111 for i = 1:length (pre) |
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112 fprintf (fid, "%s\n", pre{i}) |
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113 endfor |
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114 for i = 1:length (pathlines) |
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115 fprintf (fid, "%s\n", pathlines{i}); |
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116 endfor |
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117 for i = 1:length (post) |
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118 fprintf (fid, "%s\n", post{i}); |
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119 endfor |
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120 closeread = fclose (fid); |
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121 if (closeread < 0) |
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122 error ("savepath: could not close savefile after writing, %s", savefile); |
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123 endif |
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124 |
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125 retval = 0; |
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126 |
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127 if (nargout == 1) |
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128 varargout{1} = retval; |
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129 endif |
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130 |
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131 endfunction |
