3 ###############################################################################
5 # Name : filename_helper #
6 # Author : Chris Koeritz #
7 # Rights : Copyright (C) 1996-$now by Author #
11 # Support for manipulating filenames. #
13 ###############################################################################
14 # This program is free software; you can redistribute it and/or modify it #
15 # under the terms of the GNU General Public License as published by the Free #
16 # Software Foundation; either version 2 of the License or (at your option) #
17 # any later version. See: "http://www.gruntose.com/Info/GNU/GPL.html" for a #
18 # version of the License. Please send any updates to "fred@gruntose.com". #
19 ###############################################################################
21 require "importenv.pl";
23 ############################################################################
25 #hmmm: make this lower-level, a script that is inherited by all perl scripts.
27 sub yeti_interrupt_handler {
28 die "caught an interrupt; exiting.\n";
31 # hook in a ctrl-c catcher, since that seems to be universally needed.
32 sub install_interrupt_catcher {
33 $SIG{INT} = 'yeti_interrupt_handler';
34 $SIG{QUIT} = 'yeti_interrupt_handler';
35 #print "mapped int and quit signals\n";
39 ############################################################################
41 # takes an array of filenames (each possibly containing spaces and/or
42 # wildcards) and resolves it to a useful list of actual files.
45 local(@temp_list) = @_; # the names we're given.
46 local(@to_return) = (); # the final form of the name list.
47 #print "temp list is @temp_list\n";
49 # scan through the list we're given.
50 foreach $entry (@temp_list) {
51 #print "entry is $entry\n";
52 local(@chopped_filename) = &split_filename($entry);
53 #print "chopped 0=$chopped_filename[0]\n";
54 #print "chopped 1=$chopped_filename[1]\n";
55 if ( (@chopped_filename[0] eq ".") || (@chopped_filename[0] eq "..") ) {
56 # add the simple directory name into the list.
57 push @to_return, $chopped_filename[0];
60 if (@chopped_filename[1] eq ".") {
61 # add a directory that didn't have more pattern attached.
62 push @to_return, $chopped_filename[0];
65 opendir WHERE, $chopped_filename[0]; # open the directory up.
66 local(@files_found) = readdir(WHERE);
68 foreach $possible_name (@files_found) {
69 # zoom through the list and see if we need to add it to the ones
70 # matching the passed in patterns.
71 # if ( ($possible_name eq ".") || ($possible_name eq "..") ) {
72 # # skip the directory entries.
73 # print "skipping dir entries\n";
76 # we need to process this a bit; directory patterns are different.
77 local($match) = $chopped_filename[1];
78 $match =~ s/\./\\./g; # replace periods with escaped ones.
79 $match =~ s/\*/.*/g; # replace asterisks with dot star.
80 $match =~ s/\+/\\+/g; # escape plusses.
81 $match = "^" . $match . "\$"; # make sure the whole thing matches.
82 #print "possibname is $possible_name\n";
83 if ($possible_name =~ /$match/) {
84 # this one matches so add it.
85 push @to_return, $chopped_filename[0] . $possible_name;
92 ############################################################################
94 # reports if two file names are the same file.
97 local($file1, $file2) = @_;
99 ($dev1, $ino1, $junk1) = stat $file1;
100 ($dev2, $ino2, $junk2) = stat $file2;
102 return ($dev1 == $dev2) && ($ino1 == $ino2);
105 ############################################################################
107 # splits a filename into a directory and file specification.
110 local($chewed_name) = &remove_trailing_slashes(@_);
111 $chewed_name = &canonicalize($chewed_name);
112 $chewed_name = &patch_name_for_pc($chewed_name);
113 if ($chewed_name =~ /\//) {
114 # there's a slash in there.
115 local($directory_part) = $chewed_name;
116 $directory_part =~ s/^(.*\/)[^\/]*$/\1/;
117 local($file_part) = $chewed_name;
118 $file_part =~ s/^.*\/([^\/]*)$/\1/;
119 if ($file_part eq "") {
120 # if there was no file specification, just add a non-matching spec.
123 return ($directory_part, $file_part);
124 } elsif ($chewed_name eq ".") {
126 } elsif ($chewed_name eq "..") {
129 # no slash in this name, so we fix that and also make sure we match
131 return ("./", $chewed_name);
135 ############################################################################
137 # returns the base part of the filename; this omits any directories.
140 local(@parts) = &split_filename(@_);
144 # returns the directory part of the filename.
147 local(@parts) = &split_filename(@_);
151 # returns the extension found on the filename, if any.
153 local($base) = &basename(@_);
154 #printf "base is $base\n";
156 for (local($i) = length($base) - 1; $i >= 0; $i--) {
157 #printf "char is " . substr($base, $i, 1) . "\n";
158 if (substr($base, $i, 1) eq '.') {
160 #printf "got period found is $found\n";
165 return substr($base, $found, length($base) - $found);
167 return ""; # no extension seen.
170 # returns the portion of the filename without the extension.
172 local($full) = &remove_trailing_slashes(@_);
173 $full = &canonicalize($full);
174 $full = &patch_name_for_pc($full);
175 local($ext) = &extension($full);
176 local($to_remove) = length($ext);
177 return substr($full, 0, length($full) - $to_remove);
180 ############################################################################
182 # removes all directory slashes (either '/' or '\') from the end of a string.
184 sub remove_trailing_slashes {
185 local($directory_name) = @_;
186 # start looking at the end of the string.
187 local($inspection_point) = length($directory_name) - 1;
188 while ($inspection_point > 0) {
189 # examine the last character in the string to see if it's a slash.
190 local($final_char) = substr($directory_name, $inspection_point, 1);
191 # leave the loop if it's not a slash.
192 if ( ($final_char ne "/") && ($final_char ne "\\") ) { last; }
193 chop($directory_name); # remove the slash.
194 $inspection_point--; # check the new last character.
197 return $directory_name;
200 ############################################################################
202 # returns the proper directory separator for this platform. this requires
203 # an environment variable called "OS" for non-Unix operating systems. the
204 # valid values for that are shown below.
206 sub directory_separator {
207 if ( ($OS eq "Windows_NT") || ($OS eq "Windows_95")
208 || ($OS eq "DOS") || ($OS eq "OS2") ) { return "\\"; }
212 ############################################################################
214 # these mutate the directory slashes in a directory name.
216 # the one we use most frequently; it uses the unix slash.
218 return &canonicalizer(@_, "/");
221 # one that turns names into the style native on the current platform.
222 sub native_canonicalize {
223 return &canonicalizer(@_, &directory_separator());
226 # one that explicitly uses pc style back-slashes.
227 sub pc_canonicalize {
228 return &canonicalizer(@_, "\\");
231 # one that explicitly does unix style forward slashes.
232 sub unix_canonicalize {
233 return &canonicalizer(@_, "/");
236 # similar to the normal unix version, but supports msys's weird paths.
237 sub msys_canonicalize {
238 return &canonicalizer(@_, "/", 1);
241 # similar to the msys version, but services cygwin.
242 sub cygwin_canonicalize {
243 return &canonicalizer(@_, "/", 2);
247 # this more general routine gets a directory separator passed in. it then
248 # replaces all the separators with that one.
251 local($directory_name) = $_[0];
252 local($dirsep) = $_[1];
253 local($do_funky) = $_[2];
254 #print "do funky is set to \"$do_funky\"\n";
256 #print "old dir name is \"$directory_name\"\n";
259 #somewhat abbreviated check; only catches windoze systems, not dos or os2.
260 if ($do_funky eq "1") {
261 # msys utilities version (http://www.mingw.org)
262 $directory_name =~ s/^(.):[\\\/](.*)$/\/\1\/\2/;
263 } elsif ($do_funky eq "2") {
264 # cygwin utilities version (http://www.cygwin.com)
265 $directory_name =~ s/^(.):[\\\/](.*)$/\/cygdrive\/\1\/\2/;
267 #print "new dir name is \"$directory_name\"\n";
270 # turn all the non-default separators into the default.
271 for (local($j) = 0; $j < length($directory_name); $j++) {
272 if ( (substr($directory_name, $j, 1) eq "\\")
273 || (substr($directory_name, $j, 1) eq "/") ) {
274 substr($directory_name, $j, 1) = $dirsep;
277 # remove all occurrences of double separators except for the first
278 # double set, which could be a UNC filename.
280 for (local($i) = 1; $i < length($directory_name); $i++) {
281 # iterate through the string looking for redundant separators.
282 if (substr($directory_name, $i, 1) eq $dirsep) {
283 # we found a separator character.
285 # we had just seen a separator, so this is two in a row.
286 local($head, $tail) = (substr($directory_name, 0, $i - 1),
287 substr($directory_name, $i, length($directory_name) - 1));
288 $directory_name = $head . $tail;
289 # put the name back together without this redundant character.
290 $i--; # skip back one and try again.
292 # we have now seen a separator.
296 # this character was not a separator.
300 if ($directory_name =~ /^.:$/) {
301 # fix a dos style directory that's just X:, since we don't want the
302 # current directory to be used on that device. that's too random.
303 # instead, we assume they meant the root of the drive.
304 $directory_name = $directory_name . "/";
306 return $directory_name;
309 ############################################################################
311 # fixes a PC directory name if it is only a drive letter plus colon.
313 sub patch_name_for_pc {
315 #print "name=$name\n";
316 if (length($name) != 2) { return $name; }
317 local($colon) = substr($name, 1, 1);
318 #print "colon=$colon\n";
319 # check whether the string needs patching.
321 # name is currently in feeble form of "X:"; fix it.
324 #print "returning=$name\n";
328 ############################################################################
330 # tells whether a filename is important or not. the unimportant category
331 # can usually be safely ignored or deleted.
333 sub important_filename {
334 local($name) = &basename($_[0]);
336 # these are endings that we consider unimportant. where a caret is used
337 # at the front, we will match only the whole string. double slashes are
338 # used before periods to ensure we match a real period character.
340 # "AssemblyInfo.c.*",
341 #need to regenerate these automatically.
343 local(@junk_files) = ("~", "^\\.#.*", "^\\._.*", "\\.aps", "\\.bak",
345 "\\.clw", "^cpdiff_tmp\\.txt", "^Debug", "^\\.ds_store", "^diffs\\.txt",
346 "^diff_tmp\\.txt", "\\.dsp", "\\.dsw", "\\.gid", "gmon\\.out", "\\.isr",
347 "^isconfig\\.ini", "\\.log", "^manifest.txt", "^obj",
348 "\\.obj", "\\.output", "\\.plg", "^RCa.*", "^Release", "\\.res",
349 "\\.sbr", ".*scc", "^Setup\\.dbg", "^Setup\\.inx",
350 "^Setup\\.map", "^Setup\\.obs", "^Selenium_.*Login.html",
351 "\\.stackdump", "^string1033\\.txt", "\\.suo", "\\.swp",
352 "^thumbs.db", "\\.tmp", "^trans\\.tbl", "\\.user", "_version\\.h",
353 "_version\\.rc", "^waste", "\\.ws4", "\\.wsm");
354 #this whacks too much. what was it for?
357 foreach $temp (@junk_files) {
359 if ($name =~ /${temp}/i) { return 0; }
360 # we hit a match on it being unimportant.
363 return 1; # anything else is considered important.
366 ############################################################################
369 return &patch_name_for_pc
370 (&remove_trailing_slashes
371 (&canonicalize(@_)));
374 ############################################################################
376 sub get_drive_letter {
378 if (substr($path, 0, 1) =~ /[a-zA-Z]/) {
379 if (substr($path, 1, 1) eq ":") { return substr($path, 0, 1); }
384 ############################################################################
386 sub remove_drive_letter {
388 if (substr($path, 0, 1) =~ /[a-zA-Z]/) {
389 if (substr($path, 1, 1) eq ":") { return substr($path, 2); }
394 ############################################################################
396 # these return their argument with the case flipped to lower or upper case.
400 $name =~ tr/A-Z/a-z/;
406 $name =~ tr/a-z/A-Z/;
410 ############################################################################
412 # recursively deletes a directory that is passed as the single parameter.
413 # from http://developer.novell.com/wiki/index.php/Recursive_Directory_Remove
414 sub recursive_delete {
418 opendir DIR, $dir or die "opendir $dir: $!";
420 while ($_ = readdir DIR) {
422 my $path = "$dir/$_";
423 unlink $path if -f $path;
424 recursive_delete($path) if -d $path;
427 rmdir $dir or print "error - $!";
430 ############################################################################