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1 | package File::Spec::Win32; |
2 | |
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3 | use strict; |
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4 | use Cwd; |
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5 | use vars qw(@ISA); |
6 | require File::Spec::Unix; |
7 | @ISA = qw(File::Spec::Unix); |
8 | |
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9 | =head1 NAME |
10 | |
11 | File::Spec::Win32 - methods for Win32 file specs |
12 | |
13 | =head1 SYNOPSIS |
14 | |
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15 | require File::Spec::Win32; # Done internally by File::Spec if needed |
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16 | |
17 | =head1 DESCRIPTION |
18 | |
19 | See File::Spec::Unix for a documentation of the methods provided |
20 | there. This package overrides the implementation of these methods, not |
21 | the semantics. |
22 | |
23 | =over |
24 | |
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25 | =item devnull |
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26 | |
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27 | Returns a string representation of the null device. |
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28 | |
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29 | =cut |
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30 | |
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31 | sub devnull { |
32 | return "nul"; |
33 | } |
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34 | |
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35 | =item tmpdir |
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36 | |
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37 | Returns a string representation of the first existing directory |
38 | from the following list: |
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39 | |
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40 | $ENV{TMPDIR} |
41 | $ENV{TEMP} |
42 | $ENV{TMP} |
43 | /tmp |
44 | / |
45 | |
46 | =cut |
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47 | |
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48 | my $tmpdir; |
49 | sub tmpdir { |
50 | return $tmpdir if defined $tmpdir; |
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51 | my $self = shift; |
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52 | foreach (@ENV{qw(TMPDIR TEMP TMP)}, qw(/tmp /)) { |
53 | next unless defined && -d; |
54 | $tmpdir = $_; |
55 | last; |
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56 | } |
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57 | $tmpdir = '' unless defined $tmpdir; |
58 | $tmpdir = $self->canonpath($tmpdir); |
59 | return $tmpdir; |
60 | } |
61 | |
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62 | sub case_tolerant { |
63 | return 1; |
64 | } |
65 | |
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66 | sub file_name_is_absolute { |
67 | my ($self,$file) = @_; |
68 | return scalar($file =~ m{^([a-z]:)?[\\/]}i); |
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69 | } |
70 | |
71 | =item catfile |
72 | |
73 | Concatenate one or more directory names and a filename to form a |
74 | complete path ending with a filename |
75 | |
76 | =cut |
77 | |
78 | sub catfile { |
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79 | my $self = shift; |
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80 | my $file = pop @_; |
81 | return $file unless @_; |
82 | my $dir = $self->catdir(@_); |
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83 | $dir .= "\\" unless substr($dir,-1) eq "\\"; |
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84 | return $dir.$file; |
85 | } |
86 | |
87 | sub path { |
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88 | my $path = $ENV{'PATH'} || $ENV{'Path'} || $ENV{'path'}; |
89 | my @path = split(';',$path); |
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90 | foreach (@path) { $_ = '.' if $_ eq '' } |
91 | return @path; |
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92 | } |
93 | |
94 | =item canonpath |
95 | |
96 | No physical check on the filesystem, but a logical cleanup of a |
97 | path. On UNIX eliminated successive slashes and successive "/.". |
98 | |
99 | =cut |
100 | |
101 | sub canonpath { |
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102 | my ($self,$path) = @_; |
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103 | $path =~ s/^([a-z]:)/\u$1/; |
104 | $path =~ s|/|\\|g; |
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105 | $path =~ s|([^\\])\\+|$1\\|g; # xx////xx -> xx/xx |
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106 | $path =~ s|(\\\.)+\\|\\|g; # xx/././xx -> xx/xx |
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107 | $path =~ s|^(\.\\)+|| unless $path eq ".\\"; # ./xx -> xx |
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108 | $path =~ s|\\$|| |
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109 | unless $path =~ m#^([A-Z]:)?\\$#; # xx/ -> xx |
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110 | return $path; |
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111 | } |
112 | |
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113 | =item splitpath |
114 | |
115 | ($volume,$directories,$file) = File::Spec->splitpath( $path ); |
116 | ($volume,$directories,$file) = File::Spec->splitpath( $path, $no_file ); |
117 | |
118 | Splits a path in to volume, directory, and filename portions. Assumes that |
119 | the last file is a path unless the path ends in '\\', '\\.', '\\..' |
120 | or $no_file is true. On Win32 this means that $no_file true makes this return |
121 | ( $volume, $path, undef ). |
122 | |
123 | Separators accepted are \ and /. |
124 | |
125 | Volumes can be drive letters or UNC sharenames (\\server\share). |
126 | |
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127 | The results can be passed to L</catpath> to get back a path equivalent to |
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128 | (usually identical to) the original path. |
129 | |
130 | =cut |
131 | |
132 | sub splitpath { |
133 | my ($self,$path, $nofile) = @_; |
134 | my ($volume,$directory,$file) = ('','',''); |
135 | if ( $nofile ) { |
136 | $path =~ |
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137 | m{^( (?:[a-zA-Z]:|(?:\\\\|//)[^\\/]+[\\/][^\\/]+)? ) |
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138 | (.*) |
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139 | }x; |
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140 | $volume = $1; |
141 | $directory = $2; |
142 | } |
143 | else { |
144 | $path =~ |
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145 | m{^ ( (?: [a-zA-Z]: | |
146 | (?:\\\\|//)[^\\/]+[\\/][^\\/]+ |
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147 | )? |
148 | ) |
149 | ( (?:.*[\\\\/](?:\.\.?$)?)? ) |
150 | (.*) |
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151 | }x; |
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152 | $volume = $1; |
153 | $directory = $2; |
154 | $file = $3; |
155 | } |
156 | |
157 | return ($volume,$directory,$file); |
158 | } |
159 | |
160 | |
161 | =item splitdir |
162 | |
163 | The opposite of L</catdir()>. |
164 | |
165 | @dirs = File::Spec->splitdir( $directories ); |
166 | |
167 | $directories must be only the directory portion of the path on systems |
168 | that have the concept of a volume or that have path syntax that differentiates |
169 | files from directories. |
170 | |
171 | Unlike just splitting the directories on the separator, leading empty and |
172 | trailing directory entries can be returned, because these are significant |
173 | on some OSs. So, |
174 | |
175 | File::Spec->splitdir( "/a/b/c" ); |
176 | |
177 | Yields: |
178 | |
179 | ( '', 'a', 'b', '', 'c', '' ) |
180 | |
181 | =cut |
182 | |
183 | sub splitdir { |
184 | my ($self,$directories) = @_ ; |
185 | # |
186 | # split() likes to forget about trailing null fields, so here we |
187 | # check to be sure that there will not be any before handling the |
188 | # simple case. |
189 | # |
190 | if ( $directories !~ m|[\\/]$| ) { |
191 | return split( m|[\\/]|, $directories ); |
192 | } |
193 | else { |
194 | # |
195 | # since there was a trailing separator, add a file name to the end, |
196 | # then do the split, then replace it with ''. |
197 | # |
198 | my( @directories )= split( m|[\\/]|, "${directories}dummy" ) ; |
199 | $directories[ $#directories ]= '' ; |
200 | return @directories ; |
201 | } |
202 | } |
203 | |
204 | |
205 | =item catpath |
206 | |
207 | Takes volume, directory and file portions and returns an entire path. Under |
208 | Unix, $volume is ignored, and this is just like catfile(). On other OSs, |
209 | the $volume become significant. |
210 | |
211 | =cut |
212 | |
213 | sub catpath { |
214 | my ($self,$volume,$directory,$file) = @_; |
215 | |
216 | # If it's UNC, make sure the glue separator is there, reusing |
217 | # whatever separator is first in the $volume |
218 | $volume .= $1 |
219 | if ( $volume =~ m@^([\\/])[\\/][^\\/]+[\\/][^\\/]+$@ && |
220 | $directory =~ m@^[^\\/]@ |
221 | ) ; |
222 | |
223 | $volume .= $directory ; |
224 | |
225 | # If the volume is not just A:, make sure the glue separator is |
226 | # there, reusing whatever separator is first in the $volume if possible. |
227 | if ( $volume !~ m@^[a-zA-Z]:$@ && |
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228 | $volume =~ m@[^\\/]$@ && |
229 | $file =~ m@[^\\/]@ |
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230 | ) { |
231 | $volume =~ m@([\\/])@ ; |
232 | my $sep = $1 ? $1 : '\\' ; |
233 | $volume .= $sep ; |
234 | } |
235 | |
236 | $volume .= $file ; |
237 | |
238 | return $volume ; |
239 | } |
240 | |
241 | |
242 | =item abs2rel |
243 | |
244 | Takes a destination path and an optional base path returns a relative path |
245 | from the base path to the destination path: |
246 | |
247 | $rel_path = File::Spec->abs2rel( $destination ) ; |
248 | $rel_path = File::Spec->abs2rel( $destination, $base ) ; |
249 | |
250 | If $base is not present or '', then L</cwd()> is used. If $base is relative, |
251 | then it is converted to absolute form using L</rel2abs()>. This means that it |
252 | is taken to be relative to L<cwd()>. |
253 | |
254 | On systems with the concept of a volume, this assumes that both paths |
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255 | are on the $destination volume, and ignores the $base volume. |
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256 | |
257 | On systems that have a grammar that indicates filenames, this ignores the |
258 | $base filename as well. Otherwise all path components are assumed to be |
259 | directories. |
260 | |
261 | If $path is relative, it is converted to absolute form using L</rel2abs()>. |
262 | This means that it is taken to be relative to L</cwd()>. |
263 | |
264 | Based on code written by Shigio Yamaguchi. |
265 | |
266 | No checks against the filesystem are made. |
267 | |
268 | =cut |
269 | |
270 | sub abs2rel { |
271 | my($self,$path,$base) = @_; |
272 | |
273 | # Clean up $path |
274 | if ( ! $self->file_name_is_absolute( $path ) ) { |
275 | $path = $self->rel2abs( $path ) ; |
276 | } |
277 | else { |
278 | $path = $self->canonpath( $path ) ; |
279 | } |
280 | |
281 | # Figure out the effective $base and clean it up. |
282 | if ( ! $self->file_name_is_absolute( $base ) ) { |
283 | $base = $self->rel2abs( $base ) ; |
284 | } |
285 | elsif ( !defined( $base ) || $base eq '' ) { |
286 | $base = cwd() ; |
287 | } |
288 | else { |
289 | $base = $self->canonpath( $base ) ; |
290 | } |
291 | |
292 | # Split up paths |
293 | my ( $path_volume, $path_directories, $path_file ) = |
294 | $self->splitpath( $path, 1 ) ; |
295 | |
296 | my ( undef, $base_directories, undef ) = |
297 | $self->splitpath( $base, 1 ) ; |
298 | |
299 | # Now, remove all leading components that are the same |
300 | my @pathchunks = $self->splitdir( $path_directories ); |
301 | my @basechunks = $self->splitdir( $base_directories ); |
302 | |
303 | while ( @pathchunks && |
304 | @basechunks && |
305 | lc( $pathchunks[0] ) eq lc( $basechunks[0] ) |
306 | ) { |
307 | shift @pathchunks ; |
308 | shift @basechunks ; |
309 | } |
310 | |
311 | # No need to catdir, we know these are well formed. |
312 | $path_directories = CORE::join( '\\', @pathchunks ); |
313 | $base_directories = CORE::join( '\\', @basechunks ); |
314 | |
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315 | # $base_directories now contains the directories the resulting relative |
316 | # path must ascend out of before it can descend to $path_directory. So, |
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317 | # replace all names with $parentDir |
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318 | |
319 | #FA Need to replace between backslashes... |
320 | $base_directories =~ s|[^\\]+|..|g ; |
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321 | |
322 | # Glue the two together, using a separator if necessary, and preventing an |
323 | # empty result. |
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324 | |
325 | #FA Must check that new directories are not empty. |
326 | if ( $path_directories ne '' && $base_directories ne '' ) { |
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327 | $path_directories = "$base_directories\\$path_directories" ; |
328 | } else { |
329 | $path_directories = "$base_directories$path_directories" ; |
330 | } |
331 | |
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332 | # It makes no sense to add a relative path to a UNC volume |
333 | $path_volume = '' unless $path_volume =~ m{^[A-Z]:}i ; |
334 | |
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335 | return $self->canonpath( |
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336 | $self->catpath($path_volume, $path_directories, $path_file ) |
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337 | ) ; |
338 | } |
339 | |
340 | =item rel2abs |
341 | |
342 | Converts a relative path to an absolute path. |
343 | |
344 | $abs_path = $File::Spec->rel2abs( $destination ) ; |
345 | $abs_path = $File::Spec->rel2abs( $destination, $base ) ; |
346 | |
347 | If $base is not present or '', then L<cwd()> is used. If $base is relative, |
348 | then it is converted to absolute form using L</rel2abs()>. This means that it |
349 | is taken to be relative to L</cwd()>. |
350 | |
351 | Assumes that both paths are on the $base volume, and ignores the |
352 | $destination volume. |
353 | |
354 | On systems that have a grammar that indicates filenames, this ignores the |
355 | $base filename as well. Otherwise all path components are assumed to be |
356 | directories. |
357 | |
358 | If $path is absolute, it is cleaned up and returned using L</canonpath()>. |
359 | |
360 | Based on code written by Shigio Yamaguchi. |
361 | |
362 | No checks against the filesystem are made. |
363 | |
364 | =cut |
365 | |
366 | sub rel2abs($;$;) { |
367 | my ($self,$path,$base ) = @_; |
368 | |
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369 | if ( ! $self->file_name_is_absolute( $path ) ) { |
370 | |
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371 | if ( ! $self->file_name_is_absolute( $base ) ) { |
372 | $base = $self->rel2abs( $base ) ; |
373 | } |
374 | elsif ( !defined( $base ) || $base eq '' ) { |
375 | $base = cwd() ; |
376 | } |
377 | else { |
378 | $base = $self->canonpath( $base ) ; |
379 | } |
380 | |
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381 | my ( undef, $path_directories, $path_file ) = |
382 | $self->splitpath( $path, 1 ) ; |
383 | |
384 | my ( $base_volume, $base_directories, undef ) = |
385 | $self->splitpath( $base, 1 ) ; |
386 | |
387 | $path = $self->catpath( |
388 | $base_volume, |
389 | $self->catdir( $base_directories, $path_directories ), |
390 | $path_file |
391 | ) ; |
392 | } |
393 | |
394 | return $self->canonpath( $path ) ; |
395 | } |
396 | |
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397 | =back |
398 | |
cbc7acb0 |
399 | =head1 SEE ALSO |
400 | |
401 | L<File::Spec> |
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402 | |
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403 | =cut |
404 | |
405 | 1; |