Commit | Line | Data |
08aa1457 |
1 | #!perl -w |
2 | |
37248846 |
3 | # use strict fails |
4 | #Can't use string ("main::glob") as a symbol ref while "strict refs" in use at /usr/lib/perl5/5.005/File/DosGlob.pm line 191. |
5 | |
08aa1457 |
6 | # |
7 | # Documentation at the __END__ |
8 | # |
9 | |
10 | package File::DosGlob; |
11 | |
b75c8c73 |
12 | our $VERSION = '1.00'; |
13 | use strict; |
b395063c |
14 | use warnings; |
b75c8c73 |
15 | |
08aa1457 |
16 | sub doglob { |
17 | my $cond = shift; |
18 | my @retval = (); |
19 | #print "doglob: ", join('|', @_), "\n"; |
20 | OUTER: |
b75c8c73 |
21 | for my $pat (@_) { |
08aa1457 |
22 | my @matched = (); |
23 | my @globdirs = (); |
24 | my $head = '.'; |
25 | my $sepchr = '/'; |
b75c8c73 |
26 | my $tail; |
27 | next OUTER unless defined $pat and $pat ne ''; |
08aa1457 |
28 | # if arg is within quotes strip em and do no globbing |
b75c8c73 |
29 | if ($pat =~ /^"(.*)"\z/s) { |
30 | $pat = $1; |
31 | if ($cond eq 'd') { push(@retval, $pat) if -d $pat } |
32 | else { push(@retval, $pat) if -e $pat } |
08aa1457 |
33 | next OUTER; |
34 | } |
4dd406c2 |
35 | # wildcards with a drive prefix such as h:*.pm must be changed |
36 | # to h:./*.pm to expand correctly |
b75c8c73 |
37 | if ($pat =~ m|^([A-Za-z]:)[^/\\]|s) { |
4dd406c2 |
38 | substr($_,0,2) = $1 . "./"; |
39 | } |
b75c8c73 |
40 | if ($pat =~ m|^(.*)([\\/])([^\\/]*)\z|s) { |
08aa1457 |
41 | ($head, $sepchr, $tail) = ($1,$2,$3); |
42 | #print "div: |$head|$sepchr|$tail|\n"; |
b75c8c73 |
43 | push (@retval, $pat), next OUTER if $tail eq ''; |
08aa1457 |
44 | if ($head =~ /[*?]/) { |
45 | @globdirs = doglob('d', $head); |
46 | push(@retval, doglob($cond, map {"$_$sepchr$tail"} @globdirs)), |
47 | next OUTER if @globdirs; |
48 | } |
4dd406c2 |
49 | $head .= $sepchr if $head eq '' or $head =~ /^[A-Za-z]:\z/s; |
b75c8c73 |
50 | $pat = $tail; |
08aa1457 |
51 | } |
52 | # |
53 | # If file component has no wildcards, we can avoid opendir |
b75c8c73 |
54 | unless ($pat =~ /[*?]/) { |
08aa1457 |
55 | $head = '' if $head eq '.'; |
56 | $head .= $sepchr unless $head eq '' or substr($head,-1) eq $sepchr; |
b75c8c73 |
57 | $head .= $pat; |
08aa1457 |
58 | if ($cond eq 'd') { push(@retval,$head) if -d $head } |
59 | else { push(@retval,$head) if -e $head } |
60 | next OUTER; |
61 | } |
62 | opendir(D, $head) or next OUTER; |
63 | my @leaves = readdir D; |
64 | closedir D; |
65 | $head = '' if $head eq '.'; |
66 | $head .= $sepchr unless $head eq '' or substr($head,-1) eq $sepchr; |
67 | |
68 | # escape regex metachars but not glob chars |
b75c8c73 |
69 | $pat =~ s:([].+^\-\${}[|]):\\$1:g; |
08aa1457 |
70 | # and convert DOS-style wildcards to regex |
b75c8c73 |
71 | $pat =~ s/\*/.*/g; |
72 | $pat =~ s/\?/.?/g; |
08aa1457 |
73 | |
b75c8c73 |
74 | #print "regex: '$pat', head: '$head'\n"; |
75 | my $matchsub = sub { $_[0] =~ m|^$pat\z|is }; |
08aa1457 |
76 | INNER: |
77 | for my $e (@leaves) { |
78 | next INNER if $e eq '.' or $e eq '..'; |
79 | next INNER if $cond eq 'd' and ! -d "$head$e"; |
80 | push(@matched, "$head$e"), next INNER if &$matchsub($e); |
81 | # |
82 | # [DOS compatibility special case] |
83 | # Failed, add a trailing dot and try again, but only |
84 | # if name does not have a dot in it *and* pattern |
85 | # has a dot *and* name is shorter than 9 chars. |
86 | # |
87 | if (index($e,'.') == -1 and length($e) < 9 |
b75c8c73 |
88 | and index($pat,'\\.') != -1) { |
08aa1457 |
89 | push(@matched, "$head$e"), next INNER if &$matchsub("$e."); |
90 | } |
91 | } |
92 | push @retval, @matched if @matched; |
93 | } |
94 | return @retval; |
95 | } |
96 | |
97 | # |
fb73857a |
98 | # this can be used to override CORE::glob in a specific |
99 | # package by saying C<use File::DosGlob 'glob';> in that |
100 | # namespace. |
08aa1457 |
101 | # |
fb73857a |
102 | |
103 | # context (keyed by second cxix arg provided by core) |
104 | my %iter; |
105 | my %entries; |
106 | |
107 | sub glob { |
b75c8c73 |
108 | my($pat,$cxix) = @_; |
163d180b |
109 | my @pat; |
fb73857a |
110 | |
111 | # glob without args defaults to $_ |
112 | $pat = $_ unless defined $pat; |
113 | |
163d180b |
114 | # extract patterns |
115 | if ($pat =~ /\s/) { |
116 | require Text::ParseWords; |
117 | @pat = Text::ParseWords::parse_line('\s+',0,$pat); |
118 | } |
119 | else { |
120 | push @pat, $pat; |
121 | } |
122 | |
37248846 |
123 | # Mike Mestnik: made to do abc{1,2,3} == abc1 abc2 abc3. |
124 | # abc3 will be the original {3} (and drop the {}). |
125 | # abc1 abc2 will be put in @appendpat. |
126 | # This was just the esiest way, not nearly the best. |
127 | REHASH: { |
128 | my @appendpat = (); |
129 | for (@pat) { |
130 | # There must be a "," I.E. abc{efg} is not what we want. |
131 | while ( /^(.*)(?<!\\)\{(.*?)(?<!\\)\,.*?(?<!\\)\}(.*)$/ ) { |
132 | my ($start, $match, $end) = ($1, $2, $3); |
133 | #print "Got: \n\t$start\n\t$match\n\t$end\n"; |
134 | my $tmp = "$start$match$end"; |
135 | while ( $tmp =~ s/^(.*?)(?<!\\)\{(?:.*(?<!\\)\,)?(.*\Q$match\E.*?)(?:(?<!\\)\,.*)?(?<!\\)\}(.*)$/$1$2$3/ ) { |
136 | #print "Striped: $tmp\n"; |
137 | # these expanshions will be preformed by the original, |
138 | # when we call REHASH. |
139 | } |
140 | push @appendpat, ("$tmp"); |
141 | s/^\Q$start\E(?<!\\)\{\Q$match\E(?<!\\)\,/$start\{/; |
142 | if ( /^\Q$start\E(?<!\\)\{(?!.*?(?<!\\)\,.*?\Q$end\E$)(.*)(?<!\\)\}\Q$end\E$/ ) { |
143 | $match = $1; |
144 | #print "GOT: \n\t$start\n\t$match\n\t$end\n\n"; |
145 | $_ = "$start$match$end"; |
146 | } |
147 | } |
148 | #print "Sould have "GOT" vs "Got"!\n"; |
149 | #FIXME: There should be checking for this. |
150 | # How or what should be done about failure is beond me. |
151 | } |
152 | if ( $#appendpat != -1 |
153 | ) { |
154 | #print "LOOP\n"; |
155 | #FIXME: Max loop, no way! :") |
156 | for ( @appendpat ) { |
157 | push @pat, $_; |
158 | } |
159 | goto REHASH; |
160 | } |
161 | } |
162 | for ( @pat ) { |
163 | s/\\{/{/g; |
164 | s/\\}/}/g; |
165 | s/\\,/,/g; |
166 | } |
167 | #print join ("\n", @pat). "\n"; |
168 | |
fb73857a |
169 | # assume global context if not provided one |
170 | $cxix = '_G_' unless defined $cxix; |
171 | $iter{$cxix} = 0 unless exists $iter{$cxix}; |
172 | |
173 | # if we're just beginning, do it all first |
174 | if ($iter{$cxix} == 0) { |
163d180b |
175 | $entries{$cxix} = [doglob(1,@pat)]; |
fb73857a |
176 | } |
177 | |
178 | # chuck it all out, quick or slow |
179 | if (wantarray) { |
180 | delete $iter{$cxix}; |
181 | return @{delete $entries{$cxix}}; |
182 | } |
183 | else { |
184 | if ($iter{$cxix} = scalar @{$entries{$cxix}}) { |
185 | return shift @{$entries{$cxix}}; |
186 | } |
187 | else { |
188 | # return undef for EOL |
189 | delete $iter{$cxix}; |
190 | delete $entries{$cxix}; |
191 | return undef; |
192 | } |
193 | } |
194 | } |
08aa1457 |
195 | |
b75c8c73 |
196 | { |
197 | no strict 'refs'; |
198 | |
199 | sub import { |
08aa1457 |
200 | my $pkg = shift; |
95d94a4f |
201 | return unless @_; |
08aa1457 |
202 | my $sym = shift; |
4dd406c2 |
203 | my $callpkg = ($sym =~ s/^GLOBAL_//s ? 'CORE::GLOBAL' : caller(0)); |
95d94a4f |
204 | *{$callpkg.'::'.$sym} = \&{$pkg.'::'.$sym} if $sym eq 'glob'; |
b75c8c73 |
205 | } |
08aa1457 |
206 | } |
08aa1457 |
207 | 1; |
208 | |
209 | __END__ |
210 | |
211 | =head1 NAME |
212 | |
213 | File::DosGlob - DOS like globbing and then some |
214 | |
08aa1457 |
215 | =head1 SYNOPSIS |
216 | |
217 | require 5.004; |
3cb6de81 |
218 | |
fb73857a |
219 | # override CORE::glob in current package |
220 | use File::DosGlob 'glob'; |
3cb6de81 |
221 | |
95d94a4f |
222 | # override CORE::glob in ALL packages (use with extreme caution!) |
223 | use File::DosGlob 'GLOBAL_glob'; |
224 | |
08aa1457 |
225 | @perlfiles = glob "..\\pe?l/*.p?"; |
226 | print <..\\pe?l/*.p?>; |
3cb6de81 |
227 | |
fb73857a |
228 | # from the command line (overrides only in main::) |
08aa1457 |
229 | > perl -MFile::DosGlob=glob -e "print <../pe*/*p?>" |
08aa1457 |
230 | |
231 | =head1 DESCRIPTION |
232 | |
233 | A module that implements DOS-like globbing with a few enhancements. |
dfb634a9 |
234 | It is largely compatible with perlglob.exe (the M$ setargv.obj |
08aa1457 |
235 | version) in all but one respect--it understands wildcards in |
236 | directory components. |
237 | |
238 | For example, C<<..\\l*b\\file/*glob.p?>> will work as expected (in |
239 | that it will find something like '..\lib\File/DosGlob.pm' alright). |
240 | Note that all path components are case-insensitive, and that |
241 | backslashes and forward slashes are both accepted, and preserved. |
242 | You may have to double the backslashes if you are putting them in |
243 | literally, due to double-quotish parsing of the pattern by perl. |
244 | |
163d180b |
245 | Spaces in the argument delimit distinct patterns, so |
246 | C<glob('*.exe *.dll')> globs all filenames that end in C<.exe> |
247 | or C<.dll>. If you want to put in literal spaces in the glob |
248 | pattern, you can escape them with either double quotes, or backslashes. |
249 | e.g. C<glob('c:/"Program Files"/*/*.dll')>, or |
250 | C<glob('c:/Program\ Files/*/*.dll')>. The argument is tokenized using |
251 | C<Text::ParseWords::parse_line()>, so see L<Text::ParseWords> for details |
252 | of the quoting rules used. |
253 | |
08aa1457 |
254 | Extending it to csh patterns is left as an exercise to the reader. |
255 | |
256 | =head1 EXPORTS (by request only) |
257 | |
258 | glob() |
259 | |
260 | =head1 BUGS |
261 | |
262 | Should probably be built into the core, and needs to stop |
263 | pandering to DOS habits. Needs a dose of optimizium too. |
264 | |
265 | =head1 AUTHOR |
266 | |
6e238990 |
267 | Gurusamy Sarathy <gsar@activestate.com> |
08aa1457 |
268 | |
269 | =head1 HISTORY |
270 | |
271 | =over 4 |
272 | |
273 | =item * |
274 | |
95d94a4f |
275 | Support for globally overriding glob() (GSAR 3-JUN-98) |
276 | |
277 | =item * |
278 | |
fb73857a |
279 | Scalar context, independent iterator context fixes (GSAR 15-SEP-97) |
280 | |
281 | =item * |
282 | |
08aa1457 |
283 | A few dir-vs-file optimizations result in glob importation being |
284 | 10 times faster than using perlglob.exe, and using perlglob.bat is |
285 | only twice as slow as perlglob.exe (GSAR 28-MAY-97) |
286 | |
287 | =item * |
288 | |
289 | Several cleanups prompted by lack of compatible perlglob.exe |
290 | under Borland (GSAR 27-MAY-97) |
291 | |
292 | =item * |
293 | |
294 | Initial version (GSAR 20-FEB-97) |
295 | |
296 | =back |
297 | |
298 | =head1 SEE ALSO |
299 | |
300 | perl |
301 | |
dfb634a9 |
302 | perlglob.bat |
303 | |
163d180b |
304 | Text::ParseWords |
305 | |
08aa1457 |
306 | =cut |
307 | |