JezK
Edit File: DosGlob.pm
#!perl -w # # Documentation at the __END__ # package File::DosGlob; our $VERSION = '1.12'; use strict; use warnings; require XSLoader; XSLoader::load(); sub doglob { my $cond = shift; my @retval = (); my $fix_drive_relative_paths; OUTER: for my $pat (@_) { my @matched = (); my @globdirs = (); my $head = '.'; my $sepchr = '/'; my $tail; next OUTER unless defined $pat and $pat ne ''; # if arg is within quotes strip em and do no globbing if ($pat =~ /^"(.*)"\z/s) { $pat = $1; if ($cond eq 'd') { push(@retval, $pat) if -d $pat } else { push(@retval, $pat) if -e $pat } next OUTER; } # wildcards with a drive prefix such as h:*.pm must be changed # to h:./*.pm to expand correctly if ($pat =~ m|^([A-Za-z]:)[^/\\]|s) { substr($pat,0,2) = $1 . "./"; $fix_drive_relative_paths = 1; } if ($pat =~ m|^(.*)([\\/])([^\\/]*)\z|s) { ($head, $sepchr, $tail) = ($1,$2,$3); push (@retval, $pat), next OUTER if $tail eq ''; if ($head =~ /[*?]/) { @globdirs = doglob('d', $head); push(@retval, doglob($cond, map {"$_$sepchr$tail"} @globdirs)), next OUTER if @globdirs; } $head .= $sepchr if $head eq '' or $head =~ /^[A-Za-z]:\z/s; $pat = $tail; } # # If file component has no wildcards, we can avoid opendir unless ($pat =~ /[*?]/) { $head = '' if $head eq '.'; $head .= $sepchr unless $head eq '' or substr($head,-1) eq $sepchr; $head .= $pat; if ($cond eq 'd') { push(@retval,$head) if -d $head } else { push(@retval,$head) if -e $head } next OUTER; } opendir(D, $head) or next OUTER; my @leaves = readdir D; closedir D; # VMS-format filespecs, especially if they contain extended characters, # are unlikely to match patterns correctly, so Unixify them. if ($^O eq 'VMS') { require VMS::Filespec; @leaves = map {$_ =~ s/\.$//; VMS::Filespec::unixify($_)} @leaves; } $head = '' if $head eq '.'; $head .= $sepchr unless $head eq '' or substr($head,-1) eq $sepchr; # escape regex metachars but not glob chars $pat =~ s:([].+^\-\${}()[|]):\\$1:g; # and convert DOS-style wildcards to regex $pat =~ s/\*/.*/g; $pat =~ s/\?/.?/g; my $matchsub = sub { $_[0] =~ m|^$pat\z|is }; INNER: for my $e (@leaves) { next INNER if $e eq '.' or $e eq '..'; next INNER if $cond eq 'd' and ! -d "$head$e"; push(@matched, "$head$e"), next INNER if &$matchsub($e); # # [DOS compatibility special case] # Failed, add a trailing dot and try again, but only # if name does not have a dot in it *and* pattern # has a dot *and* name is shorter than 9 chars. # if (index($e,'.') == -1 and length($e) < 9 and index($pat,'\\.') != -1) { push(@matched, "$head$e"), next INNER if &$matchsub("$e."); } } push @retval, @matched if @matched; } if ($fix_drive_relative_paths) { s|^([A-Za-z]:)\./|$1| for @retval; } return @retval; } # # this can be used to override CORE::glob in a specific # package by saying C<use File::DosGlob 'glob';> in that # namespace. # # context (keyed by second cxix arg provided by core) our %entries; sub glob { my($pat,$cxix) = ($_[0], _callsite()); my @pat; # glob without args defaults to $_ $pat = $_ unless defined $pat; # if we're just beginning, do it all first if (!$entries{$cxix}) { # extract patterns if ($pat =~ /\s/) { require Text::ParseWords; @pat = Text::ParseWords::parse_line('\s+',0,$pat); } else { push @pat, $pat; } # Mike Mestnik: made to do abc{1,2,3} == abc1 abc2 abc3. # abc3 will be the original {3} (and drop the {}). # abc1 abc2 will be put in @appendpat. # This was just the easiest way, not nearly the best. REHASH: { my @appendpat = (); for (@pat) { # There must be a "," I.E. abc{efg} is not what we want. while ( /^(.*)(?<!\\)\{(.*?)(?<!\\)\,.*?(?<!\\)\}(.*)$/ ) { my ($start, $match, $end) = ($1, $2, $3); #print "Got: \n\t$start\n\t$match\n\t$end\n"; my $tmp = "$start$match$end"; while ( $tmp =~ s/^(.*?)(?<!\\)\{(?:.*(?<!\\)\,)?(.*\Q$match\E.*?)(?:(?<!\\)\,.*)?(?<!\\)\}(.*)$/$1$2$3/ ) { # these expansions will be performed by the original, # when we call REHASH. } push @appendpat, ("$tmp"); s/^\Q$start\E(?<!\\)\{\Q$match\E(?<!\\)\,/$start\{/; if ( /^\Q$start\E(?<!\\)\{(?!.*?(?<!\\)\,.*?\Q$end\E$)(.*)(?<!\\)\}\Q$end\E$/ ) { $match = $1; #print "GOT: \n\t$start\n\t$match\n\t$end\n\n"; $_ = "$start$match$end"; } } #print "Sould have "GOT" vs "Got"!\n"; #FIXME: There should be checking for this. # How or what should be done about failure is beyond me. } if ( $#appendpat != -1 ) { #FIXME: Max loop, no way! :") for ( @appendpat ) { push @pat, $_; } goto REHASH; } } for ( @pat ) { s/\\([{},])/$1/g; } $entries{$cxix} = [doglob(1,@pat)]; } # chuck it all out, quick or slow if (wantarray) { return @{delete $entries{$cxix}}; } else { if (scalar @{$entries{$cxix}}) { return shift @{$entries{$cxix}}; } else { # return undef for EOL delete $entries{$cxix}; return undef; } } } { no strict 'refs'; sub import { my $pkg = shift; return unless @_; my $sym = shift; my $callpkg = ($sym =~ s/^GLOBAL_//s ? 'CORE::GLOBAL' : caller(0)); *{$callpkg.'::'.$sym} = \&{$pkg.'::'.$sym} if $sym eq 'glob'; } } 1; __END__ =head1 NAME File::DosGlob - DOS like globbing and then some =head1 SYNOPSIS require 5.004; # override CORE::glob in current package use File::DosGlob 'glob'; # override CORE::glob in ALL packages (use with extreme caution!) use File::DosGlob 'GLOBAL_glob'; @perlfiles = glob "..\\pe?l/*.p?"; print <..\\pe?l/*.p?>; # from the command line (overrides only in main::) > perl -MFile::DosGlob=glob -e "print <../pe*/*p?>" =head1 DESCRIPTION A module that implements DOS-like globbing with a few enhancements. It is largely compatible with perlglob.exe (the M$ setargv.obj version) in all but one respect--it understands wildcards in directory components. For example, C<< <..\\l*b\\file/*glob.p?> >> will work as expected (in that it will find something like '..\lib\File/DosGlob.pm' alright). Note that all path components are case-insensitive, and that backslashes and forward slashes are both accepted, and preserved. You may have to double the backslashes if you are putting them in literally, due to double-quotish parsing of the pattern by perl. Spaces in the argument delimit distinct patterns, so C<glob('*.exe *.dll')> globs all filenames that end in C<.exe> or C<.dll>. If you want to put in literal spaces in the glob pattern, you can escape them with either double quotes, or backslashes. e.g. C<glob('c:/"Program Files"/*/*.dll')>, or C<glob('c:/Program\ Files/*/*.dll')>. The argument is tokenized using C<Text::ParseWords::parse_line()>, so see L<Text::ParseWords> for details of the quoting rules used. Extending it to csh patterns is left as an exercise to the reader. =head1 EXPORTS (by request only) glob() =head1 BUGS Should probably be built into the core, and needs to stop pandering to DOS habits. Needs a dose of optimization too. =head1 AUTHOR Gurusamy Sarathy <gsar@activestate.com> =head1 HISTORY =over 4 =item * Support for globally overriding glob() (GSAR 3-JUN-98) =item * Scalar context, independent iterator context fixes (GSAR 15-SEP-97) =item * A few dir-vs-file optimizations result in glob importation being 10 times faster than using perlglob.exe, and using perlglob.bat is only twice as slow as perlglob.exe (GSAR 28-MAY-97) =item * Several cleanups prompted by lack of compatible perlglob.exe under Borland (GSAR 27-MAY-97) =item * Initial version (GSAR 20-FEB-97) =back =head1 SEE ALSO perl perlglob.bat Text::ParseWords =cut