猴子打补丁
#!/usr/bin/perl --
use strict;
use warnings;
use Path::Class ;
my @paths = map dir($_) ,
map join('/', $_, 1..6),
grep defined,
@ENV{qw/ WINDIR PROGRAMFILES TEMP HOME /},
'Q:/bogus/drive/and/path',
'QQ:/bogus/drive/bogusly/treated/as/file',
;
push @paths, dir('bogus/relative/path/becomes/dot');
push @paths, dir('bogus/relative/path/becomes/relative/to/cwd')->absolute;
for my $path (@paths) {
print $path, "\n\t=> ", $path->real_parent, "\n\n";
}
sub Path::Class::Entity::real_parent {
package Path::Class::Entity;
my($dir) = @_;
while(!-d $dir){
my $parent = $dir->parent;
last if $parent eq $dir ; # no infinite loop on bogus drive
$dir = $parent;
}
return $dir if -d $dir;
return;
}
__END__
C:\WINDOWS\1\2\3\4\5\6
=> C:\WINDOWS
C:\PROGRA~1\1\2\3\4\5\6
=> C:\PROGRA~1
C:\DOCUME~1\bogey\LOCALS~1\Temp\1\2\3\4\5\6
=> C:\DOCUME~1\bogey\LOCALS~1\Temp
C:\DOCUME~1\bogey\1\2\3\4\5\6
=> C:\DOCUME~1\bogey
Q:\bogus\drive\and\path\1\2\3\4\5\6
=>
QQ:\bogus\drive\bogusly\treated\as\file\1\2\3\4\5\6
=> .
bogus\relative\path\becomes\dot
=> .
C:\temp\bogus\relative\path\becomes\relative\to\cwd
=> C:\temp
路径始于'/':'/选择在/ var/DOES/NOT/EXIST/WTV/blarg.txt' – Toto
如果提供虚假完全相路径('bogus/relative/path'),该方法返回当前工作目录('.'),这可能或不可能是OP想要的。另外,至少在Windows上,如果'$ path'使用不存在的卷,'while'循环无法终止。 – FMc