Path::Class - Cross-platform path specification manipulation
use Path::Class qw(file dir); # Export a couple of short constructors my $dir = dir('foo', 'bar'); # Path::Class::Dir object my $file = file('bob', 'file.txt'); # Path::Class::File object # Stringifies to 'bob/file.txt' on Unix, 'bob\file.txt' on Windows print "file: $file\n"; # Stringifies to 'foo/bar' on Unix, 'foo\bar' on Windows print "dir: $dir\n"; my $subdir = $dir->subdir('baz'); # foo/bar/baz my $parent = $subdir->parent; # foo/bar my $parent2 = $parent->parent; # foo my $dir2 = $file->dir; # bob # Work with foreign paths use Path::Class qw(foreign_file foreign_dir); my $file = foreign_file('Mac', ':foo:file.txt'); print $file->dir; # :foo: print $file->as_foreign('Win32'); # foo\file.txt
The well-known module File::Spec allows Perl programmers to manipulate file and directory specifications (strings describing their locations, like '/home/ken/foo.txt' or 'C:\Windows\Foo.txt') in a cross-platform manner, but it's sort of awkward to use well, so people sometimes avoid it.
File::Spec
'/home/ken/foo.txt'
'C:\Windows\Foo.txt'
Path::Class provides a nicer interface (nicer in my opinion, anyway) to the File::Spec functionality. File::Spec has an object-oriented interface, but the OO-ness doesn't actually buy you anything. All it does is give you a really long name for some things that are essentially function calls (not very helpful), and lets you avoid polluting your namespace with function names (somewhat helpful).
Path::Class
Path::Class actually gets some mileage out of its class hierarchy. It has a class for files and a class for directories, and methods that relate them to each other. For instance, the following File::Spec code:
my $absolute = File::Spec->file_name_is_absolute( File::Spec->catfile( @dirs, $file ) );
can be written using Path::Class as
my $absolute = Path::Class::File->new( @dirs, $file )->is_absolute;
or even as
my $absolute = file( @dirs, $file )->is_absolute;
if you're willing to export the file function into your namespace. Similar readability improvements happen all over the place when using Path::Class.
file
Using Path::Class can help solve real problems in your code too - for instance, how many people actually take the "volume" (like C: on Windows) into account when writing File::Spec-using code? I thought not. But if you use Path::Class, your directory objects will know what volumes they refer to and do the right thing.
C:
The guts of the Path::Class code live in the Path::Class::File and Path::Class::Dir modules, so please see those modules' documentation for more details about how to use them.
Path::Class::File
Path::Class::Dir
The following functions can be exported upon request:
A synonym for Path::Class::File->new.
Path::Class::File->new
A synonym for Path::Class::Dir->new.
Path::Class::Dir->new
A synonym for Path::Class::File->new_foreign.
Path::Class::File->new_foreign
A synonym for Path::Class::Dir->new_foreign.
Path::Class::Dir->new_foreign
Ken Williams, ken@mathforum.org
Path::Class::Dir, Path::Class::File, File::Spec
To install Path::Class, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Path::Class
CPAN shell
perl -MCPAN -e shell install Path::Class
For more information on module installation, please visit the detailed CPAN module installation guide.