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Path::Class(3) User Contributed Perl Documentation Path::Class(3)

NAME

Path::Class - Cross-platform path specification manipulation

SYNOPSIS

use Path::Class;

my $dir = dir('foo', 'bar'); # Path::Class::Dir object

my $file = file('bob', 'file.txt'); # Path::Class::File object

# Stringifies to 'foo/bar' on Unix, 'foo\bar' on Windows, etc.

print "dir: $dir\n";

# Stringifies to 'bob/file.txt' on Unix, 'bob\file.txt' on Windows

print "file: $file\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(foreignfile foreigndir);

my $file = foreignfile('Mac', ':foo:file.txt');

print $file->dir; # :foo:

print $file->asforeign('Win32'); # foo\file.txt

# Interact with the underlying filesystem:

# $dirhandle is an IO::Dir object

my $dirhandle = $dir->open or die "Can't read $dir: $!";

# $filehandle is an IO::File object

my $filehandle = $file->open($mode) or die "Can't read $file: $!";

DESCRIPTION

"Path::Class" is a module for manipulation of file and directory

specifications (strings describing their locations, like

'/home/ken/foo.txt' or 'C:\Windows\Foo.txt') in a cross-platform

manner. It supports pretty much every platform Perl runs on, including Unix, Windows, Mac, VMS, Epoc, Cygwin, OS/2, and NetWare.

The well-known module "File::Spec" also provides this service, but it's

sort of awkward to use well, so people sometimes avoid it, or use it in a way that won't actually work properly on platforms significantly different than the ones they've tested their code on.

In fact, "Path::Class" uses "File::Spec" internally, wrapping all the

unsightly details so you can concentrate on your application code. Whereas "File::Spec" provides functions for some common path

manipulations, "Path::Class" provides an object-oriented model of the

world of path specifications and their underlying semantics. "File::Spec" doesn't create any objects, and its classes represent the different ways in which paths must be manipulated on various platforms

(not a very intuitive concept). "Path::Class" creates objects

representing files and directories, and provides methods that relate them to each other. For instance, the following "File::Spec" code:

my $absolute = File::Spec->filenameisabsolute(

File::Spec->catfile( @dirs, $file )

);

can be written using "Path::Class" as

my $absolute = Path::Class::File->new( @dirs, $file )->isabsolute;

or even as

my $absolute = file( @dirs, $file )->isabsolute;

Similar readability improvements should happen all over the place when

using "Path::Class".

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 file and directory objects

will know what volumes they refer to and do the right thing.

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. EEXXPPOORRTT The following functions are exported by default. file

A synonym for "Path::Class::File->new".

dir A synonym for "Path::Class::Dir->new".

If you would like to prevent their export, you may explicitly pass an

empty list to perl's "use", i.e. "use Path::Class ()".

The following are exported only on demand. foreignfile

A synonym for "Path::Class::File->newforeign".

foreigndir

A synonym for "Path::Class::Dir->newforeign".

NNootteess oonn CCrroossss-PPllaattffoorrmm CCoommppaattiibbiilliittyy

Although it is much easier to write cross-platform-friendly code with

this module than with "File::Spec", there are still some issues to be aware of. +o Some platforms, notably VMS and some older versions of DOS (I think), all filenames must have an extension. Thus if you create a file called foo/bar and then ask for a list of files in the directory foo, you may find a file called bar. instead of the bar you were expecting. Thus it might be a good idea to use an extension in the first place. AUTHOR Ken Williams, KWILLIAMS@cpan.org COPYRIGHT Copyright (c) Ken Williams. All rights reserved. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.