Provided by: libfile-fu-perl_0.0.8-1_all 
NAME
File::Fu::Dir - a directoryname object
SYNOPSIS
use File::Fu;
my $dir = File::Fu->dir("path/to/dir");
$dir->e and warn "$dir exists";
$dir->l and warn "$dir is a link to ", $dir->readlink;
foreach my $entry ($dir->list) {
warn $entry . ': ' . $entry->stat->size, "\n"
if($entry->f);
}
Constructor
new
my $dir = File::Fu::Dir->new($path);
my $dir = File::Fu::Dir->new(@path);
Class Constants/Methods
file_class
Return the corresponding file class for this dir object. Default: File::Fu::File.
my $fc = $class->file_class;
is_dir
Always true for a directory.
is_file
Always false for a directory.
temp_dir_class
Class for "temp_dir" objects. Default: File::Fu::Dir::Temp.
my $class = File::Fu::Dir->temp_dir_class;
temp_file_class
my $class = File::Fu::Dir->temp_file_class;
Methods
stringify
my $string = $dir->stringify;
bare
Stringify without the trailing slash/assertion.
my $str = $self->bare;
The trailing slash causes trouble when trying to address a symlink to a directory via a
dir object. Thus, "-l $dir" doesn't work, but "$dir->l" does the same thing as "-l
$dir->bare".
file
Create a filename object with $dir as its parent.
my $file = $dir->file($filename);
my $file = $dir + $filename;
append
Append a string only to the last directory part.
$dir->append('.tmp');
$dir %= "something";
subdir
$newdir = $dir->subdir('foo');
$newdir = $dir / 'foo';
part
Returns the $i'th part of the directory list.
my $part = $dir->part($i);
$dir->part(-1) is like $dir->basename, but not an object and not quite like
File::Basename::basename() when it comes to the / directory.
end
Shorthand for part(-1);
parts
Retrieve the inner list of the directory's parts.
my @parts = $dir->parts;
my @parts = $dir->parts(0..2);
The returned parts will be contiguous, but the request can be a two-element list (and can
also start or end at negative indices.)
my @parts = $dir->parts(3, 7);
my @parts = $dir->parts(3, -1);
my @parts = $dir->parts(-5, -1);
slice
Returns a new dir object as the return of parts().
my $slice = $dir->slice(0);
my $slice = $dir->slice(0,3);
map
Execute a callback on each part of $dir. The sub should modify $_ (yes, this is slightly
unlike the map() builtin.)
If $parts is defined as an integer or array reference of integers, it will be treated as a
slice on the directory parts to which the map should be applied.
$dir->map(sub {...}, [@parts]);
$dir &= sub {s/foo$/bar/};
So, to modify only the first directory part:
$dir->map(sub {s/foo$/bar/}, 0);
Properties
is_cwd
True if the $dir represents a relative (e.g. '.') directory.
my $bool = $dir->is_cwd;
basename
Returns the last part of the path as a Dir object.
my $bit = $dir->basename;
dirname
Returns the parent parts of the path as a Dir object.
my $parent = $dir->dirname;
absolute
Get an absolute name (without checking the filesystem.)
my $abs = $dir->absolute;
absolutely
Get an absolute path (resolved on filesystem, so it must exist.)
my $abs = $dir->absolutely;
Doing stuff
open
Calls opendir(), but throws an error if it fails.
my $dh = $dir->open;
Returns a directory handle, for e.g. readdir().
my @files = map({$dir + $_} grep({$_ !~ m/^\./} readdir($dh)));
touch
Update the timestamp of a directory (croak if it doesn't exist.)
$dir->touch;
list
my @paths = $dir->list(all => 1);
lister
my $subref = $dir->lister(all => 1);
contents
Equivalent to readdir. With the 'all' option true, returns hidden names too (but not the
'.' and '..' entries.)
The return values are strings, not File::Fu objects.
my @names = $dir->contents(all => 1);
iterate_contents
Returns a subref which will iterate over the directory's contents.
my $subref = $dir->iterate_contents(all => 1);
find
Recursively search a directory's contents for items where the supplied coderef (matcher)
returns true. The matcher will be invoked with the topic ($_) set to the current path
(which is either a Dir or File object.) The return values will be File::Fu::File or
File::Fu::Dir objects.
If your matcher returns true, the topic will be added to the return values.
my @paths = $dir->find(sub {m/foo/});
There is a knob for controlling recursion, which is the first argument to your matcher.
my @pm_files = $dir->find(sub {
return shift->prune
if($_->is_dir and $_->part(-1) =~ m/^\.svn$/);
$_->is_file and m/\.pm$/;
});
Differences from File::Find::find()
The invocant ($dir aka '.') is not examined (because this is an object method, there
is always only one starting path.)
The topic is always absolute in the same sense as the invocant. That is, if $dir is
relative to your current directory, then so are the topics and return values. If $dir
is absolute, so are the topics and return values.
finder
Returns an iterator for finding files. This iterator does everything that find() does,
but returns one path at a time. Returns undef when exhausted and zero when it is just
taking a break.
my $subref = $dir->finder(sub {$_->is_file and $_->file =~ m/foo/});
This allows a non-blocking find.
while(defined(my $path = $subref->())) {
$path or next; # 0 means 'not done yet'
# do something with $path (a file or dir object)
}
The find() method is implemented in terms of finder() by simply using a while() loop and
accumulating the return values.
The FindKnob object
The FindKnob object allows you to control the next steps of find(). Methods called on it
will typically return a value which also makes sense as a return value of your matcher
sub. Thus the idiom:
$dir->find(sub {return shift->prune if(condition); ...})
prune
Do not recurse into the topic directory. Returns false.
mkdir
Create the directory or croak with an error.
$dir->mkdir;
$dir->mkdir(0700);
create
Create the directory, with parents if needed.
$dir->create;
rmdir
Remove the directory or croak with an error.
$dir->rmdir;
remove
Remove the directory and all of its children.
$dir->remove;
unlink
$link->unlink;
symlink
Create a symlink which points to $dir.
my $link = $dir->symlink($linkname);
Note that symlinks are relative to where they live, so if $dir is a relative path, it must
be relative to $linkname.
readlink
my $to = $file->readlink;
Changing Directories
chdir
Change to the directory in self, returning a new '.' directory object.
$dir = $dir->chdir;
chdir_for
Change to $dir and run the given subroutine. The sub will be passed a './' directory
object.
$dir->chdir_for(sub {...});
chdir_local
Change to $dir, but return to the current cwd when $token goes out of scope.
my $token = $self->chdir_local;
Temporary Directories and Files
These methods use the $dir object as a parent location for the temp path. To use your
system's global temp space (e.g. '/tmp/'), just replace $dir with 'File::Fu'.
File::Fu->temp_dir; # '/tmp/'
File::Fu->dir->temp_dir; # './'
File::Fu->dir("foo")->temp_dir; # 'foo/'
File::Fu->temp_file; # '/tmp/'
File::Fu->dir->temp_file; # './'
File::Fu->dir("foo")->temp_file; # 'foo/'
temp_dir
Return a temporary directory in $dir.
my $dir = $dir->temp_dir;
temp_file
Return a filehandle to a temporary file in $dir.
my $handle = $dir->temp_file;
AUTHOR
Eric Wilhelm @ <ewilhelm at cpan dot org>
http://scratchcomputing.com/
BUGS
If you found this module on CPAN, please report any bugs or feature requests through the
web interface at <http://rt.cpan.org>. I will be notified, and then you'll automatically
be notified of progress on your bug as I make changes.
If you pulled this development version from my /svn/, please contact me directly.
COPYRIGHT
Copyright (C) 2008 Eric L. Wilhelm, All Rights Reserved.
NO WARRANTY
Absolutely, positively NO WARRANTY, neither express or implied, is offered with this
software. You use this software at your own risk. In case of loss, no person or entity
owes you anything whatsoever. You have been warned.
LICENSE
This program is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.