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package App::Hashl;
use strict;
use warnings;
use autodie;
use 5.010;
use Digest::SHA qw(sha1_hex);
use Storable qw(nstore retrieve);
my $VERSION = '0.1';
=head1 NAME
App::Hashl - Partially hash files, check if files are equal etc.
=head1 SYNOPSIS
use App::Hashl;
my $hashl = App::Hashl->new();
# or: App::Hashl->new_from_file($database_file);
for my $file (@files) {
$hashl->add_file($file, {
hash
=cut
sub new {
my ($obj, %conf) = @_;
my $ref = {
files => {},
ignored => {},
};
$ref->{config} = \%conf;
$ref->{config}->{read_size} //= (2 ** 20) * 4, # 4 MiB
return bless($ref, $obj);
}
sub new_from_file {
my ($obj, $file) = @_;
my $ref = retrieve($file);
return bless($ref, $obj);
}
sub si_size {
my ($self, $bytes) = @_;
my @post = (' ', qw(k M G T));
while ($bytes >= 1024) {
$bytes /= 1024;
shift @post;
}
return sprintf("%6.1f%s", $bytes, $post[0]);
}
sub hash_file {
my ($self, $file) = @_;
my ($fh, $data);
open($fh, '<', $file);
binmode($fh);
read($fh, $data, $self->{config}->{read_size});
close($fh);
return sha1_hex($data);
}
sub hash_in_db {
my ($self, $hash) = @_;
if ($self->{ignored}->{hashes}) {
for my $ihash (@{$self->{ignored}->{hashes}}) {
if ($hash eq $ihash) {
return '// ignored';
}
}
}
for my $name ($self->files()) {
my $file = $self->file($name);
if ($file->{hash} eq $hash) {
return $name;
}
}
return undef;
}
sub file_in_db {
my ($self, $file) = @_;
return $self->hash_in_db($self->hash_file($file));
}
sub read_size {
my ($self) = @_;
return $self->{config}->{read_size};
}
sub file {
my ($self, $name) = @_;
return $self->{files}->{$name};
}
sub delete_file {
my ($self, $name) = @_;
delete $self->{files}->{$name};
}
sub files {
my ($self) = @_;
return sort keys %{ $self->{files} };
}
sub add_file {
my ($self, %data) = @_;
my $file = $data{file};
my $path = $data{path};
if ($self->file($file) and
$self->file($file)->{mtime} == $data{mtime} and
$self->file($file)->{size} == $data{size} ) {
return;
}
$self->{files}->{$file} = {
hash => $self->hash_file($file),
mtime => $data{mtime},
size => $data{size},
};
}
sub ignored {
my ($self) = @_;
if (exists $self->{ignored}->{hashes}) {
return @{ $self->{ignored}->{hashes} };
}
else {
return ();
}
}
sub ignore {
my ($self, $file) = @_;
push(@{ $self->{ignored}->{hashes} }, $file);
}
sub save {
my ($self, $file) = @_;
nstore($self, $file);
}
1;
__END__
=head1 NAME
=head1 SYNOPSIS
=head1 DESCRIPTION
=head1 METHODS
=over
=back
=head1 DEPENDENCIES
=head1 SEE ALSO
=head1 AUTHOR
Copyright (C) 2011 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>
=head1 LICENSE
0. You just DO WHAT THE FUCK YOU WANT TO.
|
