File Coverage

blib/lib/File/ShareDir/Tarball.pm

Criterion	Covered	Total	%
statement	27	34	79.4
branch	0	6	0.0
condition			n/a
subroutine	9	10	90.0
pod	1	1	100.0
total	37	51	72.5

package File::ShareDir::Tarball;
our $AUTHORITY = 'cpan:YANICK';
# ABSTRACT: Deal transparently with shared files distributed as tarballs
$File::ShareDir::Tarball::VERSION = '0.3.0';

use strict;
use warnings;

use parent qw/ Exporter /;

use Carp;

use File::ShareDir;
use Archive::Tar;
use File::Temp qw/ tempdir /;
use File::chdir;
use Memoize;

our @EXPORT_OK   = qw{
    dist_dir dist_file
};
our %EXPORT_TAGS = (
    all => [ @EXPORT_OK ],
);

my $shared_files_tarball = 'shared-files.tar.gz';

# we don't want to extract the same dirs again and
# again within a single program
memoize('dist_dir');

sub dist_dir {
    my $dist = shift;

    my $dir = File::ShareDir::dist_dir($dist);

    # no tarball? Assume regular shared dir
    return $dir unless -f "$dir/$shared_files_tarball";

    my $archive = Archive::Tar->new;
    $archive->read("$dir/$shared_files_tarball");

    # because that would be a veeery bad idea
    croak "archive '$shared_files_tarball' contains files with absolute path, aborting"
        if grep { m#^/# } $archive->list_files;

    my $tmpdir = tempdir( CLEANUP => 1 );
    local $CWD = $tmpdir;

    $archive->extract;

    return $tmpdir;
}

sub dist_file {
    my $dist = File::ShareDir::_DIST(shift);
    my $file = File::ShareDir::_FILE(shift);

    my $path = dist_dir($dist).'/'.$file;

    return undef unless -e $path;

    croak("Found dist_file '$path', but not a file")
        unless -f $path;

    croak("File '$path', no read permissions")
        unless -r $path;

    return $path;
}

1;

__END__